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 | ||
30 | extern int module_id; | |
31 | extern int read_only; | |
32 | extern int verbose; | |
33 | extern int rsync_port; | |
97cb8dc2 | 34 | char *auth_user; |
b35d0d8e | 35 | extern int sanitize_paths; |
7c2a9e76 | 36 | extern int filesfrom_fd; |
daa598df WD |
37 | extern int remote_protocol; |
38 | extern int protocol_version; | |
837cbad9 WD |
39 | extern struct exclude_struct **server_exclude_list; |
40 | extern char *exclude_path_prefix; | |
3591c066 | 41 | |
be2961da | 42 | /** |
bc363ea9 | 43 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
44 | * function for remote-shell connections is do_cmd(). |
45 | * | |
fdf88d75 MP |
46 | * After negotiating which module to use and reading the server's |
47 | * motd, this hands over to client_run(). Telling the server the | |
48 | * module will cause it to chroot/setuid/etc. | |
49 | * | |
50 | * Instead of doing a transfer, the client may at this stage instead | |
51 | * get a listing of remote modules and exit. | |
be2961da MP |
52 | * |
53 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 54 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 55 | **/ |
3591c066 AT |
56 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
57 | { | |
68f40ebb | 58 | int fd, ret; |
bcb7e502 | 59 | char *p, *user=NULL; |
06963d0f | 60 | extern char *bind_address; |
13e29995 | 61 | extern int default_af_hint; |
4a7144ee | 62 | |
68f40ebb | 63 | /* this is redundant with code in start_inband_exchange(), but |
4a7144ee WD |
64 | * this short-circuits a problem before we open a socket, and |
65 | * the extra check won't hurt */ | |
f98df1d9 | 66 | if (*path == '/') { |
ff81e809 | 67 | rprintf(FERROR,"ERROR: The remote path must start with a module name not a /\n"); |
f98df1d9 AT |
68 | return -1; |
69 | } | |
70 | ||
bcb7e502 AT |
71 | p = strchr(host, '@'); |
72 | if (p) { | |
73 | user = host; | |
74 | host = p+1; | |
75 | *p = 0; | |
76 | } | |
77 | ||
1bbd10fe | 78 | if (verbose >= 2) { |
604f343c MP |
79 | /* FIXME: If we're going to use a socket program for |
80 | * testing, then this message is wrong. We need to | |
81 | * say something like "(except really using %s)" */ | |
1264288c MP |
82 | rprintf(FINFO, "opening tcp connection to %s port %d\n", |
83 | host, rsync_port); | |
1bbd10fe | 84 | } |
837cbad9 WD |
85 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
86 | default_af_hint); | |
3591c066 | 87 | if (fd == -1) { |
65417579 | 88 | exit_cleanup(RERR_SOCKETIO); |
3591c066 | 89 | } |
68f40ebb WD |
90 | |
91 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
92 | ||
93 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
94 | } | |
95 | ||
96 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, int argc) | |
97 | { | |
98 | int i; | |
99 | char *sargs[MAX_ARGS]; | |
100 | int sargc = 0; | |
101 | char line[MAXPATHLEN]; | |
102 | char *p; | |
68f40ebb WD |
103 | extern int kludge_around_eof; |
104 | extern int am_sender; | |
105 | extern int daemon_over_rsh; | |
106 | extern int list_only; | |
107 | ||
108 | if (argc == 0 && !am_sender) | |
109 | list_only = 1; | |
110 | ||
111 | if (*path == '/') { | |
112 | rprintf(FERROR, "ERROR: The remote path must start with a module name\n"); | |
113 | return -1; | |
114 | } | |
115 | ||
116 | if (!user) user = getenv("USER"); | |
117 | if (!user) user = getenv("LOGNAME"); | |
118 | ||
4a7144ee WD |
119 | /* set daemon_over_rsh to false since we need to build the |
120 | * true set of args passed through the rsh/ssh connection; | |
121 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
122 | daemon_over_rsh = 0; |
123 | server_options(sargs, &sargc); | |
3591c066 AT |
124 | |
125 | sargs[sargc++] = "."; | |
126 | ||
