bump version to 0.1.5

not to /etc/ssh/sshd_config.d/*.conf because openssh in Rocky Linux in 8
does not support the config.dy directory.

.clang-format

@@ -0,0 +1,747 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# clang-format configuration file. Intended for clang-format >= 11.
+#
+# For more information, see:
+#
+#   Documentation/process/clang-format.rst
+#   https://clang.llvm.org/docs/ClangFormat.html
+#   https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+#
+
+# clang-format configuration for Linux kernel, except that ColumnLimit is 90
+---
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Left
+AlignOperands: true
+AlignTrailingComments: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterClass: false
+  AfterControlStatement: false
+  AfterEnum: false
+  AfterFunction: true
+  AfterNamespace: true
+  AfterObjCDeclaration: false
+  AfterStruct: false
+  AfterUnion: false
+  AfterExternBlock: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: false
+BreakConstructorInitializersBeforeComma: false
+BreakConstructorInitializers: BeforeComma
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: false
+ColumnLimit: 90
+CommentPragmas: '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 8
+ContinuationIndentWidth: 8
+Cpp11BracedListStyle: false
+DerivePointerAlignment: false
+DisableFormat: false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: false
+
+# Taken from:
+#   git grep -h '^#define [^[:space:]]*for_each[^[:space:]]*(' include/ tools/ \
+#   | sed "s,^#define \([^[:space:]]*for_each[^[:space:]]*\)(.*$,  - '\1'," \
+#   | LC_ALL=C sort -u
+ForEachMacros:
+  - '__ata_qc_for_each'
+  - '__bio_for_each_bvec'
+  - '__bio_for_each_segment'
+  - '__evlist__for_each_entry'
+  - '__evlist__for_each_entry_continue'
+  - '__evlist__for_each_entry_from'
+  - '__evlist__for_each_entry_reverse'
+  - '__evlist__for_each_entry_safe'
+  - '__for_each_mem_range'
+  - '__for_each_mem_range_rev'
+  - '__for_each_thread'
+  - '__hlist_for_each_rcu'
+  - '__map__for_each_symbol_by_name'
+  - '__pci_bus_for_each_res0'
+  - '__pci_bus_for_each_res1'
+  - '__pci_dev_for_each_res0'
+  - '__pci_dev_for_each_res1'
+  - '__perf_evlist__for_each_entry'
+  - '__perf_evlist__for_each_entry_reverse'
+  - '__perf_evlist__for_each_entry_safe'
+  - '__rq_for_each_bio'
+  - '__shost_for_each_device'
+  - '__sym_for_each'
+  - 'apei_estatus_for_each_section'
+  - 'ata_for_each_dev'
+  - 'ata_for_each_link'
+  - 'ata_qc_for_each'
+  - 'ata_qc_for_each_raw'
+  - 'ata_qc_for_each_with_internal'
+  - 'ax25_for_each'
+  - 'ax25_uid_for_each'
+  - 'bio_for_each_bvec'
+  - 'bio_for_each_bvec_all'
+  - 'bio_for_each_folio_all'
+  - 'bio_for_each_integrity_vec'
+  - 'bio_for_each_segment'
+  - 'bio_for_each_segment_all'
+  - 'bio_list_for_each'
+  - 'bip_for_each_vec'
+  - 'bond_for_each_slave'
+  - 'bond_for_each_slave_rcu'
+  - 'bpf_for_each'
+  - 'bpf_for_each_reg_in_vstate'
+  - 'bpf_for_each_reg_in_vstate_mask'
+  - 'bpf_for_each_spilled_reg'
+  - 'bpf_object__for_each_map'
+  - 'bpf_object__for_each_program'
+  - 'btree_for_each_safe128'
+  - 'btree_for_each_safe32'
+  - 'btree_for_each_safe64'
+  - 'btree_for_each_safel'
+  - 'card_for_each_dev'
+  - 'cgroup_taskset_for_each'
+  - 'cgroup_taskset_for_each_leader'
+  - 'cpu_aggr_map__for_each_idx'
+  - 'cpufreq_for_each_efficient_entry_idx'
+  - 'cpufreq_for_each_entry'
+  - 'cpufreq_for_each_entry_idx'
+  - 'cpufreq_for_each_valid_entry'
+  - 'cpufreq_for_each_valid_entry_idx'
+  - 'css_for_each_child'
+  - 'css_for_each_descendant_post'
+  - 'css_for_each_descendant_pre'
+  - 'damon_for_each_region'
+  - 'damon_for_each_region_from'
+  - 'damon_for_each_region_safe'
+  - 'damon_for_each_scheme'
+  - 'damon_for_each_scheme_safe'
+  - 'damon_for_each_target'
+  - 'damon_for_each_target_safe'
+  - 'damos_for_each_filter'
+  - 'damos_for_each_filter_safe'
+  - 'data__for_each_file'
+  - 'data__for_each_file_new'
+  - 'data__for_each_file_start'
+  - 'device_for_each_child_node'
+  - 'displayid_iter_for_each'
+  - 'dma_fence_array_for_each'
+  - 'dma_fence_chain_for_each'
+  - 'dma_fence_unwrap_for_each'
+  - 'dma_resv_for_each_fence'
+  - 'dma_resv_for_each_fence_unlocked'
+  - 'do_for_each_ftrace_op'
+  - 'drm_atomic_crtc_for_each_plane'
+  - 'drm_atomic_crtc_state_for_each_plane'
+  - 'drm_atomic_crtc_state_for_each_plane_state'
+  - 'drm_atomic_for_each_plane_damage'
+  - 'drm_client_for_each_connector_iter'
+  - 'drm_client_for_each_modeset'
+  - 'drm_connector_for_each_possible_encoder'
+  - 'drm_exec_for_each_locked_object'
+  - 'drm_exec_for_each_locked_object_reverse'
+  - 'drm_for_each_bridge_in_chain'
+  - 'drm_for_each_connector_iter'
+  - 'drm_for_each_crtc'
+  - 'drm_for_each_crtc_reverse'
+  - 'drm_for_each_encoder'
+  - 'drm_for_each_encoder_mask'
+  - 'drm_for_each_fb'
+  - 'drm_for_each_legacy_plane'
+  - 'drm_for_each_plane'
+  - 'drm_for_each_plane_mask'
+  - 'drm_for_each_privobj'
+  - 'drm_gem_for_each_gpuva'
+  - 'drm_gem_for_each_gpuva_safe'
+  - 'drm_gpuva_for_each_op'
+  - 'drm_gpuva_for_each_op_from_reverse'
+  - 'drm_gpuva_for_each_op_safe'
+  - 'drm_gpuvm_for_each_va'
+  - 'drm_gpuvm_for_each_va_range'
+  - 'drm_gpuvm_for_each_va_range_safe'
+  - 'drm_gpuvm_for_each_va_safe'
+  - 'drm_mm_for_each_hole'
+  - 'drm_mm_for_each_node'
+  - 'drm_mm_for_each_node_in_range'
+  - 'drm_mm_for_each_node_safe'
+  - 'dsa_switch_for_each_available_port'
+  - 'dsa_switch_for_each_cpu_port'
+  - 'dsa_switch_for_each_cpu_port_continue_reverse'
+  - 'dsa_switch_for_each_port'
+  - 'dsa_switch_for_each_port_continue_reverse'
+  - 'dsa_switch_for_each_port_safe'
+  - 'dsa_switch_for_each_user_port'
+  - 'dsa_tree_for_each_cpu_port'
+  - 'dsa_tree_for_each_user_port'
+  - 'dsa_tree_for_each_user_port_continue_reverse'
+  - 'dso__for_each_symbol'
+  - 'dsos__for_each_with_build_id'
+  - 'elf_hash_for_each_possible'
+  - 'elf_symtab__for_each_symbol'
+  - 'evlist__for_each_cpu'
+  - 'evlist__for_each_entry'
+  - 'evlist__for_each_entry_continue'
+  - 'evlist__for_each_entry_from'
+  - 'evlist__for_each_entry_reverse'
+  - 'evlist__for_each_entry_safe'
+  - 'flow_action_for_each'
+  - 'for_each_acpi_consumer_dev'
+  - 'for_each_acpi_dev_match'
+  - 'for_each_active_dev_scope'
+  - 'for_each_active_drhd_unit'
+  - 'for_each_active_iommu'
+  - 'for_each_active_route'
+  - 'for_each_aggr_pgid'
+  - 'for_each_and_bit'
+  - 'for_each_andnot_bit'
+  - 'for_each_available_child_of_node'
+  - 'for_each_bench'
+  - 'for_each_bio'
+  - 'for_each_board_func_rsrc'
+  - 'for_each_btf_ext_rec'
+  - 'for_each_btf_ext_sec'
+  - 'for_each_bvec'
+  - 'for_each_card_auxs'
+  - 'for_each_card_auxs_safe'
+  - 'for_each_card_components'
+  - 'for_each_card_dapms'
+  - 'for_each_card_pre_auxs'
+  - 'for_each_card_prelinks'
+  - 'for_each_card_rtds'
+  - 'for_each_card_rtds_safe'
+  - 'for_each_card_widgets'
+  - 'for_each_card_widgets_safe'
+  - 'for_each_cgroup_storage_type'
+  - 'for_each_child_of_node'
+  - 'for_each_clear_bit'
+  - 'for_each_clear_bit_from'
+  - 'for_each_clear_bitrange'
+  - 'for_each_clear_bitrange_from'
+  - 'for_each_cmd'
+  - 'for_each_cmsghdr'
+  - 'for_each_collection'
+  - 'for_each_comp_order'
+  - 'for_each_compatible_node'
+  - 'for_each_component_dais'
+  - 'for_each_component_dais_safe'
+  - 'for_each_conduit'
+  - 'for_each_console'
+  - 'for_each_console_srcu'
+  - 'for_each_cpu'
+  - 'for_each_cpu_and'
+  - 'for_each_cpu_andnot'
+  - 'for_each_cpu_or'
+  - 'for_each_cpu_wrap'
+  - 'for_each_dapm_widgets'
+  - 'for_each_dedup_cand'
+  - 'for_each_dev_addr'
+  - 'for_each_dev_scope'
+  - 'for_each_dma_cap_mask'
+  - 'for_each_dpcm_be'
+  - 'for_each_dpcm_be_rollback'
+  - 'for_each_dpcm_be_safe'
+  - 'for_each_dpcm_fe'
+  - 'for_each_drhd_unit'
+  - 'for_each_dss_dev'
+  - 'for_each_efi_memory_desc'
+  - 'for_each_efi_memory_desc_in_map'
+  - 'for_each_element'
+  - 'for_each_element_extid'
+  - 'for_each_element_id'
+  - 'for_each_endpoint_of_node'
+  - 'for_each_event'
+  - 'for_each_event_tps'
+  - 'for_each_evictable_lru'
+  - 'for_each_fib6_node_rt_rcu'
+  - 'for_each_fib6_walker_rt'
+  - 'for_each_free_mem_pfn_range_in_zone'
+  - 'for_each_free_mem_pfn_range_in_zone_from'
+  - 'for_each_free_mem_range'
+  - 'for_each_free_mem_range_reverse'
+  - 'for_each_func_rsrc'
+  - 'for_each_gpiochip_node'
+  - 'for_each_group_evsel'
+  - 'for_each_group_evsel_head'
+  - 'for_each_group_member'
+  - 'for_each_group_member_head'
+  - 'for_each_hstate'
+  - 'for_each_if'
+  - 'for_each_inject_fn'
+  - 'for_each_insn'
+  - 'for_each_insn_prefix'
+  - 'for_each_intid'
+  - 'for_each_iommu'
+  - 'for_each_ip_tunnel_rcu'
+  - 'for_each_irq_nr'
+  - 'for_each_lang'
+  - 'for_each_link_codecs'
+  - 'for_each_link_cpus'
+  - 'for_each_link_platforms'
+  - 'for_each_lru'
+  - 'for_each_matching_node'
+  - 'for_each_matching_node_and_match'
+  - 'for_each_media_entity_data_link'
+  - 'for_each_mem_pfn_range'
+  - 'for_each_mem_range'
+  - 'for_each_mem_range_rev'
+  - 'for_each_mem_region'
+  - 'for_each_member'
+  - 'for_each_memory'
+  - 'for_each_migratetype_order'
+  - 'for_each_missing_reg'
+  - 'for_each_mle_subelement'
+  - 'for_each_mod_mem_type'
+  - 'for_each_net'
+  - 'for_each_net_continue_reverse'
+  - 'for_each_net_rcu'
+  - 'for_each_netdev'
+  - 'for_each_netdev_continue'
+  - 'for_each_netdev_continue_rcu'
+  - 'for_each_netdev_continue_reverse'
+  - 'for_each_netdev_dump'
+  - 'for_each_netdev_feature'
+  - 'for_each_netdev_in_bond_rcu'
+  - 'for_each_netdev_rcu'
+  - 'for_each_netdev_reverse'
+  - 'for_each_netdev_safe'
+  - 'for_each_new_connector_in_state'
+  - 'for_each_new_crtc_in_state'
+  - 'for_each_new_mst_mgr_in_state'
+  - 'for_each_new_plane_in_state'
+  - 'for_each_new_plane_in_state_reverse'
+  - 'for_each_new_private_obj_in_state'
+  - 'for_each_new_reg'
+  - 'for_each_node'
+  - 'for_each_node_by_name'
+  - 'for_each_node_by_type'
+  - 'for_each_node_mask'
+  - 'for_each_node_state'
+  - 'for_each_node_with_cpus'
+  - 'for_each_node_with_property'
+  - 'for_each_nonreserved_multicast_dest_pgid'
+  - 'for_each_numa_hop_mask'
+  - 'for_each_of_allnodes'
+  - 'for_each_of_allnodes_from'
+  - 'for_each_of_cpu_node'
+  - 'for_each_of_pci_range'
+  - 'for_each_old_connector_in_state'
+  - 'for_each_old_crtc_in_state'
+  - 'for_each_old_mst_mgr_in_state'
+  - 'for_each_old_plane_in_state'
+  - 'for_each_old_private_obj_in_state'
+  - 'for_each_oldnew_connector_in_state'
+  - 'for_each_oldnew_crtc_in_state'
+  - 'for_each_oldnew_mst_mgr_in_state'
+  - 'for_each_oldnew_plane_in_state'
+  - 'for_each_oldnew_plane_in_state_reverse'
+  - 'for_each_oldnew_private_obj_in_state'
+  - 'for_each_online_cpu'
+  - 'for_each_online_node'
+  - 'for_each_online_pgdat'
+  - 'for_each_or_bit'
+  - 'for_each_path'
+  - 'for_each_pci_bridge'
+  - 'for_each_pci_dev'
+  - 'for_each_pcm_streams'
+  - 'for_each_physmem_range'
+  - 'for_each_populated_zone'
+  - 'for_each_possible_cpu'
+  - 'for_each_present_blessed_reg'
+  - 'for_each_present_cpu'
+  - 'for_each_prime_number'
+  - 'for_each_prime_number_from'
+  - 'for_each_probe_cache_entry'
+  - 'for_each_process'
+  - 'for_each_process_thread'
+  - 'for_each_prop_codec_conf'
+  - 'for_each_prop_dai_codec'
+  - 'for_each_prop_dai_cpu'
+  - 'for_each_prop_dlc_codecs'
+  - 'for_each_prop_dlc_cpus'
+  - 'for_each_prop_dlc_platforms'
+  - 'for_each_property_of_node'
+  - 'for_each_reg'
+  - 'for_each_reg_filtered'
+  - 'for_each_reloc'
+  - 'for_each_reloc_from'
+  - 'for_each_requested_gpio'
+  - 'for_each_requested_gpio_in_range'
+  - 'for_each_reserved_mem_range'
+  - 'for_each_reserved_mem_region'
+  - 'for_each_rtd_codec_dais'
+  - 'for_each_rtd_components'
+  - 'for_each_rtd_cpu_dais'
+  - 'for_each_rtd_dais'
+  - 'for_each_sband_iftype_data'
+  - 'for_each_script'
+  - 'for_each_sec'
+  - 'for_each_set_bit'
+  - 'for_each_set_bit_from'
+  - 'for_each_set_bit_wrap'
+  - 'for_each_set_bitrange'
+  - 'for_each_set_bitrange_from'
+  - 'for_each_set_clump8'
+  - 'for_each_sg'
+  - 'for_each_sg_dma_page'
+  - 'for_each_sg_page'
+  - 'for_each_sgtable_dma_page'
+  - 'for_each_sgtable_dma_sg'
+  - 'for_each_sgtable_page'
+  - 'for_each_sgtable_sg'
+  - 'for_each_sibling_event'
+  - 'for_each_sta_active_link'
+  - 'for_each_subelement'
+  - 'for_each_subelement_extid'
+  - 'for_each_subelement_id'
+  - 'for_each_sublist'
+  - 'for_each_subsystem'
+  - 'for_each_supported_activate_fn'
+  - 'for_each_supported_inject_fn'
+  - 'for_each_sym'
+  - 'for_each_test'
+  - 'for_each_thread'
+  - 'for_each_token'
+  - 'for_each_unicast_dest_pgid'
+  - 'for_each_valid_link'
+  - 'for_each_vif_active_link'
+  - 'for_each_vma'
+  - 'for_each_vma_range'
+  - 'for_each_vsi'
+  - 'for_each_wakeup_source'
+  - 'for_each_zone'
+  - 'for_each_zone_zonelist'
+  - 'for_each_zone_zonelist_nodemask'
+  - 'func_for_each_insn'
+  - 'fwnode_for_each_available_child_node'
+  - 'fwnode_for_each_child_node'
+  - 'fwnode_for_each_parent_node'
+  - 'fwnode_graph_for_each_endpoint'
+  - 'gadget_for_each_ep'
+  - 'genradix_for_each'
+  - 'genradix_for_each_from'
+  - 'genradix_for_each_reverse'
+  - 'hash_for_each'
+  - 'hash_for_each_possible'
+  - 'hash_for_each_possible_rcu'
+  - 'hash_for_each_possible_rcu_notrace'
+  - 'hash_for_each_possible_safe'
+  - 'hash_for_each_rcu'
+  - 'hash_for_each_safe'
+  - 'hashmap__for_each_entry'
+  - 'hashmap__for_each_entry_safe'
+  - 'hashmap__for_each_key_entry'
+  - 'hashmap__for_each_key_entry_safe'
+  - 'hctx_for_each_ctx'
+  - 'hists__for_each_format'
+  - 'hists__for_each_sort_list'
+  - 'hlist_bl_for_each_entry'
+  - 'hlist_bl_for_each_entry_rcu'
+  - 'hlist_bl_for_each_entry_safe'
+  - 'hlist_for_each'
+  - 'hlist_for_each_entry'
+  - 'hlist_for_each_entry_continue'
+  - 'hlist_for_each_entry_continue_rcu'
+  - 'hlist_for_each_entry_continue_rcu_bh'
+  - 'hlist_for_each_entry_from'
+  - 'hlist_for_each_entry_from_rcu'
+  - 'hlist_for_each_entry_rcu'
+  - 'hlist_for_each_entry_rcu_bh'
+  - 'hlist_for_each_entry_rcu_notrace'
+  - 'hlist_for_each_entry_safe'
+  - 'hlist_for_each_entry_srcu'
+  - 'hlist_for_each_safe'
+  - 'hlist_nulls_for_each_entry'
+  - 'hlist_nulls_for_each_entry_from'
+  - 'hlist_nulls_for_each_entry_rcu'
+  - 'hlist_nulls_for_each_entry_safe'
+  - 'i3c_bus_for_each_i2cdev'
+  - 'i3c_bus_for_each_i3cdev'
+  - 'idr_for_each_entry'
+  - 'idr_for_each_entry_continue'
+  - 'idr_for_each_entry_continue_ul'
+  - 'idr_for_each_entry_ul'
+  - 'in_dev_for_each_ifa_rcu'
+  - 'in_dev_for_each_ifa_rtnl'
+  - 'inet_bind_bucket_for_each'
+  - 'interval_tree_for_each_span'
+  - 'intlist__for_each_entry'
+  - 'intlist__for_each_entry_safe'
+  - 'kcore_copy__for_each_phdr'
+  - 'key_for_each'
+  - 'key_for_each_safe'
+  - 'klp_for_each_func'
+  - 'klp_for_each_func_safe'
+  - 'klp_for_each_func_static'
+  - 'klp_for_each_object'
+  - 'klp_for_each_object_safe'
+  - 'klp_for_each_object_static'
+  - 'kunit_suite_for_each_test_case'
+  - 'kvm_for_each_memslot'
+  - 'kvm_for_each_memslot_in_gfn_range'
+  - 'kvm_for_each_vcpu'
+  - 'libbpf_nla_for_each_attr'
+  - 'list_for_each'
+  - 'list_for_each_codec'
+  - 'list_for_each_codec_safe'
+  - 'list_for_each_continue'
+  - 'list_for_each_entry'
+  - 'list_for_each_entry_continue'
+  - 'list_for_each_entry_continue_rcu'
+  - 'list_for_each_entry_continue_reverse'
+  - 'list_for_each_entry_from'
+  - 'list_for_each_entry_from_rcu'
+  - 'list_for_each_entry_from_reverse'
+  - 'list_for_each_entry_lockless'
+  - 'list_for_each_entry_rcu'
+  - 'list_for_each_entry_reverse'
+  - 'list_for_each_entry_safe'
+  - 'list_for_each_entry_safe_continue'
+  - 'list_for_each_entry_safe_from'
+  - 'list_for_each_entry_safe_reverse'
+  - 'list_for_each_entry_srcu'
+  - 'list_for_each_from'
+  - 'list_for_each_prev'
+  - 'list_for_each_prev_safe'
+  - 'list_for_each_rcu'
+  - 'list_for_each_reverse'
+  - 'list_for_each_safe'
+  - 'llist_for_each'
+  - 'llist_for_each_entry'
+  - 'llist_for_each_entry_safe'
+  - 'llist_for_each_safe'
+  - 'lwq_for_each_safe'
+  - 'map__for_each_symbol'
+  - 'map__for_each_symbol_by_name'
+  - 'maps__for_each_entry'
+  - 'maps__for_each_entry_safe'
+  - 'mas_for_each'
+  - 'mci_for_each_dimm'
+  - 'media_device_for_each_entity'
+  - 'media_device_for_each_intf'
+  - 'media_device_for_each_link'
+  - 'media_device_for_each_pad'
+  - 'media_entity_for_each_pad'
+  - 'media_pipeline_for_each_entity'
+  - 'media_pipeline_for_each_pad'
+  - 'mlx5_lag_for_each_peer_mdev'
+  - 'msi_domain_for_each_desc'
+  - 'msi_for_each_desc'
+  - 'mt_for_each'
+  - 'nanddev_io_for_each_page'
+  - 'netdev_for_each_lower_dev'
+  - 'netdev_for_each_lower_private'
+  - 'netdev_for_each_lower_private_rcu'
+  - 'netdev_for_each_mc_addr'
+  - 'netdev_for_each_synced_mc_addr'
+  - 'netdev_for_each_synced_uc_addr'
+  - 'netdev_for_each_uc_addr'
+  - 'netdev_for_each_upper_dev_rcu'
+  - 'netdev_hw_addr_list_for_each'
+  - 'nft_rule_for_each_expr'
+  - 'nla_for_each_attr'
+  - 'nla_for_each_nested'
+  - 'nlmsg_for_each_attr'
+  - 'nlmsg_for_each_msg'
+  - 'nr_neigh_for_each'
+  - 'nr_neigh_for_each_safe'
+  - 'nr_node_for_each'
+  - 'nr_node_for_each_safe'
+  - 'of_for_each_phandle'
+  - 'of_property_for_each_string'
+  - 'of_property_for_each_u32'
+  - 'pci_bus_for_each_resource'
+  - 'pci_dev_for_each_resource'
+  - 'pcl_for_each_chunk'
+  - 'pcl_for_each_segment'
+  - 'pcm_for_each_format'
+  - 'perf_config_items__for_each_entry'
+  - 'perf_config_sections__for_each_entry'
+  - 'perf_config_set__for_each_entry'
+  - 'perf_cpu_map__for_each_cpu'
+  - 'perf_cpu_map__for_each_idx'
+  - 'perf_evlist__for_each_entry'
+  - 'perf_evlist__for_each_entry_reverse'
+  - 'perf_evlist__for_each_entry_safe'
+  - 'perf_evlist__for_each_evsel'
+  - 'perf_evlist__for_each_mmap'
+  - 'perf_hpp_list__for_each_format'
+  - 'perf_hpp_list__for_each_format_safe'
+  - 'perf_hpp_list__for_each_sort_list'
+  - 'perf_hpp_list__for_each_sort_list_safe'
+  - 'perf_tool_event__for_each_event'
+  - 'plist_for_each'
+  - 'plist_for_each_continue'
+  - 'plist_for_each_entry'
+  - 'plist_for_each_entry_continue'
+  - 'plist_for_each_entry_safe'
+  - 'plist_for_each_safe'
+  - 'pnp_for_each_card'
+  - 'pnp_for_each_dev'
+  - 'protocol_for_each_card'
+  - 'protocol_for_each_dev'
+  - 'queue_for_each_hw_ctx'
+  - 'radix_tree_for_each_slot'
+  - 'radix_tree_for_each_tagged'
+  - 'rb_for_each'
+  - 'rbtree_postorder_for_each_entry_safe'
+  - 'rdma_for_each_block'
+  - 'rdma_for_each_port'
+  - 'rdma_umem_for_each_dma_block'
+  - 'resort_rb__for_each_entry'
+  - 'resource_list_for_each_entry'
+  - 'resource_list_for_each_entry_safe'
+  - 'rhl_for_each_entry_rcu'
+  - 'rhl_for_each_rcu'
+  - 'rht_for_each'
+  - 'rht_for_each_entry'
+  - 'rht_for_each_entry_from'
+  - 'rht_for_each_entry_rcu'
+  - 'rht_for_each_entry_rcu_from'
+  - 'rht_for_each_entry_safe'
+  - 'rht_for_each_from'
+  - 'rht_for_each_rcu'
+  - 'rht_for_each_rcu_from'
+  - 'rq_for_each_bvec'
+  - 'rq_for_each_segment'
+  - 'rq_list_for_each'
+  - 'rq_list_for_each_safe'
+  - 'sample_read_group__for_each'
+  - 'scsi_for_each_prot_sg'
+  - 'scsi_for_each_sg'
+  - 'sctp_for_each_hentry'
+  - 'sctp_skb_for_each'
+  - 'sec_for_each_insn'
+  - 'sec_for_each_insn_continue'
+  - 'sec_for_each_insn_from'
+  - 'sec_for_each_sym'
+  - 'shdma_for_each_chan'
+  - 'shost_for_each_device'
+  - 'sk_for_each'
+  - 'sk_for_each_bound'
+  - 'sk_for_each_bound_bhash2'
+  - 'sk_for_each_entry_offset_rcu'
+  - 'sk_for_each_from'
+  - 'sk_for_each_rcu'
+  - 'sk_for_each_safe'
+  - 'sk_nulls_for_each'
+  - 'sk_nulls_for_each_from'
+  - 'sk_nulls_for_each_rcu'
+  - 'snd_array_for_each'
+  - 'snd_pcm_group_for_each_entry'
+  - 'snd_soc_dapm_widget_for_each_path'
+  - 'snd_soc_dapm_widget_for_each_path_safe'
+  - 'snd_soc_dapm_widget_for_each_sink_path'
+  - 'snd_soc_dapm_widget_for_each_source_path'
+  - 'strlist__for_each_entry'
+  - 'strlist__for_each_entry_safe'
+  - 'sym_for_each_insn'
+  - 'sym_for_each_insn_continue_reverse'
+  - 'symbols__for_each_entry'
+  - 'tb_property_for_each'
+  - 'tcf_act_for_each_action'
+  - 'tcf_exts_for_each_action'
+  - 'ttm_resource_manager_for_each_res'
+  - 'twsk_for_each_bound_bhash2'
+  - 'udp_portaddr_for_each_entry'
+  - 'udp_portaddr_for_each_entry_rcu'
+  - 'usb_hub_for_each_child'
+  - 'v4l2_device_for_each_subdev'
+  - 'v4l2_m2m_for_each_dst_buf'
+  - 'v4l2_m2m_for_each_dst_buf_safe'
+  - 'v4l2_m2m_for_each_src_buf'
+  - 'v4l2_m2m_for_each_src_buf_safe'
+  - 'virtio_device_for_each_vq'
+  - 'while_for_each_ftrace_op'
+  - 'xa_for_each'
+  - 'xa_for_each_marked'
+  - 'xa_for_each_range'
+  - 'xa_for_each_start'
+  - 'xas_for_each'
+  - 'xas_for_each_conflict'
+  - 'xas_for_each_marked'
+  - 'xbc_array_for_each_value'
+  - 'xbc_for_each_key_value'
+  - 'xbc_node_for_each_array_value'
+  - 'xbc_node_for_each_child'
+  - 'xbc_node_for_each_key_value'
+  - 'xbc_node_for_each_subkey'
+  - 'zorro_for_each_dev'
+  - 'pool_iter_for_each'
+  - 'pool_for_each'
+
+IncludeBlocks: Preserve
+IncludeCategories:
+  - Regex: '.*'
+    Priority: 1
+IncludeIsMainRegex: '(Test)?$'
+IndentCaseLabels: false
+IndentGotoLabels: false
+IndentPPDirectives: None
+IndentWidth: 8
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBinPackProtocolList: Auto
+ObjCBlockIndentWidth: 8
+ObjCSpaceAfterProperty: true
+ObjCSpaceBeforeProtocolList: true
+
+# Taken from git's rules
+PenaltyBreakAssignment: 10
+PenaltyBreakBeforeFirstCallParameter: 30
+PenaltyBreakComment: 10
+PenaltyBreakFirstLessLess: 0
+PenaltyBreakString: 10
+PenaltyExcessCharacter: 100
+PenaltyReturnTypeOnItsOwnLine: 60
+
+PointerAlignment: Right
+ReflowComments: false
+SortIncludes: false
+SortUsingDeclarations: false
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatementsExceptForEachMacros
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInContainerLiterals: false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Cpp03
+TabWidth: 8
+UseTab: Always
+...

.github/workflows/build-freebsd.yml

@@ -0,0 +1,27 @@
+name: build on FreeBSD
+
+on:
+  push:
+    branches: [ "main", "dev" ]
+  pull_request:
+    branches: [ "main", "dev" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+
+    - name: Build in FreeBSD
+      uses: vmactions/freebsd-vm@v1
+      with:
+        prepare: |
+          pkg install -y git cmake
+        run: |
+          patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
+          cmake -B build -DCMAKE_BUILD_TYPE=Release
+          cmake --build build
+          build/mscp -h

.github/workflows/build-macos.yml

@@ -2,9 +2,9 @@ name: build on macOS
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
   pull_request:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
 
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
@@ -30,7 +30,7 @@ jobs:
       run: echo "HOMEBREW_PREFIX=$(brew --prefix)" >> $GITHUB_OUTPUT
 
     - name: patch to libssh
-      run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+      run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.

.github/workflows/build-ubuntu.yml

@@ -2,9 +2,9 @@ name: build on ubuntu
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
   pull_request:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
 
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
@@ -23,10 +23,12 @@ jobs:
         submodules: true
 
     - name: install build dependency
-      run: sudo ./scripts/install-build-deps.sh
+      run: |
+        sudo apt-get update
+        sudo ./scripts/install-build-deps.sh
 
     - name: patch to libssh
-      run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+      run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.

.github/workflows/codeql.yml

@@ -13,10 +13,10 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
   schedule:
     - cron: '35 11 * * 5'
 
@@ -43,10 +43,12 @@ jobs:
         submodules: true
 
     - name: install build dependency
-      run: sudo ./scripts/install-build-deps.sh
+      run: |
+        sudo apt-get update
+        sudo ./scripts/install-build-deps.sh
 
     - name: patch to libssh
-      run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+      run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
           submodules: true
 
       - name: patch to libssh
-        run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+        run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
       # TODO: just building docker does not require packages. fix CMakeLists
       - name: install build dependency
@@ -33,22 +33,14 @@ jobs:
       - name: Test
         run: make -C ${{github.workspace}}/build docker-test-all
 
-      - name: Retrieve packages from containers
-        run: make -C ${{github.workspace}}/build docker-pkg-all
-
-      - name: Copy mscp single binary built inside Alpine
-        run: cp ${{github.workspace}}/build/mscp_alpine-3.17-x86_64.static ${{github.workspace}}/build/mscp.linux.x86.static
+      - name: Build single binary mscp
+        run: make -C ${{github.workspace}}/build build-single-binary
 
       - name: Release
         uses: softprops/action-gh-release@v1
         with:
           files: |
-            ${{github.workspace}}/build/mscp_ubuntu-20.04-x86_64.deb
-            ${{github.workspace}}/build/mscp_ubuntu-22.04-x86_64.deb
-            ${{github.workspace}}/build/mscp_rocky-8.8-x86_64.rpm
-            ${{github.workspace}}/build/mscp_almalinux-8.8-x86_64.rpm
-            ${{github.workspace}}/build/mscp_alpine-3.17-x86_64.static
-            ${{github.workspace}}/build/mscp.linux.x86.static
+            ${{github.workspace}}/build/mscp.linux.x86_64.static
 
   source-release:
     runs-on: ubuntu-latest
@@ -58,7 +50,7 @@ jobs:
           submodules: true
 
       - name: patch to libssh
-        run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+        run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
       - name: Set variables
         run: |

.github/workflows/test.yml

@@ -2,9 +2,9 @@ name: test
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
   pull_request:
-    branches: [ "main" ]
+    branches: [ "main", "dev" ]
 
 env:
   BUILD_TYPE: Release
@@ -18,11 +18,13 @@ jobs:
         submodules: true
 
     - name: patch to libssh
-      run: patch -d libssh -p1 < patch/libssh-0.10.4.patch
+      run: patch -d libssh -p1 < patch/libssh-0.10.6-2-g6f1b1e76.patch
 
     # TODO: just building docker does not require libssh. fix CMakeLists
     - name: install build dependency
-      run: sudo ./scripts/install-build-deps.sh
+      run: |
+        sudo apt-get update
+        sudo ./scripts/install-build-deps.sh
 
     - name: configure CMake
       run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}

.gitignore

@@ -4,6 +4,4 @@ compile_commands.json
 CMakeUserPresets.json
 .*.swp
 
-dist
-*.egg-info
-__pycache__
+include/mscp_version.h

CMakeLists.txt

@@ -6,6 +6,26 @@ project(mscp
 	VERSION ${MSCP_VERSION}
 	LANGUAGES C)
 
+
+find_package(Git)
+if (Git_FOUND)
+	# based on https://github.com/nocnokneo/cmake-git-versioning-example
+	execute_process(
+		COMMAND	${GIT_EXECUTABLE} describe --tags --match "v*"
+		OUTPUT_VARIABLE	GIT_DESCRIBE_VERSION
+		RESULT_VARIABLE	GIT_DESCRIBE_ERROR_CODE
+		OUTPUT_STRIP_TRAILING_WHITESPACE)
+	if(NOT GIT_DESCRIBE_ERROR_CODE)
+		set(MSCP_BUILD_VERSION ${GIT_DESCRIBE_VERSION})
+	endif()
+endif()
+
+if (NOT MSCP_BUILD_VERSION)
+	message(STATUS "Failed to determine version via Git. Use VERSION file instead.")
+	set(MSCP_BUILD_VERSION v${MSCP_VERSION})
+endif()
+
+
 include(GNUInstallDirs)
 
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DDEBUG")
@@ -31,6 +51,13 @@ if (BUILD_STATIC)
 	endif()
 endif()
 
+option(USE_PODMAN OFF) # use podman instread of docker
+if(USE_PODMAN)
+	message(STATUS "Use podman instead of docker")
+	set(CE podman) # CE means Container Engine
+else()
+	set(CE docker)
+endif()
 
 
 # add libssh static library
@@ -49,12 +76,12 @@ add_subdirectory(libssh EXCLUDE_FROM_ALL)
 
 
 # setup mscp compile options
-set(MSCP_COMPILE_OPTS -iquote ${CMAKE_CURRENT_BINARY_DIR}/libssh/include)
-set(MSCP_BUILD_INCLUDE_DIRS
+list(APPEND MSCP_COMPILE_OPTS -iquote ${CMAKE_CURRENT_BINARY_DIR}/libssh/include)
+list(APPEND MSCP_BUILD_INCLUDE_DIRS
 	${mscp_SOURCE_DIR}/src
 	${CMAKE_CURRENT_BINARY_DIR}/libssh/include)
 
-set(MSCP_LINK_LIBS ssh-static)
+list(APPEND MSCP_LINK_LIBS ssh-static)
 if(BUILD_CONAN)
 	find_package(ZLIB REQUIRED)
 	find_package(OpenSSL REQUIRED)
@@ -62,25 +89,28 @@ if(BUILD_CONAN)
 	list(APPEND MSCP_LINK_LIBS OpenSSL::Crypto)
 endif()
 
-set(LIBMSCP_SRC src/mscp.c src/ssh.c src/path.c src/platform.c src/message.c)
 
-# libmscp.so
-add_library(mscp-shared SHARED ${LIBMSCP_SRC})
-target_include_directories(mscp-shared
-	PUBLIC	$<BUILD_INTERFACE:${mscp_SOURCE_DIR}/include>
-		$<INSTALL_INTERFACE:include>
-	PRIVATE ${MSCP_BUILD_INCLUDE_DIRS})
-target_compile_options(mscp-shared PRIVATE ${MSCP_COMPILE_OPTS})
-target_link_libraries(mscp-shared PRIVATE ${MSCP_LINK_LIBS})
-set_target_properties(mscp-shared
-	PROPERTIES
-	OUTPUT_NAME	mscp
-	PUBLIC_HEADER	${mscp_SOURCE_DIR}/include/mscp.h)
+# Symbol check
+check_symbol_exists(htonll	arpa/inet.h	HAVE_HTONLL)
+check_symbol_exists(ntohll	arpa/inet.h	HAVE_NTOHLL)
+check_symbol_exists(strlcat	string.h	HAVE_STRLCAT)
+if (NOT HAVE_STRLCAT)
+	list(APPEND OPENBSD_COMPAT_SRC src/openbsd-compat/strlcat.c)
+endif()
 
-install(TARGETS mscp-shared)
+
+# generate config.h in build dir
+configure_file(
+	${mscp_SOURCE_DIR}/include/config.h.in
+	${CMAKE_CURRENT_BINARY_DIR}/include/config.h)
+list(APPEND MSCP_BUILD_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR}/include)
 
 
 # libmscp.a
+set(LIBMSCP_SRC
+	src/mscp.c src/ssh.c src/fileops.c src/path.c src/checkpoint.c
+	src/platform.c src/print.c src/pool.c src/strerrno.c
+	${OPENBSD_COMPAT_SRC})
 add_library(mscp-static STATIC ${LIBMSCP_SRC})
 target_include_directories(mscp-static
 	PRIVATE ${MSCP_BUILD_INCLUDE_DIRS} ${mscp_SOURCE_DIR}/include)
@@ -90,9 +120,6 @@ set_target_properties(mscp-static
 	PROPERTIES
 	OUTPUT_NAME	mscp)
 
-install(TARGETS mscp-static)
-
-
 # mscp executable
 list(APPEND MSCP_LINK_LIBS m pthread)
 
@@ -104,12 +131,26 @@ if (BUILD_STATIC)
 	target_link_options(mscp PRIVATE -static)
 endif()
 target_compile_options(mscp PRIVATE ${MSCP_COMPILE_OPTS})
-target_compile_definitions(mscp PUBLIC _VERSION="${PROJECT_VERSION}")
 
 
 install(TARGETS mscp RUNTIME DESTINATION bin)
 
 
+# mscp manpage and document
+configure_file(
+	${mscp_SOURCE_DIR}/doc/mscp.1.in
+	${PROJECT_BINARY_DIR}/mscp.1)
+
+add_custom_target(update-rst
+	COMMENT "Update doc/mscp.rst from mscp.1.in"
+	WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+	COMMAND
+	pandoc -s -f man mscp.1 -t rst -o ${PROJECT_SOURCE_DIR}/doc/mscp.rst)
+
+install(FILES ${PROJECT_BINARY_DIR}/mscp.1
+	DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
+
+
 # Test
 add_test(NAME	pytest
 	COMMAND	python3 -m pytest -v
@@ -120,89 +161,128 @@ enable_testing()
 
 
 
-# CPACK Rules
-#set(CPACK_SET_DESTDIR		true)
-set(CPACK_PACKAGE_NAME		${PROJECT_NAME})
-set(CPACK_PACKAGE_CONTACT	"Ryo Nakamura <upa@haeena.net>")
-set(CPACK_PACKAGE_DESCRIPTION
-	"mscp, copy files over multiple ssh connections")
-
-execute_process(COMMAND uname -m
-	OUTPUT_VARIABLE ARCH OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-if(UNIX AND NOT APPLE) # on linux
-	execute_process(COMMAND
-		bash "-c" "cat /etc/os-release|grep '^ID='|cut -d '=' -f 2|tr -d '\"'"
-		OUTPUT_VARIABLE DIST_NAME OUTPUT_STRIP_TRAILING_WHITESPACE)
-	execute_process(COMMAND
-		bash "-c" "cat /etc/os-release|grep '^VERSION_ID='|cut -d '=' -f 2|tr -d '\"'"
-		OUTPUT_VARIABLE DIST_VER OUTPUT_STRIP_TRAILING_WHITESPACE)
-	execute_process(COMMAND
-		bash "-c" "${mscp_SOURCE_DIR}/scripts/print-install-deps.sh ${DIST_NAME}-${DIST_VER}"
-		OUTPUT_VARIABLE DIST_DEP OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-	set(PACKAGE_FILE_NAME
-		${PROJECT_NAME}_${DIST_NAME}-${DIST_VER}-${ARCH})
-
-	set(CPACK_DEBIAN_FILE_NAME		${PACKAGE_FILE_NAME}.deb)
-	set(CPACK_DEBIAN_PACKAGE_DEPENDS	${DIST_DEP})
-	set(CPACK_DEBIAN_PACKAGE_HOMEPAGE	"https://github.com/upa/mscp")
-
-	set(CPACK_RPM_FILE_NAME			${PACKAGE_FILE_NAME}.rpm)
-	set(CPACK_RPM_PACKAGE_REQUIRES		${DIST_DEP})
-	set(CPACK_RPM_PACKAGE_HOMEPAGE		"https://github.com/upa/mscp")
-	set(CPACK_RPM_PACKAGE_DESCRIPTION	${CPACK_PACKAGE_DESCRIPTION})
-	set(CPACK_RPM_PACKAGE_LICENSE		"GPLv3")
-endif() # on linux
-
-include(CPack)
-
-
 
 # Custom targets to build and test mscp in docker containers.
 # foreach(IN ZIP_LISTS) (cmake >= 3.17) can shorten the following lists.
 # However, ubuntu 20.04 has cmake 3.16.3. So this is a roundabout trick.
-list(APPEND DIST_NAMES	ubuntu	ubuntu	rocky	almalinux	alpine)
-list(APPEND DIST_VERS	20.04	22.04	8.8	8.8		3.17)
-list(APPEND DIST_PKGS	deb	deb	rpm	rpm		static)
+list(APPEND DIST_IDS	ubuntu	ubuntu	rocky	rocky	almalinux	alpine)
+list(APPEND DIST_VERS	20.04	22.04	8.9	9.3	9.3		3.19)
+list(APPEND DIST_PKGS	deb	deb	rpm	rpm	rpm		static)
 
-list(LENGTH DIST_NAMES _DIST_LISTLEN)
+list(LENGTH DIST_IDS _DIST_LISTLEN)
 math(EXPR DIST_LISTLEN "${_DIST_LISTLEN} - 1")
 
 foreach(x RANGE ${DIST_LISTLEN})
-	list(GET DIST_NAMES	${x} DIST_NAME)
+	list(GET DIST_IDS	${x} DIST_ID)
 	list(GET DIST_VERS	${x} DIST_VER)
 	list(GET DIST_PKGS	${x} DIST_PKG)
 
-	set(DOCKER_IMAGE mscp-${DIST_NAME}:${DIST_VER})
-	set(DOCKER_INDEX ${DIST_NAME}-${DIST_VER})
-	set(PKG_FILE_NAME
-		mscp_${DIST_NAME}-${DIST_VER}-${ARCH}.${DIST_PKG})
+	set(DOCKER_IMAGE mscp-${DIST_ID}:${DIST_VER})
+	set(DOCKER_INDEX ${DIST_ID}-${DIST_VER})
+	execute_process(
+		COMMAND ${CMAKE_SOURCE_DIR}/scripts/install-build-deps.sh
+		--dont-install --platform Linux-${DIST_ID}
+		OUTPUT_VARIABLE REQUIREDPKGS
+		OUTPUT_STRIP_TRAILING_WHITESPACE)
 
 	add_custom_target(docker-build-${DOCKER_INDEX}
 		COMMENT "Build mscp in ${DOCKER_IMAGE} container"
 		WORKING_DIRECTORY ${mscp_SOURCE_DIR}
 		COMMAND
-		docker build -t ${DOCKER_IMAGE} -f docker/${DOCKER_INDEX}.Dockerfile .)
+		${CE} build --build-arg REQUIREDPKGS=${REQUIREDPKGS}
+		-t ${DOCKER_IMAGE} -f Dockerfile/${DOCKER_INDEX}.Dockerfile .)
+
+	add_custom_target(docker-build-${DOCKER_INDEX}-no-cache
+		COMMENT "Build mscp in ${DOCKER_IMAGE} container"
+		WORKING_DIRECTORY ${mscp_SOURCE_DIR}
+		COMMAND
+		${CE} build --build-arg REQUIREDPKGS=${REQUIREDPKGS} --no-cache
+		-t ${DOCKER_IMAGE} -f Dockerfile/${DOCKER_INDEX}.Dockerfile .)
 
 	add_custom_target(docker-test-${DOCKER_INDEX}
 		COMMENT "Test mscp in ${DOCKER_IMAGE} container"
 		WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
 		COMMAND
-		docker run --init --rm ${DOCKER_IMAGE} /mscp/scripts/test-in-container.sh)
+		${CE} run --init --rm --sysctl net.ipv6.conf.all.disable_ipv6=0
+		${DOCKER_IMAGE} /mscp/scripts/test-in-container.sh)
 
-	add_custom_target(docker-pkg-${DOCKER_INDEX}
-		COMMENT "Retrieve mscp package from ${DOCKER_IMAGE} container"
-		WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-		COMMAND
-		docker run --rm -v ${CMAKE_BINARY_DIR}:/out ${DOCKER_IMAGE}
-		cp /mscp/build/${PKG_FILE_NAME} /out/)
-
-	list(APPEND DOCKER_BUILDS	docker-build-${DOCKER_INDEX})
-	list(APPEND DOCKER_TESTS	docker-test-${DOCKER_INDEX})
-	list(APPEND DOCKER_PKGS		docker-pkg-${DOCKER_INDEX})
+	list(APPEND DOCKER_BUILDS		docker-build-${DOCKER_INDEX})
+	list(APPEND DOCKER_BUILDS_NO_CACHE	docker-build-${DOCKER_INDEX}-no-cache)
+	list(APPEND DOCKER_TESTS		docker-test-${DOCKER_INDEX})
 endforeach()
 
-add_custom_target(docker-build-all	DEPENDS ${DOCKER_BUILDS})
-add_custom_target(docker-test-all	DEPENDS ${DOCKER_TESTS})
-add_custom_target(docker-pkg-all	DEPENDS ${DOCKER_PKGS})
+add_custom_target(docker-build-all		DEPENDS ${DOCKER_BUILDS})
+add_custom_target(docker-build-all-no-cache	DEPENDS ${DOCKER_BUILDS_NO_CACHE})
+add_custom_target(docker-test-all		DEPENDS ${DOCKER_TESTS})
+
+
+### debuild-related definitions
+
+set(DEBBUILDCONTAINER mscp-build-deb)
+execute_process(
+	COMMAND ${CMAKE_SOURCE_DIR}/scripts/install-build-deps.sh
+	--dont-install --platform Linux-ubuntu
+	OUTPUT_VARIABLE REQUIREDPKGS_DEB
+	OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+add_custom_target(build-deb
+	COMMENT "build mscp deb files inside a container"
+	WORKING_DIRECTORY ${mscp_SOURCE_DIR}
+	BYPRODUCTS ${CMAKE_BINARY_DIR}/debbuild
+	COMMAND
+	${CE} build --build-arg REQUIREDPKGS=${REQUIREDPKGS_DEB}
+	-t ${DEBBUILDCONTAINER} -f Dockerfile/build-deb.Dockerfile .
+	COMMAND
+	${CE} run --rm -v ${CMAKE_BINARY_DIR}:/out ${DEBBUILDCONTAINER}
+	cp -r /debbuild /out/)
+
+
+### rpmbuild-related definitions
+
+# generate files for rpmbuild
+configure_file(
+	${mscp_SOURCE_DIR}/rpm/mscp.spec.in
+	${mscp_SOURCE_DIR}/rpm/mscp.spec
+	@ONLY)
+#configure_file(
+#	${mscp_SOURCE_DIR}/Dockerfile/build-srpm.Dockerfile.in
+#	${mscp_SOURCE_DIR}/Dockerfile/build-srpm.Dockerfile
+#	@ONLY)
+
+# Custom target to build mscp as a src.rpm in docker.
+set(RPMBUILDCONTAINER mscp-build-srpm)
+set(SRPMFILE mscp-${MSCP_VERSION}-1.el9.src.rpm)
+execute_process(
+	COMMAND ${CMAKE_SOURCE_DIR}/scripts/install-build-deps.sh
+	--dont-install --platform Linux-rocky
+	OUTPUT_VARIABLE REQUIREDPKGS_RPM
+	OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+add_custom_target(build-srpm
+	COMMENT "Build mscp src.rpm inside a container"
+	WORKING_DIRECTORY ${mscp_SOURCE_DIR}
+	BYPRODUCTS ${CMAKE_BINARY_DIR}/${SRPMFILE}
+	COMMAND
+	${CE} build --build-arg REQUIREDPKGS=${REQUIREDPKGS_RPM}
+	--build-arg MSCP_VERSION=${MSCP_VERSION}
+	-t ${RPMBUILDCONTAINER} -f Dockerfile/build-srpm.Dockerfile .
+	COMMAND
+	${CE} run --rm -v ${CMAKE_BINARY_DIR}:/out ${RPMBUILDCONTAINER}
+	cp /root/rpmbuild/SRPMS/${SRPMFILE} /out/)
+
+### single-binary-build-related definitions
+
+# Custom target to get single binary mscp
+set(SINGLEBINARYFILE mscp.linux.${CMAKE_SYSTEM_PROCESSOR}.static)
+add_custom_target(build-single-binary
+	COMMENT "Build mscp as a single binary in alpine conatiner"
+	WORKING_DIRECTORY ${mscp_SOURCE_DIR}
+	BYPRODUCTS ${CMAKE_BINARY_DIR}/${SINGLEBINARYFILE}
+	DEPENDS docker-build-alpine-3.19
+	COMMAND
+	${CE} run --rm -v ${CMAKE_BINARY_DIR}:/out mscp-alpine:3.19
+	cp /mscp/build/mscp /out/${SINGLEBINARYFILE})
+
+
+add_custom_target(build-pkg-all
+	DEPENDS build-deb build-srpm build-single-binary)

Dockerfile/README.md

@@ -0,0 +1,7 @@
+
+Dockerfiles for building and testing mscp.
+
+cmake provides custom targets to build and test mscp in the containers
+See `make docker-*` targets. `make docker-build-all` builds all
+container images, and `make docker-test-all` runs the test in all
+container images.

