Annotation of src/usr.bin/ssh/sftp.c, Revision 1.11.2.1
1.1 djm 1: /*
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:
1.11.2.1! jason 27: RCSID("$OpenBSD: sftp.c,v 1.7 2001/02/08 00:04:52 markus Exp $");
1.1 djm 28:
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:
1.7 markus 43: int use_ssh1 = 0;
44: char *ssh_program = _PATH_SSH_PROGRAM;
45: char *sftp_server = NULL;
46:
1.1 djm 47: void
48: connect_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);
1.7 markus 79: execv(ssh_program, args);
80: fprintf(stderr, "exec: %s: %s\n", ssh_program, strerror(errno));
1.1 djm 81: exit(1);
82: }
83:
84: close(c_in);
85: close(c_out);
86: }
87:
88: char **
89: make_ssh_args(char *add_arg)
90: {
91: static char **args = NULL;
92: static int nargs = 0;
93: char debug_buf[4096];
1.11.2.1! jason 94: 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;
1.1 djm 100:
101: /* Init args array */
102: if (args == NULL) {
1.11.2.1! jason 103: nargs = use_subsystem ? 6 : 5;
1.1 djm 104: i = 0;
105: args = xmalloc(sizeof(*args) * nargs);
106: args[i++] = "ssh";
1.11.2.1! jason 107: 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";
1.1 djm 112: 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: }
1.9 markus 123:
1.1 djm 124: /* Otherwise finish up and return the arg array */
1.7 markus 125: if (sftp_server != NULL)
126: make_ssh_args(sftp_server);
127: else
128: make_ssh_args("sftp");
1.1 djm 129:
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:
1.2 stevesk 143: void
1.1 djm 144: usage(void)
145: {
1.11.2.1! jason 146: fprintf(stderr, "usage: sftp [-1vC] [-osshopt=value] [user@]host\n");
1.1 djm 147: exit(1);
148: }
149:
1.2 stevesk 150: int
1.1 djm 151: main(int argc, char **argv)
152: {
1.3 djm 153: int in, out, ch, debug_level, compress_flag;
1.1 djm 154: pid_t sshpid;
1.3 djm 155: char *host, *userhost;
1.1 djm 156: LogLevel ll;
1.3 djm 157: extern int optind;
158: extern char *optarg;
1.1 djm 159:
160: debug_level = compress_flag = 0;
1.3 djm 161:
1.11.2.1! jason 162: while ((ch = getopt(argc, argv, "1hvCo:s:S:")) != -1) {
1.3 djm 163: switch (ch) {
164: case 'C':
165: compress_flag = 1;
166: break;
167: case 'v':
1.1 djm 168: debug_level = MIN(3, debug_level + 1);
1.3 djm 169: break;
170: case 'o':
1.5 djm 171: make_ssh_args("-o");
1.3 djm 172: make_ssh_args(optarg);
1.7 markus 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;
1.3 djm 184: break;
185: case 'h':
186: default:
1.1 djm 187: usage();
188: }
189: }
190:
1.3 djm 191: if (optind == argc || argc > (optind + 1))
1.1 djm 192: usage();
193:
1.3 djm 194: userhost = argv[optind];
195:
196: if ((host = strchr(userhost, '@')) == NULL)
197: host = userhost;
1.1 djm 198: else {
1.3 djm 199: *host = '\0';
200: if (!userhost[0]) {
1.1 djm 201: fprintf(stderr, "Missing username\n");
202: usage();
203: }
204: make_ssh_args("-l");
1.3 djm 205: make_ssh_args(userhost);
206: host++;
1.1 djm 207: }
208:
1.3 djm 209: if (!*host) {
1.1 djm 210: 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:
1.3 djm 239: make_ssh_args(host);
1.1 djm 240:
1.3 djm 241: fprintf(stderr, "Connecting to %s...\n", host);
1.1 djm 242:
243: connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
244:
1.11.2.1! jason 245: do_init(in, out);
! 246:
1.1 djm 247: interactive_loop(in, out);
248:
249: close(in);
250: close(out);
1.11.2.1! jason 251:
! 252: if (kill(sshpid, SIGHUP) == -1)
! 253: fatal("Couldn't terminate ssh process: %s", strerror(errno));
1.1 djm 254:
1.4 djm 255: if (waitpid(sshpid, NULL, 0) == -1)
256: fatal("Couldn't wait for ssh process: %s", strerror(errno));
1.1 djm 257:
258: exit(0);
259: }
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