add message.h and message.c, mscp_set|get_error()

Instead of pr_err(), libmscp uses mscp_set_error() and
applications use mscp_get_errror() to get error message.

CMakeLists.txt

@@ -39,7 +39,7 @@ list(APPEND MSCP_LINK_LIBS ${ZLIB_LIBRARIES})
 
 
 
-set(LIBMSCP_SRC src/mscp.c src/ssh.c src/path.c src/pprint.c src/platform.c)
+set(LIBMSCP_SRC src/mscp.c src/ssh.c src/path.c src/pprint.c src/platform.c src/message.c)
 
 # shared libmscp
 add_library(mscp-shared SHARED ${LIBMSCP_SRC})

src/atomic.h

@@ -2,8 +2,10 @@
 #define _ATOMIC_H_
 
 #include <stdlib.h>
+#include <assert.h>
 #include <pthread.h>
-#include <util.h>
+
+#include <message.h>
 
 typedef int refcnt;
 
@@ -28,31 +30,13 @@ static inline void lock_init(lock *l)
 static inline void lock_acquire(lock *l)
 {
 	int ret = pthread_mutex_lock(l);
-	if (ret < 0) {
-		switch (ret) {
-		case EINVAL:
-			pr_err("invalid mutex\n");
-			exit(1);
-		case EDEADLK:
-			pr_err("a deadlock would occur\n");
-			exit(1);
-		}
-	}
+	assert(ret == 0);
 }
 
 static inline void lock_release(lock *l)
 {
 	int ret = pthread_mutex_unlock(l);
-	if (ret < 0) {
-		switch (ret) {
-		case EINVAL:
-			pr_err("invalid mutex\n");
-			exit(1);
-		case EPERM:
-			pr_err("this thread does not hold this mutex\n");
-			exit(1);
-		}
-	}
+	assert(ret == 0);
 }
 
 static inline void lock_release_via_cleanup(void *l)

src/main.c

@@ -66,7 +66,7 @@ char *split_remote_and_path(const char *string, char **remote, char **path)
 	 */
 
 	if (!(s = strdup(string))) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		fprintf(stderr, "strdup: %s\n", strerrno());
 		return NULL;
 	}
 
@@ -112,7 +112,7 @@ struct target *validate_targets(char **arg, int len)
 	int n;
 
 	if ((t = calloc(len, sizeof(struct target))) == NULL) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		fprintf(stderr, "calloc: %s\n", strerrno());
 		return NULL;
 	}
 	memset(t, 0, len * sizeof(struct target));
@@ -141,19 +141,19 @@ struct target *validate_targets(char **arg, int len)
 
 	/* check inconsistent remote position in args */
 	if (t[0].remote == NULL && t[len - 1].remote == NULL) {
-		pr_err("no remote host given\n");
+		fprintf(stderr, "no remote host given\n");
 		goto free_split_out;
 	}
 
 	if (t[0].remote != NULL && t[len - 1].remote != NULL) {
-		pr_err("no local path given\n");
+		fprintf(stderr, "no local path given\n");
 		goto free_split_out;
 	}
 
 	return t;
 
 invalid_remotes:
-	pr_err("specified remote host invalid\n");
+	fprintf(stderr, "specified remote host invalid\n");
 