4a7144ee | 127 | if (path && *path) |
3591c066 AT |
128 | sargs[sargc++] = path; |
129 | ||
130 | sargs[sargc] = NULL; | |
131 | ||
68f40ebb | 132 | io_printf(f_out, "@RSYNCD: %d\n", PROTOCOL_VERSION); |
91eee594 | 133 | |
68f40ebb | 134 | if (!read_line(f_in, line, sizeof(line)-1)) { |
be2961da | 135 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
136 | return -1; |
137 | } | |
138 | ||
daa598df | 139 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
140 | /* note that read_line strips of \n or \r */ |
141 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
142 | line); | |
3591c066 AT |
143 | return -1; |
144 | } | |
daa598df WD |
145 | if (protocol_version > remote_protocol) |
146 | protocol_version = remote_protocol; | |
3591c066 | 147 | |
2c91d3d3 AT |
148 | p = strchr(path,'/'); |
149 | if (p) *p = 0; | |
68f40ebb | 150 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
151 | if (p) *p = '/'; |
152 | ||
063393d6 MP |
153 | /* Old servers may just drop the connection here, |
154 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 155 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 156 | |
063393d6 | 157 | while (1) { |
68f40ebb | 158 | if (!read_line(f_in, line, sizeof(line)-1)) { |
be2961da | 159 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
160 | return -1; |
161 | } | |
31593dd6 | 162 | |
31593dd6 | 163 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 164 | auth_client(f_out, user, line+18); |
31593dd6 AT |
165 | continue; |
166 | } | |
31593dd6 | 167 | |
3591c066 | 168 | if (strcmp(line,"@RSYNCD: OK") == 0) break; |
8f04bb36 | 169 | |
cae95647 MP |
170 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
171 | /* This is sent by recent versions of the | |
172 | * server to terminate the listing of modules. | |
173 | * We don't want to go on and transfer | |
174 | * anything; just exit. */ | |
175 | exit(0); | |
176 | } | |
8f04bb36 | 177 | |
136ac7ec | 178 | if (strncmp(line, "@ERROR", 6) == 0) { |
c613d370 | 179 | rprintf(FERROR,"%s\n", line); |
136ac7ec MP |
180 | /* This is always fatal; the server will now |
181 | * close the socket. */ | |
182 | return RERR_STARTCLIENT; | |
183 | } else { | |
c613d370 | 184 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 185 | } |
3591c066 | 186 | } |
7a55d06e | 187 | kludge_around_eof = False; |
3591c066 | 188 | |
68f40ebb WD |
189 | for (i = 0; i < sargc; i++) { |
190 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 191 | } |
68f40ebb | 192 | io_printf(f_out, "\n"); |
3591c066 | 193 | |
daa598df WD |
194 | if (protocol_version < 23) { |
195 | if (protocol_version == 22 || (protocol_version > 17 && !am_sender)) | |
68f40ebb | 196 | io_start_multiplex_in(f_in); |
09b7f5db | 197 | } |
8d9dc9f9 | 198 | |
68f40ebb | 199 | return 0; |
3591c066 AT |
200 | } |
201 | ||
202 | ||
203 | ||
68f40ebb | 204 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 AT |
205 | { |
206 | int argc=0; | |
207 | char *argv[MAX_ARGS]; | |
208 | char **argp; | |
e42c9458 | 209 | char line[MAXPATHLEN]; |
2af27ad9 | 210 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 211 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 212 | char *p; |
09021eab DD |
213 | char *addr = client_addr(f_in); |
214 | char *host = client_name(f_in); | |
874895d5 | 215 | char *name = lp_name(i); |
8638dd48 | 216 | int use_chroot = lp_use_chroot(i); |
874895d5 | 217 | int start_glob=0; |
41979ff8 | 218 | int ret; |
7b372642 AT |
219 | char *request=NULL; |
220 | extern int am_sender; | |
68f40ebb WD |
221 | extern int am_server; |
222 | extern int am_daemon; | |
943882a2 | 223 | extern int am_root; |
56c473b7 AT |
224 | |
225 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
226 | rprintf(FERROR,"rsync denied on module %s from %s (%s)\n", | |
