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1 | /* | |
2 | * Copyright (c) 2001,2002 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 | ||
27 | RCSID("$OpenBSD: sftp.c,v 1.37 2003/07/10 20:05:55 markus Exp $"); | |
28 | ||
29 | #include "buffer.h" | |
30 | #include "xmalloc.h" | |
31 | #include "log.h" | |
32 | #include "pathnames.h" | |
33 | #include "misc.h" | |
34 | ||
35 | #include "sftp.h" | |
36 | #include "sftp-common.h" | |
37 | #include "sftp-client.h" | |
38 | #include "sftp-int.h" | |
39 | ||
40 | #ifdef HAVE___PROGNAME | |
41 | extern char *__progname; | |
42 | #else | |
43 | char *__progname; | |
44 | #endif | |
45 | ||
46 | FILE* infile; | |
47 | size_t copy_buffer_len = 32768; | |
48 | size_t num_requests = 16; | |
49 | static pid_t sshpid = -1; | |
50 | ||
51 | extern int showprogress; | |
52 | ||
53 | static void | |
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) | |
64 | { | |
65 | int c_in, c_out; | |
66 | ||
67 | #ifdef USE_PIPES | |
68 | int pin[2], pout[2]; | |
69 | ||
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]; | |
78 | ||
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 | ||
85 | if ((sshpid = fork()) == -1) | |
86 | fatal("fork: %s", strerror(errno)); | |
87 | else if (sshpid == 0) { | |
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); | |
97 | execv(path, args); | |
98 | fprintf(stderr, "exec: %s: %s\n", path, strerror(errno)); | |
99 | exit(1); | |
100 | } | |
101 | ||
102 | signal(SIGTERM, killchild); | |
103 | signal(SIGINT, killchild); | |
104 | signal(SIGHUP, killchild); | |
105 | close(c_in); | |
106 | close(c_out); | |
107 | } | |
108 | ||
109 | static void | |
110 | usage(void) | |
111 | { | |
112 | extern char *__progname; | |
113 | ||
114 | fprintf(stderr, | |
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" | |
118 | " [user@]host[:file [file]]\n", __progname); | |
119 | exit(1); | |
120 | } | |
121 | ||
122 | int | |
123 | main(int argc, char **argv) | |
124 | { | |
125 | int in, out, ch, err; | |
126 | char *host, *userhost, *cp, *file2; | |
127 | int debug_level = 0, sshver = 2; | |
128 | char *file1 = NULL, *sftp_server = NULL; | |
129 | char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; | |
130 | LogLevel ll = SYSLOG_LEVEL_INFO; | |
131 | arglist args; | |
132 | extern int optind; | |
133 | extern char *optarg; | |
134 | ||
135 | __progname = get_progname(argv[0]); | |
136 | args.list = NULL; | |
137 | addargs(&args, "ssh"); /* overwritten with ssh_program */ | |
138 | addargs(&args, "-oForwardX11 no"); | |
139 | addargs(&args, "-oForwardAgent no"); | |
140 | addargs(&args, "-oClearAllForwardings yes"); | |
141 | ll = SYSLOG_LEVEL_INFO; | |
142 | infile = stdin; /* Read from STDIN unless changed by -b */ | |
143 | ||
144 | while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { | |
145 | switch (ch) { | |
146 | case 'C': | |
147 | addargs(&args, "-C"); | |
148 | break; | |
149 | case 'v': | |
150 | if (debug_level < 3) { | |
151 | addargs(&args, "-v"); | |
152 | ll = SYSLOG_LEVEL_DEBUG1 + debug_level; | |
153 | } | |
154 | debug_level++; | |
155 | break; | |
156 | case 'F': | |
157 | case 'o': | |
158 | addargs(&args, "-%c%s", ch, optarg); | |
159 | break; | |
160 | case '1': | |
161 | sshver = 1; | |
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; | |
171 | case 'b': | |
172 | if (infile == stdin) { | |
173 | infile = fopen(optarg, "r"); | |
174 | if (infile == NULL) | |
175 | fatal("%s (%s).", strerror(errno), optarg); | |
176 | } else | |
177 | fatal("Filename already specified."); | |
178 | showprogress = 0; | |
179 | break; | |
180 | case 'P': | |
181 | sftp_direct = optarg; | |
182 | break; | |
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; | |
188 | case 'R': | |
189 | num_requests = strtol(optarg, &cp, 10); | |
190 | if (num_requests == 0 || *cp != '\0') | |
191 | fatal("Invalid number of requests \"%s\"", | |
192 | optarg); | |
193 | break; | |
194 | case 'h': | |
195 | default: | |
196 | usage(); | |
197 | } | |
198 | } | |
199 | ||
200 | log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); | |
201 | ||
202 | if (sftp_direct == NULL) { | |
203 | if (optind == argc || argc > (optind + 2)) | |
204 | usage(); | |
205 | ||
206 | userhost = xstrdup(argv[optind]); | |
207 | file2 = argv[optind+1]; | |
208 | ||
209 | if ((cp = colon(userhost)) != NULL) { | |
210 | *cp++ = '\0'; | |
211 | file1 = cp; | |
212 | } | |
213 | ||
214 | if ((host = strrchr(userhost, '@')) == NULL) | |
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); | |
223 | } | |
224 | ||
225 | host = cleanhostname(host); | |
226 | if (!*host) { | |
227 | fprintf(stderr, "Missing hostname\n"); | |
228 | usage(); | |
229 | } | |
230 | ||
231 | addargs(&args, "-oProtocol %d", sshver); | |
232 | ||
233 | /* no subsystem if the server-spec contains a '/' */ | |
234 | if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) | |
235 | addargs(&args, "-s"); | |
236 | ||
237 | addargs(&args, "%s", host); | |
238 | addargs(&args, "%s", (sftp_server != NULL ? | |
239 | sftp_server : "sftp")); | |
240 | args.list[0] = ssh_program; | |
241 | ||
242 | fprintf(stderr, "Connecting to %s...\n", host); | |
243 | connect_to_server(ssh_program, args.list, &in, &out); | |
244 | } else { | |
245 | args.list = NULL; | |
246 | addargs(&args, "sftp-server"); | |
247 | ||
248 | fprintf(stderr, "Attaching to %s...\n", sftp_direct); | |
249 | connect_to_server(sftp_direct, args.list, &in, &out); | |
250 | } | |
251 | ||
252 | err = interactive_loop(in, out, file1, file2); | |
253 | ||
254 | #if !defined(USE_PIPES) | |
255 | shutdown(in, SHUT_RDWR); | |
256 | shutdown(out, SHUT_RDWR); | |
257 | #endif | |
258 | ||
259 | close(in); | |
260 | close(out); | |
261 | if (infile != stdin) | |
262 | fclose(infile); | |
263 | ||
264 | while (waitpid(sshpid, NULL, 0) == -1) | |
265 | if (errno != EINTR) | |
266 | fatal("Couldn't wait for ssh process: %s", | |
267 | strerror(errno)); | |
268 | ||
269 | exit(err == 0 ? 0 : 1); | |
270 | } |