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) | |
115 | list_only = 1; | |
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 | |
4a7144ee WD |
128 | /* set daemon_over_rsh to false since we need to build the |
129 | * true set of args passed through the rsh/ssh connection; | |
130 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
131 | daemon_over_rsh = 0; |
132 | server_options(sargs, &sargc); | |
3591c066 AT |
133 | |
134 | sargs[sargc++] = "."; | |
135 | ||
4a7144ee | 136 | if (path && *path) |
3591c066 AT |
137 | sargs[sargc++] = path; |
138 | ||
139 | sargs[sargc] = NULL; | |
140 | ||
5a8543b8 | 141 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 142 | |
2e94e70e | 143 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 144 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
145 | return -1; |
146 | } | |
147 | ||
daa598df | 148 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
149 | /* note that read_line strips of \n or \r */ |
150 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
151 | line); | |
3591c066 AT |
152 | return -1; |
153 | } | |
daa598df WD |
154 | if (protocol_version > remote_protocol) |
155 | protocol_version = remote_protocol; | |
3591c066 | 156 | |
2c91d3d3 AT |
157 | p = strchr(path,'/'); |
158 | if (p) *p = 0; | |
68f40ebb | 159 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
160 | if (p) *p = '/'; |
161 | ||
063393d6 MP |
162 | /* Old servers may just drop the connection here, |
163 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 164 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 165 | |
063393d6 | 166 | while (1) { |
2e94e70e | 167 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 168 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
169 | return -1; |
170 | } | |
31593dd6 | 171 | |
31593dd6 | 172 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 173 | auth_client(f_out, user, line+18); |
31593dd6 AT |
174 | continue; |
175 | } | |
31593dd6 | 176 | |
2e94e70e WD |
177 | if (strcmp(line,"@RSYNCD: OK") == 0) |
178 | break; | |
8f04bb36 | 179 | |
cae95647 MP |
180 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
181 | /* This is sent by recent versions of the | |
182 | * server to terminate the listing of modules. | |
183 | * We don't want to go on and transfer | |
184 | * anything; just exit. */ | |
185 | exit(0); | |
186 | } | |
8f04bb36 | 187 | |
136ac7ec | 188 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 189 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
190 | /* This is always fatal; the server will now |
191 | * close the socket. */ | |
192 | return RERR_STARTCLIENT; | |
193 | } else { | |
c613d370 | 194 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 195 | } |
3591c066 | 196 | } |
7a55d06e | 197 | kludge_around_eof = False; |
3591c066 | 198 | |
68f40ebb WD |
199 | for (i = 0; i < sargc; i++) { |
200 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 201 | } |
68f40ebb | 202 | io_printf(f_out, "\n"); |
3591c066 | 203 | |
daa598df | 204 | if (protocol_version < 23) { |
3f55bd5d | 205 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 206 | io_start_multiplex_in(); |
09b7f5db | 207 | } |
8d9dc9f9 | 208 | |
68f40ebb | 209 | return 0; |
3591c066 AT |
210 | } |
211 | ||
212 | ||
213 | ||
68f40ebb | 214 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 215 | { |
2e94e70e | 216 | int argc = 0; |
b7061c82 WD |
217 | int maxargs; |
218 | char **argv; | |
3591c066 | 219 | char **argp; |
e42c9458 | 220 | char line[MAXPATHLEN]; |
2af27ad9 | 221 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 222 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 223 | char *p; |
09021eab DD |
224 | char *addr = client_addr(f_in); |
225 | char *host = client_name(f_in); | |
874895d5 | 226 | char *name = lp_name(i); |
