[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 1.38 2003/10/08 08:27:36 jmc Exp $");

#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 pid_t sshpid = -1;

extern int showprogress;

static void
killchild(int signo)
{
	if (sshpid > 1)
		kill(sshpid, signo);

	_exit(1);
}

static void
connect_to_server(char *path, char **args, int *in, int *out)
{
	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);
	}

	signal(SIGTERM, killchild);
	signal(SIGINT, killchild);
	signal(SIGHUP, killchild);
	close(c_in);
	close(c_out);
}

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

	fprintf(stderr,
	    "usage: %s [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n"
	    "            [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n"
	    "            [-S program] [-s subsystem | sftp_server] host\n"
	    "       %s [[user@]host[:file [file]]]\n"
	    "       %s [[user@]host[:dir[/]]]\n"
	    "       %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname);
	exit(1);
}

int
main(int argc, char **argv)
{
	int in, out, ch, err;
	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 = ssh_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);
	} 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);
	}

	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
12408a1b	27	RCSID("$OpenBSD: sftp.c,v 1.38 2003/10/08 08:27:36 jmc Exp $");
3c0ef626	28
	29	#include "buffer.h"
	30	#include "xmalloc.h"
	31	#include "log.h"
	32	#include "pathnames.h"
	33	#include "misc.h"
	34
	35	#include "sftp.h"
	36	#include "sftp-common.h"
	37	#include "sftp-client.h"
	38	#include "sftp-int.h"
	39
	40	#ifdef HAVE___PROGNAME
	41	extern char *__progname;
	42	#else
	43	char *__progname;
	44	#endif
	45
3c0ef626	46	FILE* infile;
e9a17296	47	size_t copy_buffer_len = 32768;
e9a17296	48	size_t num_requests = 16;
0fff78ff	49	static pid_t sshpid = -1;
3c0ef626	50
6a9b3198	51	extern int showprogress;
6a9b3198	52
3c0ef626	53	static void
0fff78ff	54	killchild(int signo)
	55	{
	56	if (sshpid > 1)
	57	kill(sshpid, signo);
	58
	59	_exit(1);
	60	}
	61
	62	static void
	63	connect_to_server(char path, char args, int in, int *out)
3c0ef626	64	{
3c0ef626	65	int c_in, c_out;
680cee3b	66
3c0ef626	67	#ifdef USE_PIPES
3c0ef626	68	int pin[2], pout[2];
680cee3b	69
3c0ef626	70	if ((pipe(pin) == -1) \|\| (pipe(pout) == -1))
	71	fatal("pipe: %s", strerror(errno));
	72	*in = pin[0];
	73	*out = pout[1];
	74	c_in = pout[0];
	75	c_out = pin[1];
	76	#else /* USE_PIPES */
	77	int inout[2];
680cee3b	78
3c0ef626	79	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
	80	fatal("socketpair: %s", strerror(errno));
	81	in = out = inout[0];
	82	c_in = c_out = inout[1];
	83	#endif /* USE_PIPES */
	84
0fff78ff	85	if ((sshpid = fork()) == -1)
3c0ef626	86	fatal("fork: %s", strerror(errno));
0fff78ff	87	else if (sshpid == 0) {
3c0ef626	88	if ((dup2(c_in, STDIN_FILENO) == -1) \|\|
	89	(dup2(c_out, STDOUT_FILENO) == -1)) {
	90	fprintf(stderr, "dup2: %s\n", strerror(errno));
	91	exit(1);
	92	}
	93	close(*in);
	94	close(*out);
	95	close(c_in);
	96	close(c_out);
e9a17296	97	execv(path, args);
e9a17296	98	fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
3c0ef626	99	exit(1);
	100	}
	101
0fff78ff	102	signal(SIGTERM, killchild);
	103	signal(SIGINT, killchild);
	104	signal(SIGHUP, killchild);
3c0ef626	105	close(c_in);
	106	close(c_out);
	107	}
	108
	109	static void
	110	usage(void)
	111	{
e9a17296	112	extern char *__progname;
700318f3	113
3c0ef626	114	fprintf(stderr,
12408a1b	115	"usage: %s [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n"
	116	" [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n"
	117	" [-S program] [-s subsystem \| sftp_server] host\n"
	118	" %s [[user@]host[:file [file]]]\n"
	119	" %s [[user@]host[:dir[/]]]\n"
	120	" %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname);
3c0ef626	121	exit(1);
	122	}
	123
	124	int
	125	main(int argc, char **argv)
	126	{
6a9b3198	127	int in, out, ch, err;
3c0ef626	128	char host, userhost, cp, file2;
	129	int debug_level = 0, sshver = 2;
	130	char file1 = NULL, sftp_server = NULL;
