Commit | Line | Data |
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a039749b | 1 | /* -*- c-file-style: "linux"; -*- |
4a7144ee | 2 | * |
a254fd97 MP |
3 | * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org> |
4 | * Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org> | |
4a7144ee | 5 | * |
a254fd97 MP |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
4a7144ee | 10 | * |
a254fd97 MP |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
4a7144ee | 15 | * |
a254fd97 MP |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
3591c066 | 20 | |
a254fd97 MP |
21 | /** |
22 | * @file | |
23 | * | |
24 | * The socket based protocol for setting up a connection with | |
25 | * rsyncd. | |
26 | **/ | |
3591c066 AT |
27 | |
28 | #include "rsync.h" | |
29 | ||
6e195fe9 WD |
30 | extern int am_sender; |
31 | extern int am_server; | |
32 | extern int am_daemon; | |
33 | extern int am_root; | |
3591c066 AT |
34 | extern int module_id; |
35 | extern int read_only; | |
36 | extern int verbose; | |
37 | extern int rsync_port; | |
6e195fe9 WD |
38 | extern int kludge_around_eof; |
39 | extern int daemon_over_rsh; | |
40 | extern int list_only; | |
b35d0d8e | 41 | extern int sanitize_paths; |
7c2a9e76 | 42 | extern int filesfrom_fd; |
daa598df WD |
43 | extern int remote_protocol; |
44 | extern int protocol_version; | |
6e195fe9 WD |
45 | extern int io_timeout; |
46 | extern int orig_umask; | |
47 | extern int no_detach; | |
48 | extern int default_af_hint; | |
49 | extern char *bind_address; | |
495723bb | 50 | extern struct exclude_list_struct server_exclude_list; |
837cbad9 | 51 | extern char *exclude_path_prefix; |
6e195fe9 WD |
52 | extern char *config_file; |
53 | ||
54 | char *auth_user; | |
3591c066 | 55 | |
be2961da | 56 | /** |
bc363ea9 | 57 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
58 | * function for remote-shell connections is do_cmd(). |
59 | * | |
fdf88d75 MP |
60 | * After negotiating which module to use and reading the server's |
61 | * motd, this hands over to client_run(). Telling the server the | |
62 | * module will cause it to chroot/setuid/etc. | |
63 | * | |
64 | * Instead of doing a transfer, the client may at this stage instead | |
65 | * get a listing of remote modules and exit. | |
be2961da MP |
66 | * |
67 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 68 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 69 | **/ |
3591c066 AT |
70 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
71 | { | |
68f40ebb | 72 | int fd, ret; |
2e94e70e | 73 | char *p, *user = NULL; |
4a7144ee | 74 | |
1732b6c0 WD |
75 | /* This is redundant with code in start_inband_exchange(), but this |
76 | * short-circuits a problem in the client before we open a socket, | |
77 | * and the extra check won't hurt. */ | |
f98df1d9 | 78 | if (*path == '/') { |
1732b6c0 WD |
79 | rprintf(FERROR, |
80 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
81 | return -1; |
82 | } | |
83 | ||
1732b6c0 | 84 | if ((p = strchr(host, '@')) != NULL) { |
bcb7e502 AT |
85 | user = host; |
86 | host = p+1; | |
1732b6c0 | 87 | *p = '\0'; |
bcb7e502 AT |
88 | } |
89 | ||
837cbad9 WD |
90 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
91 | default_af_hint); | |
df5cd107 | 92 | if (fd == -1) |
65417579 | 93 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
94 | |
95 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
96 | ||
97 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
98 | } | |
99 | ||
b9f592fb WD |
100 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
101 | int argc) | |
68f40ebb WD |
102 | { |
103 | int i; | |
104 | char *sargs[MAX_ARGS]; | |
105 | int sargc = 0; | |
106 | char line[MAXPATHLEN]; | |
107 | char *p; | |
68f40ebb WD |
108 | |
109 | if (argc == 0 && !am_sender) | |
110 | list_only = 1; | |
111 | ||
112 | if (*path == '/') { | |
1732b6c0 WD |
113 | rprintf(FERROR, |
114 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
115 | return -1; |
116 | } | |
117 | ||
2e94e70e WD |
118 | if (!user) |
119 | user = getenv("USER"); | |
120 | if (!user) | |
121 | user = getenv("LOGNAME"); | |
68f40ebb | 122 | |
4a7144ee WD |
123 | /* set daemon_over_rsh to false since we need to build the |
124 | * true set of args passed through the rsh/ssh connection; | |
125 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
126 | daemon_over_rsh = 0; |
127 | server_options(sargs, &sargc); | |
3591c066 AT |
128 | |
129 | sargs[sargc++] = "."; | |
130 | ||
