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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 | 34 | extern int module_id; |
3591c066 AT |
35 | extern int verbose; |
36 | extern int rsync_port; | |
6e195fe9 WD |
37 | extern int kludge_around_eof; |
38 | extern int daemon_over_rsh; | |
39 | extern int list_only; | |
b35d0d8e | 40 | extern int sanitize_paths; |
7c2a9e76 | 41 | extern int filesfrom_fd; |
daa598df WD |
42 | extern int remote_protocol; |
43 | extern int protocol_version; | |
6e195fe9 | 44 | extern int io_timeout; |
ad54dcc8 | 45 | extern int select_timeout; |
6e195fe9 WD |
46 | extern int orig_umask; |
47 | extern int no_detach; | |
48 | extern int default_af_hint; | |
49 | extern char *bind_address; | |
7842418b | 50 | extern struct filter_list_struct server_filter_list; |
6e195fe9 | 51 | extern char *config_file; |
bf4679e8 | 52 | extern char *files_from; |
6e195fe9 WD |
53 | |
54 | char *auth_user; | |
18638730 | 55 | int read_only = 0; |
3591c066 | 56 | |
e7bf7c01 WD |
57 | /* Length of lp_path() string when in daemon mode & not chrooted, else 0. */ |
58 | unsigned int module_dirlen = 0; | |
59 | ||
be2961da | 60 | /** |
bc363ea9 | 61 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
62 | * function for remote-shell connections is do_cmd(). |
63 | * | |
fdf88d75 MP |
64 | * After negotiating which module to use and reading the server's |
65 | * motd, this hands over to client_run(). Telling the server the | |
66 | * module will cause it to chroot/setuid/etc. | |
67 | * | |
68 | * Instead of doing a transfer, the client may at this stage instead | |
69 | * get a listing of remote modules and exit. | |
be2961da MP |
70 | * |
71 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 72 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 73 | **/ |
3591c066 AT |
74 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
75 | { | |
68f40ebb | 76 | int fd, ret; |
2e94e70e | 77 | char *p, *user = NULL; |
4a7144ee | 78 | |
1732b6c0 WD |
79 | /* This is redundant with code in start_inband_exchange(), but this |
80 | * short-circuits a problem in the client before we open a socket, | |
81 | * and the extra check won't hurt. */ | |
f98df1d9 | 82 | if (*path == '/') { |
1732b6c0 WD |
83 | rprintf(FERROR, |
84 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
85 | return -1; |
86 | } | |
87 | ||
1732b6c0 | 88 | if ((p = strchr(host, '@')) != NULL) { |
bcb7e502 AT |
89 | user = host; |
90 | host = p+1; | |
1732b6c0 | 91 | *p = '\0'; |
bcb7e502 AT |
92 | } |
93 | ||
3add5835 WD |
94 | if (rsync_port == 0) |
95 | rsync_port = RSYNC_PORT; | |
96 | ||
837cbad9 WD |
97 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
98 | default_af_hint); | |
df5cd107 | 99 | if (fd == -1) |
65417579 | 100 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
101 | |
102 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
103 | ||
104 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); | |
105 | } | |
106 | ||
b9f592fb WD |
107 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
108 | int argc) | |
68f40ebb WD |
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) | |
9bcb2595 | 117 | list_only |= 1; |
68f40ebb WD |
118 | |
119 | if (*path == '/') { | |
1732b6c0 WD |
120 | rprintf(FERROR, |
121 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
122 | return -1; |
123 | } | |
124 | ||
2e94e70e WD |
125 | if (!user) |
126 | user = getenv("USER"); | |
127 | if (!user) | |
128 | user = getenv("LOGNAME"); | |
68f40ebb | 129 | |
5a8543b8 | 130 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 131 | |
2e94e70e | 132 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 133 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
134 | return -1; |
135 | } | |
136 | ||
daa598df | 137 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
138 | /* note that read_line strips of \n or \r */ |