8638dd48 | 227 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 228 | int start_glob = 0; |
41979ff8 | 229 | int ret; |
2e94e70e | 230 | char *request = NULL; |
56c473b7 AT |
231 | |
232 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 233 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 234 | name, host, addr); |
c0422cea WD |
235 | if (!lp_list(i)) |
236 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
237 | else { | |
238 | io_printf(f_out, | |
239 | "@ERROR: access denied to %s from %s (%s)\n", | |
240 | name, host, addr); | |
241 | } | |
56c473b7 AT |
242 | return -1; |
243 | } | |
3591c066 | 244 | |
68f40ebb | 245 | if (am_daemon && am_server) { |
9e5a5ddb | 246 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
247 | name, host, addr); |
248 | } | |
249 | ||
5e71c444 | 250 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 251 | if (errno) { |
1732b6c0 | 252 | rsyserr(FLOG, errno, "failed to open lock file %s", |
d62bcc17 WD |
253 | lp_lock_file(i)); |
254 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
255 | lp_lock_file(i)); | |
8d72ef6e | 256 | } else { |
1732b6c0 | 257 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 258 | lp_max_connections(i)); |
837cbad9 WD |
259 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
260 | lp_max_connections(i)); | |
8d72ef6e | 261 | } |
0c515f17 AT |
262 | return -1; |
263 | } | |
264 | ||
68f40ebb | 265 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 266 | |
97cb8dc2 | 267 | if (!auth_user) { |
1732b6c0 | 268 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
269 | name, host, addr); |
270 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 271 | return -1; |
d0d56395 AT |
272 | } |
273 | ||
3591c066 AT |
274 | module_id = i; |
275 | ||
6fe05820 | 276 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 277 | |
716baed7 DD |
278 | if (am_root) { |
279 | p = lp_uid(i); | |
280 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 281 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 282 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 283 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 284 | return -1; |
4a7144ee | 285 | } |
716baed7 DD |
286 | uid = atoi(p); |
287 | } | |
288 | ||
289 | p = lp_gid(i); | |
290 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 291 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 292 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 293 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 294 | return -1; |
4a7144ee | 295 | } |
716baed7 DD |
296 | gid = atoi(p); |
297 | } | |
8ef4ffd6 | 298 | } |
3b2b5345 | 299 | |
4a7144ee WD |
300 | /* TODO: If we're not root, but the configuration requests |
301 | * that we change to some uid other than the current one, then | |
302 | * log a warning. */ | |
303 | ||
304 | /* TODO: Perhaps take a list of gids, and make them into the | |
305 | * supplementary groups. */ | |
8ef4ffd6 | 306 | |
837cbad9 | 307 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
308 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
309 | exclude_path_prefix = ""; | |
837cbad9 | 310 | |
cd64343a | 311 | p = lp_include_from(i); |
357406ec WD |
312 | add_exclude_file(&server_exclude_list, p, |
313 | XFLG_FATAL_ERRORS | XFLG_DEF_INCLUDE); | |
cd64343a DD |
314 | |
315 | p = lp_include(i); | |
357406ec WD |
316 | add_exclude(&server_exclude_list, p, |
317 | XFLG_WORD_SPLIT | XFLG_DEF_INCLUDE); | |
cd64343a | 318 | |
8f3a2d54 | 319 | p = lp_exclude_from(i); |
357406ec WD |
320 | add_exclude_file(&server_exclude_list, p, |
321 | XFLG_FATAL_ERRORS); | |
8f3a2d54 | 322 | |
5805327b | 323 | p = lp_exclude(i); |
357406ec | 324 | add_exclude(&server_exclude_list, p, XFLG_WORD_SPLIT); |
837cbad9 WD |
325 | |
326 | exclude_path_prefix = NULL; | |
8f3a2d54 | 327 | |
45a83540 | 328 | log_init(); |
1a016bfd | 329 | |