 free_split_out:
 	for (n = 0; n < len; n++)
@@ -190,7 +190,8 @@ int main(int argc, char **argv)
 		case 'n':
 			o.nr_threads = atoi(optarg);
 			if (o.nr_threads < 1) {
-				pr_err("invalid number of connections: %s\n", optarg);
+				fprintf(stderr, "invalid number of connections: %s\n",
+					optarg);
 				return 1;
 			}
 			break;
@@ -223,42 +224,42 @@ int main(int argc, char **argv)
 			break;
 		case 'l':
 			if (strlen(optarg) > MSCP_SSH_MAX_LOGIN_NAME - 1) {
-				pr_err("too long login name: %s\n", optarg);
+				fprintf(stderr, "long login name: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.login_name, optarg, MSCP_SSH_MAX_LOGIN_NAME - 1);
 			break;
 		case 'p':
 			if (strlen(optarg) > MSCP_SSH_MAX_PORT_STR - 1) {
-				pr_err("too long port string: %s\n", optarg);
+				fprintf(stderr, "long port string: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.port, optarg, MSCP_SSH_MAX_PORT_STR);
 			break;
 		case 'i':
 			if (strlen(optarg) > MSCP_SSH_MAX_IDENTITY_PATH - 1) {
-				pr_err("too long identity path: %s\n", optarg);
+				fprintf(stderr, "long identity path: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.identity, optarg, MSCP_SSH_MAX_IDENTITY_PATH);
 			break;
 		case 'c':
 			if (strlen(optarg) > MSCP_SSH_MAX_CIPHER_STR - 1) {
-				pr_err("too long cipher string: %s\n", optarg);
+				fprintf(stderr, "long cipher string: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.cipher, optarg, MSCP_SSH_MAX_CIPHER_STR);
 			break;
 		case 'M':
 			if (strlen(optarg) > MSCP_SSH_MAX_HMAC_STR - 1) {
-				pr_err("too long hmac string: %s\n", optarg);
+				fprintf(stderr, "long hmac string: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.hmac, optarg, MSCP_SSH_MAX_HMAC_STR);
 			break;
 		case 'C':
 			if (strlen(optarg) > MSCP_SSH_MAX_COMP_STR - 1) {
-				pr_err("too long compress string: %s\n", optarg);
+				fprintf(stderr, "long compress string: %s\n", optarg);
 				return -1;
 			}
 			strncpy(s.compress, optarg, MSCP_SSH_MAX_COMP_STR);
@@ -301,32 +302,44 @@ int main(int argc, char **argv)
 		remote = t[i - 1].remote;
 	}
 
-	if ((m = mscp_init(remote, &o, &s)) == NULL)
+	if ((m = mscp_init(remote, &o, &s)) == NULL) {
+		fprintf(stderr, "mscp_init: %s\n", mscp_get_error());
 		return -1;
+	}
 
-	if (mscp_connect(m) < 0)
+	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)
+		if (mscp_add_src_path(m, t[n].path) < 0) {
+			fprintf(stderr, "mscp_add_src_path: %s\n", mscp_get_error());
 			return -1;
+		}
         }
 
-	if (mscp_set_dst_path(m, t[i - 1].path) < 0)
+	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_prepare(m) < 0)
+	if (mscp_prepare(m) < 0) {
+		fprintf(stderr, "mscp_prepare: %s\n", mscp_get_error());
 		return -1;
+	}
 
 	if (print_stat_init() < 0)
 		return -1;
 
 	if (signal(SIGINT, sigint_handler) == SIG_ERR) {
-		pr_err("cannot set handler for SIGINT: %s\n", strerrno());
+		fprintf(stderr, "signal: %s\n", strerrno());
 		return -1;
 	}
 
 	ret = mscp_start(m);
+	if (ret < 0)
+		fprintf(stderr, "%s\n", mscp_get_error());
 
 	print_stat_final();
 
@@ -488,7 +501,7 @@ int print_stat_init()
 	memset(&x, 0, sizeof(x));
 
         if (signal(SIGALRM, print_stat_handler) == SIG_ERR) {
-                pr_err("signal: %s\n", strerrno());
+                fprintf(stderr, "signal: %s\n", strerrno());
                 return -1;
         }
 

src/message.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <limits.h>
+
+#include <message.h>
+
+#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;
+}

src/message.h

@@ -0,0 +1,32 @@
+#ifndef _MESSAGE_H_
+#define _MESSAGE_H_
+
+#include <libgen.h>
+
+enum {
+	MSCP_SEVERITY_ERR = 0,
+	MSCP_SEVERITY_WARN,
+	MSCP_SEVERITY_NOTICE,
+	MSCP_SEVERITY_INFO,
+	MSCP_SEVERITY_DEBUG,
+};
+
+/* message print. printed messages are passed to application via msg_fd */
+//void mprint_set_severity(int severity);
+//void mprint(int severity, const char *fmt, ...);
+
+#define mpr_err(fmt, ...) mprint(MSCP_SEVERITY_ERR, fmt, ##__VA_ARGS__)
+#define mpr_warn(fmt, ...) mprint(MSCP_SEVERITY_WARN, fmt, ##__VA_ARGS__)
+#define mpr_notice(fmt, ...) mprint(MSCP_SEVERITY_NOTICE, fmt, ##__VA_ARGS__)
+#define mpr_info(fmt, ...) mprint(MSCP_SEVERITY_INFO, fmt, ##__VA_ARGS__)
+#define mpr_debug(fmt, ...) mprint(MSCP_SEVERITY_DEBUG, fmt, ##__VA_ARGS__)
+
+
+/* error message buffer */
+#define mscp_set_error(fmt, ...)						\
+	_mscp_set_error("%s:%d:%s: " fmt,				\
+			basename(__FILE__), __LINE__, __func__, ##__VA_ARGS__)
+
+void _mscp_set_error(const char *fmt, ...);
+
+#endif /* _MESSAGE_H_ */

