Commit | Line | Data |
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a039749b | 1 | /* -*- c-file-style: "linux"; -*- |
4a7144ee | 2 | * |
a254fd97 MP |
3 | * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org> |
4 | * Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org> | |
4a7144ee | 5 | * |
a254fd97 MP |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
4a7144ee | 10 | * |
a254fd97 MP |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
4a7144ee | 15 | * |
a254fd97 MP |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
3591c066 | 20 | |
a254fd97 MP |
21 | /** |
22 | * @file | |
23 | * | |
24 | * The socket based protocol for setting up a connection with | |
25 | * rsyncd. | |
26 | **/ | |
3591c066 AT |
27 | |
28 | #include "rsync.h" | |
29 | ||
6e195fe9 WD |
30 | extern int am_sender; |
31 | extern int am_server; | |
32 | extern int am_daemon; | |
33 | extern int am_root; | |
3591c066 AT |
34 | extern int module_id; |
35 | extern int read_only; | |
36 | extern int verbose; | |
37 | extern int rsync_port; | |
6e195fe9 WD |
38 | extern int kludge_around_eof; |
39 | extern int daemon_over_rsh; | |
40 | extern int list_only; | |
b35d0d8e | 41 | extern int sanitize_paths; |
7c2a9e76 | 42 | extern int filesfrom_fd; |
daa598df WD |
43 | extern int remote_protocol; |
44 | extern int protocol_version; | |
6e195fe9 WD |
45 | extern int io_timeout; |
46 | extern int orig_umask; | |
47 | extern int no_detach; | |
48 | extern int default_af_hint; | |
49 | extern char *bind_address; | |
495723bb | 50 | extern struct exclude_list_struct server_exclude_list; |
837cbad9 | 51 | extern char *exclude_path_prefix; |
6e195fe9 WD |
52 | extern char *config_file; |
53 | ||
54 | char *auth_user; | |
3591c066 | 55 | |
be2961da | 56 | /** |
bc363ea9 | 57 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
58 | * function for remote-shell connections is do_cmd(). |
59 | * | |
fdf88d75 MP |
60 | * After negotiating which module to use and reading the server's |
61 | * motd, this hands over to client_run(). Telling the server the | |
62 | * module will cause it to chroot/setuid/etc. | |
63 | * | |
64 | * Instead of doing a transfer, the client may at this stage instead | |
65 | * get a listing of remote modules and exit. | |
be2961da MP |
66 | * |
67 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 68 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 69 | **/ |
3591c066 AT |
70 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
71 | { | |
68f40ebb | 72 | int fd, ret; |
2e94e70e | 73 | char *p, *user = NULL; |
4a7144ee | 74 | |
68f40ebb | 75 | /* this is redundant with code in start_inband_exchange(), but |
4a7144ee WD |
76 | * this short-circuits a problem before we open a socket, and |
77 | * the extra check won't hurt */ | |
f98df1d9 | 78 | if (*path == '/') { |
ff81e809 | 79 | rprintf(FERROR,"ERROR: The remote path must start with a module name not a /\n"); |
f98df1d9 AT |
80 | return -1; |
81 | } | |
82 | ||
bcb7e502 AT |
83 | p = strchr(host, '@'); |
84 | if (p) { | |
85 | user = host; | |
86 | host = p+1; | |
87 | *p = 0; | |
88 | } | |
89 | ||
837cbad9 WD |
90 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
91 | default_af_hint); | |
df5cd107 | 92 | if (fd == -1) |
65417579 | 93 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
94 | |
95 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
96 | ||
97 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
98 | } | |
99 | ||
100 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, int argc) | |
101 | { | |
102 | int i; | |
103 | char *sargs[MAX_ARGS]; | |
104 | int sargc = 0; | |
105 | char line[MAXPATHLEN]; | |
106 | char *p; | |
68f40ebb WD |
107 | |
108 | if (argc == 0 && !am_sender) | |
109 | list_only = 1; | |