4a7144ee | 131 | if (path && *path) |
3591c066 AT |
132 | sargs[sargc++] = path; |
133 | ||
134 | sargs[sargc] = NULL; | |
135 | ||
5a8543b8 | 136 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 137 | |
2e94e70e | 138 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 139 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
140 | return -1; |
141 | } | |
142 | ||
daa598df | 143 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
144 | /* note that read_line strips of \n or \r */ |
145 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
146 | line); | |
3591c066 AT |
147 | return -1; |
148 | } | |
daa598df WD |
149 | if (protocol_version > remote_protocol) |
150 | protocol_version = remote_protocol; | |
3591c066 | 151 | |
2c91d3d3 AT |
152 | p = strchr(path,'/'); |
153 | if (p) *p = 0; | |
68f40ebb | 154 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
155 | if (p) *p = '/'; |
156 | ||
063393d6 MP |
157 | /* Old servers may just drop the connection here, |
158 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 159 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 160 | |
063393d6 | 161 | while (1) { |
2e94e70e | 162 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 163 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
164 | return -1; |
165 | } | |
31593dd6 | 166 | |
31593dd6 | 167 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 168 | auth_client(f_out, user, line+18); |
31593dd6 AT |
169 | continue; |
170 | } | |
31593dd6 | 171 | |
2e94e70e WD |
172 | if (strcmp(line,"@RSYNCD: OK") == 0) |
173 | break; | |
8f04bb36 | 174 | |
cae95647 MP |
175 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
176 | /* This is sent by recent versions of the | |
177 | * server to terminate the listing of modules. | |
178 | * We don't want to go on and transfer | |
179 | * anything; just exit. */ | |
180 | exit(0); | |
181 | } | |
8f04bb36 | 182 | |
136ac7ec | 183 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 184 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
185 | /* This is always fatal; the server will now |
186 | * close the socket. */ | |
187 | return RERR_STARTCLIENT; | |
188 | } else { | |
c613d370 | 189 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 190 | } |
3591c066 | 191 | } |
7a55d06e | 192 | kludge_around_eof = False; |
3591c066 | 193 | |
68f40ebb WD |
194 | for (i = 0; i < sargc; i++) { |
195 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 196 | } |
68f40ebb | 197 | io_printf(f_out, "\n"); |
3591c066 | 198 | |
daa598df | 199 | if (protocol_version < 23) { |
3f55bd5d | 200 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 201 | io_start_multiplex_in(); |
09b7f5db | 202 | } |
8d9dc9f9 | 203 | |
68f40ebb | 204 | return 0; |
3591c066 AT |
205 | } |
206 | ||
207 | ||
208 | ||
68f40ebb | 209 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 210 | { |
2e94e70e | 211 | int argc = 0; |
b7061c82 WD |
212 | int maxargs; |
213 | char **argv; | |
3591c066 | 214 | char **argp; |
e42c9458 | 215 | char line[MAXPATHLEN]; |
2af27ad9 | 216 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 217 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 218 | char *p; |
09021eab DD |
219 | char *addr = client_addr(f_in); |
220 | char *host = client_name(f_in); | |
874895d5 | 221 | char *name = lp_name(i); |
8638dd48 | 222 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 223 | int start_glob = 0; |
41979ff8 | 224 | int ret; |
2e94e70e | 225 | char *request = NULL; |
56c473b7 AT |
226 | |
227 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 228 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 229 | name, host, addr); |
68f40ebb | 230 | io_printf(f_out, "@ERROR: access denied to %s from %s (%s)\n", |
31ec50d7 | 231 | name, host, addr); |
56c473b7 AT |
232 | return -1; |
233 | } | |
3591c066 | 234 | |
68f40ebb | 235 | if (am_daemon && am_server) { |
9e5a5ddb | 236 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
237 | name, host, addr); |
238 | } | |
239 | ||
5e71c444 | 240 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 241 | if (errno) { |
1732b6c0 | 242 | rsyserr(FLOG, errno, "failed to open lock file %s", |
d62bcc17 WD |
243 | lp_lock_file(i)); |
244 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
245 | lp_lock_file(i)); | |
8d72ef6e | 246 | } else { |
1732b6c0 | 247 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 248 | lp_max_connections(i)); |
837cbad9 WD |
249 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
