260 lines
6.4 KiB
C
260 lines
6.4 KiB
C
/*
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* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: sftp.c,v 1.30 2002/06/23 09:30:14 deraadt Exp $");
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/* XXX: short-form remote directory listings (like 'ls -C') */
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#include "buffer.h"
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#include "xmalloc.h"
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#include "log.h"
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#include "pathnames.h"
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#include "misc.h"
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#include "sftp.h"
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#include "sftp-common.h"
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#include "sftp-client.h"
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#include "sftp-int.h"
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#ifdef HAVE___PROGNAME
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extern char *__progname;
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#else
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char *__progname;
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#endif
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FILE* infile;
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size_t copy_buffer_len = 32768;
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size_t num_requests = 16;
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static void
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connect_to_server(char *path, char **args, int *in, int *out, pid_t *sshpid)
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{
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int c_in, c_out;
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#ifdef USE_PIPES
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int pin[2], pout[2];
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if ((pipe(pin) == -1) || (pipe(pout) == -1))
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fatal("pipe: %s", strerror(errno));
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*in = pin[0];
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*out = pout[1];
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c_in = pout[0];
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c_out = pin[1];
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#else /* USE_PIPES */
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int inout[2];
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
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fatal("socketpair: %s", strerror(errno));
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*in = *out = inout[0];
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c_in = c_out = inout[1];
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#endif /* USE_PIPES */
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if ((*sshpid = fork()) == -1)
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fatal("fork: %s", strerror(errno));
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else if (*sshpid == 0) {
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if ((dup2(c_in, STDIN_FILENO) == -1) ||
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(dup2(c_out, STDOUT_FILENO) == -1)) {
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fprintf(stderr, "dup2: %s\n", strerror(errno));
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exit(1);
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}
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close(*in);
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close(*out);
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close(c_in);
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close(c_out);
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execv(path, args);
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fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
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exit(1);
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}
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close(c_in);
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close(c_out);
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}
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static void
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usage(void)
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{
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extern char *__progname;
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fprintf(stderr,
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"usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem|path] [-B buffer_size]\n"
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" [-F config] [-P direct server path] [-S program]\n"
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" [user@]host[:file [file]]\n", __progname);
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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int in, out, ch;
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pid_t sshpid;
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char *host, *userhost, *cp, *file2;
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int debug_level = 0, sshver = 2;
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char *file1 = NULL, *sftp_server = NULL;
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char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL;
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LogLevel ll = SYSLOG_LEVEL_INFO;
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arglist args;
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extern int optind;
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extern char *optarg;
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__progname = get_progname(argv[0]);
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args.list = NULL;
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addargs(&args, "ssh"); /* overwritten with ssh_program */
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addargs(&args, "-oFallBackToRsh no");
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addargs(&args, "-oForwardX11 no");
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addargs(&args, "-oForwardAgent no");
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addargs(&args, "-oClearAllForwardings yes");
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ll = SYSLOG_LEVEL_INFO;
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infile = stdin; /* Read from STDIN unless changed by -b */
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while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
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switch (ch) {
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case 'C':
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addargs(&args, "-C");
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break;
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case 'v':
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if (debug_level < 3) {
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addargs(&args, "-v");
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ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
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}
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debug_level++;
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break;
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case 'F':
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case 'o':
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addargs(&args, "-%c%s", ch, optarg);
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break;
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case '1':
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sshver = 1;
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if (sftp_server == NULL)
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sftp_server = _PATH_SFTP_SERVER;
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break;
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case 's':
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sftp_server = optarg;
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break;
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case 'S':
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ssh_program = optarg;
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break;
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case 'b':
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if (infile == stdin) {
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infile = fopen(optarg, "r");
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if (infile == NULL)
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fatal("%s (%s).", strerror(errno), optarg);
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} else
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fatal("Filename already specified.");
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break;
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case 'P':
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sftp_direct = optarg;
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break;
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case 'B':
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copy_buffer_len = strtol(optarg, &cp, 10);
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if (copy_buffer_len == 0 || *cp != '\0')
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fatal("Invalid buffer size \"%s\"", optarg);
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break;
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case 'R':
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num_requests = strtol(optarg, &cp, 10);
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if (num_requests == 0 || *cp != '\0')
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fatal("Invalid number of requests \"%s\"",
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optarg);
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break;
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case 'h':
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default:
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usage();
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}
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}
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log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
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if (sftp_direct == NULL) {
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if (optind == argc || argc > (optind + 2))
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usage();
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userhost = xstrdup(argv[optind]);
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file2 = argv[optind+1];
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if ((cp = colon(userhost)) != NULL) {
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*cp++ = '\0';
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file1 = cp;
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}
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if ((host = strchr(userhost, '@')) == NULL)
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host = userhost;
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else {
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*host++ = '\0';
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if (!userhost[0]) {
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fprintf(stderr, "Missing username\n");
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usage();
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}
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addargs(&args, "-l%s",userhost);
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}
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host = cleanhostname(host);
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if (!*host) {
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fprintf(stderr, "Missing hostname\n");
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usage();
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}
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addargs(&args, "-oProtocol %d", sshver);
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/* no subsystem if the server-spec contains a '/' */
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if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
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addargs(&args, "-s");
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addargs(&args, "%s", host);
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addargs(&args, "%s", (sftp_server != NULL ?
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sftp_server : "sftp"));
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args.list[0] = ssh_program;
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fprintf(stderr, "Connecting to %s...\n", host);
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connect_to_server(ssh_program, args.list, &in, &out,
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&sshpid);
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} else {
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args.list = NULL;
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addargs(&args, "sftp-server");
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fprintf(stderr, "Attaching to %s...\n", sftp_direct);
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connect_to_server(sftp_direct, args.list, &in, &out,
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&sshpid);
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}
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interactive_loop(in, out, file1, file2);
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#if !defined(USE_PIPES)
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shutdown(in, SHUT_RDWR);
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shutdown(out, SHUT_RDWR);
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#endif
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close(in);
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close(out);
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if (infile != stdin)
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fclose(infile);
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while (waitpid(sshpid, NULL, 0) == -1)
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if (errno != EINTR)
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fatal("Couldn't wait for ssh process: %s",
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strerror(errno));
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exit(0);
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}
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