src/mscp.c

@@ -11,6 +11,7 @@
 #include <pprint.h>             
 #include <atomic.h>             
 #include <platform.h>
+#include <message.h>
 #include <mscp.h>
 
 struct mscp {
@@ -82,7 +83,7 @@ static int expand_coremask(const char *coremask, int **cores, int *nr_cores)
 
         core_list = realloc(NULL, sizeof(int) * 64);
         if (!core_list) {
-                pr_err("failed to realloc: %s\n", strerrno());
+                mscp_set_error("failed to realloc: %s", strerrno());
                 return -1;
         }
 
@@ -92,7 +93,7 @@ static int expand_coremask(const char *coremask, int **cores, int *nr_cores)
                 c[0] = _coremask[n];
                 v = strtol(c, NULL, 16);
                 if (v == LONG_MIN || v == LONG_MAX) {
-                        pr_err("invalid coremask: %s\n", coremask);
+                        mscp_set_error("invalid coremask: %s", coremask);
                         return -1;
                 }
 
@@ -104,7 +105,7 @@ static int expand_coremask(const char *coremask, int **cores, int *nr_cores)
                                 nr_usable++;
                                 core_list = realloc(core_list, sizeof(int) * nr_usable);
                                 if (!core_list) {
-                                        pr_err("failed to realloc: %s\n", strerrno());
+                                        mscp_set_error("realloc: %s", strerrno());
                                         return -1;
                                 }
                                 core_list[nr_usable - 1] = nr_all - 1;
@@ -113,7 +114,7 @@ static int expand_coremask(const char *coremask, int **cores, int *nr_cores)
         }
 
         if (nr_usable < 1) {
-                pr_err("invalid core mask: %s\n", coremask);
+                mscp_set_error("invalid core mask: %s", coremask);
                 return -1;
         }
 
@@ -131,18 +132,18 @@ static int validate_and_set_defaut_params(struct mscp_opts *o)
 {
 	if (!(o->direction == MSCP_DIRECTION_L2R ||
 	      o->direction == MSCP_DIRECTION_R2L)) {
-		pr_err("invalid copy direction: %d\n", o->direction);
+		mscp_set_error("invalid copy direction: %d", o->direction);
 		return -1;
 	}
 
 	if (o->nr_threads < 0) {
-		pr_err("invalid nr_threads: %d\n", o->nr_threads);
+		mscp_set_error("invalid nr_threads: %d", o->nr_threads);
 		return -1;
 	} else if (o->nr_threads == 0)
 		o->nr_threads = default_nr_threads();
 
