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; | |
837cbad9 WD |
50 | extern struct exclude_struct **server_exclude_list; |
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; |
bcb7e502 | 73 | char *p, *user=NULL; |
4a7144ee | 74 | |
68f40ebb | 75 | /* this is redundant with code in start_inband_exchange(), but |
4a7144ee WD |
76 | * this short-circuits a problem before we open a socket, and |
77 | * the extra check won't hurt */ | |
f98df1d9 | 78 | if (*path == '/') { |
ff81e809 | 79 | rprintf(FERROR,"ERROR: The remote path must start with a module name not a /\n"); |
f98df1d9 AT |
80 | return -1; |
81 | } | |
82 | ||
bcb7e502 AT |
83 | p = strchr(host, '@'); |
84 | if (p) { | |
85 | user = host; | |
86 | host = p+1; | |
87 | *p = 0; | |
88 | } | |
89 | ||
1bbd10fe | 90 | if (verbose >= 2) { |
604f343c MP |
91 | /* FIXME: If we're going to use a socket program for |
92 | * testing, then this message is wrong. We need to | |
93 | * say something like "(except really using %s)" */ | |
1264288c MP |
94 | rprintf(FINFO, "opening tcp connection to %s port %d\n", |
95 | host, rsync_port); | |
1bbd10fe | 96 | } |
837cbad9 WD |
97 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
98 | default_af_hint); | |
3591c066 | 99 | if (fd == -1) { |
65417579 | 100 | exit_cleanup(RERR_SOCKETIO); |
3591c066 | 101 | } |
68f40ebb WD |
102 | |
103 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
104 | ||
105 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
106 | } | |
107 | ||
108 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, int argc) | |
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) | |
117 | list_only = 1; | |
118 | ||
119 | if (*path == '/') { | |
120 | rprintf(FERROR, "ERROR: The remote path must start with a module name\n"); | |
121 | return -1; | |
122 | } | |
123 | ||
124 | if (!user) user = getenv("USER"); | |
125 | if (!user) user = getenv("LOGNAME"); | |
126 | ||
4a7144ee WD |
127 | /* set daemon_over_rsh to false since we need to build the |
128 | * true set of args passed through the rsh/ssh connection; | |
129 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
130 | daemon_over_rsh = 0; |
131 | server_options(sargs, &sargc); | |
3591c066 AT |
132 | |
133 | sargs[sargc++] = "."; | |
134 | ||
4a7144ee | 135 | if (path && *path) |
3591c066 AT |
136 | sargs[sargc++] = path; |
137 | ||
138 | sargs[sargc] = NULL; | |
139 | ||
5a8543b8 | 140 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 141 | |
68f40ebb | 142 | if (!read_line(f_in, line, sizeof(line)-1)) { |
be2961da | 143 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
144 | return -1; |
145 | } | |
146 | ||
daa598df | 147 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
148 | /* note that read_line strips of \n or \r */ |
149 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
150 | line); | |
3591c066 AT |
151 | return -1; |
152 | } | |
daa598df WD |
153 | if (protocol_version > remote_protocol) |
154 | protocol_version = remote_protocol; | |
3591c066 | 155 | |
2c91d3d3 AT |
156 | p = strchr(path,'/'); |
157 | if (p) *p = 0; | |
68f40ebb | 158 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
159 | if (p) *p = '/'; |
160 | ||
063393d6 MP |
161 | /* Old servers may just drop the connection here, |
162 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 163 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 164 | |
063393d6 | 165 | while (1) { |
68f40ebb | 166 | if (!read_line(f_in, line, sizeof(line)-1)) { |
be2961da | 167 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
168 | return -1; |
169 | } | |
31593dd6 | 170 | |
