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 | ||
c0814b81 WD |
30 | extern int verbose; |
31 | extern int list_only; | |
6e195fe9 WD |
32 | extern int am_sender; |
33 | extern int am_server; | |
34 | extern int am_daemon; | |
35 | extern int am_root; | |
3591c066 | 36 | extern int rsync_port; |
8dad7fc6 | 37 | extern int kluge_around_eof; |
6e195fe9 | 38 | extern int daemon_over_rsh; |
b35d0d8e | 39 | extern int sanitize_paths; |
7c2a9e76 | 40 | extern int filesfrom_fd; |
daa598df WD |
41 | extern int remote_protocol; |
42 | extern int protocol_version; | |
6e195fe9 WD |
43 | extern int io_timeout; |
44 | extern int orig_umask; | |
45 | extern int no_detach; | |
46 | extern int default_af_hint; | |
47 | extern char *bind_address; | |
7842418b | 48 | extern struct filter_list_struct server_filter_list; |
6e195fe9 | 49 | extern char *config_file; |
bf4679e8 | 50 | extern char *files_from; |
6e195fe9 WD |
51 | |
52 | char *auth_user; | |
18638730 | 53 | int read_only = 0; |
f39b2060 WD |
54 | int daemon_log_format_has_i = 0; |
55 | int daemon_log_format_has_o_or_i = 0; | |
211bc43b | 56 | int module_id = -1; |
3591c066 | 57 | |
e7bf7c01 WD |
58 | /* Length of lp_path() string when in daemon mode & not chrooted, else 0. */ |
59 | unsigned int module_dirlen = 0; | |
60 | ||
be2961da | 61 | /** |
bc363ea9 | 62 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
63 | * function for remote-shell connections is do_cmd(). |
64 | * | |
fdf88d75 MP |
65 | * After negotiating which module to use and reading the server's |
66 | * motd, this hands over to client_run(). Telling the server the | |
67 | * module will cause it to chroot/setuid/etc. | |
68 | * | |
69 | * Instead of doing a transfer, the client may at this stage instead | |
70 | * get a listing of remote modules and exit. | |
be2961da MP |
71 | * |
72 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 73 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 74 | **/ |
3591c066 AT |
75 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
76 | { | |
68f40ebb | 77 | int fd, ret; |
2e94e70e | 78 | char *p, *user = NULL; |
4a7144ee | 79 | |
1732b6c0 WD |
80 | /* This is redundant with code in start_inband_exchange(), but this |
81 | * short-circuits a problem in the client before we open a socket, | |
82 | * and the extra check won't hurt. */ | |
f98df1d9 | 83 | if (*path == '/') { |
1732b6c0 WD |
84 | rprintf(FERROR, |
85 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
86 | return -1; |
87 | } | |
88 | ||
b31c92ed | 89 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
90 | user = host; |
91 | host = p+1; | |
1732b6c0 | 92 | *p = '\0'; |
bcb7e502 AT |
93 | } |
94 | ||
837cbad9 WD |
95 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
96 | default_af_hint); | |
df5cd107 | 97 | if (fd == -1) |
65417579 | 98 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
99 | |
100 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
101 | ||
180443af | 102 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
103 | } |
104 | ||
b9f592fb WD |
105 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
106 | int argc) | |
68f40ebb WD |
107 | { |
108 | int i; | |
109 | char *sargs[MAX_ARGS]; | |
110 | int sargc = 0; | |
111 | char line[MAXPATHLEN]; | |
112 | char *p; | |
68f40ebb WD |
113 | |
114 | if (argc == 0 && !am_sender) | |
9bcb2595 | 115 | list_only |= 1; |
68f40ebb WD |
116 | |
117 | if (*path == '/') { | |
1732b6c0 WD |
118 | rprintf(FERROR, |
119 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
120 | return -1; |
121 | } | |
122 | ||
2e94e70e WD |
123 | if (!user) |
124 | user = getenv("USER"); | |
125 | if (!user) | |
126 | user = getenv("LOGNAME"); | |
68f40ebb | 127 | |
5a8543b8 | 128 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 129 | |
2e94e70e | 130 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 131 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
132 | return -1; |
133 | } | |
134 | ||
daa598df | 135 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