31ec50d7 | 227 | name, host, addr); |
68f40ebb | 228 | io_printf(f_out, "@ERROR: access denied to %s from %s (%s)\n", |
31ec50d7 | 229 | name, host, addr); |
56c473b7 AT |
230 | return -1; |
231 | } | |
3591c066 | 232 | |
68f40ebb WD |
233 | if (am_daemon && am_server) { |
234 | rprintf(FINFO, "rsync allowed access on module %s from %s (%s)\n", | |
235 | name, host, addr); | |
236 | } | |
237 | ||
5e71c444 | 238 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e AT |
239 | if (errno) { |
240 | rprintf(FERROR,"failed to open lock file %s : %s\n", | |
5e71c444 | 241 | lp_lock_file(i), strerror(errno)); |
68f40ebb | 242 | io_printf(f_out, "@ERROR: failed to open lock file %s : %s\n", |
5e71c444 | 243 | lp_lock_file(i), strerror(errno)); |
8d72ef6e AT |
244 | } else { |
245 | rprintf(FERROR,"max connections (%d) reached\n", | |
5e71c444 | 246 | lp_max_connections(i)); |
837cbad9 WD |
247 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
248 | lp_max_connections(i)); | |
8d72ef6e | 249 | } |
0c515f17 AT |
250 | return -1; |
251 | } | |
252 | ||
4a7144ee | 253 | |
68f40ebb | 254 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 255 | |
97cb8dc2 | 256 | if (!auth_user) { |
d0d56395 | 257 | rprintf(FERROR,"auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
258 | name, host, addr); |
259 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 260 | return -1; |
d0d56395 AT |
261 | } |
262 | ||
3591c066 AT |
263 | module_id = i; |
264 | ||
716baed7 | 265 | am_root = (getuid() == 0); |
8ef4ffd6 | 266 | |
716baed7 DD |
267 | if (am_root) { |
268 | p = lp_uid(i); | |
269 | if (!name_to_uid(p, &uid)) { | |
32f76175 | 270 | if (!isdigit(* (unsigned char *) p)) { |
716baed7 | 271 | rprintf(FERROR,"Invalid uid %s\n", p); |
68f40ebb | 272 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 273 | return -1; |
4a7144ee | 274 | } |
716baed7 DD |
275 | uid = atoi(p); |
276 | } | |
277 | ||
278 | p = lp_gid(i); | |
279 | if (!name_to_gid(p, &gid)) { | |
32f76175 | 280 | if (!isdigit(* (unsigned char *) p)) { |
716baed7 | 281 | rprintf(FERROR,"Invalid gid %s\n", p); |
68f40ebb | 282 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 283 | return -1; |
4a7144ee | 284 | } |
716baed7 DD |
285 | gid = atoi(p); |
286 | } | |
8ef4ffd6 | 287 | } |
3b2b5345 | 288 | |
4a7144ee WD |
289 | /* TODO: If we're not root, but the configuration requests |
290 | * that we change to some uid other than the current one, then | |
291 | * log a warning. */ | |
292 | ||
293 | /* TODO: Perhaps take a list of gids, and make them into the | |
294 | * supplementary groups. */ | |
8ef4ffd6 | 295 | |
837cbad9 | 296 | exclude_path_prefix = use_chroot? "" : lp_path(i); |
e80a7654 WD |
297 | if (*exclude_path_prefix == '/' && !exclude_path_prefix[1]) |
298 | exclude_path_prefix = ""; | |
837cbad9 | 299 | |
cd64343a | 300 | p = lp_include_from(i); |
837cbad9 | 301 | add_exclude_file(&server_exclude_list, p, MISSING_FATAL, ADD_INCLUDE); |
cd64343a DD |
302 | |
303 | p = lp_include(i); | |
837cbad9 | 304 | add_exclude_line(&server_exclude_list, p, ADD_INCLUDE); |
cd64343a | 305 | |
8f3a2d54 | 306 | p = lp_exclude_from(i); |
837cbad9 | 307 | add_exclude_file(&server_exclude_list, p, MISSING_FATAL, ADD_EXCLUDE); |
8f3a2d54 | 308 | |
5805327b | 309 | p = lp_exclude(i); |
837cbad9 WD |
310 | add_exclude_line(&server_exclude_list, p, ADD_EXCLUDE); |
311 | ||
312 | exclude_path_prefix = NULL; | |
8f3a2d54 | 313 | |
45a83540 | 314 | log_init(); |
1a016bfd | 315 | |
8638dd48 | 316 | if (use_chroot) { |
b52c1d9d MP |
317 | /* |
318 | * XXX: The 'use chroot' flag is a fairly reliable | |
319 | * source of confusion, because it fails under two | |
320 | * important circumstances: running as non-root, | |