31593dd6 | 171 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 172 | auth_client(f_out, user, line+18); |
31593dd6 AT |
173 | continue; |
174 | } | |
31593dd6 | 175 | |
3591c066 | 176 | if (strcmp(line,"@RSYNCD: OK") == 0) break; |
8f04bb36 | 177 | |
cae95647 MP |
178 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
179 | /* This is sent by recent versions of the | |
180 | * server to terminate the listing of modules. | |
181 | * We don't want to go on and transfer | |
182 | * anything; just exit. */ | |
183 | exit(0); | |
184 | } | |
8f04bb36 | 185 | |
136ac7ec | 186 | if (strncmp(line, "@ERROR", 6) == 0) { |
c613d370 | 187 | rprintf(FERROR,"%s\n", line); |
136ac7ec MP |
188 | /* This is always fatal; the server will now |
189 | * close the socket. */ | |
190 | return RERR_STARTCLIENT; | |
191 | } else { | |
c613d370 | 192 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 193 | } |
3591c066 | 194 | } |
7a55d06e | 195 | kludge_around_eof = False; |
3591c066 | 196 | |
68f40ebb WD |
197 | for (i = 0; i < sargc; i++) { |
198 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 199 | } |
68f40ebb | 200 | io_printf(f_out, "\n"); |
3591c066 | 201 | |
daa598df | 202 | if (protocol_version < 23) { |
3f55bd5d | 203 | if (protocol_version == 22 || !am_sender) |
68f40ebb | 204 | io_start_multiplex_in(f_in); |
09b7f5db | 205 | } |
8d9dc9f9 | 206 | |
68f40ebb | 207 | return 0; |
3591c066 AT |
208 | } |
209 | ||
210 | ||
211 | ||
68f40ebb | 212 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 AT |
213 | { |
214 | int argc=0; | |
215 | char *argv[MAX_ARGS]; | |
216 | char **argp; | |
e42c9458 | 217 | char line[MAXPATHLEN]; |
2af27ad9 | 218 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 219 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 220 | char *p; |
09021eab DD |
221 | char *addr = client_addr(f_in); |
222 | char *host = client_name(f_in); | |
874895d5 | 223 | char *name = lp_name(i); |
8638dd48 | 224 | int use_chroot = lp_use_chroot(i); |
874895d5 | 225 | int start_glob=0; |
41979ff8 | 226 | int ret; |
7b372642 | 227 | char *request=NULL; |
56c473b7 AT |
228 | |
229 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
230 | rprintf(FERROR,"rsync denied on module %s from %s (%s)\n", | |
31ec50d7 | 231 | name, host, addr); |
68f40ebb | 232 | io_printf(f_out, "@ERROR: access denied to %s from %s (%s)\n", |
31ec50d7 | 233 | name, host, addr); |
56c473b7 AT |
234 | return -1; |
235 | } | |
3591c066 | 236 | |
68f40ebb WD |
237 | if (am_daemon && am_server) { |
238 | rprintf(FINFO, "rsync allowed access on module %s from %s (%s)\n", | |
239 | name, host, addr); | |
240 | } | |
241 | ||
5e71c444 | 242 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e AT |
243 | if (errno) { |
244 | rprintf(FERROR,"failed to open lock file %s : %s\n", | |
5e71c444 | 245 | lp_lock_file(i), strerror(errno)); |
68f40ebb | 246 | io_printf(f_out, "@ERROR: failed to open lock file %s : %s\n", |
5e71c444 | 247 | lp_lock_file(i), strerror(errno)); |
8d72ef6e AT |
248 | } else { |
249 | rprintf(FERROR,"max connections (%d) reached\n", | |
5e71c444 | 250 | lp_max_connections(i)); |
837cbad9 WD |
251 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
252 | lp_max_connections(i)); | |
8d72ef6e | 253 | } |
0c515f17 AT |
254 | return -1; |
255 | } | |
256 | ||
4a7144ee | 257 | |
68f40ebb | 258 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 259 | |
97cb8dc2 | 260 | if (!auth_user) { |
d0d56395 | 261 | rprintf(FERROR,"auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
262 | name, host, addr); |
263 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 264 | return -1; |