136 | /* note that read_line strips of \n or \r */ |
137 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
138 | line); | |
3591c066 AT |
139 | return -1; |
140 | } | |
daa598df WD |
141 | if (protocol_version > remote_protocol) |
142 | protocol_version = remote_protocol; | |
3591c066 | 143 | |
9bcb2595 WD |
144 | if (list_only && protocol_version >= 29) |
145 | list_only |= 2; | |
146 | ||
147 | /* set daemon_over_rsh to false since we need to build the | |
148 | * true set of args passed through the rsh/ssh connection; | |
149 | * this is a no-op for direct-socket-connection mode */ | |
150 | daemon_over_rsh = 0; | |
151 | server_options(sargs, &sargc); | |
152 | ||
153 | sargs[sargc++] = "."; | |
154 | ||
155 | if (path && *path) | |
156 | sargs[sargc++] = path; | |
157 | ||
158 | sargs[sargc] = NULL; | |
159 | ||
160 | if (verbose > 1) | |
161 | print_child_argv(sargs); | |
162 | ||
2c91d3d3 AT |
163 | p = strchr(path,'/'); |
164 | if (p) *p = 0; | |
68f40ebb | 165 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
166 | if (p) *p = '/'; |
167 | ||
063393d6 MP |
168 | /* Old servers may just drop the connection here, |
169 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 170 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 171 | |
063393d6 | 172 | while (1) { |
2e94e70e | 173 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 174 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
175 | return -1; |
176 | } | |
31593dd6 | 177 | |
31593dd6 | 178 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 179 | auth_client(f_out, user, line+18); |
31593dd6 AT |
180 | continue; |
181 | } | |
31593dd6 | 182 | |
2e94e70e WD |
183 | if (strcmp(line,"@RSYNCD: OK") == 0) |
184 | break; | |
8f04bb36 | 185 | |
cae95647 MP |
186 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
187 | /* This is sent by recent versions of the | |
188 | * server to terminate the listing of modules. | |
189 | * We don't want to go on and transfer | |
190 | * anything; just exit. */ | |
191 | exit(0); | |
192 | } | |
8f04bb36 | 193 | |
136ac7ec | 194 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 195 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
196 | /* This is always fatal; the server will now |
197 | * close the socket. */ | |
180443af | 198 | return -1; |
136ac7ec | 199 | } |
180443af WD |
200 | |
201 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 202 | } |
8dad7fc6 | 203 | kluge_around_eof = 0; |
3591c066 | 204 | |
68f40ebb WD |
205 | for (i = 0; i < sargc; i++) { |
206 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 207 | } |
68f40ebb | 208 | io_printf(f_out, "\n"); |
3591c066 | 209 | |
daa598df | 210 | if (protocol_version < 23) { |
3f55bd5d | 211 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 212 | io_start_multiplex_in(); |
09b7f5db | 213 | } |
8d9dc9f9 | 214 | |
68f40ebb | 215 | return 0; |
3591c066 AT |
216 | } |
217 | ||
218 | ||
219 | ||
68f40ebb | 220 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 221 | { |
2e94e70e | 222 | int argc = 0; |
b7061c82 WD |
223 | int maxargs; |
224 | char **argv; | |
3591c066 | 225 | char **argp; |
e42c9458 | 226 | char line[MAXPATHLEN]; |
2af27ad9 | 227 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 228 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 229 | char *p; |
09021eab DD |
230 | char *addr = client_addr(f_in); |
231 | char *host = client_name(f_in); | |
874895d5 | 232 | char *name = lp_name(i); |
8638dd48 | 233 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 234 | int start_glob = 0; |
41979ff8 | 235 | int ret; |
2e94e70e | 236 | char *request = NULL; |
56c473b7 AT |
237 | |
238 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 239 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 240 | name, host, addr); |
c0422cea WD |
241 | if (!lp_list(i)) |
242 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
243 | else { | |
244 | io_printf(f_out, | |
245 | "@ERROR: access denied to %s from %s (%s)\n", | |
246 | name, host, addr); | |
247 | } | |
56c473b7 AT |
248 | return -1; |
