Annotation of src/usr.bin/ssh/sftp.c, Revision 1.9
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:
1.9 ! markus 27: RCSID("$OpenBSD: sftp.c,v 1.8 2001/02/28 05:36:28 deraadt 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];
1.9 ! markus 94: int i;
1.1 djm 95:
96: /* Init args array */
97: if (args == NULL) {
1.9 ! markus 98: nargs = 2;
1.1 djm 99: i = 0;
100: args = xmalloc(sizeof(*args) * nargs);
101: args[i++] = "ssh";
102: args[i++] = NULL;
103: }
104:
105: /* If asked to add args, then do so and return */
106: if (add_arg) {
107: i = nargs++ - 1;
108: args = xrealloc(args, sizeof(*args) * nargs);
109: args[i++] = add_arg;
110: args[i++] = NULL;
111: return(NULL);
112: }
1.9 ! markus 113:
! 114: /* no subsystem if the server-spec contains a '/' */
! 115: if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
! 116: make_ssh_args("-s");
! 117: make_ssh_args("-oForwardX11=no");
! 118: make_ssh_args("-oForwardAgent=no");
! 119: make_ssh_args(use_ssh1 ? "-oProtocol=1" : "-oProtocol=2");
1.1 djm 120:
121: /* Otherwise finish up and return the arg array */
1.7 markus 122: if (sftp_server != NULL)
123: make_ssh_args(sftp_server);
124: else
125: make_ssh_args("sftp");
1.1 djm 126:
127: /* XXX: overflow - doesn't grow debug_buf */
128: debug_buf[0] = '\0';
129: for(i = 0; args[i]; i++) {
130: if (i)
131: strlcat(debug_buf, " ", sizeof(debug_buf));
132:
133: strlcat(debug_buf, args[i], sizeof(debug_buf));
134: }
135: debug("SSH args \"%s\"", debug_buf);
136:
137: return(args);
138: }
139:
1.2 stevesk 140: void
1.1 djm 141: usage(void)
142: {
1.7 markus 143: fprintf(stderr, "usage: sftp [-1vC] [-osshopt=value] [user@]host\n");
1.1 djm 144: exit(1);
145: }
146:
1.2 stevesk 147: int
1.1 djm 148: main(int argc, char **argv)
149: {
1.3 djm 150: int in, out, ch, debug_level, compress_flag;
1.1 djm 151: pid_t sshpid;
1.3 djm 152: char *host, *userhost;
1.1 djm 153: LogLevel ll;
1.3 djm 154: extern int optind;
155: extern char *optarg;
1.1 djm 156:
157: debug_level = compress_flag = 0;
1.3 djm 158:
1.7 markus 159: while ((ch = getopt(argc, argv, "1hvCo:s:S:")) != -1) {
1.3 djm 160: switch (ch) {
161: case 'C':
162: compress_flag = 1;
163: break;
164: case 'v':
1.1 djm 165: debug_level = MIN(3, debug_level + 1);
1.3 djm 166: break;
167: case 'o':
1.5 djm 168: make_ssh_args("-o");
1.3 djm 169: make_ssh_args(optarg);
1.7 markus 170: break;
171: case '1':
172: use_ssh1 = 1;
173: if (sftp_server == NULL)
174: sftp_server = _PATH_SFTP_SERVER;
175: break;
176: case 's':
177: sftp_server = optarg;
178: break;
179: case 'S':
180: ssh_program = optarg;
1.3 djm 181: break;
182: case 'h':
183: default:
1.1 djm 184: usage();
185: }
186: }
187:
1.3 djm 188: if (optind == argc || argc > (optind + 1))
1.1 djm 189: usage();
190:
1.3 djm 191: userhost = argv[optind];
192:
193: if ((host = strchr(userhost, '@')) == NULL)
194: host = userhost;
1.1 djm 195: else {
1.3 djm 196: *host = '\0';
197: if (!userhost[0]) {
1.1 djm 198: fprintf(stderr, "Missing username\n");
199: usage();
200: }
201: make_ssh_args("-l");
1.3 djm 202: make_ssh_args(userhost);
203: host++;
1.1 djm 204: }
205:
1.3 djm 206: if (!*host) {
1.1 djm 207: fprintf(stderr, "Missing hostname\n");
208: usage();
209: }
210:
211: /* Set up logging and debug '-d' arguments to ssh */
212: ll = SYSLOG_LEVEL_INFO;
213: switch (debug_level) {
214: case 1:
215: ll = SYSLOG_LEVEL_DEBUG1;
216: make_ssh_args("-v");
217: break;
218: case 2:
219: ll = SYSLOG_LEVEL_DEBUG2;
220: make_ssh_args("-v");
221: make_ssh_args("-v");
222: break;
223: case 3:
224: ll = SYSLOG_LEVEL_DEBUG3;
225: make_ssh_args("-v");
226: make_ssh_args("-v");
227: make_ssh_args("-v");
228: break;
229: }
230:
231: if (compress_flag)
232: make_ssh_args("-C");
233:
234: log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
235:
1.3 djm 236: make_ssh_args(host);
1.1 djm 237:
1.3 djm 238: fprintf(stderr, "Connecting to %s...\n", host);
1.1 djm 239:
240: connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
241:
242: do_init(in, out);
243:
244: interactive_loop(in, out);
245:
246: close(in);
247: close(out);
248:
1.4 djm 249: if (waitpid(sshpid, NULL, 0) == -1)
250: fatal("Couldn't wait for ssh process: %s", strerror(errno));
1.1 djm 251:
252: exit(0);
253: }