321 | * running on Win32 (or possibly others). On the | |
322 | * other hand, if you are running as root, then it | |
323 | * might be better to always use chroot. | |
324 | * | |
325 | * So, perhaps if we can't chroot we should just issue | |
326 | * a warning, unless a "require chroot" flag is set, | |
327 | * in which case we fail. | |
328 | */ | |
8638dd48 | 329 | if (chroot(lp_path(i))) { |
a039749b | 330 | rsyserr(FERROR, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 331 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
332 | return -1; |
333 | } | |
3591c066 | 334 | |
c226b7c2 | 335 | if (!push_dir("/", 0)) { |
4a7144ee | 336 | rsyserr(FERROR, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 337 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
338 | return -1; |
339 | } | |
3591c066 | 340 | |
716baed7 DD |
341 | } else { |
342 | if (!push_dir(lp_path(i), 0)) { | |
a039749b | 343 | rsyserr(FERROR, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 344 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
345 | return -1; |
346 | } | |
cb13abfe | 347 | sanitize_paths = 1; |
716baed7 DD |
348 | } |
349 | ||
350 | if (am_root) { | |
715d1f45 MP |
351 | /* XXXX: You could argue that if the daemon is started |
352 | * by a non-root user and they explicitly specify a | |
353 | * gid, then we should try to change to that gid -- | |
354 | * this could be possible if it's already in their | |
355 | * supplementary groups. */ | |
356 | ||
357 | /* TODO: Perhaps we need to document that if rsyncd is | |
358 | * started by somebody other than root it will inherit | |
359 | * all their supplementary groups. */ | |
360 | ||
716baed7 | 361 | if (setgid(gid)) { |
08a740ff | 362 | rsyserr(FERROR, errno, "setgid %d failed", (int) gid); |
68f40ebb | 363 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
364 | return -1; |
365 | } | |
6969ebcf WD |
366 | #ifdef HAVE_SETGROUPS |
367 | /* Get rid of any supplementary groups this process | |
368 | * might have inheristed. */ | |
369 | if (setgroups(1, &gid)) { | |
370 | rsyserr(FERROR, errno, "setgroups failed"); | |
371 | io_printf(f_out, "@ERROR: setgroups failed\n"); | |
372 | return -1; | |
373 | } | |
374 | #endif | |
3591c066 | 375 | |
716baed7 | 376 | if (setuid(uid)) { |
08a740ff | 377 | rsyserr(FERROR, errno, "setuid %d failed", (int) uid); |
68f40ebb | 378 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
379 | return -1; |
380 | } | |
381 | ||
716baed7 | 382 | am_root = (getuid() == 0); |
3591c066 AT |
383 | } |
384 | ||
68f40ebb | 385 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 AT |
386 | |
387 | argv[argc++] = "rsyncd"; | |
388 | ||
389 | while (1) { | |
68f40ebb | 390 | if (!read_line(f_in, line, sizeof(line)-1)) { |
3591c066 AT |
391 | return -1; |
392 | } | |
393 | ||
394 | if (!*line) break; | |
395 | ||
874895d5 AT |
396 | p = line; |
397 | ||
874895d5 | 398 | argv[argc] = strdup(p); |
3591c066 AT |
399 | if (!argv[argc]) { |
400 | return -1; | |
401 | } | |
402 | ||
874895d5 | 403 | if (start_glob) { |
1a016bfd | 404 | if (start_glob == 1) { |
7b372642 | 405 | request = strdup(p); |
1a016bfd AT |
406 | start_glob++; |
407 | } | |
cb13abfe | 408 | glob_expand(name, argv, &argc, MAX_ARGS); |
874895d5 AT |
409 | } else { |
410 | argc++; | |
411 | } | |
412 | ||
413 | if (strcmp(line,".") == 0) { | |
414 | start_glob = 1; | |
415 | } | |
416 | ||
3591c066 AT |
417 | if (argc == MAX_ARGS) { |
418 | return -1; | |
419 | } | |
420 | } | |
421 | ||
cb13abfe | 422 | if (sanitize_paths) { |
8638dd48 DD |
423 | /* |
424 | * Note that this is applied to all parameters, whether or not | |
425 | * they are filenames, but no other legal parameters contain | |
