[gssapi-openssh.git] / openssh / 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 1.34 2003/01/10 08:19:07 fgsch 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;

extern int showprogress;

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, err;
	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, "-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.");
			showprogress = 0;
			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 = strrchr(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);
	}

	err = 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(err == 0 ? 0 : 1);
}
Commit	Line	Data
3c0ef626	1	/*
e9a17296	2	* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
3c0ef626	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
6a9b3198	27	RCSID("$OpenBSD: sftp.c,v 1.34 2003/01/10 08:19:07 fgsch Exp $");
3c0ef626	28
3c0ef626	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"
	35	#include "misc.h"
	36
	37	#include "sftp.h"
	38	#include "sftp-common.h"
	39	#include "sftp-client.h"
	40	#include "sftp-int.h"
	41
	42	#ifdef HAVE___PROGNAME
	43	extern char *__progname;
	44	#else
	45	char *__progname;
	46	#endif
	47
3c0ef626	48	FILE* infile;
e9a17296	49	size_t copy_buffer_len = 32768;
e9a17296	50	size_t num_requests = 16;
3c0ef626	51
6a9b3198	52	extern int showprogress;
6a9b3198	53
3c0ef626	54	static void
e9a17296	55	connect_to_server(char path, char args, int in, int out, pid_t sshpid)
3c0ef626	56	{
3c0ef626	57	int c_in, c_out;
680cee3b	58
3c0ef626	59	#ifdef USE_PIPES
3c0ef626	60	int pin[2], pout[2];
680cee3b	61
3c0ef626	62	if ((pipe(pin) == -1) \|\| (pipe(pout) == -1))
	63	fatal("pipe: %s", strerror(errno));
	64	*in = pin[0];
	65	*out = pout[1];
	66	c_in = pout[0];
	67	c_out = pin[1];
	68	#else /* USE_PIPES */
	69	int inout[2];
680cee3b	70
3c0ef626	71	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
	72	fatal("socketpair: %s", strerror(errno));
	73	in = out = inout[0];
	74	c_in = c_out = inout[1];
	75	#endif /* USE_PIPES */
	76
	77	if ((*sshpid = fork()) == -1)
	78	fatal("fork: %s", strerror(errno));
	79	else if (*sshpid == 0) {
	80	if ((dup2(c_in, STDIN_FILENO) == -1) \|\|
	81	(dup2(c_out, STDOUT_FILENO) == -1)) {
	82	fprintf(stderr, "dup2: %s\n", strerror(errno));
	83	exit(1);
	84	}
	85	close(*in);
	86	close(*out);
	87	close(c_in);
	88	close(c_out);
e9a17296	89	execv(path, args);
e9a17296	90	fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
3c0ef626	91	exit(1);
	92	}
	93
	94	close(c_in);
	95	close(c_out);
	96	}
	97
	98	static void
	99	usage(void)
	100	{
e9a17296	101	extern char *__progname;
700318f3	102
3c0ef626	103	fprintf(stderr,
e9a17296	104	"usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem\|path] [-B buffer_size]\n"
	105	" [-F config] [-P direct server path] [-S program]\n"
	106	" [user@]host[:file [file]]\n", __progname);
3c0ef626	107	exit(1);
	108	}
	109
	110	int
	111	main(int argc, char **argv)
	112	{
6a9b3198	113	int in, out, ch, err;
3c0ef626	114	pid_t sshpid;
	115	char host, userhost, cp, file2;
	116	int debug_level = 0, sshver = 2;
	117	char file1 = NULL, sftp_server = NULL;
e9a17296	118	char ssh_program = _PATH_SSH_PROGRAM, sftp_direct = NULL;
3c0ef626	119	LogLevel ll = SYSLOG_LEVEL_INFO;
	120	arglist args;
	121	extern int optind;
	122	extern char *optarg;
	123
	124	__progname = get_progname(argv[0]);
	125	args.list = NULL;
e9a17296	126	addargs(&args, "ssh"); /* overwritten with ssh_program */
3c0ef626	127	addargs(&args, "-oForwardX11 no");
	128	addargs(&args, "-oForwardAgent no");
	129	addargs(&args, "-oClearAllForwardings yes");
	130	ll = SYSLOG_LEVEL_INFO;
