Annotation of src/usr.bin/ssh/sftp.c, Revision 1.7.2.4
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:
1.7.2.4 ! jason 27: RCSID("$OpenBSD: sftp.c,v 1.15 2001/04/16 02:31:44 mouring Exp $");
1.1 djm 28:
29: /* XXX: commandline mode */
30: /* XXX: short-form remote directory listings (like 'ls -C') */
31:
32: #include "buffer.h"
33: #include "xmalloc.h"
34: #include "log.h"
35: #include "pathnames.h"
36:
37: #include "sftp.h"
38: #include "sftp-common.h"
39: #include "sftp-client.h"
40: #include "sftp-int.h"
41:
1.7.2.4 ! jason 42: #include "scp-common.h"
! 43:
1.7 markus 44: int use_ssh1 = 0;
45: char *ssh_program = _PATH_SSH_PROGRAM;
46: char *sftp_server = NULL;
1.7.2.3 jason 47: FILE* infile;
1.7 markus 48:
1.1 djm 49: void
50: connect_to_server(char **args, int *in, int *out, pid_t *sshpid)
51: {
52: int c_in, c_out;
53: #ifdef USE_PIPES
54: int pin[2], pout[2];
55: if ((pipe(pin) == -1) || (pipe(pout) == -1))
56: fatal("pipe: %s", strerror(errno));
57: *in = pin[0];
58: *out = pout[1];
59: c_in = pout[0];
60: c_out = pin[1];
61: #else /* USE_PIPES */
62: int inout[2];
63: if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
64: fatal("socketpair: %s", strerror(errno));
65: *in = *out = inout[0];
66: c_in = c_out = inout[1];
67: #endif /* USE_PIPES */
68:
69: if ((*sshpid = fork()) == -1)
70: fatal("fork: %s", strerror(errno));
71: else if (*sshpid == 0) {
72: if ((dup2(c_in, STDIN_FILENO) == -1) ||
73: (dup2(c_out, STDOUT_FILENO) == -1)) {
74: fprintf(stderr, "dup2: %s\n", strerror(errno));
75: exit(1);
76: }
77: close(*in);
78: close(*out);
79: close(c_in);
80: close(c_out);
1.7 markus 81: execv(ssh_program, args);
82: fprintf(stderr, "exec: %s: %s\n", ssh_program, strerror(errno));
1.1 djm 83: exit(1);
84: }
85:
86: close(c_in);
87: close(c_out);
88: }
89:
90: char **
91: make_ssh_args(char *add_arg)
92: {
93: static char **args = NULL;
94: static int nargs = 0;
95: char debug_buf[4096];
1.7.2.3 jason 96: int i;
1.1 djm 97:
98: /* Init args array */
99: if (args == NULL) {
1.7.2.3 jason 100: nargs = 2;
1.1 djm 101: i = 0;
102: args = xmalloc(sizeof(*args) * nargs);
103: args[i++] = "ssh";
104: args[i++] = NULL;
105: }
106:
107: /* If asked to add args, then do so and return */
108: if (add_arg) {
109: i = nargs++ - 1;
110: args = xrealloc(args, sizeof(*args) * nargs);
111: args[i++] = add_arg;
112: args[i++] = NULL;
113: return(NULL);
114: }
115:
1.7.2.3 jason 116: /* no subsystem if the server-spec contains a '/' */
117: if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
118: make_ssh_args("-s");
119: make_ssh_args("-oForwardX11=no");
120: make_ssh_args("-oForwardAgent=no");
121: make_ssh_args(use_ssh1 ? "-oProtocol=1" : "-oProtocol=2");
122:
1.1 djm 123: /* Otherwise finish up and return the arg array */
1.7 markus 124: if (sftp_server != NULL)
125: make_ssh_args(sftp_server);
126: else
127: make_ssh_args("sftp");
1.1 djm 128:
129: /* XXX: overflow - doesn't grow debug_buf */
130: debug_buf[0] = '\0';
131: for(i = 0; args[i]; i++) {
132: if (i)
133: strlcat(debug_buf, " ", sizeof(debug_buf));
134:
135: strlcat(debug_buf, args[i], sizeof(debug_buf));
136: }
137: debug("SSH args \"%s\"", debug_buf);
138:
139: return(args);
140: }
141:
1.2 stevesk 142: void
1.1 djm 143: usage(void)
144: {
1.7.2.4 ! jason 145: fprintf(stderr, "usage: sftp [-1vC] [-b batchfile] [-osshopt=value] [user@]host[:file [file]]\n");
