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 verbose; |
35 | extern int rsync_port; | |
6e195fe9 WD |
36 | extern int kludge_around_eof; |
37 | extern int daemon_over_rsh; | |
38 | extern int list_only; | |
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 | 43 | extern int io_timeout; |
ad54dcc8 | 44 | extern int select_timeout; |
6e195fe9 WD |
45 | extern int orig_umask; |
46 | extern int no_detach; | |
47 | extern int default_af_hint; | |
48 | extern char *bind_address; | |
7842418b | 49 | extern struct filter_list_struct server_filter_list; |
6e195fe9 | 50 | extern char *config_file; |
bf4679e8 | 51 | extern char *files_from; |
6e195fe9 WD |
52 | |
53 | char *auth_user; | |
18638730 | 54 | int read_only = 0; |
211bc43b | 55 | int module_id = -1; |
3591c066 | 56 | |
e7bf7c01 WD |
57 | /* Length of lp_path() string when in daemon mode & not chrooted, else 0. */ |
58 | unsigned int module_dirlen = 0; | |
59 | ||
be2961da | 60 | /** |
bc363ea9 | 61 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
62 | * function for remote-shell connections is do_cmd(). |
63 | * | |
fdf88d75 MP |
64 | * After negotiating which module to use and reading the server's |
65 | * motd, this hands over to client_run(). Telling the server the | |
66 | * module will cause it to chroot/setuid/etc. | |
67 | * | |
68 | * Instead of doing a transfer, the client may at this stage instead | |
69 | * get a listing of remote modules and exit. | |
be2961da MP |
70 | * |
71 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 72 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 73 | **/ |
3591c066 AT |
74 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
75 | { | |
68f40ebb | 76 | int fd, ret; |
2e94e70e | 77 | char *p, *user = NULL; |
4a7144ee | 78 | |
1732b6c0 WD |
79 | /* This is redundant with code in start_inband_exchange(), but this |
80 | * short-circuits a problem in the client before we open a socket, | |
81 | * and the extra check won't hurt. */ | |
f98df1d9 | 82 | if (*path == '/') { |
1732b6c0 WD |
83 | rprintf(FERROR, |
84 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
85 | return -1; |
86 | } | |
87 | ||
1732b6c0 | 88 | if ((p = strchr(host, '@')) != NULL) { |
bcb7e502 AT |
89 | user = host; |
90 | host = p+1; | |
1732b6c0 | 91 | *p = '\0'; |
bcb7e502 AT |
92 | } |
93 | ||
3add5835 WD |
94 | if (rsync_port == 0) |
95 | rsync_port = RSYNC_PORT; | |
96 | ||
837cbad9 WD |
97 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
98 | default_af_hint); | |
df5cd107 | 99 | if (fd == -1) |
65417579 | 100 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
101 | |
102 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
103 | ||
104 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
105 | } | |
106 | ||
b9f592fb WD |
107 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
108 | int argc) | |
68f40ebb WD |
109 | { |
110 | int i; | |
111 | char *sargs[MAX_ARGS]; | |
112 | int sargc = 0; | |
113 | char line[MAXPATHLEN]; | |
114 | char *p; | |
68f40ebb WD |
115 | |
116 | if (argc == 0 && !am_sender) | |
9bcb2595 | 117 | list_only |= 1; |
68f40ebb WD |
118 | |
119 | if (*path == '/') { | |
1732b6c0 WD |
120 | rprintf(FERROR, |
121 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
122 | return -1; |
123 | } | |
124 | ||
2e94e70e WD |
125 | if (!user) |
126 | user = getenv("USER"); | |
127 | if (!user) | |
128 | user = getenv("LOGNAME"); | |
68f40ebb | 129 | |
5a8543b8 | 130 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 131 | |
2e94e70e | 132 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 133 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
134 | return -1; |
135 | } | |
136 | ||
daa598df | 137 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
138 | /* note that read_line strips of \n or \r */ |
139 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
140 | line); | |