250 | lp_max_connections(i)); | |
8d72ef6e | 251 | } |
0c515f17 AT |
252 | return -1; |
253 | } | |
254 | ||
68f40ebb | 255 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 256 | |
97cb8dc2 | 257 | if (!auth_user) { |
1732b6c0 | 258 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
259 | name, host, addr); |
260 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 261 | return -1; |
d0d56395 AT |
262 | } |
263 | ||
3591c066 AT |
264 | module_id = i; |
265 | ||
6fe05820 | 266 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 267 | |
716baed7 DD |
268 | if (am_root) { |
269 | p = lp_uid(i); | |
270 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 271 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 272 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 273 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 274 | return -1; |
4a7144ee | 275 | } |
716baed7 DD |
276 | uid = atoi(p); |
277 | } | |
278 | ||
279 | p = lp_gid(i); | |
280 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 281 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 282 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 283 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 284 | return -1; |
4a7144ee | 285 | } |
716baed7 DD |
286 | gid = atoi(p); |
287 | } | |
8ef4ffd6 | 288 | } |
3b2b5345 | 289 | |
4a7144ee WD |
290 | /* TODO: If we're not root, but the configuration requests |
291 | * that we change to some uid other than the current one, then | |
292 | * log a warning. */ | |
293 | ||
294 | /* TODO: Perhaps take a list of gids, and make them into the | |
295 | * supplementary groups. */ | |
8ef4ffd6 | 296 | |
837cbad9 | 297 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
298 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
299 | exclude_path_prefix = ""; | |
837cbad9 | 300 | |
cd64343a | 301 | p = lp_include_from(i); |
357406ec WD |
302 | add_exclude_file(&server_exclude_list, p, |
303 | XFLG_FATAL_ERRORS | XFLG_DEF_INCLUDE); | |
cd64343a DD |
304 | |
305 | p = lp_include(i); | |
357406ec WD |
306 | add_exclude(&server_exclude_list, p, |
307 | XFLG_WORD_SPLIT | XFLG_DEF_INCLUDE); | |
cd64343a | 308 | |
8f3a2d54 | 309 | p = lp_exclude_from(i); |
357406ec WD |
310 | add_exclude_file(&server_exclude_list, p, |
311 | XFLG_FATAL_ERRORS); | |
8f3a2d54 | 312 | |
5805327b | 313 | p = lp_exclude(i); |
357406ec | 314 | add_exclude(&server_exclude_list, p, XFLG_WORD_SPLIT); |
837cbad9 WD |
315 | |
316 | exclude_path_prefix = NULL; | |
8f3a2d54 | 317 | |
45a83540 | 318 | log_init(); |
1a016bfd | 319 | |
8638dd48 | 320 | if (use_chroot) { |
b52c1d9d MP |
321 | /* |
322 | * XXX: The 'use chroot' flag is a fairly reliable | |
323 | * source of confusion, because it fails under two | |
324 | * important circumstances: running as non-root, | |
325 | * running on Win32 (or possibly others). On the | |
326 | * other hand, if you are running as root, then it | |
327 | * might be better to always use chroot. | |
328 | * | |
329 | * So, perhaps if we can't chroot we should just issue | |
330 | * a warning, unless a "require chroot" flag is set, | |
331 | * in which case we fail. | |
332 | */ | |
8638dd48 | 333 | if (chroot(lp_path(i))) { |
1732b6c0 | 334 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 335 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
336 | return -1; |
337 | } | |
3591c066 | 338 | |
59187666 | 339 | if (!push_dir("/")) { |
1732b6c0 | 340 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 341 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
342 | return -1; |
343 | } | |
3591c066 | 344 | |
716baed7 | 345 | } else { |
59187666 | 346 | if (!push_dir(lp_path(i))) { |
1732b6c0 | 347 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 348 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
349 | return -1; |
350 | } | |
cb13abfe | 351 | sanitize_paths = 1; |
716baed7 DD |
352 | } |
353 | ||
354 | if (am_root) { | |
715d1f45 MP |
355 | /* XXXX: You could argue that if the daemon is started |
356 | * by a non-root user and they explicitly specify a | |
357 | * gid, then we should try to change to that gid -- | |
358 | * this could be possible if it's already in their | |
359 | * supplementary groups. */ | |
360 | ||
361 | /* TODO: Perhaps we need to document that if rsyncd is | |
362 | * started by somebody other than root it will inherit | |
363 | * all their supplementary groups. */ | |
364 | ||
716baed7 | 365 | if (setgid(gid)) { |