426 | * the forms that need to be sanitized so it doesn't hurt; | |
427 | * it is not known at this point which parameters are files | |
428 | * and which aren't. | |
429 | */ | |
430 | for (i = 1; i < argc; i++) { | |
cb13abfe | 431 | sanitize_path(argv[i], NULL); |
8638dd48 DD |
432 | } |
433 | } | |
434 | ||
4a7144ee | 435 | argp = argv; |
15b7b73d | 436 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 437 | |
7c2a9e76 WD |
438 | if (filesfrom_fd == 0) |
439 | filesfrom_fd = f_in; | |
440 | ||
7b372642 | 441 | if (request) { |
97cb8dc2 | 442 | if (*auth_user) { |
d0d56395 AT |
443 | rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n", |
444 | am_sender?"on":"to", | |
97cb8dc2 | 445 | request, auth_user, host, addr); |
d0d56395 AT |
446 | } else { |
447 | rprintf(FINFO,"rsync %s %s from %s (%s)\n", | |
448 | am_sender?"on":"to", | |
449 | request, host, addr); | |
450 | } | |
7b372642 AT |
451 | free(request); |
452 | } | |
453 | ||
15b7b73d | 454 | #ifndef DEBUG |
3591c066 AT |
455 | /* don't allow the logs to be flooded too fast */ |
456 | if (verbose > 1) verbose = 1; | |
0199b05f | 457 | #endif |
3591c066 | 458 | |
daa598df WD |
459 | if (protocol_version < 23) { |
460 | if (protocol_version == 22 || (protocol_version > 17 && am_sender)) | |
68f40ebb | 461 | io_start_multiplex_out(f_out); |
554e0a8d | 462 | } |
15b7b73d | 463 | |
4a7144ee WD |
464 | /* For later protocol versions, we don't start multiplexing |
465 | * until we've configured nonblocking in start_server. That | |
466 | * means we're in a sticky situation now: there's no way to | |
467 | * convey errors to the client. */ | |
468 | ||
469 | /* FIXME: Hold off on reporting option processing errors until | |
470 | * we've set up nonblocking and multiplexed IO and can get the | |
471 | * message back to them. */ | |
41979ff8 | 472 | if (!ret) { |
4a7144ee WD |
473 | option_error(); |
474 | exit_cleanup(RERR_UNSUPPORTED); | |
41979ff8 AT |
475 | } |
476 | ||
81791cfc AT |
477 | if (lp_timeout(i)) { |
478 | extern int io_timeout; | |
479 | io_timeout = lp_timeout(i); | |
480 | } | |
481 | ||
68f40ebb | 482 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
7a6421fa AT |
487 | /* send a list of available modules to the client. Don't list those |
488 | with "list = False". */ | |
3591c066 AT |
489 | static void send_listing(int fd) |
490 | { | |
491 | int n = lp_numservices(); | |
492 | int i; | |
063393d6 | 493 | |
3591c066 AT |
494 | for (i=0;i<n;i++) |
495 | if (lp_list(i)) | |
4a7144ee | 496 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
8f04bb36 | 497 | |
daa598df | 498 | if (protocol_version >= 25) |
063393d6 | 499 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
500 | } |
501 | ||
68f40ebb | 502 | /* this is called when a connection is established to a client |
3591c066 AT |
503 | and we want to start talking. The setup of the system is done from |
504 | here */ | |
68f40ebb | 505 | int start_daemon(int f_in, int f_out) |
3591c066 | 506 | { |
7a6421fa | 507 | char line[200]; |
3591c066 | 508 | char *motd; |
8ef4ffd6 | 509 | int i = -1; |
4cdf25e4 | 510 | extern char *config_file; |
68f40ebb | 511 | extern int am_server; |
4cdf25e4 | 512 | |
f9e940ef | 513 | if (!lp_load(config_file, 0)) { |
65417579 | 514 | exit_cleanup(RERR_SYNTAX); |
4cdf25e4 | 515 | } |
3591c066 | 516 | |
30e8c8e1 DD |
517 | log_init(); |
518 | ||
68f40ebb WD |
519 | if (!am_server) { |
520 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
521 | set_socket_options(f_in, lp_socket_options()); | |
522 | set_nonblocking(f_in); | |
523 | } | |
3591c066 | 524 | |
68f40ebb | 525 | io_printf(f_out, "@RSYNCD: %d\n", PROTOCOL_VERSION); |
3591c066 AT |
526 | |
527 | motd = lp_motd_file(); | |
27d3cdbc | 528 | if (motd && *motd) { |