3591c066 AT |
141 | return -1; |
142 | } | |
daa598df WD |
143 | if (protocol_version > remote_protocol) |
144 | protocol_version = remote_protocol; | |
3591c066 | 145 | |
9bcb2595 WD |
146 | if (list_only && protocol_version >= 29) |
147 | list_only |= 2; | |
148 | ||
149 | /* set daemon_over_rsh to false since we need to build the | |
150 | * true set of args passed through the rsh/ssh connection; | |
151 | * this is a no-op for direct-socket-connection mode */ | |
152 | daemon_over_rsh = 0; | |
153 | server_options(sargs, &sargc); | |
154 | ||
155 | sargs[sargc++] = "."; | |
156 | ||
157 | if (path && *path) | |
158 | sargs[sargc++] = path; | |
159 | ||
160 | sargs[sargc] = NULL; | |
161 | ||
162 | if (verbose > 1) | |
163 | print_child_argv(sargs); | |
164 | ||
2c91d3d3 AT |
165 | p = strchr(path,'/'); |
166 | if (p) *p = 0; | |
68f40ebb | 167 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
168 | if (p) *p = '/'; |
169 | ||
063393d6 MP |
170 | /* Old servers may just drop the connection here, |
171 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 172 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 173 | |
063393d6 | 174 | while (1) { |
2e94e70e | 175 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 176 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
177 | return -1; |
178 | } | |
31593dd6 | 179 | |
31593dd6 | 180 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 181 | auth_client(f_out, user, line+18); |
31593dd6 AT |
182 | continue; |
183 | } | |
31593dd6 | 184 | |
2e94e70e WD |
185 | if (strcmp(line,"@RSYNCD: OK") == 0) |
186 | break; | |
8f04bb36 | 187 | |
cae95647 MP |
188 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
189 | /* This is sent by recent versions of the | |
190 | * server to terminate the listing of modules. | |
191 | * We don't want to go on and transfer | |
192 | * anything; just exit. */ | |
193 | exit(0); | |
194 | } | |
8f04bb36 | 195 | |
136ac7ec | 196 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 197 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
198 | /* This is always fatal; the server will now |
199 | * close the socket. */ | |
200 | return RERR_STARTCLIENT; | |
201 | } else { | |
c613d370 | 202 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 203 | } |
3591c066 | 204 | } |
7a55d06e | 205 | kludge_around_eof = False; |
3591c066 | 206 | |
68f40ebb WD |
207 | for (i = 0; i < sargc; i++) { |
208 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 209 | } |
68f40ebb | 210 | io_printf(f_out, "\n"); |
3591c066 | 211 | |
daa598df | 212 | if (protocol_version < 23) { |
3f55bd5d | 213 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 214 | io_start_multiplex_in(); |
09b7f5db | 215 | } |
8d9dc9f9 | 216 | |
68f40ebb | 217 | return 0; |
3591c066 AT |
218 | } |
219 | ||
220 | ||
221 | ||
68f40ebb | 222 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 223 | { |
2e94e70e | 224 | int argc = 0; |
b7061c82 WD |
225 | int maxargs; |
226 | char **argv; | |
3591c066 | 227 | char **argp; |
e42c9458 | 228 | char line[MAXPATHLEN]; |
2af27ad9 | 229 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 230 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 231 | char *p; |
09021eab DD |
232 | char *addr = client_addr(f_in); |
233 | char *host = client_name(f_in); | |
874895d5 | 234 | char *name = lp_name(i); |
8638dd48 | 235 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 236 | int start_glob = 0; |
41979ff8 | 237 | int ret; |
2e94e70e | 238 | char *request = NULL; |
56c473b7 AT |
239 | |
240 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 241 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 242 | name, host, addr); |
c0422cea WD |
243 | if (!lp_list(i)) |
244 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
245 | else { | |
246 | io_printf(f_out, | |
247 | "@ERROR: access denied to %s from %s (%s)\n", | |
