[openssh.git] / sftp.c

/*
 * Copyright (c) 2001,2002 Damien Miller.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "includes.h"

RCSID("$OpenBSD: sftp.c,v 1.30 2002/06/23 09:30:14 deraadt Exp $");

/* XXX: short-form remote directory listings (like 'ls -C') */

#include "buffer.h"
#include "xmalloc.h"
#include "log.h"
#include "pathnames.h"
#include "misc.h"

#include "sftp.h"
#include "sftp-common.h"
#include "sftp-client.h"
#include "sftp-int.h"

#ifdef HAVE___PROGNAME
extern char *__progname;
#else
char *__progname;
#endif

FILE* infile;
size_t copy_buffer_len = 32768;
size_t num_requests = 16;

static void
connect_to_server(char *path, char **args, int *in, int *out, pid_t *sshpid)
{
	int c_in, c_out;

#ifdef USE_PIPES
	int pin[2], pout[2];

	if ((pipe(pin) == -1) || (pipe(pout) == -1))
		fatal("pipe: %s", strerror(errno));
	*in = pin[0];
	*out = pout[1];
	c_in = pout[0];
	c_out = pin[1];
#else /* USE_PIPES */
	int inout[2];

	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
		fatal("socketpair: %s", strerror(errno));
	*in = *out = inout[0];
	c_in = c_out = inout[1];
#endif /* USE_PIPES */

	if ((*sshpid = fork()) == -1)
		fatal("fork: %s", strerror(errno));
	else if (*sshpid == 0) {
		if ((dup2(c_in, STDIN_FILENO) == -1) ||
		    (dup2(c_out, STDOUT_FILENO) == -1)) {
			fprintf(stderr, "dup2: %s\n", strerror(errno));
			exit(1);
		}
		close(*in);
		close(*out);
		close(c_in);
		close(c_out);
		execv(path, args);
		fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
		exit(1);
	}

	close(c_in);
	close(c_out);
}

static void
usage(void)
{
	extern char *__progname;

	fprintf(stderr,
	    "usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem|path] [-B buffer_size]\n"
	    "            [-F config] [-P direct server path] [-S program]\n"
	    "            [user@]host[:file [file]]\n", __progname);
	exit(1);
}

int
main(int argc, char **argv)
{
	int in, out, ch;
	pid_t sshpid;
	char *host, *userhost, *cp, *file2;
	int debug_level = 0, sshver = 2;
	char *file1 = NULL, *sftp_server = NULL;
	char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL;
	LogLevel ll = SYSLOG_LEVEL_INFO;
	arglist args;
	extern int optind;
	extern char *optarg;

	__progname = get_progname(argv[0]);
	args.list = NULL;
	addargs(&args, "ssh");		/* overwritten with ssh_program */
	addargs(&args, "-oFallBackToRsh no");
	addargs(&args, "-oForwardX11 no");
	addargs(&args, "-oForwardAgent no");
	addargs(&args, "-oClearAllForwardings yes");
	ll = SYSLOG_LEVEL_INFO;
	infile = stdin;		/* Read from STDIN unless changed by -b */

	while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
		switch (ch) {
		case 'C':
			addargs(&args, "-C");
			break;
		case 'v':
			if (debug_level < 3) {
				addargs(&args, "-v");
				ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
			}
			debug_level++;
			break;
		case 'F':
		case 'o':
			addargs(&args, "-%c%s", ch, optarg);
			break;
		case '1':
			sshver = 1;
			if (sftp_server == NULL)
				sftp_server = _PATH_SFTP_SERVER;
			break;
		case 's':
			sftp_server = optarg;
			break;
		case 'S':
			ssh_program = optarg;
			break;
		case 'b':
			if (infile == stdin) {
				infile = fopen(optarg, "r");
				if (infile == NULL)
					fatal("%s (%s).", strerror(errno), optarg);
			} else
				fatal("Filename already specified.");
			break;
		case 'P':
			sftp_direct = optarg;
			break;
		case 'B':
			copy_buffer_len = strtol(optarg, &cp, 10);
			if (copy_buffer_len == 0 || *cp != '\0')
				fatal("Invalid buffer size \"%s\"", optarg);
			break;
		case 'R':
			num_requests = strtol(optarg, &cp, 10);
			if (num_requests == 0 || *cp != '\0')
				fatal("Invalid number of requests \"%s\"",
				    optarg);
			break;
		case 'h':
		default:
			usage();
		}
	}

