[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 1.24 2002/02/05 00:00:46 djm 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;

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)
{
	fprintf(stderr,
	    "usage: sftp [-1Cv] [-b batchfile] [-F config] [-o option] [-s subsystem|path]\n"
	    "            [-P direct server path] [-S program] \n"
	    "            [-B buffer_size] [user@]host[:file [file]]\n");
	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:")) != -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 'h':
		default:
			usage();
		}
	}

	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();
		}

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

	if (waitpid(sshpid, NULL, 0) == -1)
		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
375f867e	27	RCSID("$OpenBSD: sftp.c,v 1.24 2002/02/05 00:00:46 djm 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;
0426a3b4	50
396c147e	51	static void
a96fd7c2	52	connect_to_server(char path, char args, int in, int out, pid_t sshpid)
61e96248	53	{
	54	int c_in, c_out;
	55	#ifdef USE_PIPES
	56	int pin[2], pout[2];
	57	if ((pipe(pin) == -1) \|\| (pipe(pout) == -1))
	58	fatal("pipe: %s", strerror(errno));
	59	*in = pin[0];
	60	*out = pout[1];
	61	c_in = pout[0];
	62	c_out = pin[1];
	63	#else /* USE_PIPES */
	64	int inout[2];
	65	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
	66	fatal("socketpair: %s", strerror(errno));
	67	in = out = inout[0];
	68	c_in = c_out = inout[1];
	69	#endif /* USE_PIPES */
	70
	71	if ((*sshpid = fork()) == -1)
	72	fatal("fork: %s", strerror(errno));
	73	else if (*sshpid == 0) {
	74	if ((dup2(c_in, STDIN_FILENO) == -1) \|\|
	75	(dup2(c_out, STDOUT_FILENO) == -1)) {
	76	fprintf(stderr, "dup2: %s\n", strerror(errno));
	77	exit(1);
	78	}
	79	close(*in);
	80	close(*out);
	81	close(c_in);
	82	close(c_out);
a96fd7c2	83	execv(path, args);
a96fd7c2	84	fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
61e96248	85	exit(1);
	86	}
	87
	88	close(c_in);
	89	close(c_out);
	90	}
	91
396c147e	92	static void
61e96248	93	usage(void)
61e96248	94	{
f1278af7	95	fprintf(stderr,
e3c1c3e6	96	"usage: sftp [-1Cv] [-b batchfile] [-F config] [-o option] [-s subsystem\|path]\n"
375f867e	97	" [-P direct server path] [-S program] \n"
375f867e	98	" [-B buffer_size] [user@]host[:file [file]]\n");
61e96248	99	exit(1);
	100	}
	101
2b87da3b	102	int
61e96248	103	main(int argc, char **argv)
61e96248	104	{
8a624ebf	105	int in, out, ch;
61e96248	106	pid_t sshpid;
edeeab1e	107	char host, userhost, cp, file2;
8a624ebf	108	int debug_level = 0, sshver = 2;
8a624ebf	109	char file1 = NULL, sftp_server = NULL;
a96fd7c2	110	char ssh_program = _PATH_SSH_PROGRAM, sftp_direct = NULL;
8a624ebf	111	LogLevel ll = SYSLOG_LEVEL_INFO;
8a624ebf	112	arglist args;
0426a3b4	113	extern int optind;
0426a3b4	114	extern char *optarg;
61e96248	115
5152d46f	116	__progname = get_progname(argv[0]);
8a624ebf	117	args.list = NULL;
184eed6a	118	addargs(&args, "ssh"); /* overwritten with ssh_program */
8a624ebf	119	addargs(&args, "-oFallBackToRsh no");
	120	addargs(&args, "-oForwardX11 no");
	121	addargs(&args, "-oForwardAgent no");
e1c5bfaf	122	addargs(&args, "-oClearAllForwardings yes");
8a624ebf	123	ll = SYSLOG_LEVEL_INFO;
8a624ebf	124	infile = stdin; /* Read from STDIN unless changed by -b */
0426a3b4	125