110 | ||
111 | if (*path == '/') { | |
112 | rprintf(FERROR, "ERROR: The remote path must start with a module name\n"); | |
113 | return -1; | |
114 | } | |
115 | ||
2e94e70e WD |
116 | if (!user) |
117 | user = getenv("USER"); | |
118 | if (!user) | |
119 | user = getenv("LOGNAME"); | |
68f40ebb | 120 | |
4a7144ee WD |
121 | /* set daemon_over_rsh to false since we need to build the |
122 | * true set of args passed through the rsh/ssh connection; | |
123 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
124 | daemon_over_rsh = 0; |
125 | server_options(sargs, &sargc); | |
3591c066 AT |
126 | |
127 | sargs[sargc++] = "."; | |
128 | ||
4a7144ee | 129 | if (path && *path) |
3591c066 AT |
130 | sargs[sargc++] = path; |
131 | ||
132 | sargs[sargc] = NULL; | |
133 | ||
5a8543b8 | 134 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 135 | |
2e94e70e | 136 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 137 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
138 | return -1; |
139 | } | |
140 | ||
daa598df | 141 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
142 | /* note that read_line strips of \n or \r */ |
143 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
144 | line); | |
3591c066 AT |
145 | return -1; |
146 | } | |
daa598df WD |
147 | if (protocol_version > remote_protocol) |
148 | protocol_version = remote_protocol; | |
3591c066 | 149 | |
2c91d3d3 AT |
150 | p = strchr(path,'/'); |
151 | if (p) *p = 0; | |
68f40ebb | 152 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
153 | if (p) *p = '/'; |
154 | ||
063393d6 MP |
155 | /* Old servers may just drop the connection here, |
156 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 157 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 158 | |
063393d6 | 159 | while (1) { |
2e94e70e | 160 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 161 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
162 | return -1; |
163 | } | |
31593dd6 | 164 | |
31593dd6 | 165 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 166 | auth_client(f_out, user, line+18); |
31593dd6 AT |
167 | continue; |
168 | } | |
31593dd6 | 169 | |
2e94e70e WD |
170 | if (strcmp(line,"@RSYNCD: OK") == 0) |
171 | break; | |
8f04bb36 | 172 | |
cae95647 MP |
173 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
174 | /* This is sent by recent versions of the | |
175 | * server to terminate the listing of modules. | |
176 | * We don't want to go on and transfer | |
177 | * anything; just exit. */ | |
178 | exit(0); | |
179 | } | |
8f04bb36 | 180 | |
136ac7ec | 181 | if (strncmp(line, "@ERROR", 6) == 0) { |
c613d370 | 182 | rprintf(FERROR,"%s\n", line); |
136ac7ec MP |
183 | /* This is always fatal; the server will now |
184 | * close the socket. */ | |
185 | return RERR_STARTCLIENT; | |
186 | } else { | |
c613d370 | 187 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 188 | } |
3591c066 | 189 | } |
7a55d06e | 190 | kludge_around_eof = False; |
3591c066 | 191 | |
68f40ebb WD |
192 | for (i = 0; i < sargc; i++) { |
193 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 194 | } |
68f40ebb | 195 | io_printf(f_out, "\n"); |
3591c066 | 196 | |
daa598df | 197 | if (protocol_version < 23) { |
3f55bd5d | 198 | if (protocol_version == 22 || !am_sender) |
68f40ebb | 199 | io_start_multiplex_in(f_in); |
09b7f5db | 200 | } |
8d9dc9f9 | 201 | |
68f40ebb | 202 | return 0; |
3591c066 AT |
203 | } |
204 | ||
205 | ||
206 | ||
68f40ebb | 207 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 208 | { |
2e94e70e | 209 | int argc = 0; |
b7061c82 WD |
210 | int maxargs; |
211 | char **argv; | |
3591c066 | 212 | char **argp; |
e42c9458 | 213 | char line[MAXPATHLEN]; |