	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);

	if (sftp_direct == NULL) {
		if (optind == argc || argc > (optind + 2))
			usage();

		userhost = xstrdup(argv[optind]);
		file2 = argv[optind+1];

		if ((cp = colon(userhost)) != NULL) {
			*cp++ = '\0';
			file1 = cp;
		}

		if ((host = strchr(userhost, '@')) == NULL)
			host = userhost;
		else {
			*host++ = '\0';
			if (!userhost[0]) {
				fprintf(stderr, "Missing username\n");
				usage();
			}
			addargs(&args, "-l%s",userhost);
		}

		host = cleanhostname(host);
		if (!*host) {
			fprintf(stderr, "Missing hostname\n");
			usage();
		}

		addargs(&args, "-oProtocol %d", sshver);

		/* no subsystem if the server-spec contains a '/' */
		if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
			addargs(&args, "-s");

		addargs(&args, "%s", host);
		addargs(&args, "%s", (sftp_server != NULL ?
		    sftp_server : "sftp"));
		args.list[0] = ssh_program;

		fprintf(stderr, "Connecting to %s...\n", host);
		connect_to_server(ssh_program, args.list, &in, &out,
		    &sshpid);
	} else {
		args.list = NULL;
		addargs(&args, "sftp-server");

		fprintf(stderr, "Attaching to %s...\n", sftp_direct);
		connect_to_server(sftp_direct, args.list, &in, &out,
		    &sshpid);
	}

	interactive_loop(in, out, file1, file2);

#if !defined(USE_PIPES)
	shutdown(in, SHUT_RDWR);
	shutdown(out, SHUT_RDWR);
#endif

	close(in);
	close(out);
	if (infile != stdin)
		fclose(infile);

	while (waitpid(sshpid, NULL, 0) == -1)
		if (errno != EINTR)
			fatal("Couldn't wait for ssh process: %s",
			    strerror(errno));