375f867e	126	while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:")) != -1) {
0426a3b4	127	switch (ch) {
0426a3b4	128	case 'C':
8a624ebf	129	addargs(&args, "-C");
0426a3b4	130	break;
0426a3b4	131	case 'v':
8a624ebf	132	if (debug_level < 3) {
	133	addargs(&args, "-v");
	134	ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
	135	}
	136	debug_level++;
0426a3b4	137	break;
f1278af7	138	case 'F':
0426a3b4	139	case 'o':
f1278af7	140	addargs(&args, "-%c%s", ch, optarg);
0426a3b4	141	break;
0426a3b4	142	case '1':
8a624ebf	143	sshver = 1;
0426a3b4	144	if (sftp_server == NULL)
	145	sftp_server = _PATH_SFTP_SERVER;
	146	break;
	147	case 's':
	148	sftp_server = optarg;
	149	break;
	150	case 'S':
	151	ssh_program = optarg;
	152	break;
a5ec8a3d	153	case 'b':
	154	if (infile == stdin) {
	155	infile = fopen(optarg, "r");
cd332296	156	if (infile == NULL)
a5ec8a3d	157	fatal("%s (%s).", strerror(errno), optarg);
cd332296	158	} else
a5ec8a3d	159	fatal("Filename already specified.");
a5ec8a3d	160	break;
a96fd7c2	161	case 'P':
	162	sftp_direct = optarg;
	163	break;
375f867e	164	case 'B':
	165	copy_buffer_len = strtol(optarg, &cp, 10);
	166	if (copy_buffer_len == 0 \|\| *cp != '\0')
	167	fatal("Invalid buffer size \"%s\"", optarg);
	168	break;
0426a3b4	169	case 'h':
0426a3b4	170	default:
61e96248	171	usage();
	172	}
	173	}
	174
a96fd7c2	175	if (sftp_direct == NULL) {
	176	if (optind == argc \|\| argc > (optind + 2))
	177	usage();
61e96248	178
a96fd7c2	179	userhost = xstrdup(argv[optind]);
a96fd7c2	180	file2 = argv[optind+1];
edeeab1e	181
a96fd7c2	182	if ((cp = colon(userhost)) != NULL) {
	183	*cp++ = '\0';
	184	file1 = cp;
	185	}
0426a3b4	186
a96fd7c2	187	if ((host = strchr(userhost, '@')) == NULL)
	188	host = userhost;
	189	else {
	190	*host++ = '\0';
	191	if (!userhost[0]) {
	192	fprintf(stderr, "Missing username\n");
	193	usage();
	194	}
	195	addargs(&args, "-l%s",userhost);
61e96248	196	}
61e96248	197
a96fd7c2	198	host = cleanhostname(host);
	199	if (!*host) {
	200	fprintf(stderr, "Missing hostname\n");
	201	usage();
	202	}
61e96248	203
a96fd7c2	204	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
a96fd7c2	205	addargs(&args, "-oProtocol %d", sshver);
8a624ebf	206
a96fd7c2	207	/* no subsystem if the server-spec contains a '/' */
	208	if (sftp_server == NULL \|\| strchr(sftp_server, '/') == NULL)
	209	addargs(&args, "-s");
61e96248	210
a96fd7c2	211	addargs(&args, "%s", host);
	212	addargs(&args, "%s", (sftp_server != NULL ?
	213	sftp_server : "sftp"));
	214	args.list[0] = ssh_program;
61e96248	215
a96fd7c2	216	fprintf(stderr, "Connecting to %s...\n", host);
	217	connect_to_server(ssh_program, args.list, &in, &out,
	218	&sshpid);
	219	} else {
	220	args.list = NULL;
	221	addargs(&args, "sftp-server");
61e96248	222
a96fd7c2	223	fprintf(stderr, "Attaching to %s...\n", sftp_direct);
	224	connect_to_server(sftp_direct, args.list, &in, &out,
	225	&sshpid);
	226	}
61e96248	227
edeeab1e	228	interactive_loop(in, out, file1, file2);
61e96248	229
51fb577a	230	#if !defined(USE_PIPES)
	231	shutdown(in, SHUT_RDWR);
	232	shutdown(out, SHUT_RDWR);
	233	#endif
	234
61e96248	235	close(in);
61e96248	236	close(out);
a5ec8a3d	237	if (infile != stdin)
a5ec8a3d	238	fclose(infile);
61e96248	239
0426a3b4	240	if (waitpid(sshpid, NULL, 0) == -1)
0426a3b4	241	fatal("Couldn't wait for ssh process: %s", strerror(errno));
61e96248	242
	243	exit(0);
	244	}