2af27ad9 | 214 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 215 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 216 | char *p; |
09021eab DD |
217 | char *addr = client_addr(f_in); |
218 | char *host = client_name(f_in); | |
874895d5 | 219 | char *name = lp_name(i); |
8638dd48 | 220 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 221 | int start_glob = 0; |
41979ff8 | 222 | int ret; |
2e94e70e | 223 | char *request = NULL; |
56c473b7 AT |
224 | |
225 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
226 | rprintf(FERROR,"rsync denied on module %s from %s (%s)\n", | |
31ec50d7 | 227 | name, host, addr); |
68f40ebb | 228 | io_printf(f_out, "@ERROR: access denied to %s from %s (%s)\n", |
31ec50d7 | 229 | name, host, addr); |
56c473b7 AT |
230 | return -1; |
231 | } | |
3591c066 | 232 | |
68f40ebb | 233 | if (am_daemon && am_server) { |
9e5a5ddb | 234 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
235 | name, host, addr); |
236 | } | |
237 | ||
5e71c444 | 238 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 239 | if (errno) { |
d62bcc17 WD |
240 | rsyserr(FERROR, errno, "failed to open lock file %s", |
241 | lp_lock_file(i)); | |
242 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
243 | lp_lock_file(i)); | |
8d72ef6e AT |
244 | } else { |
245 | rprintf(FERROR,"max connections (%d) reached\n", | |
5e71c444 | 246 | lp_max_connections(i)); |
837cbad9 WD |
247 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
248 | lp_max_connections(i)); | |
8d72ef6e | 249 | } |
0c515f17 AT |
250 | return -1; |
251 | } | |
252 | ||
68f40ebb | 253 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 254 | |
97cb8dc2 | 255 | if (!auth_user) { |
d0d56395 | 256 | rprintf(FERROR,"auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
257 | name, host, addr); |
258 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 259 | return -1; |
d0d56395 AT |
260 | } |
261 | ||
3591c066 AT |
262 | module_id = i; |
263 | ||
6fe05820 | 264 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 265 | |
716baed7 DD |
266 | if (am_root) { |
267 | p = lp_uid(i); | |
268 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 269 | if (!isdigit(*(unsigned char *)p)) { |
716baed7 | 270 | rprintf(FERROR,"Invalid uid %s\n", p); |
68f40ebb | 271 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 272 | return -1; |
4a7144ee | 273 | } |
716baed7 DD |
274 | uid = atoi(p); |
275 | } | |
276 | ||
277 | p = lp_gid(i); | |
278 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 279 | if (!isdigit(*(unsigned char *)p)) { |
716baed7 | 280 | rprintf(FERROR,"Invalid gid %s\n", p); |
68f40ebb | 281 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 282 | return -1; |
4a7144ee | 283 | } |
716baed7 DD |
284 | gid = atoi(p); |
285 | } | |
8ef4ffd6 | 286 | } |
3b2b5345 | 287 | |
4a7144ee WD |
288 | /* TODO: If we're not root, but the configuration requests |
289 | * that we change to some uid other than the current one, then | |
290 | * log a warning. */ | |
291 | ||
292 | /* TODO: Perhaps take a list of gids, and make them into the | |
293 | * supplementary groups. */ | |
8ef4ffd6 | 294 | |
837cbad9 | 295 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
296 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
297 | exclude_path_prefix = ""; | |
837cbad9 | 298 | |
cd64343a | 299 | p = lp_include_from(i); |
357406ec WD |
300 | add_exclude_file(&server_exclude_list, p, |
301 | XFLG_FATAL_ERRORS | XFLG_DEF_INCLUDE); | |
cd64343a DD |
302 | |
303 | p = lp_include(i); | |
357406ec WD |
304 | add_exclude(&server_exclude_list, p, |
305 | XFLG_WORD_SPLIT | XFLG_DEF_INCLUDE); | |
cd64343a | 306 | |
8f3a2d54 | 307 | p = lp_exclude_from(i); |
357406ec WD |
308 | add_exclude_file(&server_exclude_list, p, |
309 | XFLG_FATAL_ERRORS); | |
8f3a2d54 | 310 | |