249 | } | |
3591c066 | 250 | |
68f40ebb | 251 | if (am_daemon && am_server) { |
9e5a5ddb | 252 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
253 | name, host, addr); |
254 | } | |
255 | ||
5e71c444 | 256 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 257 | if (errno) { |
1732b6c0 | 258 | rsyserr(FLOG, errno, "failed to open lock file %s", |
4875d6b6 WD |
259 | safe_fname(lp_lock_file(i))); |
260 | io_printf(f_out, "@ERROR: failed to open lock file\n"); | |
8d72ef6e | 261 | } else { |
1732b6c0 | 262 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 263 | lp_max_connections(i)); |
4ccfd96c | 264 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 265 | lp_max_connections(i)); |
8d72ef6e | 266 | } |
0c515f17 AT |
267 | return -1; |
268 | } | |
269 | ||
45c5b903 | 270 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 271 | |
97cb8dc2 | 272 | if (!auth_user) { |
68f40ebb | 273 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 274 | return -1; |
d0d56395 AT |
275 | } |
276 | ||
3591c066 AT |
277 | module_id = i; |
278 | ||
211bc43b | 279 | if (lp_read_only(i)) |
18638730 WD |
280 | read_only = 1; |
281 | ||
f39b2060 | 282 | if (lp_transfer_logging(i)) { |
624d6be2 | 283 | if (log_format_has(lp_log_format(i), 'i')) |
f39b2060 WD |
284 | daemon_log_format_has_i = 1; |
285 | if (daemon_log_format_has_i | |
624d6be2 | 286 | || log_format_has(lp_log_format(i), 'o')) |
f39b2060 WD |
287 | daemon_log_format_has_o_or_i = 1; |
288 | } | |
c0814b81 | 289 | |
6fe05820 | 290 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 291 | |
716baed7 DD |
292 | if (am_root) { |
293 | p = lp_uid(i); | |
294 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 295 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 296 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 297 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 298 | return -1; |
4a7144ee | 299 | } |
716baed7 DD |
300 | uid = atoi(p); |
301 | } | |
302 | ||
303 | p = lp_gid(i); | |
304 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 305 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 306 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 307 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 308 | return -1; |
4a7144ee | 309 | } |
716baed7 DD |
310 | gid = atoi(p); |
311 | } | |
8ef4ffd6 | 312 | } |
3b2b5345 | 313 | |
4a7144ee WD |
314 | /* TODO: If we're not root, but the configuration requests |
315 | * that we change to some uid other than the current one, then | |
316 | * log a warning. */ | |
317 | ||
318 | /* TODO: Perhaps take a list of gids, and make them into the | |
319 | * supplementary groups. */ | |
8ef4ffd6 | 320 | |
46bffd98 | 321 | if (use_chroot || (module_dirlen = strlen(lp_path(i))) == 1) { |
e7bf7c01 | 322 | module_dirlen = 0; |
7842418b | 323 | set_filter_dir("/", 1); |
46bffd98 | 324 | } else |
7842418b | 325 | set_filter_dir(lp_path(i), module_dirlen); |
e7bf7c01 WD |
326 | |
327 | p = lp_filter(i); | |
ebfd1a1c | 328 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
0a68f869 | 329 | XFLG_ANCHORED2ABS); |
837cbad9 | 330 | |
cd64343a | 331 | p = lp_include_from(i); |
ebfd1a1c | 332 | parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE, |
0a68f869 | 333 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
334 | |
335 | p = lp_include(i); | |
ebfd1a1c | 336 | parse_rule(&server_filter_list, p, |
0a68f869 WD |
337 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
338 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES); | |
cd64343a | 339 | |
8f3a2d54 | 340 | p = lp_exclude_from(i); |
ebfd1a1c | 341 | parse_filter_file(&server_filter_list, p, 0, |
0a68f869 | 342 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 343 | |
5805327b | 344 | p = lp_exclude(i); |
ebfd1a1c | 345 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
0a68f869 | 346 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES); |
8f3a2d54 | 347 | |
45a83540 | 348 | log_init(); |
1a016bfd | 349 | |
8638dd48 | 350 | if (use_chroot) { |
b52c1d9d MP |
351 | /* |