	131	infile = stdin; /* Read from STDIN unless changed by -b */
	132
e9a17296	133	while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
3c0ef626	134	switch (ch) {
	135	case 'C':
	136	addargs(&args, "-C");
	137	break;
	138	case 'v':
	139	if (debug_level < 3) {
	140	addargs(&args, "-v");
	141	ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
	142	}
	143	debug_level++;
	144	break;
	145	case 'F':
	146	case 'o':
	147	addargs(&args, "-%c%s", ch, optarg);
	148	break;
	149	case '1':
	150	sshver = 1;
	151	if (sftp_server == NULL)
	152	sftp_server = _PATH_SFTP_SERVER;
	153	break;
	154	case 's':
	155	sftp_server = optarg;
	156	break;
	157	case 'S':
	158	ssh_program = optarg;
	159	break;
	160	case 'b':
	161	if (infile == stdin) {
	162	infile = fopen(optarg, "r");
	163	if (infile == NULL)
	164	fatal("%s (%s).", strerror(errno), optarg);
	165	} else
	166	fatal("Filename already specified.");
6a9b3198	167	showprogress = 0;
3c0ef626	168	break;
e9a17296	169	case 'P':
	170	sftp_direct = optarg;
	171	break;
	172	case 'B':
	173	copy_buffer_len = strtol(optarg, &cp, 10);
	174	if (copy_buffer_len == 0 \|\| *cp != '\0')
	175	fatal("Invalid buffer size \"%s\"", optarg);
	176	break;
	177	case 'R':
	178	num_requests = strtol(optarg, &cp, 10);
	179	if (num_requests == 0 \|\| *cp != '\0')
700318f3	180	fatal("Invalid number of requests \"%s\"",
e9a17296	181	optarg);
e9a17296	182	break;
3c0ef626	183	case 'h':
	184	default:
	185	usage();
	186	}
	187	}
	188
700318f3	189	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
700318f3	190
e9a17296	191	if (sftp_direct == NULL) {
	192	if (optind == argc \|\| argc > (optind + 2))
	193	usage();
3c0ef626	194
e9a17296	195	userhost = xstrdup(argv[optind]);
e9a17296	196	file2 = argv[optind+1];
3c0ef626	197
e9a17296	198	if ((cp = colon(userhost)) != NULL) {
	199	*cp++ = '\0';
	200	file1 = cp;
	201	}
3c0ef626	202
6a9b3198	203	if ((host = strrchr(userhost, '@')) == NULL)
e9a17296	204	host = userhost;
	205	else {
	206	*host++ = '\0';
	207	if (!userhost[0]) {
	208	fprintf(stderr, "Missing username\n");
	209	usage();
	210	}
	211	addargs(&args, "-l%s",userhost);
3c0ef626	212	}
3c0ef626	213
e9a17296	214	host = cleanhostname(host);
	215	if (!*host) {
	216	fprintf(stderr, "Missing hostname\n");
	217	usage();
	218	}
3c0ef626	219
e9a17296	220	addargs(&args, "-oProtocol %d", sshver);
3c0ef626	221
e9a17296	222	/* no subsystem if the server-spec contains a '/' */
	223	if (sftp_server == NULL \|\| strchr(sftp_server, '/') == NULL)
	224	addargs(&args, "-s");
3c0ef626	225
e9a17296	226	addargs(&args, "%s", host);
700318f3	227	addargs(&args, "%s", (sftp_server != NULL ?
e9a17296	228	sftp_server : "sftp"));
e9a17296	229	args.list[0] = ssh_program;
3c0ef626	230
e9a17296	231	fprintf(stderr, "Connecting to %s...\n", host);
700318f3	232	connect_to_server(ssh_program, args.list, &in, &out,
e9a17296	233	&sshpid);
	234	} else {
	235	args.list = NULL;
	236	addargs(&args, "sftp-server");
3c0ef626	237
e9a17296	238	fprintf(stderr, "Attaching to %s...\n", sftp_direct);
700318f3	239	connect_to_server(sftp_direct, args.list, &in, &out,
e9a17296	240	&sshpid);
e9a17296	241	}
3c0ef626	242
6a9b3198	243	err = interactive_loop(in, out, file1, file2);
3c0ef626	244
3c0ef626	245	#if !defined(USE_PIPES)
f5799ae1	246	shutdown(in, SHUT_RDWR);
f5799ae1	247	shutdown(out, SHUT_RDWR);
3c0ef626	248	#endif
	249
	250	close(in);
	251	close(out);
	252	if (infile != stdin)
	253	fclose(infile);
	254
700318f3	255	while (waitpid(sshpid, NULL, 0) == -1)
	256	if (errno != EINTR)
	257	fatal("Couldn't wait for ssh process: %s",
	258	strerror(errno));
3c0ef626	259
6a9b3198	260	exit(err == 0 ? 0 : 1);
3c0ef626	261	}