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 | 45 | extern int io_timeout; |
ad54dcc8 | 46 | extern int select_timeout; |
6e195fe9 WD |
47 | extern int orig_umask; |
48 | extern int no_detach; | |
49 | extern int default_af_hint; | |
50 | extern char *bind_address; | |
495723bb | 51 | extern struct exclude_list_struct server_exclude_list; |
837cbad9 | 52 | extern char *exclude_path_prefix; |
6e195fe9 | 53 | extern char *config_file; |
bf4679e8 | 54 | extern char *files_from; |
6e195fe9 WD |
55 | |
56 | char *auth_user; | |
3591c066 | 57 | |
be2961da | 58 | /** |
bc363ea9 | 59 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
60 | * function for remote-shell connections is do_cmd(). |
61 | * | |
fdf88d75 MP |
62 | * After negotiating which module to use and reading the server's |
63 | * motd, this hands over to client_run(). Telling the server the | |
64 | * module will cause it to chroot/setuid/etc. | |
65 | * | |
66 | * Instead of doing a transfer, the client may at this stage instead | |
67 | * get a listing of remote modules and exit. | |
be2961da MP |
68 | * |
69 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 70 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 71 | **/ |
3591c066 AT |
72 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
73 | { | |
68f40ebb | 74 | int fd, ret; |
2e94e70e | 75 | char *p, *user = NULL; |
4a7144ee | 76 | |
1732b6c0 WD |
77 | /* This is redundant with code in start_inband_exchange(), but this |
78 | * short-circuits a problem in the client before we open a socket, | |
79 | * and the extra check won't hurt. */ | |
f98df1d9 | 80 | if (*path == '/') { |
1732b6c0 WD |
81 | rprintf(FERROR, |
82 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
83 | return -1; |
84 | } | |
85 | ||
1732b6c0 | 86 | if ((p = strchr(host, '@')) != NULL) { |
bcb7e502 AT |
87 | user = host; |
88 | host = p+1; | |
1732b6c0 | 89 | *p = '\0'; |
bcb7e502 AT |
90 | } |
91 | ||
3add5835 WD |
92 | if (rsync_port == 0) |
93 | rsync_port = RSYNC_PORT; | |
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 | ||
102 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
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. */ | |
daa598df | 170 | kludge_around_eof = list_only && (protocol_version < 25); |
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. */ | |
198 | return RERR_STARTCLIENT; | |
199 | } else { | |
c613d370 | 200 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 201 | } |
3591c066 | 202 | } |
7a55d06e | 203 | kludge_around_eof = False; |
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", |
d62bcc17 WD |
259 | lp_lock_file(i)); |
260 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
261 | lp_lock_file(i)); | |
8d72ef6e | 262 | } else { |
1732b6c0 | 263 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 264 | lp_max_connections(i)); |
837cbad9 WD |
265 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
266 | lp_max_connections(i)); | |
8d72ef6e | 267 | } |
0c515f17 AT |
268 | return -1; |
269 | } | |
270 | ||
68f40ebb | 271 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 272 | |
97cb8dc2 | 273 | if (!auth_user) { |
1732b6c0 | 274 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
275 | name, host, addr); |
276 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 277 | return -1; |
d0d56395 AT |
278 | } |
279 | ||
3591c066 AT |
280 | module_id = i; |
281 | ||
6fe05820 | 282 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 283 | |
716baed7 DD |
284 | if (am_root) { |
285 | p = lp_uid(i); | |
286 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 287 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 288 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 289 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 290 | return -1; |
4a7144ee | 291 | } |
716baed7 DD |
292 | uid = atoi(p); |
293 | } | |
294 | ||
295 | p = lp_gid(i); | |
296 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 297 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 298 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 299 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 300 | return -1; |
4a7144ee | 301 | } |
716baed7 DD |
302 | gid = atoi(p); |
303 | } | |
8ef4ffd6 | 304 | } |