1732b6c0 | 366 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 367 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
368 | return -1; |
369 | } | |
6969ebcf WD |
370 | #ifdef HAVE_SETGROUPS |
371 | /* Get rid of any supplementary groups this process | |
372 | * might have inheristed. */ | |
373 | if (setgroups(1, &gid)) { | |
1732b6c0 | 374 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
375 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
376 | return -1; | |
377 | } | |
378 | #endif | |
3591c066 | 379 | |
716baed7 | 380 | if (setuid(uid)) { |
1732b6c0 | 381 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 382 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
383 | return -1; |
384 | } | |
385 | ||
6fe05820 | 386 | am_root = (MY_UID() == 0); |
3591c066 AT |
387 | } |
388 | ||
68f40ebb | 389 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 390 | |
b7061c82 WD |
391 | maxargs = MAX_ARGS; |
392 | if (!(argv = new_array(char *, maxargs))) | |
393 | out_of_memory("rsync_module"); | |
3591c066 AT |
394 | argv[argc++] = "rsyncd"; |
395 | ||
396 | while (1) { | |
2e94e70e | 397 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 398 | return -1; |
3591c066 | 399 | |
2e94e70e WD |
400 | if (!*line) |
401 | break; | |
3591c066 | 402 | |
874895d5 AT |
403 | p = line; |
404 | ||
b7061c82 WD |
405 | if (argc == maxargs) { |
406 | maxargs += MAX_ARGS; | |
407 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
408 | out_of_memory("rsync_module"); | |
409 | } | |
2e94e70e | 410 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 411 | out_of_memory("rsync_module"); |
3591c066 | 412 | |
874895d5 | 413 | if (start_glob) { |
1a016bfd | 414 | if (start_glob == 1) { |
7b372642 | 415 | request = strdup(p); |
1a016bfd AT |
416 | start_glob++; |
417 | } | |
b7061c82 | 418 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 419 | } else |
874895d5 | 420 | argc++; |
874895d5 | 421 | |
2e94e70e | 422 | if (strcmp(line, ".") == 0) |
874895d5 | 423 | start_glob = 1; |
3591c066 AT |
424 | } |
425 | ||
4a7144ee | 426 | argp = argv; |
15b7b73d | 427 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 428 | |
7c2a9e76 WD |
429 | if (filesfrom_fd == 0) |
430 | filesfrom_fd = f_in; | |
431 | ||
7b372642 | 432 | if (request) { |
97cb8dc2 | 433 | if (*auth_user) { |
9e5a5ddb WD |
434 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
435 | am_sender ? "on" : "to", | |
97cb8dc2 | 436 | request, auth_user, host, addr); |
d0d56395 | 437 | } else { |
9e5a5ddb WD |
438 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
439 | am_sender ? "on" : "to", | |
d0d56395 AT |
440 | request, host, addr); |
441 | } | |
7b372642 AT |
442 | free(request); |
443 | } | |
444 | ||
15b7b73d | 445 | #ifndef DEBUG |
3591c066 | 446 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
447 | if (verbose > lp_max_verbosity()) |
448 | verbose = lp_max_verbosity(); | |
0199b05f | 449 | #endif |
3591c066 | 450 | |
1732b6c0 WD |
451 | if (protocol_version < 23 |
452 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 453 | io_start_multiplex_out(); |
1732b6c0 WD |
454 | else if (!ret) { |
455 | /* We have to get I/O multiplexing started so that we can | |
456 | * get the error back to the client. This means getting | |
457 | * the protocol setup finished first in later versions. */ | |
458 | setup_protocol(f_out, f_in); | |
da3478b2 | 459 | io_start_multiplex_out(); |
554e0a8d | 460 | } |
15b7b73d | 461 | |
41979ff8 | 462 | if (!ret) { |
4a7144ee | 463 | option_error(); |
7e561438 | 464 | msleep(400); |
4a7144ee | 465 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
466 | } |
467 | ||
2e94e70e | 468 | if (lp_timeout(i)) |
81791cfc | 469 | io_timeout = lp_timeout(i); |
81791cfc | 470 | |
68f40ebb | 471 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
472 | |
473 | return 0; | |
474 | } | |
475 | ||
7a6421fa AT |
476 | /* send a list of available modules to the client. Don't list those |
477 | with "list = False". */ | |
3591c066 AT |
478 | static void send_listing(int fd) |
479 | { | |
480 | int n = lp_numservices(); | |
481 | int i; | |
063393d6 | 482 | |
2e94e70e | 483 | for (i = 0; i < n; i++) |
3591c066 | 484 | if (lp_list(i)) |
4a7144ee | 485 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
8f04bb36 | 486 | |
daa598df | 487 | if (protocol_version >= 25) |
063393d6 | 488 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
489 | } |
490 | ||
68f40ebb | 491 | /* this is called when a connection is established to a client |
3591c066 AT |