0090cbdb | 529 | FILE *f = fopen(motd,"r"); |
3591c066 AT |
530 | while (f && !feof(f)) { |
531 | int len = fread(line, 1, sizeof(line)-1, f); | |
532 | if (len > 0) { | |
533 | line[len] = 0; | |
68f40ebb | 534 | io_printf(f_out, "%s", line); |
3591c066 AT |
535 | } |
536 | } | |
537 | if (f) fclose(f); | |
68f40ebb | 538 | io_printf(f_out, "\n"); |
3591c066 AT |
539 | } |
540 | ||
68f40ebb | 541 | if (!read_line(f_in, line, sizeof(line)-1)) { |
91eee594 AT |
542 | return -1; |
543 | } | |
544 | ||
daa598df | 545 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 546 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 547 | return -1; |
4a7144ee | 548 | } |
daa598df WD |
549 | if (protocol_version > remote_protocol) |
550 | protocol_version = remote_protocol; | |
91eee594 | 551 | |
8ef4ffd6 | 552 | while (i == -1) { |
3591c066 | 553 | line[0] = 0; |
68f40ebb | 554 | if (!read_line(f_in, line, sizeof(line)-1)) { |
3591c066 AT |
555 | return -1; |
556 | } | |
557 | ||
558 | if (!*line || strcmp(line,"#list")==0) { | |
68f40ebb | 559 | send_listing(f_out); |
3591c066 | 560 | return -1; |
4a7144ee | 561 | } |
3591c066 AT |
562 | |
563 | if (*line == '#') { | |
564 | /* it's some sort of command that I don't understand */ | |
68f40ebb | 565 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
3591c066 AT |
566 | return -1; |
567 | } | |
568 | ||
569 | i = lp_number(line); | |
570 | if (i == -1) { | |
68f40ebb | 571 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
3591c066 AT |
572 | return -1; |
573 | } | |
3591c066 AT |
574 | } |
575 | ||
68f40ebb | 576 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
577 | } |
578 | ||
579 | ||
580 | int daemon_main(void) | |
581 | { | |
f9e940ef | 582 | extern char *config_file; |
ad517ce5 | 583 | extern int orig_umask; |
8638dd48 | 584 | char *pid_file; |
13e29995 | 585 | extern int no_detach; |
1a016bfd | 586 | |
3591c066 | 587 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
588 | int i; |
589 | ||
590 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
591 | * stderr so that library functions (and getopt) don't |
592 | * try to use them. Redirect them to /dev/null */ | |
41979ff8 | 593 | for (i=1;i<3;i++) { |
4a7144ee | 594 | close(i); |
41979ff8 AT |
595 | open("/dev/null", O_RDWR); |
596 | } | |
3eb38818 | 597 | |
68f40ebb | 598 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
599 | } |
600 | ||
13e29995 | 601 | if (!no_detach) |
4a7144ee | 602 | become_daemon(); |
3591c066 | 603 | |
f9e940ef | 604 | if (!lp_load(config_file, 1)) { |
65417579 | 605 | exit_cleanup(RERR_SYNTAX); |
f9e940ef AT |
606 | } |
607 | ||
45a83540 | 608 | log_init(); |
f9e940ef | 609 | |
a358449a | 610 | rprintf(FINFO, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
611 | RSYNC_VERSION, rsync_port); |
612 | /* TODO: If listening on a particular address, then show that | |
613 | * address too. In fact, why not just do inet_ntop on the | |
614 | * local address??? */ | |
e42c9458 | 615 | |
8638dd48 | 616 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
617 | char pidbuf[16]; |
618 | int fd; | |
8638dd48 DD |
619 | int pid = (int) getpid(); |
620 | cleanup_set_pid(pid); | |
ad517ce5 DD |
621 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
622 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
623 | cleanup_set_pid(0); |
624 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
625 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 626 | } |
8950ac03 | 627 | snprintf(pidbuf, sizeof(pidbuf), "%d\n", pid); |
ad517ce5 DD |
628 | write(fd, pidbuf, strlen(pidbuf)); |
629 | close(fd); | |
8638dd48 DD |
630 | } |
631 | ||
8ef4ffd6 AT |
632 | start_accept_loop(rsync_port, start_daemon); |
633 | return -1; | |
3591c066 | 634 | } |