3b2b5345 | 305 | |
4a7144ee WD |
306 | /* TODO: If we're not root, but the configuration requests |
307 | * that we change to some uid other than the current one, then | |
308 | * log a warning. */ | |
309 | ||
310 | /* TODO: Perhaps take a list of gids, and make them into the | |
311 | * supplementary groups. */ | |
8ef4ffd6 | 312 | |
837cbad9 | 313 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
314 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
315 | exclude_path_prefix = ""; | |
837cbad9 | 316 | |
cd64343a | 317 | p = lp_include_from(i); |
357406ec WD |
318 | add_exclude_file(&server_exclude_list, p, |
319 | XFLG_FATAL_ERRORS | XFLG_DEF_INCLUDE); | |
cd64343a DD |
320 | |
321 | p = lp_include(i); | |
357406ec WD |
322 | add_exclude(&server_exclude_list, p, |
323 | XFLG_WORD_SPLIT | XFLG_DEF_INCLUDE); | |
cd64343a | 324 | |
8f3a2d54 | 325 | p = lp_exclude_from(i); |
357406ec WD |
326 | add_exclude_file(&server_exclude_list, p, |
327 | XFLG_FATAL_ERRORS); | |
8f3a2d54 | 328 | |
5805327b | 329 | p = lp_exclude(i); |
357406ec | 330 | add_exclude(&server_exclude_list, p, XFLG_WORD_SPLIT); |
837cbad9 WD |
331 | |
332 | exclude_path_prefix = NULL; | |
8f3a2d54 | 333 | |
45a83540 | 334 | log_init(); |
1a016bfd | 335 | |
8638dd48 | 336 | if (use_chroot) { |
b52c1d9d MP |
337 | /* |
338 | * XXX: The 'use chroot' flag is a fairly reliable | |
339 | * source of confusion, because it fails under two | |
340 | * important circumstances: running as non-root, | |
341 | * running on Win32 (or possibly others). On the | |
342 | * other hand, if you are running as root, then it | |
343 | * might be better to always use chroot. | |
344 | * | |
345 | * So, perhaps if we can't chroot we should just issue | |
346 | * a warning, unless a "require chroot" flag is set, | |
347 | * in which case we fail. | |
348 | */ | |
8638dd48 | 349 | if (chroot(lp_path(i))) { |
1732b6c0 | 350 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 351 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
352 | return -1; |
353 | } | |
3591c066 | 354 | |
59187666 | 355 | if (!push_dir("/")) { |
1732b6c0 | 356 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 357 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
358 | return -1; |
359 | } | |
3591c066 | 360 | |
716baed7 | 361 | } else { |
59187666 | 362 | if (!push_dir(lp_path(i))) { |
1732b6c0 | 363 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 364 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
365 | return -1; |
366 | } | |
cb13abfe | 367 | sanitize_paths = 1; |
716baed7 DD |
368 | } |
369 | ||
370 | if (am_root) { | |
715d1f45 MP |
371 | /* XXXX: You could argue that if the daemon is started |
372 | * by a non-root user and they explicitly specify a | |
373 | * gid, then we should try to change to that gid -- | |
374 | * this could be possible if it's already in their | |
375 | * supplementary groups. */ | |
376 | ||
377 | /* TODO: Perhaps we need to document that if rsyncd is | |
378 | * started by somebody other than root it will inherit | |
379 | * all their supplementary groups. */ | |
380 | ||
716baed7 | 381 | if (setgid(gid)) { |
1732b6c0 | 382 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 383 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
384 | return -1; |
385 | } | |
6969ebcf WD |
386 | #ifdef HAVE_SETGROUPS |
387 | /* Get rid of any supplementary groups this process | |
388 | * might have inheristed. */ | |
389 | if (setgroups(1, &gid)) { | |
1732b6c0 | 390 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
391 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
392 | return -1; | |
393 | } | |
394 | #endif | |
3591c066 | 395 | |
716baed7 | 396 | if (setuid(uid)) { |
1732b6c0 | 397 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 398 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
399 | return -1; |
400 | } | |
401 | ||
6fe05820 | 402 | am_root = (MY_UID() == 0); |
3591c066 AT |
403 | } |
404 | ||
68f40ebb | 405 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 406 | |
b7061c82 WD |
407 | maxargs = MAX_ARGS; |
408 | if (!(argv = new_array(char *, maxargs))) | |
409 | out_of_memory("rsync_module"); | |
3591c066 AT |
410 | argv[argc++] = "rsyncd"; |
411 | ||
