blob: 27873d034a54aa14116dde6e748d91166cc4bf91 [file] [log] [blame]
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
Kevin Steves2b725a02001-02-05 18:16:28 +000027RCSID("$OpenBSD: sftp.c,v 1.2 2001/02/04 15:32:25 stevesk 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
43void
44connect_to_server(char **args, int *in, int *out, pid_t *sshpid)
45{
46 int c_in, c_out;
47#ifdef USE_PIPES
48 int pin[2], pout[2];
49 if ((pipe(pin) == -1) || (pipe(pout) == -1))
50 fatal("pipe: %s", strerror(errno));
51 *in = pin[0];
52 *out = pout[1];
53 c_in = pout[0];
54 c_out = pin[1];
55#else /* USE_PIPES */
56 int inout[2];
57 if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
58 fatal("socketpair: %s", strerror(errno));
59 *in = *out = inout[0];
60 c_in = c_out = inout[1];
61#endif /* USE_PIPES */
62
63 if ((*sshpid = fork()) == -1)
64 fatal("fork: %s", strerror(errno));
65 else if (*sshpid == 0) {
66 if ((dup2(c_in, STDIN_FILENO) == -1) ||
67 (dup2(c_out, STDOUT_FILENO) == -1)) {
68 fprintf(stderr, "dup2: %s\n", strerror(errno));
69 exit(1);
70 }
71 close(*in);
72 close(*out);
73 close(c_in);
74 close(c_out);
75 execv(_PATH_SSH_PROGRAM, args);
76 fprintf(stderr, "exec: %s", strerror(errno));
77 exit(1);
78 }
79
80 close(c_in);
81 close(c_out);
82}
83
84char **
85make_ssh_args(char *add_arg)
86{
87 static char **args = NULL;
88 static int nargs = 0;
89 char debug_buf[4096];
90 int i;
91
92 /* Init args array */
93 if (args == NULL) {
94 nargs = 4;
95 i = 0;
96 args = xmalloc(sizeof(*args) * nargs);
97 args[i++] = "ssh";
98 args[i++] = "-oProtocol=2";
99 args[i++] = "-s";
100 args[i++] = NULL;
101 }
102
103 /* If asked to add args, then do so and return */
104 if (add_arg) {
105 i = nargs++ - 1;
106 args = xrealloc(args, sizeof(*args) * nargs);
107 args[i++] = add_arg;
108 args[i++] = NULL;
109 return(NULL);
110 }
111
112 /* Otherwise finish up and return the arg array */
113 make_ssh_args("sftp");
114
115 /* XXX: overflow - doesn't grow debug_buf */
116 debug_buf[0] = '\0';
117 for(i = 0; args[i]; i++) {
118 if (i)
119 strlcat(debug_buf, " ", sizeof(debug_buf));
120
121 strlcat(debug_buf, args[i], sizeof(debug_buf));
122 }
123 debug("SSH args \"%s\"", debug_buf);
124
125 return(args);
126}
127
Kevin Stevesef4eea92001-02-05 12:42:17 +0000128void
Damien Miller33804262001-02-04 23:20:18 +1100129usage(void)
130{
131 fprintf(stderr, "usage: sftp [-vC] [-osshopt=value] [user@]host\n");
132 exit(1);
133}
134
Kevin Stevesef4eea92001-02-05 12:42:17 +0000135int
Damien Miller33804262001-02-04 23:20:18 +1100136main(int argc, char **argv)
137{
138 int in, out, i, debug_level, compress_flag;
139 pid_t sshpid;
140 char *cp;
141 LogLevel ll;
142
143 debug_level = compress_flag = 0;
144 for(i = 1; i < argc && argv[i][0] == '-'; i++) {
145 if (!strcmp(argv[i], "-v"))
146 debug_level = MIN(3, debug_level + 1);
147 else if (!strcmp(argv[i], "-C"))
148 compress_flag = 1;
149 else if (!strncmp(argv[i], "-o", 2)) {
150 make_ssh_args(argv[i]);
151 } else {
152 fprintf(stderr, "Unknown option \"%s\"\n", argv[i]);
153 usage();
154 }
155 }
156
157 if (i == argc || argc > (i + 1))
158 usage();
159
160 if ((cp = strchr(argv[i], '@')) == NULL)
161 cp = argv[i];
162 else {
163 *cp = '\0';
164 if (!argv[i][0]) {
165 fprintf(stderr, "Missing username\n");
166 usage();
167 }
168 make_ssh_args("-l");
169 make_ssh_args(argv[i]);
170 cp++;
171 }
172
173 if (!*cp) {
174 fprintf(stderr, "Missing hostname\n");
175 usage();
176 }
177
178 /* Set up logging and debug '-d' arguments to ssh */
179 ll = SYSLOG_LEVEL_INFO;
180 switch (debug_level) {
181 case 1:
182 ll = SYSLOG_LEVEL_DEBUG1;
183 make_ssh_args("-v");
184 break;
185 case 2:
186 ll = SYSLOG_LEVEL_DEBUG2;
187 make_ssh_args("-v");
188 make_ssh_args("-v");
189 break;
190 case 3:
191 ll = SYSLOG_LEVEL_DEBUG3;
192 make_ssh_args("-v");
193 make_ssh_args("-v");
194 make_ssh_args("-v");
195 break;
196 }
197
198 if (compress_flag)
199 make_ssh_args("-C");
200
201 log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
202
203 make_ssh_args(cp);
204
205 fprintf(stderr, "Connecting to %s...\n", cp);
206
207 connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
208
209 do_init(in, out);
210
211 interactive_loop(in, out);
212
213 close(in);
214 close(out);
215
216 if (kill(sshpid, SIGHUP) == -1)
217 fatal("Couldn't terminate ssh process: %s", strerror(errno));
218
219 /* XXX: wait? */
220
221 exit(0);
222}