8638dd48 | 330 | if (use_chroot) { |
b52c1d9d MP |
331 | /* |
332 | * XXX: The 'use chroot' flag is a fairly reliable | |
333 | * source of confusion, because it fails under two | |
334 | * important circumstances: running as non-root, | |
335 | * running on Win32 (or possibly others). On the | |
336 | * other hand, if you are running as root, then it | |
337 | * might be better to always use chroot. | |
338 | * | |
339 | * So, perhaps if we can't chroot we should just issue | |
340 | * a warning, unless a "require chroot" flag is set, | |
341 | * in which case we fail. | |
342 | */ | |
8638dd48 | 343 | if (chroot(lp_path(i))) { |
1732b6c0 | 344 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 345 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
346 | return -1; |
347 | } | |
3591c066 | 348 | |
59187666 | 349 | if (!push_dir("/")) { |
1732b6c0 | 350 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 351 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
352 | return -1; |
353 | } | |
3591c066 | 354 | |
716baed7 | 355 | } else { |
59187666 | 356 | if (!push_dir(lp_path(i))) { |
1732b6c0 | 357 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 358 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
359 | return -1; |
360 | } | |
cb13abfe | 361 | sanitize_paths = 1; |
716baed7 DD |
362 | } |
363 | ||
364 | if (am_root) { | |
715d1f45 MP |
365 | /* XXXX: You could argue that if the daemon is started |
366 | * by a non-root user and they explicitly specify a | |
367 | * gid, then we should try to change to that gid -- | |
368 | * this could be possible if it's already in their | |
369 | * supplementary groups. */ | |
370 | ||
371 | /* TODO: Perhaps we need to document that if rsyncd is | |
372 | * started by somebody other than root it will inherit | |
373 | * all their supplementary groups. */ | |
374 | ||
716baed7 | 375 | if (setgid(gid)) { |
1732b6c0 | 376 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 377 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
378 | return -1; |
379 | } | |
6969ebcf WD |
380 | #ifdef HAVE_SETGROUPS |
381 | /* Get rid of any supplementary groups this process | |
382 | * might have inheristed. */ | |
383 | if (setgroups(1, &gid)) { | |
1732b6c0 | 384 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
385 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
386 | return -1; | |
387 | } | |
388 | #endif | |
3591c066 | 389 | |
716baed7 | 390 | if (setuid(uid)) { |
1732b6c0 | 391 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 392 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
393 | return -1; |
394 | } | |
395 | ||
6fe05820 | 396 | am_root = (MY_UID() == 0); |
3591c066 AT |
397 | } |
398 | ||
68f40ebb | 399 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 400 | |
b7061c82 WD |
401 | maxargs = MAX_ARGS; |
402 | if (!(argv = new_array(char *, maxargs))) | |
403 | out_of_memory("rsync_module"); | |
3591c066 AT |
404 | argv[argc++] = "rsyncd"; |
405 | ||
406 | while (1) { | |
2e94e70e | 407 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 408 | return -1; |
3591c066 | 409 | |
2e94e70e WD |
410 | if (!*line) |
411 | break; | |
3591c066 | 412 | |
874895d5 AT |
413 | p = line; |
414 | ||
b7061c82 WD |
415 | if (argc == maxargs) { |
416 | maxargs += MAX_ARGS; | |
417 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
418 | out_of_memory("rsync_module"); | |
419 | } | |
2e94e70e | 420 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 421 | out_of_memory("rsync_module"); |
3591c066 | 422 | |
874895d5 | 423 | if (start_glob) { |
1a016bfd | 424 | if (start_glob == 1) { |
7b372642 | 425 | request = strdup(p); |
1a016bfd AT |
426 | start_glob++; |
427 | } | |
b7061c82 | 428 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 429 | } else |
874895d5 | 430 | argc++; |