352 | * XXX: The 'use chroot' flag is a fairly reliable | |
353 | * source of confusion, because it fails under two | |
354 | * important circumstances: running as non-root, | |
355 | * running on Win32 (or possibly others). On the | |
356 | * other hand, if you are running as root, then it | |
357 | * might be better to always use chroot. | |
358 | * | |
359 | * So, perhaps if we can't chroot we should just issue | |
360 | * a warning, unless a "require chroot" flag is set, | |
361 | * in which case we fail. | |
362 | */ | |
8638dd48 | 363 | if (chroot(lp_path(i))) { |
4875d6b6 WD |
364 | rsyserr(FLOG, errno, "chroot %s failed", |
365 | safe_fname(lp_path(i))); | |
68f40ebb | 366 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
367 | return -1; |
368 | } | |
3591c066 | 369 | |
59187666 | 370 | if (!push_dir("/")) { |
4875d6b6 WD |
371 | rsyserr(FLOG, errno, "chdir %s failed\n", |
372 | safe_fname(lp_path(i))); | |
68f40ebb | 373 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
374 | return -1; |
375 | } | |
3591c066 | 376 | |
716baed7 | 377 | } else { |
59187666 | 378 | if (!push_dir(lp_path(i))) { |
4875d6b6 WD |
379 | rsyserr(FLOG, errno, "chdir %s failed\n", |
380 | safe_fname(lp_path(i))); | |
68f40ebb | 381 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
382 | return -1; |
383 | } | |
cb13abfe | 384 | sanitize_paths = 1; |
716baed7 DD |
385 | } |
386 | ||
387 | if (am_root) { | |
715d1f45 MP |
388 | /* XXXX: You could argue that if the daemon is started |
389 | * by a non-root user and they explicitly specify a | |
390 | * gid, then we should try to change to that gid -- | |
391 | * this could be possible if it's already in their | |
392 | * supplementary groups. */ | |
393 | ||
394 | /* TODO: Perhaps we need to document that if rsyncd is | |
395 | * started by somebody other than root it will inherit | |
396 | * all their supplementary groups. */ | |
397 | ||
716baed7 | 398 | if (setgid(gid)) { |
1732b6c0 | 399 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 400 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
401 | return -1; |
402 | } | |
4f5b0756 | 403 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
404 | /* Get rid of any supplementary groups this process |
405 | * might have inheristed. */ | |
406 | if (setgroups(1, &gid)) { | |
1732b6c0 | 407 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
408 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
409 | return -1; | |
410 | } | |
411 | #endif | |
3591c066 | 412 | |
716baed7 | 413 | if (setuid(uid)) { |
1732b6c0 | 414 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 415 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
416 | return -1; |
417 | } | |
418 | ||
6fe05820 | 419 | am_root = (MY_UID() == 0); |
3591c066 AT |
420 | } |
421 | ||
68f40ebb | 422 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 423 | |
b7061c82 WD |
424 | maxargs = MAX_ARGS; |
425 | if (!(argv = new_array(char *, maxargs))) | |
426 | out_of_memory("rsync_module"); | |
3591c066 AT |
427 | argv[argc++] = "rsyncd"; |
428 | ||
429 | while (1) { | |
2e94e70e | 430 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 431 | return -1; |
3591c066 | 432 | |
2e94e70e WD |
433 | if (!*line) |
434 | break; | |
3591c066 | 435 | |
874895d5 AT |
436 | p = line; |
437 | ||
b7061c82 WD |
438 | if (argc == maxargs) { |
439 | maxargs += MAX_ARGS; | |
440 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
441 | out_of_memory("rsync_module"); | |
442 | } | |
2e94e70e | 443 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 444 | out_of_memory("rsync_module"); |
3591c066 | 445 | |
874895d5 | 446 | if (start_glob) { |
1a016bfd | 447 | if (start_glob == 1) { |
7b372642 | 448 | request = strdup(p); |
1a016bfd AT |
449 | start_glob++; |
450 | } | |
b7061c82 | 451 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 452 | } else |
874895d5 | 453 | argc++; |
874895d5 | 454 | |
2e94e70e | 455 | if (strcmp(line, ".") == 0) |
874895d5 | 456 | start_glob = 1; |
3591c066 AT |
457 | } |
458 | ||
