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61e96248 | 1 | /* |
a96fd7c2 | 2 | * Copyright (c) 2001,2002 Damien Miller. All rights reserved. |
61e96248 | 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 | ||
659912db | 27 | RCSID("$OpenBSD: sftp.c,v 1.37 2003/07/10 20:05:55 markus Exp $"); |
61e96248 | 28 | |
29 | #include "buffer.h" | |
30 | #include "xmalloc.h" | |
31 | #include "log.h" | |
32 | #include "pathnames.h" | |
1fcde3fe | 33 | #include "misc.h" |
61e96248 | 34 | |
35 | #include "sftp.h" | |
36 | #include "sftp-common.h" | |
37 | #include "sftp-client.h" | |
38 | #include "sftp-int.h" | |
39 | ||
5152d46f | 40 | #ifdef HAVE___PROGNAME |
41 | extern char *__progname; | |
42 | #else | |
43 | char *__progname; | |
44 | #endif | |
45 | ||
a5ec8a3d | 46 | FILE* infile; |
375f867e | 47 | size_t copy_buffer_len = 32768; |
c25d3df7 | 48 | size_t num_requests = 16; |
1b558925 | 49 | static pid_t sshpid = -1; |
0426a3b4 | 50 | |
b65c3807 | 51 | extern int showprogress; |
52 | ||
396c147e | 53 | static void |
1b558925 | 54 | killchild(int signo) |
55 | { | |
56 | if (sshpid > 1) | |
57 | kill(sshpid, signo); | |
58 | ||
59 | _exit(1); | |
60 | } | |
61 | ||
62 | static void | |
63 | connect_to_server(char *path, char **args, int *in, int *out) | |
61e96248 | 64 | { |
65 | int c_in, c_out; | |
9906a836 | 66 | |
61e96248 | 67 | #ifdef USE_PIPES |
68 | int pin[2], pout[2]; | |
9906a836 | 69 | |
61e96248 | 70 | if ((pipe(pin) == -1) || (pipe(pout) == -1)) |
71 | fatal("pipe: %s", strerror(errno)); | |
72 | *in = pin[0]; | |
73 | *out = pout[1]; | |
74 | c_in = pout[0]; | |
75 | c_out = pin[1]; | |
76 | #else /* USE_PIPES */ | |
77 | int inout[2]; | |
9906a836 | 78 | |
61e96248 | 79 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) |
80 | fatal("socketpair: %s", strerror(errno)); | |
81 | *in = *out = inout[0]; | |
82 | c_in = c_out = inout[1]; | |
83 | #endif /* USE_PIPES */ | |
84 | ||
1b558925 | 85 | if ((sshpid = fork()) == -1) |
61e96248 | 86 | fatal("fork: %s", strerror(errno)); |
1b558925 | 87 | else if (sshpid == 0) { |
61e96248 | 88 | if ((dup2(c_in, STDIN_FILENO) == -1) || |
89 | (dup2(c_out, STDOUT_FILENO) == -1)) { | |
90 | fprintf(stderr, "dup2: %s\n", strerror(errno)); | |
91 | exit(1); | |
92 | } | |
93 | close(*in); | |
94 | close(*out); | |
95 | close(c_in); | |
96 | close(c_out); | |
a96fd7c2 | 97 | execv(path, args); |
98 | fprintf(stderr, "exec: %s: %s\n", path, strerror(errno)); | |
61e96248 | 99 | exit(1); |
100 | } | |
101 | ||
1b558925 | 102 | signal(SIGTERM, killchild); |
103 | signal(SIGINT, killchild); | |
104 | signal(SIGHUP, killchild); | |
61e96248 | 105 | close(c_in); |
106 | close(c_out); | |
107 | } | |
108 | ||
396c147e | 109 | static void |
61e96248 | 110 | usage(void) |
111 | { | |
22be05a5 | 112 | extern char *__progname; |
762715ce | 113 | |