412 | while (1) { | |
2e94e70e | 413 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 414 | return -1; |
3591c066 | 415 | |
2e94e70e WD |
416 | if (!*line) |
417 | break; | |
3591c066 | 418 | |
874895d5 AT |
419 | p = line; |
420 | ||
b7061c82 WD |
421 | if (argc == maxargs) { |
422 | maxargs += MAX_ARGS; | |
423 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
424 | out_of_memory("rsync_module"); | |
425 | } | |
2e94e70e | 426 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 427 | out_of_memory("rsync_module"); |
3591c066 | 428 | |
874895d5 | 429 | if (start_glob) { |
1a016bfd | 430 | if (start_glob == 1) { |
7b372642 | 431 | request = strdup(p); |
1a016bfd AT |
432 | start_glob++; |
433 | } | |
b7061c82 | 434 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 435 | } else |
874895d5 | 436 | argc++; |
874895d5 | 437 | |
2e94e70e | 438 | if (strcmp(line, ".") == 0) |
874895d5 | 439 | start_glob = 1; |
3591c066 AT |
440 | } |
441 | ||
4a7144ee | 442 | argp = argv; |
15b7b73d | 443 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 444 | |
7c2a9e76 WD |
445 | if (filesfrom_fd == 0) |
446 | filesfrom_fd = f_in; | |
447 | ||
7b372642 | 448 | if (request) { |
97cb8dc2 | 449 | if (*auth_user) { |
9e5a5ddb WD |
450 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
451 | am_sender ? "on" : "to", | |
97cb8dc2 | 452 | request, auth_user, host, addr); |
d0d56395 | 453 | } else { |
9e5a5ddb WD |
454 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
455 | am_sender ? "on" : "to", | |
d0d56395 AT |
456 | request, host, addr); |
457 | } | |
7b372642 AT |
458 | free(request); |
459 | } | |
460 | ||
15b7b73d | 461 | #ifndef DEBUG |
3591c066 | 462 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
463 | if (verbose > lp_max_verbosity()) |
464 | verbose = lp_max_verbosity(); | |
0199b05f | 465 | #endif |
3591c066 | 466 | |
1732b6c0 WD |
467 | if (protocol_version < 23 |
468 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 469 | io_start_multiplex_out(); |
1732b6c0 WD |
470 | else if (!ret) { |
471 | /* We have to get I/O multiplexing started so that we can | |
472 | * get the error back to the client. This means getting | |
473 | * the protocol setup finished first in later versions. */ | |
474 | setup_protocol(f_out, f_in); | |
bf4679e8 WD |
475 | if (files_from && !am_sender && strcmp(files_from, "-") != 0) |
476 | write_byte(f_out, 0); | |
da3478b2 | 477 | io_start_multiplex_out(); |
554e0a8d | 478 | } |
15b7b73d | 479 | |
41979ff8 | 480 | if (!ret) { |
4a7144ee | 481 | option_error(); |
7e561438 | 482 | msleep(400); |
4a7144ee | 483 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
484 | } |
485 | ||
ad54dcc8 | 486 | if (lp_timeout(i)) { |
81791cfc | 487 | io_timeout = lp_timeout(i); |
43bab403 | 488 | if (io_timeout < select_timeout) |
ad54dcc8 WD |
489 | select_timeout = io_timeout; |
490 | } | |
81791cfc | 491 | |
68f40ebb | 492 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
493 | |
494 | return 0; | |
495 | } | |
496 | ||
7a6421fa AT |
497 | /* send a list of available modules to the client. Don't list those |
498 | with "list = False". */ | |
3591c066 AT |
499 | static void send_listing(int fd) |
500 | { | |
501 | int n = lp_numservices(); | |
502 | int i; | |
063393d6 | 503 | |
c0422cea | 504 | for (i = 0; i < n; i++) { |
3591c066 | 505 | if (lp_list(i)) |
4a7144ee | 506 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 507 | } |
8f04bb36 | 508 | |
daa598df | 509 | if (protocol_version >= 25) |
063393d6 | 510 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
511 | } |
512 | ||
68f40ebb | 513 | /* this is called when a connection is established to a client |
3591c066 AT |
514 | and we want to start talking. The setup of the system is done from |
515 | here */ | |
68f40ebb | 516 | int start_daemon(int f_in, int f_out) |
3591c066 | 517 | { |
7a6421fa | 518 | char line[200]; |
3591c066 | 519 | char *motd; |
c0422cea | 520 | int i; |
4cdf25e4 | 521 | |
da3478b2 WD |
522 | io_set_sock_fds(f_in, f_out); |
523 | ||
2e94e70e | 524 | if (!lp_load(config_file, 0)) |
65417579 | 525 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 526 | |
30e8c8e1 DD |
527 | log_init(); |
528 | ||
68f40ebb WD |
529 | if (!am_server) { |