 	if (o->nr_ahead < 0) {
-		pr_err("invalid nr_ahead: %d\n", o->nr_ahead);
+		mscp_set_error("invalid nr_ahead: %d", o->nr_ahead);
 		return -1;
 	} else if (o->nr_ahead == 0)
 		o->nr_ahead = DEFAULT_NR_AHEAD;
@@ -152,9 +153,9 @@ static int validate_and_set_defaut_params(struct mscp_opts *o)
 	else {
 		if (o->min_chunk_sz < getpagesize() ||
 		    o->min_chunk_sz % getpagesize() != 0) {
-			pr_err("min chunk size must be "
-			       "larget than and multiple of page size %d: %lu\n",
-			       getpagesize(), o->min_chunk_sz);
+			mscp_set_error("min chunk size must be "
+				       "larget than and multiple of page size %d: %lu",
+				       getpagesize(), o->min_chunk_sz);
 			return -1;
 		}
 	}
@@ -162,13 +163,14 @@ static int validate_and_set_defaut_params(struct mscp_opts *o)
 	if (o->max_chunk_sz) {
 		if (o->max_chunk_sz < getpagesize() ||
 		    o->max_chunk_sz % getpagesize() != 0) {
-			pr_err("min chunk size must be "
-			       "larget than and multiple of page size %d: %lu\n",
-			       getpagesize(), o->max_chunk_sz);
+			mscp_set_error("min chunk size must be larget than and "
+				       "multiple of page size %d: %lu",
+				       getpagesize(), o->max_chunk_sz);
 		}
 		if (o->min_chunk_sz > o->max_chunk_sz) {
-			pr_err("smaller max chunk size than min chunk size: %lu < %lu\n",
-			       o->max_chunk_sz, o->min_chunk_sz);
+			mscp_set_error("smaller max chunk size than "
+				       "min chunk size: %lu < %lu",
+				       o->max_chunk_sz, o->min_chunk_sz);
 			return -1;
 		}
 	}
@@ -176,7 +178,7 @@ static int validate_and_set_defaut_params(struct mscp_opts *o)
 	if (o->buf_sz == 0)
 		o->buf_sz = DEFAULT_BUF_SZ;
 	else if (o->buf_sz == 0) {
-		pr_err("invalid buf size: %lu\n", o->buf_sz);
+		mscp_set_error("invalid buf size: %lu", o->buf_sz);
 		return -1;
 	}
 
@@ -191,7 +193,7 @@ struct mscp *mscp_init(const char *remote_host,
 
 	m = malloc(sizeof(*m));
 	if (!m) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		mscp_set_error("failed to allocate memory: %s", strerrno());
 		return NULL;
 	}
 
@@ -205,7 +207,7 @@ struct mscp *mscp_init(const char *remote_host,
 	lock_init(&m->chunk_lock);
 	m->remote = strdup(remote_host);
 	if (!m->remote) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		mscp_set_error("failed to allocate memory: %s", strerrno());
 		goto free_out;
 	}
 
@@ -245,14 +247,14 @@ int mscp_add_src_path(struct mscp *m, const char *src_path)
 
 	s = malloc(sizeof(*s));
 	if (!s) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		mscp_set_error("failed to allocate memory: %s", strerrno());
 		return -1;
 	}
 
 	memset(s, 0, sizeof(*s));
 	s->path = strdup(src_path);
 	if (!s->path) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		mscp_set_error("failed to allocate memory: %s", strerrno());
 		free(s);
 		return -1;
 	}
@@ -264,7 +266,7 @@ int mscp_add_src_path(struct mscp *m, const char *src_path)
 int mscp_set_dst_path(struct mscp *m, const char *dst_path)
 {
 	if (strlen(dst_path) + 1 >= PATH_MAX) {
-		pr_err("too long dst path: %s\n", dst_path);
+		mscp_set_error("too long dst path: %s", dst_path);
 		return -1;
 	}
 
@@ -296,7 +298,7 @@ int mscp_prepare(struct mscp *m)
 		dst_sftp = NULL;
 		break;
 	default:
-		pr_err("invalid copy direction: %d\n", m->opts->direction);
+		mscp_set_error("invalid copy direction: %d", m->opts->direction);
 		return -1;
 	}
 
@@ -313,7 +315,7 @@ int mscp_prepare(struct mscp *m)
 	/* walk a src_path recusively, and resolve path->dst_path for each src */
 	list_for_each_entry(s, &m->src_list, list) {
 		if (mscp_stat(s->path, &ss, src_sftp) < 0) {
-			pr_err("stat: %s\n", mscp_strerror(src_sftp));
+			mscp_set_error("stat: %s", mscp_strerror(src_sftp));
 			return -1;
 		}
 		src_path_is_dir = mstat_is_dir(ss);
@@ -398,7 +400,7 @@ int mscp_start(struct mscp *m)
                 struct mscp_thread *t = &m->threads[n];
                 ret = pthread_create(&t->tid, NULL, mscp_copy_thread, t);
                 if (ret < 0) {
-                        pr_err("pthread_create error: %d\n", ret);
+                        mscp_set_error("pthread_create error: %d", ret);
                         mscp_stop(m);
                         ret = 1;
                         goto join_out;
@@ -504,8 +506,8 @@ void *mscp_copy_thread(void *arg)
         pthread_cleanup_pop(1);
 