f1278af7 | 114 | fprintf(stderr, |
659912db | 115 | "usage: %s [-vC1] [-b batchfile] [-o ssh_option] [-s subsystem | sftp_server]\n" |
116 | " [-B buffer_size] [-F ssh_config] [-P sftp_server path]\n" | |
117 | " [-R num_requests] [-S program]\n" | |
22be05a5 | 118 | " [user@]host[:file [file]]\n", __progname); |
61e96248 | 119 | exit(1); |
120 | } | |
121 | ||
2b87da3b | 122 | int |
61e96248 | 123 | main(int argc, char **argv) |
124 | { | |
9a36208d | 125 | int in, out, ch, err; |
edeeab1e | 126 | char *host, *userhost, *cp, *file2; |
8a624ebf | 127 | int debug_level = 0, sshver = 2; |
128 | char *file1 = NULL, *sftp_server = NULL; | |
a96fd7c2 | 129 | char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; |
8a624ebf | 130 | LogLevel ll = SYSLOG_LEVEL_INFO; |
131 | arglist args; | |
0426a3b4 | 132 | extern int optind; |
133 | extern char *optarg; | |
61e96248 | 134 | |
5152d46f | 135 | __progname = get_progname(argv[0]); |
8a624ebf | 136 | args.list = NULL; |
184eed6a | 137 | addargs(&args, "ssh"); /* overwritten with ssh_program */ |
8a624ebf | 138 | addargs(&args, "-oForwardX11 no"); |
139 | addargs(&args, "-oForwardAgent no"); | |
e1c5bfaf | 140 | addargs(&args, "-oClearAllForwardings yes"); |
8a624ebf | 141 | ll = SYSLOG_LEVEL_INFO; |
142 | infile = stdin; /* Read from STDIN unless changed by -b */ | |
0426a3b4 | 143 | |
c25d3df7 | 144 | while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { |
0426a3b4 | 145 | switch (ch) { |
146 | case 'C': | |
8a624ebf | 147 | addargs(&args, "-C"); |
0426a3b4 | 148 | break; |
149 | case 'v': | |
8a624ebf | 150 | if (debug_level < 3) { |
151 | addargs(&args, "-v"); | |
152 | ll = SYSLOG_LEVEL_DEBUG1 + debug_level; | |
153 | } | |
154 | debug_level++; | |
0426a3b4 | 155 | break; |
f1278af7 | 156 | case 'F': |
0426a3b4 | 157 | case 'o': |
f1278af7 | 158 | addargs(&args, "-%c%s", ch, optarg); |
0426a3b4 | 159 | break; |
160 | case '1': | |
8a624ebf | 161 | sshver = 1; |
0426a3b4 | 162 | if (sftp_server == NULL) |
163 | sftp_server = _PATH_SFTP_SERVER; | |
164 | break; | |
165 | case 's': | |
166 | sftp_server = optarg; | |
167 | break; | |
168 | case 'S': | |
169 | ssh_program = optarg; | |
170 | break; | |
a5ec8a3d | 171 | case 'b': |
172 | if (infile == stdin) { | |
173 | infile = fopen(optarg, "r"); | |
cd332296 | 174 | if (infile == NULL) |
a5ec8a3d | 175 | fatal("%s (%s).", strerror(errno), optarg); |
cd332296 | 176 | } else |
a5ec8a3d | 177 | fatal("Filename already specified."); |
b65c3807 | 178 | showprogress = 0; |
a5ec8a3d | 179 | break; |
a96fd7c2 | 180 | case 'P': |
181 | sftp_direct = optarg; | |
182 | break; | |
375f867e | 183 | case 'B': |
184 | copy_buffer_len = strtol(optarg, &cp, 10); | |
185 | if (copy_buffer_len == 0 || *cp != '\0') | |
186 | fatal("Invalid buffer size \"%s\"", optarg); | |
187 | break; | |
c25d3df7 | 188 | case 'R': |