5805327b | 311 | p = lp_exclude(i); |
357406ec | 312 | add_exclude(&server_exclude_list, p, XFLG_WORD_SPLIT); |
837cbad9 WD |
313 | |
314 | exclude_path_prefix = NULL; | |
8f3a2d54 | 315 | |
45a83540 | 316 | log_init(); |
1a016bfd | 317 | |
8638dd48 | 318 | if (use_chroot) { |
b52c1d9d MP |
319 | /* |
320 | * XXX: The 'use chroot' flag is a fairly reliable | |
321 | * source of confusion, because it fails under two | |
322 | * important circumstances: running as non-root, | |
323 | * running on Win32 (or possibly others). On the | |
324 | * other hand, if you are running as root, then it | |
325 | * might be better to always use chroot. | |
326 | * | |
327 | * So, perhaps if we can't chroot we should just issue | |
328 | * a warning, unless a "require chroot" flag is set, | |
329 | * in which case we fail. | |
330 | */ | |
8638dd48 | 331 | if (chroot(lp_path(i))) { |
a039749b | 332 | rsyserr(FERROR, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 333 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
334 | return -1; |
335 | } | |
3591c066 | 336 | |
59187666 | 337 | if (!push_dir("/")) { |
4a7144ee | 338 | rsyserr(FERROR, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 339 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
340 | return -1; |
341 | } | |
3591c066 | 342 | |
716baed7 | 343 | } else { |
59187666 | 344 | if (!push_dir(lp_path(i))) { |
a039749b | 345 | rsyserr(FERROR, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 346 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
347 | return -1; |
348 | } | |
cb13abfe | 349 | sanitize_paths = 1; |
716baed7 DD |
350 | } |
351 | ||
352 | if (am_root) { | |
715d1f45 MP |
353 | /* XXXX: You could argue that if the daemon is started |
354 | * by a non-root user and they explicitly specify a | |
355 | * gid, then we should try to change to that gid -- | |
356 | * this could be possible if it's already in their | |
357 | * supplementary groups. */ | |
358 | ||
359 | /* TODO: Perhaps we need to document that if rsyncd is | |
360 | * started by somebody other than root it will inherit | |
361 | * all their supplementary groups. */ | |
362 | ||
716baed7 | 363 | if (setgid(gid)) { |
2e94e70e | 364 | rsyserr(FERROR, errno, "setgid %d failed", (int)gid); |
68f40ebb | 365 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
366 | return -1; |
367 | } | |
6969ebcf WD |
368 | #ifdef HAVE_SETGROUPS |
369 | /* Get rid of any supplementary groups this process | |
370 | * might have inheristed. */ | |
371 | if (setgroups(1, &gid)) { | |
372 | rsyserr(FERROR, errno, "setgroups failed"); | |
373 | io_printf(f_out, "@ERROR: setgroups failed\n"); | |
374 | return -1; | |
375 | } | |
376 | #endif | |
3591c066 | 377 | |
716baed7 | 378 | if (setuid(uid)) { |
2e94e70e | 379 | rsyserr(FERROR, errno, "setuid %d failed", (int)uid); |
68f40ebb | 380 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
381 | return -1; |
382 | } | |
383 | ||
6fe05820 | 384 | am_root = (MY_UID() == 0); |
3591c066 AT |
385 | } |
386 | ||
68f40ebb | 387 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 388 | |
b7061c82 WD |
389 | maxargs = MAX_ARGS; |
390 | if (!(argv = new_array(char *, maxargs))) | |
391 | out_of_memory("rsync_module"); | |
3591c066 AT |
392 | argv[argc++] = "rsyncd"; |
393 | ||
394 | while (1) { | |
2e94e70e | 395 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 396 | return -1; |
3591c066 | 397 | |
2e94e70e WD |
398 | if (!*line) |
399 | break; | |
3591c066 | 400 | |
874895d5 AT |
401 | p = line; |
402 | ||
b7061c82 WD |
403 | if (argc == maxargs) { |
404 | maxargs += MAX_ARGS; | |
405 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
406 | out_of_memory("rsync_module"); | |
407 | } | |
