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Damien Miller33804262001-02-04 23:20:18 +11001/*
2 * Copyright (c) 2001 Damien Miller. All rights reserved.
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
Damien Millerd7686fd2001-02-10 00:40:03 +110027RCSID("$OpenBSD: sftp.c,v 1.7 2001/02/08 00:04:52 markus Exp $");
Damien Miller33804262001-02-04 23:20:18 +110028
29/* XXX: commandline mode */
30/* XXX: copy between two remote hosts (commandline) */
31/* XXX: short-form remote directory listings (like 'ls -C') */
32
33#include "buffer.h"
34#include "xmalloc.h"
35#include "log.h"
36#include "pathnames.h"
37
38#include "sftp.h"
39#include "sftp-common.h"
40#include "sftp-client.h"
41#include "sftp-int.h"
42
Damien Millerd7686fd2001-02-10 00:40:03 +110043int use_ssh1 = 0;
44char *ssh_program = _PATH_SSH_PROGRAM;
45char *sftp_server = NULL;
46
Damien Miller33804262001-02-04 23:20:18 +110047void
48connect_to_server(char **args, int *in, int *out, pid_t *sshpid)
49{
50 int c_in, c_out;
51#ifdef USE_PIPES
52 int pin[2], pout[2];
53 if ((pipe(pin) == -1) || (pipe(pout) == -1))
54 fatal("pipe: %s", strerror(errno));
55 *in = pin[0];
56 *out = pout[1];
57 c_in = pout[0];
58 c_out = pin[1];
59#else /* USE_PIPES */
60 int inout[2];
61 if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
62 fatal("socketpair: %s", strerror(errno));
63 *in = *out = inout[0];
64 c_in = c_out = inout[1];
65#endif /* USE_PIPES */
66
67 if ((*sshpid = fork()) == -1)
68 fatal("fork: %s", strerror(errno));
69 else if (*sshpid == 0) {
70 if ((dup2(c_in, STDIN_FILENO) == -1) ||
71 (dup2(c_out, STDOUT_FILENO) == -1)) {
72 fprintf(stderr, "dup2: %s\n", strerror(errno));
73 exit(1);
74 }
75 close(*in);
76 close(*out);
77 close(c_in);
78 close(c_out);
Damien Millerd7686fd2001-02-10 00:40:03 +110079 execv(ssh_program, args);
80 fprintf(stderr, "exec: %s: %s\n", ssh_program, strerror(errno));
Damien Miller33804262001-02-04 23:20:18 +110081 exit(1);
82 }
83
84 close(c_in);
85 close(c_out);
86}
87
88char **
89make_ssh_args(char *add_arg)
90{
91 static char **args = NULL;
92 static int nargs = 0;
93 char debug_buf[4096];
Damien Millerd7686fd2001-02-10 00:40:03 +110094 int i, use_subsystem = 1;
95
96 /* no subsystem if protocol 1 or the server-spec contains a '/' */
97 if (use_ssh1 ||
98 (sftp_server != NULL && strchr(sftp_server, '/') != NULL))
99 use_subsystem = 0;
Damien Miller33804262001-02-04 23:20:18 +1100100
101 /* Init args array */
102 if (args == NULL) {
Damien Millerd7686fd2001-02-10 00:40:03 +1100103 nargs = use_subsystem ? 6 : 5;
Damien Miller33804262001-02-04 23:20:18 +1100104 i = 0;
105 args = xmalloc(sizeof(*args) * nargs);
106 args[i++] = "ssh";
Damien Millerd7686fd2001-02-10 00:40:03 +1100107 args[i++] = use_ssh1 ? "-oProtocol=1" : "-oProtocol=2";
108 if (use_subsystem)
109 args[i++] = "-s";
110 args[i++] = "-oForwardAgent=no";
111 args[i++] = "-oForwardX11=no";
Damien Miller33804262001-02-04 23:20:18 +1100112 args[i++] = NULL;
113 }
114
115 /* If asked to add args, then do so and return */
116 if (add_arg) {
117 i = nargs++ - 1;
118 args = xrealloc(args, sizeof(*args) * nargs);
119 args[i++] = add_arg;
120 args[i++] = NULL;
121 return(NULL);
122 }
123
124 /* Otherwise finish up and return the arg array */
Damien Millerd7686fd2001-02-10 00:40:03 +1100125 if (sftp_server != NULL)
126 make_ssh_args(sftp_server);
127 else
128 make_ssh_args("sftp");
Damien Miller33804262001-02-04 23:20:18 +1100129
130 /* XXX: overflow - doesn't grow debug_buf */
131 debug_buf[0] = '\0';
132 for(i = 0; args[i]; i++) {
133 if (i)
134 strlcat(debug_buf, " ", sizeof(debug_buf));
135
136 strlcat(debug_buf, args[i], sizeof(debug_buf));
137 }
138 debug("SSH args \"%s\"", debug_buf);
139
140 return(args);
141}
142
Kevin Stevesef4eea92001-02-05 12:42:17 +0000143void
Damien Miller33804262001-02-04 23:20:18 +1100144usage(void)
145{
Damien Millerd7686fd2001-02-10 00:40:03 +1100146 fprintf(stderr, "usage: sftp [-1vC] [-osshopt=value] [user@]host\n");