Dockerfile/almalinux-9.3.Dockerfile

@@ -0,0 +1,40 @@
+FROM almalinux:9.3
+
+ARG REQUIREDPKGS
+
+# install pytest, sshd for test, and rpm-build
+RUN set -ex && yum -y install \
+	${REQUIREDPKGS} python3 python3-pip python3-devel \
+	openssh openssh-server openssh-clients rpm-build
+
+RUN python3 -m pip install pytest
+
+
+# preparation for sshd
+RUN mkdir /var/run/sshd        \
+	&& ssh-keygen -A	\
+        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+        && cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN useradd -m -d /home/test test       \
+        && echo "test:userpassword" | chpasswd \
+        && mkdir -p /home/test/.ssh     \
+        && ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase" \
+        && cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+        && chown -R test:test /home/test \
+        && chown -R test:test /home/test/.ssh
+
+RUN rm -rf /run/nologin
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir}			\
+        && rm -rf build			\
+        && cmake -B build		\
+        && cd ${mscpdir}/build          \
+	&& make	-j 2			\
+	&& make install

Dockerfile/alpine-3.19.Dockerfile

@@ -0,0 +1,50 @@
+FROM alpine:3.19
+
+# do not use REQUIREDPKGS build argument because
+# this Dockerfile compiles mscp with conan,so we do not need
+# libssl-dev and zlib-dev
+
+# Build mscp with conan to create single binary mscp
+
+RUN apk add --no-cache \
+	gcc make cmake libc-dev \
+	linux-headers openssh bash perl \
+	python3 py3-pip python3-dev py3-pytest g++
+
+RUN pip3 install --break-system-packages conan
+
+# preparation for sshd
+RUN ssh-keygen -A \
+	&& mkdir /var/run/sshd        \
+	&& ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+	&& cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN addgroup -S test \
+	&& adduser -S test -G test \
+        && echo "test:userpassword" | chpasswd \
+        && mkdir -p /home/test/.ssh     \
+        && ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase" \
+        && cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+        && chown -R test:test /home/test \
+        && chown -R test:test /home/test/.ssh
+
+
+# Build mscp as a single binary
+RUN conan profile detect --force
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+RUN cd ${mscpdir}							\
+	&& rm -rf build							\
+	&& conan install . --output-folder=build --build=missing	\
+	&& cd ${mscpdir}/build						\
+	&& cmake ..							\
+		-DCMAKE_BUILD_TYPE=Release				\
+		-DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake		\
+		-DBUILD_CONAN=ON -DBUILD_STATIC=ON			\
+	&& make	-j 2							\
+	&& make install
+

Dockerfile/build-deb.Dockerfile

@@ -0,0 +1,20 @@
+FROM ubuntu:22.04
+
+ARG REQUIREDPKGS
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
+	${REQUIREDPKGS} ca-certificates \
+	build-essential devscripts debhelper gcc make cmake
+
+ARG mscpdir="/debbuild/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir} 	\
+	&& debuild -us -uc -S \
+	&& mv ${mscpdir} /
+
+# Then all debuild output files exsit at /debbuild
+

Dockerfile/build-srpm.Dockerfile

@@ -0,0 +1,22 @@
+FROM rockylinux:9
+
+ARG REQUIREDPKGS
+ARG MSCP_VERSION
+
+# install pytest, sshd for test, and rpm-build
+RUN set -ex && yum -y install ${REQUIREDPKGS} rpm-build rpmdevtools
+
+ARG mscpdir="/mscp-${MSCP_VERSION}"
+ARG mscptgz="mscp-${MSCP_VERSION}.tar.gz"
+
+COPY . ${mscpdir}
+
+# prepare rpmbuild
+RUN rpmdev-setuptree \
+	&& rm -rf ${mscpdir}/build	\
+	&& tar zcvf /${mscptgz} --exclude-vcs ${mscpdir}	\
+	&& cp /${mscptgz} ~/rpmbuild/SOURCES/	\
+	&& cp ${mscpdir}/rpm/mscp.spec ~/rpmbuild/SPECS/
+
+# build rpm and src.rpm
+RUN rpmbuild -ba ~/rpmbuild/SPECS/mscp.spec

Dockerfile/rocky-8.9.Dockerfile

@@ -0,0 +1,42 @@
+FROM rockylinux:8.9
+
+ARG REQUIREDPKGS
+
+# install pytest, sshd for test, and rpm-build
+RUN set -ex && yum -y install \
+	${REQUIREDPKGS}	\
+	python3 python3-pip python3-devel \
+	openssh openssh-server openssh-clients rpm-build
+
+RUN python3 -m pip install pytest
+
+
+# preparation for sshd
+RUN mkdir /var/run/sshd        \
+	&& ssh-keygen -A	\
+        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+        && cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN useradd -m -d /home/test test       \
+        && echo "test:userpassword" | chpasswd \
+        && mkdir -p /home/test/.ssh     \
+        && ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase" \
+        && cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+        && chown -R test:test /home/test \
+        && chown -R test:test /home/test/.ssh
+
+RUN rm -rf /run/nologin
+
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir}			\
+        && rm -rf build			\
+        && cmake -B build		\
+        && cd ${mscpdir}/build          \
+	&& make	-j 2			\
+	&& make install

Dockerfile/rocky-9.3.Dockerfile

@@ -0,0 +1,42 @@
+FROM rockylinux:9.3
+
+ARG REQUIREDPKGS
+
+# install pytest, sshd for test, and rpm-build
+RUN set -ex && yum -y install \
+	${REQUIREDPKGS}	\
+	python3 python3-pip python3-devel \
+	openssh openssh-server openssh-clients rpm-build
+
+RUN python3 -m pip install pytest
+
+
+# preparation for sshd
+RUN mkdir /var/run/sshd        \
+	&& ssh-keygen -A	\
+        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+        && cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN useradd -m -d /home/test test       \
+        && echo "test:userpassword" | chpasswd \
+        && mkdir -p /home/test/.ssh     \
+        && ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase" \
+        && cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+        && chown -R test:test /home/test \
+        && chown -R test:test /home/test/.ssh
+
+RUN rm -rf /run/nologin
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir}			\
+        && rm -rf build			\
+        && cmake -B build		\
+        && cd ${mscpdir}/build          \
+	&& make	-j 2			\
+	&& make install
+

Dockerfile/ubuntu-20.04.Dockerfile

@@ -0,0 +1,38 @@
+FROM ubuntu:20.04
+
+ARG REQUIREDPKGS
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
+	${REQUIREDPKGS} ca-certificates python3 python3-pip python3-dev openssh-server
+
+RUN python3 -m pip install pytest
+
+# preparation for sshd
+RUN mkdir /var/run/sshd        \
+	&& ssh-keygen -A	\
+        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+        && cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN useradd -m -d /home/test test       \
+        && echo "test:userpassword" | chpasswd \
+        && mkdir -p /home/test/.ssh     \
+        && ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase" \
+        && cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+        && chown -R test:test /home/test \
+        && chown -R test:test /home/test/.ssh
+
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir}			\
+	&& rm -rf build			\
+	&& cmake -B build		\
+	&& cd ${mscpdir}/build		\
+	&& make	-j 2			\
+	&& make install
+

Dockerfile/ubuntu-22.04.Dockerfile

@@ -0,0 +1,37 @@
+FROM ubuntu:22.04
+
+ARG REQUIREDPKGS
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
+	${REQUIREDPKGS} ca-certificates python3 python3-pip python3-dev openssh-server
+
+RUN python3 -m pip install pytest
+
+# preparation for sshd
+RUN mkdir /var/run/sshd        \
+	&& ssh-keygen -A	\
+	&& ssh-keygen -f /root/.ssh/id_rsa -N ""                \
+	&& cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
+
+# create test user
+RUN useradd -m -d /home/test test	\
+	&& echo "test:userpassword" | chpasswd \
+	&& mkdir -p /home/test/.ssh	\
+	&& ssh-keygen -f /home/test/.ssh/id_rsa_test -N "keypassphrase"	\
+	&& cat /home/test/.ssh/id_rsa_test.pub >> /home/test/.ssh/authorized_keys \
+	&& chown -R test:test /home/test \
+	&& chown -R test:test /home/test/.ssh
+
+
+ARG mscpdir="/mscp"
+
+COPY . ${mscpdir}
+
+# build
+RUN cd ${mscpdir}			\
+	&& rm -rf build			\
+	&& cmake -B build		\
+	&& cd ${mscpdir}/build		\
+	&& make	-j 2			\
+	&& make install

Doxyfile

@@ -9,5 +9,5 @@ GENERATE_MAN	= NO
 
 SOURCE_BROWSER	= YES
 
-INPUT	= src include mscp
+INPUT	= src include
 

README.md

@@ -1,32 +1,41 @@
 # mscp: multi-threaded scp
 
-[![build on ubuntu](https://github.com/upa/mscp/actions/workflows/build-ubuntu.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/build-ubuntu.yml) [![build on macOS](https://github.com/upa/mscp/actions/workflows/build-macos.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/build-macos.yml) [![test](https://github.com/upa/mscp/actions/workflows/test.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/test.yml)
+[![build on ubuntu](https://github.com/upa/mscp/actions/workflows/build-ubuntu.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/build-ubuntu.yml)
+[![build on macOS](https://github.com/upa/mscp/actions/workflows/build-macos.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/build-macos.yml)
+[![build on FreeBSD](https://github.com/upa/mscp/actions/workflows/build-freebsd.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/build-freebsd.yml)
+[![test](https://github.com/upa/mscp/actions/workflows/test.yml/badge.svg)](https://github.com/upa/mscp/actions/workflows/test.yml)
 
 
-`mscp`, a variant of `scp`, copies files over multiple ssh (SFTP)
-connections. Multiple threads and connections in mscp transfer (1)
-multiple files simultaneously and (2) a large file in parallel. It
-would shorten the waiting time for transferring a lot of/large files
-over networks.
 
-You can use `mscp` like `scp`, for example, `mscp
-user@example.com:srcfile /tmp/dstfile`. Remote hosts only need to run
-standard `sshd` supporting the SFTP subsystem (e.g. openssh-server),
-and you need to be able to ssh to the hosts as usual. `mscp` does not
-require anything else.
+`mscp`, a variant of `scp`, copies files over multiple SSH (SFTP)
+connections by multiple threads. It enables transferring (1) multiple
+files simultaneously and (2) a large file in parallel, reducing the
+transfer time for a lot of/large files over networks.
 
-https://user-images.githubusercontent.com/184632/206889149-7cc6178a-6f0f-41e6-855c-d25e15a9abc5.mp4
+You can use `mscp` like `scp`, for example:
+
+```shell-session
+$ mscp user@example.com:srcfile /tmp/dstfile
+```
+
+Remote hosts only need to run standard `sshd` supporting the SFTP
+subsystem (e.g. openssh-server), and you need to be able to ssh to the
+hosts as usual. `mscp` does not require anything else.
+
+
+https://github.com/upa/mscp/assets/184632/19230f57-be7f-4ef0-98dd-cb4c460f570d
 
 --------------------------------------------------------------------
 
 Differences from `scp` on usage:
 
-- remote glob on remote shell expansion is not supported.
-- remote to remote copy is not supported.
+- Remote-to-remote copy is not supported.
 - `-r` option is not needed to transfer directories.
+- Checkpointing for resuming failed transfer is supported.
 - and any other differences I have not implemented and noticed.
 
-
+Paper:
+- Ryo Nakamura and Yohei Kuga. 2023. Multi-threaded scp: Easy and Fast File Transfer over SSH. In Practice and Experience in Advanced Research Computing (PEARC '23). Association for Computing Machinery, New York, NY, USA, 320–323. https://doi.org/10.1145/3569951.3597582
 
 ## Install
 
@@ -36,43 +45,35 @@ Differences from `scp` on usage:
 brew install upa/tap/mscp
 ```
 
-- Ubuntu 22.04
+- Ubuntu
 ```console
-wget https://github.com/upa/mscp/releases/latest/download/mscp_ubuntu-22.04-x86_64.deb
-apt-get install -f ./mscp_ubuntu-22.04-x86_64.deb
+sudo add-apt-repository ppa:upaa/mscp
+sudo apt-get install mscp
 ```
 
-- Ubuntu 20.04
+- RHEL-based distributions
 ```console
-wget https://github.com/upa/mscp/releases/latest/download/mscp_ubuntu-20.04-x86_64.deb
-apt-get install -f ./mscp_ubuntu-20.04-x86_64.deb
+sudo dnf copr enable upaaa/mscp
+sudo dnf install mscp
 ```
 
-- Rocky 8.8
+- Single binary `mscp` for x86_64 (not optimal performance)
 ```console
-yum install https://github.com/upa/mscp/releases/latest/download/mscp_rocky-8.8-x86_64.rpm
-```
-
-- Alma 8.8
-```console
-yum install https://github.com/upa/mscp/releases/latest/download/mscp_almalinux-8.8-x86_64.rpm
-```
-
-- Linux with single binary `mscp` (x86_64 only)
-```console
-wget https://github.com/upa/mscp/releases/latest/download/mscp.linux.x86.static -O /usr/local/bin/mscp
+wget https://github.com/upa/mscp/releases/latest/download/mscp.linux.x86_64.static -O /usr/local/bin/mscp
 chmod 755 /usr/local/bin/mscp
 ```
 
 
 ## Build
 
-mscp depends on a patched [libssh](https://www.libssh.org/).  The
+mscp depends on a patched [libssh](https://www.libssh.org/). The
 patch introduces asynchronous SFTP Write, which is derived from
 https://github.com/limes-datentechnik-gmbh/libssh (see [Re: SFTP Write
 async](https://archive.libssh.org/libssh/2020-06/0000004.html)).
 
-Currently macOS and Linux (Ubuntu, Rocky and Alma) are supported.
+We test building mscp on Linux (Ubuntu, Rocky, Alma, and Alpine),
+macOS, and FreeBSD.
+
 
 ```console
 # clone this repository
@@ -81,7 +82,7 @@ cd mscp
 
 # prepare patched libssh
 git submodule update --init
-patch -d libssh -p1 < patch/libssh-0.10.4.patch
+patch -d libssh -p1 < patch/$(git --git-dir=./libssh/.git describe).patch
 