         if (t->ret < 0)
-                pr_err("copy failed: chunk %s 0x%010lx-0x%010lx\n",
-                       c->p->path, c->off, c->off + c->len);
+                mscp_set_error("copy failed: chunk %s 0x%010lx-0x%010lx",
+			       c->p->path, c->off, c->off + c->len);
 
         return NULL;
 }

src/mscp.h

@@ -63,6 +63,12 @@ struct mscp;
 struct mscp *mscp_init(const char *remote_host,
 		       struct mscp_opts *o, struct mscp_ssh_opts *s);
 
+/* return a fd for read message from mscp */
+int mscp_msg_fd(struct mscp *m);
+
+/* get message for the most recent error (not thread safe) */
+const char *mscp_get_error();
+
 /* establish the first SFTP session. mscp_prepare() and mscp_start()
  * requires mscp_connect() beforehand */
 int mscp_connect(struct mscp *m);

src/path.c

@@ -11,7 +11,7 @@
 #include <atomic.h>
 #include <path.h>
 #include <pprint.h>
-
+#include <message.h>
 
 static int append_path(sftp_session sftp, const char *path, mstat s,
 		       struct list_head *path_list)
@@ -19,7 +19,7 @@ static int append_path(sftp_session sftp, const char *path, mstat s,
 	struct path *p;
 
 	if (!(p = malloc(sizeof(*p)))) {
-		pr_err("failed to allocate memory: %s\n", strerrno());
+		mscp_set_error("failed to allocate memory: %s", strerrno());
 		return -1;
 	}
 
@@ -82,7 +82,7 @@ static int walk_path_recursive(sftp_session sftp, const char *path,
 			continue;
 		
 		if (strlen(path) + 1 + strlen(mdirent_name(e)) > PATH_MAX) {
-			pr_err("too long path: %s/%s\n", path, mdirent_name(e));
+			mscp_set_error("too long path: %s/%s", path, mdirent_name(e));
 			return -1;
 		}
 		snprintf(next_path, sizeof(next_path), "%s/%s", path, mdirent_name(e));
@@ -114,7 +114,7 @@ static int src2dst_path(const char *src_path, const char *src_file_path,
 	strncpy(copy, src_path, PATH_MAX - 1);
 	prefix = dirname(copy);
 	if (!prefix) {
-		pr_err("dirname: %s\n", strerrno());
+		mscp_set_error("dirname: %s", strerrno());
 		return -1;
 	}
 	if (strlen(prefix) == 1 && prefix[0] == '.')
@@ -184,7 +184,7 @@ static struct chunk *alloc_chunk(struct path *p)
         struct chunk *c;
 
         if (!(c = malloc(sizeof(*c)))) {
-                pr_err("%s\n", strerrno());
+                mscp_set_error("malloc %s", strerrno());
                 return NULL;
         }
         memset(c, 0, sizeof(*c));
@@ -292,7 +292,8 @@ static int touch_dst_path(struct path *p, sftp_session sftp)
 		if (mscp_stat_check_err_noent(sftp) == 0) {
 			/* no file on the path. create directory. */
 			if (mscp_mkdir(path, mode, sftp) < 0) {
-				pr_err("mkdir %s: %s", path, mscp_strerror(sftp));
+				mscp_set_error("mkdir %s: %s", path,
+					       mscp_strerror(sftp));
 				return -1;
 			}
 		}
@@ -357,8 +358,8 @@ static int copy_chunk_l2r(struct chunk *c, int fd, sftp_file sf,
                 reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
                                                  &reqs[idx].id);
                 if (reqs[idx].len < 0) {
-                        pr_err("sftp_async_write: %s or %s\n",
-			       sftp_get_ssh_error(sf->sftp), strerrno());
+                        mscp_set_error("sftp_async_write: %s or %s",
+				       sftp_get_ssh_error(sf->sftp), strerrno());
                         return -1;
                 }
                 thrown -= reqs[idx].len;
@@ -367,8 +368,8 @@ static int copy_chunk_l2r(struct chunk *c, int fd, sftp_file sf,
         for (idx = 0; remaind > 0; idx = (idx + 1) % nr_ahead) {
                 ret = sftp_async_write_end(sf, reqs[idx].id, 1);
                 if (ret != SSH_OK) {
-                        pr_err("sftp_async_write_end: %s\n",
-			       sftp_get_ssh_error(sf->sftp));
+                        mscp_set_error("sftp_async_write_end: %s",
+				       sftp_get_ssh_error(sf->sftp));
                         return -1;
                 }
 