139 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
140 | line); | |
3591c066 AT |
141 | return -1; |
142 | } | |
daa598df WD |
143 | if (protocol_version > remote_protocol) |
144 | protocol_version = remote_protocol; | |
3591c066 | 145 | |
9bcb2595 WD |
146 | if (list_only && protocol_version >= 29) |
147 | list_only |= 2; | |
148 | ||
149 | /* set daemon_over_rsh to false since we need to build the | |
150 | * true set of args passed through the rsh/ssh connection; | |
151 | * this is a no-op for direct-socket-connection mode */ | |
152 | daemon_over_rsh = 0; | |
153 | server_options(sargs, &sargc); | |
154 | ||
155 | sargs[sargc++] = "."; | |
156 | ||
157 | if (path && *path) | |
158 | sargs[sargc++] = path; | |
159 | ||
160 | sargs[sargc] = NULL; | |
161 | ||
162 | if (verbose > 1) | |
163 | print_child_argv(sargs); | |
164 | ||
2c91d3d3 AT |
165 | p = strchr(path,'/'); |
166 | if (p) *p = 0; | |
68f40ebb | 167 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
168 | if (p) *p = '/'; |
169 | ||
063393d6 MP |
170 | /* Old servers may just drop the connection here, |
171 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 172 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 173 | |
063393d6 | 174 | while (1) { |
2e94e70e | 175 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 176 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
177 | return -1; |
178 | } | |
31593dd6 | 179 | |
31593dd6 | 180 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 181 | auth_client(f_out, user, line+18); |
31593dd6 AT |
182 | continue; |
183 | } | |
31593dd6 | 184 | |
2e94e70e WD |
185 | if (strcmp(line,"@RSYNCD: OK") == 0) |
186 | break; | |
8f04bb36 | 187 | |
cae95647 MP |
188 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
189 | /* This is sent by recent versions of the | |
190 | * server to terminate the listing of modules. | |
191 | * We don't want to go on and transfer | |
192 | * anything; just exit. */ | |
193 | exit(0); | |
194 | } | |
8f04bb36 | 195 | |
136ac7ec | 196 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 197 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
198 | /* This is always fatal; the server will now |
199 | * close the socket. */ | |
200 | return RERR_STARTCLIENT; | |
201 | } else { | |
c613d370 | 202 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 203 | } |
3591c066 | 204 | } |
7a55d06e | 205 | kludge_around_eof = False; |
3591c066 | 206 | |
68f40ebb WD |
207 | for (i = 0; i < sargc; i++) { |
208 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 209 | } |
68f40ebb | 210 | io_printf(f_out, "\n"); |
3591c066 | 211 | |
daa598df | 212 | if (protocol_version < 23) { |
3f55bd5d | 213 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 214 | io_start_multiplex_in(); |
09b7f5db | 215 | } |
8d9dc9f9 | 216 | |
68f40ebb | 217 | return 0; |
3591c066 AT |
218 | } |
219 | ||
220 | ||
221 | ||
68f40ebb | 222 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 223 | { |
2e94e70e | 224 | int argc = 0; |
b7061c82 WD |
225 | int maxargs; |
226 | char **argv; | |
3591c066 | 227 | char **argp; |
e42c9458 | 228 | char line[MAXPATHLEN]; |
2af27ad9 | 229 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 230 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 231 | char *p; |
09021eab DD |
232 | char *addr = client_addr(f_in); |
233 | char *host = client_name(f_in); | |
874895d5 | 234 | char *name = lp_name(i); |
8638dd48 | 235 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 236 | int start_glob = 0; |
41979ff8 | 237 | int ret; |
2e94e70e | 238 | char *request = NULL; |
56c473b7 AT |
239 | |
240 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 241 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 242 | name, host, addr); |
c0422cea WD |
243 | if (!lp_list(i)) |
244 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