 # install build dependency
 bash ./scripts/install-build-deps.sh
@@ -99,104 +100,12 @@ make
 # install the mscp binary to CMAKE_INSTALL_PREFIX/bin (usually /usr/local/bin)
 make install
 ```
+
 Source tar balls (`mscp-X.X.X.tar.gz`, not `Source code`) in
 [Releases page](https://github.com/upa/mscp/releases) contains the patched version
 of libssh. So you can start from cmake with it.
 
-## Run
 
-- Usage
+## Documentation
 
-```console
-$ mscp
-mscp v0.0.8: copy files over multiple ssh connections
-
-Usage: mscp [vqDHdNh] [-n nr_conns] [-m coremask] [-u max_startups]
-            [-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]
-            [-l login_name] [-p port] [-i identity_file]
-            [-c cipher_spec] [-M hmac_spec] [-C compress] source ... target
-```
-
-- Example: copy a 15GB file on memory over a 100Gbps link
-  - Two Intel Xeon Gold 6130 machines directly connected with Intel E810 100Gbps NICs.
-  - Default `openssh-server` runs on the remote host.
-
-```console
-$ mscp /var/ram/test.img 10.0.0.1:/var/ram/
-[======================================] 100%   15GB/15GB    1.7GB/s  00:00 ETA
-```
-
-```console
-# with some optimizations. top speed reaches 3.0GB/s.
-$ mscp -n 5 -m 0x1f -c aes128-gcm@openssh.com /var/ram/test.img 10.0.0.1:/var/ram/
-[======================================] 100%   15GB/15GB    2.4GB/s  00:00 ETA
-```
-
-- `-v` option increments verbose output level.
-
-```console
-$ mscp test 10.0.0.1:
-[=======================================] 100%   49B /49B   198.8B/s   00:00 ETA
-```
-
-```console
-$ mscp -vv test 10.0.0.1:
-file: test/test1 -> ./test/test1
-file: test/testdir/asdf -> ./test/testdir/asdf
-file: test/testdir/qwer -> ./test/testdir/qwer
-file: test/test2 -> ./test/test2
-we have only 4 chunk(s). set number of connections to 4
-connecting to localhost for a copy thread...
-connecting to localhost for a copy thread...
-connecting to localhost for a copy thread...
-copy start: test/test1
-copy start: test/test2
-copy start: test/testdir/asdf
-copy start: test/testdir/qwer
-copy done: test/test1
-copy done: test/test2
-copy done: test/testdir/qwer
-copy done: test/testdir/asdf
-[=======================================] 100%   49B /49B   198.1B/s   00:00 ETA
-```
-
-- Full usage
-
-```console
-$ mscp -h
-mscp v0.0.8: copy files over multiple ssh connections
-
-Usage: mscp [vqDHdNh] [-n nr_conns] [-m coremask] [-u max_startups]
-            [-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]
-            [-l login_name] [-p port] [-i identity_file]
-            [-c cipher_spec] [-M hmac_spec] [-C compress] source ... target
-
-    -n NR_CONNECTIONS  number of connections (default: floor(log(cores)*2)+1)
-    -m COREMASK        hex value to specify cores where threads pinned
-    -u MAX_STARTUPS    number of concurrent outgoing connections (default: 8)
-    -s MIN_CHUNK_SIZE  min chunk size (default: 64MB)
-    -S MAX_CHUNK_SIZE  max chunk size (default: filesize/nr_conn)
-
-    -a NR_AHEAD        number of inflight SFTP commands (default: 32)
-    -b BUF_SZ          buffer size for i/o and transfer
-
-    -v                 increment verbose output level
-    -q                 disable output
-    -D                 dry run. check copy destinations with -vvv
-    -r                 no effect
-
-    -l LOGIN_NAME      login name
-    -p PORT            port number
-    -i IDENTITY        identity file for public key authentication
-    -c CIPHER          cipher spec
-    -M HMAC            hmac spec
-    -C COMPRESS        enable compression: yes, no, zlib, zlib@openssh.com
-    -H                 disable hostkey check
-    -d                 increment ssh debug output level
-    -N                 enable Nagle's algorithm (default disabled)
-    -h                 print this help
-```
-
-
-Note: mscp is still under development, and the author is not
-responsible for any accidents due to mscp.
+[manpage](/doc/mscp.rst) is available.

VERSION

@@ -1 +1 @@
-0.0.9
+0.1.5

cmake/modules/FindGSSAPI.cmake

@@ -1,325 +0,0 @@
-# - Try to find GSSAPI
-# Once done this will define
-#
-#  KRB5_CONFIG - Path to krb5-config
-#  GSSAPI_ROOT_DIR - Set this variable to the root installation of GSSAPI
-#
-# Read-Only variables:
-#  GSSAPI_FLAVOR_MIT - set to TURE if MIT Kerberos has been found
-#  GSSAPI_FLAVOR_HEIMDAL - set to TRUE if Heimdal Keberos has been found
-#  GSSAPI_FOUND - system has GSSAPI
-#  GSSAPI_INCLUDE_DIR - the GSSAPI include directory
-#  GSSAPI_LIBRARIES - Link these to use GSSAPI
-#  GSSAPI_DEFINITIONS - Compiler switches required for using GSSAPI
-#
-#=============================================================================
-#  Copyright (c) 2013 Andreas Schneider <asn@cryptomilk.org>
-#
-#  Distributed under the OSI-approved BSD License (the "License");
-#  see accompanying file Copyright.txt for details.
-#
-#  This software is distributed WITHOUT ANY WARRANTY; without even the
-#  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-#  See the License for more information.
-#=============================================================================
-#
-
-find_path(GSSAPI_ROOT_DIR
-    NAMES
-        include/gssapi.h
-        include/gssapi/gssapi.h
-    HINTS
-        ${_GSSAPI_ROOT_HINTS}
-    PATHS
-        ${_GSSAPI_ROOT_PATHS}
-)
-mark_as_advanced(GSSAPI_ROOT_DIR)
-
-if (UNIX)
-    find_program(KRB5_CONFIG
-        NAMES
-            krb5-config
-        PATHS
-            ${GSSAPI_ROOT_DIR}/bin
-            /opt/local/bin)
-    mark_as_advanced(KRB5_CONFIG)
-
-    if (KRB5_CONFIG)
-        # Check if we have MIT KRB5
-        execute_process(
-            COMMAND
-                ${KRB5_CONFIG} --vendor
-            RESULT_VARIABLE
-                _GSSAPI_VENDOR_RESULT
-            OUTPUT_VARIABLE
-                _GSSAPI_VENDOR_STRING)
-
-        if ((_GSSAPI_VENDOR_STRING MATCHES ".*Massachusetts.*") OR (_GSSAPI_VENDOR_STRING
-                        MATCHES ".*MITKerberosShim.*"))
-            set(GSSAPI_FLAVOR_MIT TRUE)
-        else()
-            execute_process(
-                COMMAND
-                    ${KRB5_CONFIG} --libs gssapi
-                RESULT_VARIABLE
-                    _GSSAPI_LIBS_RESULT
-                OUTPUT_VARIABLE
-                    _GSSAPI_LIBS_STRING)
-
-            if (_GSSAPI_LIBS_STRING MATCHES ".*roken.*")
-                set(GSSAPI_FLAVOR_HEIMDAL TRUE)
-            endif()
-        endif()
-
-        # Get the include dir
-        execute_process(
-            COMMAND
-                ${KRB5_CONFIG} --cflags gssapi
-            RESULT_VARIABLE
-                _GSSAPI_INCLUDE_RESULT
-            OUTPUT_VARIABLE
-                _GSSAPI_INCLUDE_STRING)
-        string(REGEX REPLACE "(\r?\n)+$" "" _GSSAPI_INCLUDE_STRING "${_GSSAPI_INCLUDE_STRING}")
-        string(REGEX REPLACE " *-I" "" _GSSAPI_INCLUDEDIR "${_GSSAPI_INCLUDE_STRING}")
-    endif()
-
-    if (NOT GSSAPI_FLAVOR_MIT AND NOT GSSAPI_FLAVOR_HEIMDAL)
-        # Check for HEIMDAL
-        find_package(PkgConfig)
-        if (PKG_CONFIG_FOUND)
-            pkg_check_modules(_GSSAPI heimdal-gssapi)
-        endif (PKG_CONFIG_FOUND)
-
-        if (_GSSAPI_FOUND)
-            set(GSSAPI_FLAVOR_HEIMDAL TRUE)
-        else()
-            find_path(_GSSAPI_ROKEN
-                NAMES
-                    roken.h
-                PATHS
-                    ${GSSAPI_ROOT_DIR}/include
-                    ${_GSSAPI_INCLUDEDIR})
-            if (_GSSAPI_ROKEN)
-                set(GSSAPI_FLAVOR_HEIMDAL TRUE)
-            endif()
-        endif ()
-    endif()
-endif (UNIX)
-
-find_path(GSSAPI_INCLUDE_DIR
-    NAMES
-        gssapi.h
-        gssapi/gssapi.h
-    PATHS
-        ${GSSAPI_ROOT_DIR}/include
-        ${_GSSAPI_INCLUDEDIR}
-)
-
-if (GSSAPI_FLAVOR_MIT)
-    find_library(GSSAPI_LIBRARY
-        NAMES
-            gssapi_krb5
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(KRB5_LIBRARY
-        NAMES
-            krb5
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(K5CRYPTO_LIBRARY
-        NAMES
-            k5crypto
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(COM_ERR_LIBRARY
-        NAMES
-            com_err
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    if (GSSAPI_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${GSSAPI_LIBRARY}
-        )
-    endif (GSSAPI_LIBRARY)
-
-    if (KRB5_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${KRB5_LIBRARY}
-        )
-    endif (KRB5_LIBRARY)
-
-    if (K5CRYPTO_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${K5CRYPTO_LIBRARY}
-        )
-    endif (K5CRYPTO_LIBRARY)
-
-    if (COM_ERR_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${COM_ERR_LIBRARY}
-        )
-    endif (COM_ERR_LIBRARY)
-endif (GSSAPI_FLAVOR_MIT)
-
-if (GSSAPI_FLAVOR_HEIMDAL)
-    find_library(GSSAPI_LIBRARY
-        NAMES
-            gssapi
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(KRB5_LIBRARY
-        NAMES
-            krb5
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(HCRYPTO_LIBRARY
-        NAMES
-            hcrypto
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(COM_ERR_LIBRARY
-        NAMES
-            com_err
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(HEIMNTLM_LIBRARY
-        NAMES
-            heimntlm
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(HX509_LIBRARY
-        NAMES
-            hx509
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(ASN1_LIBRARY
-        NAMES
-            asn1
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(WIND_LIBRARY
-        NAMES
-            wind
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    find_library(ROKEN_LIBRARY
-        NAMES
-            roken
-        PATHS
-            ${GSSAPI_ROOT_DIR}/lib
-            ${_GSSAPI_LIBDIR}
-    )
-
-    if (GSSAPI_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${GSSAPI_LIBRARY}
-        )
-    endif (GSSAPI_LIBRARY)
-
-    if (KRB5_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${KRB5_LIBRARY}
-        )
-    endif (KRB5_LIBRARY)
-
-    if (HCRYPTO_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${HCRYPTO_LIBRARY}
-        )
-    endif (HCRYPTO_LIBRARY)
-
-    if (COM_ERR_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${COM_ERR_LIBRARY}
-        )
-    endif (COM_ERR_LIBRARY)
-
-    if (HEIMNTLM_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${HEIMNTLM_LIBRARY}
-        )
-    endif (HEIMNTLM_LIBRARY)
-
-    if (HX509_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${HX509_LIBRARY}
-        )
-    endif (HX509_LIBRARY)
-
-    if (ASN1_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${ASN1_LIBRARY}
-        )
-    endif (ASN1_LIBRARY)
-
-    if (WIND_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${WIND_LIBRARY}
-        )
-    endif (WIND_LIBRARY)
-
-    if (ROKEN_LIBRARY)
-        set(GSSAPI_LIBRARIES
-            ${GSSAPI_LIBRARIES}
-            ${WIND_LIBRARY}
-        )
-    endif (ROKEN_LIBRARY)
-endif (GSSAPI_FLAVOR_HEIMDAL)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(GSSAPI DEFAULT_MSG GSSAPI_LIBRARIES GSSAPI_INCLUDE_DIR)
-
-if (GSSAPI_INCLUDE_DIRS AND GSSAPI_LIBRARIES)
-    set(GSSAPI_FOUND TRUE)
-endif (GSSAPI_INCLUDE_DIRS AND GSSAPI_LIBRARIES)
-
-# show the GSSAPI_INCLUDE_DIRS and GSSAPI_LIBRARIES variables only in the advanced view
-mark_as_advanced(GSSAPI_INCLUDE_DIRS GSSAPI_LIBRARIES)

debian/.gitignore

@@ -0,0 +1,11 @@
+
+/.debhelper/
+/*/
+!/tests/
+!/source
+
+/*.log
+/*.substvars
+/*.debhelper
+/files
+/mscp

debian/changelog

@@ -0,0 +1,42 @@
+mscp (0.1.5) UNRELEASED; urgency=medium
+
+  * add support for resuming failed transfer (#5 and #10)
+  * remove the list structure derived from the linux kernel and refactoring
+    for this change.
+  * add and fix test cases (changing port number and number of connections)
+
+ -- Ryo Nakamura <upa@haeena.net>  Thu, 14 Mar 2024 12:51:23 +0900
+
+mscp (0.1.4) unstable; urgency=medium
+
+  * add a test for builds on FreeBSD
+  * updat container images for tests
+  * dropp support for Python bindings
+  * clean up error message handling
+  * add MSCP_SSH_AUTH_PASSWORD/PASSPHRASE environment variables
+    to pass passwords to MSCP without interactive input (issue #9)
+  * add a -p option to preserve timestamps
+  * add -4 and -6 options to use IPv4 or IPv6, respectively
+  * introduc .clang-format, which is derived from the Linux kernel
+  * fix the manpage
+
+ -- Ryo Nakamura <upa@haeena.net>  Wed, 07 Feb 2024 15:56:58 +0900
+
+mscp (0.1.3) unstable; urgency=medium
+
+  * add -I option for inserting intervals between SSH attempts (issue #7)
+  * add -P option, equivalent to -p (just for compatibility)
+  * update libssh to 0.10.6-2-g6f1b1e76 for security fixes
+  * cleanup warning messages when scanning source files fails
+  * fix wrong destination paths for source paths under '/' (issue #8)
+  * reduce memory footprint for coping many (e.g., over 100k) files (issue #8)
+  * add SPDX-License-Identifer to the source files
+  * add manpage
+
+ -- Ryo Nakamura <upa@haeena.net>  Fri, 12 Jan 2024 22:20:24 +0900
+
+mscp (0.1.2) unstable; urgency=medium
+
+  * Initial release for debian packaging
+
+ -- Ryo Nakamura <upa@haeena.net>  Sun, 10 Dec 2023 21:51:49 +0900

debian/compat

@@ -0,0 +1 @@
+10

debian/control

@@ -0,0 +1,17 @@
+Source: mscp
+Section: net
+Priority: optional
+Maintainer: Ryo Nakamura <upa@haeena.net>
+Build-Depends: debhelper (>= 10~), cmake, zlib1g-dev, libssl-dev, libkrb5-dev
+Homepage: https://github.com/upa/mscp
+Standards-Version: 4.5.0.3
+
+
+Package: mscp
+Architecture: linux-any
+Depends: ${misc:Depends}, ${shlibs:Depends}
+Description: mscp, fast file transfer over multiple SSH connections
+ mscp transfers files over multiple SSH connections. Multiple threads
+ and connections in mscp transfer (1) multiple files simultaneously
+ and (2) a large file in parallel. It would shorten the waiting time
+ for transferring a lot of/large files over networks.

debian/copyright

@@ -0,0 +1,12 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: https://github.com/upa/mscp
+Upstream-Name: mscp
+Upstream-Contact: Ryo Nakamura <upa@haeena.net>
+
+Files: *
+Copyright: Ryo Nakamura
+License: GPL-3
+
+Files: src/list.h
+Copyright: kazutomo@mcs.anl.gov
+License: GPL

debian/rules

@@ -0,0 +1,9 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+
+override_dh_auto_test:
+
+

debian/source/format

@@ -0,0 +1 @@
+3.0 (native)

doc/RELEASE.md

@@ -0,0 +1,72 @@
+
+
+## Build mscp as deb package
+
+`make build-deb` produces a mscp deb package and related files. This
+target builds mscp with `debuild` inside a docker container
+(Dockerfile is `docker/build-deb.Docerfile`).
+
+
+```console
+mkdir build && cd build && cmake ..
+make build-deb
+```
+
+After that:
+
+```console
+$ ls debbuild
+mscp_0.1.4.dsc		 mscp_0.1.4_source.buildinfo  mscp_0.1.4.tar.xz
+mscp_0.1.4_source.build  mscp_0.1.4_source.changes
+```
+
+### To publush mscp in launchpad PPA:
+
+1. write changes in `debian/changelog` at main branch (the date command needed here is `date -R`)
+2. switch to `ppa-focal` or `ppa-jammy` branch
+3. rebase to the `main` branch and modify `debian/changes`:
+   * change `UNRELEASED` to the release name (`focal` or `jammy`).
+4. run `make build-deb` at the build directory and `cd debbuild`
+5. sign the files with `debsign -k [GPGKEYID] mscp_X.X.X~X_source.changes`
+5. upload the files with `dput ppa:upaa/mscp mscp_X.X.X~X_source.changes`
+
+
+## Build mscp as (source) rpm package
+
+`make build-srpm` produces a mscp src.rpm package. This target builts
+mscp with `rpmbuild` inside a docker container (Dockerfile is
+`docker/build-srpm.Dockerfile`, generated from
+`build-srpm.Dockerfile.in` by cmake).
+
+```console
+mkdir build && cd build && cmake ..
+make build-srpm
+```
+
+After that:
+
+```console
+$ ls *.rpm
+mscp-0.1.3-1.el9.src.rpm
+```
+
+### To publish mscp in COPR:
+
+1. update `rpm/mscp.spec.in`, the `changelog` section (the date
+   command needed here is `date "+%a %b %d %Y"`)
+2. run `make build-srpm`
+3. download `mscp-X.X.X-1.yyy.src.rpm`
+4. upload the src.rpm to Build page at COPR.
+
+
+
+## Update Document
+
+The docuemnt is `doc/mscp.rst` (at present). When `mscp.1.in` is
+modified, run `make update-rst` to make it up to date.
+
+```console
+mkdir build cd build && cmake ..
+make update-rst
+```
+

doc/mscp.1.in

@@ -0,0 +1,414 @@
+.TH MSCP 1 "@MSCP_BUILD_VERSION@" "mscp" "User Commands"
+
+.SH NAME
+mscp \- copy files over multiple SSH connections
+
+.SH SYNOPSIS
+
+.B mscp
+.RB [ \-46vqDpHdNh ]
+[\c
+.BI \-n \ NR_CONNECTIONS\c
+]
+[\c
+.BI \-m \ COREMASK\c
+]
+[\c
+.BI \-u \ MAX_STARTUPS\c
+]
+[\c
+.BI \-I \ INTERVAL\c
+]
+[\c
+.BI \-W \ CHECKPOINT\c
+]
+[\c
+.BI \-R \ CHECKPOINT\c
+]
+[\c
+.BI \-s \ MIN_CHUNK_SIZE\c
+]
+[\c
+.BI \-S \ MAX_CHUNK_SIZE\c
+]
+[\c
+.BI \-a \ NR_AHEAD\c
+]
+[\c
+.BI \-b \ BUF_SIZE\c
+]
+[\c
+.BI \-l \ LOGIN_NAME\c
+]
+[\c
+.BI \-P \ PORT\c
+]
+[\c
+.BI \-F \ CONFIG\c
+]
+[\c
+.BI \-i \ IDENTITY\c
+]
+[\c
+.BI \-c \ CIPHER\c
+]
+[\c
+.BI \-M \ HMAC\c
+]
+[\c
+.BI \-C \ COMPRESS\c
+]
+[\c
+.BI \-g \ CONGESTION\c
+]
+.I source ... target
+
+.SH DESCRIPTION
+
+.PP
+.B mscp
+copies files over multiple SSH (SFTP) connections by multiple
+threads. It enables transferring (1) multiple files simultaneously and
+(2) a large file in parallel, reducing the transfer time for a lot
+of/large files over networks.
+
+.PP
+The usage of
+.B mscp
+imitates the
+.B scp
+command of
+.I OpenSSH,
+for example:
+
+.nf
+    $ mscp srcfile user@example.com:dstfile
+.fi
+
+Remote hosts only need to run standard
+.B sshd
+supporting the SFTP subsystem, and users need to be able to
+.B ssh
+to the hosts as usual.
+.B mscp
+does not require anything else.
+
+.PP
+.B mscp
+uses
+.UR https://\:www\:.libssh\:.org
+libssh
+.UE
+as its SSH implementation. Thus, supported SSH features, for example,
+authentication, encryption, and various options in ssh_config, follow
+what
+.I libssh
+supports.
+
+.SH OPTIONS
+.TP
+.B \-n \fINR_CONNECTIONS\fR
+Specifies the number of SSH connections. The default value is
+calculated from the number of CPU cores on the host with the following
+formula: floor(log(nr_cores)*2)+1.
+
+.TP
+.B \-m \fICOREMASK\fR
+Configures CPU cores to be used by the hexadecimal bitmask.  All CPU
+cores are used by default.
+
+.TP
+.B \-u \fIMAX_STARTUPS\fR
+Specifies the number of concurrent outgoing SSH connections.
+.B sshd
+limits the number of simultaneous SSH connection attempts by
+.I MaxStartups
+in
+.I sshd_config.
+The default
+.I MaxStartups
+is 10; thus, we set the default MAX_STARTUPS 8.
+
+.TP
+.B \-I \fIINTERVAL\fR
+Specifies the interval (in seconds) between SSH connection
+attempts. Some firewall products treat SSH connection attempts from a
+single source IP address for a short period as a brute force attack.
+This option inserts intervals between the attempts to avoid being
+determined as an attack. The default value is 0.
+
+.TP
+.B \-W \fICHECKPOINT\fR
+Specifies a checkpoint file to save the state of a failed
+transfer. When transferring fails due to, for example, connection
+disruption or user interrupt,
+.B mscp
+writes the information about the remaining files and chunks to the
+specified checkpoint file.
+.B \-W
+option with
+.B \-D
+(dry-run mode) only writes a checkpoint file and exits.
+
+
+.TP
+.B \-R \fICHECKPOINT\fR
+Specifies a checkpoint file to resume a transfer. When a checkpoint
+file is passed,
+.B mscp
+reads the checkpoint to load a remote host, copy direction, and files
+and their chunks to be transferred. Namely,
+.B mscp
+can resume a past failed transfer from the checkpoint. Resuming with a
+checkpoint does not require
+.I source ... target
+arguments. Other SSH connection options, such as port number and
+config file, should be specified as with the failed run. In addition,
+checkpoint files have file paths as relative paths. Thus, you must run
+.B mscp
+in the same working directory as the failed run. You can see the
+contents of a checkpoint file with the
+.B mscp \-vv \-D \-R CHECKPOINT
+command (Dry-run mode).  Note that the checkpoint file is not
+automatically removed after the resumed transfer ends
+successfully. Users should check the return value of
+.B mscp
+and remove the checkpoint if it returns 0.
+
+
+.TP
+.B \-s \fIMIN_CHUNK_SIZE\fR
+Specifies the minimum chunk size.
+.B mscp
+divides a file into chunks and copies the chunks in parallel.
+
+.TP
+.B \-S \fIMAX_CHUNK_SIZE\fR
+Specifies the maximum chunk size. The default is file size divided by
+the number of connections.
+
+.TP
+.B \-a \fINR_AHEAD\fR
+Specifies the number of inflight SFTP commands. The default value is
+32.
+
+.TP
+.B \-b \fIBUF_SIZE\fR
+Specifies the buffer size for I/O and transfer over SFTP. The default
+value is 16384. Note that the SSH specification restricts buffer size
+delivered over SSH. Changing this value is not recommended at present.
+
+.TP
+.B \-4
+Uses IPv4 addresses only.
+
+.TP
+.B \-6
+Uses IPv6 addresses only.
+
+.TP
+.B \-v
+Increments the verbose output level.
+
+.TP
+.B \-q
+Quiet mode: turns off all outputs.
+
+.TP
+.B \-D
+Dry-run mode: it scans source files to be copied, calculates chunks,
+resolves destination file paths, and exits. Dry-run mode with
+.B -vv
+option can confirm files to be copied and their destination paths.
+
+.TP
+.B \-r
+No effect.
+.B mscp
+copies recursively if a source path is a directory. This option exists
+for just compatibility.
+
+.TP
+.B \-l \fILOGIN_NAME\fR
+Specifies the username to log in on the remote machine as with
+.I ssh(1).
+
+.TP
+.B \-P \fIPORT\fR
+Specifies the port number to connect to on the remote machine as with
+ssh(1) and scp(1).
+
+.TP
+.B \-F \fICONFIG\fR
+Specifies an alternative per-user ssh configuration file. Note that
+acceptable options in the configuration file are what
+.I libssh
+supports.
+
+.TP
+.B \-i \fIIDENTITY\fR
+Specifies the identity file for public key authentication.
+
+.TP
+.B \-c \fICIPHER\fR
+Selects the cipher to use for encrypting the data transfer. See
+.UR https://\:www\:.libssh\:.org/\:features/
+libssh features
+.UE .
+
+.TP
+.B \-M \fIHMAC\fR
+Specifies MAC hash algorithms. See
+.UR https://\:www\:.libssh\:.org/\:features/
+libssh features
+.UE .
+
+.TP
+.B \-C \fICOMPRESS\fR
+Enables compression: yes, no, zlib, zlib@openssh.com. The default is
+none. See
+.UR https://\:www\:.libssh\:.org/\:features/
+libssh features
+.UE .
+
+.TP
+.B \-g \fICONGESTION\fR
+Specifies the TCP congestion control algorithm to use (Linux only).
+
+.TP
+.B \-p
+Preserves modification times and access times (file mode bits are
+preserved by default).
+
+.TP
+.B \-H
+Disables hostkey checking.
+
+.TP
+.B \-d
+Increments the ssh debug output level.
+
+.TP
+.B \-N
+Enables Nagle's algorithm. It is disabled by default.
+
+.TP
+.B \-h
+Prints help.
+
+.SH EXIT STATUS
+Exit status is 0 on success,  and >0 if an error occurs.
+
+.SH ENVIRONMENT
+
+.PP
+.B mscp
+recognizes the following environment variables.
+
+.TP
+.B MSCP_SSH_AUTH_PASSWORD
+This environment variable passes a password for password
+authentication to establish SSH connections.
+
+.TP
+.B MSCP_SSH_AUTH_PASSPHRASE
+This environment variable passes a passphrase for public-key
+authentication for establishing SSH connections.
+
+
+
+.SH NOTES
+
+.PP
+.B mscp
+uses glob(3) for globbing pathnames, including matching patterns for
+local and remote paths. However, globbing on the
+.I remote
+side does not work with musl libc (used in Alpine Linux and the
+single-binary version of mscp) because musl libc does not support
+GLOB_ALTDIRFUNC.
+
+.PP
+.B mscp
+does not support remote-to-remote copy, which
+.B scp
+supports.
+
+.SH EXAMPLES
+
+.PP
+Copy a local file to a remote host with different name:
+
+.nf
+    $ mscp ~/src-file 10.0.0.1:copied-file
+.fi
+
+.PP
+Copy a local file and a directory to /tmp at a remote host:
+
+.nf
+    $ mscp ~/src-file dir1 10.0.0.1:/tmp
+.fi
+
+.PP
+Save a checkpoint if transfer fails:
+
+.nf
+    $ mscp -W mscp.checkpoint many-large-files 10.0.0.1:dst/
+.fi
+
+.PP
+Check the remaining files and chunks, and resume the failed transfer:
+
+.nf
+    # Dump the content of a checkpoint and exit (dry-run mode)
+    $ mscp -vv -D -R mscp.checkpoint
+
+    # resume transferring from the checkpoint
+    $ mscp -R mscp.checkpoint
+.fi
+
+.PP
+In a long fat network, following options might improve performance:
+
+.nf
+    $ mscp -n 64 -m 0xffff -a 64 -c aes128-gcm@openssh.com src 10.0.0.1:
+.fi
+
+.B -n
+increases the number of SSH connections than default,
+.B -m
+pins threads to specific CPU cores,
+.B -a
+increases asynchronous inflight SFTP WRITE/READ commands, and
+.B -c aes128-gcm@openssh.com
+will be faster than the default chacha20-poly1305 cipher, particularly
+on hosts that support AES-NI.
+
+
+.SH "SEE ALSO"
+.BR scp (1),
+.BR ssh (1),
+.BR sshd (8).
+
+.SH "PAPER REFERENCE"
+
+
+Ryo Nakamura and Yohei Kuga. 2023. Multi-threaded scp: Easy and Fast
+File Transfer over SSH. In Practice and Experience in Advanced
+Research Computing (PEARC '23). Association for Computing Machinery,
+New York, NY, USA, 320–323.
+.UR https://\:doi\:.org/\:10.1145/\:3569951.3597582
+DOI
+.UE .
+
+
+.SH CONTACT INFORMATION
+.PP
+For patches, bug reports, or feature requests, please open an issue on
+.UR https://\:github\:.com/\:upa/\:mscp
+GitHub
+.UE .
+
+.SH AUTHORS
+Ryo Nakamura <upa@haeena.net>

doc/mscp.rst

@@ -0,0 +1,276 @@
+====
+MSCP
+====
+
+:Date:   v0.1.4-28-g0d248c5
+
+NAME
+====
+
+mscp - copy files over multiple SSH connections
+
+SYNOPSIS
+========
+
+**mscp** [**-46vqDpHdNh**] [ **-n**\ *NR_CONNECTIONS* ] [
+**-m**\ *COREMASK* ] [ **-u**\ *MAX_STARTUPS* ] [ **-I**\ *INTERVAL* ] [
+**-W**\ *CHECKPOINT* ] [ **-R**\ *CHECKPOINT* ] [
+**-s**\ *MIN_CHUNK_SIZE* ] [ **-S**\ *MAX_CHUNK_SIZE* ] [
+**-a**\ *NR_AHEAD* ] [ **-b**\ *BUF_SIZE* ] [ **-l**\ *LOGIN_NAME* ] [
+**-P**\ *PORT* ] [ **-F**\ *CONFIG* ] [ **-i**\ *IDENTITY* ] [
+**-c**\ *CIPHER* ] [ **-M**\ *HMAC* ] [ **-C**\ *COMPRESS* ] [
+**-g**\ *CONGESTION* ] *source ... target*
+
+DESCRIPTION
+===========
+
+**mscp** copies files over multiple SSH (SFTP) connections by multiple
+threads. It enables transferring (1) multiple files simultaneously and
+(2) a large file in parallel, reducing the transfer time for a lot
+of/large files over networks.
+
+The usage of **mscp** imitates the **scp** command of *OpenSSH,* for
+example:
+
+::
+
+       $ mscp srcfile user@example.com:dstfile
+
+Remote hosts only need to run standard **sshd** supporting the SFTP
+subsystem, and users need to be able to **ssh** to the hosts as usual.
+**mscp** does not require anything else.
+
+**mscp** uses `libssh <https://www.libssh.org>`__ as its SSH
+implementation. Thus, supported SSH features, for example,
+authentication, encryption, and various options in ssh_config, follow
+what *libssh* supports.
+
+OPTIONS
+=======
+
+**-n NR_CONNECTIONS**
+   Specifies the number of SSH connections. The default value is
+   calculated from the number of CPU cores on the host with the
+   following formula: floor(log(nr_cores)*2)+1.
+
+**-m COREMASK**
+   Configures CPU cores to be used by the hexadecimal bitmask. All CPU
+   cores are used by default.
+
+**-u MAX_STARTUPS**
+   Specifies the number of concurrent outgoing SSH connections. **sshd**
+   limits the number of simultaneous SSH connection attempts by
+   *MaxStartups* in *sshd_config.* The default *MaxStartups* is 10;
+   thus, we set the default MAX_STARTUPS 8.
+
+**-I INTERVAL**
+   Specifies the interval (in seconds) between SSH connection attempts.
+   Some firewall products treat SSH connection attempts from a single
+   source IP address for a short period as a brute force attack. This
+   option inserts intervals between the attempts to avoid being
+   determined as an attack. The default value is 0.
+
+**-W CHECKPOINT**
+   Specifies a checkpoint file to save the state of a failed transfer.
+   When transferring fails due to, for example, connection disruption or
+   user interrupt, **mscp** writes the information about the remaining
+   files and chunks to the specified checkpoint file. **-W** option with
+   **-D** (dry-run mode) only writes a checkpoint file and exits.
+
+**-R CHECKPOINT**
+   Specifies a checkpoint file to resume a transfer. When a checkpoint
+   file is passed, **mscp** reads the checkpoint to load a remote host,
+   copy direction, and files and their chunks to be transferred. Namely,
+   **mscp** can resume a past failed transfer from the checkpoint.
+   Resuming with a checkpoint does not require *source ... target*
+   arguments. Other SSH connection options, such as port number and
+   config file, should be specified as with the failed run. In addition,
+   checkpoint files have file paths as relative paths. Thus, you must
+   run **mscp** in the same working directory as the failed run. You can
+   see the contents of a checkpoint file with the **mscp -vv -D -R
+   CHECKPOINT** command (Dry-run mode). Note that the checkpoint file is
+   not automatically removed after the resumed transfer ends
+   successfully. Users should check the return value of **mscp** and
+   remove the checkpoint if it returns 0.
+
+**-s MIN_CHUNK_SIZE**
+   Specifies the minimum chunk size. **mscp** divides a file into chunks
+   and copies the chunks in parallel.
+
+**-S MAX_CHUNK_SIZE**
+   Specifies the maximum chunk size. The default is file size divided by
+   the number of connections.
+
+**-a NR_AHEAD**
+   Specifies the number of inflight SFTP commands. The default value is
+   32.
+
+**-b BUF_SIZE**
+   Specifies the buffer size for I/O and transfer over SFTP. The default
+   value is 16384. Note that the SSH specification restricts buffer size
+   delivered over SSH. Changing this value is not recommended at
+   present.
+
+**-4**
+   Uses IPv4 addresses only.
+
+**-6**
+   Uses IPv6 addresses only.
+
+**-v**
+   Increments the verbose output level.
+
+**-q**
+   Quiet mode: turns off all outputs.
+
+**-D**
+   Dry-run mode: it scans source files to be copied, calculates chunks,
+   resolves destination file paths, and exits. Dry-run mode with **-vv**
+   option can confirm files to be copied and their destination paths.
+
+**-r**
+   No effect. **mscp** copies recursively if a source path is a
+   directory. This option exists for just compatibility.
+
+**-l LOGIN_NAME**
+   Specifies the username to log in on the remote machine as with
+   *ssh(1).*
+
+**-P PORT**
+   Specifies the port number to connect to on the remote machine as with
+   ssh(1) and scp(1).
+
+**-F CONFIG**
+   Specifies an alternative per-user ssh configuration file. Note that
+   acceptable options in the configuration file are what *libssh*
+   supports.
+
+**-i IDENTITY**
+   Specifies the identity file for public key authentication.
+
+**-c CIPHER**
+   Selects the cipher to use for encrypting the data transfer. See
+   `libssh features <https://www.libssh.org/features/>`__.
+
+**-M HMAC**
+   Specifies MAC hash algorithms. See `libssh
+   features <https://www.libssh.org/features/>`__.
+
+**-C COMPRESS**
+   Enables compression: yes, no, zlib, zlib@openssh.com. The default is
+   none. See `libssh features <https://www.libssh.org/features/>`__.
+
+**-g CONGESTION**
+   Specifies the TCP congestion control algorithm to use (Linux only).
+
+**-p**
+   Preserves modification times and access times (file mode bits are
+   preserved by default).
+
+**-H**
+   Disables hostkey checking.
+
+**-d**
+   Increments the ssh debug output level.
+
+**-N**
+   Enables Nagle's algorithm. It is disabled by default.
+
+**-h**
+   Prints help.
+
+EXIT STATUS
+===========
+
+Exit status is 0 on success, and >0 if an error occurs.
+
+ENVIRONMENT
+===========
+
+**mscp** recognizes the following environment variables.
+
+**MSCP_SSH_AUTH_PASSWORD**
+   This environment variable passes a password for password
+   authentication to establish SSH connections.
+
+**MSCP_SSH_AUTH_PASSPHRASE**
+   This environment variable passes a passphrase for public-key
+   authentication for establishing SSH connections.
+
+NOTES
+=====
+
+**mscp** uses glob(3) for globbing pathnames, including matching
+patterns for local and remote paths. However, globbing on the *remote*
+side does not work with musl libc (used in Alpine Linux and the
+single-binary version of mscp) because musl libc does not support
+GLOB_ALTDIRFUNC.
+
+**mscp** does not support remote-to-remote copy, which **scp** supports.
+
+EXAMPLES
+========
+
+Copy a local file to a remote host with different name:
+
+::
+
+       $ mscp ~/src-file 10.0.0.1:copied-file
+
+Copy a local file and a directory to /tmp at a remote host:
+
+::
+
+       $ mscp ~/src-file dir1 10.0.0.1:/tmp
+
+Save a checkpoint if transfer fails:
+
+::
+
+       $ mscp -W mscp.checkpoint many-large-files 10.0.0.1:dst/
+
+Check the remaining files and chunks, and resume the failed transfer:
+
+::
+
+       # Dump the content of a checkpoint and exit (dry-run mode)
+       $ mscp -vv -D -R mscp.checkpoint
+
+       # resume transferring from the checkpoint
+       $ mscp -R mscp.checkpoint
+
+In a long fat network, following options might improve performance:
+
+::
+
+       $ mscp -n 64 -m 0xffff -a 64 -c aes128-gcm@openssh.com src 10.0.0.1:
+
+**-n** increases the number of SSH connections than default, **-m** pins
+threads to specific CPU cores, **-a** increases asynchronous inflight
+SFTP WRITE/READ commands, and **-c aes128-gcm@openssh.com** will be
+faster than the default chacha20-poly1305 cipher, particularly on hosts
+that support AES-NI.
+
+SEE ALSO
+========
+
+**scp**\ (1), **ssh**\ (1), **sshd**\ (8).
+
+PAPER REFERENCE
+===============
+
+Ryo Nakamura and Yohei Kuga. 2023. Multi-threaded scp: Easy and Fast
+File Transfer over SSH. In Practice and Experience in Advanced Research
+Computing (PEARC '23). Association for Computing Machinery, New York,
+NY, USA, 320–323. `DOI <https://doi.org/10.1145/3569951.3597582>`__.
+
+CONTACT INFORMATION
+===================
+
+For patches, bug reports, or feature requests, please open an issue on
+`GitHub <https://github.com/upa/mscp>`__.
+
+AUTHORS
+=======
+
+Ryo Nakamura <upa@haeena.net>

docker/README.md

@@ -1,37 +0,0 @@
-
-Build docker containers.
-
-```console
-cd ..
-
-docker build -t mscp-ubuntu:20.04 -f docker/ubuntu-20.04.Dockerfile .
-
-docker build -t mscp-ubuntu:22.04 -f docker/ubuntu-22.04.Dockerfile .
-
-docker build -t mscp-rocky:8.8 -f docker/rocky-8.Dockerfile .
-```
-
-Test `mscp` in the containers.
-
-```console
-docker run --init --rm mscp-ubuntu:20.04 /mscp/scripts/test-in-container.sh
-
-docker run --init --rm mscp-ubuntu:22.04 /mscp/scripts/test-in-container.sh
-
-docker run --init --rm mscp-rocky:8.9 /mscp/scripts/test-in-container.sh
-```
-
-Retrieve deb/rpm packages.
-
-```console
-docker run --rm -v (pwd):/out mscp-ubuntu:20.04 \
-       cp /mscp/build/mscp_ubuntu-20.04-x86_64.deb /out/
-
-docker run --rm -v (pwd):/out mscp-ubuntu:22.04 \
-       cp /mscp/build/mscp_ubuntu-22.04-x86_64.deb /out/
-
-docker run --rm -v (pwd):/out mscp-rocky:8.8 \
-       cp /mscp/build/mscp_rocky-8.8-x86_64.rpm /out/
-```
-
-I don't know whether these are good way.

docker/almalinux-8.8.Dockerfile

@@ -1,36 +0,0 @@
-FROM almalinux:8.8
-
-# install pytest, sshd for test, and rpm-build
-RUN set -ex && yum -y install \
-	python3 python3-pip python3-devel openssh openssh-server openssh-clients rpm-build
-
-RUN python3 -m pip install pytest
-
-
-# preparation for sshd
-RUN  mkdir /var/run/sshd        \
-	&& ssh-keygen -A	\
-        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
-        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-
-
-ARG mscpdir="/mscp"
-
-COPY . ${mscpdir}
-
-# install build dependency
-RUN ${mscpdir}/scripts/install-build-deps.sh
-
-# build
-RUN cd ${mscpdir}			\
-        && rm -rf build			\
-        && cmake -B build		\
-        && cd ${mscpdir}/build          \
-	&& make				\
-	&& cpack -G RPM CPackConfig.cmake \
-	&& rpm -iv *.rpm
-
-# install mscp python module
-RUN cd ${mscpdir}	\
-	&& python3 setup.py install --user
-

docker/alpine-3.17.Dockerfile

@@ -1,45 +0,0 @@
-FROM alpine:3.17
-
-# Build mscp with conan to create single binary mscp
-
-RUN apk add --no-cache \
-	gcc make cmake python3 py3-pip perl linux-headers libc-dev	\
-	openssh bash python3-dev g++
-
-RUN pip3 install conan pytest
-
-# preparation for sshd
-RUN ssh-keygen -A
-RUN  mkdir /var/run/sshd        \
-        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
-        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-
-
-# Build mscp as a single binary
-RUN conan profile detect --force
-
-ARG mscpdir="/mscp"
-
-COPY . ${mscpdir}
-
-RUN cd ${mscpdir}							\
-	&& rm -rf build							\
-	&& conan install . --output-folder=build --build=missing	\
-	&& cd ${mscpdir}/build						\
-	&& cmake ..							\
-		-DCMAKE_BUILD_TYPE=Release				\
-		-DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake		\
-		-DBUILD_CONAN=ON -DBUILD_STATIC=ON			\
-	&& make								\
-	&& cp mscp /usr/bin/						\
-	&& cp mscp /mscp/build/mscp_alpine-3.17-x86_64.static
-# copy mscp to PKG FILE NAME because this build doesn't use CPACK
-
-# install mscp python module
-RUN cd ${mscpdir}	\
-	&& python3 setup.py install --user
-
-# Need Fix: A trick putting libmscp.so to python mscp module dir does not work on alpine,
-# so install libmscp.
-RUN cd ${mscpdir}/build	\
-	&& make install

docker/rocky-8.8.Dockerfile

@@ -1,35 +0,0 @@
-FROM rockylinux:8.8
-
-# install pytest, sshd for test, and rpm-build
-RUN set -ex && yum -y install \
-	python3 python3-pip python3-devel openssh openssh-server openssh-clients rpm-build
-
-RUN python3 -m pip install pytest
-
-
-# preparation for sshd
-RUN  mkdir /var/run/sshd        \
-	&& ssh-keygen -A	\
-        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
-        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-
-ARG mscpdir="/mscp"
-
-COPY . ${mscpdir}
-
-# install build dependency
-RUN ${mscpdir}/scripts/install-build-deps.sh
-
-# build
-RUN cd ${mscpdir}			\
-        && rm -rf build			\
-        && cmake -B build		\
-        && cd ${mscpdir}/build          \
-	&& make				\
-	&& cpack -G RPM CPackConfig.cmake \
-	&& rpm -iv *.rpm
-
-# install mscp python module
-RUN cd ${mscpdir}	\
-	&& python3 setup.py install --user
-

docker/ubuntu-20.04.Dockerfile

@@ -1,39 +0,0 @@
-FROM ubuntu:20.04
-
-ARG DEBIAN_FRONTEND=noninteractive
-RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
-	ca-certificates
-
-# install pytest, and sshd for test
-RUN apt-get install -y --no-install-recommends  \
-        python3 python3-pip python3-dev openssh-server
-
-RUN python3 -m pip install pytest
-
-
-# preparation for sshd
-RUN  mkdir /var/run/sshd        \
-        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
-        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-
-
-ARG mscpdir="/mscp"
-
-COPY . ${mscpdir}
-
-# install build dependency
-RUN ${mscpdir}/scripts/install-build-deps.sh
-
-
-# build
-RUN cd ${mscpdir}			\
-	&& rm -rf build			\
-	&& cmake -B build		\
-	&& cd ${mscpdir}/build		\
-	&& make				\
-	&& cpack -G DEB CPackConfig.cmake \
-	&& dpkg -i *.deb
-
-# install mscp python module
-RUN cd ${mscpdir}       \
-        && python3 setup.py install --user

docker/ubuntu-22.04.Dockerfile

@@ -1,39 +0,0 @@
-FROM ubuntu:22.04
-
-ARG DEBIAN_FRONTEND=noninteractive
-RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
-	ca-certificates
-
-# install pytest, and sshd for test
-RUN apt-get install -y --no-install-recommends  \
-        python3 python3-pip python3-dev openssh-server
-
-RUN python3 -m pip install pytest
-
-
-# preparation for sshd
-RUN  mkdir /var/run/sshd        \
-        && ssh-keygen -f /root/.ssh/id_rsa -N ""                \
-        && mv /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-
-ARG mscpdir="/mscp"
-
-COPY . ${mscpdir}
-
-# install build dependency
-RUN ${mscpdir}/scripts/install-build-deps.sh
-
-
-# build
-RUN cd ${mscpdir}			\
-	&& rm -rf build			\
-	&& cmake -B build		\
-	&& cd ${mscpdir}/build		\
-	&& make				\
-	&& cpack -G DEB CPackConfig.cmake \
-	&& dpkg -i *.deb
-
-# install mscp python module
-RUN cd ${mscpdir}	\
-	&& python3 setup.py install --user
-

include/config.h.in

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+#define MSCP_VERSION		"@MSCP_VERSION@"
+#define MSCP_BUILD_VERSION	"@MSCP_BUILD_VERSION@"
+
+
+/* Define to 1 if you have the strlcat function. */
+#cmakedefine HAVE_STRLCAT 1
+
+/* Define to 1 if you have the htonll function. */
+#cmakedefine HAVE_HTONLL 1
+
+/* Define to 1 if you have the ntohll function. */
+#cmakedefine HAVE_NTOHLL 1
+
+#endif /* _CONFIG_H_ */

include/mscp.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifndef _MSCP_H_
 #define _MSCP_H_
 
@@ -15,13 +16,14 @@
  * libmscp is follows:
  *
  * 1. create mscp instance with mscp_init()
- * 2. connect to remote host with mscp_connect()
- * 3. add path to source files with mscp_add_src_path()
- * 4. set path to destination with mscp_set_dst_path()
- * 5. start to scan source files with mscp_scan()
- * 6. start copy with mscp_start()
- * 7. wait for copy finished with mscp_join()
- * 8. cleanup mscp instance with mscp_cleanup() and mscp_free()
+ * 2. set remote host and copy direction with mscp_set_remote()
+ * 3. connect to remote host with mscp_connect()
+ * 4. add path to source files with mscp_add_src_path()
+ * 5. set path to destination with mscp_set_dst_path()
+ * 6. start to scan source files with mscp_scan()
+ * 7. start copy with mscp_start()
+ * 8. wait for copy finished with mscp_join()
+ * 9. cleanup mscp instance with mscp_cleanup() and mscp_free()
  */
 
 #include <stdbool.h>
@@ -30,8 +32,6 @@
 #define MSCP_DIRECTION_L2R	1	/** Indicates local to remote copy */
 #define MSCP_DIRECTION_R2L	2	/** Indicates remote to local copy */
 
-#define MSCP_MAX_COREMASK_STR	64
-
 /**
  * @struct	mscp_opts
  * @brief	Structure configuring mscp.
@@ -42,22 +42,13 @@ struct mscp_opts {
 	size_t	min_chunk_sz;	/** minimum chunk size (default 64MB) */
 	size_t	max_chunk_sz;	/** maximum chunk size (default file size/nr_threads) */
 	size_t	buf_sz;		/** buffer size, default 16k. */
-	char	coremask[MSCP_MAX_COREMASK_STR]; /** hex to specifiy usable cpu cores */
-	int	max_startups;	/* sshd MaxStartups concurrent connections */
-
+	char	*coremask; /** hex to specifiy usable cpu cores */
+	int	max_startups;	/** sshd MaxStartups concurrent connections */
+	int     interval;	/** interval between SSH connection attempts */
+	bool	preserve_ts;	/** preserve file timestamps */
 	int	severity; 	/** messaging severity. set MSCP_SERVERITY_* */
-	int	msg_fd;		/** fd to output message. default STDOUT (0),
-				 * and -1 disables output */
 };
 
-#define MSCP_SSH_MAX_LOGIN_NAME		64
-#define MSCP_SSH_MAX_PORT_STR		32
-#define MSCP_SSH_MAX_IDENTITY_PATH	PATH_MAX
-#define MSCP_SSH_MAX_CIPHER_STR		32
-#define MSCP_SSH_MAX_HMAC_STR		32
-#define MSCP_SSH_MAX_COMP_STR		32 /* yes, no, zlib, zlib@openssh.com, none */
-#define MSCP_SSH_MAX_PASSWORD		128
-#define MSCP_SSH_MAX_PASSPHRASE		128
 
 /**
  * @struct	mscp_ssh_opts
@@ -65,21 +56,35 @@ struct mscp_opts {
  */
 struct mscp_ssh_opts {
 	/* ssh options */
-	char	login_name[MSCP_SSH_MAX_LOGIN_NAME];	/** ssh username */
-	char	port[MSCP_SSH_MAX_PORT_STR];		/** ssh port */
-	char	identity[MSCP_SSH_MAX_IDENTITY_PATH];	/** path to private key */
-	char	cipher[MSCP_SSH_MAX_CIPHER_STR];	/** cipher spec */
-	char	hmac[MSCP_SSH_MAX_HMAC_STR];		/** hmacp spec */
-	char	compress[MSCP_SSH_MAX_COMP_STR];	/** yes, no, zlib@openssh.com */
+	char	*login_name;	/** ssh username */
+	char	*port;		/** ssh port */
+	int	ai_family;	/** address family */
+	char	*config;	/** path to ssh_config, default ~/.ssh/config*/
+	char	*identity;	/** path to private key */
+	char	*cipher;	/** cipher spec */
+	char	*hmac;		/** hmacp spec */
+	char	*compress;	/** yes, no, zlib@openssh.com */
+	char	*ccalgo;	/** TCP cc algorithm */
 
-	char	password[MSCP_SSH_MAX_PASSWORD];	/** password auth passowrd */
-	char	passphrase[MSCP_SSH_MAX_PASSPHRASE];	/** passphrase for private key */
+	char	*password;	/** password auth passowrd */
+	char	*passphrase;	/** passphrase for private key */
 
 	int	debug_level;		/** inclirement libssh debug output level */
 	bool	no_hostkey_check;	/** do not check host keys */
 	bool	enable_nagle;		/** enable Nagle's algorithm if true */
 };
 
+/** @def
+ * Environment variable that passes password for ssh password auth