e9a17296	131	char ssh_program = _PATH_SSH_PROGRAM, sftp_direct = NULL;
3c0ef626	132	LogLevel ll = SYSLOG_LEVEL_INFO;
	133	arglist args;
	134	extern int optind;
	135	extern char *optarg;
	136
0fff78ff	137	__progname = ssh_get_progname(argv[0]);
3c0ef626	138	args.list = NULL;
e9a17296	139	addargs(&args, "ssh"); /* overwritten with ssh_program */
3c0ef626	140	addargs(&args, "-oForwardX11 no");
	141	addargs(&args, "-oForwardAgent no");
	142	addargs(&args, "-oClearAllForwardings yes");
	143	ll = SYSLOG_LEVEL_INFO;
	144	infile = stdin; /* Read from STDIN unless changed by -b */
	145
e9a17296	146	while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
3c0ef626	147	switch (ch) {
	148	case 'C':
	149	addargs(&args, "-C");
	150	break;
	151	case 'v':
	152	if (debug_level < 3) {
	153	addargs(&args, "-v");
	154	ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
	155	}
	156	debug_level++;
	157	break;
	158	case 'F':
	159	case 'o':
	160	addargs(&args, "-%c%s", ch, optarg);
	161	break;
	162	case '1':
	163	sshver = 1;
	164	if (sftp_server == NULL)
	165	sftp_server = _PATH_SFTP_SERVER;
	166	break;
	167	case 's':
	168	sftp_server = optarg;
	169	break;
	170	case 'S':
	171	ssh_program = optarg;
	172	break;
	173	case 'b':
	174	if (infile == stdin) {
	175	infile = fopen(optarg, "r");
	176	if (infile == NULL)
	177	fatal("%s (%s).", strerror(errno), optarg);
	178	} else
	179	fatal("Filename already specified.");
6a9b3198	180	showprogress = 0;
3c0ef626	181	break;
e9a17296	182	case 'P':
	183	sftp_direct = optarg;
	184	break;
	185	case 'B':
	186	copy_buffer_len = strtol(optarg, &cp, 10);
	187	if (copy_buffer_len == 0 \|\| *cp != '\0')
	188	fatal("Invalid buffer size \"%s\"", optarg);
	189	break;
	190	case 'R':
	191	num_requests = strtol(optarg, &cp, 10);
	192	if (num_requests == 0 \|\| *cp != '\0')
700318f3	193	fatal("Invalid number of requests \"%s\"",
e9a17296	194	optarg);
e9a17296	195	break;
3c0ef626	196	case 'h':
	197	default:
	198	usage();
	199	}
	200	}
	201
700318f3	202	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
700318f3	203
e9a17296	204	if (sftp_direct == NULL) {
	205	if (optind == argc \|\| argc > (optind + 2))
	206	usage();
3c0ef626	207
e9a17296	208	userhost = xstrdup(argv[optind]);
e9a17296	209	file2 = argv[optind+1];
3c0ef626	210
e9a17296	211	if ((cp = colon(userhost)) != NULL) {
	212	*cp++ = '\0';
	213	file1 = cp;
	214	}
3c0ef626	215
6a9b3198	216	if ((host = strrchr(userhost, '@')) == NULL)
e9a17296	217	host = userhost;
	218	else {
	219	*host++ = '\0';
	220	if (!userhost[0]) {
	221	fprintf(stderr, "Missing username\n");
	222	usage();
	223	}
	224	addargs(&args, "-l%s",userhost);
3c0ef626	225	}
3c0ef626	226
e9a17296	227	host = cleanhostname(host);
	228	if (!*host) {
	229	fprintf(stderr, "Missing hostname\n");
	230	usage();
	231	}
3c0ef626	232
e9a17296	233	addargs(&args, "-oProtocol %d", sshver);
3c0ef626	234
e9a17296	235	/* no subsystem if the server-spec contains a '/' */
	236	if (sftp_server == NULL \|\| strchr(sftp_server, '/') == NULL)
	237	addargs(&args, "-s");
3c0ef626	238
e9a17296	239	addargs(&args, "%s", host);
700318f3	240	addargs(&args, "%s", (sftp_server != NULL ?
e9a17296	241	sftp_server : "sftp"));
e9a17296	242	args.list[0] = ssh_program;
3c0ef626	243
e9a17296	244	fprintf(stderr, "Connecting to %s...\n", host);
0fff78ff	245	connect_to_server(ssh_program, args.list, &in, &out);
e9a17296	246	} else {
	247	args.list = NULL;
	248	addargs(&args, "sftp-server");
3c0ef626	249
e9a17296	250	fprintf(stderr, "Attaching to %s...\n", sftp_direct);
0fff78ff	251	connect_to_server(sftp_direct, args.list, &in, &out);
e9a17296	252	}
3c0ef626	253
6a9b3198	254	err = interactive_loop(in, out, file1, file2);
3c0ef626	255
3c0ef626	256	#if !defined(USE_PIPES)
f5799ae1	257	shutdown(in, SHUT_RDWR);
f5799ae1	258	shutdown(out, SHUT_RDWR);
3c0ef626	259	#endif
	260
	261	close(in);
	262	close(out);
	263	if (infile != stdin)
	264	fclose(infile);
	265
700318f3	266	while (waitpid(sshpid, NULL, 0) == -1)
	267	if (errno != EINTR)
	268	fatal("Couldn't wait for ssh process: %s",
	269	strerror(errno));
3c0ef626	270
6a9b3198	271	exit(err == 0 ? 0 : 1);
3c0ef626	272	}