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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 1.38 2003/10/08 08:27:36 jmc 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 [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n" | |
116 | " [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n" | |
117 | " [-S program] [-s subsystem | sftp_server] host\n" | |
118 | " %s [[user@]host[:file [file]]]\n" | |
119 | " %s [[user@]host[:dir[/]]]\n" | |
120 | " %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname); | |
121 | exit(1); | |
122 | } | |
123 | ||
124 | int | |
125 | main(int argc, char **argv) | |
126 | { | |
127 | int in, out, ch, err; | |
128 | char *host, *userhost, *cp, *file2; | |
129 | int debug_level = 0, sshver = 2; | |
130 | char *file1 = NULL, *sftp_server = NULL; | |
131 | char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; | |
132 | LogLevel ll = SYSLOG_LEVEL_INFO; | |
133 | arglist args; | |
134 | extern int optind; | |
135 | extern char *optarg; | |
136 | ||
137 | __progname = ssh_get_progname(argv[0]); | |
138 | args.list = NULL; | |
139 | addargs(&args, "ssh"); /* overwritten with ssh_program */ | |
140 | addargs(&args, "-oForwardX11 no"); | |
141 | addargs(&args, "-oForwardAgent no"); | |
142 | addargs(&args, "-oClearAllForwardings yes"); | |
143 | ll = SYSLOG_LEVEL_INFO; | |
144 | infile = stdin; /* Read from STDIN unless changed by -b */ | |
145 | ||
146 | while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { | |
147 | switch (ch) { | |
148 | case 'C': | |
149 | addargs(&args, "-C"); | |
150 | break; | |
151 | case 'v': | |
152 | if (debug_level < 3) { | |
153 | addargs(&args, "-v"); | |
154 | ll = SYSLOG_LEVEL_DEBUG1 + debug_level; | |
155 | } | |
156 | debug_level++; | |
157 | break; | |
158 | case 'F': | |
159 | case 'o': | |
160 | addargs(&args, "-%c%s", ch, optarg); | |
161 | break; | |
162 | case '1': | |
163 | sshver = 1; | |
164 | if (sftp_server == NULL) | |
165 | sftp_server = _PATH_SFTP_SERVER; | |
166 | break; | |
167 | case 's': | |
168 | sftp_server = optarg; | |
169 | break; | |
170 | case 'S': | |
171 | ssh_program = optarg; | |
172 | break; | |
173 | case 'b': | |
174 | if (infile == stdin) { | |
175 | infile = fopen(optarg, "r"); | |
176 | if (infile == NULL) | |
177 | fatal("%s (%s).", strerror(errno), optarg); | |
178 | } else | |
179 | fatal("Filename already specified."); | |
180 | showprogress = 0; | |
181 | break; | |
182 | case 'P': | |
183 | sftp_direct = optarg; | |
184 | break; | |
185 | case 'B': | |
186 | copy_buffer_len = strtol(optarg, &cp, 10); | |
187 | if (copy_buffer_len == 0 || *cp != '\0') | |
188 | fatal("Invalid buffer size \"%s\"", optarg); | |
189 | break; | |
190 | case 'R': | |
191 | num_requests = strtol(optarg, &cp, 10); | |
192 | if (num_requests == 0 || *cp != '\0') | |
193 | fatal("Invalid number of requests \"%s\"", | |
194 | optarg); | |
195 | break; | |
196 | case 'h': | |
197 | default: | |
198 | usage(); | |
199 | } | |
200 | } | |
201 | ||
202 | log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); | |
203 | ||
204 | if (sftp_direct == NULL) { | |
205 | if (optind == argc || argc > (optind + 2)) | |
206 | usage(); | |
207 | ||
208 | userhost = xstrdup(argv[optind]); | |
209 | file2 = argv[optind+1]; | |
210 | ||
211 | if ((cp = colon(userhost)) != NULL) { | |
212 | *cp++ = '\0'; | |
213 | file1 = cp; | |
214 | } | |
215 | ||
216 | if ((host = strrchr(userhost, '@')) == NULL) | |
217 | host = userhost; | |
218 | else { | |
219 | *host++ = '\0'; | |
220 | if (!userhost[0]) { | |
221 | fprintf(stderr, "Missing username\n"); | |
222 | usage(); | |
223 | } | |
224 | addargs(&args, "-l%s",userhost); | |
225 | } | |
226 | ||
227 | host = cleanhostname(host); | |
228 | if (!*host) { | |
229 | fprintf(stderr, "Missing hostname\n"); | |
230 | usage(); | |
231 | } | |
232 | ||
233 | addargs(&args, "-oProtocol %d", sshver); | |
234 | ||
235 | /* no subsystem if the server-spec contains a '/' */ | |
236 | if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) | |
237 | addargs(&args, "-s"); | |
238 | ||
239 | addargs(&args, "%s", host); | |
240 | addargs(&args, "%s", (sftp_server != NULL ? | |
241 | sftp_server : "sftp")); | |
242 | args.list[0] = ssh_program; | |
243 | ||
244 | fprintf(stderr, "Connecting to %s...\n", host); | |
245 | connect_to_server(ssh_program, args.list, &in, &out); | |
246 | } else { | |
247 | args.list = NULL; | |
248 | addargs(&args, "sftp-server"); | |
249 | ||
250 | fprintf(stderr, "Attaching to %s...\n", sftp_direct); | |
251 | connect_to_server(sftp_direct, args.list, &in, &out); | |
252 | } | |
253 | ||
254 | err = interactive_loop(in, out, file1, file2); | |
255 | ||
256 | #if !defined(USE_PIPES) | |
257 | shutdown(in, SHUT_RDWR); | |
258 | shutdown(out, SHUT_RDWR); | |
259 | #endif | |
260 | ||
261 | close(in); | |
262 | close(out); | |
263 | if (infile != stdin) | |
264 | fclose(infile); | |
265 | ||
266 | while (waitpid(sshpid, NULL, 0) == -1) | |
267 | if (errno != EINTR) | |
268 | fatal("Couldn't wait for ssh process: %s", | |
269 | strerror(errno)); | |
270 | ||
271 | exit(err == 0 ? 0 : 1); | |
272 | } |