874895d5 | 431 | |
2e94e70e | 432 | if (strcmp(line, ".") == 0) |
874895d5 | 433 | start_glob = 1; |
3591c066 AT |
434 | } |
435 | ||
4a7144ee | 436 | argp = argv; |
15b7b73d | 437 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 438 | |
7c2a9e76 WD |
439 | if (filesfrom_fd == 0) |
440 | filesfrom_fd = f_in; | |
441 | ||
7b372642 | 442 | if (request) { |
97cb8dc2 | 443 | if (*auth_user) { |
9e5a5ddb WD |
444 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
445 | am_sender ? "on" : "to", | |
97cb8dc2 | 446 | request, auth_user, host, addr); |
d0d56395 | 447 | } else { |
9e5a5ddb WD |
448 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
449 | am_sender ? "on" : "to", | |
d0d56395 AT |
450 | request, host, addr); |
451 | } | |
7b372642 AT |
452 | free(request); |
453 | } | |
454 | ||
15b7b73d | 455 | #ifndef DEBUG |
3591c066 | 456 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
457 | if (verbose > lp_max_verbosity()) |
458 | verbose = lp_max_verbosity(); | |
0199b05f | 459 | #endif |
3591c066 | 460 | |
1732b6c0 WD |
461 | if (protocol_version < 23 |
462 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 463 | io_start_multiplex_out(); |
1732b6c0 WD |
464 | else if (!ret) { |
465 | /* We have to get I/O multiplexing started so that we can | |
466 | * get the error back to the client. This means getting | |
467 | * the protocol setup finished first in later versions. */ | |
468 | setup_protocol(f_out, f_in); | |
bf4679e8 WD |
469 | if (files_from && !am_sender && strcmp(files_from, "-") != 0) |
470 | write_byte(f_out, 0); | |
da3478b2 | 471 | io_start_multiplex_out(); |
554e0a8d | 472 | } |
15b7b73d | 473 | |
41979ff8 | 474 | if (!ret) { |
4a7144ee | 475 | option_error(); |
7e561438 | 476 | msleep(400); |
4a7144ee | 477 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
478 | } |
479 | ||
ad54dcc8 | 480 | if (lp_timeout(i)) { |
81791cfc | 481 | io_timeout = lp_timeout(i); |
43bab403 | 482 | if (io_timeout < select_timeout) |
ad54dcc8 WD |
483 | select_timeout = io_timeout; |
484 | } | |
81791cfc | 485 | |
68f40ebb | 486 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
487 | |
488 | return 0; | |
489 | } | |
490 | ||
7a6421fa AT |
491 | /* send a list of available modules to the client. Don't list those |
492 | with "list = False". */ | |
3591c066 AT |
493 | static void send_listing(int fd) |
494 | { | |
495 | int n = lp_numservices(); | |
496 | int i; | |
063393d6 | 497 | |
c0422cea | 498 | for (i = 0; i < n; i++) { |
3591c066 | 499 | if (lp_list(i)) |
4a7144ee | 500 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 501 | } |
8f04bb36 | 502 | |
daa598df | 503 | if (protocol_version >= 25) |
063393d6 | 504 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
505 | } |
506 | ||
68f40ebb | 507 | /* this is called when a connection is established to a client |
3591c066 AT |
508 | and we want to start talking. The setup of the system is done from |
509 | here */ | |
68f40ebb | 510 | int start_daemon(int f_in, int f_out) |
3591c066 | 511 | { |
7a6421fa | 512 | char line[200]; |
3591c066 | 513 | char *motd; |
c0422cea | 514 | int i; |
4cdf25e4 | 515 | |
da3478b2 WD |
516 | io_set_sock_fds(f_in, f_out); |
517 | ||
2e94e70e | 518 | if (!lp_load(config_file, 0)) |
65417579 | 519 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 520 | |
30e8c8e1 DD |
521 | log_init(); |
522 | ||
68f40ebb WD |
523 | if (!am_server) { |
524 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
525 | set_socket_options(f_in, lp_socket_options()); | |
526 | set_nonblocking(f_in); | |
527 | } | |
3591c066 | 528 | |
5a8543b8 | 529 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
530 | |
531 | motd = lp_motd_file(); | |
27d3cdbc | 532 | if (motd && *motd) { |
0090cbdb | 533 | FILE *f = fopen(motd,"r"); |
3591c066 | 534 | while (f && !feof(f)) { |
