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1 | /* | |
2 | * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "includes.h" | |
18 | ||
19 | RCSID("$OpenBSD: sftp.c,v 1.42 2004/02/17 05:39:51 djm Exp $"); | |
20 | ||
21 | #include "buffer.h" | |
22 | #include "xmalloc.h" | |
23 | #include "log.h" | |
24 | #include "pathnames.h" | |
25 | #include "misc.h" | |
26 | ||
27 | #include "sftp.h" | |
28 | #include "sftp-common.h" | |
29 | #include "sftp-client.h" | |
30 | #include "sftp-int.h" | |
31 | ||
32 | #ifdef HAVE___PROGNAME | |
33 | extern char *__progname; | |
34 | #else | |
35 | char *__progname; | |
36 | #endif | |
37 | ||
38 | FILE* infile; | |
39 | int batchmode = 0; | |
40 | size_t copy_buffer_len = 32768; | |
41 | size_t num_requests = 16; | |
42 | static pid_t sshpid = -1; | |
43 | ||
44 | extern int showprogress; | |
45 | ||
46 | static void | |
47 | killchild(int signo) | |
48 | { | |
49 | if (sshpid > 1) | |
50 | kill(sshpid, signo); | |
51 | ||
52 | _exit(1); | |
53 | } | |
54 | ||
55 | static void | |
56 | connect_to_server(char *path, char **args, int *in, int *out) | |
57 | { | |
58 | int c_in, c_out; | |
59 | ||
60 | #ifdef USE_PIPES | |
61 | int pin[2], pout[2]; | |
62 | ||
63 | if ((pipe(pin) == -1) || (pipe(pout) == -1)) | |
64 | fatal("pipe: %s", strerror(errno)); | |
65 | *in = pin[0]; | |
66 | *out = pout[1]; | |
67 | c_in = pout[0]; | |
68 | c_out = pin[1]; | |
69 | #else /* USE_PIPES */ | |
70 | int inout[2]; | |
71 | ||
72 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) | |
73 | fatal("socketpair: %s", strerror(errno)); | |
74 | *in = *out = inout[0]; | |
75 | c_in = c_out = inout[1]; | |
76 | #endif /* USE_PIPES */ | |
77 | ||
78 | if ((sshpid = fork()) == -1) | |
79 | fatal("fork: %s", strerror(errno)); | |
80 | else if (sshpid == 0) { | |
81 | if ((dup2(c_in, STDIN_FILENO) == -1) || | |
82 | (dup2(c_out, STDOUT_FILENO) == -1)) { | |
83 | fprintf(stderr, "dup2: %s\n", strerror(errno)); | |
84 | exit(1); | |
85 | } | |
86 | close(*in); | |
87 | close(*out); | |
88 | close(c_in); | |
89 | close(c_out); | |
90 | execv(path, args); | |
91 | fprintf(stderr, "exec: %s: %s\n", path, strerror(errno)); | |
92 | exit(1); | |
93 | } | |
94 | ||
95 | signal(SIGTERM, killchild); | |
96 | signal(SIGINT, killchild); | |
97 | signal(SIGHUP, killchild); | |
98 | close(c_in); | |
99 | close(c_out); | |
100 | } | |
101 | ||
102 | static void | |
103 | usage(void) | |
104 | { | |
105 | extern char *__progname; | |
106 | ||
107 | fprintf(stderr, | |
108 | "usage: %s [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n" | |
109 | " [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n" | |
110 | " [-S program] [-s subsystem | sftp_server] host\n" | |
111 | " %s [[user@]host[:file [file]]]\n" | |
112 | " %s [[user@]host[:dir[/]]]\n" | |
113 | " %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname); | |
114 | exit(1); | |
115 | } | |
116 | ||
117 | int | |
118 | main(int argc, char **argv) | |
119 | { | |
120 | int in, out, ch, err; | |
121 | char *host, *userhost, *cp, *file2; | |
122 | int debug_level = 0, sshver = 2; | |
123 | char *file1 = NULL, *sftp_server = NULL; | |
124 | char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; | |
125 | LogLevel ll = SYSLOG_LEVEL_INFO; | |
126 | arglist args; | |
127 | extern int optind; | |
128 | extern char *optarg; | |
129 | ||
130 | __progname = ssh_get_progname(argv[0]); | |
131 | args.list = NULL; | |
132 | addargs(&args, "ssh"); /* overwritten with ssh_program */ | |