245 | else { | |
246 | io_printf(f_out, | |
247 | "@ERROR: access denied to %s from %s (%s)\n", | |
248 | name, host, addr); | |
249 | } | |
56c473b7 AT |
250 | return -1; |
251 | } | |
3591c066 | 252 | |
68f40ebb | 253 | if (am_daemon && am_server) { |
9e5a5ddb | 254 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
255 | name, host, addr); |
256 | } | |
257 | ||
5e71c444 | 258 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 259 | if (errno) { |
1732b6c0 | 260 | rsyserr(FLOG, errno, "failed to open lock file %s", |
d62bcc17 WD |
261 | lp_lock_file(i)); |
262 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
263 | lp_lock_file(i)); | |
8d72ef6e | 264 | } else { |
1732b6c0 | 265 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 266 | lp_max_connections(i)); |
837cbad9 WD |
267 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
268 | lp_max_connections(i)); | |
8d72ef6e | 269 | } |
0c515f17 AT |
270 | return -1; |
271 | } | |
272 | ||
68f40ebb | 273 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 274 | |
97cb8dc2 | 275 | if (!auth_user) { |
1732b6c0 | 276 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
68f40ebb WD |
277 | name, host, addr); |
278 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); | |
4a7144ee | 279 | return -1; |
d0d56395 AT |
280 | } |
281 | ||
3591c066 AT |
282 | module_id = i; |
283 | ||
18638730 WD |
284 | if (lp_read_only(module_id)) |
285 | read_only = 1; | |
286 | ||
6fe05820 | 287 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 288 | |
716baed7 DD |
289 | if (am_root) { |
290 | p = lp_uid(i); | |
291 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 292 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 293 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 294 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 295 | return -1; |
4a7144ee | 296 | } |
716baed7 DD |
297 | uid = atoi(p); |
298 | } | |
299 | ||
300 | p = lp_gid(i); | |
301 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 302 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 303 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 304 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 305 | return -1; |
4a7144ee | 306 | } |
716baed7 DD |
307 | gid = atoi(p); |
308 | } | |
8ef4ffd6 | 309 | } |
3b2b5345 | 310 | |
4a7144ee WD |
311 | /* TODO: If we're not root, but the configuration requests |
312 | * that we change to some uid other than the current one, then | |
313 | * log a warning. */ | |
314 | ||
315 | /* TODO: Perhaps take a list of gids, and make them into the | |
316 | * supplementary groups. */ | |
8ef4ffd6 | 317 | |
e7bf7c01 WD |
318 | if (use_chroot) { |
319 | module_dirlen = 0; | |
7842418b | 320 | set_filter_dir("/", 1); |
e7bf7c01 WD |
321 | } else { |
322 | module_dirlen = strlen(lp_path(i)); | |
7842418b | 323 | set_filter_dir(lp_path(i), module_dirlen); |
e7bf7c01 WD |
324 | } |
325 | ||
326 | p = lp_filter(i); | |
7842418b WD |
327 | add_filter(&server_filter_list, p, |
328 | XFLG_WORD_SPLIT | XFLG_ABS_PATH); | |
837cbad9 | 329 | |
cd64343a | 330 | p = lp_include_from(i); |
7842418b WD |
331 | add_filter_file(&server_filter_list, p, |
332 | XFLG_FATAL_ERRORS | XFLG_ABS_PATH | XFLG_DEF_INCLUDE); | |
cd64343a DD |
333 | |
334 | p = lp_include(i); | |
7842418b WD |
335 | add_filter(&server_filter_list, p, |
336 | XFLG_WORD_SPLIT | XFLG_ABS_PATH | XFLG_DEF_INCLUDE); | |
cd64343a | 337 | |
8f3a2d54 | 338 | p = lp_exclude_from(i); |
7842418b WD |
339 | add_filter_file(&server_filter_list, p, |
340 | XFLG_FATAL_ERRORS | XFLG_ABS_PATH | XFLG_DEF_EXCLUDE); | |
8f3a2d54 | 341 | |
5805327b | 342 | p = lp_exclude(i); |
7842418b WD |
343 | add_filter(&server_filter_list, p, |
344 | XFLG_WORD_SPLIT | XFLG_ABS_PATH | XFLG_DEF_EXCLUDE); | |
8f3a2d54 | 345 | |
45a83540 | 346 | log_init(); |
1a016bfd | 347 | |