d0d56395 AT |
265 | } |
266 | ||
3591c066 AT |
267 | module_id = i; |
268 | ||
6fe05820 | 269 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 270 | |
716baed7 DD |
271 | if (am_root) { |
272 | p = lp_uid(i); | |
273 | if (!name_to_uid(p, &uid)) { | |
32f76175 | 274 | if (!isdigit(* (unsigned char *) p)) { |
716baed7 | 275 | rprintf(FERROR,"Invalid uid %s\n", p); |
68f40ebb | 276 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 277 | return -1; |
4a7144ee | 278 | } |
716baed7 DD |
279 | uid = atoi(p); |
280 | } | |
281 | ||
282 | p = lp_gid(i); | |
283 | if (!name_to_gid(p, &gid)) { | |
32f76175 | 284 | if (!isdigit(* (unsigned char *) p)) { |
716baed7 | 285 | rprintf(FERROR,"Invalid gid %s\n", p); |
68f40ebb | 286 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 287 | return -1; |
4a7144ee | 288 | } |
716baed7 DD |
289 | gid = atoi(p); |
290 | } | |
8ef4ffd6 | 291 | } |
3b2b5345 | 292 | |
4a7144ee WD |
293 | /* TODO: If we're not root, but the configuration requests |
294 | * that we change to some uid other than the current one, then | |
295 | * log a warning. */ | |
296 | ||
297 | /* TODO: Perhaps take a list of gids, and make them into the | |
298 | * supplementary groups. */ | |
8ef4ffd6 | 299 | |
837cbad9 | 300 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
301 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
302 | exclude_path_prefix = ""; | |
837cbad9 | 303 | |
cd64343a | 304 | p = lp_include_from(i); |
837cbad9 | 305 | add_exclude_file(&server_exclude_list, p, MISSING_FATAL, ADD_INCLUDE); |
cd64343a DD |
306 | |
307 | p = lp_include(i); | |
837cbad9 | 308 | add_exclude_line(&server_exclude_list, p, ADD_INCLUDE); |
cd64343a | 309 | |
8f3a2d54 | 310 | p = lp_exclude_from(i); |
837cbad9 | 311 | add_exclude_file(&server_exclude_list, p, MISSING_FATAL, ADD_EXCLUDE); |
8f3a2d54 | 312 | |
5805327b | 313 | p = lp_exclude(i); |
837cbad9 WD |
314 | add_exclude_line(&server_exclude_list, p, ADD_EXCLUDE); |
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))) { |
a039749b | 334 | rsyserr(FERROR, 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("/")) { |
4a7144ee | 340 | rsyserr(FERROR, 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))) { |
a039749b | 347 | rsyserr(FERROR, 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)) { |
08a740ff | 366 | rsyserr(FERROR, 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)) { | |
374 | rsyserr(FERROR, errno, "setgroups failed"); | |
375 | io_printf(f_out, "@ERROR: setgroups failed\n"); | |
376 | return -1; | |
377 | } | |
378 | #endif | |
3591c066 | 379 | |
716baed7 | 380 | if (setuid(uid)) { |
08a740ff | 381 | rsyserr(FERROR, 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 AT |
390 | |
391 | argv[argc++] = "rsyncd"; | |
392 | ||
393 | while (1) { | |
68f40ebb | 394 | if (!read_line(f_in, line, sizeof(line)-1)) { |
3591c066 AT |
395 | return -1; |
396 | } | |
397 | ||
398 | if (!*line) break; | |
399 | ||
874895d5 AT |
400 | p = line; |
401 | ||
874895d5 | 402 | argv[argc] = strdup(p); |
3591c066 AT |
403 | if (!argv[argc]) { |
404 | return -1; | |
405 | } | |
406 | ||
874895d5 | 407 | if (start_glob) { |
1a016bfd | 408 | if (start_glob == 1) { |
7b372642 | 409 | request = strdup(p); |
1a016bfd AT |
410 | start_glob++; |
411 | } | |
cb13abfe | 412 | glob_expand(name, argv, &argc, MAX_ARGS); |
874895d5 AT |
413 | } else { |
414 | argc++; | |
415 | } | |
416 | ||
417 | if (strcmp(line,".") == 0) { | |
418 | start_glob = 1; | |
419 | } | |
420 | ||
3591c066 AT |
421 | if (argc == MAX_ARGS) { |
422 | return -1; | |