2e94e70e | 408 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 409 | out_of_memory("rsync_module"); |
3591c066 | 410 | |
874895d5 | 411 | if (start_glob) { |
1a016bfd | 412 | if (start_glob == 1) { |
7b372642 | 413 | request = strdup(p); |
1a016bfd AT |
414 | start_glob++; |
415 | } | |
b7061c82 | 416 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 417 | } else |
874895d5 | 418 | argc++; |
874895d5 | 419 | |
2e94e70e | 420 | if (strcmp(line, ".") == 0) |
874895d5 | 421 | start_glob = 1; |
3591c066 AT |
422 | } |
423 | ||
4a7144ee | 424 | argp = argv; |
15b7b73d | 425 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 426 | |
7c2a9e76 WD |
427 | if (filesfrom_fd == 0) |
428 | filesfrom_fd = f_in; | |
429 | ||
7b372642 | 430 | if (request) { |
97cb8dc2 | 431 | if (*auth_user) { |
9e5a5ddb WD |
432 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
433 | am_sender ? "on" : "to", | |
97cb8dc2 | 434 | request, auth_user, host, addr); |
d0d56395 | 435 | } else { |
9e5a5ddb WD |
436 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
437 | am_sender ? "on" : "to", | |
d0d56395 AT |
438 | request, host, addr); |
439 | } | |
7b372642 AT |
440 | free(request); |
441 | } | |
442 | ||
15b7b73d | 443 | #ifndef DEBUG |
3591c066 | 444 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
445 | if (verbose > lp_max_verbosity()) |
446 | verbose = lp_max_verbosity(); | |
0199b05f | 447 | #endif |
3591c066 | 448 | |
daa598df | 449 | if (protocol_version < 23) { |
3f55bd5d | 450 | if (protocol_version == 22 || am_sender) |
68f40ebb | 451 | io_start_multiplex_out(f_out); |
554e0a8d | 452 | } |
15b7b73d | 453 | |
4a7144ee WD |
454 | /* For later protocol versions, we don't start multiplexing |
455 | * until we've configured nonblocking in start_server. That | |
456 | * means we're in a sticky situation now: there's no way to | |
457 | * convey errors to the client. */ | |
458 | ||
459 | /* FIXME: Hold off on reporting option processing errors until | |
460 | * we've set up nonblocking and multiplexed IO and can get the | |
461 | * message back to them. */ | |
41979ff8 | 462 | if (!ret) { |
4a7144ee WD |
463 | option_error(); |
464 | exit_cleanup(RERR_UNSUPPORTED); | |
41979ff8 AT |
465 | } |
466 | ||
2e94e70e | 467 | if (lp_timeout(i)) |
81791cfc | 468 | io_timeout = lp_timeout(i); |
81791cfc | 469 | |
68f40ebb | 470 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
471 | |
472 | return 0; | |
473 | } | |
474 | ||
7a6421fa AT |
475 | /* send a list of available modules to the client. Don't list those |
476 | with "list = False". */ | |
3591c066 AT |
477 | static void send_listing(int fd) |
478 | { | |
479 | int n = lp_numservices(); | |
480 | int i; | |
063393d6 | 481 | |
2e94e70e | 482 | for (i = 0; i < n; i++) |
3591c066 | 483 | if (lp_list(i)) |
4a7144ee | 484 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
8f04bb36 | 485 | |
daa598df | 486 | if (protocol_version >= 25) |
063393d6 | 487 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
488 | } |
489 | ||
68f40ebb | 490 | /* this is called when a connection is established to a client |
3591c066 AT |
491 | and we want to start talking. The setup of the system is done from |
492 | here */ | |
68f40ebb | 493 | int start_daemon(int f_in, int f_out) |
3591c066 | 494 | { |
7a6421fa | 495 | char line[200]; |
3591c066 | 496 | char *motd; |
8ef4ffd6 | 497 | int i = -1; |
4cdf25e4 | 498 | |
2e94e70e | 499 | if (!lp_load(config_file, 0)) |
65417579 | 500 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 501 | |
30e8c8e1 DD |
502 | log_init(); |
503 | ||
68f40ebb WD |
504 | if (!am_server) { |
505 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
506 | set_socket_options(f_in, lp_socket_options()); | |
507 | set_nonblocking(f_in); | |
508 | } | |
3591c066 | 509 | |