+ */
+#define ENV_SSH_AUTH_PASSWORD	"MSCP_SSH_AUTH_PASSWORD"
+
+/** @def
+ * Environment vraible that passes passphrase for private key
+ */
+#define ENV_SSH_AUTH_PASSPHRASE	"MSCP_SSH_AUTH_PASSPHRASE"
+
+
 /**
  * @struct	mscp_stats
  * @brief	Structure to get mscp statistics
@@ -87,7 +92,6 @@ struct mscp_ssh_opts {
 struct mscp_stats {
 	size_t total;	/** total bytes to be transferred */
 	size_t done;	/** total bytes transferred */
-	bool finished;	/** true when all copy threads finished */
 };
 
 
@@ -97,15 +101,22 @@ struct mscp;
 /**
  * @brief Creates a new mscp instance.
  *
- * @param remote_host	remote host for file transer.
- * @param direction	copy direction, `MSCP_DIRECTION_L2R` or `MSCP_DIRECTION_R2L`
  * @param o		options for configuring mscp.
  * @param s		options for configuring ssh connections.
  *
  * @retrun 		A new mscp instance or NULL on error.
  */
-struct mscp *mscp_init(const char *remote_host, int direction,
-		       struct mscp_opts *o, struct mscp_ssh_opts *s);
+struct mscp *mscp_init(struct mscp_opts *o, struct mscp_ssh_opts *s);
+
+/**
+ * @brief Set remote host and copy direction.
+ *
+ * @param remote_host	remote host for file transer.
+ * @param direction	copy direction, `MSCP_DIRECTION_L2R` or `MSCP_DIRECTION_R2L`
+ *
+ * @return              0 on success, < 0 if an error occured.
+ */
+int mscp_set_remote(struct mscp *m, const char *remote_host, int direction);
 
 /**
  * @brief Connect the first SSH connection. mscp_connect connects to
@@ -116,7 +127,6 @@ struct mscp *mscp_init(const char *remote_host, int direction,
  * @param m	mscp instance.
  *
  * @return 	0 on success, < 0 if an error occured.
- *              mscp_get_error() can be used to retrieve error message.
  */
 int mscp_connect(struct mscp *m);
 
@@ -124,29 +134,23 @@ int mscp_connect(struct mscp *m);
 
 /**
  * @brief Add a source file path to be copied. The path indicates
- * either a file or directory. The path can be `user@host:path`
- * notation.  In this case, `dst_path` for mscp_set_dst_path() must
- * not contain remote host notation.
+ * either a file or directory.
  *
  * @param m		mscp instance.
  * @param src_path	source file path to be copied.
  *
  * @return 		0 on success, < 0 if an error occured.
- *              	mscp_get_error() can be used to retrieve error message.
  */
 int mscp_add_src_path(struct mscp *m, const char *src_path);
 
 /**
  * @brief Set the destination file path. The path indicates either a
- * file, directory, or nonexistent path. The path can be
- * `user@host:path` notation.  In this case, all source paths appended
- * by mscp_set_src_path() must not contain remote host notation.
+ * file, directory, or nonexistent path.
  *
  * @param m		mscp instance.
  * @param dst_path	destination path to which source files copied.
  *
  * @return 		0 on success, < 0 if an error occured.
- *              	mscp_get_error() can be used to retrieve error message.
  */
 int mscp_set_dst_path(struct mscp *m, const char *dst_path);
 
@@ -161,21 +165,54 @@ int mscp_set_dst_path(struct mscp *m, const char *dst_path);
  * @param m	mscp instance.
  *
  * @return 	0 on success, < 0 if an error occured.
- *              mscp_get_error() can be used to retrieve error message.
  */
 int mscp_scan(struct mscp *m);
 
 /**
- * @brief Join scna thread invoked by mscp_scan(). mscp_join()
- * involves this, so that mscp_scan_join() should be called when
- * mscp_scan() is called by mscp_start() is not.
+ * @brief Join scan thread invoked by mscp_scan() if it
+ * runs. mscp_join() involves mscp_can_join(). Thus, there is no need
+ * to call this function alone.
  *
  * @param m	mscp instance.
  * @return	0 on success, < 0 if an error occured.
- *		mscp_get_error() can be used to retrieve error message.
  */
 int mscp_scan_join(struct mscp *m);
 
+/**
+ * @brief get information about remote host and copy direction from a
+ * checkpoint file specified by *pathname. This functions returns
+ * remote host name to *renote, and the copy direction into *dir.
+ * Thus, you can call mscp_init with those values.
+ *
+ * @param pathname	path to a checkpoint file.
+ * @param remote	char buffer to which remote hostname is stored.
+ * @param len		length of *remote.
+ * @param dir		int to which the copy direction is stored.
+ */
+int mscp_checkpoint_get_remote(const char *pathname, char *remote, size_t len, int *dir);
+
+/**
+ * @brief load information about untransferred files and chunks at the
+ * last transfer . mscp_checkpoint_load() loads files and associated
+ * chunks from the checkpoint file pointed by pathname. If you call
+ * mscp_checkpoint_load(), do not call mscp_scan().
+ *
+ * @param m		mscp instance.
+ * @param pathname	path to a checkpoint file.
+ * @return		0 on success, < 0 if an error occured.
+ */
+int mscp_checkpoint_load(struct mscp *m, const char *pathname);
+
+/**
+ * @brief save information about untransferred files and chunks to a
+ * checkpoint file.
+ *
+ * @param m		mscp instance.
+ * @param pathname	path to a checkpoint file.
+ * @return		0 on success, < 0 if an error occured.
+ */
+int mscp_checkpoint_save(struct mscp *m, const char *pathname);
+
 /**
  * @brief Start to copy files. mscp_start() returns immediately. You
  * can get statistics via mscp_get_stats() or messages via pipe set by
@@ -185,7 +222,6 @@ int mscp_scan_join(struct mscp *m);
  * @param m	mscp instance.
  *
  * @return 	number of threads on success, < 0 if an error occured.
- *              mscp_get_error() can be used to retrieve error message.
  *
  * @see		mscp_join()
  */
@@ -207,7 +243,6 @@ void mscp_stop(struct mscp *m);
  * @param m	mscp instance.
  *
  * @return 	0 on success, < 0 if an error occured.
- *              mscp_get_error() can be used to retrieve error message.
  */
 int mscp_join(struct mscp *m);
 
@@ -257,15 +292,4 @@ enum {
 };
 
 
-
-/**
- * @brief Get the recent error message from libmscp. Note that this
- * function is not thread-safe.
- *
- * @return 	pointer to the message.
- */
-const char *mscp_get_error(void);
-
-
-
 #endif /* _MSCP_H_ */

mscp/__init__.py

@@ -1 +0,0 @@
-from mscp.mscp import *

mscp/mscp.py

@@ -1,183 +0,0 @@
-
-_retry_import_pymscp = False
-
-try:
-    import pymscp
-except ImportError:
-    _retry_import_pymscp = True
-
-if _retry_import_pymscp:
-    """ libmscp.so is not installed on system library paths. So retry
-    to import libmscp.so installed on the mscp python module
-    directory.
-    """
-    import os
-    import sys
-    import ctypes
-
-    if sys.platform == "linux":
-        libmscp = "libmscp.so"
-    elif sys.platform == "darwin":
-        libmscp = "libmscp.dylib"
-
-    mscp_dir = os.path.dirname(__file__)
-    ctypes.cdll.LoadLibrary("{}/{}".format(mscp_dir, libmscp))
-    import pymscp
-
-
-# inherit static values from pymscp
-LOCAL2REMOTE    = pymscp.LOCAL2REMOTE
-REMOTE2LOCAL    = pymscp.REMOTE2LOCAL
-SEVERITY_NONE   = pymscp.SEVERITY_NONE
-SEVERITY_ERR    = pymscp.SEVERITY_ERR
-SEVERITY_WARN   = pymscp.SEVERITY_WARN
-SEVERITY_NOTICE = pymscp.SEVERITY_NOTICE
-SEVERITY_INFO   = pymscp.SEVERITY_INFO
-SEVERITY_DEBUG  = pymscp.SEVERITY_DEBUG
-
-STATE_INIT      = 0
-STATE_CONNECTED = 1
-STATE_SCANNED  = 2
-STATE_RUNNING   = 3
-STATE_STOPPED   = 4
-STATE_JOINED    = 5
-STATE_CLEANED   = 6
-STATE_RELEASED  = 7
-
-_state_str = {
-    STATE_INIT:      "init",
-    STATE_CONNECTED: "connected",
-    STATE_SCANNED:  "scanned",
-    STATE_RUNNING:   "running",
-    STATE_STOPPED:   "stopped",
-    STATE_JOINED:    "joined",
-    STATE_CLEANED:   "cleaned",
-    STATE_RELEASED:  "released",
-}
-
-
-class mscp:
-
-
-    def __init__(self, remote: str, direction: int, **kwargs):
-        self.remote = remote
-        self.direction = direction
-        kwargs["remote"] = remote
-        kwargs["direction"] = direction
-        self.m = pymscp.mscp_init(**kwargs)
-
-        self.src_paths = []
-        self.dst_path = None
-        self.state = STATE_INIT
-
-    def __str__(self):
-        if not hasattr(self, "state"):
-            # this instance failed on mscp_init
-            return "mscp:{}:init-failed"
-        return "mscp:{}:{}".format(self.remote, self.__state2str())
-
-    def __repr__(self):
-        return "<{}>".format(str(self))
-
-    def __del__(self):
-
-        if not hasattr(self, "state"):
-            return # this instance failed on mscp_init
-
-        if self.state == STATE_RUNNING:
-            self.stop()
-        if self.state == STATE_STOPPED:
-            self.join()
-
-        self.cleanup()
-        self.release()
-
-    def __state2str(self):
-        return _state_str[self.state]
-
-
-    def connect(self):
-        if not (self.state == STATE_INIT or state.state == STATE_CLEANED):
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        pymscp.mscp_connect(m = self.m)
-        self.state = STATE_CONNECTED
-
-    def add_src_path(self, src_path: str):
-        if type(src_path) != str:
-            raise ValueError("src_path must be str: {}".format(src_path))
-        self.src_paths.append(src_path)
-        pymscp.mscp_add_src_path(m = self.m, src_path = src_path)
-
-    def set_dst_path(self, dst_path: str):
-        if type(dst_path) != str:
-            raise ValueError("dst_path must be str: {}".format(dst_path))
-        self.dst_path = dst_path
-        pymscp.mscp_set_dst_path(m = self.m, dst_path = dst_path);
-
-    def scan(self):
-        if self.state != STATE_CONNECTED:
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        if not self.src_paths:
-            raise RuntimeError("src path list is empty")
-        if self.dst_path == None:
-            raise RuntimeError("dst path is not set")
-
-        pymscp.mscp_scan(m = self.m)
-        self.state = STATE_SCANNED
-
-    def start(self):
-        if self.state != STATE_SCANNED:
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-
-        pymscp.mscp_start(m = self.m)
-        self.state = STATE_RUNNING
-
-    def stop(self):
-        if self.state != STATE_RUNNING:
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        pymscp.mscp_stop(m = self.m)
-        self.state = STATE_STOPPED
-
-    def join(self):
-        if not (self.state == STATE_RUNNING or self.state == STATE_STOPPED):
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        pymscp.mscp_join(m = self.m)
-        self.state = STATE_JOINED
-
-    def stats(self):
-        return pymscp.mscp_get_stats(m = self.m)
-
-    def cleanup(self):
-        if self.state == STATE_RUNNING:
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        pymscp.mscp_cleanup(m = self.m)
-        self.state = STATE_CLEANED
-
-    def release(self):
-        if self.state != STATE_CLEANED:
-            raise RuntimeError("invalid mscp state: {}".format(self.__state2str()))
-        pymscp.mscp_free(m = self.m)
-        self.state = STATE_RELEASED
-
-    # Simple interface: mscp.copy(src, dst)
-    def copy(self, src, dst, nonblock = False):
-        if self.state < STATE_CONNECTED:
-            self.connect()
-
-        if type(src) == list:
-            for path in src:
-                self.add_src_path(path)
-        elif type(src) == str:
-            self.add_src_path(src)
-        else:
-            raise ValueError("src must be str of list: '{}'".format(src))
-
-        self.set_dst_path(dst)
-        
-        self.scan()
-        self.start()
-        if nonblock:
-            return
-
-        self.join()
-        self.cleanup()

patch/README.md

@@ -1,13 +1,5 @@
 
-Patch(es) in this directory introduces `sftp_async_write()` and
+Patches in this directory introduces `sftp_async_write()` and
 `sftp_async_write_end()` to libssh. Those implementations are derived
 from https://github.com/limes-datentechnik-gmbh/libssh. See [Re: SFTP
 Write async](https://archive.libssh.org/libssh/2020-06/0000004.html).
-
-```console
-git clone https://git.libssh.org/projects/libssh.git/ --depth=1 -b libssh-0.10.4
-cd libssh
-git apply ../pathc/libssh-0.10.4.patch
-
-# then build libssh
-```

patch/libssh-0.10.4.patch

@@ -1,3 +1,28 @@
+diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
+index 7103f303..c64eb39d 100644
+--- a/ConfigureChecks.cmake
++++ b/ConfigureChecks.cmake
+@@ -258,6 +258,7 @@ if (UNIX)
+     check_library_exists(util forkpty "" HAVE_LIBUTIL)
+     check_function_exists(cfmakeraw HAVE_CFMAKERAW)
+     check_function_exists(__strtoull HAVE___STRTOULL)
++    check_symbol_exists(TCP_CONGESTION "netinet/tcp.h" HAVE_TCP_CONGESTION)
+ endif (UNIX)
+ 
+ set(LIBSSH_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "libssh required system libraries")
+diff --git a/config.h.cmake b/config.h.cmake
+index 1357615b..1e915ead 100644
+--- a/config.h.cmake
++++ b/config.h.cmake
+@@ -237,6 +237,8 @@
+ 
+ #cmakedefine HAVE_GCC_BOUNDED_ATTRIBUTE 1
+ 
++#cmakedefine HAVE_TCP_CONGESTION 1
++
+ /* Define to 1 if you want to enable GSSAPI */
+ #cmakedefine WITH_GSSAPI 1
+ 
 diff --git a/include/libssh/buffer.h b/include/libssh/buffer.h
 index a55a1b40..e34e075c 100644
 --- a/include/libssh/buffer.h
@@ -12,10 +37,18 @@ index a55a1b40..e34e075c 100644
  int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
  
 diff --git a/include/libssh/libssh.h b/include/libssh/libssh.h
-index 7857a77b..3eef7a16 100644
+index 7857a77b..6b4d481c 100644
 --- a/include/libssh/libssh.h
 +++ b/include/libssh/libssh.h
-@@ -833,6 +833,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
+@@ -402,6 +402,7 @@ enum ssh_options_e {
+   SSH_OPTIONS_GSSAPI_AUTH,
+   SSH_OPTIONS_GLOBAL_KNOWNHOSTS,
+   SSH_OPTIONS_NODELAY,
++  SSH_OPTIONS_CCALGO,
+   SSH_OPTIONS_PUBLICKEY_ACCEPTED_TYPES,
+   SSH_OPTIONS_PROCESS_CONFIG,
+   SSH_OPTIONS_REKEY_DATA,
+@@ -833,6 +834,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
  LIBSSH_API const char* ssh_get_hmac_out(ssh_session session);
  
  LIBSSH_API ssh_buffer ssh_buffer_new(void);
@@ -23,7 +56,7 @@ index 7857a77b..3eef7a16 100644
  LIBSSH_API void ssh_buffer_free(ssh_buffer buffer);
  #define SSH_BUFFER_FREE(x) \
      do { if ((x) != NULL) { ssh_buffer_free(x); x = NULL; } } while(0)
-@@ -843,6 +844,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
+@@ -843,6 +845,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
  LIBSSH_API uint32_t ssh_buffer_get_len(ssh_buffer buffer);
  LIBSSH_API int ssh_session_set_disconnect_message(ssh_session session, const char *message);
  
@@ -32,6 +65,18 @@ index 7857a77b..3eef7a16 100644
  #ifndef LIBSSH_LEGACY_0_4
  #include "libssh/legacy.h"
  #endif
+diff --git a/include/libssh/session.h b/include/libssh/session.h
+index d3e5787c..15183d1b 100644
+--- a/include/libssh/session.h
++++ b/include/libssh/session.h
+@@ -232,6 +232,7 @@ struct ssh_session_struct {
+         int gss_delegate_creds;
+         int flags;
+         int nodelay;
++        char *ccalgo;
+         bool config_processed;
+         uint8_t options_seen[SOC_MAX];
+         uint64_t rekey_data;
 diff --git a/include/libssh/sftp.h b/include/libssh/sftp.h
 index c855df8a..0fcdb9b8 100644
 --- a/include/libssh/sftp.h
@@ -158,6 +203,106 @@ index e0068015..cc0caf35 100644
  /**
   * @brief Ensure the buffer has at least a certain preallocated size.
   *
+diff --git a/src/connect.c b/src/connect.c
+index 57e37e63..c02397d5 100644
+--- a/src/connect.c
++++ b/src/connect.c
+@@ -156,6 +156,20 @@ static int set_tcp_nodelay(socket_t socket)
+                       sizeof(opt));
+ }
+ 
++static int set_tcp_ccalgo(socket_t socket, const char *ccalgo)
++{
++#ifdef HAVE_TCP_CONGESTION
++	return setsockopt(socket,
++			  IPPROTO_TCP,
++			  TCP_CONGESTION,
++			  (void *)ccalgo,
++			  strlen(ccalgo));
++#else
++	errno = ENOTSUP;
++	return -1;
++#endif
++}
++
+ /**
+  * @internal
+  *
+@@ -256,6 +270,18 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
+             }
+         }
+ 
++        if (session->opts.ccalgo) {
++	     rc = set_tcp_ccalgo(s, session->opts.ccalgo);
++	     if (rc < 0) {
++		 ssh_set_error(session, SSH_FATAL,
++			       "Failed to set TCP_CONGESTION on socket: %s",
++			       ssh_strerror(errno, err_msg, SSH_ERRNO_MSG_MAX));
++		 ssh_connect_socket_close(s);
++		 s = -1;
++		 continue;
++	     }
++	}
++
+         errno = 0;
+         rc = connect(s, itr->ai_addr, itr->ai_addrlen);
+         if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
+diff --git a/src/options.c b/src/options.c
+index 49aaefa2..9f7360c3 100644
+--- a/src/options.c
++++ b/src/options.c
+@@ -210,6 +210,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest)
+     new->opts.gss_delegate_creds    = src->opts.gss_delegate_creds;
+     new->opts.flags                 = src->opts.flags;
+     new->opts.nodelay               = src->opts.nodelay;
++    new->opts.ccalgo                = src->opts.ccalgo;
+     new->opts.config_processed      = src->opts.config_processed;
+     new->common.log_verbosity       = src->common.log_verbosity;
+     new->common.callbacks           = src->common.callbacks;
+@@ -450,6 +451,10 @@ int ssh_options_set_algo(ssh_session session,
+  *                Set it to disable Nagle's Algorithm (TCP_NODELAY) on the
+  *                session socket. (int, 0=false)
+  *
++ *              - SSH_OPTIONS_CCALGO
++ *                Set it to specify TCP congestion control algorithm on the
++ *                session socket (Linux only). (int, 0=false)
++ *
+  *              - SSH_OPTIONS_PROCESS_CONFIG
+  *                Set it to false to disable automatic processing of per-user
+  *                and system-wide OpenSSH configuration files. LibSSH
+@@ -1013,6 +1018,20 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
+                 session->opts.nodelay = (*x & 0xff) > 0 ? 1 : 0;
+             }
+             break;
++	case SSH_OPTIONS_CCALGO:
++            v = value;
++            if (v == NULL || v[0] == '\0') {
++                ssh_set_error_invalid(session);
++                return -1;
++            } else {
++                SAFE_FREE(session->opts.ccalgo);
++                session->opts.ccalgo = strdup(v);
++                if (session->opts.ccalgo == NULL) {
++                    ssh_set_error_oom(session);
++                    return -1;
++                }
++            }
++            break;
+         case SSH_OPTIONS_PROCESS_CONFIG:
+             if (value == NULL) {
+                 ssh_set_error_invalid(session);
+diff --git a/src/session.c b/src/session.c
+index 6025c133..6b197526 100644
+--- a/src/session.c
++++ b/src/session.c
+@@ -108,6 +108,7 @@ ssh_session ssh_new(void)
+     session->opts.fd = -1;
+     session->opts.compressionlevel = 7;
+     session->opts.nodelay = 0;
++    session->opts.ccalgo = NULL;
+ 
+     session->opts.flags = SSH_OPT_FLAG_PASSWORD_AUTH |
+                           SSH_OPT_FLAG_PUBKEY_AUTH |
 diff --git a/src/sftp.c b/src/sftp.c
 index e01012a8..702623a0 100644
 --- a/src/sftp.c

patch/libssh-0.10.6-2-g6f1b1e76.patch

@@ -0,0 +1,533 @@
+diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
+index 9de10225..0f3d20ed 100644
+--- a/ConfigureChecks.cmake
++++ b/ConfigureChecks.cmake
+@@ -258,6 +258,7 @@ if (UNIX)
+     check_library_exists(util forkpty "" HAVE_LIBUTIL)
+     check_function_exists(cfmakeraw HAVE_CFMAKERAW)
+     check_function_exists(__strtoull HAVE___STRTOULL)
++    check_symbol_exists(TCP_CONGESTION "netinet/tcp.h" HAVE_TCP_CONGESTION)
+ endif (UNIX)
+ 
+ set(LIBSSH_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "libssh required system libraries")
+diff --git a/config.h.cmake b/config.h.cmake
+index cc83734d..f74cd03b 100644
+--- a/config.h.cmake
++++ b/config.h.cmake
+@@ -237,6 +237,8 @@
+ 
+ #cmakedefine HAVE_GCC_BOUNDED_ATTRIBUTE 1
+ 
++#cmakedefine HAVE_TCP_CONGESTION 1
++
+ /* Define to 1 if you want to enable GSSAPI */
+ #cmakedefine WITH_GSSAPI 1
+ 
+diff --git a/include/libssh/buffer.h b/include/libssh/buffer.h
+index 1fce7b76..b64d1455 100644
+--- a/include/libssh/buffer.h
++++ b/include/libssh/buffer.h
+@@ -37,6 +37,8 @@ int ssh_buffer_add_u8(ssh_buffer buffer, uint8_t data);
+ int ssh_buffer_add_u16(ssh_buffer buffer, uint16_t data);
+ int ssh_buffer_add_u32(ssh_buffer buffer, uint32_t data);
+ int ssh_buffer_add_u64(ssh_buffer buffer, uint64_t data);
++ssize_t ssh_buffer_add_func(ssh_buffer buffer, ssh_add_func f, size_t max_bytes,
++			    void *userdata);
+ 
+ int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
+ 
+diff --git a/include/libssh/libssh.h b/include/libssh/libssh.h
+index 669a0a96..da5b4099 100644
+--- a/include/libssh/libssh.h
++++ b/include/libssh/libssh.h
+@@ -368,6 +368,7 @@ enum ssh_options_e {
+   SSH_OPTIONS_HOST,
+   SSH_OPTIONS_PORT,
+   SSH_OPTIONS_PORT_STR,
++  SSH_OPTIONS_AI_FAMILY,
+   SSH_OPTIONS_FD,
+   SSH_OPTIONS_USER,
+   SSH_OPTIONS_SSH_DIR,
+@@ -402,6 +403,7 @@ enum ssh_options_e {
+   SSH_OPTIONS_GSSAPI_AUTH,
+   SSH_OPTIONS_GLOBAL_KNOWNHOSTS,
+   SSH_OPTIONS_NODELAY,
++  SSH_OPTIONS_CCALGO,
+   SSH_OPTIONS_PUBLICKEY_ACCEPTED_TYPES,
+   SSH_OPTIONS_PROCESS_CONFIG,
+   SSH_OPTIONS_REKEY_DATA,
+@@ -833,6 +835,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
+ LIBSSH_API const char* ssh_get_hmac_out(ssh_session session);
+ 
+ LIBSSH_API ssh_buffer ssh_buffer_new(void);
++LIBSSH_API ssh_buffer ssh_buffer_new_size(uint32_t size, uint32_t headroom);
+ LIBSSH_API void ssh_buffer_free(ssh_buffer buffer);
+ #define SSH_BUFFER_FREE(x) \
+     do { if ((x) != NULL) { ssh_buffer_free(x); x = NULL; } } while(0)
+@@ -843,6 +846,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
+ LIBSSH_API uint32_t ssh_buffer_get_len(ssh_buffer buffer);
+ LIBSSH_API int ssh_session_set_disconnect_message(ssh_session session, const char *message);
+ 
++typedef ssize_t (*ssh_add_func) (void *ptr, size_t max_bytes, void *userdata);
++
+ #ifndef LIBSSH_LEGACY_0_4
+ #include "libssh/legacy.h"
+ #endif
+diff --git a/include/libssh/session.h b/include/libssh/session.h
+index 97936195..e4fc4fce 100644
+--- a/include/libssh/session.h
++++ b/include/libssh/session.h
+@@ -249,6 +249,7 @@ struct ssh_session_struct {
+         unsigned long timeout; /* seconds */
+         unsigned long timeout_usec;
+         uint16_t port;
++        int  ai_family;
+         socket_t fd;
+         int StrictHostKeyChecking;
+         char compressionlevel;
+@@ -258,6 +259,7 @@ struct ssh_session_struct {
+         int flags;
+         int exp_flags;
+         int nodelay;
++        char *ccalgo;
+         bool config_processed;
+         uint8_t options_seen[SOC_MAX];
+         uint64_t rekey_data;
+diff --git a/include/libssh/sftp.h b/include/libssh/sftp.h
+index c713466e..e27fe326 100644
+--- a/include/libssh/sftp.h
++++ b/include/libssh/sftp.h
+@@ -565,6 +565,10 @@ LIBSSH_API int sftp_async_read(sftp_file file, void *data, uint32_t len, uint32_
+  */
+ LIBSSH_API ssize_t sftp_write(sftp_file file, const void *buf, size_t count);
+ 
++LIBSSH_API ssize_t sftp_async_write(sftp_file file, ssh_add_func f, size_t count,
++				    void *userdata, uint32_t* id);
++LIBSSH_API int sftp_async_write_end(sftp_file file, uint32_t id, int blocking);
++
+ /**
+  * @brief Seek to a specific location in a file.
+  *
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 807313b5..86487087 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -448,6 +448,11 @@ if (BUILD_STATIC_LIB)
+   if (WIN32)
+     target_compile_definitions(ssh-static PUBLIC "LIBSSH_STATIC")
+   endif (WIN32)
++
++  install(TARGETS ssh-static
++	  EXPORT libssh-config
++	  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
++	  COMPONENT libraries)
+ endif (BUILD_STATIC_LIB)
+ 
+ message(STATUS "Threads_FOUND=${Threads_FOUND}")
+diff --git a/src/buffer.c b/src/buffer.c
+index 8991e006..e0414801 100644
+--- a/src/buffer.c
++++ b/src/buffer.c
+@@ -142,6 +142,40 @@ struct ssh_buffer_struct *ssh_buffer_new(void)
+     return buf;
+ }
+ 
++/**
++ * @brief Create a new SSH buffer with a specified size and headroom.
++ *
++ * @param[in] len       length for newly initialized SSH buffer.
++ * @param[in] headroom  length for headroom
++ * @return A newly initialized SSH buffer, NULL on error.
++ */
++struct ssh_buffer_struct *ssh_buffer_new_size(uint32_t len, uint32_t headroom)
++{
++    struct ssh_buffer_struct *buf = NULL;
++    int rc;
++
++    if (len < headroom)
++	    return NULL;
++
++    buf = calloc(1, sizeof(struct ssh_buffer_struct));
++    if (buf == NULL) {
++        return NULL;
++    }
++
++    rc = ssh_buffer_allocate_size(buf, len);
++    if (rc != 0) {
++        SAFE_FREE(buf);
++        return NULL;
++    }
++
++    buf->pos += headroom;
++    buf->used += headroom;
++
++    buffer_verify(buf);
++
++    return buf;
++}
++
+ /**
+  * @brief Deallocate a SSH buffer.
+  *
+@@ -329,6 +363,49 @@ int ssh_buffer_add_data(struct ssh_buffer_struct *buffer, const void *data, uint
+     return 0;
+ }
+ 
++/**
++ * @brief Add data at the tail of a buffer by an external function
++ *
++ * @param[in]  buffer    The buffer to add data.
++ *
++ * @param[in]  f         function that adds data to the buffer.
++ *
++ * @param[in]  max_bytes The maximum length of the data to add.
++ *
++ * @return               actual bytes added on success, < 0 on error.
++ */
++ssize_t ssh_buffer_add_func(struct ssh_buffer_struct *buffer, ssh_add_func f,
++			    size_t max_bytes, void *userdata)
++{
++    ssize_t actual;
++
++    if (buffer == NULL) {
++        return -1;
++    }
++
++    buffer_verify(buffer);
++
++    if (buffer->used + max_bytes < max_bytes) {
++        return -1;
++    }
++
++    if (buffer->allocated < (buffer->used + max_bytes)) {
++        if (buffer->pos > 0) {
++            buffer_shift(buffer);
++        }
++        if (realloc_buffer(buffer, buffer->used + max_bytes) < 0) {
++            return -1;
++        }
++    }
++
++    if ((actual = f(buffer->data + buffer->used, max_bytes, userdata)) < 0)
++      return -1;
++
++    buffer->used += actual;
++    buffer_verify(buffer);
++    return actual;
++}
++
+ /**
+  * @brief Ensure the buffer has at least a certain preallocated size.
+  *
+diff --git a/src/connect.c b/src/connect.c
+index 15cae644..02ef43b4 100644
+--- a/src/connect.c
++++ b/src/connect.c
+@@ -114,7 +114,7 @@ static int ssh_connect_socket_close(socket_t s)
+ #endif
+ }
+ 
+-static int getai(const char *host, int port, struct addrinfo **ai)
++static int getai(const char *host, int port, int ai_family, struct addrinfo **ai)
+ {
+     const char *service = NULL;
+     struct addrinfo hints;
+@@ -123,7 +123,7 @@ static int getai(const char *host, int port, struct addrinfo **ai)
+     ZERO_STRUCT(hints);
+ 
+     hints.ai_protocol = IPPROTO_TCP;
+-    hints.ai_family = PF_UNSPEC;
++    hints.ai_family = ai_family > 0 ? ai_family : PF_UNSPEC;
+     hints.ai_socktype = SOCK_STREAM;
+ 
+     if (port == 0) {
+@@ -156,6 +156,20 @@ static int set_tcp_nodelay(socket_t socket)
+                       sizeof(opt));
+ }
+ 
++static int set_tcp_ccalgo(socket_t socket, const char *ccalgo)
++{
++#ifdef HAVE_TCP_CONGESTION
++	return setsockopt(socket,
++			  IPPROTO_TCP,
++			  TCP_CONGESTION,
++			  (void *)ccalgo,
++			  strlen(ccalgo));
++#else
++	errno = ENOTSUP;
++	return -1;
++#endif
++}
++
+ /**
+  * @internal
+  *
+@@ -173,7 +187,7 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
+     struct addrinfo *ai = NULL;
+     struct addrinfo *itr = NULL;
+ 
+-    rc = getai(host, port, &ai);
++    rc = getai(host, port, session->opts.ai_family, &ai);
+     if (rc != 0) {
+         ssh_set_error(session, SSH_FATAL,
+                       "Failed to resolve hostname %s (%s)",
+@@ -199,7 +213,7 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
+ 
+             SSH_LOG(SSH_LOG_PACKET, "Resolving %s", bind_addr);
+ 
+-            rc = getai(bind_addr, 0, &bind_ai);
++            rc = getai(bind_addr, 0, session->opts.ai_family, &bind_ai);
+             if (rc != 0) {
+                 ssh_set_error(session, SSH_FATAL,
+                               "Failed to resolve bind address %s (%s)",
+@@ -256,6 +270,18 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
+             }
+         }
+ 
++        if (session->opts.ccalgo) {
++	     rc = set_tcp_ccalgo(s, session->opts.ccalgo);
++	     if (rc < 0) {
++		 ssh_set_error(session, SSH_FATAL,
++			       "Failed to set TCP_CONGESTION on socket: %s",
++			       ssh_strerror(errno, err_msg, SSH_ERRNO_MSG_MAX));
++		 ssh_connect_socket_close(s);
++		 s = -1;
++		 continue;
++	     }
++	}
++
+         errno = 0;
+         rc = connect(s, itr->ai_addr, itr->ai_addrlen);
+         if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
+diff --git a/src/options.c b/src/options.c
+index b3ecffe1..8de24ed6 100644
+--- a/src/options.c
++++ b/src/options.c
+@@ -217,6 +217,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest)
+     new->opts.gss_delegate_creds    = src->opts.gss_delegate_creds;
+     new->opts.flags                 = src->opts.flags;
+     new->opts.nodelay               = src->opts.nodelay;
++    new->opts.ccalgo                = src->opts.ccalgo;
+     new->opts.config_processed      = src->opts.config_processed;
+     new->common.log_verbosity       = src->common.log_verbosity;
+     new->common.callbacks           = src->common.callbacks;
+@@ -268,6 +269,9 @@ int ssh_options_set_algo(ssh_session session,
+  *              - SSH_OPTIONS_PORT_STR:
+  *                The port to connect to (const char *).
+  *
++ *              - SSH_OPTIONS_AI_FAMILY:
++ *                The address family for connecting (int *).
++ *
+  *              - SSH_OPTIONS_FD:
+  *                The file descriptor to use (socket_t).\n
+  *                \n
+@@ -458,6 +462,10 @@ int ssh_options_set_algo(ssh_session session,
+  *                Set it to disable Nagle's Algorithm (TCP_NODELAY) on the
+  *                session socket. (int, 0=false)
+  *
++ *              - SSH_OPTIONS_CCALGO
++ *                Set it to specify TCP congestion control algorithm on the
++ *                session socket (Linux only). (int, 0=false)
++ *
+  *              - SSH_OPTIONS_PROCESS_CONFIG
+  *                Set it to false to disable automatic processing of per-user
+  *                and system-wide OpenSSH configuration files. LibSSH
+@@ -571,6 +579,21 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
+                 session->opts.port = i & 0xffffU;
+             }
+             break;
++        case SSH_OPTIONS_AI_FAMILY:
++            if (value == NULL) {
++                session->opts.ai_family = 0;
++                ssh_set_error_invalid(session);
++                return -1;
++            } else {
++                int *x = (int *) value;
++                if (*x < 0) {
++		    session->opts.ai_family = 0;
++                    ssh_set_error_invalid(session);
++                    return -1;
++                }
++                session->opts.ai_family = *x;
++            }
++            break;
+         case SSH_OPTIONS_FD:
+             if (value == NULL) {
+                 session->opts.fd = SSH_INVALID_SOCKET;
+@@ -1017,6 +1040,20 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
+                 session->opts.nodelay = (*x & 0xff) > 0 ? 1 : 0;
+             }
+             break;
++	case SSH_OPTIONS_CCALGO:
++            v = value;
++            if (v == NULL || v[0] == '\0') {
++                ssh_set_error_invalid(session);
++                return -1;
++            } else {
++                SAFE_FREE(session->opts.ccalgo);
++                session->opts.ccalgo = strdup(v);
++                if (session->opts.ccalgo == NULL) {
++                    ssh_set_error_oom(session);
++                    return -1;
++                }
++            }
++            break;
+         case SSH_OPTIONS_PROCESS_CONFIG:
+             if (value == NULL) {
+                 ssh_set_error_invalid(session);
+diff --git a/src/session.c b/src/session.c
+index 8c509699..307388e5 100644
+--- a/src/session.c
++++ b/src/session.c
+@@ -105,9 +105,11 @@ ssh_session ssh_new(void)
+     /* OPTIONS */
+     session->opts.StrictHostKeyChecking = 1;
+     session->opts.port = 22;
++    session->opts.ai_family = 0;
+     session->opts.fd = -1;
+     session->opts.compressionlevel = 7;
+     session->opts.nodelay = 0;
++    session->opts.ccalgo = NULL;
+ 
+     session->opts.flags = SSH_OPT_FLAG_PASSWORD_AUTH |
+                           SSH_OPT_FLAG_PUBKEY_AUTH |
+diff --git a/src/sftp.c b/src/sftp.c
+index e01012a8..3b86c3c6 100644
+--- a/src/sftp.c
++++ b/src/sftp.c
+@@ -2228,6 +2228,135 @@ ssize_t sftp_write(sftp_file file, const void *buf, size_t count) {
+   return -1; /* not reached */
+ }
+ 
++/*
++ * sftp_async_write is based on and sftp_async_write_end is copied from
++ * https://github.com/limes-datentechnik-gmbh/libssh
++ *
++ * sftp_async_write has some optimizations:
++ * - use ssh_buffer_new_size() to reduce realoc_buffer.
++ * - use ssh_buffer_add_func() to avoid memcpy from read buffer to ssh buffer.
++ */
++ssize_t sftp_async_write(sftp_file file, ssh_add_func f, size_t count, void *userdata,
++			 uint32_t* id) {
++  sftp_session sftp = file->sftp;
++  ssh_buffer buffer;
++  uint32_t buf_sz;
++  ssize_t actual;
++  int len;
++  int packetlen;
++  int rc;
++
++#define HEADROOM 16
++  /* sftp_packet_write() prepends a 5-bytes (uint32_t length and
++   * 1-byte type) header to the head of the payload by
++   * ssh_buffer_prepend_data(). Inserting headroom by
++   * ssh_buffer_new_size() eliminates memcpy for prepending the
++   * header.
++   */
++
++  buf_sz = (HEADROOM + /* for header */
++	    sizeof(uint32_t) + /* id */
++	    ssh_string_len(file->handle) + 4 + /* file->handle */
++	    sizeof(uint64_t) + /* file->offset */
++	    sizeof(uint32_t) + /* count */
++	    count); /* datastring */
++
++  buffer = ssh_buffer_new_size(buf_sz, HEADROOM);
++  if (buffer == NULL) {
++    ssh_set_error(sftp->session, SSH_FATAL,
++		  "ssh_buffer_new_size failed: Out of Memory");
++    return -1;
++  }
++
++  *id = sftp_get_new_id(file->sftp);
++
++  rc = ssh_buffer_pack(buffer,
++                       "dSqd",
++                       *id,
++                       file->handle,
++                       file->offset,
++                       count); /* len of datastring */
++
++  if (rc != SSH_OK){
++    ssh_set_error(sftp->session, SSH_FATAL,
++		  "ssh_buffer_pack failed: Out of Memory");
++    ssh_buffer_free(buffer);
++    return SSH_ERROR;
++  }
++
++  actual = ssh_buffer_add_func(buffer, f, count, userdata);
++  if (actual < 0){
++    ssh_set_error(sftp->session, SSH_FATAL,
++		  "ssh_buffer_add_func failed: %s", strerror(errno));
++    ssh_buffer_free(buffer);
++    return SSH_ERROR;
++  }
++
++  packetlen=ssh_buffer_get_len(buffer)+5;
++  len = sftp_packet_write(file->sftp, SSH_FXP_WRITE, buffer);
++  ssh_buffer_free(buffer);
++  if (len < 0) {
++    return SSH_ERROR;
++  } else  if (len != packetlen) {
++    ssh_set_error(sftp->session, SSH_FATAL,
++      "Could only send %d of %d bytes to remote host!", len, packetlen);
++    SSH_LOG(SSH_LOG_PACKET,
++        "Could not write as much data as expected");
++    return SSH_ERROR;
++  }
++
++  file->offset += actual;
++
++  return actual;
++}
++
++int sftp_async_write_end(sftp_file file, uint32_t id, int blocking) {
++  sftp_session sftp = file->sftp;
++  sftp_message msg = NULL;
++  sftp_status_message status;
++
++  msg = sftp_dequeue(sftp, id);
++  while (msg == NULL) {
++    if (!blocking && ssh_channel_poll(sftp->channel, 0) == 0) {
++      /* we cannot block */
++      return SSH_AGAIN;
++    }
++    if (sftp_read_and_dispatch(sftp) < 0) {
++      /* something nasty has happened */
++      return SSH_ERROR;
++    }
++    msg = sftp_dequeue(sftp, id);
++  }
++
++  switch (msg->packet_type) {
++    case SSH_FXP_STATUS:
++      status = parse_status_msg(msg);
++      sftp_message_free(msg);
++      if (status == NULL) {
++        return SSH_ERROR;
++      }
++      sftp_set_error(sftp, status->status);
++      switch (status->status) {
++        case SSH_FX_OK:
++          status_msg_free(status);
++          return SSH_OK;
++        default:
++          break;
++      }
++      ssh_set_error(sftp->session, SSH_REQUEST_DENIED,
++          "SFTP server: %s", status->errormsg);
++      status_msg_free(status);
++      return SSH_ERROR;
++    default:
++      ssh_set_error(sftp->session, SSH_FATAL,
++          "Received message %d during write!", msg->packet_type);
++      sftp_message_free(msg);
++      return SSH_ERROR;
++  }
++
++  return SSH_ERROR; /* not reached */
++}
++
+ /* Seek to a specific location in a file. */
+ int sftp_seek(sftp_file file, uint32_t new_offset) {
+   if (file == NULL) {

patch/libssh-0.10.6.patch

@@ -0,0 +1,442 @@
+diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
+index 9de10225..0f3d20ed 100644
+--- a/ConfigureChecks.cmake
++++ b/ConfigureChecks.cmake
+@@ -258,6 +258,7 @@ if (UNIX)
+     check_library_exists(util forkpty "" HAVE_LIBUTIL)
+     check_function_exists(cfmakeraw HAVE_CFMAKERAW)
+     check_function_exists(__strtoull HAVE___STRTOULL)
++    check_symbol_exists(TCP_CONGESTION "netinet/tcp.h" HAVE_TCP_CONGESTION)
+ endif (UNIX)
+ 
+ set(LIBSSH_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "libssh required system libraries")
+diff --git a/config.h.cmake b/config.h.cmake
+index cc83734d..f74cd03b 100644
+--- a/config.h.cmake
++++ b/config.h.cmake
+@@ -237,6 +237,8 @@
+ 
+ #cmakedefine HAVE_GCC_BOUNDED_ATTRIBUTE 1
+ 
++#cmakedefine HAVE_TCP_CONGESTION 1
++
+ /* Define to 1 if you want to enable GSSAPI */
+ #cmakedefine WITH_GSSAPI 1
+ 
+diff --git a/include/libssh/buffer.h b/include/libssh/buffer.h
+index 1fce7b76..b64d1455 100644
+--- a/include/libssh/buffer.h
++++ b/include/libssh/buffer.h
+@@ -37,6 +37,8 @@ int ssh_buffer_add_u8(ssh_buffer buffer, uint8_t data);
+ int ssh_buffer_add_u16(ssh_buffer buffer, uint16_t data);
+ int ssh_buffer_add_u32(ssh_buffer buffer, uint32_t data);
+ int ssh_buffer_add_u64(ssh_buffer buffer, uint64_t data);
++ssize_t ssh_buffer_add_func(ssh_buffer buffer, ssh_add_func f, size_t max_bytes,
++			    void *userdata);
+ 
+ int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
+ 
+diff --git a/include/libssh/libssh.h b/include/libssh/libssh.h
+index 669a0a96..b6a93ac7 100644
+--- a/include/libssh/libssh.h
++++ b/include/libssh/libssh.h
+@@ -402,6 +402,7 @@ enum ssh_options_e {
+   SSH_OPTIONS_GSSAPI_AUTH,
+   SSH_OPTIONS_GLOBAL_KNOWNHOSTS,
+   SSH_OPTIONS_NODELAY,
++  SSH_OPTIONS_CCALGO,
+   SSH_OPTIONS_PUBLICKEY_ACCEPTED_TYPES,
+   SSH_OPTIONS_PROCESS_CONFIG,
+   SSH_OPTIONS_REKEY_DATA,
+@@ -833,6 +834,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
+ LIBSSH_API const char* ssh_get_hmac_out(ssh_session session);
+ 
+ LIBSSH_API ssh_buffer ssh_buffer_new(void);
++LIBSSH_API ssh_buffer ssh_buffer_new_size(uint32_t size, uint32_t headroom);
+ LIBSSH_API void ssh_buffer_free(ssh_buffer buffer);
+ #define SSH_BUFFER_FREE(x) \
+     do { if ((x) != NULL) { ssh_buffer_free(x); x = NULL; } } while(0)
+@@ -843,6 +845,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
+ LIBSSH_API uint32_t ssh_buffer_get_len(ssh_buffer buffer);
+ LIBSSH_API int ssh_session_set_disconnect_message(ssh_session session, const char *message);
+ 
++typedef ssize_t (*ssh_add_func) (void *ptr, size_t max_bytes, void *userdata);
++
+ #ifndef LIBSSH_LEGACY_0_4
+ #include "libssh/legacy.h"
+ #endif
+diff --git a/include/libssh/session.h b/include/libssh/session.h
+index 97936195..e4a7f80c 100644
+--- a/include/libssh/session.h
++++ b/include/libssh/session.h
+@@ -258,6 +258,7 @@ struct ssh_session_struct {
+         int flags;
+         int exp_flags;
+         int nodelay;
++        char *ccalgo;
+         bool config_processed;
+         uint8_t options_seen[SOC_MAX];
+         uint64_t rekey_data;
+diff --git a/include/libssh/sftp.h b/include/libssh/sftp.h
+index c713466e..e27fe326 100644
+--- a/include/libssh/sftp.h
++++ b/include/libssh/sftp.h
+@@ -565,6 +565,10 @@ LIBSSH_API int sftp_async_read(sftp_file file, void *data, uint32_t len, uint32_
+  */
+ LIBSSH_API ssize_t sftp_write(sftp_file file, const void *buf, size_t count);
+ 
++LIBSSH_API ssize_t sftp_async_write(sftp_file file, ssh_add_func f, size_t count,
++				    void *userdata, uint32_t* id);
++LIBSSH_API int sftp_async_write_end(sftp_file file, uint32_t id, int blocking);
++
+ /**
+  * @brief Seek to a specific location in a file.
+  *
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 807313b5..86487087 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -448,6 +448,11 @@ if (BUILD_STATIC_LIB)
+   if (WIN32)
+     target_compile_definitions(ssh-static PUBLIC "LIBSSH_STATIC")
+   endif (WIN32)
++
++  install(TARGETS ssh-static
++	  EXPORT libssh-config
++	  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
++	  COMPONENT libraries)
+ endif (BUILD_STATIC_LIB)
+ 
+ message(STATUS "Threads_FOUND=${Threads_FOUND}")
+diff --git a/src/buffer.c b/src/buffer.c
+index 8991e006..e0414801 100644
+--- a/src/buffer.c
++++ b/src/buffer.c
+@@ -142,6 +142,40 @@ struct ssh_buffer_struct *ssh_buffer_new(void)
+     return buf;
+ }
+ 
++/**
++ * @brief Create a new SSH buffer with a specified size and headroom.
++ *
++ * @param[in] len       length for newly initialized SSH buffer.
++ * @param[in] headroom  length for headroom
++ * @return A newly initialized SSH buffer, NULL on error.
++ */
++struct ssh_buffer_struct *ssh_buffer_new_size(uint32_t len, uint32_t headroom)
++{
++    struct ssh_buffer_struct *buf = NULL;
++    int rc;
++
++    if (len < headroom)
++	    return NULL;
++
++    buf = calloc(1, sizeof(struct ssh_buffer_struct));
++    if (buf == NULL) {
++        return NULL;
++    }
++
++    rc = ssh_buffer_allocate_size(buf, len);
++    if (rc != 0) {
++        SAFE_FREE(buf);
++        return NULL;
++    }
++
++    buf->pos += headroom;
++    buf->used += headroom;
++
++    buffer_verify(buf);
++
++    return buf;
++}
++
+ /**
+  * @brief Deallocate a SSH buffer.
+  *
+@@ -329,6 +363,49 @@ int ssh_buffer_add_data(struct ssh_buffer_struct *buffer, const void *data, uint
+     return 0;
+ }
+ 
++/**
++ * @brief Add data at the tail of a buffer by an external function
++ *
++ * @param[in]  buffer    The buffer to add data.
++ *
++ * @param[in]  f         function that adds data to the buffer.
++ *
++ * @param[in]  max_bytes The maximum length of the data to add.
++ *
++ * @return               actual bytes added on success, < 0 on error.
++ */
++ssize_t ssh_buffer_add_func(struct ssh_buffer_struct *buffer, ssh_add_func f,
++			    size_t max_bytes, void *userdata)
++{
++    ssize_t actual;
++
++    if (buffer == NULL) {
++        return -1;
++    }
++
++    buffer_verify(buffer);
++
++    if (buffer->used + max_bytes < max_bytes) {
++        return -1;
++    }
++
++    if (buffer->allocated < (buffer->used + max_bytes)) {
++        if (buffer->pos > 0) {
++            buffer_shift(buffer);
++        }
++        if (realloc_buffer(buffer, buffer->used + max_bytes) < 0) {
++            return -1;
++        }
++    }
++
++    if ((actual = f(buffer->data + buffer->used, max_bytes, userdata)) < 0)
++      return -1;
++
++    buffer->used += actual;
++    buffer_verify(buffer);
++    return actual;
++}
++
+ /**
+  * @brief Ensure the buffer has at least a certain preallocated size.
+  *
+diff --git a/src/connect.c b/src/connect.c
+index 15cae644..e7520f40 100644
+--- a/src/connect.c
++++ b/src/connect.c
+@@ -156,6 +156,20 @@ static int set_tcp_nodelay(socket_t socket)
+                       sizeof(opt));
+ }
+ 
++static int set_tcp_ccalgo(socket_t socket, const char *ccalgo)
++{
++#ifdef HAVE_TCP_CONGESTION
++	return setsockopt(socket,
++			  IPPROTO_TCP,
++			  TCP_CONGESTION,
++			  (void *)ccalgo,
++			  strlen(ccalgo));
++#else
++	errno = ENOTSUP;
++	return -1;
++#endif
++}
++
+ /**
+  * @internal
+  *
+@@ -256,6 +270,18 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
+             }
+         }
+ 
++        if (session->opts.ccalgo) {
++	     rc = set_tcp_ccalgo(s, session->opts.ccalgo);
++	     if (rc < 0) {
++		 ssh_set_error(session, SSH_FATAL,
++			       "Failed to set TCP_CONGESTION on socket: %s",
++			       ssh_strerror(errno, err_msg, SSH_ERRNO_MSG_MAX));
++		 ssh_connect_socket_close(s);
++		 s = -1;
++		 continue;
++	     }
++	}
++
+         errno = 0;
+         rc = connect(s, itr->ai_addr, itr->ai_addrlen);
+         if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
+diff --git a/src/options.c b/src/options.c
+index 38511455..a183605d 100644