423 | } | |
424 | } | |
425 | ||
cb13abfe | 426 | if (sanitize_paths) { |
8638dd48 DD |
427 | /* |
428 | * Note that this is applied to all parameters, whether or not | |
429 | * they are filenames, but no other legal parameters contain | |
430 | * the forms that need to be sanitized so it doesn't hurt; | |
431 | * it is not known at this point which parameters are files | |
432 | * and which aren't. | |
433 | */ | |
434 | for (i = 1; i < argc; i++) { | |
cb13abfe | 435 | sanitize_path(argv[i], NULL); |
8638dd48 DD |
436 | } |
437 | } | |
438 | ||
4a7144ee | 439 | argp = argv; |
15b7b73d | 440 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 441 | |
7c2a9e76 WD |
442 | if (filesfrom_fd == 0) |
443 | filesfrom_fd = f_in; | |
444 | ||
7b372642 | 445 | if (request) { |
97cb8dc2 | 446 | if (*auth_user) { |
d0d56395 AT |
447 | rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n", |
448 | am_sender?"on":"to", | |
97cb8dc2 | 449 | request, auth_user, host, addr); |
d0d56395 AT |
450 | } else { |
451 | rprintf(FINFO,"rsync %s %s from %s (%s)\n", | |
452 | am_sender?"on":"to", | |
453 | request, host, addr); | |
454 | } | |
7b372642 AT |
455 | free(request); |
456 | } | |
457 | ||
15b7b73d | 458 | #ifndef DEBUG |
3591c066 | 459 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
460 | if (verbose > lp_max_verbosity()) |
461 | verbose = lp_max_verbosity(); | |
0199b05f | 462 | #endif |
3591c066 | 463 | |
daa598df | 464 | if (protocol_version < 23) { |
3f55bd5d | 465 | if (protocol_version == 22 || am_sender) |
68f40ebb | 466 | io_start_multiplex_out(f_out); |
554e0a8d | 467 | } |
15b7b73d | 468 | |
4a7144ee WD |
469 | /* For later protocol versions, we don't start multiplexing |
470 | * until we've configured nonblocking in start_server. That | |
471 | * means we're in a sticky situation now: there's no way to | |
472 | * convey errors to the client. */ | |
473 | ||
474 | /* FIXME: Hold off on reporting option processing errors until | |
475 | * we've set up nonblocking and multiplexed IO and can get the | |
476 | * message back to them. */ | |
41979ff8 | 477 | if (!ret) { |
4a7144ee WD |
478 | option_error(); |
479 | exit_cleanup(RERR_UNSUPPORTED); | |
41979ff8 AT |
480 | } |
481 | ||
81791cfc | 482 | if (lp_timeout(i)) { |
81791cfc AT |
483 | io_timeout = lp_timeout(i); |
484 | } | |
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 | |
3591c066 AT |
498 | for (i=0;i<n;i++) |
499 | if (lp_list(i)) | |
4a7144ee | 500 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
8f04bb36 | 501 | |
daa598df | 502 | if (protocol_version >= 25) |
063393d6 | 503 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
504 | } |
505 | ||
68f40ebb | 506 | /* this is called when a connection is established to a client |
3591c066 AT |
507 | and we want to start talking. The setup of the system is done from |
508 | here */ | |
68f40ebb | 509 | int start_daemon(int f_in, int f_out) |
3591c066 | 510 | { |
7a6421fa | 511 | char line[200]; |
3591c066 | 512 | char *motd; |
8ef4ffd6 | 513 | int i = -1; |
4cdf25e4 | 514 | |
f9e940ef | 515 | if (!lp_load(config_file, 0)) { |
65417579 | 516 | exit_cleanup(RERR_SYNTAX); |
4cdf25e4 | 517 | } |
3591c066 | 518 | |
30e8c8e1 DD |
519 | log_init(); |
520 | ||
68f40ebb WD |
521 | if (!am_server) { |
522 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
523 | set_socket_options(f_in, lp_socket_options()); | |
524 | set_nonblocking(f_in); | |
525 | } | |
3591c066 | 526 | |
5a8543b8 | 527 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
528 | |
529 | motd = lp_motd_file(); | |
27d3cdbc | 530 | if (motd && *motd) { |