5a8543b8 | 510 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
511 | |
512 | motd = lp_motd_file(); | |
27d3cdbc | 513 | if (motd && *motd) { |
0090cbdb | 514 | FILE *f = fopen(motd,"r"); |
3591c066 | 515 | while (f && !feof(f)) { |
2e94e70e | 516 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
517 | if (len > 0) { |
518 | line[len] = 0; | |
68f40ebb | 519 | io_printf(f_out, "%s", line); |
3591c066 AT |
520 | } |
521 | } | |
2e94e70e WD |
522 | if (f) |
523 | fclose(f); | |
68f40ebb | 524 | io_printf(f_out, "\n"); |
3591c066 AT |
525 | } |
526 | ||
2e94e70e | 527 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 528 | return -1; |
91eee594 | 529 | |
daa598df | 530 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 531 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 532 | return -1; |
4a7144ee | 533 | } |
daa598df WD |
534 | if (protocol_version > remote_protocol) |
535 | protocol_version = remote_protocol; | |
91eee594 | 536 | |
8ef4ffd6 | 537 | while (i == -1) { |
3591c066 | 538 | line[0] = 0; |
2e94e70e | 539 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 540 | return -1; |
3591c066 | 541 | |
2e94e70e | 542 | if (!*line || strcmp(line,"#list") == 0) { |
68f40ebb | 543 | send_listing(f_out); |
3591c066 | 544 | return -1; |
4a7144ee | 545 | } |
3591c066 AT |
546 | |
547 | if (*line == '#') { | |
548 | /* it's some sort of command that I don't understand */ | |
68f40ebb | 549 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
3591c066 AT |
550 | return -1; |
551 | } | |
552 | ||
553 | i = lp_number(line); | |
554 | if (i == -1) { | |
68f40ebb | 555 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
3591c066 AT |
556 | return -1; |
557 | } | |
3591c066 AT |
558 | } |
559 | ||
68f40ebb | 560 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
561 | } |
562 | ||
563 | ||
564 | int daemon_main(void) | |
565 | { | |
8638dd48 | 566 | char *pid_file; |
1a016bfd | 567 | |
3591c066 | 568 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
569 | int i; |
570 | ||
571 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
572 | * stderr so that library functions (and getopt) don't |
573 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 574 | for (i = 1; i < 3; i++) { |
4a7144ee | 575 | close(i); |
41979ff8 AT |
576 | open("/dev/null", O_RDWR); |
577 | } | |
3eb38818 | 578 | |
68f40ebb | 579 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
580 | } |
581 | ||
13e29995 | 582 | if (!no_detach) |
4a7144ee | 583 | become_daemon(); |
3591c066 | 584 | |
2e94e70e | 585 | if (!lp_load(config_file, 1)) |
65417579 | 586 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 587 | |
45a83540 | 588 | log_init(); |
f9e940ef | 589 | |
9e5a5ddb | 590 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
591 | RSYNC_VERSION, rsync_port); |
592 | /* TODO: If listening on a particular address, then show that | |
593 | * address too. In fact, why not just do inet_ntop on the | |
594 | * local address??? */ | |
e42c9458 | 595 | |
8638dd48 | 596 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
597 | char pidbuf[16]; |
598 | int fd; | |
05b7bab8 | 599 | pid_t pid = getpid(); |
8638dd48 | 600 | cleanup_set_pid(pid); |
ad517ce5 DD |
601 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
602 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
603 | cleanup_set_pid(0); |
604 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
605 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 606 | } |
05b7bab8 | 607 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
608 | write(fd, pidbuf, strlen(pidbuf)); |
609 | close(fd); | |
8638dd48 DD |
610 | } |
611 | ||
8ef4ffd6 AT |
612 | start_accept_loop(rsync_port, start_daemon); |
613 | return -1; | |
3591c066 | 614 | } |