+--- a/src/options.c
++++ b/src/options.c
+@@ -217,6 +217,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest)
+     new->opts.gss_delegate_creds    = src->opts.gss_delegate_creds;
+     new->opts.flags                 = src->opts.flags;
+     new->opts.nodelay               = src->opts.nodelay;
++    new->opts.ccalgo                = src->opts.ccalgo;
+     new->opts.config_processed      = src->opts.config_processed;
+     new->common.log_verbosity       = src->common.log_verbosity;
+     new->common.callbacks           = src->common.callbacks;
+@@ -458,6 +459,10 @@ int ssh_options_set_algo(ssh_session session,
+  *                Set it to disable Nagle's Algorithm (TCP_NODELAY) on the
+  *                session socket. (int, 0=false)
+  *
++ *              - SSH_OPTIONS_CCALGO
++ *                Set it to specify TCP congestion control algorithm on the
++ *                session socket (Linux only). (int, 0=false)
++ *
+  *              - SSH_OPTIONS_PROCESS_CONFIG
+  *                Set it to false to disable automatic processing of per-user
+  *                and system-wide OpenSSH configuration files. LibSSH
+@@ -1023,6 +1028,20 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
+                 session->opts.nodelay = (*x & 0xff) > 0 ? 1 : 0;
+             }
+             break;
++	case SSH_OPTIONS_CCALGO:
++            v = value;
++            if (v == NULL || v[0] == '\0') {
++                ssh_set_error_invalid(session);
++                return -1;
++            } else {
++                SAFE_FREE(session->opts.ccalgo);
++                session->opts.ccalgo = strdup(v);
++                if (session->opts.ccalgo == NULL) {
++                    ssh_set_error_oom(session);
++                    return -1;
++                }
++            }
++            break;
+         case SSH_OPTIONS_PROCESS_CONFIG:
+             if (value == NULL) {
+                 ssh_set_error_invalid(session);
+diff --git a/src/session.c b/src/session.c
+index 8c509699..88602b6a 100644
+--- a/src/session.c
++++ b/src/session.c
+@@ -108,6 +108,7 @@ ssh_session ssh_new(void)
+     session->opts.fd = -1;
+     session->opts.compressionlevel = 7;
+     session->opts.nodelay = 0;
++    session->opts.ccalgo = NULL;
+ 
+     session->opts.flags = SSH_OPT_FLAG_PASSWORD_AUTH |
+                           SSH_OPT_FLAG_PUBKEY_AUTH |
+diff --git a/src/sftp.c b/src/sftp.c
+index e01012a8..702623a0 100644
+--- a/src/sftp.c
++++ b/src/sftp.c
+@@ -2228,6 +2228,132 @@ ssize_t sftp_write(sftp_file file, const void *buf, size_t count) {
+   return -1; /* not reached */
+ }
+ 
++/*
++ * sftp_async_write is based on and sftp_async_write_end is copied from
++ * https://github.com/limes-datentechnik-gmbh/libssh
++ *
++ * sftp_async_write has some optimizations:
++ * - use ssh_buffer_new_size() to reduce realoc_buffer.
++ * - use ssh_buffer_add_func() to avoid memcpy from read buffer to ssh buffer.
++ */
++ssize_t sftp_async_write(sftp_file file, ssh_add_func f, size_t count, void *userdata,
++			 uint32_t* id) {
++  sftp_session sftp = file->sftp;
++  ssh_buffer buffer;
++  uint32_t buf_sz;
++  ssize_t actual;
++  int len;
++  int packetlen;
++  int rc;
++
++#define HEADROOM 16
++  /* sftp_packet_write() prepends a 5-bytes (uint32_t length and
++   * 1-byte type) header to the head of the payload by
++   * ssh_buffer_prepend_data(). Inserting headroom by
++   * ssh_buffer_new_size() eliminates memcpy for prepending the
++   * header.
++   */
++
++  buf_sz = (HEADROOM + /* for header */
++	    sizeof(uint32_t) + /* id */
++	    ssh_string_len(file->handle) + 4 + /* file->handle */
++	    sizeof(uint64_t) + /* file->offset */
++	    sizeof(uint32_t) + /* count */
++	    count); /* datastring */
++
++  buffer = ssh_buffer_new_size(buf_sz, HEADROOM);
++  if (buffer == NULL) {
++    ssh_set_error_oom(sftp->session);
++    return -1;
++  }
++
++  *id = sftp_get_new_id(file->sftp);
++
++  rc = ssh_buffer_pack(buffer,
++                       "dSqd",
++                       *id,
++                       file->handle,
++                       file->offset,
++                       count); /* len of datastring */
++
++  if (rc != SSH_OK){
++    ssh_set_error_oom(sftp->session);
++    ssh_buffer_free(buffer);
++    return SSH_ERROR;
++  }
++
++  actual = ssh_buffer_add_func(buffer, f, count, userdata);
++  if (actual < 0){
++    ssh_set_error_oom(sftp->session);
++    ssh_buffer_free(buffer);
++    return SSH_ERROR;
++  }
++
++  packetlen=ssh_buffer_get_len(buffer)+5;
++  len = sftp_packet_write(file->sftp, SSH_FXP_WRITE, buffer);
++  ssh_buffer_free(buffer);
++  if (len < 0) {
++    return SSH_ERROR;
++  } else  if (len != packetlen) {
++    ssh_set_error(sftp->session, SSH_FATAL,
++      "Could only send %d of %d bytes to remote host!", len, packetlen);
++    SSH_LOG(SSH_LOG_PACKET,
++        "Could not write as much data as expected");
++    return SSH_ERROR;
++  }
++
++  file->offset += actual;
++
++  return actual;
++}
++
++int sftp_async_write_end(sftp_file file, uint32_t id, int blocking) {
++  sftp_session sftp = file->sftp;
++  sftp_message msg = NULL;
++  sftp_status_message status;
++
++  msg = sftp_dequeue(sftp, id);
++  while (msg == NULL) {
++    if (!blocking && ssh_channel_poll(sftp->channel, 0) == 0) {
++      /* we cannot block */
++      return SSH_AGAIN;
++    }
++    if (sftp_read_and_dispatch(sftp) < 0) {
++      /* something nasty has happened */
++      return SSH_ERROR;
++    }
++    msg = sftp_dequeue(sftp, id);
++  }
++
++  switch (msg->packet_type) {
++    case SSH_FXP_STATUS:
++      status = parse_status_msg(msg);
++      sftp_message_free(msg);
++      if (status == NULL) {
++        return SSH_ERROR;
++      }
++      sftp_set_error(sftp, status->status);
++      switch (status->status) {
++        case SSH_FX_OK:
++          status_msg_free(status);
++          return SSH_OK;
++        default:
++          break;
++      }
++      ssh_set_error(sftp->session, SSH_REQUEST_DENIED,
++          "SFTP server: %s", status->errormsg);
++      status_msg_free(status);
++      return SSH_ERROR;
++    default:
++      ssh_set_error(sftp->session, SSH_FATAL,
++          "Received message %d during write!", msg->packet_type);
++      sftp_message_free(msg);
++      return SSH_ERROR;
++  }
++
++  return SSH_ERROR; /* not reached */
++}
++
+ /* Seek to a specific location in a file. */
+ int sftp_seek(sftp_file file, uint32_t new_offset) {
+   if (file == NULL) {

rpm/.gitignore

@@ -0,0 +1,3 @@
+
+# generated by cmake
+mscp.spec

rpm/mscp.spec.in

@@ -0,0 +1,48 @@
+Name:		mscp
+Version:	@MSCP_VERSION@
+Release:	1%{?dist}
+Summary:	mscp, fast file transfer over multiple SSH connections
+
+Group:		Applications/Internet
+License:	GPLv3
+URL:		https://github.com/upa/mscp
+Source0:	%{name}-%{version}.tar.gz
+
+BuildRequires:	gcc make cmake zlib-devel openssl-devel
+Requires:	glibc crypto-policies krb5-libs openssl-libs libcom_err
+
+%description
+mscp transfers files over multiple SSH connections. Multiple threads
+and connections in mscp transfer (1) multiple files simultaneously
+and (2) a large file in parallel. It would shorten the waiting time
+for transferring a lot of/large files over networks.
+
+
+%global debug_package %{nil}
+
+%prep
+%setup -q
+
+
+%build
+cmake -S . -B build -DINSTALL_EXECUTABLE_ONLY=ON
+make -C build %{?_smp_mflags}
+
+
+%install
+make -C build install DESTDIR=%{buildroot}
+
+%files
+/usr/local/bin/mscp
+/usr/local/share/man/man1/mscp.1
+
+
+%changelog
+* Thu Mar 14 2024 Ryo Nakamura <upa@haeena.net> - 0.1.5-0
+- RPM release for v0.1.5
+
+* Wed Feb 07 2024 Ryo Nakamura <upa@haeena.net> - 0.1.4-0
+- RPM release for v0.1.4
+
+* Sat Feb 03 2024 Ryo Nakamura <upa@haeena.net> - 0.1.3-0
+- Initial release for rpm packaging

scripts/install-build-deps.sh

@@ -1,30 +1,73 @@
-#!/bin/bash -eu
+#!/usr/bin/env bash
 #
 # Install build dpenedencies.
 
+set -e
+#set -u
+
+function print_help() {
+	echo "$0 [options]"
+	echo "    --dont-install         Print required packages."
+	echo "    --platform [PLATFORM]  PLATFORM is Kernel-ID, e.g., Linux-ubuntu."
+	echo "                           Automatically detected if not specified."
+}
+
 platform=$(uname -s)
+doinstall=1
 
 if [ -e /etc/os-release ]; then
 	source /etc/os-release
 	platform=${platform}-${ID}
 fi
 
-set -x
+while getopts h-: opt; do
+        optarg="${!OPTIND}"
+        [[ "$opt" = - ]] && opt="-$OPTARG"
+	case "-${opt}" in
+		--dont-install)
+			doinstall=0
+			;;
+		--platform)
+			platform=$optarg
+			shift
+			;;
+		-h)
+			print_help
+			exit 0
+			;;
+		*)
+			print_help
+			exit 1
+			;;
+	esac
+done
 
 case $platform in
 	Darwin)
-		brew install openssl@1.1
+		cmd="brew install"
+		pkgs="openssl@1.1"
 		;;
 	Linux-ubuntu*)
-		apt-get install -y \
-			gcc make cmake zlib1g-dev libssl-dev libkrb5-dev
+		cmd="apt-get install --no-install-recommends -y"
+		pkgs="gcc make cmake zlib1g-dev libssl-dev libkrb5-dev"
 		;;
 	Linux-centos* | Linux-rhel* | Linux-rocky* | Linux-almalinux)
-		yum install -y \
-			gcc make cmake zlib-devel openssl-devel rpm-build
+		cmd="yum install -y"
+		pkgs="gcc make cmake zlib-devel openssl-devel rpm-build"
+		;;
+	FreeBSD-freebsd)
+		cmd="pkg install"
+		pkgs="cmake"
 		;;
 	*)
 		echo "unsupported platform: $platform"
 		exit 1
 		;;
 esac
+
+if [ $doinstall -gt 0 ]; then
+	echo do "$cmd $pkgs"
+	$cmd $pkgs
+else
+	echo $pkgs
+fi

scripts/print-install-deps.sh

@@ -1,23 +0,0 @@
-#!/bin/bash -e
-#
-# Print install dpenedencies on Linux. CMake runs this script to obtain deps for CPACK.
-# mscp dependes on packages on which libssh depends.
-
-source /etc/os-release
-
-release=$1
-
-case $release in
-	ubuntu-20.04*)
-		echo "libc6 (>= 2.27), libgssapi-krb5-2 (>= 1.17), libssl1.1 (>= 1.1.1), zlib1g (>= 1:1.1.4)"
-		;;
-	ubuntu-22.04*)
-		echo "libc6 (>= 2.33), libgssapi-krb5-2 (>= 1.17), libssl3 (>= 3.0.0~~alpha1), zlib1g (>= 1:1.1.4)"
-		;;
-	centos* | rhel* | rocky* | almalinux*)
-		echo "glibc crypto-policies krb5-libs openssl-libs libcom_err"
-		;;
-	*)
-		echo "$(basename $0): unsupported install dependency: $release"
-		exit 1
-esac

scripts/test-in-container.sh

@@ -8,6 +8,10 @@ cd $script_dir
 
 set -x
 
+# sshd Linsten on 22 and 8022
+echo "Port 22" >> /etc/ssh/sshd_config
+echo "Port 8022" >> /etc/ssh/sshd_config
+
 # Run sshd
 if [ ! -e /var/run/sshd.pid ]; then
 	/usr/sbin/sshd
@@ -15,6 +19,8 @@ if [ ! -e /var/run/sshd.pid ]; then
 fi
 
 ssh-keyscan localhost >> ${HOME}/.ssh/known_hosts
+ssh-keyscan 127.0.0.1 >> ${HOME}/.ssh/known_hosts
+ssh-keyscan ::1 >> ${HOME}/.ssh/known_hosts
 
 # Run test
-python3 -m pytest ../test -v
+python3 -m pytest -v ../test 

setup.py

@@ -1,34 +0,0 @@
-from setuptools import setup, Extension, find_packages
-import sys
-import os
-
-mypackage_root_dir = os.path.dirname(__file__)
-with open(os.path.join(mypackage_root_dir, 'VERSION')) as version_file:
-    version = version_file.read().strip()
-
-if sys.platform == "linux":
-    libmscp = "libmscp.so"
-elif sys.platform == "darwin":
-    libmscp = "libmscp.dylib"
-
-setup(
-    name='mscp',
-    version = version,
-    description = "libmscp python binding",
-    author = "Ryo Nakamura",
-    author_email = "upa@haeena.net",
-    url = "https://github.com/upa/mscp",
-    packages = find_packages("mscp"),
-    package_dir = {"": "mscp"},
-    data_files = [ ("", ["build/" + libmscp])],
-    py_modules = [ "mscp" ],
-    ext_modules = [
-        Extension(
-            'pymscp',
-            ['src/pymscp.c'],
-            library_dirs = ['build'],
-            libraries = ['mscp'],
-            include_dirs = ['include']
-        )
-    ]
-)

src/atomic.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifndef _ATOMIC_H_
 #define _ATOMIC_H_
 
@@ -5,8 +6,6 @@
 #include <assert.h>
 #include <pthread.h>
 
-#include <message.h>
-
 typedef int refcnt;
 
 static inline void refcnt_inc(refcnt *cnt)
@@ -19,7 +18,6 @@ static inline refcnt refcnt_dec(refcnt *cnt)
 	return __sync_sub_and_fetch(cnt, 1);
 }
 
-
 /* mutex */
 
 typedef pthread_mutex_t lock;
@@ -46,14 +44,11 @@ static inline void lock_release_via_cleanup(void *l)
 	lock_release(l);
 }
 
-#define LOCK_ACQUIRE(l)						\
-	lock_acquire(l);					\
+#define LOCK_ACQUIRE(l)  \
+	lock_acquire(l); \
 	pthread_cleanup_push(lock_release_via_cleanup, l)
 
-#define LOCK_RELEASE()				\
-	pthread_cleanup_pop(1)
-
-
+#define LOCK_RELEASE() pthread_cleanup_pop(1)
 
 /* read/write lock */
 typedef pthread_rwlock_t rwlock;
@@ -86,18 +81,14 @@ static inline void rwlock_release_via_cleanup(void *rw)
 	rwlock_release(rw);
 }
 
-#define RWLOCK_READ_ACQUIRE(rw)						\
-	rwlock_read_acquire(rw);					\
+#define RWLOCK_READ_ACQUIRE(rw)  \
+	rwlock_read_acquire(rw); \
 	pthread_cleanup_push(rwlock_release_via_cleanup, rw)
 
-#define RWLOCK_WRITE_ACQUIRE(rw)					\
-	rwlock_write_acquire(rw);					\
+#define RWLOCK_WRITE_ACQUIRE(rw)  \
+	rwlock_write_acquire(rw); \
 	pthread_cleanup_push(rwlock_release_via_cleanup, rw)
 
-
-#define RWLOCK_RELEASE()			\
-	pthread_cleanup_pop(1)
-
-
+#define RWLOCK_RELEASE() pthread_cleanup_pop(1)
 
 #endif /* _ATOMIC_H_ */

src/checkpoint.c

@@ -0,0 +1,503 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#include <fcntl.h>
+#include <sys/uio.h>
+#include <arpa/inet.h>
+
+#include <path.h>
+#include <print.h>
+#include <platform.h>
+#include <strerrno.h>
+#include <openbsd-compat/openbsd-compat.h>
+
+#include <checkpoint.h>
+
+#define MSCP_CHECKPOINT_MAGIC 0x7063736dUL /* mscp in ascii */
+#define MSCP_CHECKPOINT_VERSION 0x1
+
+/**
+ * mscp checkpoint file format. All values are network byte order.
+ *
+ * The file starts with the File header:
+ * 0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +---------------------------------------------------------------+
+ * |                          Magic Code                           |
+ * +---------------+-----------------------------------------------+
+ * |     Version   |
+ * +---------------+
+ *
+ * Magic code: 0x7063736dUL
+ *
+ * Version: 1.
+ *
+ *
+ * Each object in a checkpoint always starts with an object header:
+ * +---------------+---------------+-------------------------------+
+ * |     Type      |      rsv      |             Length            |
+ * +---------------+---------------+-------------------------------+
+ *
+ * Type: 0x0A (meta), 0x0B (path), or 0x0C (chunk)
+ *
+ * Rsv: reserved
+ *
+ * Length: Length of this object including the object header.
+ *
+ *
+ * Meta object provides generaic information for the failed copy:
+ * +---------------+---------------+-------------------------------+
+ * |     Type      |      rsv      |             Length            |
+ * +---------------+---------------+-------------------------------+
+ * |  Direction    | Remote string ...
+ * +---------------+------------------
+ *
+ * Direction: 1 (Local-to-Remote copy) or 2 (Remote-to-Local copy)
+ *
+ * Remote string: Remote host, e.g., user@hostname and IP address,
+ * string including '\0'.
+ *
+ *
+ * Path object represnts a file with sourcen and destination paths:
+ * +---------------+---------------+-------------------------------+
+ * |     Type      |      rsv      |             Length            |
+ * +---------------+---------------+-------------------------------+
+ * |                             Index                             |
+ * +-------------------------------+-------------------------------+
+ * |         Source offset         |      Destination offset       |
+ * +-------------------------------+-------------------------------+
+ * //                                                             //
+ * //                     Source path string                      //
+ * //                                                             //
+ * +---------------------------------------------------------------+
+ * //                                                             //
+ * //                   Destination path string                   //
+ * //                                                             //
+ * +---------------------------------------------------------------+
+ *
+ * Index: 32-bit unsigned int indicating this path (used by chunks)
+ *
+ * Source offset: Offset of the Source path string from the head of
+ * this object. It is identical to the end of the Destination offset
+ * filed.
+ *
+ * Destination offset: Offset of the Destnation path string from the
+ * head of this object. It also indicates the end of the Source path
+ * string.
+ *
+ * Source path string: String of copy source path (including '\0').
+ *
+ * Destination path string: string of copy destination path (including
+ * '\0').
+ *
+ *
+ * Chunk object represents a chunk associated with a path object:
+ * +---------------+---------------+-------------------------------+
+ * |     Type      |      rsv      |             Length            |
+ * +---------------+---------------+-------------------------------+
+ * |                             Index                             |
+ * +---------------------------------------------------------------+
+ * |                             Chunk                             |
+ * |                             offset                            |
+ * +---------------------------------------------------------------+
+ * |                             Chunk                             |
+ * |                             length                            |
+ * +---------------------------------------------------------------+
+ *
+ * Index: 32 bit unsigned int indicating the index of a path object
+ * this chunk associated with.
+ *
+ * Chunk offset: 64 bit unsigned int indicating the offset of this
+ * chunk from the head of the associating a file.
+ *
+ * Chunk length: 64 bit unsigned int indicating the length (bytes) of
+ * this chunk.
+ */
+
+enum {
+	OBJ_TYPE_META = 0x0A,
+	OBJ_TYPE_PATH = 0x0B,
+	OBJ_TYPE_CHUNK = 0x0C,
+};
+
+struct checkpoint_file_hdr {
+	uint32_t magic;
+	uint8_t version;
+} __attribute__((packed));
+
+struct checkpoint_obj_hdr {
+	uint8_t type;
+	uint8_t rsv;
+	uint16_t len; /* length of an object including this hdr */
+} __attribute__((packed));
+
+struct checkpoint_obj_meta {
+	struct checkpoint_obj_hdr hdr;
+	uint8_t direction; /* L2R or R2L */
+
+	char remote[0];
+} __attribute__((packed));
+
+struct checkpoint_obj_path {
+	struct checkpoint_obj_hdr hdr;
+
+	uint32_t idx;
+	uint16_t src_off; /* offset to the src path string (including
+			   * \0) from the head of this object. */
+	uint16_t dst_off; /* offset to the dst path string (including
+			   * \0) from the head of this object */
+} __attribute__((packed));
+
+#define obj_path_src(o) ((char *)(o) + ntohs(o->src_off))
+#define obj_path_dst(o) ((char *)(o) + ntohs(o->dst_off))
+
+#define obj_path_src_len(o) (ntohs(o->dst_off) - ntohs(o->src_off))
+#define obj_path_dst_len(o) (ntohs(o->hdr.len) - ntohs(o->dst_off))
+
+#define obj_path_validate(o)				\
+	((ntohs(o->hdr.len) > ntohs(o->dst_off)) &&	\
+	 (ntohs(o->dst_off) > ntohs(o->src_off)) &&	\
+	 (obj_path_src_len(o) < PATH_MAX) &&		\
+	 (obj_path_dst_len(o) < PATH_MAX))
+
+struct checkpoint_obj_chunk {
+	struct checkpoint_obj_hdr hdr;
+
+	uint32_t idx; /* index indicating associating path */
+	uint64_t off;
+	uint64_t len;
+} __attribute__((packed));
+
+#define CHECKPOINT_OBJ_MAXLEN (sizeof(struct checkpoint_obj_path) + PATH_MAX * 2)
+
+static int checkpoint_write_path(int fd, struct path *p, unsigned int idx)
+{
+	char buf[CHECKPOINT_OBJ_MAXLEN];
+	struct checkpoint_obj_path *path = (struct checkpoint_obj_path *)buf;
+	size_t src_len, dst_len;
+	struct iovec iov[3];
+
+	p->data = idx; /* save idx to be pointed by chunks */
+
+	src_len = strlen(p->path) + 1;
+	dst_len = strlen(p->dst_path) + 1;
+
+	memset(buf, 0, sizeof(buf));
+	path->hdr.type = OBJ_TYPE_PATH;
+	path->hdr.len = htons(sizeof(*path) + src_len + dst_len);
+
+	path->idx = htonl(idx);
+	path->src_off = htons(sizeof(*path));
+	path->dst_off = htons(sizeof(*path) + src_len);
+
+	iov[0].iov_base = path;
+	iov[0].iov_len = sizeof(*path);
+	iov[1].iov_base = p->path;
+	iov[1].iov_len = src_len;
+	iov[2].iov_base = p->dst_path;
+	iov[2].iov_len = dst_len;
+
+	if (writev(fd, iov, 3) < 0) {
+		priv_set_errv("writev: %s", strerrno());
+		return -1;
+	}
+	return 0;
+}
+
+static int checkpoint_write_chunk(int fd, struct chunk *c)
+{
+	struct checkpoint_obj_chunk chunk;
+
+	memset(&chunk, 0, sizeof(chunk));
+	chunk.hdr.type = OBJ_TYPE_CHUNK;
+	chunk.hdr.len = htons(sizeof(chunk));
+
+	chunk.idx = htonl(c->p->data); /* index stored by checkpoint_write_path */
+	chunk.off = htonll(c->off);
+	chunk.len = htonll(c->len);
+
+	if (write(fd, &chunk, sizeof(chunk)) < 0) {
+		priv_set_errv("writev: %s", strerrno());
+		return -1;
+	}
+	return 0;
+}
+
+int checkpoint_save(const char *pathname, int dir, const char *user, const char *remote,
+		    pool *path_pool, pool *chunk_pool)
+{
+	struct checkpoint_file_hdr hdr;
+	struct checkpoint_obj_meta meta;
+	struct iovec iov[3];
+	struct chunk *c;
+	struct path *p;
+	char buf[1024];
+	unsigned int i, nr_paths, nr_chunks;
+	int fd, ret;
+
+	fd = open(pathname, O_WRONLY | O_CREAT | O_TRUNC,
+		  S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+	if (fd < 0) {
+		priv_set_errv("open: %s: %s", pathname, strerrno());
+		return -1;
+	}
+
+	/* write file hdr */
+	hdr.magic = htonl(MSCP_CHECKPOINT_MAGIC);
+	hdr.version = MSCP_CHECKPOINT_VERSION;
+
+	/* write meta */
+	if (user)
+		ret = snprintf(buf, sizeof(buf), "%s@%s", user, remote);
+	else
+		ret = snprintf(buf, sizeof(buf), "%s", remote);
+	if (ret >= sizeof(buf)) {
+		priv_set_errv("too long username and/or remote");
+		return -1;
+	}
+
+	memset(&meta, 0, sizeof(meta));
+	meta.hdr.type = OBJ_TYPE_META;
+	meta.hdr.len = htons(sizeof(meta) + strlen(buf) + 1);
+	meta.direction = dir;
+
+	iov[0].iov_base = &hdr;
+	iov[0].iov_len = sizeof(hdr);
+	iov[1].iov_base = &meta;
+	iov[1].iov_len = sizeof(meta);
+	iov[2].iov_base = buf;
+	iov[2].iov_len = strlen(buf) + 1;
+
+	if (writev(fd, iov, 3) < 0) {
+		priv_set_errv("writev: %s", strerrno());
+		return -1;
+	}
+
+	/* write paths */
+	nr_paths = 0;
+	pool_for_each(path_pool, p, i) {
+		if (p->state == FILE_STATE_DONE)
+			continue;
+		if (checkpoint_write_path(fd, p, i) < 0)
+			return -1;
+		nr_paths++;
+	}
+
+	/* write chunks */
+	nr_chunks = 0;
+	pool_for_each(chunk_pool, c, i) {
+		if (c->state == CHUNK_STATE_DONE)
+			continue;
+		if (checkpoint_write_chunk(fd, c) < 0)
+			return -1;
+		nr_chunks++;
+	}
+
+	pr_notice("checkpoint: %u paths and %u chunks saved", nr_paths, nr_chunks);
+
+	return 0;
+}
+
+static int checkpoint_load_meta(struct checkpoint_obj_hdr *hdr, char *remote, size_t len,
+				int *dir)
+{
+	struct checkpoint_obj_meta *meta = (struct checkpoint_obj_meta *)hdr;
+
+	if (len < ntohs(hdr->len) - sizeof(*meta)) {
+		priv_set_errv("too short buffer");
+		return -1;
+	}
+	snprintf(remote, len, "%s", meta->remote);
+	*dir = meta->direction;
+
+	pr_notice("checkpoint: remote=%s direction=%s", meta->remote,
+		  meta->direction == MSCP_DIRECTION_L2R ? "local-to-remote" :
+		  meta->direction == MSCP_DIRECTION_R2L ? "remote-to-local" :
+							  "invalid");
+
+	return 0;
+}
+
+static int checkpoint_load_path(struct checkpoint_obj_hdr *hdr, pool *path_pool)
+{
+	struct checkpoint_obj_path *path = (struct checkpoint_obj_path *)hdr;
+	struct path *p;
+	char *s, *d;
+
+	if (!obj_path_validate(path)) {
+		priv_set_errv("invalid path object");
+		return -1;
+	}
+
+	if (!(s = strndup(obj_path_src(path), obj_path_src_len(path)))) {
+		priv_set_errv("strdup: %s", strerrno());
+		return -1;
+	}
+
+	if (!(d = strndup(obj_path_dst(path), obj_path_dst_len(path)))) {
+		priv_set_errv("strdup: %s", strerrno());
+		free(s);
+		return -1;
+	}
+
+	if (!(p = alloc_path(s, d))) {
+		free(s);
+		free(d);
+		return -1;
+	}
+
+	if (pool_push(path_pool, p) < 0) {
+		priv_set_errv("pool_push: %s", strerrno());
+		return -1;
+	}
+
+	pr_info("checkpoint:file: %s -> %s", p->path, p->dst_path);
+
+	return 0;
+}
+
+static int checkpoint_load_chunk(struct checkpoint_obj_hdr *hdr, pool *path_pool,
+				 pool *chunk_pool)
+{
+	struct checkpoint_obj_chunk *chunk = (struct checkpoint_obj_chunk *)hdr;
+	struct chunk *c;
+	struct path *p;
+
+	if (!(p = pool_get(path_pool, ntohl(chunk->idx)))) {
+		/* we assumes all paths are already loaded in the order */
+		priv_set_errv("path index %u not found", ntohl(chunk->idx));
+		return -1;
+	}
+
+	if (!(c = alloc_chunk(p, ntohll(chunk->off), ntohll(chunk->len))))
+		return -1;
+
+	if (pool_push(chunk_pool, c) < 0) {
+		priv_set_errv("pool_push: %s", strerrno());
+		return -1;
+	}
+
+	pr_debug("checkpoint:chunk: %s 0x%lx-0x%lx", p->path, c->off, c->off + c->len);
+
+	return 0;
+}
+
+static int checkpoint_read_obj(int fd, void *buf, size_t count)
+{
+	struct checkpoint_obj_hdr *hdr = (struct checkpoint_obj_hdr *)buf;
+	ssize_t ret, objlen, objbuflen;
+
+	memset(buf, 0, count);
+
+	if (count < sizeof(*hdr)) {
+		priv_set_errv("too short buffer");
+		return -1;
+	}
+
+	ret = read(fd, hdr, sizeof(*hdr));
+	if (ret == 0)
+		return 0; /* no more objects */
+	if (ret < 0)
+		return -1;
+
+	objlen = ntohs(hdr->len) - sizeof(*hdr);
+	objbuflen = count - sizeof(*hdr);
+	if (objbuflen < objlen) {
+		priv_set_errv("too short buffer");
+		return -1;
+	}
+
+	ret = read(fd, buf + sizeof(*hdr), objlen);
+	if (ret < objlen) {
+		priv_set_errv("checkpoint truncated");
+		return -1;
+	}
+
+	return 1;
+}
+
+static int checkpoint_read_file_hdr(int fd)
+{
+	struct checkpoint_file_hdr hdr;
+	ssize_t ret;
+
+	ret = read(fd, &hdr, sizeof(hdr));
+	if (ret < 0) {
+		priv_set_errv("read: %s", strerrno());
+		return -1;
+	}
+	if (ret < sizeof(hdr)) {
+		priv_set_errv("checkpoint truncated");
+		return -1;
+	}
+
+	if (ntohl(hdr.magic) != MSCP_CHECKPOINT_MAGIC) {
+		priv_set_errv("checkpoint: invalid megic code");
+		return -1;
+	}
+
+	if (hdr.version != MSCP_CHECKPOINT_VERSION) {
+		priv_set_errv("checkpoint: unknown version %u", hdr.version);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int checkpoint_load(const char *pathname, char *remote, size_t len, int *dir,
+			   pool *path_pool, pool *chunk_pool)
+{
+	char buf[CHECKPOINT_OBJ_MAXLEN];
+	struct checkpoint_obj_hdr *hdr;
+	int fd, ret;
+
+	if ((fd = open(pathname, O_RDONLY)) < 0) {
+		priv_set_errv("open: %s: %s", pathname, strerrno());
+		return -1;
+	}
+
+	if (checkpoint_read_file_hdr(fd) < 0)
+		return -1;
+
+	hdr = (struct checkpoint_obj_hdr *)buf;
+	while ((ret = checkpoint_read_obj(fd, buf, sizeof(buf))) > 0) {
+		switch (hdr->type) {
+		case OBJ_TYPE_META:
+			if (!remote || !dir)
+				break;
+			if (checkpoint_load_meta(hdr, remote, len, dir) < 0)
+				return -1;
+			if (!path_pool || !chunk_pool)
+				goto out;
+			break;
+		case OBJ_TYPE_PATH:
+			if (!path_pool)
+				break;
+			if (checkpoint_load_path(hdr, path_pool) < 0)
+				return -1;
+			break;
+		case OBJ_TYPE_CHUNK:
+			if (!path_pool)
+				break;
+			if (checkpoint_load_chunk(hdr, path_pool, chunk_pool) < 0)
+				return -1;
+			break;
+		default:
+			priv_set_errv("unknown obj type %u", hdr->type);
+			return -1;
+		}
+	}
+
+out:
+	close(fd);
+
+	return 0;
+}
+
+int checkpoint_load_remote(const char *pathname, char *remote, size_t len, int *dir)
+{
+	return checkpoint_load(pathname, remote, len, dir, NULL, NULL);
+}
+
+int checkpoint_load_paths(const char *pathname, pool *path_pool, pool *chunk_pool)
+{
+	return checkpoint_load(pathname, NULL, 0, NULL, path_pool, chunk_pool);
+}

src/checkpoint.h

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _CHECKPOINT_H_
+#define _CHECKPOINT_H_
+
+#include <pool.h>
+
+/* checkpoint_save() stores states to a checkponint file (pathname) */
+int checkpoint_save(const char *pathname, int dir, const char *user, const char *remote,
+		    pool *path_pool, pool *chunk_pool);
+
+/* checkpoint_load_meta() reads a checkpoint file (pathname) and returns
+ * remote host string to *remote and transfer direction to *dir.
+ */
+int checkpoint_load_remote(const char *pathname, char *remote, size_t len, int *dir);
+
+/* checkpoint_load_paths() reads a checkpoint file (pathname) and
+ * fills path_pool and chunk_pool.
+ */
+int checkpoint_load_paths(const char *pathname, pool *path_pool, pool *chunk_pool);
+
+#endif /* _CHECKPOINT_H_ */

src/fileops.c

@@ -0,0 +1,387 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/times.h>
+#include <utime.h>
+
+#include <fileops.h>
+#include <ssh.h>
+#include <print.h>
+#include <platform.h>
+
+sftp_session __thread tls_sftp;
+/* tls_sftp is used *_wrapped() functions */
+
+void set_tls_sftp_session(sftp_session sftp)
+{
+	tls_sftp = sftp;
+}
+
+static void sftp_err_to_errno(sftp_session sftp)
+{
+	int sftperr = sftp_get_error(sftp);
+
+	switch (sftperr) {
+	case SSH_FX_OK:
+	case SSH_FX_EOF:
+		errno = 0;
+		break;
+	case SSH_FX_NO_SUCH_FILE:
+	case SSH_FX_NO_SUCH_PATH:
+		errno = ENOENT;
+		break;
+	case SSH_FX_PERMISSION_DENIED:
+		errno = EACCES;
+		break;
+	case SSH_FX_FAILURE:
+		errno = EINVAL;
+	case SSH_FX_BAD_MESSAGE:
+		errno = EBADMSG;
+	case SSH_FX_NO_CONNECTION:
+		errno = ENOTCONN;
+		break;
+	case SSH_FX_CONNECTION_LOST:
+		errno = ENETRESET;
+		break;
+	case SSH_FX_OP_UNSUPPORTED:
+		errno = EOPNOTSUPP;
+		break;
+	case SSH_FX_INVALID_HANDLE:
+		errno = EBADF;
+		break;
+	case SSH_FX_FILE_ALREADY_EXISTS:
+		errno = EEXIST;
+		break;
+	case SSH_FX_WRITE_PROTECT:
+		errno = EPERM;
+		break;
+	case SSH_FX_NO_MEDIA:
+		errno = ENODEV;
+		break;
+	default:
+		pr_warn("unkown SSH_FX response %d", sftperr);
+	}
+}
+
+MDIR *mscp_opendir(const char *path, sftp_session sftp)
+{
+	MDIR *md;
+
+	if (!(md = malloc(sizeof(*md))))
+		return NULL;
+	memset(md, 0, sizeof(*md));
+
+	if (sftp) {
+		md->remote = sftp_opendir(sftp, path);
+		sftp_err_to_errno(sftp);
+		if (!md->remote) {
+			goto free_out;
+		}
+	} else {
+		md->local = opendir(path);
+		if (!md->local) {
+			goto free_out;
+		}
+	}
+
+	return md;
+
+free_out:
+	free(md);
+	return NULL;
+}
+
+MDIR *mscp_opendir_wrapped(const char *path)
+{
+	return mscp_opendir(path, tls_sftp);
+}
+
+void mscp_closedir(MDIR *md)
+{
+	int ret;
+	if (md->remote)
+		sftp_closedir(md->remote);
+	else
+		closedir(md->local);
+
+	free(md);
+}
+
+struct dirent __thread tls_dirent;
+/* tls_dirent contains dirent converted from sftp_attributes returned
+ * from sftp_readdir(). This trick is derived from openssh's
+ * fudge_readdir() */
+
+struct dirent *mscp_readdir(MDIR *md)
+{
+	sftp_attributes attr;
+	struct dirent *ret = NULL;
+	static int inum = 1;
+
+	if (md->remote) {
+		attr = sftp_readdir(md->remote->sftp, md->remote);
+		if (!attr) {
+			sftp_err_to_errno(md->remote->sftp);
+			return NULL;
+		}
+
+		memset(&tls_dirent, 0, sizeof(tls_dirent));
+		strncpy(tls_dirent.d_name, attr->name, sizeof(tls_dirent.d_name) - 1);
+		tls_dirent.d_ino = inum++;
+		if (!inum)
+			inum = 1;
+		ret = &tls_dirent;
+		sftp_attributes_free(attr);
+	} else
+		ret = readdir(md->local);
+
+	return ret;
+}
+
+int mscp_mkdir(const char *path, mode_t mode, sftp_session sftp)
+{
+	int ret;
+
+	if (sftp) {
+		ret = sftp_mkdir(sftp, path, mode);
+		sftp_err_to_errno(sftp);
+	} else
+		ret = mkdir(path, mode);
+
+	if (ret < 0 && errno == EEXIST) {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static void sftp_attr_to_stat(sftp_attributes attr, struct stat *st)
+{
+	memset(st, 0, sizeof(*st));
+	st->st_size = attr->size;
+	st->st_uid = attr->uid;
+	st->st_gid = attr->gid;
+	st->st_mode = attr->permissions;
+
+#if defined(__APPLE__)
+#define st_atim st_atimespec
+#define st_mtim st_mtimespec
+#define st_ctim st_ctimespec
+#endif
+	st->st_atim.tv_sec = attr->atime;
+	st->st_atim.tv_nsec = attr->atime_nseconds;
+	st->st_mtim.tv_sec = attr->mtime;
+	st->st_mtim.tv_nsec = attr->mtime_nseconds;
+	st->st_ctim.tv_sec = attr->createtime;
+	st->st_ctim.tv_nsec = attr->createtime_nseconds;
+
+	switch (attr->type) {
+	case SSH_FILEXFER_TYPE_REGULAR:
+		st->st_mode |= S_IFREG;
+		break;
+	case SSH_FILEXFER_TYPE_DIRECTORY:
+		st->st_mode |= S_IFDIR;
+		break;
+	case SSH_FILEXFER_TYPE_SYMLINK:
+		st->st_mode |= S_IFLNK;
+		break;
+	case SSH_FILEXFER_TYPE_SPECIAL:
+		st->st_mode |= S_IFCHR; /* or block? */
+		break;
+	case SSH_FILEXFER_TYPE_UNKNOWN:
+		st->st_mode |= S_IFIFO; /* really? */
+		break;
+	default:
+		pr_warn("unkown SSH_FILEXFER_TYPE %d", attr->type);
+	}
+}
+
+int mscp_stat(const char *path, struct stat *st, sftp_session sftp)
+{
+	sftp_attributes attr;
+	int ret = 0;
+
+	memset(st, 0, sizeof(*st));
+
+	if (sftp) {
+		attr = sftp_stat(sftp, path);
+		sftp_err_to_errno(sftp);
+		if (!attr)
+			return -1;
+
+		sftp_attr_to_stat(attr, st);
+		sftp_attributes_free(attr);
+		ret = 0;
+	} else
+		ret = stat(path, st);
+
+	return ret;
+}
+
+int mscp_stat_wrapped(const char *path, struct stat *st)
+{
+	return mscp_stat(path, st, tls_sftp);
+}
+
+int mscp_lstat(const char *path, struct stat *st, sftp_session sftp)
+{
+	sftp_attributes attr;
+	int ret = 0;
+
+	if (sftp) {
+		attr = sftp_lstat(sftp, path);
+		sftp_err_to_errno(sftp);
+		if (!attr)
+			return -1;
+
+		sftp_attr_to_stat(attr, st);
+		sftp_attributes_free(attr);
+		ret = 0;
+	} else
+		ret = lstat(path, st);
+
+	return ret;
+}
+
+int mscp_lstat_wrapped(const char *path, struct stat *st)
+{
+	return mscp_lstat(path, st, tls_sftp);
+}
+
+mf *mscp_open(const char *path, int flags, mode_t mode, sftp_session sftp)
+{
+	mf *f;
+
+	f = malloc(sizeof(*f));
+	if (!f)
+		return NULL;
+	memset(f, 0, sizeof(*f));
+
+	if (sftp) {
+		f->remote = sftp_open(sftp, path, flags, mode);
+		if (!f->remote) {
+			sftp_err_to_errno(sftp);
+			goto free_out;
+		}
+	} else {
+		f->local = open(path, flags, mode);
+		if (f->local < 0)
+			goto free_out;
+	}
+
+	return f;
+
+free_out:
+	free(f);
+	return NULL;
+}
+
+void mscp_close(mf *f)
+{
+	if (f->remote)
+		sftp_close(f->remote);
+	if (f->local > 0)
+		close(f->local);
+	free(f);
+}
+
+off_t mscp_lseek(mf *f, off_t off)
+{
+	off_t ret;
+
+	if (f->remote) {
+		ret = sftp_seek64(f->remote, off);
+		sftp_err_to_errno(f->remote->sftp);
+	} else
+		ret = lseek(f->local, off, SEEK_SET);
+
+	return ret;
+}
+
+int mscp_setstat(const char *path, struct stat *st, bool preserve_ts, sftp_session sftp)
+{
+	int ret;
+
+	if (sftp) {
+		struct sftp_attributes_struct attr;
+		memset(&attr, 0, sizeof(attr));
+		attr.permissions = st->st_mode;
+		attr.size = st->st_size;
+		attr.flags = (SSH_FILEXFER_ATTR_PERMISSIONS | SSH_FILEXFER_ATTR_SIZE);
+		if (preserve_ts) {
+			attr.atime = st->st_atim.tv_sec;
+			attr.atime_nseconds = st->st_atim.tv_nsec;
+			attr.mtime = st->st_mtim.tv_sec;
+			attr.mtime_nseconds = st->st_mtim.tv_nsec;
+			attr.flags |= (SSH_FILEXFER_ATTR_ACCESSTIME |
+				       SSH_FILEXFER_ATTR_MODIFYTIME |
+				       SSH_FILEXFER_ATTR_SUBSECOND_TIMES);
+		}
+		ret = sftp_setstat(sftp, path, &attr);
+		sftp_err_to_errno(sftp);
+	} else {
+		if ((ret = chmod(path, st->st_mode)) < 0)
+			return ret;
+		if ((ret = truncate(path, st->st_size)) < 0)
+			return ret;
+		if (preserve_ts)
+			ret = setutimes(path, st->st_atim, st->st_mtim);
+	}
+
+	return ret;
+}
+
+int mscp_glob(const char *pattern, int flags, glob_t *pglob, sftp_session sftp)
+{
+	int ret;
+	if (sftp) {
+#ifndef GLOB_ALTDIRFUNC
+#define GLOB_NOALTDIRMAGIC INT_MAX
+		/* musl does not implement GLOB_ALTDIRFUNC */
+		pglob->gl_pathc = 1;
+		pglob->gl_pathv = malloc(sizeof(char *));
+		pglob->gl_pathv[0] = strdup(pattern);
+		pglob->gl_offs = GLOB_NOALTDIRMAGIC;
+		return 0;
+#else
+		flags |= GLOB_ALTDIRFUNC;
+		set_tls_sftp_session(sftp);
+#if defined(__APPLE__) || defined(__FreeBSD__)
+		pglob->gl_opendir = (void *(*)(const char *))mscp_opendir_wrapped;
+		pglob->gl_readdir = (struct dirent * (*)(void *)) mscp_readdir;
+		pglob->gl_closedir = (void (*)(void *))mscp_closedir;
+		pglob->gl_lstat = mscp_lstat_wrapped;
+		pglob->gl_stat = mscp_stat_wrapped;
+#elif linux
+		pglob->gl_opendir = (void *(*)(const char *))mscp_opendir_wrapped;
+		pglob->gl_readdir = (void *(*)(void *))mscp_readdir;
+		pglob->gl_closedir = (void (*)(void *))mscp_closedir;
+		pglob->gl_lstat = (int (*)(const char *, void *))mscp_lstat_wrapped;
+		pglob->gl_stat = (int (*)(const char *, void *))mscp_stat_wrapped;
+#else
+#error unsupported platform
+#endif
+#endif
+	}
+
+	ret = glob(pattern, flags, NULL, pglob);
+
+	if (sftp)
+		set_tls_sftp_session(NULL);
+	return ret;
+}
+
+void mscp_globfree(glob_t *pglob)
+{
+#ifndef GLOB_ALTDIRFUNC
+	if (pglob->gl_offs == GLOB_NOALTDIRMAGIC) {
+		free(pglob->gl_pathv[0]);
+		free(pglob->gl_pathv);
+		return;
+	}
+#endif
+	globfree(pglob);
+}

src/fileops.h

@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#include <dirent.h>
+#include <sys/stat.h>
+#include <glob.h>
+
+#include <ssh.h>
+
+void set_tls_sftp_session(sftp_session sftp);
+/* sftp_session set by set_tls_sftp_session is sued in
+ mscp_open_wrapped(), mscp_stat_wrapped(), and
+ mscp_lstat_wrapped(). This _wrapped() functions exist for
+ sftp_glob() */
+
+/* directory operations */
+
+struct mdir_struct {
+	DIR *local;
+	sftp_dir remote;
+};
+typedef struct mdir_struct MDIR;
+
+MDIR *mscp_opendir(const char *path, sftp_session sftp);
+MDIR *mscp_opendir_wrapped(const char *path);
+void mscp_closedir(MDIR *md);
+struct dirent *mscp_readdir(MDIR *md);
+
+int mscp_mkdir(const char *path, mode_t mode, sftp_session sftp);
+
+/* stat operations */
+int mscp_stat(const char *path, struct stat *st, sftp_session sftp);
+int mscp_stat_wrapped(const char *path, struct stat *st);
+
+int mscp_lstat(const char *path, struct stat *st, sftp_session sftp);
+int mscp_lstat_wrapped(const char *path, struct stat *st);
+
+/* file operations */
+
+struct mf_struct {
+	sftp_file remote;
+	int local;
+};
+typedef struct mf_struct mf;
+
+mf *mscp_open(const char *path, int flags, mode_t mode, sftp_session sftp);
+void mscp_close(mf *f);
+off_t mscp_lseek(mf *f, off_t off);
+
+/* mscp_setstat() involves chmod and truncate. It executes both at
+ * once via a single SFTP command (sftp_setstat()).
+ */
+int mscp_setstat(const char *path, struct stat *st, bool preserve_ts, sftp_session sftp);
+
+/* remote glob */
+int mscp_glob(const char *pattern, int flags, glob_t *pglob, sftp_session sftp);
+void mscp_globfree(glob_t *pglob);

src/list.h

@@ -1,573 +0,0 @@
-/**
- * 
- * I grub it from linux kernel source code and fix it for user space
- * program. Of course, this is a GPL licensed header file.
- *
- * Here is a recipe to cook list.h for user space program
- *
- * 1. copy list.h from linux/include/list.h
- * 2. remove 
- *     - #ifdef __KERNE__ and its #endif
- *     - all #include line
- *     - prefetch() and rcu related functions
- * 3. add macro offsetof() and container_of
- *
- * - kazutomo@mcs.anl.gov
- */
-#ifndef _LINUX_LIST_H
-#define _LINUX_LIST_H
-
-/**
- * @name from other kernel headers
- */
-/*@{*/
-
-/**
- * Get offset of a member
- */
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-
-/**
- * Casts a member of a structure out to the containing structure
- * @param ptr        the pointer to the member.
- * @param type       the type of the container struct this is embedded in.
- * @param member     the name of the member within the struct.
- *
- */
-#define container_of(ptr, type, member) ({                      \
-        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
-        (type *)( (char *)__mptr - offsetof(type,member) );})
-/*@}*/
-
-
-/*
- * These are non-NULL pointers that will result in page faults
- * under normal circumstances, used to verify that nobody uses
- * non-initialized list entries.
- */
-#define LIST_POISON1  ((void *) 0x00100100)
-#define LIST_POISON2  ((void *) 0x00200200)
-
-/**
- * Simple doubly linked list implementation.
- *
- * Some of the internal functions ("__xxx") are useful when
- * manipulating whole lists rather than single entries, as
- * sometimes we already know the next/prev entries and we can
- * generate better code by using them directly rather than
- * using the generic single-entry routines.
- */
-struct list_head {
-	struct list_head *next, *prev;
-};
-
-#define LIST_HEAD_INIT(name) { &(name), &(name) }
-
-#define LIST_HEAD(name) \
-	struct list_head name = LIST_HEAD_INIT(name)
-
-#define INIT_LIST_HEAD(ptr) do { \
-	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
-} while (0)
-
-/*
- * Insert a new entry between two known consecutive entries.
- *
- * This is only for internal list manipulation where we know
- * the prev/next entries already!
- */
-static inline void __list_add(struct list_head *new,
-			      struct list_head *prev,
-			      struct list_head *next)
-{
-	next->prev = new;
-	new->next = next;
-	new->prev = prev;
-	prev->next = new;
-}
-
-/**
- * list_add - add a new entry
- * @new: new entry to be added
- * @head: list head to add it after
- *
- * Insert a new entry after the specified head.
- * This is good for implementing stacks.
- */
-static inline void list_add(struct list_head *new, struct list_head *head)
-{
-	__list_add(new, head, head->next);
-}
-
-/**
- * list_add_tail - add a new entry
- * @new: new entry to be added
- * @head: list head to add it before
- *
- * Insert a new entry before the specified head.
- * This is useful for implementing queues.
- */
-static inline void list_add_tail(struct list_head *new, struct list_head *head)
-{
-	__list_add(new, head->prev, head);
-}
-
-
-/*
- * Delete a list entry by making the prev/next entries
- * point to each other.
- *
- * This is only for internal list manipulation where we know
- * the prev/next entries already!
- */
-static inline void __list_del(struct list_head * prev, struct list_head * next)
-{
-	next->prev = prev;
-	prev->next = next;
-}
-
-/**
- * list_del - deletes entry from list.
- * @entry: the element to delete from the list.
- * Note: list_empty on entry does not return true after this, the entry is
- * in an undefined state.
- */
-static inline void list_del(struct list_head *entry)
-{
-	__list_del(entry->prev, entry->next);
-	entry->next = LIST_POISON1;
-	entry->prev = LIST_POISON2;
-}
-
-
-
-/**
- * list_del_init - deletes entry from list and reinitialize it.
- * @entry: the element to delete from the list.
- */
-static inline void list_del_init(struct list_head *entry)
-{
-	__list_del(entry->prev, entry->next);
-	INIT_LIST_HEAD(entry);
-}
-
-/**
- * list_move - delete from one list and add as another's head
- * @list: the entry to move
- * @head: the head that will precede our entry
- */
-static inline void list_move(struct list_head *list, struct list_head *head)
-{
-        __list_del(list->prev, list->next);
-        list_add(list, head);
-}
-
-/**
- * list_move_tail - delete from one list and add as another's tail
- * @list: the entry to move
- * @head: the head that will follow our entry
- */
-static inline void list_move_tail(struct list_head *list,
-				  struct list_head *head)
-{
-        __list_del(list->prev, list->next);
-        list_add_tail(list, head);
-}
-
-/**
- * list_empty - tests whether a list is empty
- * @head: the list to test.
- */
-static inline int list_empty(const struct list_head *head)
-{
-	return head->next == head;
-}
-
-static inline void __list_splice(struct list_head *list,
-				 struct list_head *head)
-{
-	struct list_head *first = list->next;
-	struct list_head *last = list->prev;
-	struct list_head *at = head->next;
-
-	first->prev = head;
-	head->next = first;
-
-	last->next = at;
-	at->prev = last;
-}
-
-/**
- * list_splice - join two lists
- * @list: the new list to add.
- * @head: the place to add it in the first list.
- */
-static inline void list_splice(struct list_head *list, struct list_head *head)
-{
-	if (!list_empty(list))
-		__list_splice(list, head);
-}
-
-static inline void __list_splice_tail(struct list_head *list,
-				      struct list_head *head)
-{
-	struct list_head *first = list->next;
-	struct list_head *last = list->prev;
-	struct list_head *at = head->prev;
-
-	first->prev = at;
-	at->next = first;
-
-	last->next = head;
-	at->prev = last;
-}
-
-/**
- * list_splice_tail - join two lists
- * @list: the new list to add.
- * @head: the place to add it in the first list.
- */
-static inline void list_splice_tail(struct list_head *list, struct list_head *head)
-{
-	if (!list_empty(list))
-		__list_splice_tail(list, head);
-}
-
-
-/**
- * list_splice_init - join two lists and reinitialise the emptied list.
- * @list: the new list to add.
- * @head: the place to add it in the first list.
- *
- * The list at @list is reinitialised