0090cbdb | 531 | FILE *f = fopen(motd,"r"); |
3591c066 AT |
532 | while (f && !feof(f)) { |
533 | int len = fread(line, 1, sizeof(line)-1, f); | |
534 | if (len > 0) { | |
535 | line[len] = 0; | |
68f40ebb | 536 | io_printf(f_out, "%s", line); |
3591c066 AT |
537 | } |
538 | } | |
539 | if (f) fclose(f); | |
68f40ebb | 540 | io_printf(f_out, "\n"); |
3591c066 AT |
541 | } |
542 | ||
68f40ebb | 543 | if (!read_line(f_in, line, sizeof(line)-1)) { |
91eee594 AT |
544 | return -1; |
545 | } | |
546 | ||
daa598df | 547 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 548 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 549 | return -1; |
4a7144ee | 550 | } |
daa598df WD |
551 | if (protocol_version > remote_protocol) |
552 | protocol_version = remote_protocol; | |
91eee594 | 553 | |
8ef4ffd6 | 554 | while (i == -1) { |
3591c066 | 555 | line[0] = 0; |
68f40ebb | 556 | if (!read_line(f_in, line, sizeof(line)-1)) { |
3591c066 AT |
557 | return -1; |
558 | } | |
559 | ||
560 | if (!*line || strcmp(line,"#list")==0) { | |
68f40ebb | 561 | send_listing(f_out); |
3591c066 | 562 | return -1; |
4a7144ee | 563 | } |
3591c066 AT |
564 | |
565 | if (*line == '#') { | |
566 | /* it's some sort of command that I don't understand */ | |
68f40ebb | 567 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
3591c066 AT |
568 | return -1; |
569 | } | |
570 | ||
571 | i = lp_number(line); | |
572 | if (i == -1) { | |
68f40ebb | 573 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
3591c066 AT |
574 | return -1; |
575 | } | |
3591c066 AT |
576 | } |
577 | ||
68f40ebb | 578 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
579 | } |
580 | ||
581 | ||
582 | int daemon_main(void) | |
583 | { | |
8638dd48 | 584 | char *pid_file; |
1a016bfd | 585 | |
3591c066 | 586 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
587 | int i; |
588 | ||
589 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
590 | * stderr so that library functions (and getopt) don't |
591 | * try to use them. Redirect them to /dev/null */ | |
41979ff8 | 592 | for (i=1;i<3;i++) { |
4a7144ee | 593 | close(i); |
41979ff8 AT |
594 | open("/dev/null", O_RDWR); |
595 | } | |
3eb38818 | 596 | |
68f40ebb | 597 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
598 | } |
599 | ||
13e29995 | 600 | if (!no_detach) |
4a7144ee | 601 | become_daemon(); |
3591c066 | 602 | |
f9e940ef | 603 | if (!lp_load(config_file, 1)) { |
65417579 | 604 | exit_cleanup(RERR_SYNTAX); |
f9e940ef AT |
605 | } |
606 | ||
45a83540 | 607 | log_init(); |
f9e940ef | 608 | |
a358449a | 609 | rprintf(FINFO, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
610 | RSYNC_VERSION, rsync_port); |
611 | /* TODO: If listening on a particular address, then show that | |
612 | * address too. In fact, why not just do inet_ntop on the | |
613 | * local address??? */ | |
e42c9458 | 614 | |
8638dd48 | 615 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
616 | char pidbuf[16]; |
617 | int fd; | |
05b7bab8 | 618 | pid_t pid = getpid(); |
8638dd48 | 619 | cleanup_set_pid(pid); |
ad517ce5 DD |
620 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
621 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
622 | cleanup_set_pid(0); |
623 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
624 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 625 | } |
05b7bab8 | 626 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
627 | write(fd, pidbuf, strlen(pidbuf)); |
628 | close(fd); | |
8638dd48 DD |
629 | } |
630 | ||
8ef4ffd6 AT |
631 | start_accept_loop(rsync_port, start_daemon); |
632 | return -1; | |
3591c066 | 633 | } |