8638dd48 | 348 | if (use_chroot) { |
b52c1d9d MP |
349 | /* |
350 | * XXX: The 'use chroot' flag is a fairly reliable | |
351 | * source of confusion, because it fails under two | |
352 | * important circumstances: running as non-root, | |
353 | * running on Win32 (or possibly others). On the | |
354 | * other hand, if you are running as root, then it | |
355 | * might be better to always use chroot. | |
356 | * | |
357 | * So, perhaps if we can't chroot we should just issue | |
358 | * a warning, unless a "require chroot" flag is set, | |
359 | * in which case we fail. | |
360 | */ | |
8638dd48 | 361 | if (chroot(lp_path(i))) { |
1732b6c0 | 362 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 363 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
364 | return -1; |
365 | } | |
3591c066 | 366 | |
59187666 | 367 | if (!push_dir("/")) { |
1732b6c0 | 368 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 369 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
370 | return -1; |
371 | } | |
3591c066 | 372 | |
716baed7 | 373 | } else { |
59187666 | 374 | if (!push_dir(lp_path(i))) { |
1732b6c0 | 375 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 376 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
377 | return -1; |
378 | } | |
cb13abfe | 379 | sanitize_paths = 1; |
716baed7 DD |
380 | } |
381 | ||
382 | if (am_root) { | |
715d1f45 MP |
383 | /* XXXX: You could argue that if the daemon is started |
384 | * by a non-root user and they explicitly specify a | |
385 | * gid, then we should try to change to that gid -- | |
386 | * this could be possible if it's already in their | |
387 | * supplementary groups. */ | |
388 | ||
389 | /* TODO: Perhaps we need to document that if rsyncd is | |
390 | * started by somebody other than root it will inherit | |
391 | * all their supplementary groups. */ | |
392 | ||
716baed7 | 393 | if (setgid(gid)) { |
1732b6c0 | 394 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 395 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
396 | return -1; |
397 | } | |
25ff0441 | 398 | #if HAVE_SETGROUPS |
6969ebcf WD |
399 | /* Get rid of any supplementary groups this process |
400 | * might have inheristed. */ | |
401 | if (setgroups(1, &gid)) { | |
1732b6c0 | 402 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
403 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
404 | return -1; | |
405 | } | |
406 | #endif | |
3591c066 | 407 | |
716baed7 | 408 | if (setuid(uid)) { |
1732b6c0 | 409 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 410 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
411 | return -1; |
412 | } | |
413 | ||
6fe05820 | 414 | am_root = (MY_UID() == 0); |
3591c066 AT |
415 | } |
416 | ||
68f40ebb | 417 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 418 | |
b7061c82 WD |
419 | maxargs = MAX_ARGS; |
420 | if (!(argv = new_array(char *, maxargs))) | |
421 | out_of_memory("rsync_module"); | |
3591c066 AT |
422 | argv[argc++] = "rsyncd"; |
423 | ||
424 | while (1) { | |
2e94e70e | 425 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 426 | return -1; |
3591c066 | 427 | |
2e94e70e WD |
428 | if (!*line) |
429 | break; | |
3591c066 | 430 | |
874895d5 AT |
431 | p = line; |
432 | ||
b7061c82 WD |
433 | if (argc == maxargs) { |
434 | maxargs += MAX_ARGS; | |
435 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
436 | out_of_memory("rsync_module"); | |
437 | } | |
2e94e70e | 438 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 439 | out_of_memory("rsync_module"); |
3591c066 | 440 | |
874895d5 | 441 | if (start_glob) { |
1a016bfd | 442 | if (start_glob == 1) { |
7b372642 | 443 | request = strdup(p); |
1a016bfd AT |
444 | start_glob++; |
445 | } | |
b7061c82 | 446 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 447 | } else |
874895d5 | 448 | argc++; |
874895d5 | 449 | |