248 | name, host, addr); | |
249 | } | |
56c473b7 AT |
250 | return -1; |
251 | } | |
3591c066 | 252 | |
68f40ebb | 253 | if (am_daemon && am_server) { |
9e5a5ddb | 254 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
255 | name, host, addr); |
256 | } | |
257 | ||
5e71c444 | 258 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 259 | if (errno) { |
1732b6c0 | 260 | rsyserr(FLOG, errno, "failed to open lock file %s", |
4875d6b6 WD |
261 | safe_fname(lp_lock_file(i))); |
262 | io_printf(f_out, "@ERROR: failed to open lock file\n"); | |
8d72ef6e | 263 | } else { |
1732b6c0 | 264 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 265 | lp_max_connections(i)); |
4ccfd96c | 266 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 267 | lp_max_connections(i)); |
8d72ef6e | 268 | } |
0c515f17 AT |
269 | return -1; |
270 | } | |
271 | ||
68f40ebb | 272 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 273 | |
97cb8dc2 | 274 | if (!auth_user) { |
1732b6c0 | 275 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
276 | name, host, addr); |
277 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 278 | return -1; |
d0d56395 AT |
279 | } |
280 | ||
3591c066 AT |
281 | module_id = i; |
282 | ||
211bc43b | 283 | if (lp_read_only(i)) |
18638730 WD |
284 | read_only = 1; |
285 | ||
6fe05820 | 286 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 287 | |
716baed7 DD |
288 | if (am_root) { |
289 | p = lp_uid(i); | |
290 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 291 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 292 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 293 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 294 | return -1; |
4a7144ee | 295 | } |
716baed7 DD |
296 | uid = atoi(p); |
297 | } | |
298 | ||
299 | p = lp_gid(i); | |
300 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 301 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 302 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 303 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 304 | return -1; |
4a7144ee | 305 | } |
716baed7 DD |
306 | gid = atoi(p); |
307 | } | |
8ef4ffd6 | 308 | } |
3b2b5345 | 309 | |
4a7144ee WD |
310 | /* TODO: If we're not root, but the configuration requests |
311 | * that we change to some uid other than the current one, then | |
312 | * log a warning. */ | |
313 | ||
314 | /* TODO: Perhaps take a list of gids, and make them into the | |
315 | * supplementary groups. */ | |
8ef4ffd6 | 316 | |
e7bf7c01 WD |
317 | if (use_chroot) { |
318 | module_dirlen = 0; | |
7842418b | 319 | set_filter_dir("/", 1); |
e7bf7c01 WD |
320 | } else { |
321 | module_dirlen = strlen(lp_path(i)); | |
7842418b | 322 | set_filter_dir(lp_path(i), module_dirlen); |
e7bf7c01 WD |
323 | } |
324 | ||
325 | p = lp_filter(i); | |
ebfd1a1c | 326 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
0a68f869 | 327 | XFLG_ANCHORED2ABS); |
837cbad9 | 328 | |
cd64343a | 329 | p = lp_include_from(i); |
ebfd1a1c | 330 | parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE, |
0a68f869 | 331 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
332 | |
333 | p = lp_include(i); | |
ebfd1a1c | 334 | parse_rule(&server_filter_list, p, |
0a68f869 WD |
335 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
336 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES); | |
cd64343a | 337 | |
8f3a2d54 | 338 | p = lp_exclude_from(i); |
ebfd1a1c | 339 | parse_filter_file(&server_filter_list, p, 0, |
0a68f869 | 340 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 341 | |
5805327b | 342 | p = lp_exclude(i); |
ebfd1a1c | 343 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
0a68f869 | 344 | XFLG_ANCHORED2ABS | XFLG_OLD_PREFIXES); |
8f3a2d54 | 345 | |
45a83540 | 346 | log_init(); |
1a016bfd | 347 | |
8638dd48 | 348 | if (use_chroot) { |
b52c1d9d MP |
349 | /* |
350 | * XXX: The 'use chroot' flag is a fairly reliable | |