- */
-static inline void list_splice_init(struct list_head *list,
-				    struct list_head *head)
-{
-	if (!list_empty(list)) {
-		__list_splice(list, head);
-		INIT_LIST_HEAD(list);
-	}
-}
-
-/**
- * list_entry - get the struct for this entry
- * @ptr:	the &struct list_head pointer.
- * @type:	the type of the struct this is embedded in.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_entry(ptr, type, member) \
-	container_of(ptr, type, member)
-
-/**
- * list_for_each	-	iterate over a list
- * @pos:	the &struct list_head to use as a loop counter.
- * @head:	the head for your list.
- */
-
-#define list_for_each(pos, head) \
-  for (pos = (head)->next; pos != (head);	\
-       pos = pos->next)
-
-/**
- * __list_for_each	-	iterate over a list
- * @pos:	the &struct list_head to use as a loop counter.
- * @head:	the head for your list.
- *
- * This variant differs from list_for_each() in that it's the
- * simplest possible list iteration code, no prefetching is done.
- * Use this for code that knows the list to be very short (empty
- * or 1 entry) most of the time.
- */
-#define __list_for_each(pos, head) \
-	for (pos = (head)->next; pos != (head); pos = pos->next)
-
-/**
- * list_for_each_prev	-	iterate over a list backwards
- * @pos:	the &struct list_head to use as a loop counter.
- * @head:	the head for your list.
- */
-#define list_for_each_prev(pos, head) \
-	for (pos = (head)->prev; prefetch(pos->prev), pos != (head); \
-        	pos = pos->prev)
-
-/**
- * list_for_each_safe	-	iterate over a list safe against removal of list entry
- * @pos:	the &struct list_head to use as a loop counter.
- * @n:		another &struct list_head to use as temporary storage
- * @head:	the head for your list.
- */
-#define list_for_each_safe(pos, n, head) \
-	for (pos = (head)->next, n = pos->next; pos != (head); \
-		pos = n, n = pos->next)
-
-/**
- * list_for_each_entry	-	iterate over list of given type
- * @pos:	the type * to use as a loop counter.
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry(pos, head, member)				\
-	for (pos = list_entry((head)->next, typeof(*pos), member);	\
-	     &pos->member != (head);					\
-	     pos = list_entry(pos->member.next, typeof(*pos), member))
-
-/**
- * list_for_each_entry_reverse - iterate backwards over list of given type.
- * @pos:	the type * to use as a loop counter.
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry_reverse(pos, head, member)			\
-	for (pos = list_entry((head)->prev, typeof(*pos), member);	\
-	     &pos->member != (head); 	\
-	     pos = list_entry(pos->member.prev, typeof(*pos), member))
-
-/**
- * list_prepare_entry - prepare a pos entry for use as a start point in
- *			list_for_each_entry_continue
- * @pos:	the type * to use as a start point
- * @head:	the head of the list
- * @member:	the name of the list_struct within the struct.
- */
-#define list_prepare_entry(pos, head, member) \
-	((pos) ? : list_entry(head, typeof(*pos), member))
-
-/**
- * list_for_each_entry_continue -	iterate over list of given type
- *			continuing after existing point
- * @pos:	the type * to use as a loop counter.
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry_continue(pos, head, member) 		\
-	for (pos = list_entry(pos->member.next, typeof(*pos), member);	\
-	     &pos->member != (head);	\
-	     pos = list_entry(pos->member.next, typeof(*pos), member))
-
-/**
- * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
- * @pos:	the type * to use as a loop counter.
- * @n:		another type * to use as temporary storage
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry_safe(pos, n, head, member)			\
-	for (pos = list_entry((head)->next, typeof(*pos), member),	\
-		n = list_entry(pos->member.next, typeof(*pos), member);	\
-	     &pos->member != (head); 					\
-	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
-
-/**
- * list_for_each_entry_safe_continue -	iterate over list of given type
- *			continuing after existing point safe against removal of list entry
- * @pos:	the type * to use as a loop counter.
- * @n:		another type * to use as temporary storage
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry_safe_continue(pos, n, head, member) 		\
-	for (pos = list_entry(pos->member.next, typeof(*pos), member), 		\
-		n = list_entry(pos->member.next, typeof(*pos), member);		\
-	     &pos->member != (head);						\
-	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
-
-/**
- * list_for_each_entry_safe_reverse - iterate backwards over list of given type safe against
- *				      removal of list entry
- * @pos:	the type * to use as a loop counter.
- * @n:		another type * to use as temporary storage
- * @head:	the head for your list.
- * @member:	the name of the list_struct within the struct.
- */
-#define list_for_each_entry_safe_reverse(pos, n, head, member)		\
-	for (pos = list_entry((head)->prev, typeof(*pos), member),	\
-		n = list_entry(pos->member.prev, typeof(*pos), member);	\
-	     &pos->member != (head); 					\
-	     pos = n, n = list_entry(n->member.prev, typeof(*n), member))
-
-
-
-
-/*
- * Double linked lists with a single pointer list head.
- * Mostly useful for hash tables where the two pointer list head is
- * too wasteful.
- * You lose the ability to access the tail in O(1).
- */
-
-struct hlist_head {
-	struct hlist_node *first;
-};
-
-struct hlist_node {
-	struct hlist_node *next, **pprev;
-};
-
-#define HLIST_HEAD_INIT { .first = NULL }
-#define HLIST_HEAD(name) struct hlist_head name = {  .first = NULL }
-#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)
-#define INIT_HLIST_NODE(ptr) ((ptr)->next = NULL, (ptr)->pprev = NULL)
-
-static inline int hlist_unhashed(const struct hlist_node *h)
-{
-	return !h->pprev;
-}
-
-static inline int hlist_empty(const struct hlist_head *h)
-{
-	return !h->first;
-}
-
-static inline void __hlist_del(struct hlist_node *n)
-{
-	struct hlist_node *next = n->next;
-	struct hlist_node **pprev = n->pprev;
-	*pprev = next;
-	if (next)
-		next->pprev = pprev;
-}
-
-static inline void hlist_del(struct hlist_node *n)
-{
-	__hlist_del(n);
-	n->next = LIST_POISON1;
-	n->pprev = LIST_POISON2;
-}
-
-
-static inline void hlist_del_init(struct hlist_node *n)
-{
-	if (n->pprev)  {
-		__hlist_del(n);
-		INIT_HLIST_NODE(n);
-	}
-}
-
-static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h)
-{
-	struct hlist_node *first = h->first;
-	n->next = first;
-	if (first)
-		first->pprev = &n->next;
-	h->first = n;
-	n->pprev = &h->first;
-}
-
-
-
-/* next must be != NULL */
-static inline void hlist_add_before(struct hlist_node *n,
-					struct hlist_node *next)
-{
-	n->pprev = next->pprev;
-	n->next = next;
-	next->pprev = &n->next;
-	*(n->pprev) = n;
-}
-
-static inline void hlist_add_after(struct hlist_node *n,
-					struct hlist_node *next)
-{
-	next->next = n->next;
-	n->next = next;
-	next->pprev = &n->next;
-
-	if(next->next)
-		next->next->pprev  = &next->next;
-}
-
-
-
-#define hlist_entry(ptr, type, member) container_of(ptr,type,member)
-
-#define hlist_for_each(pos, head) \
-	for (pos = (head)->first; pos && ({ prefetch(pos->next); 1; }); \
-	     pos = pos->next)
-
-#define hlist_for_each_safe(pos, n, head) \
-	for (pos = (head)->first; pos && ({ n = pos->next; 1; }); \
-	     pos = n)
-
-/**
- * hlist_for_each_entry	- iterate over list of given type
- * @tpos:	the type * to use as a loop counter.
- * @pos:	the &struct hlist_node to use as a loop counter.
- * @head:	the head for your list.
- * @member:	the name of the hlist_node within the struct.
- */
-#define hlist_for_each_entry(tpos, pos, head, member)			 \
-	for (pos = (head)->first;					 \
-	     pos && ({ prefetch(pos->next); 1;}) &&			 \
-		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
-	     pos = pos->next)
-
-/**
- * hlist_for_each_entry_continue - iterate over a hlist continuing after existing point
- * @tpos:	the type * to use as a loop counter.
- * @pos:	the &struct hlist_node to use as a loop counter.
- * @member:	the name of the hlist_node within the struct.
- */
-#define hlist_for_each_entry_continue(tpos, pos, member)		 \
-	for (pos = (pos)->next;						 \
-	     pos && ({ prefetch(pos->next); 1;}) &&			 \
-		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
-	     pos = pos->next)
-
-/**
- * hlist_for_each_entry_from - iterate over a hlist continuing from existing point
- * @tpos:	the type * to use as a loop counter.
- * @pos:	the &struct hlist_node to use as a loop counter.
- * @member:	the name of the hlist_node within the struct.
- */
-#define hlist_for_each_entry_from(tpos, pos, member)			 \
-	for (; pos && ({ prefetch(pos->next); 1;}) &&			 \
-		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
-	     pos = pos->next)
-
-/**
- * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
- * @tpos:	the type * to use as a loop counter.
- * @pos:	the &struct hlist_node to use as a loop counter.
- * @n:		another &struct hlist_node to use as temporary storage
- * @head:	the head for your list.
- * @member:	the name of the hlist_node within the struct.
- */
-#define hlist_for_each_entry_safe(tpos, pos, n, head, member) 		 \
-	for (pos = (head)->first;					 \
-	     pos && ({ n = pos->next; 1; }) && 				 \
-		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
-	     pos = n)
-
-
-/**
- * list_count - return length of list
- * @head        the head for your list.
- */
-static inline int list_count(struct list_head *head)
-{
-	int n = 0;
-	struct list_head *p;
-
-	list_for_each(p, head) n++;
-	return n;
-}
-
-
-/**
- * list_free_f - free items in a list with a function
- * @head	the heaf for your list.
- * @f           function that releases an item in the list.
- */
-static inline void list_free_f(struct list_head *head, void (*f)(struct list_head *))
-{
-	struct list_head *p, *n;
-
-        list_for_each_safe(p, n, head) {
-                list_del(p);
-                f(p);
-        }
-}
-
-#endif
-

src/main.c

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
@@ -8,26 +9,27 @@
 #include <sys/time.h>
 #include <sys/ioctl.h>
 #include <poll.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
 #include <pthread.h>
 
 #include <mscp.h>
-#include <util.h>
+#include <minmax.h>
+#include <strerrno.h>
+#include <print.h>
 
+#include <config.h>
 
-#ifndef _VERSION /* passed through cmake */
-#define VERSION "(unknown)"
-#else
-#define VERSION _VERSION
-#endif
-
-
-void usage(bool print_help) {
-	printf("mscp v" VERSION ": copy files over multiple ssh connections\n"
+void usage(bool print_help)
+{
+	printf("mscp " MSCP_BUILD_VERSION ": copy files over multiple SSH connections\n"
 	       "\n"
-	       "Usage: mscp [vqDHdNh] [-n nr_conns] [-m coremask] [-u max_startups]\n"
+	       "Usage: mscp [-46vqDpHdNh] [-n nr_conns] [-m coremask]\n"
+	       "            [-u max_startups] [-I interval] [-W checkpoint] [-R checkpoint]\n"
 	       "            [-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]\n"
-	       "            [-l login_name] [-p port] [-i identity_file]\n"
-	       "            [-c cipher_spec] [-M hmac_spec] [-C compress] source ... target\n"
+	       "            [-l login_name] [-P port] [-F ssh_config] [-i identity_file]\n"
+	       "            [-c cipher_spec] [-M hmac_spec] [-C compress] [-g congestion]\n"
+	       "            source ... target\n"
 	       "\n");
 
 	if (!print_help)
@@ -36,26 +38,34 @@ void usage(bool print_help) {
 	printf("    -n NR_CONNECTIONS  number of connections "
 	       "(default: floor(log(cores)*2)+1)\n"
 	       "    -m COREMASK        hex value to specify cores where threads pinned\n"
-	       "    -u MAX_STARTUPS    number of concurrent outgoing connections "
+	       "    -u MAX_STARTUPS    number of concurrent SSH connection attempts "
 	       "(default: 8)\n"
+	       "    -I INTERVAL        interval between SSH connection attempts (default: 0)\n"
+	       "    -W CHECKPOINT      write states to the checkpoint if transfer fails\n"
+	       "    -R CHECKPOINT      resume transferring from the checkpoint\n"
+	       "\n"
 	       "    -s MIN_CHUNK_SIZE  min chunk size (default: 64MB)\n"
 	       "    -S MAX_CHUNK_SIZE  max chunk size (default: filesize/nr_conn)\n"
-	       "\n"
 	       "    -a NR_AHEAD        number of inflight SFTP commands (default: 32)\n"
 	       "    -b BUF_SZ          buffer size for i/o and transfer\n"
 	       "\n"
+	       "    -4                 use IPv4\n"
+	       "    -6                 use IPv6\n"
 	       "    -v                 increment verbose output level\n"
 	       "    -q                 disable output\n"
 	       "    -D                 dry run. check copy destinations with -vvv\n"
 	       "    -r                 no effect\n"
 	       "\n"
 	       "    -l LOGIN_NAME      login name\n"
-	       "    -p PORT            port number\n"
+	       "    -P PORT            port number\n"
+	       "    -F CONFIG          path to user ssh config (default ~/.ssh/config)\n"
 	       "    -i IDENTITY        identity file for public key authentication\n"
 	       "    -c CIPHER          cipher spec\n"
 	       "    -M HMAC            hmac spec\n"
 	       "    -C COMPRESS        enable compression: "
 	       "yes, no, zlib, zlib@openssh.com\n"
+	       "    -g CONGESTION      specify TCP congestion control algorithm\n"
+	       "    -p                 preserve timestamps of files\n"
 	       "    -H                 disable hostkey check\n"
 	       "    -d                 increment ssh debug output level\n"
 	       "    -N                 enable Nagle's algorithm (default disabled)\n"
@@ -63,107 +73,160 @@ void usage(bool print_help) {
 	       "\n");
 }
 
-char *split_remote_and_path(const char *string, char **remote, char **path)
+char *strip_brackets(char *s)
 {
-	char *s, *p;
-
-	/* split user@host:path into user@host, and path.
-	 * return value is strdup()ed memory (for free()).
-	 */
-
-	if (!(s = strdup(string))) {
-		fprintf(stderr, "strdup: %s\n", strerror(errno));
-		return NULL;
+	if (s[0] == '[' && s[strlen(s) - 1] == ']') {
+		s[strlen(s) - 1] = '\0';
+		return s + 1;
 	}
-
-	if ((p = strchr(s, ':'))) {
-		if (p == s || ((p > s) && *(p - 1) == '\\')) {
-			/* first byte is colon, or escaped colon. no user@host here  */
-			goto no_remote;
-		} else {
-			/* we found ':', so this is remote:path notation. split it */
-			*p = '\0';
-			*remote = s;
-			*path = p + 1;
-			return s;
-		}
-	}
-
-no_remote:
-	*remote = NULL;
-	*path = s;
 	return s;
 }
 
+char *split_user_host_path(const char *s, char **userp, char **hostp, char **pathp)
+{
+	char *tmp, *cp, *user = NULL, *host = NULL, *path = NULL;
+	bool inbrackets = false;
+
+	if (!(tmp = strdup(s))) {
+		pr_err("stdrup: %s", strerror(errno));
+		return NULL;
+	}
+
+	user = NULL;
+	host = NULL;
+	path = tmp;
+	for (cp = tmp; *cp; cp++) {
+		if (*cp == '@' && (cp > tmp) && *(cp - 1) != '\\' && user == NULL) {
+			/* cp is non-escaped '@', so this '@' is the
+			 * delimitater between username and host. */
+			*cp = '\0';
+			user = tmp;
+			host = cp + 1;
+		}
+		if (*cp == '[')
+			inbrackets = true;
+		if (*cp == ']')
+			inbrackets = false;
+		if (*cp == ':' && (cp > tmp) && *(cp - 1) != '\\') {
+			if (!inbrackets) {
+				/* cp is non-escaped ':' and not in
+				 * brackets for IPv6 address
+				 * notation. So, this ':' is the
+				 * delimitater between host and
+				 * path. */
+				*cp = '\0';
+				host = host == NULL ? tmp : host;
+				path = cp + 1;
+				break;
+			}
+		}
+	}
+	*userp = user;
+	*hostp = host ? strip_brackets(host) : NULL;
+	*pathp = path;
+	return tmp;
+}
+
 struct target {
-	char *remote;
+	char *copy;
+	char *user;
+	char *host;
 	char *path;
 };
 
+int compare_remote(struct target *a, struct target *b)
+{
+	/* return 0 if a and b have the identical user@host, otherwise 1 */
+	int alen, blen;
+
+	if (a->user) {
+		if (!b->user)
+			return 1;
+		alen = strlen(a->user);
+		blen = strlen(b->user);
+		if (alen != blen)
+			return 1;
+		if (strncmp(a->user, b->user, alen) != 0)
+			return 1;
+	} else if (b->user)
+		return 1;
+
+	if (a->host) {
+		if (!b->host)
+			return 1;
+		alen = strlen(a->host);
+		blen = strlen(b->host);
+		if (alen != blen)
+			return 1;
+		if (strncmp(a->host, b->host, alen) != 0)
+			return 1;
+	} else if (b->host)
+		return 1;
+
+	return 0;
+}
+
 struct target *validate_targets(char **arg, int len)
 {
 	/* arg is array of source ... destination.
 	 * There are two cases:
 	 *
-	 * 1. remote:path remote:path ... path, remote to local copy
-	 * 2. path path ... remote:path, local to remote copy.
+	 * 1. user@host:path host:path ... path, remote to local copy
+	 * 2. path path ... host:path, local to remote copy.
 	 *
-	 * This function split (remote:)path args into struct target,
+	 * This function split user@remote:path args into struct target,
 	 * and validate all remotes are identical (mscp does not support
 	 * remote to remote copy).
 	 */
 
-	struct target *t;
-	char *r;
+	struct target *t, *t0;
 	int n;
 
 	if ((t = calloc(len, sizeof(struct target))) == NULL) {
-		fprintf(stderr, "calloc: %s\n", strerror(errno));
+		pr_err("calloc: %s", strerrno());
 		return NULL;
 	}
 	memset(t, 0, len * sizeof(struct target));
 
 	/* split remote:path into remote and path */
 	for (n = 0; n < len; n++) {
-		if (split_remote_and_path(arg[n], &t[n].remote, &t[n].path) == NULL)
+		t[n].copy =
+			split_user_host_path(arg[n], &t[n].user, &t[n].host, &t[n].path);
+		if (!t[n].copy) {
+			pr_err("failed to parse '%s'", arg[n]);
 			goto free_target_out;
+		}
 	}
 
-	/* check all remote are identical. t[len - 1] is destination,
+	/* check all user@host are identical. t[len - 1] is destination,
 	 * so we need to check t[0] to t[len - 2] having the identical
-	 * remote */
-	r = t[0].remote;
+	 * remote notation */
+	t0 = &t[0];
 	for (n = 1; n < len - 1; n++) {
-		if (!r && t[n].remote) {
+		if (compare_remote(t0, &t[n]) != 0)
 			goto invalid_remotes;
-		}
-		if (r) {
-			if (!t[n].remote ||
-			    strlen(r) != strlen(t[n].remote) ||
-			    strcmp(r, t[n].remote) != 0)
-				goto invalid_remotes;
-		}
 	}
 
 	/* check inconsistent remote position in args */
-	if (t[0].remote == NULL && t[len - 1].remote == NULL) {
-		fprintf(stderr, "no remote host given\n");
+	if (t[0].host == NULL && t[len - 1].host == NULL) {
+		pr_err("no remote host given");
 		goto free_split_out;
 	}
 
-	if (t[0].remote != NULL && t[len - 1].remote != NULL) {
-		fprintf(stderr, "no local path given\n");
+	if (t[0].host != NULL && t[len - 1].host != NULL) {
+		pr_err("no local path given");
 		goto free_split_out;
 	}
 
 	return t;
 
 invalid_remotes:
-	fprintf(stderr, "specified remote host invalid\n");
+	pr_err("invalid remote host notation");
 
 free_split_out:
 	for (n = 0; n < len; n++)
-		t[n].remote ? free(t[n].remote) : free(t[n].path);
+		if (t[n].copy)
+			free(t[n].copy);
 
 free_target_out:
 	free(t);
@@ -171,13 +234,12 @@ free_target_out:
 }
 
 struct mscp *m = NULL;
-int msg_fd = 0;
 pthread_t tid_stat = 0;
+bool interrupted = false;
 
 void sigint_handler(int sig)
 {
-	if (tid_stat)
-		pthread_cancel(tid_stat);
+	interrupted = true;
 	mscp_stop(m);
 }
 
@@ -185,13 +247,15 @@ void *print_stat_thread(void *arg);
 
 void print_cli(const char *fmt, ...)
 {
-        va_list va;
+	va_list va;
 	va_start(va, fmt);
 	vfprintf(stdout, fmt, va);
 	fflush(stdout);
 	va_end(va);
 }
 
+void print_stat(bool final);
+
 int main(int argc, char **argv)
 {
 	struct mscp_ssh_opts s;
@@ -200,29 +264,39 @@ int main(int argc, char **argv)
 	int pipe_fd[2];
 	int ch, n, i, ret;
 	int direction = 0;
-	char *remote;
-	bool dryrun = false;
+	char *remote = NULL, *checkpoint_save = NULL, *checkpoint_load = NULL;
+	bool dryrun = false, resume = false;
 
 	memset(&s, 0, sizeof(s));
 	memset(&o, 0, sizeof(o));
 	o.severity = MSCP_SEVERITY_WARN;
 
-	while ((ch = getopt(argc, argv, "n:m:u:s:S:a:b:vqDrl:p:i:c:M:C:HdNh")) != -1) {
+#define mscpopts "n:m:u:I:W:R:s:S:a:b:46vqDrl:P:i:F:c:M:C:g:pHdNh"
+	while ((ch = getopt(argc, argv, mscpopts)) != -1) {
 		switch (ch) {
 		case 'n':
 			o.nr_threads = atoi(optarg);
 			if (o.nr_threads < 1) {
-				fprintf(stderr, "invalid number of connections: %s\n",
-					optarg);
+				pr_err("invalid number of connections: %s", optarg);
 				return 1;
 			}
 			break;
 		case 'm':
-			strncpy(o.coremask, optarg, sizeof(o.coremask));
+			o.coremask = optarg;
 			break;
 		case 'u':
 			o.max_startups = atoi(optarg);
 			break;
+		case 'I':
+			o.interval = atoi(optarg);
+			break;
+		case 'W':
+			checkpoint_save = optarg;
+			break;
+		case 'R':
+			checkpoint_load = optarg;
+			resume = true;
+			break;
 		case 's':
 			o.min_chunk_sz = atoi(optarg);
 			break;
@@ -235,6 +309,12 @@ int main(int argc, char **argv)
 		case 'b':
 			o.buf_sz = atoi(optarg);
 			break;
+		case '4':
+			s.ai_family = AF_INET;
+			break;
+		case '6':
+			s.ai_family = AF_INET6;
+			break;
 		case 'v':
 			o.severity++;
 			break;
@@ -248,46 +328,31 @@ int main(int argc, char **argv)
 			/* for compatibility with scp */
 			break;
 		case 'l':
-			if (strlen(optarg) > MSCP_SSH_MAX_LOGIN_NAME - 1) {
-				fprintf(stderr, "long login name: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.login_name, optarg, MSCP_SSH_MAX_LOGIN_NAME - 1);
+			s.login_name = optarg;
 			break;
-		case 'p':
-			if (strlen(optarg) > MSCP_SSH_MAX_PORT_STR - 1) {
-				fprintf(stderr, "long port string: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.port, optarg, MSCP_SSH_MAX_PORT_STR);
+		case 'P':
+			s.port = optarg;
+			break;
+		case 'F':
+			s.config = optarg;
 			break;
 		case 'i':
-			if (strlen(optarg) > MSCP_SSH_MAX_IDENTITY_PATH - 1) {
-				fprintf(stderr, "long identity path: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.identity, optarg, MSCP_SSH_MAX_IDENTITY_PATH);
+			s.identity = optarg;
 			break;
 		case 'c':
-			if (strlen(optarg) > MSCP_SSH_MAX_CIPHER_STR - 1) {
-				fprintf(stderr, "long cipher string: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.cipher, optarg, MSCP_SSH_MAX_CIPHER_STR);
+			s.cipher = optarg;
 			break;
 		case 'M':
-			if (strlen(optarg) > MSCP_SSH_MAX_HMAC_STR - 1) {
-				fprintf(stderr, "long hmac string: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.hmac, optarg, MSCP_SSH_MAX_HMAC_STR);
+			s.hmac = optarg;
 			break;
 		case 'C':
-			if (strlen(optarg) > MSCP_SSH_MAX_COMP_STR - 1) {
-				fprintf(stderr, "long compress string: %s\n", optarg);
-				return -1;
-			}
-			strncpy(s.compress, optarg, MSCP_SSH_MAX_COMP_STR);
+			s.compress = optarg;
+			break;
+		case 'g':
+			s.ccalgo = optarg;
+			break;
+		case 'p':
+			o.preserve_ts = true;
 			break;
 		case 'H':
 			s.no_hostkey_check = true;
@@ -307,60 +372,84 @@ int main(int argc, char **argv)
 		}
 	}
 
-	if (argc - optind < 2) {
-		/* mscp needs at lease 2 (src and target) argument */
-		usage(false);
-		return 1;
-	}
-	i = argc - optind;
+	s.password = getenv(ENV_SSH_AUTH_PASSWORD);
+	s.passphrase = getenv(ENV_SSH_AUTH_PASSPHRASE);
 
-	if ((t = validate_targets(argv + optind, i)) == NULL)
+	if ((m = mscp_init(&o, &s)) == NULL) {
+		pr_err("mscp_init: %s", priv_get_err());
 		return -1;
+	}
 
-	if (t[0].remote) {
-		/* copy remote to local */
-		direction = MSCP_DIRECTION_R2L;
-		remote = t[0].remote;
+	if (!resume) {
+		/* normal transfer (not resume) */
+		if (argc - optind < 2) {
+			/* mscp needs at lease 2 (src and target) argument */
+			usage(false);
+			return 1;
+		}
+		i = argc - optind;
+
+		if ((t = validate_targets(argv + optind, i)) == NULL)
+			return -1;
+
+		if (t[0].host) {
+			/* copy remote to local */
+			direction = MSCP_DIRECTION_R2L;
+			remote = t[0].host;
+			s.login_name = s.login_name ? s.login_name : t[0].user;
+		} else {
+			/* copy local to remote */
+			direction = MSCP_DIRECTION_L2R;
+			remote = t[i - 1].host;
+			s.login_name = s.login_name ? s.login_name : t[i - 1].user;
+		}
+
+		if (mscp_set_remote(m, remote, direction) < 0) {
+			pr_err("mscp_set_remote: %s", priv_get_err());
+			return -1;
+		}
+
+		if (mscp_connect(m) < 0) {
+			pr_err("mscp_connect: %s", priv_get_err());
+			return -1;
+		}
+
+		for (n = 0; n < i - 1; n++) {
+			if (mscp_add_src_path(m, t[n].path) < 0) {
+				pr_err("mscp_add_src_path: %s", priv_get_err());
+				return -1;
+			}
+		}
+
+		if (mscp_set_dst_path(m, t[i - 1].path) < 0) {
+			pr_err("mscp_set_dst_path: %s", priv_get_err());
+			return -1;
+		}
+
+		/* start to scan source files and resolve their destination paths */
+		if (mscp_scan(m) < 0) {
+			pr_err("mscp_scan: %s", priv_get_err());
+			return -1;
+		}
 	} else {
-		/* copy local to remote */
-		direction = MSCP_DIRECTION_L2R;
-		remote = t[i - 1].remote;
-	}
-
-	if (!dryrun) {
-		if (pipe(pipe_fd) < 0) {
-			fprintf(stderr, "pipe: %s\n", strerror(errno));
+		/* resume a transfer from the specified checkpoint */
+		char r[512];
+		int d;
+		if (mscp_checkpoint_get_remote(checkpoint_load, r, sizeof(r), &d) < 0) {
+			pr_err("mscp_checkpoint_get_remote: %s", priv_get_err());
 			return -1;
 		}
-		msg_fd = pipe_fd[0];
-		o.msg_fd = pipe_fd[1];
-	}
 
-	if ((m = mscp_init(remote, direction, &o, &s)) == NULL) {
-		fprintf(stderr, "mscp_init: %s\n", mscp_get_error());
-		return -1;
-	}
-
-	if (mscp_connect(m) < 0) {
-		fprintf(stderr, "mscp_connect: %s\n", mscp_get_error());
-		return -1;
-	}
-
-	for (n = 0; n < i - 1; n++) {
-		if (mscp_add_src_path(m, t[n].path) < 0) {
-			fprintf(stderr, "mscp_add_src_path: %s\n", mscp_get_error());
+		if (mscp_set_remote(m, r, d) < 0) {
+			pr_err("mscp_set_remote: %s", priv_get_err());
 			return -1;
 		}
-        }
 
-	if (mscp_set_dst_path(m, t[i - 1].path) < 0) {
-		fprintf(stderr, "mscp_set_dst_path: %s\n", mscp_get_error());
-		return -1;
-	}
-
-	if (mscp_scan(m) < 0) {
-		fprintf(stderr, "mscp_scan: %s\n", mscp_get_error());
-		return -1;
+		/* load paths and chunks to be transferred from checkpoint */
+		if (mscp_checkpoint_load(m, checkpoint_load) < 0) {
+			pr_err("mscp_checkpoint_load: %s", priv_get_err());
+			return -1;
+		}
 	}
 
 	if (dryrun) {
@@ -369,221 +458,225 @@ int main(int argc, char **argv)
 	}
 
 	if (pthread_create(&tid_stat, NULL, print_stat_thread, NULL) < 0) {
-		fprintf(stderr, "pthread_create: %s\n", strerror(errno));
+		pr_err("pthread_create: %s", strerror(errno));
 		return -1;
 	}
 
 	if (signal(SIGINT, sigint_handler) == SIG_ERR) {
-		fprintf(stderr, "signal: %s\n", strerror(errno));
+		pr_err("signal: %s", strerror(errno));
 		return -1;
 	}
 
 	ret = mscp_start(m);
 	if (ret < 0)
-		fprintf(stderr, "mscp_start: %s\n", mscp_get_error());
+		pr_err("mscp_start: %s", priv_get_err());
 
 	ret = mscp_join(m);
-	if (ret != 0)
-		fprintf(stderr, "mscp_join: %s\n", mscp_get_error());
 
 	pthread_cancel(tid_stat);
 	pthread_join(tid_stat, NULL);
 
+	print_stat(true);
+	print_cli("\n"); /* final output */
 out:
+	if (interrupted)
+		ret = 1;
+
+	if ((dryrun || ret != 0) && checkpoint_save) {
+		print_cli("save checkpoint to %s\n", checkpoint_save);
+		if (mscp_checkpoint_save(m, checkpoint_save) < 0) {
+			pr_err("mscp_checkpoint_save: %s", priv_get_err());
+			return -1;
+		}
+	}
+
 	mscp_cleanup(m);
 	mscp_free(m);
 
 	return ret;
 }
 
-
 /* progress bar-related functions */
 
 double calculate_timedelta(struct timeval *b, struct timeval *a)
 {
-        double sec, usec;
+	double sec, usec;
 
-        if (a->tv_usec < b->tv_usec) {
-                a->tv_usec += 1000000;
-                a->tv_sec--;
-        }
+	if (a->tv_usec < b->tv_usec) {
+		a->tv_usec += 1000000;
+		a->tv_sec--;
+	}
 
-        sec = a->tv_sec - b->tv_sec;
-        usec = a->tv_usec - b->tv_usec;
-        sec += usec / 1000000;
+	sec = a->tv_sec - b->tv_sec;
+	usec = a->tv_usec - b->tv_usec;
+	sec += usec / 1000000;
 
-        return sec;
+	return sec;
 }
 
-
 double calculate_bps(size_t diff, struct timeval *b, struct timeval *a)
 {
-        return (double)diff / calculate_timedelta(b, a);
+	return (double)diff / calculate_timedelta(b, a);
 }
 
 char *calculate_eta(size_t remain, size_t diff, struct timeval *b, struct timeval *a,
 		    bool final)
 {
-        static char buf[16];
-        double elapsed = calculate_timedelta(b, a);
-        double eta;
+	static char buf[16];
 
-        if (diff == 0)
-                snprintf(buf, sizeof(buf), "--:-- ETA");
-	else if (final) {
-		snprintf(buf, sizeof(buf), "%02d:%02d    ",
-			 (int)(floor(elapsed / 60)), (int)round(elapsed) % 60);
-	} else {
-                eta = remain / (diff / elapsed);
-                snprintf(buf, sizeof(buf), "%02d:%02d ETA",
-                         (int)floor(eta / 60), (int)round(eta) % 60);
-        }
-        return buf;
+#define bps_window_size 16
+	static double bps_window[bps_window_size];
+	static size_t sum, idx, count;
+	double elapsed = calculate_timedelta(b, a);
+	double bps = diff / elapsed;
+	double avg, eta;
+
+	/* early return when diff == 0 (stalled) or final output */
+	if (diff == 0) {
+		snprintf(buf, sizeof(buf), "--:-- ETA");
+		return buf;
+	}
+	if (final) {
+		snprintf(buf, sizeof(buf), "%02d:%02d    ", (int)(floor(elapsed / 60)),
+			 (int)round(elapsed) % 60);
+		return buf;
+	}
+
+	/* drop the old bps value and add the recent one */
+	sum -= bps_window[idx];
+	bps_window[idx] = bps;
+	sum += bps_window[idx];
+	idx = (idx + 1) % bps_window_size;
+	count++;
+
+	/* calcuate ETA from avg of recent bps values */
+	avg = sum / min(count, bps_window_size);
+	eta = remain / avg;
+	snprintf(buf, sizeof(buf), "%02d:%02d ETA", (int)floor(eta / 60),
+		 (int)round(eta) % 60);
+
+	return buf;
 }
 
 void print_progress_bar(double percent, char *suffix)
 {
-        int n, thresh, bar_width;
-        struct winsize ws;
-        char buf[128];
+	int n, thresh, bar_width;
+	struct winsize ws;
+	char buf[128];
 
-        /*
+	/*
          * [=======>   ] XX% SUFFIX
          */
 
-        buf[0] = '\0';
+	buf[0] = '\0';
 
-        if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0)
-                return; /* XXX */
-        bar_width = min(sizeof(buf), ws.ws_col) - strlen(suffix) - 7;
+	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0)
+		return; /* XXX */
+	bar_width = min(sizeof(buf), ws.ws_col) - strlen(suffix) - 7;
 
-        memset(buf, 0, sizeof(buf));
-        if (bar_width > 8) {
-                thresh = floor(bar_width * (percent / 100)) - 1;
+	memset(buf, 0, sizeof(buf));
+	if (bar_width > 8) {
+		thresh = floor(bar_width * (percent / 100)) - 1;
 
-                for (n = 1; n < bar_width - 1; n++) {
-                        if (n <= thresh)
-                                buf[n] = '=';
-                        else
-                                buf[n] = ' ';
-                }
-                buf[thresh] = '>';
-                buf[0] = '[';
-                buf[bar_width - 1] = ']';
-                snprintf(buf + bar_width, sizeof(buf) - bar_width,
-                         " %3d%% ", (int)floor(percent));
-        }
+		for (n = 1; n < bar_width - 1; n++) {
+			if (n <= thresh)
+				buf[n] = '=';
+			else
+				buf[n] = ' ';
+		}
+		buf[thresh] = '>';
+		buf[0] = '[';
+		buf[bar_width - 1] = ']';
+		snprintf(buf + bar_width, sizeof(buf) - bar_width, " %3d%% ",
+			 (int)floor(percent));
+	}
 
-	print_cli("\r\033[K" "%s%s", buf, suffix);
+	print_cli("\r\033[K"
+		  "%s%s",
+		  buf, suffix);
 }
 
-void print_progress(struct timeval *b, struct timeval *a,
-		    size_t total, size_t last, size_t done, bool final)
+void print_progress(struct timeval *b, struct timeval *a, size_t total, size_t last,
+		    size_t done, bool final)
 {
-        char *bps_units[] = { "B/s ", "KB/s", "MB/s", "GB/s" };
-        char *byte_units[] = { "B ", "KB", "MB", "GB", "TB", "PB" };
-        char suffix[128];
-        int bps_u, byte_tu, byte_du;
-        size_t total_round, done_round;
-        int percent;
-        double bps;
+	char *bps_units[] = { "B/s ", "KB/s", "MB/s", "GB/s" };
+	char *byte_units[] = { "B ", "KB", "MB", "GB", "TB", "PB" };
+	char suffix[128];
+	int bps_u, byte_tu, byte_du;
+	double total_round, done_round;
+	int percent;
+	double bps;
 
 #define array_size(a) (sizeof(a) / sizeof(a[0]))
 
-        if (total <= 0) {
-		print_cli("\r\033[K" "total 0 byte transferred");
-                return; /* copy 0-byte file(s) */
-        }
+	if (total <= 0) {
+		print_cli("\r\033[K"
+			  "total 0 byte transferred");
+		return; /* copy 0-byte file(s) */
+	}
 
-        total_round = total;
-        for (byte_tu = 0; total_round > 1000 && byte_tu < array_size(byte_units) - 1;
-             byte_tu++)
-                total_round /= 1024;
+	total_round = total;
+	for (byte_tu = 0; total_round > 1000 && byte_tu < array_size(byte_units) - 1;
+	     byte_tu++)
+		total_round /= 1024;
 
-        bps = calculate_bps(done - last, b, a);
-        for (bps_u = 0; bps > 1000 && bps_u < array_size(bps_units); bps_u++)
-                bps /= 1000;
+	bps = calculate_bps(done - last, b, a);
+	for (bps_u = 0; bps > 1000 && bps_u < array_size(bps_units); bps_u++)
+		bps /= 1000;
 
-        percent = floor(((double)(done) / (double)total) * 100);
+	percent = floor(((double)(done) / (double)total) * 100);
 
-        done_round = done;
-        for (byte_du = 0; done_round > 1000 && byte_du < array_size(byte_units) - 1;
-             byte_du++)
-                done_round /= 1024;
+	done_round = done;
+	for (byte_du = 0; done_round > 1024 && byte_du < array_size(byte_units) - 1;
+	     byte_du++)
+		done_round /= 1024;
 
-        snprintf(suffix, sizeof(suffix), "%4lu%s/%lu%s %6.1f%s  %s",
-                 done_round, byte_units[byte_du], total_round, byte_units[byte_tu],
-                 bps, bps_units[bps_u],
-		 calculate_eta(total - done, done - last, b, a, final));
+	snprintf(suffix, sizeof(suffix), "%4.1lf%s/%.1lf%s %6.1f%s  %s", done_round,
+		 byte_units[byte_du], total_round, byte_units[byte_tu], bps,
+		 bps_units[bps_u], calculate_eta(total - done, done - last, b, a, final));
 
-        print_progress_bar(percent, suffix);
+	print_progress_bar(percent, suffix);
 }
 
-
 struct xfer_stat {
-        struct timeval start, before, after;
-        size_t total;
-        size_t last;
-        size_t done;
+	struct timeval start, before, after;
+	size_t total;
+	size_t last;
+	size_t done;
 };
 struct xfer_stat x;
 
-void print_stat_thread_cleanup(void *arg)
+void print_stat(bool final)
 {
 	struct mscp_stats s;
+	char buf[8192];
+	int timeout;
 
 	gettimeofday(&x.after, NULL);
-	mscp_get_stats(m, &s);
-	x.total = s.total;
-	x.done = s.done;
-
-	/* print progress from the beginning */
-	print_progress(&x.start, &x.after, x.total, 0, x.done, true);
-	print_cli("\n"); /* final output */
+	if (calculate_timedelta(&x.before, &x.after) > 1 || final) {
+		mscp_get_stats(m, &s);
+		x.total = s.total;
+		x.done = s.done;
+		print_progress(!final ? &x.before : &x.start, &x.after, x.total,
+			       !final ? x.last : 0, x.done, final);
+		x.before = x.after;
+		x.last = x.done;
+	}
 }
 
 void *print_stat_thread(void *arg)
 {
-	struct pollfd pfd = { .fd = msg_fd, .events = POLLIN };
 	struct mscp_stats s;
 	char buf[8192];
 
 	memset(&x, 0, sizeof(x));
-        gettimeofday(&x.start, NULL);
-        x.before = x.start;
-
-        pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
-        pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
-        pthread_cleanup_push(print_stat_thread_cleanup, NULL);
+	gettimeofday(&x.start, NULL);
+	x.before = x.start;
 
 	while (true) {
-		if (poll(&pfd, 1, 100) < 0) {
-			fprintf(stderr, "poll: %s\n", strerror(errno));
-			return NULL;
-		}
-
-		if (pfd.revents & POLLIN) {
-			memset(buf, 0, sizeof(buf));
-			if (read(msg_fd, buf, sizeof(buf)) < 0) {
-				fprintf(stderr, "read: %s\n", strerror(errno));
-				return NULL;
-			}
-			print_cli("\r\033[K" "%s", buf);
-		}
-
-		gettimeofday(&x.after, NULL);
-		if (calculate_timedelta(&x.before, &x.after) > 1) {
-			mscp_get_stats(m, &s);
-			x.total = s.total;
-			x.done = s.done;
-
-			print_progress(&x.before, &x.after, x.total, x.last, x.done,
-				       false);
-			x.before = x.after;
-			x.last = x.done;
-		}
+		print_stat(false);
+		sleep(1);
 	}
 
-	pthread_cleanup_pop(1);
 	return NULL;
 }

src/message.c

@@ -1,49 +0,0 @@
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <limits.h>
-#include <pthread.h>
-
-#include <util.h>
-#include <message.h>
-
-/* strerror_r wrapper */
-__thread char thread_strerror[128];
-
-/* mscp error message buffer */
-#define MSCP_ERRMSG_SIZE	(PATH_MAX * 2)
-
-static char errmsg[MSCP_ERRMSG_SIZE];
-
-void _mscp_set_error(const char *fmt, ...)
-{
-	va_list va;
-
-	memset(errmsg, 0, sizeof(errmsg));
-	va_start(va, fmt);
-	vsnprintf(errmsg, sizeof(errmsg) - 1, fmt, va);
-	va_end(va);
-}
-
-const char *mscp_get_error()
-{
-	return errmsg;
-}
-
-
-/* message print functions */
-
-static int mprint_severity = MSCP_SEVERITY_WARN;
-
-void mprint_set_severity(int serverity)
-{
-	if (serverity < 0)
-		mprint_severity = -1; /* no print */
-	mprint_severity = serverity;
-}
-
-int mprint_get_severity()
-{
-	return mprint_severity;
-}
-

src/message.h

@@ -1,55 +0,0 @@
-#ifndef _MESSAGE_H_
-#define _MESSAGE_H_
-
-#include <libgen.h>
-
-#include <mscp.h>
-
-/* message print. printed messages are passed to application via msg_fd */
-void mprint_set_severity(int severity);
-int mprint_get_severity();
-
-#define mprint(fp, severity, fmt, ...)				\
-	do {							\
-		if (fp && severity <= mprint_get_severity()) {	\
-			fprintf(fp, fmt, ##__VA_ARGS__);	\
-			fflush(fp);				\
-		}						\
-	} while (0)
-
-#define mpr_err(fp, fmt, ...)					\
-	mprint(fp, MSCP_SEVERITY_ERR, fmt, ##__VA_ARGS__)
-#define mpr_warn(fp, fmt, ...)					\
-	mprint(fp, MSCP_SEVERITY_WARN, fmt, ##__VA_ARGS__)
-#define mpr_notice(fp, fmt, ...)				\
-	mprint(fp, MSCP_SEVERITY_NOTICE, fmt, ##__VA_ARGS__)
-#define mpr_info(fp, fmt, ...)					\
-	mprint(fp, MSCP_SEVERITY_INFO, fmt, ##__VA_ARGS__)
-#define mpr_debug(fp, fmt, ...)					\
-	mprint(fp, MSCP_SEVERITY_DEBUG, fmt, ##__VA_ARGS__)
-
-
-/* errorno wrapper */
-extern __thread char thread_strerror[128];
-
-#ifdef _GNU_SOURCE
-/* GNU strerror_r */
-#define strerrno()							\
-	strerror_r(errno, thread_strerror, sizeof(thread_strerror))
-#else
-/* this macro assumes that strerror_r never fails. any good way? */
-#define strerrno()							\
-	(strerror_r(errno, thread_strerror, sizeof(thread_strerror))    \
-	 ? thread_strerror : thread_strerror)
-#endif
-
-
-
-/* error message buffer */
-#define mscp_set_error(fmt, ...)					\
-	_mscp_set_error("%s:%d:%s: " fmt "\0",				\
-			basename(__FILE__), __LINE__, __func__, ##__VA_ARGS__)
-
-void _mscp_set_error(const char *fmt, ...);
-
-#endif /* _MESSAGE_H_ */

src/minmax.h

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _MINMAX_H_
+#define _MINMAX_H_
+
+#define min(a, b) (((a) > (b)) ? (b) : (a))
+#define max(a, b) (((a) > (b)) ? (a) : (b))
+
+#endif /* _MINMAX_H_ */

src/openbsd-compat/openbsd-compat.h

@@ -0,0 +1,10 @@
+#ifndef _OPENBSD_COMPAT_H
+#define _OPENBSD_COMPAT_H
+
+#include "config.h"
+
+#ifndef HAVE_STRLCAT
+size_t strlcat(char *dst, const char *src, size_t siz);
+#endif
+
+#endif /* _OPENBSD_COMPAT_H_ */

src/openbsd-compat/strlcat.c

@@ -0,0 +1,62 @@
+/*	$OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $	*/
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */
+
+#include "config.h"
+#ifndef HAVE_STRLCAT
+
+#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return(dlen + (s - src));	/* count does not include NUL */
+}
+
+#endif /* !HAVE_STRLCAT */

src/path.c

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #include <string.h>
 #include <unistd.h>
 #include <dirent.h>
@@ -6,283 +7,254 @@
 #include <assert.h>
 
 #include <ssh.h>
-#include <util.h>
-#include <list.h>
+#include <minmax.h>
+#include <fileops.h>
 #include <atomic.h>
 #include <path.h>
-#include <message.h>
-
-
-/* chunk pool operations */
-#define CHUNK_POOL_STATE_FILLING	0
-#define CHUNK_POOL_STATE_FILLED		1
-
-void chunk_pool_init(struct chunk_pool *cp)
-{
-	memset(cp, 0, sizeof(*cp));
-	INIT_LIST_HEAD(&cp->list);
-	lock_init(&cp->lock);
-	cp->state = CHUNK_POOL_STATE_FILLING;
-}
-
-static void chunk_pool_add(struct chunk_pool *cp, struct chunk *c)
-{
-	LOCK_ACQUIRE(&cp->lock);
-	list_add_tail(&c->list, &cp->list);
-	cp->count += 1;
-	LOCK_RELEASE();
-}
-
-void chunk_pool_set_filled(struct chunk_pool *cp)
-{
-	cp->state = CHUNK_POOL_STATE_FILLED;
-}
-
-bool chunk_pool_is_filled(struct chunk_pool *cp)
-{
-	return (cp->state == CHUNK_POOL_STATE_FILLED);
-}
-
-size_t chunk_pool_size(struct chunk_pool *cp)
-{
-	return cp->count;
-}
-
-
-struct chunk *chunk_pool_pop(struct chunk_pool *cp)
-{
-	struct list_head *first;
-	struct chunk *c = NULL;
-
-	LOCK_ACQUIRE(&cp->lock);
-	first = cp->list.next;
-	if (list_empty(&cp->list)) {
-		if (!chunk_pool_is_filled(cp))
-			c = CHUNK_POP_WAIT;
-		else
-			c = NULL; /* no more chunks */
-	} else {
-		c = list_entry(first, struct chunk, list);
-		list_del(first);
-	}
-	LOCK_RELEASE();
-
-	/* return CHUNK_POP_WAIT would be very rare case, because it
-	 * means copying over SSH is faster than traversing
-	 * local/remote file paths.
-	 */
-
-	return c;
-}
-
-static void chunk_free(struct list_head *list)
-{
-        struct chunk *c;
-        c = list_entry(list, typeof(*c), list);
-        free(c);
-}
-
-void chunk_pool_release(struct chunk_pool *cp)
-{
-	list_free_f(&cp->list, chunk_free);
-}
+#include <strerrno.h>
+#include <print.h>
 
 /* paths of copy source resoltion */
-static int resolve_dst_path(const char *src_file_path, char *dst_file_path,
-			    struct path_resolve_args *a)
+static char *resolve_dst_path(const char *src_file_path, struct path_resolve_args *a)
 {
-        char copy[PATH_MAX];
-        char *prefix;
-        int offset;
+	char copy[PATH_MAX + 1], dst_file_path[PATH_MAX + 1];
+	char *prefix;
+	int offset;
+	int ret;
 
-        strncpy(copy, a->src_path, PATH_MAX - 1);
-        prefix = dirname(copy);
-        if (!prefix) {
-                mscp_set_error("dirname: %s", strerrno());
-                return -1;
-        }
-        if (strlen(prefix) == 1 && prefix[0] == '.')
-                offset = 0;
-        else
-                offset = strlen(prefix) + 1;
+	strncpy(copy, a->src_path, PATH_MAX);
+	prefix = dirname(copy);
+	if (!prefix) {
+		pr_err("dirname: %s", strerrno());
+		return NULL;
+	}
 
-        if (!a->src_path_is_dir && !a->dst_path_is_dir) {
-                /* src path is file. dst path is (1) file, or (2) does not exist.
+	offset = strlen(prefix) + 1;
+	if (strlen(prefix) == 1) { /* corner cases */
+		switch (prefix[0]) {
+		case '.':
+			offset = 0;
+			break;
+		case '/':
+			offset = 1;
+			break;
+		}
+	}
+
+	if (!a->src_path_is_dir && !a->dst_path_is_dir) {
+		/* src path is file. dst path is (1) file, or (2) does not exist.
                  * In the second case, we need to put src under the dst.
                  */
-                if (a->dst_path_should_dir)
-                        snprintf(dst_file_path, PATH_MAX - 1, "%s/%s",
-                                 a->dst_path, a->src_path + offset);
-                else
-                        strncpy(dst_file_path, a->dst_path, PATH_MAX - 1);
-        }
+		if (a->dst_path_should_dir)
+			ret = snprintf(dst_file_path, PATH_MAX, "%s/%s", a->dst_path,
+				       a->src_path + offset);
+		else
+			ret = snprintf(dst_file_path, PATH_MAX, "%s", a->dst_path);
+	}
 
-        /* src is file, and dst is dir */
-        if (!a->src_path_is_dir && a->dst_path_is_dir)
-                snprintf(dst_file_path, PATH_MAX - 1, "%s/%s",
-			 a->dst_path, a->src_path + offset);
+	/* src is file, and dst is dir */
+	if (!a->src_path_is_dir && a->dst_path_is_dir)
+		ret = snprintf(dst_file_path, PATH_MAX, "%s/%s", a->dst_path,
+			       a->src_path + offset);
 
-        /* both are directory */
-        if (a->src_path_is_dir && a->dst_path_is_dir)
-                snprintf(dst_file_path, PATH_MAX - 1, "%s/%s",
-			 a->dst_path, src_file_path + offset);
+	/* both are directory */
+	if (a->src_path_is_dir && a->dst_path_is_dir)
+		ret = snprintf(dst_file_path, PATH_MAX, "%s/%s", a->dst_path,
+			       src_file_path + offset);
 
-        /* dst path does not exist. change dir name to dst_path */
-        if (a->src_path_is_dir && !a->dst_path_is_dir)
-                snprintf(dst_file_path, PATH_MAX - 1, "%s/%s",
-                         a->dst_path, src_file_path + strlen(a->src_path) + 1);
+	/* dst path does not exist. change dir name to dst_path */
+	if (a->src_path_is_dir && !a->dst_path_is_dir)
+		ret = snprintf(dst_file_path, PATH_MAX, "%s/%s", a->dst_path,
