Annotation of src/usr.bin/ssh/sftp.c, Revision 1.5
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:
1.5 ! djm 27: RCSID("$OpenBSD: sftp.c,v 1.4 2001/02/06 22:06:21 djm 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:
43: void
44: connect_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:
84: char **
85: make_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:
1.2 stevesk 128: void
1.1 djm 129: usage(void)
130: {
131: fprintf(stderr, "usage: sftp [-vC] [-osshopt=value] [user@]host\n");
132: exit(1);
133: }
134:
1.2 stevesk 135: int
1.1 djm 136: main(int argc, char **argv)
137: {
1.3 djm 138: int in, out, ch, debug_level, compress_flag;
1.1 djm 139: pid_t sshpid;
1.3 djm 140: char *host, *userhost;
1.1 djm 141: LogLevel ll;
1.3 djm 142: extern int optind;
143: extern char *optarg;
1.1 djm 144:
145: debug_level = compress_flag = 0;
1.3 djm 146:
147: while ((ch = getopt(argc, argv, "hCvo:")) != -1) {
148: switch (ch) {
149: case 'C':
150: compress_flag = 1;
151: break;
152: case 'v':
1.1 djm 153: debug_level = MIN(3, debug_level + 1);
1.3 djm 154: break;
155: case 'o':
1.5 ! djm 156: make_ssh_args("-o");
1.3 djm 157: make_ssh_args(optarg);
158: break;
159: case 'h':
160: default:
1.1 djm 161: usage();
162: }
163: }
164:
1.3 djm 165: if (optind == argc || argc > (optind + 1))
1.1 djm 166: usage();
167:
1.3 djm 168: userhost = argv[optind];
169:
170: if ((host = strchr(userhost, '@')) == NULL)
171: host = userhost;
1.1 djm 172: else {
1.3 djm 173: *host = '\0';
174: if (!userhost[0]) {
1.1 djm 175: fprintf(stderr, "Missing username\n");
176: usage();
177: }
178: make_ssh_args("-l");
1.3 djm 179: make_ssh_args(userhost);
180: host++;
1.1 djm 181: }
182:
1.3 djm 183: if (!*host) {
1.1 djm 184: fprintf(stderr, "Missing hostname\n");
185: usage();
186: }
187:
188: /* Set up logging and debug '-d' arguments to ssh */
189: ll = SYSLOG_LEVEL_INFO;
190: switch (debug_level) {
191: case 1:
192: ll = SYSLOG_LEVEL_DEBUG1;
193: make_ssh_args("-v");
194: break;
195: case 2:
196: ll = SYSLOG_LEVEL_DEBUG2;
197: make_ssh_args("-v");
198: make_ssh_args("-v");
199: break;
200: case 3:
201: ll = SYSLOG_LEVEL_DEBUG3;
202: make_ssh_args("-v");
203: make_ssh_args("-v");
204: make_ssh_args("-v");
205: break;
206: }
207:
208: if (compress_flag)
209: make_ssh_args("-C");
210:
211: log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
212:
1.3 djm 213: make_ssh_args(host);
1.1 djm 214:
1.3 djm 215: fprintf(stderr, "Connecting to %s...\n", host);
1.1 djm 216:
217: connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
218:
219: do_init(in, out);
220:
221: interactive_loop(in, out);
222:
223: close(in);
224: close(out);
225:
226: if (kill(sshpid, SIGHUP) == -1)
227: fatal("Couldn't terminate ssh process: %s", strerror(errno));
228:
1.4 djm 229: if (waitpid(sshpid, NULL, 0) == -1)
230: fatal("Couldn't wait for ssh process: %s", strerror(errno));
1.1 djm 231:
232: exit(0);
233: }
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