Damien Miller33804262001-02-04 23:20:18 +1100147 exit(1);
148}
149
Kevin Stevesef4eea92001-02-05 12:42:17 +0000150int
Damien Miller33804262001-02-04 23:20:18 +1100151main(int argc, char **argv)
152{
Damien Millerd7686fd2001-02-10 00:40:03 +1100153 int in, out, ch, debug_level, compress_flag;
Damien Miller33804262001-02-04 23:20:18 +1100154 pid_t sshpid;
Damien Millerd7686fd2001-02-10 00:40:03 +1100155 char *host, *userhost;
Damien Miller33804262001-02-04 23:20:18 +1100156 LogLevel ll;
Damien Millerd7686fd2001-02-10 00:40:03 +1100157 extern int optind;
158 extern char *optarg;
Damien Miller33804262001-02-04 23:20:18 +1100159
160 debug_level = compress_flag = 0;
Damien Millerd7686fd2001-02-10 00:40:03 +1100161
162 while ((ch = getopt(argc, argv, "1hvCo:s:S:")) != -1) {
163 switch (ch) {
164 case 'C':
Damien Miller33804262001-02-04 23:20:18 +1100165 compress_flag = 1;
Damien Millerd7686fd2001-02-10 00:40:03 +1100166 break;
167 case 'v':
168 debug_level = MIN(3, debug_level + 1);
169 break;
170 case 'o':
171 make_ssh_args("-o");
172 make_ssh_args(optarg);
173 break;
174 case '1':
175 use_ssh1 = 1;
176 if (sftp_server == NULL)
177 sftp_server = _PATH_SFTP_SERVER;
178 break;
179 case 's':
180 sftp_server = optarg;
181 break;
182 case 'S':
183 ssh_program = optarg;
184 break;
185 case 'h':
186 default:
Damien Miller33804262001-02-04 23:20:18 +1100187 usage();
188 }
189 }
190
Damien Millerd7686fd2001-02-10 00:40:03 +1100191 if (optind == argc || argc > (optind + 1))
Damien Miller33804262001-02-04 23:20:18 +1100192 usage();
193
Damien Millerd7686fd2001-02-10 00:40:03 +1100194 userhost = argv[optind];
195
196 if ((host = strchr(userhost, '@')) == NULL)
197 host = userhost;
Damien Miller33804262001-02-04 23:20:18 +1100198 else {
Damien Millerd7686fd2001-02-10 00:40:03 +1100199 *host = '\0';
200 if (!userhost[0]) {
Damien Miller33804262001-02-04 23:20:18 +1100201 fprintf(stderr, "Missing username\n");
202 usage();
203 }
204 make_ssh_args("-l");
Damien Millerd7686fd2001-02-10 00:40:03 +1100205 make_ssh_args(userhost);
206 host++;
Damien Miller33804262001-02-04 23:20:18 +1100207 }
208
Damien Millerd7686fd2001-02-10 00:40:03 +1100209 if (!*host) {
Damien Miller33804262001-02-04 23:20:18 +1100210 fprintf(stderr, "Missing hostname\n");
211 usage();
212 }
213
214 /* Set up logging and debug '-d' arguments to ssh */
215 ll = SYSLOG_LEVEL_INFO;
216 switch (debug_level) {
217 case 1:
218 ll = SYSLOG_LEVEL_DEBUG1;
219 make_ssh_args("-v");
220 break;
221 case 2:
222 ll = SYSLOG_LEVEL_DEBUG2;
223 make_ssh_args("-v");
224 make_ssh_args("-v");
225 break;
226 case 3:
227 ll = SYSLOG_LEVEL_DEBUG3;
228 make_ssh_args("-v");
229 make_ssh_args("-v");
230 make_ssh_args("-v");
231 break;
232 }
233
234 if (compress_flag)
235 make_ssh_args("-C");
236
237 log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
238
Damien Millerd7686fd2001-02-10 00:40:03 +1100239 make_ssh_args(host);
Damien Miller33804262001-02-04 23:20:18 +1100240
Damien Millerd7686fd2001-02-10 00:40:03 +1100241 fprintf(stderr, "Connecting to %s...\n", host);
Damien Miller33804262001-02-04 23:20:18 +1100242
243 connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
244
245 do_init(in, out);
246
247 interactive_loop(in, out);
248
Ben Lindstrom10b9bf92001-02-26 20:04:45 +0000249#if !defined(USE_PIPES)
250 shutdown(in, SHUT_RDWR);
251 shutdown(out, SHUT_RDWR);
252#endif
253
Damien Miller33804262001-02-04 23:20:18 +1100254 close(in);
255 close(out);
256
Ben Lindstrom10b9bf92001-02-26 20:04:45 +0000257#if !defined(HAVE_CYGWIN)
Damien Miller33804262001-02-04 23:20:18 +1100258 if (kill(sshpid, SIGHUP) == -1)
259 fatal("Couldn't terminate ssh process: %s", strerror(errno));
Ben Lindstrom10b9bf92001-02-26 20:04:45 +0000260#endif
Damien Miller33804262001-02-04 23:20:18 +1100261
Damien Millerd7686fd2001-02-10 00:40:03 +1100262 if (waitpid(sshpid, NULL, 0) == -1)
263 fatal("Couldn't wait for ssh process: %s", strerror(errno));
Damien Miller33804262001-02-04 23:20:18 +1100264
265 exit(0);
266}