189 | num_requests = strtol(optarg, &cp, 10); | |
190 | if (num_requests == 0 || *cp != '\0') | |
762715ce | 191 | fatal("Invalid number of requests \"%s\"", |
c25d3df7 | 192 | optarg); |
193 | break; | |
0426a3b4 | 194 | case 'h': |
195 | default: | |
61e96248 | 196 | usage(); |
197 | } | |
198 | } | |
199 | ||
b69145c2 | 200 | log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); |
201 | ||
a96fd7c2 | 202 | if (sftp_direct == NULL) { |
203 | if (optind == argc || argc > (optind + 2)) | |
204 | usage(); | |
61e96248 | 205 | |
a96fd7c2 | 206 | userhost = xstrdup(argv[optind]); |
207 | file2 = argv[optind+1]; | |
edeeab1e | 208 | |
a96fd7c2 | 209 | if ((cp = colon(userhost)) != NULL) { |
210 | *cp++ = '\0'; | |
211 | file1 = cp; | |
212 | } | |
0426a3b4 | 213 | |
15748b4d | 214 | if ((host = strrchr(userhost, '@')) == NULL) |
a96fd7c2 | 215 | host = userhost; |
216 | else { | |
217 | *host++ = '\0'; | |
218 | if (!userhost[0]) { | |
219 | fprintf(stderr, "Missing username\n"); | |
220 | usage(); | |
221 | } | |
222 | addargs(&args, "-l%s",userhost); | |
61e96248 | 223 | } |
61e96248 | 224 | |
a96fd7c2 | 225 | host = cleanhostname(host); |
226 | if (!*host) { | |
227 | fprintf(stderr, "Missing hostname\n"); | |
228 | usage(); | |
229 | } | |
61e96248 | 230 | |
a96fd7c2 | 231 | addargs(&args, "-oProtocol %d", sshver); |
8a624ebf | 232 | |
a96fd7c2 | 233 | /* no subsystem if the server-spec contains a '/' */ |
234 | if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) | |
235 | addargs(&args, "-s"); | |
61e96248 | 236 | |
a96fd7c2 | 237 | addargs(&args, "%s", host); |
762715ce | 238 | addargs(&args, "%s", (sftp_server != NULL ? |
a96fd7c2 | 239 | sftp_server : "sftp")); |
240 | args.list[0] = ssh_program; | |
61e96248 | 241 | |
a96fd7c2 | 242 | fprintf(stderr, "Connecting to %s...\n", host); |
1b558925 | 243 | connect_to_server(ssh_program, args.list, &in, &out); |
a96fd7c2 | 244 | } else { |
245 | args.list = NULL; | |
246 | addargs(&args, "sftp-server"); | |
61e96248 | 247 | |
a96fd7c2 | 248 | fprintf(stderr, "Attaching to %s...\n", sftp_direct); |
1b558925 | 249 | connect_to_server(sftp_direct, args.list, &in, &out); |
a96fd7c2 | 250 | } |
61e96248 | 251 | |
9a36208d | 252 | err = interactive_loop(in, out, file1, file2); |
61e96248 | 253 | |
51fb577a | 254 | #if !defined(USE_PIPES) |
875ec275 | 255 | shutdown(in, SHUT_RDWR); |
256 | shutdown(out, SHUT_RDWR); | |
51fb577a | 257 | #endif |
258 | ||
61e96248 | 259 | close(in); |
260 | close(out); | |
a5ec8a3d | 261 | if (infile != stdin) |
262 | fclose(infile); | |
61e96248 | 263 | |
8c38e88b | 264 | while (waitpid(sshpid, NULL, 0) == -1) |
265 | if (errno != EINTR) | |
266 | fatal("Couldn't wait for ssh process: %s", | |
267 | strerror(errno)); | |
61e96248 | 268 | |
9a36208d | 269 | exit(err == 0 ? 0 : 1); |
61e96248 | 270 | } |