133 | addargs(&args, "-oForwardX11 no"); | |
134 | addargs(&args, "-oForwardAgent no"); | |
135 | addargs(&args, "-oClearAllForwardings yes"); | |
136 | ||
137 | ll = SYSLOG_LEVEL_INFO; | |
138 | infile = stdin; | |
139 | ||
140 | while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { | |
141 | switch (ch) { | |
142 | case 'C': | |
143 | addargs(&args, "-C"); | |
144 | break; | |
145 | case 'v': | |
146 | if (debug_level < 3) { | |
147 | addargs(&args, "-v"); | |
148 | ll = SYSLOG_LEVEL_DEBUG1 + debug_level; | |
149 | } | |
150 | debug_level++; | |
151 | break; | |
152 | case 'F': | |
153 | case 'o': | |
154 | addargs(&args, "-%c%s", ch, optarg); | |
155 | break; | |
156 | case '1': | |
157 | sshver = 1; | |
158 | if (sftp_server == NULL) | |
159 | sftp_server = _PATH_SFTP_SERVER; | |
160 | break; | |
161 | case 's': | |
162 | sftp_server = optarg; | |
163 | break; | |
164 | case 'S': | |
165 | ssh_program = optarg; | |
166 | break; | |
167 | case 'b': | |
168 | if (batchmode) | |
169 | fatal("Batch file already specified."); | |
170 | ||
171 | /* Allow "-" as stdin */ | |
172 | if (strcmp(optarg, "-") != 0 && | |
173 | (infile = fopen(optarg, "r")) == NULL) | |
174 | fatal("%s (%s).", strerror(errno), optarg); | |
175 | showprogress = 0; | |
176 | batchmode = 1; | |
177 | break; | |
178 | case 'P': | |
179 | sftp_direct = optarg; | |
180 | break; | |
181 | case 'B': | |
182 | copy_buffer_len = strtol(optarg, &cp, 10); | |
183 | if (copy_buffer_len == 0 || *cp != '\0') | |
184 | fatal("Invalid buffer size \"%s\"", optarg); | |
185 | break; | |
186 | case 'R': | |
187 | num_requests = strtol(optarg, &cp, 10); | |
188 | if (num_requests == 0 || *cp != '\0') | |
189 | fatal("Invalid number of requests \"%s\"", | |
190 | optarg); | |
191 | break; | |
192 | case 'h': | |
193 | default: | |
194 | usage(); | |
195 | } | |
196 | } | |
197 | ||
198 | log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); | |
199 | ||
200 | if (sftp_direct == NULL) { | |
201 | if (optind == argc || argc > (optind + 2)) | |
202 | usage(); | |
203 | ||
204 | userhost = xstrdup(argv[optind]); | |
205 | file2 = argv[optind+1]; | |
206 | ||
207 | if ((host = strrchr(userhost, '@')) == NULL) | |
208 | host = userhost; | |
209 | else { | |
210 | *host++ = '\0'; | |
211 | if (!userhost[0]) { | |
212 | fprintf(stderr, "Missing username\n"); | |
213 | usage(); | |
214 | } | |
215 | addargs(&args, "-l%s",userhost); | |
216 | } | |
217 | ||
218 | if ((cp = colon(host)) != NULL) { | |
219 | *cp++ = '\0'; | |
220 | file1 = cp; | |
221 | } | |
222 | ||
223 | host = cleanhostname(host); | |
224 | if (!*host) { | |
225 | fprintf(stderr, "Missing hostname\n"); | |
226 | usage(); | |
227 | } | |
228 | ||
229 | addargs(&args, "-oProtocol %d", sshver); | |
230 | ||
231 | /* no subsystem if the server-spec contains a '/' */ | |
232 | if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) | |
233 | addargs(&args, "-s"); | |
234 | ||
235 | addargs(&args, "%s", host); | |
236 | addargs(&args, "%s", (sftp_server != NULL ? | |
237 | sftp_server : "sftp")); | |
238 | args.list[0] = ssh_program; | |
239 | ||
240 | if (!batchmode) | |
241 | fprintf(stderr, "Connecting to %s...\n", host); | |
242 | connect_to_server(ssh_program, args.list, &in, &out); | |
243 | } else { | |
244 | args.list = NULL; | |
245 | addargs(&args, "sftp-server"); | |
246 | ||
247 | if (!batchmode) | |
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 (batchmode) | |
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 | } |