2e94e70e | 535 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
536 | if (len > 0) { |
537 | line[len] = 0; | |
68f40ebb | 538 | io_printf(f_out, "%s", line); |
3591c066 AT |
539 | } |
540 | } | |
2e94e70e WD |
541 | if (f) |
542 | fclose(f); | |
68f40ebb | 543 | io_printf(f_out, "\n"); |
3591c066 AT |
544 | } |
545 | ||
2e94e70e | 546 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 547 | return -1; |
91eee594 | 548 | |
daa598df | 549 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 550 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 551 | return -1; |
4a7144ee | 552 | } |
daa598df WD |
553 | if (protocol_version > remote_protocol) |
554 | protocol_version = remote_protocol; | |
91eee594 | 555 | |
c0422cea WD |
556 | line[0] = 0; |
557 | if (!read_line(f_in, line, sizeof line - 1)) | |
558 | return -1; | |
3591c066 | 559 | |
c0422cea WD |
560 | if (!*line || strcmp(line, "#list") == 0) { |
561 | send_listing(f_out); | |
562 | return -1; | |
563 | } | |
3591c066 | 564 | |
c0422cea WD |
565 | if (*line == '#') { |
566 | /* it's some sort of command that I don't understand */ | |
567 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
568 | return -1; | |
569 | } | |
3591c066 | 570 | |
c0422cea WD |
571 | if ((i = lp_number(line)) < 0) { |
572 | char *addr = client_addr(f_in); | |
573 | char *host = client_name(f_in); | |
574 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
575 | line, host, addr); | |
576 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
577 | return -1; | |
3591c066 AT |
578 | } |
579 | ||
68f40ebb | 580 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
581 | } |
582 | ||
583 | ||
584 | int daemon_main(void) | |
585 | { | |
8638dd48 | 586 | char *pid_file; |
1a016bfd | 587 | |
3591c066 | 588 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
589 | int i; |
590 | ||
591 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
592 | * stderr so that library functions (and getopt) don't |
593 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 594 | for (i = 1; i < 3; i++) { |
4a7144ee | 595 | close(i); |
41979ff8 AT |
596 | open("/dev/null", O_RDWR); |
597 | } | |
3eb38818 | 598 | |
68f40ebb | 599 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
600 | } |
601 | ||
13e29995 | 602 | if (!no_detach) |
4a7144ee | 603 | become_daemon(); |
3591c066 | 604 | |
2e94e70e | 605 | if (!lp_load(config_file, 1)) |
65417579 | 606 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 607 | |
0c56b1ad WD |
608 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
609 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 610 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 611 | bind_address = lp_bind_address(); |
0c56b1ad | 612 | |
45a83540 | 613 | log_init(); |
f9e940ef | 614 | |
9e5a5ddb | 615 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
616 | RSYNC_VERSION, rsync_port); |
617 | /* TODO: If listening on a particular address, then show that | |
618 | * address too. In fact, why not just do inet_ntop on the | |
619 | * local address??? */ | |
e42c9458 | 620 | |
8638dd48 | 621 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
622 | char pidbuf[16]; |
623 | int fd; | |
05b7bab8 | 624 | pid_t pid = getpid(); |
8638dd48 | 625 | cleanup_set_pid(pid); |
ad517ce5 DD |
626 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
627 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
628 | cleanup_set_pid(0); |
629 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
630 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 631 | } |
05b7bab8 | 632 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
633 | write(fd, pidbuf, strlen(pidbuf)); |
634 | close(fd); | |
8638dd48 DD |
635 | } |
636 | ||
8ef4ffd6 AT |
637 | start_accept_loop(rsync_port, start_daemon); |
638 | return -1; | |
3591c066 | 639 | } |