+			       src_file_path + strlen(a->src_path) + 1);
 
-        mpr_debug(a->msg_fp, "file: %s -> %s\n", src_file_path, dst_file_path);
+	if (ret >= PATH_MAX) {
+		pr_warn("Too long path: %s", dst_file_path);
+		return NULL;
+	}
 
-        return 0;
+	pr_debug("file: %s -> %s", src_file_path, dst_file_path);
+
+	return strndup(dst_file_path, PATH_MAX);
 }
 
 /* chunk preparation */
-static struct chunk *alloc_chunk(struct path *p)
+struct chunk *alloc_chunk(struct path *p, size_t off, size_t len)
 {
-        struct chunk *c;
+	struct chunk *c;
 
-        if (!(c = malloc(sizeof(*c)))) {
-                mscp_set_error("malloc %s", strerrno());
-                return NULL;
-        }
-        memset(c, 0, sizeof(*c));
+	if (!(c = malloc(sizeof(*c)))) {
+		pr_err("malloc %s", strerrno());
+		return NULL;
+	}
+	memset(c, 0, sizeof(*c));
 
-        c->p = p;
-        c->off = 0;
-        c->len = 0;
-        refcnt_inc(&p->refcnt);
-        return c;
+	c->p = p;
+	c->off = off;
+	c->len = len;
+	c->state = CHUNK_STATE_INIT;
+	refcnt_inc(&p->refcnt);
+	return c;
 }
 
-static int resolve_chunk(struct path *p, struct path_resolve_args *a)
+static int resolve_chunk(struct path *p, size_t size, struct path_resolve_args *a)
 {
-        struct chunk *c;
-        size_t chunk_sz;
-        size_t size;
+	struct chunk *c;
+	size_t chunk_sz, off, len;
+	size_t remaind;
 
-        if (p->size <= a->min_chunk_sz)
-                chunk_sz = p->size;
-        else if (a->max_chunk_sz)
-                chunk_sz = a->max_chunk_sz;
-        else {
-                chunk_sz = (p->size - (p->size % a->nr_conn)) / a->nr_conn;
-                chunk_sz &= ~a->chunk_align; /* align with page_sz */
-                if (chunk_sz <= a->min_chunk_sz)
-                        chunk_sz = a->min_chunk_sz;
-        }
+	if (size <= a->min_chunk_sz)
+		chunk_sz = size;
+	else if (a->max_chunk_sz)
+		chunk_sz = a->max_chunk_sz;
+	else {
+		chunk_sz = (size - (size % a->nr_conn)) / a->nr_conn;
+		chunk_sz &= ~a->chunk_align; /* align with page_sz */
+		if (chunk_sz <= a->min_chunk_sz)
+			chunk_sz = a->min_chunk_sz;
+	}
 
-        /* for (size = f->size; size > 0;) does not create a file
-         * (chunk) when file size is 0. This do {} while (size > 0)
-         * creates just open/close a 0-byte file.
+	/* for (size = size; size > 0;) does not create a file (chunk)
+         * when file size is 0. This do {} while (remaind > 0) creates
+         * just open/close a 0-byte file.
          */
-        size = p->size;
-        do {
-                c = alloc_chunk(p);
-                if (!c)
-                        return -1;
-                c->off = p->size - size;
-                c->len = size < chunk_sz ? size : chunk_sz;
-                size -= c->len;
-                chunk_pool_add(a->cp, c);
-        } while (size > 0);
+	remaind = size;
+	do {
+		off = size - remaind;
+		len = remaind < chunk_sz ? remaind : chunk_sz;
+		c = alloc_chunk(p, off, len);
+		if (!c)
+			return -1;
 
-        return 0;
+		remaind -= len;
+		if (pool_push_lock(a->chunk_pool, c) < 0) {
+			pr_err("pool_push_lock: %s", strerrno());
+			return -1;
+		}
+	} while (remaind > 0);
+
+	return 0;
 }
 
-static int append_path(sftp_session sftp, const char *path, mstat s,
-		       struct list_head *path_list, struct path_resolve_args *a)
+void free_path(struct path *p)
+{
+	if (p->path)
+		free(p->path);
+	if (p->dst_path)
+		free(p->dst_path);
+	free(p);
+}
+
+struct path *alloc_path(char *path, char *dst_path)
 {
 	struct path *p;
 
 	if (!(p = malloc(sizeof(*p)))) {
-		mscp_set_error("failed to allocate memory: %s", strerrno());
+		pr_err("malloc: %s", strerrno());
+		return NULL;
+	}
+	memset(p, 0, sizeof(*p));
+
+	p->path = path;
+	p->dst_path = dst_path;
+	p->state = FILE_STATE_INIT;
+	lock_init(&p->lock);
+	p->data = 0;
+
+	return p;
+}
+
+static int append_path(sftp_session sftp, const char *path, struct stat st,
+		       struct path_resolve_args *a)
+{
+	struct path *p;
+	char *src, *dst;
+
+	if (!(src = strdup(path))) {
+		pr_err("strdup: %s", strerrno());
 		return -1;
 	}
 
-	memset(p, 0, sizeof(*p));
-	INIT_LIST_HEAD(&p->list);
-	strncpy(p->path, path, PATH_MAX - 1);
-	p->size = mstat_size(s);
-	p->mode = mstat_mode(s);
-	p->state = FILE_STATE_INIT;
-	lock_init(&p->lock);
+	if (!(dst = resolve_dst_path(src, a))) {
+		free(src);
+		return -1;
+	}
 
-	if (resolve_dst_path(p->path, p->dst_path, a) < 0)
-		goto free_out;
+	if (!(p = alloc_path(src, dst)))
+		return -1;
 
-	if (resolve_chunk(p, a) < 0)
+	if (resolve_chunk(p, st.st_size, a) < 0)
 		return -1; /* XXX: do not free path becuase chunk(s)
 			    * was added to chunk pool already */
 
-	list_add_tail(&p->list, path_list);
-	*a->total_bytes += p->size;
+	if (pool_push_lock(a->path_pool, p) < 0) {
+		pr_err("pool_push: %s", strerrno());
+		goto free_out;
+	}
+
+	*a->total_bytes += st.st_size;
 
 	return 0;
 
 free_out:
-	free(p);
+	free_path(p);
 	return -1;
 }
 
 static bool check_path_should_skip(const char *path)
-{               
-        int len = strlen(path);
-        if ((len == 1 && strncmp(path, ".", 1) == 0) ||
-            (len == 2 && strncmp(path, "..", 2) == 0)) {
-                return true;
-        }
-        return false; 
+{
+	int len = strlen(path);
+	if ((len == 1 && strncmp(path, ".", 1) == 0) ||
+	    (len == 2 && strncmp(path, "..", 2) == 0)) {
+		return true;
+	}
+	return false;
 }
 
 static int walk_path_recursive(sftp_session sftp, const char *path,
-			       struct list_head *path_list, struct path_resolve_args *a)
+			       struct path_resolve_args *a)
 {
-	char next_path[PATH_MAX];
-	mdirent *e;
-	mdir *d;
-	mstat s;
+	char next_path[PATH_MAX + 1];
+	struct dirent *e;
+	struct stat st;
+	MDIR *d;
 	int ret;
 
-	if (mscp_stat(path, &s, sftp) < 0)
+	if (mscp_stat(path, &st, sftp) < 0) {
+		pr_err("stat: %s: %s", path, strerrno());
 		return -1;
+	}
 
-	if (mstat_is_regular(s)) {
+	if (S_ISREG(st.st_mode)) {
 		/* this path is regular file. it is to be copied */
-		ret = append_path(sftp, path, s, path_list, a);
-		mscp_stat_free(s);
-		return ret;
+		return append_path(sftp, path, st, a);
 	}
 
-	if (!mstat_is_dir(s)) {
-		/* not regular file and not directory, skip it. */
-		mscp_stat_free(s);
-		return 0; 
-	}
+	if (!S_ISDIR(st.st_mode))
+		return 0; /* not a regular file and not a directory, skip it. */
 
-	mscp_stat_free(s);
-
-
-	/* ok, this path is directory. walk it. */
-	if (!(d = mscp_opendir(path, sftp)))
+	/* ok, this path is a directory. walk through it. */
+	if (!(d = mscp_opendir(path, sftp))) {
+		pr_err("opendir: %s: %s", path, strerrno());
 		return -1;
-	
-	for (e = mscp_readdir(d); !mdirent_is_null(e); e = mscp_readdir(d)) {
-		if (check_path_should_skip(mdirent_name(e))) {
-			mscp_dirent_free(e);
+	}
+
+	for (e = mscp_readdir(d); e; e = mscp_readdir(d)) {
+		if (check_path_should_skip(e->d_name))
+			continue;
+
+		ret = snprintf(next_path, PATH_MAX, "%s/%s", path, e->d_name);
+		if (ret >= PATH_MAX) {
+			pr_warn("Too long path: %s/%s", path, e->d_name);
 			continue;
 		}
-		
-		if (strlen(path) + 1 + strlen(mdirent_name(e)) > PATH_MAX) {
-			mscp_set_error("too long path: %s/%s", path, mdirent_name(e));
-			mscp_dirent_free(e);
-			return -1;
-		}
-		snprintf(next_path, sizeof(next_path), "%s/%s", path, mdirent_name(e));
-		ret = walk_path_recursive(sftp, next_path, path_list, a);
-		mscp_dirent_free(e);
-		if (ret < 0)
-			return ret;
+
+		walk_path_recursive(sftp, next_path, a);
+		/* do not stop even when walk_path_recursive returns
+		 * -1 due to an unreadable file. go to a next
+		 * file. Thus, do not pass error messages via
+		 * priv_set_err() under walk_path_recursive.  Print
+		 * the error with pr_err immediately.
+		 */
 	}
 
 	mscp_closedir(d);
@@ -291,75 +263,64 @@ static int walk_path_recursive(sftp_session sftp, const char *path,
 }
 
 int walk_src_path(sftp_session src_sftp, const char *src_path,
-		  struct list_head *path_list, struct path_resolve_args *a)
+		  struct path_resolve_args *a)
 {
-	return walk_path_recursive(src_sftp, src_path, path_list, a);
+	return walk_path_recursive(src_sftp, src_path, a);
 }
 
-void path_dump(struct list_head *path_list)
-{
-	struct path *p;
-
-	list_for_each_entry(p, path_list, list) {
-		printf("src: %s %lu-byte\n", p->path, p->size);
-		printf("dst: %s\n", p->dst_path);
-	}
-}
-	
-
-
 /* based on
  * https://stackoverflow.com/questions/2336242/recursive-mkdir-system-call-on-unix */
 static int touch_dst_path(struct path *p, sftp_session sftp)
 {
-        /* XXX: should reflect the permission of the original directory? */
-        mode_t mode =  S_IRWXU | S_IRWXG | S_IRWXO;
-        char path[PATH_MAX];
-        char *needle;
-        int ret;
-	mfh h;
+	/* XXX: should reflect the permission of the original directory? */
+	mode_t mode = S_IRWXU | S_IRWXG | S_IRWXO;
+	struct stat st;
+	char path[PATH_MAX];
+	char *needle;
+	int ret;
+	mf *f;
 
-        strncpy(path, p->dst_path, sizeof(path));
+	strncpy(path, p->dst_path, sizeof(path));
 
-        /* mkdir -p.
+	/* mkdir -p.
 	 * XXX: this may be slow when dst is the remote side. need speed-up. */
-        for (needle = strchr(path + 1, '/'); needle; needle = strchr(needle + 1, '/')) {
-                *needle = '\0';
+	for (needle = strchr(path + 1, '/'); needle; needle = strchr(needle + 1, '/')) {
+		*needle = '\0';
 
-		mstat s;
-		if (mscp_stat(path, &s, sftp) == 0) {
-			if (mstat_is_dir(s)) {
-				mscp_stat_free(s);
+		if (mscp_stat(path, &st, sftp) == 0) {
+			if (S_ISDIR(st.st_mode))
 				goto next; /* directory exists. go deeper */
-			} else {
-				mscp_stat_free(s);
+			else {
+				priv_set_errv("mscp_stat %s: not a directory", path);
 				return -1; /* path exists, but not directory. */
 			}
 		}
 
-		if (mscp_stat_check_err_noent(sftp) == 0) {
+		if (errno == ENOENT) {
 			/* no file on the path. create directory. */
 			if (mscp_mkdir(path, mode, sftp) < 0) {
-				mscp_set_error("mkdir %s: %s", path,
-					       mscp_strerror(sftp));
+				priv_set_errv("mscp_mkdir %s: %s", path, strerrno());
 				return -1;
 			}
 		}
-        next:
-                *needle = '/';
-        }
+next:
+		*needle = '/';
+	}
 
-        /* open file with O_TRUNC to set file size 0 */
-	h = mscp_open(p->dst_path, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR, 0, sftp);
-	if (mscp_open_is_failed(h))
+	/* Do not set O_TRUNC here. Instead, do mscp_setstat() at the
+	 * end. see https://bugzilla.mindrot.org/show_bug.cgi?id=3431 */
+	f = mscp_open(p->dst_path, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR, sftp);
+	if (!f) {
+		priv_set_errv("mscp_open %s: %s", p->dst_path, strerrno());
 		return -1;
+	}
 
-	mscp_close(h);
+	mscp_close(f);
 
-        return 0;
+	return 0;
 }
 
-static int prepare_dst_path(FILE *msg_fp, struct path *p, sftp_session dst_sftp)
+static int prepare_dst_path(struct path *p, sftp_session dst_sftp)
 {
 	int ret = 0;
 
@@ -370,7 +331,7 @@ static int prepare_dst_path(FILE *msg_fp, struct path *p, sftp_session dst_sftp)
 			goto out;
 		}
 		p->state = FILE_STATE_OPENED;
-		mpr_info(msg_fp, "copy start: %s\n", p->path);
+		pr_info("copy start: %s", p->path);
 	}
 
 out:
@@ -378,195 +339,199 @@ out:
 	return ret;
 }
 
-
 /* functions for copy */
 
 static ssize_t read_to_buf(void *ptr, size_t len, void *userdata)
 {
-        int fd = *((int *)userdata);
-        return read(fd, ptr, len);
+	int fd = *((int *)userdata);
+	return read(fd, ptr, len);
 }
 
-static int copy_chunk_l2r(struct chunk *c, int fd, sftp_file sf,
-			  int nr_ahead, int buf_sz, size_t *counter)
+static int copy_chunk_l2r(struct chunk *c, int fd, sftp_file sf, int nr_ahead, int buf_sz,
+			  size_t *counter)
 {
-        ssize_t read_bytes, remaind, thrown;
-        int idx, ret;
-        struct {
-                uint32_t id;
-                ssize_t  len;
-        } reqs[nr_ahead];
+	ssize_t read_bytes, remaind, thrown;
+	int idx, ret;
+	struct {
+		uint32_t id;
+		ssize_t len;
+	} reqs[nr_ahead];
 
-        if (c->len == 0)
-                return 0;
+	if (c->len == 0)
+		return 0;
 
-        remaind = thrown = c->len;
-        for (idx = 0; idx < nr_ahead && thrown > 0; idx++) {
-                reqs[idx].len = min(thrown, buf_sz);
-                reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
-                                                 &reqs[idx].id);
-                if (reqs[idx].len < 0) {
-                        mscp_set_error("sftp_async_write: %s or %s",
-				       sftp_get_ssh_error(sf->sftp), strerrno());
-                        return -1;
-                }
-                thrown -= reqs[idx].len;
-        }
+	remaind = thrown = c->len;
+	for (idx = 0; idx < nr_ahead && thrown > 0; idx++) {
+		reqs[idx].len = min(thrown, buf_sz);
+		reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
+						 &reqs[idx].id);
+		if (reqs[idx].len < 0) {
+			priv_set_errv("sftp_async_write: %s",
+				      sftp_get_ssh_error(sf->sftp));
+			return -1;
+		}
+		thrown -= reqs[idx].len;
+	}
 
-        for (idx = 0; remaind > 0; idx = (idx + 1) % nr_ahead) {
-                ret = sftp_async_write_end(sf, reqs[idx].id, 1);
-                if (ret != SSH_OK) {
-                        mscp_set_error("sftp_async_write_end: %s",
-				       sftp_get_ssh_error(sf->sftp));
-                        return -1;
-                }
+	for (idx = 0; remaind > 0; idx = (idx + 1) % nr_ahead) {
+		ret = sftp_async_write_end(sf, reqs[idx].id, 1);
+		if (ret != SSH_OK) {
+			priv_set_errv("sftp_async_write_end: %s",
+				      sftp_get_ssh_error(sf->sftp));
+			return -1;
+		}
 
-                *counter += reqs[idx].len;
-                remaind -= reqs[idx].len;
+		*counter += reqs[idx].len;
+		remaind -= reqs[idx].len;
 
-                if (remaind <= 0)
-                        break;
+		if (remaind <= 0)
+			break;
 
-                if (thrown <= 0)
-                        continue;
+		if (thrown <= 0)
+			continue;
 
-                reqs[idx].len = min(thrown, buf_sz);
-                reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
-                                                 &reqs[idx].id);
-                if (reqs[idx].len < 0) {
-                        mscp_set_error("sftp_async_write: %s or %s",
-				       sftp_get_ssh_error(sf->sftp), strerrno());
-                        return -1;
-                }
-                thrown -= reqs[idx].len;
-        }
+		reqs[idx].len = min(thrown, buf_sz);
+		reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
+						 &reqs[idx].id);
+		if (reqs[idx].len < 0) {
+			priv_set_errv("sftp_async_write: %s",
+				      sftp_get_ssh_error(sf->sftp));
+			return -1;
+		}
+		thrown -= reqs[idx].len;
+	}
 
-        if (remaind < 0) {
-                mscp_set_error("invalid remaind bytes %ld. "
-			       "last async_write_end bytes %lu.",
-			       remaind, reqs[idx].len);
-                return -1;
-        }
-
-        return 0;
+	if (remaind < 0) {
+		priv_set_errv("invalid remaind bytes %ld. "
+			      "last async_write_end bytes %lu.",
+			      remaind, reqs[idx].len);
+		return -1;
+	}
 
+	return 0;
 }
 
-static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd,
-			  int nr_ahead, int buf_sz, size_t *counter)
+static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd, int nr_ahead, int buf_sz,
+			  size_t *counter)
 {
-        ssize_t read_bytes, write_bytes, remaind, thrown;
-        char buf[buf_sz];
-        int idx;
-        struct {
-                int id;
-                ssize_t len;
-        } reqs[nr_ahead];
+	ssize_t read_bytes, write_bytes, remaind, thrown;
+	char buf[buf_sz];
+	int idx;
+	struct {
+		int id;
+		ssize_t len;
+	} reqs[nr_ahead];
 
-        if (c->len == 0)
-                return 0;
+	if (c->len == 0)
+		return 0;
 
-        remaind = thrown = c->len;
+	remaind = thrown = c->len;
 
-        for (idx = 0; idx < nr_ahead && thrown > 0; idx++) {
-                reqs[idx].len = min(thrown, sizeof(buf));
-                reqs[idx].id = sftp_async_read_begin(sf, reqs[idx].len);
-                if (reqs[idx].id < 0) {
-                        mscp_set_error("sftp_async_read_begin: %d",
-				       sftp_get_error(sf->sftp));
-                        return -1;
-                }
-                thrown -= reqs[idx].len;
-        }
+	for (idx = 0; idx < nr_ahead && thrown > 0; idx++) {
+		reqs[idx].len = min(thrown, sizeof(buf));
+		reqs[idx].id = sftp_async_read_begin(sf, reqs[idx].len);
+		if (reqs[idx].id < 0) {
+			priv_set_errv("sftp_async_read_begin: %d",
+				      sftp_get_error(sf->sftp));
+			return -1;
+		}
+		thrown -= reqs[idx].len;
+	}
 
-        for (idx = 0; remaind > 0; idx = (idx + 1) % nr_ahead) {
-                read_bytes = sftp_async_read(sf, buf, reqs[idx].len, reqs[idx].id);
-                if (read_bytes == SSH_ERROR) {
-                        mscp_set_error("sftp_async_read: %d",
-				       sftp_get_error(sf->sftp));
-                        return -1;
-                }
+	for (idx = 0; remaind > 0; idx = (idx + 1) % nr_ahead) {
+		read_bytes = sftp_async_read(sf, buf, reqs[idx].len, reqs[idx].id);
+		if (read_bytes == SSH_ERROR) {
+			priv_set_errv("sftp_async_read: %d", sftp_get_error(sf->sftp));
+			return -1;
+		}
 
-                if (thrown > 0) {
-                        reqs[idx].len = min(thrown, sizeof(buf));
-                        reqs[idx].id = sftp_async_read_begin(sf, reqs[idx].len);
-                        thrown -= reqs[idx].len;
-                }
+		if (thrown > 0) {
+			reqs[idx].len = min(thrown, sizeof(buf));
+			reqs[idx].id = sftp_async_read_begin(sf, reqs[idx].len);
+			thrown -= reqs[idx].len;
+		}
 
-                write_bytes = write(fd, buf, read_bytes);
-                if (write_bytes < 0) {
-                        mscp_set_error("write: %s", strerrno());
-                        return -1;
-                }
+		write_bytes = write(fd, buf, read_bytes);
+		if (write_bytes < 0) {
+			priv_set_errv("write: %s", strerrno());
+			return -1;
+		}
 
-                if (write_bytes < read_bytes) {
-                        mscp_set_error("failed to write full bytes");
-                        return -1;
-                }
+		if (write_bytes < read_bytes) {
+			priv_set_errv("failed to write full bytes");
+			return -1;
+		}
 
-                *counter += write_bytes;
-                remaind -= read_bytes;
-        }
+		*counter += write_bytes;
+		remaind -= read_bytes;
+	}
 
-        if (remaind < 0) {
-                mscp_set_error("invalid remaind bytes %ld. last async_read bytes %ld. "
-			       "last write bytes %ld",
-			       remaind, read_bytes, write_bytes);
-                return -1;
-        }
+	if (remaind < 0) {
+		priv_set_errv("invalid remaind bytes %ld. last async_read bytes %ld. "
+			      "last write bytes %ld",
+			      remaind, read_bytes, write_bytes);
+		return -1;
+	}
 
-        return 0;
+	return 0;
 }
 
-static int _copy_chunk(struct chunk *c, mfh s, mfh d,
-		       int nr_ahead, int buf_sz, size_t *counter)
+static int _copy_chunk(struct chunk *c, mf *s, mf *d, int nr_ahead, int buf_sz,
+		       size_t *counter)
 {
-	if (s.fd > 0 && d.sf) /* local to remote copy */
-		return copy_chunk_l2r(c, s.fd, d.sf, nr_ahead, buf_sz, counter);
-	else if (s.sf && d.fd > 0)  /* remote to local copy */
-		return copy_chunk_r2l(c, s.sf, d.fd, nr_ahead, buf_sz, counter);
+	if (s->local && d->remote) /* local to remote copy */
+		return copy_chunk_l2r(c, s->local, d->remote, nr_ahead, buf_sz, counter);
+	else if (s->remote && d->local) /* remote to local copy */
+		return copy_chunk_r2l(c, s->remote, d->local, nr_ahead, buf_sz, counter);
 
-	assert(true); /* not reached */
-	return -1;
+	assert(false);
+	return -1; /* not reached */
 }
 
-int copy_chunk(FILE *msg_fp, struct chunk *c,
-	       sftp_session src_sftp, sftp_session dst_sftp,
-	       int nr_ahead, int buf_sz, size_t *counter)
+int copy_chunk(struct chunk *c, sftp_session src_sftp, sftp_session dst_sftp,
+	       int nr_ahead, int buf_sz, bool preserve_ts, size_t *counter)
 {
 	mode_t mode;
 	int flags;
-	mfh s, d;
+	mf *s, *d;
 	int ret;
 
 	assert((src_sftp && !dst_sftp) || (!src_sftp && dst_sftp));
 
-	if (prepare_dst_path(msg_fp, c->p, dst_sftp) < 0)
+	if (prepare_dst_path(c->p, dst_sftp) < 0)
 		return -1;
 
 	/* open src */
-        flags = O_RDONLY;
-        mode = S_IRUSR;
-	s = mscp_open(c->p->path, flags, mode, c->off, src_sftp);
-	if (mscp_open_is_failed(s)) {
-		mscp_close(d);
+	flags = O_RDONLY;
+	mode = S_IRUSR;
+	if (!(s = mscp_open(c->p->path, flags, mode, src_sftp))) {
+		priv_set_errv("mscp_open: %s: %s", c->p->path, strerrno());
+		return -1;
+	}
+	if (mscp_lseek(s, c->off) < 0) {
+		priv_set_errv("mscp_lseek: %s: %s", c->p->path, strerrno());
 		return -1;
 	}
 
 	/* open dst */
-        flags = O_WRONLY;
-        mode = S_IRUSR|S_IWUSR;
-	d = mscp_open(c->p->dst_path, flags, mode, c->off, dst_sftp);
-	if (mscp_open_is_failed(d))
+	flags = O_WRONLY;
+	mode = S_IRUSR | S_IWUSR;
+	if (!(d = mscp_open(c->p->dst_path, flags, mode, dst_sftp))) {
+		mscp_close(s);
+		priv_set_errv("mscp_open: %s: %s", c->p->dst_path, strerrno());
 		return -1;
+	}
+	if (mscp_lseek(d, c->off) < 0) {
+		priv_set_errv("mscp_lseek: %s: %s", c->p->dst_path, strerrno());
+		return -1;
+	}
+
+	c->state = CHUNK_STATE_COPING;
+	pr_debug("copy chunk start: %s 0x%lx-0x%lx", c->p->path, c->off, c->off + c->len);
 
-	mpr_debug(msg_fp, "copy chunk start: %s 0x%lx-0x%lx\n",
-		  c->p->path, c->off, c->off + c->len);
 	ret = _copy_chunk(c, s, d, nr_ahead, buf_sz, counter);
 
-	mpr_debug(msg_fp, "copy chunk done: %s 0x%lx-0x%lx\n",
-		  c->p->path, c->off, c->off + c->len);
-
+	pr_debug("copy chunk done: %s 0x%lx-0x%lx", c->p->path, c->off, c->off + c->len);
 
 	mscp_close(d);
 	mscp_close(s);
@@ -574,10 +539,23 @@ int copy_chunk(FILE *msg_fp, struct chunk *c,
 		return ret;
 
 	if (refcnt_dec(&c->p->refcnt) == 0) {
+		struct stat st;
 		c->p->state = FILE_STATE_DONE;
-		mscp_chmod(c->p->dst_path, c->p->mode, dst_sftp);
-		mpr_info(msg_fp, "copy done: %s\n", c->p->path);
+
+		/* sync stat */
+		if (mscp_stat(c->p->path, &st, src_sftp) < 0) {
+			priv_set_errv("mscp_stat: %s: %s", c->p->path, strerrno());
+			return -1;
+		}
+		if (mscp_setstat(c->p->dst_path, &st, preserve_ts, dst_sftp) < 0) {
+			priv_set_errv("mscp_setstat: %s: %s", c->p->path, strerrno());
+			return -1;
+		}
+		pr_info("copy done: %s", c->p->path);
 	}
 
+	if (ret == 0)
+		c->state = CHUNK_STATE_DONE;
+
 	return ret;
 }

src/path.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifndef _PATH_H_
 #define _PATH_H_
 
@@ -5,346 +6,66 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include <sys/stat.h>
-
-#include <list.h>
+#include <pool.h>
 #include <atomic.h>
 #include <ssh.h>
-#include <message.h>
 
 struct path {
-	struct list_head	list;	/* mscp->path_list */
+	char *path; /* file path */
+	char *dst_path; /* copy dst path */
 
-	char	path[PATH_MAX];		/* file path */
-	size_t	size;			/* size of file on this path */
-	mode_t	mode;			/* permission */
+	refcnt refcnt; /* number of associated chunks */
+	lock lock;
+	int state;
+#define FILE_STATE_INIT 0
+#define FILE_STATE_OPENED 1
+#define FILE_STATE_DONE 2
 
-	char	dst_path[PATH_MAX];	/* copy dst path */
-
-	int	state;
-	lock	lock;
-	refcnt	refcnt;
+	uint64_t data; /* used by other components, i.e., checkpoint */
 };
-#define FILE_STATE_INIT         0
-#define FILE_STATE_OPENED       1
-#define FILE_STATE_DONE         2
+
+struct path *alloc_path(char *path, char *dst_path);
 
 struct chunk {
-	struct list_head	list;	/* chunk_pool->list */
-
 	struct path *p;
-	size_t	off;	/* offset of this chunk on the file on path p */
-	size_t	len;	/* length of this chunk */
-	size_t	done;	/* copied bytes for this chunk by a thread */
+	size_t off; /* offset of this chunk on the file on path p */
+	size_t len; /* length of this chunk */
+	int state;
+#define CHUNK_STATE_INIT 0
+#define CHUNK_STATE_COPING 1
+#define CHUNK_STATE_DONE 2
 };
 
-struct chunk_pool {
-        struct list_head        list; /* list of struct chunk */
-	size_t			count;
-        lock                    lock;
-        int                     state;
-};
-
-
-/* initialize chunk pool */
-void chunk_pool_init(struct chunk_pool *cp);
-
-/* acquire a chunk from pool. return value is NULL indicates no more
- * chunk, GET_CHUNK_WAIT means caller should waits until a chunk is
- * added, or pointer to chunk.
- */
-struct chunk *chunk_pool_pop(struct chunk_pool *cp);
-#define CHUNK_POP_WAIT ((void *) -1)
-
-/* set and check fillingchunks to this pool has finished */
-void chunk_pool_set_filled(struct chunk_pool *cp);
-bool chunk_pool_is_filled(struct chunk_pool *cp);
-
-/* return number of chunks in the pool */
-size_t chunk_pool_size(struct chunk_pool *cp);
-
-/* free chunks in the chunk_pool */
-void chunk_pool_release(struct chunk_pool *cp);
-
-
+struct chunk *alloc_chunk(struct path *p, size_t off, size_t len);
 
 struct path_resolve_args {
-        FILE	*msg_fp;
-	size_t	*total_bytes;
+	size_t *total_bytes;
 
-        /* args to resolve src path to dst path */
-        const char      *src_path;
-        const char      *dst_path;
-        bool            src_path_is_dir;
-        bool            dst_path_is_dir;
-        bool            dst_path_should_dir;
+	/* args to resolve src path to dst path */
+	const char *src_path;
+	const char *dst_path;
+	bool src_path_is_dir;
+	bool dst_path_is_dir;
+	bool dst_path_should_dir;
 
-        /* args to resolve chunks for a path */
-        struct chunk_pool *cp;
-        int             nr_conn;
-        size_t          min_chunk_sz;
-        size_t          max_chunk_sz;
-	size_t		chunk_align;
+	/* args to resolve chunks for a path */
+	pool *path_pool;
+	pool *chunk_pool;
+	int nr_conn;
+	size_t min_chunk_sz;
+	size_t max_chunk_sz;
+	size_t chunk_align;
 };
 
-/* recursivly walk through src_path and fill path_list for each file */
+/* walk src_path recursivly and fill a->path_pool with found files */
 int walk_src_path(sftp_session src_sftp, const char *src_path,
-		  struct list_head *path_list, struct path_resolve_args *a);
+		  struct path_resolve_args *a);
+
+/* free struct path */
+void free_path(struct path *p);
 
 /* copy a chunk. either src_sftp or dst_sftp is not null, and another is null */
-int copy_chunk(FILE *msg_fp, struct chunk *c,
-	       sftp_session src_sftp, sftp_session dst_sftp,
-	       int nr_ahead, int buf_sz, size_t *counter);
-
-/* just print contents. just for debugging */
-void path_dump(struct list_head *path_list);
-
-
-
-/* wrap DIR/dirent and sftp_dir/sftp_attribute. not thread safe */
-struct mscp_dir {
-        DIR *l;
-        sftp_dir r;
-        sftp_session sftp;
-};
-typedef struct mscp_dir mdir;
-
-struct mscp_dirent {
-        struct dirent *l;
-        sftp_attributes r;
-};
-typedef struct mscp_dirent mdirent;
-
-#define mdirent_name(e) ((e->l) ? e->l->d_name : e->r->name)
-#define mdirent_is_dir(e) ((e->l) ?                                     \
-                           (e->l->d_type == DT_DIR) :                   \
-                           (e->r->type == SSH_FILEXFER_TYPE_DIRECTORY))
-#define mdirent_is_null(e) (e->l == NULL && e->r == NULL)
-
-static mdir *mscp_opendir(const char *path, sftp_session sftp)
-{
-        mdir *d;
-
-        if (!(d = malloc(sizeof(*d))))
-                return NULL;
-        memset(d, 0, sizeof(*d));
-
-        d->sftp = sftp;
-
-        if (sftp) {
-                d->r = sftp_opendir(sftp, path);
-                if (!d->r) {
-                        mscp_set_error("sftp_opendir '%s': %s",
-				       path, sftp_get_ssh_error(sftp));
-                        free(d);
-                        return NULL;
-                }
-        } else {
-                d->l = opendir(path);
-                if (!d->l) {
-                        mscp_set_error("opendir '%s': %s", path, strerrno());
-                        free(d);
-                        return NULL;
-                }
-        }
-        return d;
-}
-
-static int mscp_closedir(mdir *d)
-{
-        int ret;
-        if (d->r)
-                ret = sftp_closedir(d->r);
-        else
-                ret = closedir(d->l);
-        free(d);
-        return ret;
-}
-
-static mdirent *mscp_readdir(mdir *d)
-{
-        static mdirent e;
-
-        memset(&e, 0, sizeof(e));
-        if (d->r)
-                e.r = sftp_readdir(d->sftp, d->r);
-        else
-                e.l = readdir(d->l);
-        return &e;
-}
-
-static void mscp_dirent_free(mdirent *e)
-{
-	if (e->r) {
-		sftp_attributes_free(e->r);
-		e->r = NULL;
-	}
-}
-
-/* wrap retriving error */
-static const char *mscp_strerror(sftp_session sftp)
-{
-	if (sftp)
-		return sftp_get_ssh_error(sftp);
-	return strerrno();
-}
-
-/* warp stat/sftp_stat */
-struct mscp_stat {
-        struct stat l;
-        sftp_attributes r;
-};
-typedef struct mscp_stat mstat;
-
-static int mscp_stat(const char *path, mstat *s, sftp_session sftp)
-{
-        memset(s, 0, sizeof(*s));
-
-        if (sftp) {
-                s->r = sftp_stat(sftp, path);
-                if (!s->r) {
-			mscp_set_error("sftp_stat: %s %s",
-				       sftp_get_ssh_error(sftp), path);
-                        return -1;
-		}
-        } else {
-                if (stat(path, &s->l) < 0) {
-			mscp_set_error("stat: %s %s", strerrno(), path);
-                        return -1;
-		}
-        }
-
-        return 0;
-}
-
-static int mscp_stat_check_err_noent(sftp_session sftp)
-{
-	if (sftp) {
-		if (sftp_get_error(sftp) == SSH_FX_NO_SUCH_PATH ||
-		    sftp_get_error(sftp) == SSH_FX_NO_SUCH_FILE)
-			return 0;
-	} else {
-		if (errno == ENOENT)
-			return 0;
-	}
-	return -1;
-}
-
-static void mscp_stat_free(mstat s) {
-        if (s.r)
-                sftp_attributes_free(s.r);
-}
-
-#define mstat_size(s) ((s.r) ? s.r->size : s.l.st_size)
-#define mstat_mode(s) ((s.r) ?                                  \
-                       s.r->permissions :                       \
-                       s.l.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO))
-#define mstat_is_regular(s) ((s.r) ?                                    \
-                             (s.r->type == SSH_FILEXFER_TYPE_REGULAR) : \
-                             S_ISREG(s.l.st_mode))
-#define mstat_is_dir(s) ((s.r) ?                        \
-                         (s.r->type == SSH_FILEXFER_TYPE_DIRECTORY) :   \
-                         S_ISDIR(s.l.st_mode))
-
-/* wrap mkdir */
-static int mscp_mkdir(const char *path, mode_t mode, sftp_session sftp)
-{
-	int ret;
-
-	if (sftp) {
-		ret = sftp_mkdir(sftp, path, mode);
-		if (ret < 0 &&
-		    sftp_get_error(sftp) != SSH_FX_FILE_ALREADY_EXISTS) {
-			mscp_set_error("sftp_mkdir '%s': %s",
-				       path, sftp_get_ssh_error(sftp));
-			return -1;
-		}
-	} else {
-		if (mkdir(path, mode) == -1 && errno != EEXIST) {
-			mscp_set_error("mkdir '%s': %s", path, strerrno());
-			return -1;
-		}
-	}
-
-	return 0;
-}
-
-/* wrap open/sftp_open */
-struct mscp_file_handle {
-	int fd;
-	sftp_file sf;
-};
-typedef struct mscp_file_handle mfh;
-
-static mfh mscp_open(const char *path, int flags, mode_t mode, size_t off,
-		      sftp_session sftp)
-{
-	mfh h;
-
-	h.fd = -1;
-	h.sf = NULL;
-
-	if (sftp) {
-		h.sf = sftp_open(sftp, path, flags, mode);
-		if (!h.sf) {
-			mscp_set_error("sftp_open '%s': %s",
-				       path, sftp_get_ssh_error(sftp));
-			return h;
-		}
-
-		if (sftp_seek64(h.sf, off) < 0) {
-			mscp_set_error("sftp_seek64 '%s': %s",
-				       path, sftp_get_ssh_error(sftp));
-			sftp_close(h.sf);
-			h.sf = NULL;
-			return h;
-		}
-	} else {
-		h.fd = open(path, flags, mode);
-		if (h.fd < 0) {
-			mscp_set_error("open '%s': %s", path, strerrno());
-			return h;
-		}
-		if (lseek(h.fd, off, SEEK_SET) < 0) {
-			mscp_set_error("lseek '%s': %s", path, strerrno());
-			close(h.fd);
-			h.fd = -1;
-			return h;
-		}
-	}
-
-	return h;
-}
-
-#define mscp_open_is_failed(h) (h.fd < 0 && h.sf == NULL)
-
-static void mscp_close(mfh h)
-{
-	if (h.sf)
-		sftp_close(h.sf);
-	if (h.fd > 0)
-		close(h.fd);
-	h.sf = NULL;
-	h.fd = -1;
-}
-
-/* wrap chmod/sftp_chmod */
-
-static int mscp_chmod(const char *path, mode_t mode, sftp_session sftp)
-{
-	if (sftp) {
-		if (sftp_chmod(sftp, path, mode) < 0)  {
-			mscp_set_error("sftp_chmod '%s': %s",
-				       path, sftp_get_ssh_error(sftp));
-			return -1;
-		}
-	} else {
-		if (chmod(path, mode) < 0) {
-			mscp_set_error("chmod '%s': %s", path, strerrno());
-			return -1;
-		}
-	}
-
-	return 0;
-}
+int copy_chunk(struct chunk *c, sftp_session src_sftp, sftp_session dst_sftp,
+	       int nr_ahead, int buf_sz, bool preserve_ts, size_t *counter);
 
 #endif /* _PATH_H_ */

src/platform.c

@@ -1,19 +1,31 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifdef __APPLE__
 #include <stdlib.h>
 #include <sys/types.h>
+#include <sys/time.h>
 #include <sys/sysctl.h>
 #elif linux
 #define _GNU_SOURCE
-#include <sched.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sched.h>
+#elif __FreeBSD__
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <pthread_np.h>
 #else
 #error unsupported platform
 #endif
 
-#include <util.h>
+#include <config.h>
 #include <platform.h>
-#include <message.h>
-
+#include <strerrno.h>
+#include <print.h>
 
 #ifdef __APPLE__
 int nr_cpus()
@@ -22,7 +34,7 @@ int nr_cpus()
 	size_t size = sizeof(n);
 
 	if (sysctlbyname("machdep.cpu.core_count", &n, &size, NULL, 0) != 0) {
-		mscp_set_error("failed to get number of cpu cores: %s", strerrno());
+		priv_set_errv("failed to get number of cpu cores: %s", strerrno());
 		return -1;
 	}
 
@@ -31,21 +43,35 @@ int nr_cpus()
 
 int set_thread_affinity(pthread_t tid, int core)
 {
-	pr_warn("setting thread afinity is not implemented on apple\n");
+	pr_warn("setting thread afinity is not implemented on apple");
 	return 0;
 }
 
+int setutimes(const char *path, struct timespec atime, struct timespec mtime)
+{
+	struct timeval tv[2] = {
+		{
+			.tv_sec = atime.tv_sec,
+			.tv_usec = atime.tv_nsec * 1000,
+		},
+		{
+			.tv_sec = mtime.tv_sec,
+			.tv_usec = mtime.tv_nsec * 1000,
+		},
+	};
+	return utimes(path, tv);
+}
 
 static void random_string(char *buf, size_t size)
 {
-        char chars[] = "abcdefhijklmnopqrstuvwxyz1234567890";
-        int n, x;
+	char chars[] = "abcdefhijklmnopqrstuvwxyz1234567890";
+	int n, x;
 
-        for (n = 0; n < size - 1; n++) {
-                x = arc4random() % (sizeof(chars) - 1);
-                buf[n] = chars[x];
-        }
-        buf[size - 1] = '\0';
+	for (n = 0; n < size - 1; n++) {
+		x = arc4random() % (sizeof(chars) - 1);
+		buf[n] = chars[x];
+	}
+	buf[size - 1] = '\0';
 }
 
 sem_t *sem_create(int value)
@@ -54,10 +80,10 @@ sem_t *sem_create(int value)
 	sem_t *sem;
 	int n;
 
-        n = strlen(sem_name);
-        random_string(sem_name + n, sizeof(sem_name) - n - 1);
-        if ((sem = sem_open(sem_name, O_CREAT, 600, value)) == SEM_FAILED)
-	    return NULL;
+	n = strlen(sem_name);
+	random_string(sem_name + n, sizeof(sem_name) - n - 1);
+	if ((sem = sem_open(sem_name, O_CREAT, 600, value)) == SEM_FAILED)
+		return NULL;
 
 	return sem;
 }
@@ -77,6 +103,17 @@ int nr_cpus()
 		return CPU_COUNT(&cpu_set);
 	return -1;
 }
+#endif
+
+#ifdef __FreeBSD__
+int nr_cpus()
+{
+	long nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+	return nr_cpus;
+}
+#endif
+
+#if defined(linux) || defined(__FreeBSD__)
 
 int set_thread_affinity(pthread_t tid, int core)
 {
@@ -87,8 +124,21 @@ int set_thread_affinity(pthread_t tid, int core)
 	CPU_SET(core, &target_cpu_set);
 	ret = pthread_setaffinity_np(tid, sizeof(target_cpu_set), &target_cpu_set);
 	if (ret < 0)
-		mscp_set_error("failed to set thread/cpu affinity for core %d: %s",
-			       core, strerrno());
+		priv_set_errv("failed to set thread/cpu affinity for core %d: %s", core,
+			      strerrno());
+	return ret;
+}
+
+int setutimes(const char *path, struct timespec atime, struct timespec mtime)
+{
+	struct timespec ts[2] = { atime, mtime };
+	int fd = open(path, O_WRONLY);
+	int ret;
+
+	if (fd < 0)
+		return -1;
+	ret = futimens(fd, ts);
+	close(fd);
 	return ret;
 }
 
@@ -114,4 +164,3 @@ int sem_release(sem_t *sem)
 }
 
 #endif
-

src/platform.h

@@ -1,11 +1,14 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifndef _PLATFORM_H_
 #define _PLATFORM_H_
 
 #include <pthread.h>
 #include <semaphore.h>
+#include <stdint.h>
 
 int nr_cpus(void);
 int set_thread_affinity(pthread_t tid, int core);
+int setutimes(const char *path, struct timespec atime, struct timespec mtime);
 
 /*
  * macOS does not support sem_init(). macOS (seems to) releases the
@@ -18,4 +21,25 @@ int set_thread_affinity(pthread_t tid, int core);
 sem_t *sem_create(int value);
 int sem_release(sem_t *sem);
 
+#ifdef HAVE_HTONLL
+#include <arpa/inet.h> /* Apple has htonll and ntohll in arpa/inet.h */
+#endif
+
+/* copied from libssh: libssh/include/libssh/priv.h*/
+#ifndef HAVE_HTONLL
+#ifdef WORDS_BIGENDIAN
+#define htonll(x) (x)
+#else
+#define htonll(x) (((uint64_t)htonl((x)&0xFFFFFFFF) << 32) | htonl((x) >> 32))
+#endif
+#endif
+
+#ifndef HAVE_NTOHLL
+#ifdef WORDS_BIGENDIAN
+#define ntohll(x) (x)
+#else
+#define ntohll(x) (((uint64_t)ntohl((x)&0xFFFFFFFF) << 32) | ntohl((x) >> 32))
+#endif
+#endif
+
 #endif /* _PLATFORM_H_ */

src/pool.c

@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#include <string.h>
+#include <stdlib.h>
+#include <pool.h>
+
+#define DEFAULT_START_SIZE 16
+
+pool *pool_new(void)
+{
+	pool *p;
+	p = malloc(sizeof(*p));
+	if (!p)
+		return NULL;
+	memset(p, 0, sizeof(*p));
+
+	p->array = calloc(DEFAULT_START_SIZE, sizeof(void *));
+	if (!p->array) {
+		free(p);
+		return NULL;
+	}
+
+	p->len = DEFAULT_START_SIZE;
+	p->num = 0;
+	lock_init(&p->lock);
+	return p;
+}
+
+void pool_free(pool *p)
+{
+	if (p->array) {
+		free(p->array);
+		p->array = NULL;
+	}
+	free(p);
+}
+
+void pool_zeroize(pool *p, pool_map_f f)
+{
+	void *v;
+	pool_iter_for_each(p, v) {
+		f(v);
+	}
+	p->num = 0;
+}
+
+void pool_destroy(pool *p, pool_map_f f)
+{
+	pool_zeroize(p, f);
+	pool_free(p);
+}
+
+int pool_push(pool *p, void *v)
+{
+	if (p->num == p->len) {
+		/* expand array */
+		size_t newlen = p->len * 2;
+		void *new = realloc(p->array, newlen * sizeof(void *));
+		if (new == NULL)
+			return -1;
+		p->len = newlen;
+		p->array = new;
+	}
+	p->array[p->num] = v;
+	__sync_synchronize();
+	p->num++;
+	return 0;
+}
+
+int pool_push_lock(pool *p, void *v)
+{
+	int ret = -1;
+	pool_lock(p);
+	ret = pool_push(p, v);
+	pool_unlock(p);
+	return ret;
+}
+
+void *pool_pop(pool *p)
+{
+	return p->num == 0 ? NULL : p->array[--p->num];
+}
+
+void *pool_pop_lock(pool *p)
+{
+	void *v;
+	pool_lock(p);
+	v = pool_pop(p);
+	pool_unlock(p);
+	return v;
+}
+
+void *pool_get(pool *p, unsigned int idx)
+{
+	return p->num <= idx ? NULL : p->array[idx];
+}
+
+void *pool_iter_next(pool *p)
+{
+	if (p->num <= p->idx)
+		return NULL;
+
+	void *v = p->array[p->idx];
+	p->idx++;
+	return v;
+}
+
+void *pool_iter_next_lock(pool *p)
+{
+	void *v = NULL;
+	pool_lock(p);
+	v = pool_iter_next(p);
+	pool_unlock(p);
+	return v;
+}
+
+bool pool_iter_has_next_lock(pool *p)
+{
+	bool next_exist;
+	pool_lock(p);
+	next_exist = (p->idx < p->num);
+	pool_unlock(p);
+	return next_exist;
+}

src/pool.h

@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _POOL_H_
+#define _POOL_H_
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include <atomic.h>
+
+/* A pool like a stack with an iterator walking from the bottom to the
+ * top. The memory foot print for a pool never shrinks. Thus this is
+ * not suitable for long-term uses. */
+
+struct pool_struct {
+	void **array;
+	size_t len; /* length of array */
+	size_t num; /* number of items in the array */
+	size_t idx; /* index used dy iter */
+	lock lock;
+};
+
+typedef struct pool_struct pool;
+
+/* allocate a new pool */
+pool *pool_new(void);
+
+/* func type applied to each item in a pool */
+typedef void (*pool_map_f)(void *v);
+
+/* apply f, which free an item, to all items and set num to 0 */
+void pool_zeroize(pool *p, pool_map_f f);
+
+/* free pool->array and pool */
+void pool_free(pool *p);
+
+/* free pool->array and pool after applying f to all items in p->array */
+void pool_destroy(pool *p, pool_map_f f);
+
+#define pool_lock(p) LOCK_ACQUIRE(&(p->lock))
+#define pool_unlock(p) LOCK_RELEASE()
+
+/*
+ * pool_push() pushes *v to pool *p. pool_push_lock() does this while
+ * locking *p.
+ */
+int pool_push(pool *p, void *v);
+int pool_push_lock(pool *p, void *v);
+
+/*
+ * pool_pop() pops the last *v pushed to *p. pool_pop_lock() does this
+ * while locking *p.
+ */
+void *pool_pop(pool *p);
+void *pool_pop_lock(pool *p);
+
+/* pool_get() returns value indexed by idx */
+void *pool_get(pool *p, unsigned int idx);
+
+#define pool_size(p) ((p)->num)
+#define pool_is_empty(p) (pool_size(p) == 0)
+
+/*
+ * pool->idx indicates next *v in an iteration. This has two
+ * use-cases.
+ *
+ * (1) A simple list: just a single thread has a pool, and the thread
+ * can call pool_iter_for_each() for the pool (not thread safe).
+ *
+ * (2) A thread-safe queue: one thread initializes the iterator for a
+ * pool by pool_iter_init(). Then, multiple threads get a next *v
+ * concurrently by pool_iter_next_lock(), which means dequeuing. At
+ * this time, other thread can add new *v by pool_push_lock(), which
+ * means enqueuing. During this, other threads must not intercept the
+ * pool by pool_iter_* functions.
+ */
+
+#define pool_iter_init(p) (p->idx = 0)
+void *pool_iter_next(pool *p);
+void *pool_iter_next_lock(pool *p);
+
+/* pool_iter_has_next_lock() returns true if pool_iter_next(_lock)
+ * function will retrun a next value, otherwise false, which means
+ * there is no more values in this iteration. */
+bool pool_iter_has_next_lock(pool *p);
+
+#define pool_iter_for_each(p, v) \
+	pool_iter_init(p);       \
+	for (v = pool_iter_next(p); v != NULL; v = pool_iter_next(p))
+
+#define pool_for_each(p, v, idx) \
+	idx = 0;                 \
+	for (v = pool_get(p, idx); v != NULL; v = pool_get(p, ++idx))
+
+#endif /* _POOL_H_ */

src/print.c

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+
+#include <print.h>
+
+/* message print functions */
+static int __print_severity = MSCP_SEVERITY_WARN;
+
+void set_print_severity(int serverity)
+{
+	if (serverity < 0)
+		__print_severity = -1; /* no print */
+	__print_severity = serverity;
+}
+
+int get_print_severity()
+{
+	return __print_severity;
+}

src/print.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _PRINT_H_
+#define _PRINT_H_
+
+#include <libgen.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <mscp.h>
+
+/* message print. printed messages are passed to application via msg_fd */
+void set_print_severity(int severity);
+int get_print_severity();
+
+#define __print(fp, severity, fmt, ...)                                  \
+	do {                                                             \
+		if (severity <= get_print_severity()) {                  \
+			fprintf(fp, "\r\033[K" fmt "\n", ##__VA_ARGS__); \
+			fflush(fp);                                      \
+		}                                                        \
+	} while (0)
+
+#define pr_err(fmt, ...) __print(stderr, MSCP_SEVERITY_ERR, fmt, ##__VA_ARGS__)
+#define pr_warn(fmt, ...) __print(stderr, MSCP_SEVERITY_WARN, fmt, ##__VA_ARGS__)
+#define pr_notice(fmt, ...) __print(stdout, MSCP_SEVERITY_NOTICE, fmt, ##__VA_ARGS__)
+#define pr_info(fmt, ...) __print(stdout, MSCP_SEVERITY_INFO, fmt, ##__VA_ARGS__)
+#define pr_debug(fmt, ...) __print(stdout, MSCP_SEVERITY_DEBUG, fmt, ##__VA_ARGS__)
+
+#endif /* _PRINT_H_ */

src/pymscp.c

@@ -1,488 +0,0 @@
-#define PY_SSIZE_T_CLEAN
-#include <Python.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <mscp.h>
-
-/*
- * This is a wrapper for python binding of libmscp. setup.py builds
- * pymscp.c after libmscp was built, and setup.py installs pymscp
- * modlue and mscp python module (mscp/mscp.py), which is a warpper
- * for pymscp.
- */
-
-#define MAX_MSCP_INSTS	64
-
-/* XXX: cut corners */
-struct instance {
-	struct mscp_opts mo;
-	struct mscp_ssh_opts so;
-	struct mscp *m;
-};
-
-struct instance *insts[MAX_MSCP_INSTS];
-
-static int add_instance(struct instance *i)
-{
-	int n;
-	for (n = 0; n < MAX_MSCP_INSTS; n++) {
-		if (insts[n] == NULL) {
-			insts[n] = i;
-			return 0;
-		}
-	}
-
-	return -1; /* full of mscp instances */
-}
-