	exit(0);
}
Commit	Line	Data
61e96248	1	/*
a96fd7c2	2	* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
61e96248	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	16	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	23	*/
	24
	25	#include "includes.h"
	26
9906a836	27	RCSID("$OpenBSD: sftp.c,v 1.30 2002/06/23 09:30:14 deraadt Exp $");
61e96248	28
61e96248	29	/* XXX: short-form remote directory listings (like 'ls -C') */
	30
	31	#include "buffer.h"
	32	#include "xmalloc.h"
	33	#include "log.h"
	34	#include "pathnames.h"
1fcde3fe	35	#include "misc.h"
61e96248	36
	37	#include "sftp.h"
	38	#include "sftp-common.h"
	39	#include "sftp-client.h"
	40	#include "sftp-int.h"
	41
5152d46f	42	#ifdef HAVE___PROGNAME
	43	extern char *__progname;
	44	#else
	45	char *__progname;
	46	#endif
	47
a5ec8a3d	48	FILE* infile;
375f867e	49	size_t copy_buffer_len = 32768;
c25d3df7	50	size_t num_requests = 16;
0426a3b4	51
396c147e	52	static void
a96fd7c2	53	connect_to_server(char path, char args, int in, int out, pid_t sshpid)
61e96248	54	{
61e96248	55	int c_in, c_out;
9906a836	56
61e96248	57	#ifdef USE_PIPES
61e96248	58	int pin[2], pout[2];
9906a836	59
61e96248	60	if ((pipe(pin) == -1) \|\| (pipe(pout) == -1))
	61	fatal("pipe: %s", strerror(errno));
	62	*in = pin[0];
	63	*out = pout[1];
	64	c_in = pout[0];
	65	c_out = pin[1];
	66	#else /* USE_PIPES */
	67	int inout[2];
9906a836	68
61e96248	69	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
	70	fatal("socketpair: %s", strerror(errno));
	71	in = out = inout[0];
	72	c_in = c_out = inout[1];
	73	#endif /* USE_PIPES */
	74
	75	if ((*sshpid = fork()) == -1)
	76	fatal("fork: %s", strerror(errno));
	77	else if (*sshpid == 0) {
	78	if ((dup2(c_in, STDIN_FILENO) == -1) \|\|
	79	(dup2(c_out, STDOUT_FILENO) == -1)) {
	80	fprintf(stderr, "dup2: %s\n", strerror(errno));
	81	exit(1);
	82	}
	83	close(*in);
	84	close(*out);
	85	close(c_in);
	86	close(c_out);
a96fd7c2	87	execv(path, args);
a96fd7c2	88	fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
61e96248	89	exit(1);
	90	}
	91
	92	close(c_in);
	93	close(c_out);
	94	}
	95
396c147e	96	static void
61e96248	97	usage(void)
61e96248	98	{
22be05a5	99	extern char *__progname;
762715ce	100
f1278af7	101	fprintf(stderr,
22be05a5	102	"usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem\|path] [-B buffer_size]\n"
	103	" [-F config] [-P direct server path] [-S program]\n"
	104	" [user@]host[:file [file]]\n", __progname);
61e96248	105	exit(1);
	106	}
	107
2b87da3b	108	int
61e96248	109	main(int argc, char **argv)
61e96248	110	{
8a624ebf	111	int in, out, ch;
61e96248	112	pid_t sshpid;
edeeab1e	113	char host, userhost, cp, file2;
8a624ebf	114	int debug_level = 0, sshver = 2;
8a624ebf	115	char file1 = NULL, sftp_server = NULL;
a96fd7c2	116	char ssh_program = _PATH_SSH_PROGRAM, sftp_direct = NULL;
8a624ebf	117	LogLevel ll = SYSLOG_LEVEL_INFO;
8a624ebf	118	arglist args;
0426a3b4	119	extern int optind;
0426a3b4	120	extern char *optarg;
61e96248	121
5152d46f	122	__progname = get_progname(argv[0]);
8a624ebf	123	args.list = NULL;
184eed6a	124	addargs(&args, "ssh"); /* overwritten with ssh_program */
8a624ebf	125	addargs(&args, "-oFallBackToRsh no");
	126	addargs(&args, "-oForwardX11 no");
	127	addargs(&args, "-oForwardAgent no");
e1c5bfaf	128	addargs(&args, "-oClearAllForwardings yes");
8a624ebf	129	ll = SYSLOG_LEVEL_INFO;
8a624ebf	130	infile = stdin; /* Read from STDIN unless changed by -b */
0426a3b4	131
c25d3df7	132	while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
0426a3b4	133	switch (ch) {
0426a3b4	134	case 'C':