1.1 djm 146: exit(1);
147: }
148:
1.2 stevesk 149: int
1.1 djm 150: main(int argc, char **argv)
151: {
1.3 djm 152: int in, out, ch, debug_level, compress_flag;
1.1 djm 153: pid_t sshpid;
1.7.2.4 ! jason 154: char *file1 = NULL;
! 155: char *host, *userhost, *cp, *file2;
1.1 djm 156: LogLevel ll;
1.3 djm 157: extern int optind;
158: extern char *optarg;
1.1 djm 159:
1.7.2.3 jason 160: infile = stdin; /* Read from STDIN unless changed by -b */
1.1 djm 161: debug_level = compress_flag = 0;
1.3 djm 162:
1.7.2.3 jason 163: while ((ch = getopt(argc, argv, "1hvCo:s:S:b:")) != -1) {
1.3 djm 164: switch (ch) {
165: case 'C':
166: compress_flag = 1;
167: break;
168: case 'v':
1.1 djm 169: debug_level = MIN(3, debug_level + 1);
1.3 djm 170: break;
171: case 'o':
1.5 djm 172: make_ssh_args("-o");
1.3 djm 173: make_ssh_args(optarg);
1.7 markus 174: break;
175: case '1':
176: use_ssh1 = 1;
177: if (sftp_server == NULL)
178: sftp_server = _PATH_SFTP_SERVER;
179: break;
180: case 's':
181: sftp_server = optarg;
182: break;
183: case 'S':
184: ssh_program = optarg;
1.3 djm 185: break;
1.7.2.3 jason 186: case 'b':
187: if (infile == stdin) {
188: infile = fopen(optarg, "r");
1.7.2.4 ! jason 189: if (infile == NULL)
1.7.2.3 jason 190: fatal("%s (%s).", strerror(errno), optarg);
1.7.2.4 ! jason 191: } else
1.7.2.3 jason 192: fatal("Filename already specified.");
193: break;
1.3 djm 194: case 'h':
195: default:
1.1 djm 196: usage();
197: }
198: }
199:
1.7.2.4 ! jason 200: if (optind == argc || argc > (optind + 2))
1.1 djm 201: usage();
202:
1.7.2.4 ! jason 203: userhost = xstrdup(argv[optind]);
! 204: file2 = argv[optind+1];
! 205:
! 206: if ((cp = colon(userhost)) != NULL) {
! 207: *cp++ = '\0';
! 208: file1 = cp;
! 209: }
1.3 djm 210:
211: if ((host = strchr(userhost, '@')) == NULL)
212: host = userhost;
1.1 djm 213: else {
1.7.2.4 ! jason 214: *host++ = '\0';
1.3 djm 215: if (!userhost[0]) {
1.1 djm 216: fprintf(stderr, "Missing username\n");
217: usage();
218: }
219: make_ssh_args("-l");
1.3 djm 220: make_ssh_args(userhost);
1.1 djm 221: }
222:
1.7.2.4 ! jason 223: host = cleanhostname(host);
1.3 djm 224: if (!*host) {
1.1 djm 225: fprintf(stderr, "Missing hostname\n");
226: usage();
227: }
228:
229: /* Set up logging and debug '-d' arguments to ssh */
230: ll = SYSLOG_LEVEL_INFO;
231: switch (debug_level) {
232: case 1:
233: ll = SYSLOG_LEVEL_DEBUG1;
234: make_ssh_args("-v");
235: break;
236: case 2:
237: ll = SYSLOG_LEVEL_DEBUG2;
238: make_ssh_args("-v");
239: make_ssh_args("-v");
240: break;
241: case 3:
242: ll = SYSLOG_LEVEL_DEBUG3;
243: make_ssh_args("-v");
244: make_ssh_args("-v");
245: make_ssh_args("-v");
246: break;
247: }
248:
249: if (compress_flag)
250: make_ssh_args("-C");
251:
252: log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
253:
1.3 djm 254: make_ssh_args(host);
1.1 djm 255:
1.3 djm 256: fprintf(stderr, "Connecting to %s...\n", host);
1.1 djm 257:
258: connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid);
259:
1.7.2.4 ! jason 260: interactive_loop(in, out, file1, file2);
1.1 djm 261:
262: close(in);
263: close(out);
1.7.2.3 jason 264: if (infile != stdin)
265: fclose(infile);
1.1 djm 266:
1.4 djm 267: if (waitpid(sshpid, NULL, 0) == -1)
268: fatal("Couldn't wait for ssh process: %s", strerror(errno));
1.1 djm 269:
270: exit(0);
271: }
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