@@ -385,16 +386,17 @@ static int copy_chunk_l2r(struct chunk *c, int fd, sftp_file sf,
                 reqs[idx].len = sftp_async_write(sf, read_to_buf, reqs[idx].len, &fd,
                                                  &reqs[idx].id);
                 if (reqs[idx].len < 0) {
-                        pr_err("sftp_async_write: %s or %s\n",
-                               sftp_get_ssh_error(sf->sftp), strerrno());
+                        mscp_set_error("sftp_async_write: %s or %s",
+				       sftp_get_ssh_error(sf->sftp), strerrno());
                         return -1;
                 }
                 thrown -= reqs[idx].len;
         }
 
         if (remaind < 0) {
-                pr_err("invalid remaind bytes %ld. last async_write_end bytes %lu.",
-                       remaind, reqs[idx].len);
+                mscp_set_error("invalid remaind bytes %ld. "
+			       "last async_write_end bytes %lu.",
+			       remaind, reqs[idx].len);
                 return -1;
         }
 
@@ -422,8 +424,8 @@ static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd,
                 reqs[idx].len = min(thrown, sizeof(buf));
                 reqs[idx].id = sftp_async_read_begin(sf, reqs[idx].len);
                 if (reqs[idx].id < 0) {
-                        pr_err("sftp_async_read_begin: %d\n",
-                               sftp_get_error(sf->sftp));
+                        mscp_set_error("sftp_async_read_begin: %d",
+				       sftp_get_error(sf->sftp));
                         return -1;
                 }
                 thrown -= reqs[idx].len;
@@ -432,7 +434,8 @@ static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd,
         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) {
-                        pr_err("sftp_async_read: %d\n", sftp_get_error(sf->sftp));
+                        mscp_set_error("sftp_async_read: %d",
+				       sftp_get_error(sf->sftp));
                         return -1;
                 }
 
@@ -444,12 +447,12 @@ static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd,
 
                 write_bytes = write(fd, buf, read_bytes);
                 if (write_bytes < 0) {
-                        pr_err("write: %s\n", strerrno());
+                        mscp_set_error("write: %s", strerrno());
                         return -1;
                 }
 
                 if (write_bytes < read_bytes) {
-                        pr_err("failed to write full bytes\n");
+                        mscp_set_error("failed to write full bytes");
                         return -1;
                 }
 
@@ -458,9 +461,9 @@ static int copy_chunk_r2l(struct chunk *c, sftp_file sf, int fd,
         }
 
         if (remaind < 0) {
-                pr_err("invalid remaind bytes %ld. last async_read bytes %ld. "
-                       "last write bytes %ld\n",
-                       remaind, read_bytes, write_bytes);
+                mscp_set_error("invalid remaind bytes %ld. last async_read bytes %ld. "
+			       "last write bytes %ld",
+			       remaind, read_bytes, write_bytes);
                 return -1;
         }
 

src/path.h

@@ -9,6 +9,7 @@
 #include <list.h>
 #include <atomic.h>
 #include <ssh.h>
+#include <message.h>
 
 struct path {
 	struct list_head	list;	/* mscp->path_list */
@@ -99,15 +100,15 @@ static mdir *mscp_opendir(const char *path, sftp_session sftp)
         if (sftp) {
                 d->r = sftp_opendir(sftp, path);
                 if (!d->r) {
-                        pr_err("sftp_opendir '%s': %s\n",
-			       path, sftp_get_ssh_error(sftp));
+                        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) {
-                        pr_err("opendir '%s': %s\n", path, strerrno());
+                        mscp_set_error("opendir '%s': %s", path, strerrno());
                         free(d);
                         return NULL;
                 }
@@ -207,14 +208,13 @@ static int mscp_mkdir(const char *path, mode_t mode, sftp_session sftp)
 		ret = sftp_mkdir(sftp, path, mode);
 		if (ret < 0 &&
 		    sftp_get_error(sftp) != SSH_FX_FILE_ALREADY_EXISTS) {
-			pr_err("failed to create %s: %s\n",
-			       path, sftp_get_ssh_error(sftp));
+			mscp_set_error("sftp_mkdir '%s': %s",
+				       path, sftp_get_ssh_error(sftp));
 			return -1;
 		}
 	} else {
 		if (mkdir(path, mode) == -1 && errno != EEXIST) {
-			pr_err("failed to create %s: %s\n",
-			       path, strerrno());
+			mscp_set_error("mkdir '%s': %s", path, strerrno());
 			return -1;
 		}
 	}
@@ -240,12 +240,14 @@ static mfh mscp_open(const char *path, int flags, mode_t mode, size_t off,
 	if (sftp) {
 		h.sf = sftp_open(sftp, path, flags, mode);
 		if (!h.sf) {
-			pr_err("sftp_open '%s': %s\n", path, sftp_get_ssh_error(sftp));
+			mscp_set_error("sftp_open '%s': %s",
+				       path, sftp_get_ssh_error(sftp));
 			return h;
 		}
 
 		if (sftp_seek64(h.sf, off) < 0) {
-			pr_err("sftp_seek64 '%s': %s\n", path, sftp_get_ssh_error(sftp));
+			mscp_set_error("sftp_seek64 '%s': %s",
+				       path, sftp_get_ssh_error(sftp));
 			sftp_close(h.sf);
 			h.sf = NULL;
 			return h;
@@ -253,11 +255,11 @@ static mfh mscp_open(const char *path, int flags, mode_t mode, size_t off,
 	} else {
 		h.fd = open(path, flags, mode);
 		if (h.fd < 0) {
-			pr_err("open '%s': %s\n", path, strerrno());
+			mscp_set_error("open '%s': %s", path, strerrno());
 			return h;
 		}
 		if (lseek(h.fd, off, SEEK_SET) < 0) {
-			pr_err("lseek '%s': %s\n", path, strerrno());
+			mscp_set_error("lseek '%s': %s", path, strerrno());
 			close(h.fd);
 			h.fd = -1;
 			return h;
@@ -285,12 +287,13 @@ static int mscp_chmod(const char *path, mode_t mode, sftp_session sftp)
 {
 	if (sftp) {
 		if (sftp_chmod(sftp, path, mode) < 0)  {
-			pr_err("sftp_chmod '%s': %s\n", path, sftp_get_ssh_error(sftp));
+			mscp_set_error("sftp_chmod '%s': %s",
+				       path, sftp_get_ssh_error(sftp));
 			return -1;
 		}
 	} else {
 		if (chmod(path, mode) < 0) {
-			pr_err("chmod '%s': %s\n", path, strerrno());
+			mscp_set_error("chmod '%s': %s", path, strerrno());
 			return -1;
 		}
 	}

src/platform.c

@@ -10,6 +10,7 @@
 
 #include <util.h>
 #include <platform.h>
+#include <message.h>
 
 #ifdef __APPLE__
 int nr_cpus()
@@ -18,7 +19,7 @@ int nr_cpus()
 	size_t size = sizeof(n);
 
 	if (sysctlbyname("machdep.cpu.core_count", &n, &size, NULL, 0) != 0) {
-		pr_err("failed to get number of cpu cores: %s\n", strerrno());
+		mscp_set_error("failed to get number of cpu cores: %s", strerrno());
 		return -1;
 	}
 
@@ -51,8 +52,8 @@ 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)
-		pr_err("failed to set thread/cpu affinity for core %d: %s",
-		       core, strerrno());
+		mscp_set_error("failed to set thread/cpu affinity for core %d: %s",
+			       core, strerrno());
 	return ret;
 }
 #endif

src/ssh.c

@@ -7,6 +7,7 @@
 
 #include <ssh.h>
 #include <util.h>
+#include <message.h>
 
 static int ssh_verify_known_hosts(ssh_session session);
 
@@ -19,47 +20,47 @@ static int ssh_set_opts(ssh_session ssh, struct mscp_ssh_opts *opts)
 
 	if (is_specified(opts->login_name) &&
 	    ssh_options_set(ssh, SSH_OPTIONS_USER, opts->login_name) < 0) {
-		pr_err("failed to set login name\n");
+		mscp_set_error("failed to set login name");
 		return -1;
 	}
 
 	if (is_specified(opts->port) &&
 	    ssh_options_set(ssh, SSH_OPTIONS_PORT_STR, opts->port) < 0) {
-		pr_err("failed to set port number\n");
+		mscp_set_error("failed to set port number");
 		return -1;
 	}
 
 	if (is_specified(opts->identity) &&
 	    ssh_options_set(ssh, SSH_OPTIONS_IDENTITY, opts->identity) < 0) {
-		pr_err("failed to set identity\n");
+		mscp_set_error("failed to set identity");
 		return -1;
 	}
 
 	if (is_specified(opts->cipher)) {
 		if (ssh_options_set(ssh, SSH_OPTIONS_CIPHERS_C_S, opts->cipher) < 0) {
-			pr_err("failed to set cipher for client to server\n");
+			mscp_set_error("failed to set cipher for client to server");
 			return -1;
 		}
 		if (ssh_options_set(ssh, SSH_OPTIONS_CIPHERS_S_C, opts->cipher) < 0) {
-			pr_err("failed to set cipher for server to client\n");
+			mscp_set_error("failed to set cipher for server to client");
 			return -1;
 		}
 	}
 
 	if (is_specified(opts->hmac)) {
 		if (ssh_options_set(ssh, SSH_OPTIONS_HMAC_C_S, opts->hmac) < 0) {
-			pr_err("failed to set hmac for client to server\n");
+			mscp_set_error("failed to set hmac for client to server");
 			return -1;
 		}
 		if (ssh_options_set(ssh, SSH_OPTIONS_HMAC_S_C, opts->hmac) < 0) {
-			pr_err("failed to set hmac for server to client\n");
+			mscp_set_error("failed to set hmac for server to client");
 			return -1;
 		}
 	}
 
 	if (is_specified(opts->compress) &&
 	    ssh_options_set(ssh, SSH_OPTIONS_COMPRESSION, opts->compress) < 0) {
-		pr_err("failed to enable ssh compression\n");
+		mscp_set_error("failed to enable ssh compression");
 		return -1;
 	}
 
@@ -67,7 +68,7 @@ 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) {
-			pr_err("failed to set TCP_NODELAY\n");
+			mscp_set_error("failed to set TCP_NODELAY");
 			return -1;
 		}
 	}
@@ -152,17 +153,17 @@ static ssh_session ssh_init_session(const char *sshdst, struct mscp_ssh_opts *op
 		goto free_out;
 
 	if (ssh_options_set(ssh, SSH_OPTIONS_HOST, sshdst) != SSH_OK) {
-		pr_err("failed to set destination host\n");
+		mscp_set_error("failed to set destination host");
 		goto free_out;
 	}
 
 	if (ssh_connect(ssh) != SSH_OK) {
-		pr_err("failed to connect ssh server: %s\n", ssh_get_error(ssh));
+		mscp_set_error("failed to connect ssh server: %s", ssh_get_error(ssh));
 		goto free_out;
 	}
 
 	if (ssh_authenticate(ssh, opts) != 0) {
-		pr_err("authentication failed: %s\n", ssh_get_error(ssh));
+		mscp_set_error("authentication failed: %s", ssh_get_error(ssh));
 		goto disconnect_out;
 	}
 
@@ -190,13 +191,14 @@ sftp_session ssh_init_sftp_session(const char *sshdst, struct mscp_ssh_opts *opt
 
 	sftp = sftp_new(ssh);
 	if (!sftp) {
-		pr_err("failed to allocate sftp session: %s\n", ssh_get_error(ssh));
+		mscp_set_error("failed to allocate sftp session: %s",
+			       ssh_get_error(ssh));
 		goto err_out;
 	}
 
 	if (sftp_init(sftp) != SSH_OK) {
-		pr_err("failed to initialize sftp session: err code %d\n",
-		       sftp_get_error(sftp));
+		mscp_set_error("failed to initialize sftp session: err code %d",
+			       sftp_get_error(sftp));
 		goto err_out;
 	}