2e94e70e | 450 | if (strcmp(line, ".") == 0) |
874895d5 | 451 | start_glob = 1; |
3591c066 AT |
452 | } |
453 | ||
18638730 | 454 | verbose = 0; /* future verbosity is controlled by client options */ |
4a7144ee | 455 | argp = argv; |
15b7b73d | 456 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 457 | |
7c2a9e76 WD |
458 | if (filesfrom_fd == 0) |
459 | filesfrom_fd = f_in; | |
460 | ||
7b372642 | 461 | if (request) { |
97cb8dc2 | 462 | if (*auth_user) { |
9e5a5ddb WD |
463 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
464 | am_sender ? "on" : "to", | |
97cb8dc2 | 465 | request, auth_user, host, addr); |
d0d56395 | 466 | } else { |
9e5a5ddb WD |
467 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
468 | am_sender ? "on" : "to", | |
d0d56395 AT |
469 | request, host, addr); |
470 | } | |
7b372642 AT |
471 | free(request); |
472 | } | |
473 | ||
15b7b73d | 474 | #ifndef DEBUG |
3591c066 | 475 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
476 | if (verbose > lp_max_verbosity()) |
477 | verbose = lp_max_verbosity(); | |
0199b05f | 478 | #endif |
3591c066 | 479 | |
1732b6c0 WD |
480 | if (protocol_version < 23 |
481 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 482 | io_start_multiplex_out(); |
1732b6c0 WD |
483 | else if (!ret) { |
484 | /* We have to get I/O multiplexing started so that we can | |
485 | * get the error back to the client. This means getting | |
486 | * the protocol setup finished first in later versions. */ | |
487 | setup_protocol(f_out, f_in); | |
bf4679e8 WD |
488 | if (files_from && !am_sender && strcmp(files_from, "-") != 0) |
489 | write_byte(f_out, 0); | |
da3478b2 | 490 | io_start_multiplex_out(); |
554e0a8d | 491 | } |
15b7b73d | 492 | |
41979ff8 | 493 | if (!ret) { |
4a7144ee | 494 | option_error(); |
7e561438 | 495 | msleep(400); |
4a7144ee | 496 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
497 | } |
498 | ||
ad54dcc8 | 499 | if (lp_timeout(i)) { |
81791cfc | 500 | io_timeout = lp_timeout(i); |
43bab403 | 501 | if (io_timeout < select_timeout) |
ad54dcc8 WD |
502 | select_timeout = io_timeout; |
503 | } | |
81791cfc | 504 | |
68f40ebb | 505 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
506 | |
507 | return 0; | |
508 | } | |
509 | ||
7a6421fa AT |
510 | /* send a list of available modules to the client. Don't list those |
511 | with "list = False". */ | |
3591c066 AT |
512 | static void send_listing(int fd) |
513 | { | |
514 | int n = lp_numservices(); | |
515 | int i; | |
063393d6 | 516 | |
c0422cea | 517 | for (i = 0; i < n; i++) { |
3591c066 | 518 | if (lp_list(i)) |
4a7144ee | 519 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 520 | } |
8f04bb36 | 521 | |
daa598df | 522 | if (protocol_version >= 25) |
063393d6 | 523 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
524 | } |
525 | ||
68f40ebb | 526 | /* this is called when a connection is established to a client |
3591c066 AT |
527 | and we want to start talking. The setup of the system is done from |
528 | here */ | |
68f40ebb | 529 | int start_daemon(int f_in, int f_out) |
3591c066 | 530 | { |
7a6421fa | 531 | char line[200]; |
3591c066 | 532 | char *motd; |
c0422cea | 533 | int i; |
4cdf25e4 | 534 | |
da3478b2 WD |
535 | io_set_sock_fds(f_in, f_out); |
536 | ||
2e94e70e | 537 | if (!lp_load(config_file, 0)) |
65417579 | 538 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 539 | |
30e8c8e1 DD |
540 | log_init(); |
541 | ||
68f40ebb WD |
542 | if (!am_server) { |
543 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
544 | set_socket_options(f_in, lp_socket_options()); | |
545 | set_nonblocking(f_in); | |
546 | } | |
3591c066 | 547 | |
5a8543b8 | 548 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
549 | |
550 | motd = lp_motd_file(); | |
27d3cdbc | 551 | if (motd && *motd) { |
0090cbdb | 552 | FILE *f = fopen(motd,"r"); |