492 | and we want to start talking. The setup of the system is done from |
493 | here */ | |
68f40ebb | 494 | int start_daemon(int f_in, int f_out) |
3591c066 | 495 | { |
7a6421fa | 496 | char line[200]; |
3591c066 | 497 | char *motd; |
8ef4ffd6 | 498 | int i = -1; |
4cdf25e4 | 499 | |
da3478b2 WD |
500 | io_set_sock_fds(f_in, f_out); |
501 | ||
2e94e70e | 502 | if (!lp_load(config_file, 0)) |
65417579 | 503 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 504 | |
30e8c8e1 DD |
505 | log_init(); |
506 | ||
68f40ebb WD |
507 | if (!am_server) { |
508 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
509 | set_socket_options(f_in, lp_socket_options()); | |
510 | set_nonblocking(f_in); | |
511 | } | |
3591c066 | 512 | |
5a8543b8 | 513 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
514 | |
515 | motd = lp_motd_file(); | |
27d3cdbc | 516 | if (motd && *motd) { |
0090cbdb | 517 | FILE *f = fopen(motd,"r"); |
3591c066 | 518 | while (f && !feof(f)) { |
2e94e70e | 519 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
520 | if (len > 0) { |
521 | line[len] = 0; | |
68f40ebb | 522 | io_printf(f_out, "%s", line); |
3591c066 AT |
523 | } |
524 | } | |
2e94e70e WD |
525 | if (f) |
526 | fclose(f); | |
68f40ebb | 527 | io_printf(f_out, "\n"); |
3591c066 AT |
528 | } |
529 | ||
2e94e70e | 530 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 531 | return -1; |
91eee594 | 532 | |
daa598df | 533 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 534 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 535 | return -1; |
4a7144ee | 536 | } |
daa598df WD |
537 | if (protocol_version > remote_protocol) |
538 | protocol_version = remote_protocol; | |
91eee594 | 539 | |
8ef4ffd6 | 540 | while (i == -1) { |
3591c066 | 541 | line[0] = 0; |
2e94e70e | 542 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 543 | return -1; |
3591c066 | 544 | |
2e94e70e | 545 | if (!*line || strcmp(line,"#list") == 0) { |
68f40ebb | 546 | send_listing(f_out); |
3591c066 | 547 | return -1; |
4a7144ee | 548 | } |
3591c066 AT |
549 | |
550 | if (*line == '#') { | |
551 | /* it's some sort of command that I don't understand */ | |
68f40ebb | 552 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
3591c066 AT |
553 | return -1; |
554 | } | |
555 | ||
556 | i = lp_number(line); | |
557 | if (i == -1) { | |
68f40ebb | 558 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
3591c066 AT |
559 | return -1; |
560 | } | |
3591c066 AT |
561 | } |
562 | ||
68f40ebb | 563 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
564 | } |
565 | ||
566 | ||
567 | int daemon_main(void) | |
568 | { | |
8638dd48 | 569 | char *pid_file; |
1a016bfd | 570 | |
3591c066 | 571 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
572 | int i; |
573 | ||
574 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
575 | * stderr so that library functions (and getopt) don't |
576 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 577 | for (i = 1; i < 3; i++) { |
4a7144ee | 578 | close(i); |
41979ff8 AT |
579 | open("/dev/null", O_RDWR); |
580 | } | |
3eb38818 | 581 | |
68f40ebb | 582 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
583 | } |
584 | ||
13e29995 | 585 | if (!no_detach) |
4a7144ee | 586 | become_daemon(); |
3591c066 | 587 | |
2e94e70e | 588 | if (!lp_load(config_file, 1)) |
65417579 | 589 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 590 | |
45a83540 | 591 | log_init(); |
f9e940ef | 592 | |
9e5a5ddb | 593 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
594 | RSYNC_VERSION, rsync_port); |
595 | /* TODO: If listening on a particular address, then show that | |
596 | * address too. In fact, why not just do inet_ntop on the | |
597 | * local address??? */ | |
e42c9458 | 598 | |
8638dd48 | 599 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
600 | char pidbuf[16]; |
601 | int fd; | |
05b7bab8 | 602 | pid_t pid = getpid(); |
8638dd48 | 603 | cleanup_set_pid(pid); |
ad517ce5 DD |
604 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
605 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
606 | cleanup_set_pid(0); |
607 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
608 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 609 | } |
05b7bab8 | 610 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
611 | write(fd, pidbuf, strlen(pidbuf)); |
612 | close(fd); | |
8638dd48 DD |
613 | } |
614 | ||
8ef4ffd6 AT |
615 | start_accept_loop(rsync_port, start_daemon); |
616 | return -1; | |
3591c066 | 617 | } |