18638730 | 459 | verbose = 0; /* future verbosity is controlled by client options */ |
4a7144ee | 460 | argp = argv; |
15b7b73d | 461 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 462 | |
7c2a9e76 WD |
463 | if (filesfrom_fd == 0) |
464 | filesfrom_fd = f_in; | |
465 | ||
7b372642 | 466 | if (request) { |
97cb8dc2 | 467 | if (*auth_user) { |
9e5a5ddb WD |
468 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
469 | am_sender ? "on" : "to", | |
97cb8dc2 | 470 | request, auth_user, host, addr); |
d0d56395 | 471 | } else { |
9e5a5ddb WD |
472 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
473 | am_sender ? "on" : "to", | |
d0d56395 AT |
474 | request, host, addr); |
475 | } | |
7b372642 AT |
476 | free(request); |
477 | } | |
478 | ||
15b7b73d | 479 | #ifndef DEBUG |
3591c066 | 480 | /* don't allow the logs to be flooded too fast */ |
59b0e7a8 WD |
481 | if (verbose > lp_max_verbosity(i)) |
482 | verbose = lp_max_verbosity(i); | |
0199b05f | 483 | #endif |
3591c066 | 484 | |
1732b6c0 WD |
485 | if (protocol_version < 23 |
486 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 487 | io_start_multiplex_out(); |
1732b6c0 WD |
488 | else if (!ret) { |
489 | /* We have to get I/O multiplexing started so that we can | |
490 | * get the error back to the client. This means getting | |
491 | * the protocol setup finished first in later versions. */ | |
492 | setup_protocol(f_out, f_in); | |
b03c719f WD |
493 | if (!am_sender) { |
494 | /* Since we failed in our option parsing, we may not | |
495 | * have finished parsing that the client sent us a | |
496 | * --files-from option, so look for it manually. | |
497 | * Without this, the socket would be in the wrong | |
498 | * state for the upcoming error message. */ | |
499 | if (!files_from) { | |
500 | int i; | |
501 | for (i = 0; i < argc; i++) { | |
502 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
503 | files_from = ""; | |
504 | break; | |
505 | } | |
506 | } | |
507 | } | |
508 | if (files_from) | |
509 | write_byte(f_out, 0); | |
510 | } | |
da3478b2 | 511 | io_start_multiplex_out(); |
554e0a8d | 512 | } |
15b7b73d | 513 | |
41979ff8 | 514 | if (!ret) { |
4a7144ee | 515 | option_error(); |
7e561438 | 516 | msleep(400); |
4a7144ee | 517 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
518 | } |
519 | ||
3e6ddb37 WD |
520 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
521 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 522 | |
68f40ebb | 523 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
524 | |
525 | return 0; | |
526 | } | |
527 | ||
7a6421fa AT |
528 | /* send a list of available modules to the client. Don't list those |
529 | with "list = False". */ | |
3591c066 AT |
530 | static void send_listing(int fd) |
531 | { | |
532 | int n = lp_numservices(); | |
533 | int i; | |
063393d6 | 534 | |
c0422cea | 535 | for (i = 0; i < n; i++) { |
3591c066 | 536 | if (lp_list(i)) |
4a7144ee | 537 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 538 | } |
8f04bb36 | 539 | |
daa598df | 540 | if (protocol_version >= 25) |
063393d6 | 541 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
542 | } |
543 | ||
68f40ebb | 544 | /* this is called when a connection is established to a client |
3591c066 AT |
545 | and we want to start talking. The setup of the system is done from |
546 | here */ | |
68f40ebb | 547 | int start_daemon(int f_in, int f_out) |
3591c066 | 548 | { |
7a6421fa | 549 | char line[200]; |
3591c066 | 550 | char *motd; |
c0422cea | 551 | int i; |
4cdf25e4 | 552 | |
da3478b2 WD |
553 | io_set_sock_fds(f_in, f_out); |
554 | ||
2e94e70e | 555 | if (!lp_load(config_file, 0)) |
65417579 | 556 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 557 | |
30e8c8e1 DD |
558 | log_init(); |
559 | ||
68f40ebb WD |
560 | if (!am_server) { |
561 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
562 | set_socket_options(f_in, lp_socket_options()); | |
563 | set_nonblocking(f_in); | |
564 | } | |
3591c066 | 565 | |
5a8543b8 | 566 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
567 | |