3591c066 | 553 | while (f && !feof(f)) { |
2e94e70e | 554 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
555 | if (len > 0) { |
556 | line[len] = 0; | |
68f40ebb | 557 | io_printf(f_out, "%s", line); |
3591c066 AT |
558 | } |
559 | } | |
2e94e70e WD |
560 | if (f) |
561 | fclose(f); | |
68f40ebb | 562 | io_printf(f_out, "\n"); |
3591c066 AT |
563 | } |
564 | ||
2e94e70e | 565 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 566 | return -1; |
91eee594 | 567 | |
daa598df | 568 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 569 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 570 | return -1; |
4a7144ee | 571 | } |
daa598df WD |
572 | if (protocol_version > remote_protocol) |
573 | protocol_version = remote_protocol; | |
91eee594 | 574 | |
c0422cea WD |
575 | line[0] = 0; |
576 | if (!read_line(f_in, line, sizeof line - 1)) | |
577 | return -1; | |
3591c066 | 578 | |
c0422cea WD |
579 | if (!*line || strcmp(line, "#list") == 0) { |
580 | send_listing(f_out); | |
581 | return -1; | |
582 | } | |
3591c066 | 583 | |
c0422cea WD |
584 | if (*line == '#') { |
585 | /* it's some sort of command that I don't understand */ | |
586 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
587 | return -1; | |
588 | } | |
3591c066 | 589 | |
c0422cea WD |
590 | if ((i = lp_number(line)) < 0) { |
591 | char *addr = client_addr(f_in); | |
592 | char *host = client_name(f_in); | |
593 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
594 | line, host, addr); | |
595 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
596 | return -1; | |
3591c066 AT |
597 | } |
598 | ||
68f40ebb | 599 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
600 | } |
601 | ||
602 | ||
603 | int daemon_main(void) | |
604 | { | |
8638dd48 | 605 | char *pid_file; |
1a016bfd | 606 | |
3591c066 | 607 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
608 | int i; |
609 | ||
610 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
611 | * stderr so that library functions (and getopt) don't |
612 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 613 | for (i = 1; i < 3; i++) { |
4a7144ee | 614 | close(i); |
41979ff8 AT |
615 | open("/dev/null", O_RDWR); |
616 | } | |
3eb38818 | 617 | |
68f40ebb | 618 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
619 | } |
620 | ||
13e29995 | 621 | if (!no_detach) |
4a7144ee | 622 | become_daemon(); |
3591c066 | 623 | |
2e94e70e | 624 | if (!lp_load(config_file, 1)) |
65417579 | 625 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 626 | |
0c56b1ad WD |
627 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
628 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 629 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 630 | bind_address = lp_bind_address(); |
0c56b1ad | 631 | |
45a83540 | 632 | log_init(); |
f9e940ef | 633 | |
9e5a5ddb | 634 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
635 | RSYNC_VERSION, rsync_port); |
636 | /* TODO: If listening on a particular address, then show that | |
637 | * address too. In fact, why not just do inet_ntop on the | |
638 | * local address??? */ | |
e42c9458 | 639 | |
8638dd48 | 640 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
641 | char pidbuf[16]; |
642 | int fd; | |
05b7bab8 | 643 | pid_t pid = getpid(); |
8638dd48 | 644 | cleanup_set_pid(pid); |
ad517ce5 DD |
645 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
646 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
647 | cleanup_set_pid(0); |
648 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
649 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 650 | } |
05b7bab8 | 651 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
652 | write(fd, pidbuf, strlen(pidbuf)); |
653 | close(fd); | |
8638dd48 DD |
654 | } |
655 | ||
8ef4ffd6 AT |
656 | start_accept_loop(rsync_port, start_daemon); |
657 | return -1; | |
3591c066 | 658 | } |