530 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
531 | set_socket_options(f_in, lp_socket_options()); | |
532 | set_nonblocking(f_in); | |
533 | } | |
3591c066 | 534 | |
5a8543b8 | 535 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
536 | |
537 | motd = lp_motd_file(); | |
27d3cdbc | 538 | if (motd && *motd) { |
0090cbdb | 539 | FILE *f = fopen(motd,"r"); |
3591c066 | 540 | while (f && !feof(f)) { |
2e94e70e | 541 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
542 | if (len > 0) { |
543 | line[len] = 0; | |
68f40ebb | 544 | io_printf(f_out, "%s", line); |
3591c066 AT |
545 | } |
546 | } | |
2e94e70e WD |
547 | if (f) |
548 | fclose(f); | |
68f40ebb | 549 | io_printf(f_out, "\n"); |
3591c066 AT |
550 | } |
551 | ||
2e94e70e | 552 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 553 | return -1; |
91eee594 | 554 | |
daa598df | 555 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 556 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 557 | return -1; |
4a7144ee | 558 | } |
daa598df WD |
559 | if (protocol_version > remote_protocol) |
560 | protocol_version = remote_protocol; | |
91eee594 | 561 | |
c0422cea WD |
562 | line[0] = 0; |
563 | if (!read_line(f_in, line, sizeof line - 1)) | |
564 | return -1; | |
3591c066 | 565 | |
c0422cea WD |
566 | if (!*line || strcmp(line, "#list") == 0) { |
567 | send_listing(f_out); | |
568 | return -1; | |
569 | } | |
3591c066 | 570 | |
c0422cea WD |
571 | if (*line == '#') { |
572 | /* it's some sort of command that I don't understand */ | |
573 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
574 | return -1; | |
575 | } | |
3591c066 | 576 | |
c0422cea WD |
577 | if ((i = lp_number(line)) < 0) { |
578 | char *addr = client_addr(f_in); | |
579 | char *host = client_name(f_in); | |
580 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
581 | line, host, addr); | |
582 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
583 | return -1; | |
3591c066 AT |
584 | } |
585 | ||
68f40ebb | 586 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
587 | } |
588 | ||
589 | ||
590 | int daemon_main(void) | |
591 | { | |
8638dd48 | 592 | char *pid_file; |
1a016bfd | 593 | |
3591c066 | 594 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
595 | int i; |
596 | ||
597 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
598 | * stderr so that library functions (and getopt) don't |
599 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 600 | for (i = 1; i < 3; i++) { |
4a7144ee | 601 | close(i); |
41979ff8 AT |
602 | open("/dev/null", O_RDWR); |
603 | } | |
3eb38818 | 604 | |
68f40ebb | 605 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
606 | } |
607 | ||
13e29995 | 608 | if (!no_detach) |
4a7144ee | 609 | become_daemon(); |
3591c066 | 610 | |
2e94e70e | 611 | if (!lp_load(config_file, 1)) |
65417579 | 612 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 613 | |
0c56b1ad WD |
614 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
615 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 616 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 617 | bind_address = lp_bind_address(); |
0c56b1ad | 618 | |
45a83540 | 619 | log_init(); |
f9e940ef | 620 | |
9e5a5ddb | 621 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
622 | RSYNC_VERSION, rsync_port); |
623 | /* TODO: If listening on a particular address, then show that | |
624 | * address too. In fact, why not just do inet_ntop on the | |
625 | * local address??? */ | |
e42c9458 | 626 | |
8638dd48 | 627 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
628 | char pidbuf[16]; |
629 | int fd; | |
05b7bab8 | 630 | pid_t pid = getpid(); |
8638dd48 | 631 | cleanup_set_pid(pid); |
ad517ce5 DD |
632 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
633 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
634 | cleanup_set_pid(0); |
635 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
636 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 637 | } |
05b7bab8 | 638 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
639 | write(fd, pidbuf, strlen(pidbuf)); |
640 | close(fd); | |
8638dd48 DD |
641 | } |
642 | ||
8ef4ffd6 AT |
643 | start_accept_loop(rsync_port, start_daemon); |
644 | return -1; | |
3591c066 | 645 | } |