351 | * source of confusion, because it fails under two | |
352 | * important circumstances: running as non-root, | |
353 | * running on Win32 (or possibly others). On the | |
354 | * other hand, if you are running as root, then it | |
355 | * might be better to always use chroot. | |
356 | * | |
357 | * So, perhaps if we can't chroot we should just issue | |
358 | * a warning, unless a "require chroot" flag is set, | |
359 | * in which case we fail. | |
360 | */ | |
8638dd48 | 361 | if (chroot(lp_path(i))) { |
4875d6b6 WD |
362 | rsyserr(FLOG, errno, "chroot %s failed", |
363 | safe_fname(lp_path(i))); | |
68f40ebb | 364 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
365 | return -1; |
366 | } | |
3591c066 | 367 | |
59187666 | 368 | if (!push_dir("/")) { |
4875d6b6 WD |
369 | rsyserr(FLOG, errno, "chdir %s failed\n", |
370 | safe_fname(lp_path(i))); | |
68f40ebb | 371 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
372 | return -1; |
373 | } | |
3591c066 | 374 | |
716baed7 | 375 | } else { |
59187666 | 376 | if (!push_dir(lp_path(i))) { |
4875d6b6 WD |
377 | rsyserr(FLOG, errno, "chdir %s failed\n", |
378 | safe_fname(lp_path(i))); | |
68f40ebb | 379 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
380 | return -1; |
381 | } | |
cb13abfe | 382 | sanitize_paths = 1; |
716baed7 DD |
383 | } |
384 | ||
385 | if (am_root) { | |
715d1f45 MP |
386 | /* XXXX: You could argue that if the daemon is started |
387 | * by a non-root user and they explicitly specify a | |
388 | * gid, then we should try to change to that gid -- | |
389 | * this could be possible if it's already in their | |
390 | * supplementary groups. */ | |
391 | ||
392 | /* TODO: Perhaps we need to document that if rsyncd is | |
393 | * started by somebody other than root it will inherit | |
394 | * all their supplementary groups. */ | |
395 | ||
716baed7 | 396 | if (setgid(gid)) { |
1732b6c0 | 397 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 398 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
399 | return -1; |
400 | } | |
4f5b0756 | 401 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
402 | /* Get rid of any supplementary groups this process |
403 | * might have inheristed. */ | |
404 | if (setgroups(1, &gid)) { | |
1732b6c0 | 405 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
406 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
407 | return -1; | |
408 | } | |
409 | #endif | |
3591c066 | 410 | |
716baed7 | 411 | if (setuid(uid)) { |
1732b6c0 | 412 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 413 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
414 | return -1; |
415 | } | |
416 | ||
6fe05820 | 417 | am_root = (MY_UID() == 0); |
3591c066 AT |
418 | } |
419 | ||
68f40ebb | 420 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 421 | |
b7061c82 WD |
422 | maxargs = MAX_ARGS; |
423 | if (!(argv = new_array(char *, maxargs))) | |
424 | out_of_memory("rsync_module"); | |
3591c066 AT |
425 | argv[argc++] = "rsyncd"; |
426 | ||
427 | while (1) { | |
2e94e70e | 428 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 429 | return -1; |
3591c066 | 430 | |
2e94e70e WD |
431 | if (!*line) |
432 | break; | |
3591c066 | 433 | |
874895d5 AT |
434 | p = line; |
435 | ||
b7061c82 WD |
436 | if (argc == maxargs) { |
437 | maxargs += MAX_ARGS; | |
438 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
439 | out_of_memory("rsync_module"); | |
440 | } | |
2e94e70e | 441 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 442 | out_of_memory("rsync_module"); |
3591c066 | 443 | |
874895d5 | 444 | if (start_glob) { |
1a016bfd | 445 | if (start_glob == 1) { |
7b372642 | 446 | request = strdup(p); |
1a016bfd AT |
447 | start_glob++; |
448 | } | |
b7061c82 | 449 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 450 | } else |
874895d5 | 451 | argc++; |
874895d5 | 452 | |
2e94e70e | 453 | if (strcmp(line, ".") == 0) |
874895d5 | 454 | start_glob = 1; |
3591c066 AT |
455 | } |
456 | ||
18638730 | 457 | verbose = 0; /* future verbosity is controlled by client options */ |
4a7144ee | 458 | argp = argv; |
15b7b73d | 459 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 460 | |
7c2a9e76 WD |
461 | if (filesfrom_fd == 0) |
462 | filesfrom_fd = f_in; | |
463 | ||
7b372642 | 464 | if (request) { |
97cb8dc2 | 465 | if (*auth_user) { |
9e5a5ddb WD |
466 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
467 | am_sender ? "on" : "to", | |
97cb8dc2 | 468 | request, auth_user, host, addr); |
d0d56395 | 469 | } else { |
9e5a5ddb WD |
470 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
471 | am_sender ? "on" : "to", | |
d0d56395 AT |
472 | request, host, addr); |
473 | } | |
7b372642 AT |
474 | free(request); |
475 | } | |
476 | ||
15b7b73d | 477 | #ifndef DEBUG |
3591c066 | 478 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
479 | if (verbose > lp_max_verbosity()) |
480 | verbose = lp_max_verbosity(); | |
0199b05f | 481 | #endif |
3591c066 | 482 | |
1732b6c0 WD |
483 | if (protocol_version < 23 |
484 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 485 | io_start_multiplex_out(); |
1732b6c0 WD |
486 | else if (!ret) { |
487 | /* We have to get I/O multiplexing started so that we can | |
488 | * get the error back to the client. This means getting | |
489 | * the protocol setup finished first in later versions. */ | |
490 | setup_protocol(f_out, f_in); | |
bf4679e8 WD |
491 | if (files_from && !am_sender && strcmp(files_from, "-") != 0) |
492 | write_byte(f_out, 0); | |
da3478b2 | 493 | io_start_multiplex_out(); |
554e0a8d | 494 | } |
15b7b73d | 495 | |
41979ff8 | 496 | if (!ret) { |
4a7144ee | 497 | option_error(); |
7e561438 | 498 | msleep(400); |
4a7144ee | 499 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
500 | } |
501 | ||
ad54dcc8 | 502 | if (lp_timeout(i)) { |
81791cfc | 503 | io_timeout = lp_timeout(i); |
43bab403 | 504 | if (io_timeout < select_timeout) |
ad54dcc8 WD |
505 | select_timeout = io_timeout; |
506 | } | |
81791cfc | 507 | |
68f40ebb | 508 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
509 | |
510 | return 0; | |
511 | } | |
512 | ||
7a6421fa AT |
513 | /* send a list of available modules to the client. Don't list those |
514 | with "list = False". */ | |
3591c066 AT |
515 | static void send_listing(int fd) |
516 | { | |
517 | int n = lp_numservices(); | |
518 | int i; | |
063393d6 | 519 | |
c0422cea | 520 | for (i = 0; i < n; i++) { |
3591c066 | 521 | if (lp_list(i)) |
4a7144ee | 522 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 523 | } |
8f04bb36 | 524 | |
daa598df | 525 | if (protocol_version >= 25) |
063393d6 | 526 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
527 | } |
528 | ||
68f40ebb | 529 | /* this is called when a connection is established to a client |
3591c066 AT |
530 | and we want to start talking. The setup of the system is done from |
531 | here */ | |
68f40ebb | 532 | int start_daemon(int f_in, int f_out) |
3591c066 | 533 | { |
7a6421fa | 534 | char line[200]; |
3591c066 | 535 | char *motd; |
c0422cea | 536 | int i; |
4cdf25e4 | 537 | |
da3478b2 WD |
538 | io_set_sock_fds(f_in, f_out); |
539 | ||
2e94e70e | 540 | if (!lp_load(config_file, 0)) |
65417579 | 541 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 542 | |
30e8c8e1 DD |
543 | log_init(); |
544 | ||
68f40ebb WD |
545 | if (!am_server) { |
546 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
547 | set_socket_options(f_in, lp_socket_options()); | |
548 | set_nonblocking(f_in); | |
549 | } | |
3591c066 | 550 | |
5a8543b8 | 551 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
552 | |
553 | motd = lp_motd_file(); | |
27d3cdbc | 554 | if (motd && *motd) { |
0090cbdb | 555 | FILE *f = fopen(motd,"r"); |
3591c066 | 556 | while (f && !feof(f)) { |
2e94e70e | 557 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
558 | if (len > 0) { |
559 | line[len] = 0; | |
68f40ebb | 560 | io_printf(f_out, "%s", line); |
3591c066 AT |
561 | } |
562 | } | |
2e94e70e WD |
563 | if (f) |
564 | fclose(f); | |
68f40ebb | 565 | io_printf(f_out, "\n"); |
3591c066 AT |
566 | } |
567 | ||
2e94e70e | 568 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 569 | return -1; |
91eee594 | 570 | |
daa598df | 571 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 572 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 573 | return -1; |
4a7144ee | 574 | } |
daa598df WD |
575 | if (protocol_version > remote_protocol) |
576 | protocol_version = remote_protocol; | |
91eee594 | 577 | |
c0422cea WD |
578 | line[0] = 0; |
579 | if (!read_line(f_in, line, sizeof line - 1)) | |
580 | return -1; | |
3591c066 | 581 | |
c0422cea WD |
582 | if (!*line || strcmp(line, "#list") == 0) { |
583 | send_listing(f_out); | |
584 | return -1; | |
585 | } | |
3591c066 | 586 | |
c0422cea WD |
587 | if (*line == '#') { |
588 | /* it's some sort of command that I don't understand */ | |
589 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
590 | return -1; | |
591 | } | |
3591c066 | 592 | |
c0422cea WD |
593 | if ((i = lp_number(line)) < 0) { |
594 | char *addr = client_addr(f_in); | |
595 | char *host = client_name(f_in); | |
596 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
597 | line, host, addr); | |
598 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
599 | return -1; | |
3591c066 AT |
600 | } |
601 | ||
68f40ebb | 602 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
603 | } |
604 | ||
605 | ||
606 | int daemon_main(void) | |
607 | { | |
8638dd48 | 608 | char *pid_file; |
1a016bfd | 609 | |
3591c066 | 610 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
611 | int i; |
612 | ||
613 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
614 | * stderr so that library functions (and getopt) don't |
615 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 616 | for (i = 1; i < 3; i++) { |
4a7144ee | 617 | close(i); |
41979ff8 AT |
618 | open("/dev/null", O_RDWR); |
619 | } | |
3eb38818 | 620 | |
68f40ebb | 621 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
622 | } |
623 | ||
13e29995 | 624 | if (!no_detach) |
4a7144ee | 625 | become_daemon(); |
3591c066 | 626 | |
2e94e70e | 627 | if (!lp_load(config_file, 1)) |
65417579 | 628 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 629 | |
0c56b1ad WD |
630 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
631 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 632 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 633 | bind_address = lp_bind_address(); |
0c56b1ad | 634 | |
45a83540 | 635 | log_init(); |
f9e940ef | 636 | |
9e5a5ddb | 637 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
638 | RSYNC_VERSION, rsync_port); |
639 | /* TODO: If listening on a particular address, then show that | |
640 | * address too. In fact, why not just do inet_ntop on the | |
641 | * local address??? */ | |
e42c9458 | 642 | |
8638dd48 | 643 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
644 | char pidbuf[16]; |
645 | int fd; | |
05b7bab8 | 646 | pid_t pid = getpid(); |
8638dd48 | 647 | cleanup_set_pid(pid); |
ad517ce5 DD |
648 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
649 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee | 650 | cleanup_set_pid(0); |
4875d6b6 WD |
651 | rsyserr(FLOG, errno, "failed to create pid file %s", |
652 | safe_fname(pid_file)); | |
4a7144ee | 653 | exit_cleanup(RERR_FILEIO); |
8638dd48 | 654 | } |
05b7bab8 | 655 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
656 | write(fd, pidbuf, strlen(pidbuf)); |
657 | close(fd); | |
8638dd48 DD |
658 | } |
659 | ||
8ef4ffd6 AT |
660 | start_accept_loop(rsync_port, start_daemon); |
661 | return -1; | |
3591c066 | 662 | } |