568 | motd = lp_motd_file(); | |
27d3cdbc | 569 | if (motd && *motd) { |
0090cbdb | 570 | FILE *f = fopen(motd,"r"); |
3591c066 | 571 | while (f && !feof(f)) { |
2e94e70e | 572 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
573 | if (len > 0) { |
574 | line[len] = 0; | |
68f40ebb | 575 | io_printf(f_out, "%s", line); |
3591c066 AT |
576 | } |
577 | } | |
2e94e70e WD |
578 | if (f) |
579 | fclose(f); | |
68f40ebb | 580 | io_printf(f_out, "\n"); |
3591c066 AT |
581 | } |
582 | ||
2e94e70e | 583 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 584 | return -1; |
91eee594 | 585 | |
daa598df | 586 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 587 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 588 | return -1; |
4a7144ee | 589 | } |
daa598df WD |
590 | if (protocol_version > remote_protocol) |
591 | protocol_version = remote_protocol; | |
91eee594 | 592 | |
c0422cea WD |
593 | line[0] = 0; |
594 | if (!read_line(f_in, line, sizeof line - 1)) | |
595 | return -1; | |
3591c066 | 596 | |
c0422cea WD |
597 | if (!*line || strcmp(line, "#list") == 0) { |
598 | send_listing(f_out); | |
599 | return -1; | |
600 | } | |
3591c066 | 601 | |
c0422cea WD |
602 | if (*line == '#') { |
603 | /* it's some sort of command that I don't understand */ | |
604 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
605 | return -1; | |
606 | } | |
3591c066 | 607 | |
c0422cea WD |
608 | if ((i = lp_number(line)) < 0) { |
609 | char *addr = client_addr(f_in); | |
610 | char *host = client_name(f_in); | |
611 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
612 | line, host, addr); | |
613 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
614 | return -1; | |
3591c066 AT |
615 | } |
616 | ||
68f40ebb | 617 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
618 | } |
619 | ||
620 | ||
621 | int daemon_main(void) | |
622 | { | |
8638dd48 | 623 | char *pid_file; |
1a016bfd | 624 | |
3591c066 | 625 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
626 | int i; |
627 | ||
628 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
629 | * stderr so that library functions (and getopt) don't |
630 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 631 | for (i = 1; i < 3; i++) { |
4a7144ee | 632 | close(i); |
41979ff8 AT |
633 | open("/dev/null", O_RDWR); |
634 | } | |
3eb38818 | 635 | |
68f40ebb | 636 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
637 | } |
638 | ||
13e29995 | 639 | if (!no_detach) |
4a7144ee | 640 | become_daemon(); |
3591c066 | 641 | |
2e94e70e | 642 | if (!lp_load(config_file, 1)) |
65417579 | 643 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 644 | |
0c56b1ad WD |
645 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
646 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 647 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 648 | bind_address = lp_bind_address(); |
0c56b1ad | 649 | |
45a83540 | 650 | log_init(); |
f9e940ef | 651 | |
9e5a5ddb | 652 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
653 | RSYNC_VERSION, rsync_port); |
654 | /* TODO: If listening on a particular address, then show that | |
655 | * address too. In fact, why not just do inet_ntop on the | |
656 | * local address??? */ | |
e42c9458 | 657 | |
8638dd48 | 658 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
659 | char pidbuf[16]; |
660 | int fd; | |
05b7bab8 | 661 | pid_t pid = getpid(); |
8638dd48 | 662 | cleanup_set_pid(pid); |
ad517ce5 DD |
663 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
664 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee | 665 | cleanup_set_pid(0); |
4875d6b6 WD |
666 | rsyserr(FLOG, errno, "failed to create pid file %s", |
667 | safe_fname(pid_file)); | |
4a7144ee | 668 | exit_cleanup(RERR_FILEIO); |
8638dd48 | 669 | } |
05b7bab8 | 670 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
671 | write(fd, pidbuf, strlen(pidbuf)); |
672 | close(fd); | |
8638dd48 DD |
673 | } |
674 | ||
8ef4ffd6 AT |
675 | start_accept_loop(rsync_port, start_daemon); |
676 | return -1; | |
3591c066 | 677 | } |