-static struct instance *get_instance(unsigned long long addr)
-{
-	int n;
-	for (n = 0; n < MAX_MSCP_INSTS; n++) {
-		if (insts[n] == (void *)addr)
-			return insts[n];
-	}
-
-	return NULL;
-}
-
-static struct mscp *get_mscp(unsigned long long addr)
-{
-	struct instance *i = get_instance(addr);
-
-	if (!i)
-		return NULL;
-	return i->m;
-}
-
-static int release_instance(struct instance *i)
-{
-	int n;
-	for (n = 0; n < MAX_MSCP_INSTS; n++) {
-		if (insts[n] == i) {
-			insts[n] = NULL;
-			return 0;
-		}
-	}
-
-	free(i);
-
-	return -1;
-}
-
-
-/* wrapper functions */
-
-static PyObject *wrap_mscp_init(PyObject *self, PyObject *args, PyObject *kw)
-{
-	/*
-	 * Initialize struct mscp with options.  wrap_mscp_init
-	 * receives all the arguments with keywords.
-	 */
-
-	char *remote;
-	char *keywords[] = {
-		"remote",	/* const char * */
-		"direction",	/* int, MSCP_DIRECTION_L2R or MSCP_DIRECTION_R2L */
-
-		/* mscp_opts */
-		"nr_threads", 	/* int */
-		"nr_ahead",	/* int */
-
-		"min_chunk_sz",	/* unsigned long */
-		"max_chunk_sz",	/* unsigned long */
-		"buf_sz",	/* unsigned long */
-
-		"coremask",	/* const char * */
-
-		"max_startups",	/* int */
-		"severity",	/* int, MSCP_SERVERITY_* */
-		"msg_fd",	/* int */
-
-		/*  mscp_ssh_opts */
-		"login_name",	/* const char * */
-		"port",		/* const char * */
-		"identity",	/* const char * */
-
-		"cipher",	/* const char * */
-		"hmac",		/* const char * */
-		"compress",	/* const char * */
-		"password",	/* const char * */
-		"passphrase",	/* const char * */
-
-		"debug_level",	/* int */
-		"no_hostkey_check",	/* bool */
-		"enable_nagle",		/* bool */
-		NULL,
-	};
-	const char *fmt = "si" "|" "ii" "kkk" "s" "iii" "sss" "sssss" "ipp";
-	char *coremask = NULL;
-	char *login_name = NULL, *port = NULL, *identity = NULL;
-	char *cipher = NULL, *hmac = NULL, *compress = NULL;
-	char *password = NULL, *passphrase = NULL;
-
-	struct instance *i;
-	int direction;
-	int ret;
-
-	i = malloc(sizeof(*i));
-	if (!i) {
-		PyErr_Format(PyExc_RuntimeError, strerror(errno));
-		return NULL;
-	}
-
-	memset(i, 0, sizeof(*i));
-	
-	ret = PyArg_ParseTupleAndKeywords(args, kw, fmt, keywords,
-					  &remote,
-					  &direction,
-					  &i->mo.nr_threads,
-					  &i->mo.nr_ahead,
-					  &i->mo.min_chunk_sz,
-					  &i->mo.max_chunk_sz,
-					  &i->mo.buf_sz,
-					  &coremask,
-					  &i->mo.max_startups,
-					  &i->mo.severity,
-					  &i->mo.msg_fd,
-					  &login_name,
-					  &port,
-					  &identity,
-					  &cipher,
-					  &hmac,
-					  &compress,
-					  &password,
-					  &passphrase,
-					  &i->so.debug_level,
-					  &i->so.no_hostkey_check,
-					  &i->so.enable_nagle);
-		
-	if (!ret)
-		return NULL;
-
-	if (coremask)
-		strncpy(i->mo.coremask, coremask, MSCP_MAX_COREMASK_STR - 1);
-	if (login_name)
-		strncpy(i->so.login_name, login_name, MSCP_SSH_MAX_LOGIN_NAME - 1);
-	if (port)
-		strncpy(i->so.port, port, MSCP_SSH_MAX_PORT_STR - 1);
-	if (identity)
-		strncpy(i->so.identity, identity, MSCP_SSH_MAX_IDENTITY_PATH - 1);
-	if (cipher)
-		strncpy(i->so.cipher, cipher, MSCP_SSH_MAX_CIPHER_STR - 1);
-	if (hmac)
-		strncpy(i->so.hmac, hmac, MSCP_SSH_MAX_HMAC_STR - 1);
-	if (compress)
-		strncpy(i->so.compress, compress, MSCP_SSH_MAX_COMP_STR - 1);
-	if (password)
-		strncpy(i->so.password, password, MSCP_SSH_MAX_PASSWORD - 1);
-	if (passphrase)
-		strncpy(i->so.passphrase, passphrase, MSCP_SSH_MAX_PASSPHRASE - 1);
-
-	i->m = mscp_init(remote, direction, &i->mo, &i->so);
-	if (!i->m) {
-		PyErr_Format(PyExc_RuntimeError, "%s", mscp_get_error());
-		free(i);
-		return NULL;
-	}
-
-	if (add_instance(i) < 0) {
-		PyErr_Format(PyExc_RuntimeError, "too many mscp isntances");
-		mscp_free(i->m);
-		free(i);
-		return NULL;
-	}
-
-	return Py_BuildValue("K", (unsigned long long)i);
-}
-
-static PyObject *wrap_mscp_connect(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_connect(m) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_add_src_path(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", "src_path", NULL };
-	unsigned long long addr;
-	char *src_path;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "Ks", keywords, &addr, &src_path))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_add_src_path(m, src_path) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_set_dst_path(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", "dst_path", NULL };
-	unsigned long long addr;
-	char *dst_path;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "Ks", keywords, &addr, &dst_path))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_set_dst_path(m, dst_path) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_scan(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_scan(m) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_start(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_start(m) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_stop(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	mscp_stop(m);
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_join(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	if (mscp_join(m) < 0) {
-		PyErr_Format(PyExc_RuntimeError, mscp_get_error());
-		return NULL;
-	}
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_get_stats(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp_stats s;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	mscp_get_stats(m, &s);
-
-	return Py_BuildValue("KKd", s.total, s.done, s.finished);
-}
-
-static PyObject *wrap_mscp_cleanup(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct mscp *m;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	m = get_mscp(addr);
-	if (!m) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	mscp_cleanup(m);
-
-	return Py_BuildValue("");
-}
-
-static PyObject *wrap_mscp_free(PyObject *self, PyObject *args, PyObject *kw)
-{
-	char *keywords[] = { "m", NULL };
-	unsigned long long addr;
-	struct instance *i;
-
-	if (!PyArg_ParseTupleAndKeywords(args, kw, "K", keywords, &addr))
-		return NULL;
-
-	i = get_instance(addr);
-	if (!i) {
-		PyErr_Format(PyExc_RuntimeError, "invalid mscp instance address");
-		return NULL;
-	}
-
-	mscp_free(i->m);
-	release_instance(i);
-
-	return Py_BuildValue("");
-}
-
-static PyMethodDef pymscpMethods[] = {
-	{
-		"mscp_init", (PyCFunction)wrap_mscp_init,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_connect", (PyCFunction)wrap_mscp_connect,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_add_src_path", (PyCFunction)wrap_mscp_add_src_path,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_set_dst_path", (PyCFunction)wrap_mscp_set_dst_path,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_scan", (PyCFunction)wrap_mscp_scan,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_start", (PyCFunction)wrap_mscp_start,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_stop", (PyCFunction)wrap_mscp_stop,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_join", (PyCFunction)wrap_mscp_join,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_get_stats", (PyCFunction)wrap_mscp_get_stats,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_cleanup", (PyCFunction)wrap_mscp_cleanup,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{
-		"mscp_free", (PyCFunction)wrap_mscp_free,
-		METH_VARARGS | METH_KEYWORDS, NULL
-	},
-	{ NULL, NULL, 0, NULL },
-};
-
-static PyModuleDef pymscpModule = {
-	PyModuleDef_HEAD_INIT, "pymscp", NULL, -1, pymscpMethods,
-};
-
-PyMODINIT_FUNC PyInit_pymscp(void) {
-	PyObject *mod = PyModule_Create(&pymscpModule);
-
-	PyModule_AddIntConstant(mod, "LOCAL2REMOTE",	MSCP_DIRECTION_L2R);
-	PyModule_AddIntConstant(mod, "REMOTE2LOCAL",	MSCP_DIRECTION_R2L);
-	PyModule_AddIntConstant(mod, "SEVERITY_NONE",	MSCP_SEVERITY_NONE);
-	PyModule_AddIntConstant(mod, "SEVERITY_ERR",	MSCP_SEVERITY_ERR);
-	PyModule_AddIntConstant(mod, "SEVERITY_WARN",	MSCP_SEVERITY_WARN);
-	PyModule_AddIntConstant(mod, "SEVERITY_NOTICE",	MSCP_SEVERITY_NOTICE);
-	PyModule_AddIntConstant(mod, "SEVERITY_INFO",	MSCP_SEVERITY_INFO);
-	PyModule_AddIntConstant(mod, "SEVERITY_DEBUG",	MSCP_SEVERITY_DEBUG);
-
-	return mod;
-}
-

src/rename-logic.py

@@ -1,48 +0,0 @@
-#!/usr/bin/env python3
-
-from os.path import dirname, basename, isfile, isdir, exists
-from os import listdir
-import sys
-
-"""
-
-This file simply implements the src_path to dst_path conversion logic
-just for test. file_fill() and file_fill_recursive() in file.c
-implements this logic.
-
-"""
-
-
-def recursive(src, rel_path, dst, dst_should_dir, replace_dir_name):
-    
-    if isfile(src):
-        if dst_should_dir:
-            print("{} => {}/{}{}".format(src, dst, rel_path, basename(src)))
-        else:
-            print("{} => {}{}".format(src, rel_path, dst))
-        return
-        
-    # src is directory
-    for f in listdir(src):
-        next_src = "{}/{}".format(src, f)
-        if replace_dir_name and dst_should_dir:
-            next_rel_path = ""
-        else:
-            next_rel_path = "{}{}/".format(rel_path, basename(src))
-        recursive(next_src, next_rel_path, dst, dst_should_dir, False)
-
-
-def fill_dst(srclist, dst):
-    dst_must_dir = len(srclist) > 1
-    for src in srclist:
-        dst_should_dir = isdir(src) | isdir(dst)
-        replace_dir_name = not isdir(dst)
-        recursive(src, "", dst, dst_should_dir | dst_must_dir, replace_dir_name)
-
-
-def main():
-    if (len(sys.argv) < 2):
-        print("usage: {} source ... target".format(sys.argv[0]))
-    fill_dst(sys.argv[1:len(sys.argv) - 1], sys.argv[len(sys.argv) - 1])
-
-main()

src/ssh.c

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
@@ -6,61 +7,68 @@
 #include "libssh/callbacks.h"
 
 #include <ssh.h>
-#include <util.h>
-#include <message.h>
+#include <mscp.h>
+#include <strerrno.h>
 
 static int ssh_verify_known_hosts(ssh_session session);
 
-
-#define is_specified(s) (strlen(s) > 0)
-
 static int ssh_set_opts(ssh_session ssh, struct mscp_ssh_opts *opts)
 {
 	ssh_set_log_level(opts->debug_level);
 
-	if (is_specified(opts->login_name) &&
+	if (opts->login_name &&
 	    ssh_options_set(ssh, SSH_OPTIONS_USER, opts->login_name) < 0) {
-		mscp_set_error("failed to set login name");
+		priv_set_errv("failed to set login name");
 		return -1;
 	}
 
-	if (is_specified(opts->port) &&
-	    ssh_options_set(ssh, SSH_OPTIONS_PORT_STR, opts->port) < 0) {
-		mscp_set_error("failed to set port number");
+	if (opts->port && ssh_options_set(ssh, SSH_OPTIONS_PORT_STR, opts->port) < 0) {
+		priv_set_errv("failed to set port number");
 		return -1;
 	}
 
-	if (is_specified(opts->identity) &&
+	if (opts->ai_family &&
+	    ssh_options_set(ssh, SSH_OPTIONS_AI_FAMILY, &opts->ai_family) < 0) {
+		priv_set_errv("failed to set address family");
+		return -1;
+	}
+
+	if (opts->identity &&
 	    ssh_options_set(ssh, SSH_OPTIONS_IDENTITY, opts->identity) < 0) {
-		mscp_set_error("failed to set identity");
+		priv_set_errv("failed to set identity");
 		return -1;
 	}
 
-	if (is_specified(opts->cipher)) {
+	if (opts->cipher) {
 		if (ssh_options_set(ssh, SSH_OPTIONS_CIPHERS_C_S, opts->cipher) < 0) {
-			mscp_set_error("failed to set cipher for client to server");
+			priv_set_errv("failed to set cipher for client to server");
 			return -1;
 		}
 		if (ssh_options_set(ssh, SSH_OPTIONS_CIPHERS_S_C, opts->cipher) < 0) {
-			mscp_set_error("failed to set cipher for server to client");
+			priv_set_errv("failed to set cipher for server to client");
 			return -1;
 		}
 	}
 
-	if (is_specified(opts->hmac)) {
+	if (opts->hmac) {
 		if (ssh_options_set(ssh, SSH_OPTIONS_HMAC_C_S, opts->hmac) < 0) {
-			mscp_set_error("failed to set hmac for client to server");
+			priv_set_errv("failed to set hmac for client to server");
 			return -1;
 		}
 		if (ssh_options_set(ssh, SSH_OPTIONS_HMAC_S_C, opts->hmac) < 0) {
-			mscp_set_error("failed to set hmac for server to client");
+			priv_set_errv("failed to set hmac for server to client");
 			return -1;
 		}
 	}
 
-	if (is_specified(opts->compress) &&
+	if (opts->compress &&
 	    ssh_options_set(ssh, SSH_OPTIONS_COMPRESSION, opts->compress) < 0) {
-		mscp_set_error("failed to enable ssh compression");
+		priv_set_errv("failed to enable ssh compression");
+		return -1;
+	}
+
+	if (opts->ccalgo && ssh_options_set(ssh, SSH_OPTIONS_CCALGO, opts->ccalgo) < 0) {
+		priv_set_errv("failed to set cclago");
 		return -1;
 	}
 
@@ -68,11 +76,16 @@ static int ssh_set_opts(ssh_session ssh, struct mscp_ssh_opts *opts)
 	if (!opts->enable_nagle) {
 		int v = 1;
 		if (ssh_options_set(ssh, SSH_OPTIONS_NODELAY, &v) < 0) {
-			mscp_set_error("failed to set TCP_NODELAY");
+			priv_set_errv("failed to set TCP_NODELAY");
 			return -1;
 		}
 	}
 
+	if (opts->config && ssh_options_parse_config(ssh, opts->config) < 0) {
+		priv_set_errv("failed to parse ssh_config: %s", opts->config);
+		return -1;
+	}
+
 	return 0;
 }
 
@@ -93,15 +106,20 @@ static int ssh_authenticate(ssh_session ssh, struct mscp_ssh_opts *opts)
 		return 0;
 
 	if (auth_bit_mask & SSH_AUTH_METHOD_PUBLICKEY) {
-		char *p = is_specified(opts->passphrase) ? opts->passphrase : NULL;
+		char *p = opts->passphrase ? opts->passphrase : NULL;
 		if (ssh_userauth_publickey_auto(ssh, NULL, p) == SSH_AUTH_SUCCESS)
 			return 0;
 	}
 
 	if (auth_bit_mask & SSH_AUTH_METHOD_PASSWORD) {
-		if (!is_specified(opts->password)) {
-			if (ssh_getpass("Password: ", opts->password,
-					MSCP_SSH_MAX_PASSWORD, 0, 0) < 0) {
+		if (!opts->password) {
+			char buf[128] = {};
+			if (ssh_getpass("Password: ", buf, sizeof(buf), 0, 0) < 0) {
+				priv_set_errv("ssh_getpass failed");
+				return -1;
+			}
+			if (!(opts->password = strndup(buf, sizeof(buf)))) {
+				priv_set_errv("strndup: %s", strerrno());
 				return -1;
 			}
 		}
@@ -123,15 +141,21 @@ static int ssh_cache_passphrase(const char *prompt, char *buf, size_t len, int e
 	 * second time or after because cached passphrase is passed
 	 * to ssh_userauth_publickey_auto(). */
 
+	/* ToDo: use
+	 * ssh_userauth_publickey_auto_get_current_identity() to print
+	 * id for which we ask passphrase */
+
 	if (ssh_getpass("Passphrase: ", buf, len, echo, verify) < 0)
 		return -1;
 
 	/* cache the passphrase */
-	if (strlen(buf) > MSCP_SSH_MAX_PASSPHRASE - 1)  {
-		pr_warn("sorry, passphrase is too long to cache...\n");
-		return 0;
+	if (opts->passphrase)
+		free(opts->passphrase);
+
+	if (!(opts->passphrase = strndup(buf, len))) {
+		priv_set_errv("strndup: %s", strerrno());
+		return -1;
 	}
-	strncpy(opts->passphrase, buf, MSCP_SSH_MAX_PASSPHRASE);
 
 	return 0;
 }
@@ -149,25 +173,26 @@ static ssh_session ssh_init_session(const char *sshdst, struct mscp_ssh_opts *op
 	cb.userdata = opts;
 	ssh_set_callbacks(ssh, &cb);
 
-	if (ssh_set_opts(ssh, opts) != 0)
-		goto free_out;
-
 	if (ssh_options_set(ssh, SSH_OPTIONS_HOST, sshdst) != SSH_OK) {
-		mscp_set_error("failed to set destination host");
+		priv_set_errv("failed to set destination host");
 		goto free_out;
 	}
 
+	if (ssh_set_opts(ssh, opts) != 0)
+		goto free_out;
+
 	if (ssh_connect(ssh) != SSH_OK) {
-		mscp_set_error("failed to connect ssh server: %s", ssh_get_error(ssh));
+		priv_set_errv("failed to connect ssh server: %s", ssh_get_error(ssh));
 		goto free_out;
 	}
 
 	if (ssh_authenticate(ssh, opts) != 0) {
-		mscp_set_error("authentication failed: %s", ssh_get_error(ssh));
+		priv_set_errv("authentication failed: %s", ssh_get_error(ssh));
 		goto disconnect_out;
 	}
 
 	if (!opts->no_hostkey_check && ssh_verify_known_hosts(ssh) != 0) {
+		priv_set_errv("ssh_veriy_known_hosts failed");
 		goto disconnect_out;
 	}
 
@@ -185,20 +210,18 @@ sftp_session ssh_init_sftp_session(const char *sshdst, struct mscp_ssh_opts *opt
 	sftp_session sftp;
 	ssh_session ssh = ssh_init_session(sshdst, opts);
 
-	if (!ssh) {
+	if (!ssh)
 		return NULL;
-	}
 
 	sftp = sftp_new(ssh);
 	if (!sftp) {
-		mscp_set_error("failed to allocate sftp session: %s",
-			       ssh_get_error(ssh));
+		priv_set_errv("failed to allocate sftp session: %s", ssh_get_error(ssh));
 		goto err_out;
 	}
 
 	if (sftp_init(sftp) != SSH_OK) {
-		mscp_set_error("failed to initialize sftp session: err code %d",
-			       sftp_get_error(sftp));
+		priv_set_errv("failed to initialize sftp session: err code %d",
+			      sftp_get_error(sftp));
 		goto err_out;
 	}
 
@@ -209,7 +232,6 @@ err_out:
 	return NULL;
 }
 
-
 /* copied from https://api.libssh.org/stable/libssh_tutor_guided_tour.html*/
 static int ssh_verify_known_hosts(ssh_session session)
 {
@@ -228,10 +250,7 @@ static int ssh_verify_known_hosts(ssh_session session)
 		return -1;
 	}
 
-	rc = ssh_get_publickey_hash(srv_pubkey,
-				    SSH_PUBLICKEY_HASH_SHA1,
-				    &hash,
-				    &hlen);
+	rc = ssh_get_publickey_hash(srv_pubkey, SSH_PUBLICKEY_HASH_SHA1, &hash, &hlen);
 	ssh_key_free(srv_pubkey);
 	if (rc < 0) {
 		return -1;
@@ -252,8 +271,9 @@ static int ssh_verify_known_hosts(ssh_session session)
 		return -1;
 	case SSH_KNOWN_HOSTS_OTHER:
 		fprintf(stderr, "The host key for this server was not found but an other"
-			"type of key exists.\n");
-		fprintf(stderr, "An attacker might change the default server key to"
+				"type of key exists.\n");
+		fprintf(stderr,
+			"An attacker might change the default server key to"
 			"confuse your client into thinking the key does not exist\n");
 		ssh_clean_pubkey_hash(&hash);
 
@@ -261,7 +281,7 @@ static int ssh_verify_known_hosts(ssh_session session)
 	case SSH_KNOWN_HOSTS_NOT_FOUND:
 		fprintf(stderr, "Could not find known host file.\n");
 		fprintf(stderr, "If you accept the host key here, the file will be"
-			"automatically created.\n");
+				"automatically created.\n");
 
 		/* FALL THROUGH to SSH_SERVER_NOT_KNOWN behavior */
 
@@ -284,13 +304,13 @@ static int ssh_verify_known_hosts(ssh_session session)
 
 		rc = ssh_session_update_known_hosts(session);
 		if (rc < 0) {
-			fprintf(stderr, "Error %s\n", strerror(errno));
+			priv_set_errv("%s", ssh_get_error(session));
 			return -1;
 		}
 
 		break;
 	case SSH_KNOWN_HOSTS_ERROR:
-		fprintf(stderr, "Error %s", ssh_get_error(session));
+		fprintf(stderr, "known hosts error: %s", ssh_get_error(session));
 		ssh_clean_pubkey_hash(&hash);
 		return -1;
 	}

src/ssh.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
 #ifndef _SSH_H_
 #define _SSH_H_
 

src/strerrno.c

@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <strerrno.h>
+
+#define STRERRNO_TLS_BUFSIZ 128
+__thread char tls_strerrno_buf[STRERRNO_TLS_BUFSIZ];
+
+const char *strerrno(void)
+{
+	snprintf(tls_strerrno_buf, sizeof(tls_strerrno_buf), "%s", "strerror_r error");
+	strerror_r(errno, tls_strerrno_buf, sizeof(tls_strerrno_buf));
+	return tls_strerrno_buf;
+}
+
+#define PRIV_ERR_BUFSIZ (1 << 12)
+__thread char priv_err_buf[PRIV_ERR_BUFSIZ], internal[PRIV_ERR_BUFSIZ];
+
+void priv_set_err(const char *fmt, ...)
+{
+	va_list va;
+	memset(internal, 0, sizeof(internal));
+	va_start(va, fmt);
+	vsnprintf(internal, sizeof(internal), fmt, va);
+	va_end(va);
+	snprintf(priv_err_buf, sizeof(priv_err_buf), "%s", internal);
+}
+
+const char *priv_get_err()
+{
+	return priv_err_buf;
+}

src/strerrno.h

@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#ifndef _STRERRNO_
+#define _STRERRNO_
+
+#include <libgen.h> /* basename() */
+
+/**
+ * strerrno() returns error message string corresponding to errno.
+ * strerrno() is thread safe.
+ */
+const char *strerrno(void);
+
+/**
+ * priv_set_err() sets an error message into a thread-local private
+ * buffer. This error message can be accessed via priv_get_err().
+ *
+ * The top-level function in a thread should print errors using
+ * priv_get_err(), while lower-level functions should set error
+ * messages using priv_set_err().
+ */
+void priv_set_err(const char *fmt, ...);
+
+/**
+ * priv_set_errv(), a wrapper for priv_set_err(), just adds filename,
+ * line, and function name to the error message.
+ */
+#define priv_set_errv(fmt, ...)                                                      \
+	priv_set_err("[%s:%d:%s] " fmt "\0", basename(__FILE__), __LINE__, __func__, \
+		     ##__VA_ARGS__)
+
+/**
+ * priv_get_err() gets the error message sotred in the thread-local private buffer.
+ */
+const char *priv_get_err();
+
+#endif /* _STRERRNO_ */

src/util.h

@@ -1,38 +0,0 @@
-#ifndef _UTIL_H_
-#define _UTIL_H_
-
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <libgen.h>
-
-#define likely(x)       __builtin_expect(!!(x), 1)
-#define unlikely(x)     __builtin_expect(!!(x), 0)
-
-
-#define pr(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
-
-#define pr_info(fmt, ...) fprintf(stderr, "INFO:%s(): " fmt,    \
-				  __func__, ##__VA_ARGS__)
-
-#define pr_warn(fmt, ...) fprintf(stderr, "\x1b[1m\x1b[33m"	\
-				  "WARN:%s():\x1b[0m " fmt,	\
-				  __func__, ##__VA_ARGS__)
-
-#define pr_err(fmt, ...) fprintf(stderr, "\x1b[1m\x1b[31m"	\
-				 "ERR:%s:%d:%s():\x1b[0m " fmt,	\
-				 basename(__FILE__), __LINE__, __func__, ##__VA_ARGS__)
-
-#ifdef DEBUG
-#define pr_debug(fmt, ...) fprintf(stderr, "\x1b[1m\x1b[33m"    \
-				   "DEBUG:%s():\x1b[0m " fmt,	\
-				   __func__, ##__VA_ARGS__);
-#else
-#define pr_debug(fmt, ...)
-#endif
-
-
-#define min(a, b) (((a) > (b)) ? (b) : (a))
-#define max(a, b) (((a) > (b)) ? (a) : (b))
-
-#endif /* _UTIL_H_ */

test/test_e2e.py

@@ -3,19 +3,30 @@
 test_e2e.py: End-to-End test for mscp executable.
 """
 
+import platform
 import pytest
+import getpass
+import time
 import os
+import shutil
 
-from subprocess import check_call, CalledProcessError, PIPE
+from subprocess import check_call, CalledProcessError
 from util import File, check_same_md5sum
 
 
-def run2ok(args):
-    check_call(list(map(str, args)))
+def run2ok(args, env = None):
+    cmd = list(map(str, args))
+    print("cmd: {}".format(" ".join(cmd)))
+    check_call(cmd, env = env)
 
-def run2ng(args):
+def run2ng(args, env = None, timeout = None):
+    if timeout:
+        args = ["timeout", "-s", "INT", timeout] + args
+    cmd = list(map(str, args))
+    print("cmd: {}".format(" ".join(cmd)))
     with pytest.raises(CalledProcessError) as e:
-        check_call(list(map(str, args)))
+        check_call(cmd, env = env)
+
 
 
 """ usage test """
@@ -56,7 +67,7 @@ param_single_copy = [
 @pytest.mark.parametrize("src, dst", param_single_copy)
 def test_single_copy(mscp, src_prefix, dst_prefix, src, dst):
     src.make()
-    run2ok([mscp, "-H", src_prefix + src.path, dst_prefix + dst.path])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src.path, dst_prefix + dst.path])
     assert check_same_md5sum(src, dst)
     src.cleanup()
     dst.cleanup()
@@ -65,7 +76,7 @@ def test_single_copy(mscp, src_prefix, dst_prefix, src, dst):
 def test_failed_to_copy_nonexistent_file(mscp, src_prefix, dst_prefix):
     src = "nonexistent_src"
     dst = "nonexistent_dst"
-    run2ng([mscp, "-H", src_prefix + src, dst_prefix + dst])
+    run2ng([mscp, "-H", "-vvv", src_prefix + src, dst_prefix + dst])
 
 param_double_copy = [
     (File("src1", size = 1024 * 1024), File("src2", size = 1024 * 1024),
@@ -77,7 +88,7 @@ param_double_copy = [
 def test_double_copy(mscp, src_prefix, dst_prefix, s1, s2, d1, d2):
     s1.make()
     s2.make()
-    run2ok([mscp, "-H", src_prefix + s1.path, src_prefix + s2.path, dst_prefix + "dst"])
+    run2ok([mscp, "-H", "-vvv", src_prefix + s1.path, src_prefix + s2.path, dst_prefix + "dst"])
     assert check_same_md5sum(s1, d1)
     assert check_same_md5sum(s2, d2)
     s1.cleanup()
@@ -85,6 +96,47 @@ def test_double_copy(mscp, src_prefix, dst_prefix, s1, s2, d1, d2):
     d1.cleanup()
     d2.cleanup()
 
+
+remote_v6_prefix = "[::1]:{}/".format(os.getcwd())
+param_remote_v6_prefix = [
+    ("", remote_v6_prefix), (remote_v6_prefix, "")
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_v6_prefix)
+@pytest.mark.parametrize("s1, s2, d1, d2", param_double_copy)
+def test_double_copy_with_ipv6_notation(mscp, src_prefix, dst_prefix, s1, s2, d1, d2):
+    s1.make()
+    s2.make()
+    run2ok([mscp, "-H", "-vvv",
+            src_prefix + s1.path, src_prefix + s2.path, dst_prefix + "dst"])
+    assert check_same_md5sum(s1, d1)
+    assert check_same_md5sum(s2, d2)
+    s1.cleanup()
+    s2.cleanup()
+    d1.cleanup()
+    d2.cleanup()
+
+
+remote_user_v6_prefix = "{}@[::1]:{}/".format(getpass.getuser(), os.getcwd())
+param_remote_user_v6_prefix = [
+    ("", remote_user_v6_prefix), (remote_user_v6_prefix, "")
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_user_v6_prefix)
+@pytest.mark.parametrize("s1, s2, d1, d2", param_double_copy)
+def test_double_copy_with_user_and_ipv6_notation(mscp, src_prefix, dst_prefix,
+                                                 s1, s2, d1, d2):
+    s1.make()
+    s2.make()
+    run2ok([mscp, "-H", "-vvv",
+            src_prefix + s1.path, src_prefix + s2.path, dst_prefix + "dst"])
+    assert check_same_md5sum(s1, d1)
+    assert check_same_md5sum(s2, d2)
+    s1.cleanup()
+    s2.cleanup()
+    d1.cleanup()
+    d2.cleanup()
+
+
+
 param_dir_copy = [
     ( "src_dir", "dst_dir",
         [ File("src_dir/t1", size = 64),
@@ -114,11 +166,11 @@ def test_dir_copy(mscp, src_prefix, dst_prefix, src_dir, dst_dir, src, dst, twic
     for f in src:
         f.make()
 
-    run2ok([mscp, "-H", src_prefix + src_dir, dst_prefix + dst_dir])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src_dir, dst_prefix + dst_dir])
     for sf, df in zip(src, dst):
         assert check_same_md5sum(sf, df)
 
-    run2ok([mscp, "-H", src_prefix + src_dir, dst_prefix + dst_dir])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src_dir, dst_prefix + dst_dir])
     for sf, df in zip(src, twice):
         assert check_same_md5sum(sf, df)
 
@@ -127,35 +179,105 @@ def test_dir_copy(mscp, src_prefix, dst_prefix, src_dir, dst_dir, src, dst, twic
         df.cleanup()
         tf.cleanup()
 
+
+param_dir_copy_single = [
+    ("src_dir", "dst_dir",
+     File("src_dir/t1", size = 1024 * 1024),
+     File("dst_dir/src_dir/t1"),
+     )
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("src_dir, dst_dir, src, dst", param_dir_copy_single)
+def test_dir_copy_single(mscp, src_prefix, dst_prefix, src_dir, dst_dir, src, dst):
+    src.make()
+    os.mkdir(dst_dir)
+    run2ok([mscp, "-H", "-vvv", src_prefix + src_dir, dst_prefix + dst_dir])
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
 def test_override_single_file(mscp, src_prefix, dst_prefix):
     src = File("src", size = 128).make()
     dst = File("dst", size = 128).make()
     assert not check_same_md5sum(src, dst)
 
-    run2ok([mscp, "-H", src_prefix + src.path, dst_prefix + dst.path])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src.path, dst_prefix + dst.path])
     assert check_same_md5sum(src, dst)
 
     src.cleanup()
     dst.cleanup()
 
+absolute_remote_prefix = "localhost:"
+param_absolute_remote_prefix = [
+    ("", absolute_remote_prefix), (absolute_remote_prefix, "")
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_absolute_remote_prefix)
+def test_copy_file_under_root_to_dir(mscp, src_prefix, dst_prefix):
+    src = File("/mscp-test-src", size = 1024).make()
+    dst = File("/tmp/mscp-test-src")
+
+    run2ok([mscp, "-H", "-vvv", src_prefix + src.path,
+            dst_prefix + os.path.dirname(dst.path)])
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup(preserve_dir = True)
+
+
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
 def test_min_chunk(mscp, src_prefix, dst_prefix):
     src = File("src", size = 16 * 1024).make()
     dst = File("dst")
 
-    run2ok([mscp, "-H", "-s", 32768, src_prefix + src.path, dst_prefix + dst.path])
+    run2ok([mscp, "-H", "-vvv", "-s", 32768, src_prefix + src.path, dst_prefix + dst.path])
     assert check_same_md5sum(src, dst)
 
     src.cleanup()
     dst.cleanup()
 
+
+def is_alpine():
+    if os.path.exists("/etc/os-release"):
+        with open("/etc/os-release", "r") as f:
+            for line in f:
+                if line.strip() == "ID=alpine":
+                    return True
+    return False
+
+param_glob_copy = [
+    (
+        "src*", "dstx",
+        [ File("src1"), File("src2"), File("src3") ],
+        [ File("dstx/src1"), File("dstx/src2"), File("dstx/src3") ],
+    ),
+    (
+        "src*", "dstx",
+        [ File("src1/s1"), File("src2/s2"), File("src3/s3") ],
+        [ File("dstx/s1"), File("dstx/s2"), File("dstx/s3") ],
+    )
+]
+
+@pytest.mark.skipif(is_alpine(),
+                    reason = "musl does not implement glob ALTDIRFUNC")
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("src_glob_path, dst_path, srcs, dsts", param_glob_copy)
+def test_glob_src_path(mscp, src_prefix, dst_prefix,
+                       src_glob_path, dst_path, srcs, dsts):
+    for src in srcs:
+        src.make(size = 1024 * 1024)
+
+    run2ok([mscp, "-H", "-vvv", src_prefix + src_glob_path, dst_prefix + dst_path])
+    for src, dst in zip(srcs, dsts):
+        assert check_same_md5sum(src, dst)
+        src.cleanup()
+        dst.cleanup()
+
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
 def test_thread_affinity(mscp, src_prefix, dst_prefix):
     src = File("src", size = 64 * 1024).make()
     dst = File("dst")
 
-    run2ok([mscp, "-H", "-n", 4, "-m", "0x01",
+    run2ok([mscp, "-H", "-vvv", "-n", 4, "-m", "0x01",
             src_prefix + src.path, dst_prefix + dst.path])
     assert check_same_md5sum(src, dst)
 
@@ -167,7 +289,7 @@ def test_cannot_override_file_with_dir(mscp, src_prefix, dst_prefix):
     src = File("src", size = 128).make()
     dst = File("dst").make()
 
-    run2ng([mscp, "-H", src_prefix + src.path, dst_prefix + "dst/src"])
+    run2ng([mscp, "-H", "-vvv", src_prefix + src.path, dst_prefix + "dst/src"])
 
     src.cleanup()
     dst.cleanup()
@@ -176,7 +298,7 @@ def test_cannot_override_file_with_dir(mscp, src_prefix, dst_prefix):
 def test_transfer_zero_bytes(mscp, src_prefix, dst_prefix):
     src = File("src", size = 0).make()
     dst = File("dst")
-    run2ok([mscp, "-H", src_prefix + src.path, dst_prefix + "dst"])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src.path, dst_prefix + "dst"])
     assert os.path.exists("dst")
     src.cleanup()
     dst.cleanup()
@@ -185,18 +307,255 @@ def test_transfer_zero_bytes(mscp, src_prefix, dst_prefix):
 def test_override_dst_having_larger_size(mscp, src_prefix, dst_prefix):
     src = File("src", size = 1024 * 1024).make()
     dst = File("dst", size = 1024 * 1024 * 2).make()
-    run2ok([mscp, "-H", src_prefix + src.path, dst_prefix + "dst"])
+    run2ok([mscp, "-H", "-vvv", src_prefix + src.path, dst_prefix + "dst"])
     assert check_same_md5sum(src, dst)
     src.cleanup()
     dst.cleanup()
 
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_dont_truncate_dst(mscp, src_prefix, dst_prefix):
+    f = File("srcanddst", size = 1024 * 1024 * 128).make()
+    md5_before = f.md5sum()
+    run2ok([mscp, "-H", "-vvv", src_prefix + f.path, dst_prefix + f.path])
+    md5_after = f.md5sum()
+    assert md5_before == md5_after
+    f.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_dont_make_conns_more_than_chunks(mscp, src_prefix, dst_prefix):
+    # copy 100 files with -n 20 -I 1 options. if mscp creates 20 SSH
+    # connections although all files have been copied, it is error.
+    srcs = []
+    dsts = []
+    for n in range(100):
+        srcs.append(File("src/src-{:06d}".format(n), size=1024).make())
+        dsts.append(File("dst/src-{:06d}".format(n)))
+    start = time.time()
+    run2ok([mscp, "-H", "-v", "-n", "20", "-I", "1",
+            src_prefix + "src", dst_prefix + "dst"])
+    end = time.time()
+    for s, d in zip(srcs, dsts):
+        assert check_same_md5sum(s, d)
+    shutil.rmtree("src")
+    shutil.rmtree("dst")
+    assert((end - start) < 10)
+
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("src, dst", param_single_copy)
+def test_set_port_ng(mscp, src_prefix, dst_prefix, src, dst):
+    src.make()
+    run2ng([mscp, "-H", "-vvv", "-P", 21, src_prefix + src.path, dst_prefix + dst.path])
+    src.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("src, dst", param_single_copy)
+def test_set_port_ok(mscp, src_prefix, dst_prefix, src, dst):
+    src.make()
+    run2ok([mscp, "-H", "-vvv", "-P", 8022, src_prefix + src.path, dst_prefix + dst.path])
+    src.cleanup()
+
+def test_v4only(mscp):
+    src = File("src", size = 1024).make()
+    dst = File("dst")
+    dst_prefix = "localhost:{}/".format(os.getcwd())
+    run2ok([mscp, "-H", "-vvv", "-4", src.path, dst_prefix + dst.path])
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+def test_v6only(mscp):
+    src = File("src", size = 1024).make()
+    dst = File("dst")
+    dst_prefix = "ip6-localhost:{}/".format(os.getcwd())
+    run2ok([mscp, "-H", "-vvv", "-6", src.path, dst_prefix + dst.path])
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+def test_v4_to_v6_should_fail(mscp):
+    src = File("src", size = 1024).make()
+    dst = File("dst")
+    dst_prefix = "[::1]:{}/".format(os.getcwd())
+    run2ng([mscp, "-H", "-vvv", "-4", src.path, dst_prefix + dst.path])
+    src.cleanup()
+
+def test_v6_to_v4_should_fail(mscp):
+    src = File("src", size = 1024).make()
+    dst = File("dst")
+    dst_prefix = "127.0.0.1:{}/".format(os.getcwd())
+    run2ng([mscp, "-H", "-vvv", "-6", src.path, dst_prefix + dst.path])
+    src.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_set_conn_interval(mscp, src_prefix, dst_prefix):
+    srcs = []
+    dsts = []
+    for x in range(500):
+        srcs.append(File("src/file{}".format(x), size = 128).make())
+        dsts.append(File("dst/file{}".format(x)))
+    run2ok([mscp, "-H", "-vvv", "-I", 1, src_prefix + "src", dst_prefix + "dst"])
+
+    for src, dst in zip(srcs, dsts):
+        assert check_same_md5sum(src, dst)
+        src.cleanup()
+        dst.cleanup()
+
 compressions = ["yes", "no", "none"]
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
 @pytest.mark.parametrize("compress", compressions)
 def test_compression(mscp, src_prefix, dst_prefix, compress):
     src = File("src", size = 1024 * 1024).make()
     dst = File("dst", size = 1024 * 1024 * 2).make()
-    run2ok([mscp, "-H", "-C", compress, src_prefix + src.path, dst_prefix + "dst"])
+    run2ok([mscp, "-H", "-vvv", "-C", compress, src_prefix + src.path, dst_prefix + "dst"])
     assert check_same_md5sum(src, dst)
     src.cleanup()
     dst.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_ccalgo(mscp, src_prefix, dst_prefix):
+    src = File("src", size = 1024 * 1024).make()
+    dst = File("dst").make()
+    if platform.system() == "Darwin":
+        # Darwin does not support TCP_CONGESTION
+        algo = "cubic"
+        run = run2ng
+    elif platform.system() == "Linux":
+        # Linux supports TCP_CONGESTION
+        with open("/proc/sys/net/ipv4/tcp_allowed_congestion_control", "r") as f:
+            algo = f.read().strip().split().pop()
+        run = run2ok
+    run([mscp, "-H", "-vvv", "-g", algo, src_prefix + src.path, dst_prefix + "dst"])
+
+
+testhost = "mscptestlocalhost"
+testhost_prefix = "{}:{}/".format(testhost, os.getcwd()) # use current dir
+param_testhost_prefix = [
+    ("", testhost_prefix), (testhost_prefix, "")
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_testhost_prefix)
+def test_config_ok(mscp, src_prefix, dst_prefix):
+    config = "/tmp/mscp_test_ssh_config"
+    with open(config, "w") as f:
+        f.write("host {}\n".format(testhost))
+        f.write("    hostname localhost\n")
+
+    src = File("src", size = 1024 * 1024).make()
+    dst = File("dst", size = 1024 * 1024 * 2).make()
+    run2ok([mscp, "-H", "-vvv", "-F", config,
+            src_prefix + src.path, dst_prefix + "dst"])
+
+    os.remove(config)
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_testhost_prefix)
+def test_config_ng(mscp, src_prefix, dst_prefix):
+    config = "/tmp/mscp_test_ssh_config"
+    with open(config, "w") as f:
+        f.write("\n") # use empty ssh_config
+
+    src = File("src", size = 1024 * 1024).make()
+    dst = File("dst", size = 1024 * 1024 * 2).make()
+    run2ng([mscp, "-H", "-vvv", "-F", config,
+            src_prefix + src.path, dst_prefix + "dst"])
+
+    os.remove(config)
+    src.cleanup()
+    dst.cleanup()
+
+# username test assumes that this test runs inside a container, see Dockerfiles
+def test_specify_passphrase_via_env(mscp):
+    src = File(os.getcwd() + "/src", size = 1024).make()
+    dst = File("/home/test/dst")
+    env = os.environ
+    env["MSCP_SSH_AUTH_PASSPHRASE"]  = "keypassphrase"
+    run2ok([mscp, "-H", "-vvv", "-l", "test", "-i", "/home/test/.ssh/id_rsa_test",
+            src.path, "localhost:" + dst.path], env = env)
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+def test_specify_invalid_passphrase_via_env(mscp):
+    src = File(os.getcwd() + "/src", size = 1024).make()
+    dst = File("/home/test/dst")
+    env = os.environ
+    env["MSCP_SSH_AUTH_PASSPHRASE"]  = "invalid-keypassphrase"
+    run2ng([mscp, "-H", "-vvv", "-l", "test", "-i", "/home/test/.ssh/id_rsa_test",
+            src.path, "localhost:" + dst.path], env = env)
+    src.cleanup()
+
+def test_specify_password_via_env(mscp):
+    src = File(os.getcwd() + "/src", size = 1024).make()
+    dst = File("/home/test/dst")
+    env = os.environ
+    env["MSCP_SSH_AUTH_PASSWORD"]  = "userpassword"
+    run2ok([mscp, "-H", "-vvv", "-l", "test",
+            src.path, "localhost:" + dst.path], env = env)
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+def test_specify_invalid_password_via_env(mscp):
+    src = File(os.getcwd() + "/src", size = 1024).make()
+    dst = File("/home/test/dst")
+    env = os.environ
+    env["MSCP_SSH_AUTH_PASSWORD"]  = "invalid-userpassword"
+    run2ng([mscp, "-H", "-vvv", "-l", "test",
+            src.path, "localhost:" + dst.path], env = env)
+    src.cleanup()
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_10k_files(mscp, src_prefix, dst_prefix):
+    srcs = []
+    dsts = []
+    for n in range(10000):
+        srcs.append(File("src/src-{:06d}".format(n), size=1024).make())
+        dsts.append(File("dst/src-{:06d}".format(n)))
+    run2ok([mscp, "-H", "-v", src_prefix + "src", dst_prefix + "dst"])
+    for s, d in zip(srcs, dsts):
+        assert check_same_md5sum(s, d)
+    shutil.rmtree("src")
+    shutil.rmtree("dst")
+
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_checkpoint_dump_and_resume(mscp, src_prefix, dst_prefix):
+    src1 = File("src1", size = 512 * 1024 * 1024).make()
+    src2 = File("src2", size = 512 * 1024 * 1024).make()
+    dst1 = File("dst/src1")
+    dst2 = File("dst/src2")
+    run2ok([mscp, "-H", "-vvv", "-W", "checkpoint", "-D",
+            src_prefix + "src1", src_prefix + "src2", dst_prefix + "dst"])
+    assert os.path.exists("checkpoint")
+
+    run2ok([mscp, "-H", "-vvv", "-R", "checkpoint"])
+    assert check_same_md5sum(src1, dst1)
+    assert check_same_md5sum(src2, dst2)
+    src1.cleanup()
+    src2.cleanup()
+    dst1.cleanup()
+    dst2.cleanup()
+    os.remove("checkpoint")
+
+@pytest.mark.parametrize("timeout", [1,2,3])
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+def test_checkpoint_interrupt_and_resume(mscp, timeout, src_prefix, dst_prefix):
+    src1 = File("src1", size = 1024 * 1024 * 1024).make()
+    src2 = File("src2", size = 1024 * 1024 * 1024).make()
+    dst1 = File("dst/src1")
+    dst2 = File("dst/src2")
+    run2ng([mscp, "-H", "-vv", "-W", "checkpoint",
+            "-n", 1, "-s", 8192, "-S", 16384,
+            src_prefix + "src1", src_prefix + "src2", dst_prefix + "dst"],
+           timeout = timeout)
+    assert os.path.exists("checkpoint")
+
+    run2ok([mscp, "-H", "-vv", "-R", "checkpoint"])
+    assert check_same_md5sum(src1, dst1)
+    assert check_same_md5sum(src2, dst2)
+    src1.cleanup()
+    src2.cleanup()
+    dst1.cleanup()
+    dst2.cleanup()
+    os.remove("checkpoint")

test/test_python.py

@@ -1,130 +0,0 @@
-
-"""
-test_python.py: Testing libmscp through the mscp python binding.
-"""
-
-import pytest
-import mscp
-import os
-from util import File, check_same_md5sum
-
-def test_create_and_release():
-    m = mscp.mscp("localhost", mscp.LOCAL2REMOTE)
-    m.cleanup()
-
-
-""" copy test """
-
-remote = "localhost"
-remote_prefix = "{}/".format(os.getcwd()) # use current dir
-param_remote_prefix_and_direction = [
-    ("", remote_prefix, mscp.LOCAL2REMOTE), (remote_prefix, "", mscp.REMOTE2LOCAL)
-]
-
-
-param_single_copy = [
-    (File("src", size = 64), File("dst")),
-    (File("src", size = 4096 * 1), File("dst")),
-    (File("src", size = 128 * 1024 * 1024), File("dst")),
-]
-
-@pytest.mark.parametrize("src_prefix, dst_prefix, direction",
-                         param_remote_prefix_and_direction)
-@pytest.mark.parametrize("src, dst", param_single_copy)
-def test_single_copy(src_prefix, dst_prefix, direction, src, dst):
-    src.make()
-    m = mscp.mscp(remote, direction)
-    m.copy(src_prefix + src.path, dst_prefix + dst.path)
-    assert check_same_md5sum(src, dst)
-    src.cleanup()
-    dst.cleanup()
-
-
-param_double_copy = [
-    (File("src1", size = 1024 * 1024), File("src2", size = 1024 * 1024),
-     File("dst/src1"), File("dst/src2")
-     )
-]
-@pytest.mark.parametrize("src_prefix, dst_prefix, direction",
-                         param_remote_prefix_and_direction)
-@pytest.mark.parametrize("s1, s2, d1, d2", param_double_copy)
-def test_double_copy(src_prefix, dst_prefix, direction, s1, s2, d1, d2):
-    s1.make()
-    s2.make()
-    mscp.mscp(remote, direction).copy([src_prefix + s1.path, src_prefix + s2.path],
-                                      dst_prefix + "dst")
-    assert check_same_md5sum(s1, d1)
-    assert check_same_md5sum(s2, d2)
-    s1.cleanup()
-    s2.cleanup()
-    d1.cleanup()
-    d2.cleanup()
-
-    
-param_single_copy = [
-    (File("src", size = 1024 * 1024 * 4), File("dst")),
-]
-
-param_kwargs = [
-    { "nr_threads": 6 },
-    { "nr_ahead": 64 },
-    { "min_chunk_sz": 1 * 1024 * 1024 },
-    { "max_chunk_sz": 64 * 1024 * 1024 },
-    { "coremask": "0x0f" },
-    { "max_startups": 5 },
-    { "severity": mscp.SEVERITY_NONE },
-    { "cipher": "aes128-gcm@openssh.com" },
-    { "compress": "yes" },
-    { "no_hostkey_check": True },
-    { "enable_nagle": True },
-]
-
-@pytest.mark.parametrize("src_prefix, dst_prefix, direction",
-                         param_remote_prefix_and_direction)
-@pytest.mark.parametrize("src, dst", param_single_copy)
-@pytest.mark.parametrize("kw", param_kwargs)
-def test_kwargs(src_prefix, dst_prefix, direction, src, dst, kw):
-    src.make()
-    m = mscp.mscp(remote, direction, **kw)
-    m.copy(src_prefix + src.path, dst_prefix + dst.path)
-    assert check_same_md5sum(src, dst)
-    src.cleanup()
-    dst.cleanup()
-
-def test_login_failed():
-    m = mscp.mscp("asdfasdf@" + remote, mscp.LOCAL2REMOTE)
-    with pytest.raises(RuntimeError) as e:
-        m.connect()
-
-    m = mscp.mscp(remote, mscp.LOCAL2REMOTE, login_name = "asdfadsf")
-    with pytest.raises(RuntimeError) as e:
-        m.connect()
-
-    m = mscp.mscp(remote, mscp.LOCAL2REMOTE, port = "65534")
-    with pytest.raises(RuntimeError) as e:
-        m.connect()
-
-def test_get_stat_before_copy_start():
-    m = mscp.mscp("localhost", mscp.LOCAL2REMOTE)
-    m.connect()
-    (total, done, finished) = m.stats()
-    assert total == 0 and done == 0
-
-
-param_invalid_kwargs = [
-    { "nr_threads": -1 },
-    { "nr_ahead": -1 },
-    { "min_chunk_sz": 1 },
-    { "max_chunk_sz": 1 },
-    { "coremask": "xxxxx" },
-    { "max_startups": -1 },
-    { "cipher": "invalid" },
-    { "hmac": "invalid"},
-    { "compress": "invalid"},
-]
-
-@pytest.mark.parametrize("kw", param_invalid_kwargs)
-def test_invalid_options(kw):
-    with pytest.raises(RuntimeError) as e:
-        m = mscp.mscp("localhost", mscp.LOCAL2REMOTE, **kw)
-        m.connect()

test/util.py

@@ -22,7 +22,10 @@ class File():
     def __str__(self):
         return self.path
 
-    def make(self):
+    def make(self, size = None):
+        if size:
+            self.size = size
+
         d = os.path.dirname(self.path)
         if d:
             os.makedirs(d, exist_ok = True)
@@ -43,8 +46,10 @@ class File():
         with open(self.path, "wb") as f:
             f.write(os.urandom(self.size))
 
-    def cleanup(self):
+    def cleanup(self, preserve_dir = False):
         os.remove(self.path)
+        if preserve_dir:
+            return
         tmp = os.path.dirname(self.path)
         while tmp and not tmp in [".", "/"]:
             if len(os.listdir(tmp)) == 0: