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Ryo Nakamura
2022-10-15 21:59:25 +09:00
commit 303a9eb974
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src/main.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <util.h>
#include <ssh.h>
#include <file.h>
#include <platform.h>
#define DEFAULT_MIN_CHUNK_SZ (2 << 20) /* 2MB */
void usage(bool print_help) {
printf("sscp: super scp, copy files over multiple ssh connections\n"
"\n"
"Usage: sscp [rvC] [-n max_conns] [-s min_chunk_sz] [-S max_chunk_sz]\n"
" [-l login_name] [-p port] [-i identity_file]\n"
" [-c cipher_spec] source ... target\n"
"\n");
if (!print_help)
return;
printf(" -r copy directory recusrively\n"
" -n NR_CONNECTIONS max number of connections (default: # of cpu cores)\n"
" -s CHUNKSIZE min chunk size (default: 2MB)\n"
" -S CHUNKSIZE max chunk size (default: filesize / nr_conn)\n"
"\n"
" -l LOGIN_NAME login name\n"
" -p PORT port number\n"
" -i IDENTITY identity to be used for ssh\n"
" -c CIPHER cipher spec, see `ssh -Q cipher`\n"
" -C enable compression on libssh\n"
" -v increment output level\n"
" -h print this help\n"
"\n");
}
int main(int argc, char **argv)
{
struct ssh_opts opts;
int nr_conn = nr_cpus();
bool recursive = false;
int min_chunk_sz = DEFAULT_MIN_CHUNK_SZ;
int max_chunk_sz = 0;
char ch;
memset(&opts, 0, sizeof(opts));
while ((ch = getopt(argc, argv, "r:n:s:S:l:p:i:c:Cvh")) != -1) {
switch (ch) {
case 'r':
recursive = true;
break;
case 'n':
nr_conn = atoi(optarg);
if (nr_conn < 1) {
pr_err("invalid number of connections: %s\n", optarg);
return 1;
}
break;
case 's':
min_chunk_sz = atoi(optarg);
if (min_chunk_sz < getpagesize()) {
pr_err("min chunk size must be "
"larger than or equal to %d: %s\n",
getpagesize(), optarg);
return 1;
}
if (min_chunk_sz % getpagesize() != 0) {
pr_err("min chunk size must be "
"multiple of page size %d: %s\n",
getpagesize(), optarg);
return -1;
}
break;
case 'S':
max_chunk_sz = atoi(optarg);
if (max_chunk_sz < getpagesize()) {
pr_err("max chunk size must be "
"larger than or equal to %d: %s\n",
getpagesize(), optarg);
return 1;
}
if (max_chunk_sz % getpagesize() != 0) {
pr_err("max chunk size must be "
"multiple of page size %d: %s\n",
getpagesize(), optarg);
return -1;
}
break;
case 'l':
opts.login_name = optarg;
break;
case 'p':
opts.port = optarg;
break;
case 'i':
opts.identity = optarg;
break;
case 'c':
opts.cipher = optarg;
break;
case 'C':
opts.compress++;
break;
case 'v':
opts.debuglevel++;
break;
case 'h':
usage(true);
return 1;
default:
usage(false);
return 1;
}
}
if (max_chunk_sz > 0 && min_chunk_sz > max_chunk_sz) {
pr_err("smaller max chunk size than min chunk size: %d < %d\n",
max_chunk_sz, min_chunk_sz);
return 1;
}
printf("opts.port %s\n", opts.port);
int n;
for (n = 0; n < argc; n++) {
printf("%d %s\n", n, argv[n]);
}
printf("optind %d", optind);
return 0;
}