8a624ebf	135	addargs(&args, "-C");
0426a3b4	136	break;
0426a3b4	137	case 'v':
8a624ebf	138	if (debug_level < 3) {
	139	addargs(&args, "-v");
	140	ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
	141	}
	142	debug_level++;
0426a3b4	143	break;
f1278af7	144	case 'F':
0426a3b4	145	case 'o':
f1278af7	146	addargs(&args, "-%c%s", ch, optarg);
0426a3b4	147	break;
0426a3b4	148	case '1':
8a624ebf	149	sshver = 1;
0426a3b4	150	if (sftp_server == NULL)
	151	sftp_server = _PATH_SFTP_SERVER;
	152	break;
	153	case 's':
	154	sftp_server = optarg;
	155	break;
	156	case 'S':
	157	ssh_program = optarg;
	158	break;
a5ec8a3d	159	case 'b':
	160	if (infile == stdin) {
	161	infile = fopen(optarg, "r");
cd332296	162	if (infile == NULL)
a5ec8a3d	163	fatal("%s (%s).", strerror(errno), optarg);
cd332296	164	} else
a5ec8a3d	165	fatal("Filename already specified.");
a5ec8a3d	166	break;
a96fd7c2	167	case 'P':
	168	sftp_direct = optarg;
	169	break;
375f867e	170	case 'B':
	171	copy_buffer_len = strtol(optarg, &cp, 10);
	172	if (copy_buffer_len == 0 \|\| *cp != '\0')
	173	fatal("Invalid buffer size \"%s\"", optarg);
	174	break;
c25d3df7	175	case 'R':
	176	num_requests = strtol(optarg, &cp, 10);
	177	if (num_requests == 0 \|\| *cp != '\0')
762715ce	178	fatal("Invalid number of requests \"%s\"",
c25d3df7	179	optarg);
c25d3df7	180	break;
0426a3b4	181	case 'h':
0426a3b4	182	default:
61e96248	183	usage();
	184	}
	185	}
	186
b69145c2	187	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
b69145c2	188
a96fd7c2	189	if (sftp_direct == NULL) {
	190	if (optind == argc \|\| argc > (optind + 2))
	191	usage();
61e96248	192
a96fd7c2	193	userhost = xstrdup(argv[optind]);
a96fd7c2	194	file2 = argv[optind+1];
edeeab1e	195
a96fd7c2	196	if ((cp = colon(userhost)) != NULL) {
	197	*cp++ = '\0';
	198	file1 = cp;
	199	}
0426a3b4	200
a96fd7c2	201	if ((host = strchr(userhost, '@')) == NULL)
	202	host = userhost;
	203	else {
	204	*host++ = '\0';
	205	if (!userhost[0]) {
	206	fprintf(stderr, "Missing username\n");
	207	usage();
	208	}
	209	addargs(&args, "-l%s",userhost);
61e96248	210	}
61e96248	211
a96fd7c2	212	host = cleanhostname(host);
	213	if (!*host) {
	214	fprintf(stderr, "Missing hostname\n");
	215	usage();
	216	}
61e96248	217
a96fd7c2	218	addargs(&args, "-oProtocol %d", sshver);
8a624ebf	219
a96fd7c2	220	/* no subsystem if the server-spec contains a '/' */
	221	if (sftp_server == NULL \|\| strchr(sftp_server, '/') == NULL)
	222	addargs(&args, "-s");
61e96248	223
a96fd7c2	224	addargs(&args, "%s", host);
762715ce	225	addargs(&args, "%s", (sftp_server != NULL ?
a96fd7c2	226	sftp_server : "sftp"));
a96fd7c2	227	args.list[0] = ssh_program;
61e96248	228
a96fd7c2	229	fprintf(stderr, "Connecting to %s...\n", host);
762715ce	230	connect_to_server(ssh_program, args.list, &in, &out,
a96fd7c2	231	&sshpid);
	232	} else {
	233	args.list = NULL;
	234	addargs(&args, "sftp-server");
61e96248	235
a96fd7c2	236	fprintf(stderr, "Attaching to %s...\n", sftp_direct);
762715ce	237	connect_to_server(sftp_direct, args.list, &in, &out,
a96fd7c2	238	&sshpid);
a96fd7c2	239	}
61e96248	240
edeeab1e	241	interactive_loop(in, out, file1, file2);
61e96248	242
51fb577a	243	#if !defined(USE_PIPES)
875ec275	244	shutdown(in, SHUT_RDWR);
875ec275	245	shutdown(out, SHUT_RDWR);
51fb577a	246	#endif
51fb577a	247
61e96248	248	close(in);
61e96248	249	close(out);
a5ec8a3d	250	if (infile != stdin)
a5ec8a3d	251	fclose(infile);
61e96248	252
8c38e88b	253	while (waitpid(sshpid, NULL, 0) == -1)
	254	if (errno != EINTR)
	255	fatal("Couldn't wait for ssh process: %s",
	256	strerror(errno));
61e96248	257
	258	exit(0);
	259	}