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 | ||
100 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, int argc) | |
101 | { | |
102 | int i; | |
103 | char *sargs[MAX_ARGS]; | |
104 | int sargc = 0; | |
105 | char line[MAXPATHLEN]; | |
106 | char *p; | |
68f40ebb WD |
107 | |
108 | if (argc == 0 && !am_sender) | |
109 | list_only = 1; | |
110 | ||
111 | if (*path == '/') { | |
1732b6c0 WD |
112 | rprintf(FERROR, |
113 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
114 | return -1; |
115 | } | |
116 | ||
2e94e70e WD |
117 | if (!user) |
118 | user = getenv("USER"); | |
119 | if (!user) | |
120 | user = getenv("LOGNAME"); | |
68f40ebb | 121 | |
4a7144ee WD |
122 | /* set daemon_over_rsh to false since we need to build the |
123 | * true set of args passed through the rsh/ssh connection; | |
124 | * this is a no-op for direct-socket-connection mode */ | |
68f40ebb WD |
125 | daemon_over_rsh = 0; |
126 | server_options(sargs, &sargc); | |
3591c066 AT |
127 | |
128 | sargs[sargc++] = "."; | |
129 | ||
4a7144ee | 130 | if (path && *path) |
3591c066 AT |
131 | sargs[sargc++] = path; |
132 | ||
133 | sargs[sargc] = NULL; | |
134 | ||
5a8543b8 | 135 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 136 | |
2e94e70e | 137 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 138 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
139 | return -1; |
140 | } | |
141 | ||
daa598df | 142 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
143 | /* note that read_line strips of \n or \r */ |
144 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
145 | line); | |
3591c066 AT |
146 | return -1; |
147 | } | |
daa598df WD |
148 | if (protocol_version > remote_protocol) |
149 | protocol_version = remote_protocol; | |
3591c066 | 150 | |
2c91d3d3 AT |
151 | p = strchr(path,'/'); |
152 | if (p) *p = 0; | |
68f40ebb | 153 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
154 | if (p) *p = '/'; |
155 | ||
063393d6 MP |
156 | /* Old servers may just drop the connection here, |
157 | rather than sending a proper EXIT command. Yuck. */ | |
daa598df | 158 | kludge_around_eof = list_only && (protocol_version < 25); |
7a55d06e | 159 | |
063393d6 | 160 | while (1) { |
2e94e70e | 161 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 162 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
163 | return -1; |
164 | } | |
31593dd6 | 165 | |
31593dd6 | 166 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 167 | auth_client(f_out, user, line+18); |
31593dd6 AT |
168 | continue; |
169 | } | |
31593dd6 | 170 | |
2e94e70e WD |
171 | if (strcmp(line,"@RSYNCD: OK") == 0) |
172 | break; | |
8f04bb36 | 173 | |
cae95647 MP |
174 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
175 | /* This is sent by recent versions of the | |
176 | * server to terminate the listing of modules. | |
177 | * We don't want to go on and transfer | |
178 | * anything; just exit. */ | |
179 | exit(0); | |
180 | } | |
8f04bb36 | 181 | |
136ac7ec | 182 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 183 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
184 | /* This is always fatal; the server will now |
185 | * close the socket. */ | |
186 | return RERR_STARTCLIENT; | |
187 | } else { | |
c613d370 | 188 | rprintf(FINFO,"%s\n", line); |
136ac7ec | 189 | } |
3591c066 | 190 | } |
7a55d06e | 191 | kludge_around_eof = False; |
3591c066 | 192 | |
68f40ebb WD |
193 | for (i = 0; i < sargc; i++) { |
194 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 195 | } |
68f40ebb | 196 | io_printf(f_out, "\n"); |
3591c066 | 197 | |
daa598df | 198 | if (protocol_version < 23) { |
3f55bd5d | 199 | if (protocol_version == 22 || !am_sender) |
68f40ebb | 200 | io_start_multiplex_in(f_in); |
09b7f5db | 201 | } |
8d9dc9f9 | 202 | |
68f40ebb | 203 | return 0; |
3591c066 AT |
204 | } |
205 | ||
206 | ||
207 | ||
68f40ebb | 208 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 209 | { |
2e94e70e | 210 | int argc = 0; |
b7061c82 WD |
211 | int maxargs; |
212 | char **argv; | |
3591c066 | 213 | char **argp; |
e42c9458 | 214 | char line[MAXPATHLEN]; |
2af27ad9 | 215 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 216 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 217 | char *p; |
09021eab DD |
218 | char *addr = client_addr(f_in); |
219 | char *host = client_name(f_in); | |
874895d5 | 220 | char *name = lp_name(i); |
8638dd48 | 221 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 222 | int start_glob = 0; |
41979ff8 | 223 | int ret; |
2e94e70e | 224 | char *request = NULL; |
56c473b7 AT |
225 | |
226 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 227 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 228 | name, host, addr); |
68f40ebb | 229 | io_printf(f_out, "@ERROR: access denied to %s from %s (%s)\n", |
31ec50d7 | 230 | name, host, addr); |
56c473b7 AT |
231 | return -1; |
232 | } | |
3591c066 | 233 | |
68f40ebb | 234 | if (am_daemon && am_server) { |
9e5a5ddb | 235 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
236 | name, host, addr); |
237 | } | |
238 | ||
5e71c444 | 239 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 240 | if (errno) { |
1732b6c0 | 241 | rsyserr(FLOG, errno, "failed to open lock file %s", |
d62bcc17 WD |
242 | lp_lock_file(i)); |
243 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", | |
244 | lp_lock_file(i)); | |
8d72ef6e | 245 | } else { |
1732b6c0 | 246 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 247 | lp_max_connections(i)); |
837cbad9 WD |
248 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
249 | lp_max_connections(i)); | |
8d72ef6e | 250 | } |
0c515f17 AT |
251 | return -1; |
252 | } | |
253 | ||
68f40ebb | 254 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 255 | |
97cb8dc2 | 256 | if (!auth_user) { |
1732b6c0 | 257 | rprintf(FLOG, "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 | ||
6fe05820 | 265 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 266 | |
716baed7 DD |
267 | if (am_root) { |
268 | p = lp_uid(i); | |
269 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 270 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 271 | rprintf(FLOG, "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)) { | |
2e94e70e | 280 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 281 | rprintf(FLOG, "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); |
357406ec WD |
301 | add_exclude_file(&server_exclude_list, p, |
302 | XFLG_FATAL_ERRORS | XFLG_DEF_INCLUDE); | |
cd64343a DD |
303 | |
304 | p = lp_include(i); | |
357406ec WD |
305 | add_exclude(&server_exclude_list, p, |
306 | XFLG_WORD_SPLIT | XFLG_DEF_INCLUDE); | |
cd64343a | 307 | |
8f3a2d54 | 308 | p = lp_exclude_from(i); |
357406ec WD |
309 | add_exclude_file(&server_exclude_list, p, |
310 | XFLG_FATAL_ERRORS); | |
8f3a2d54 | 311 | |
5805327b | 312 | p = lp_exclude(i); |
357406ec | 313 | add_exclude(&server_exclude_list, p, XFLG_WORD_SPLIT); |
837cbad9 WD |
314 | |
315 | exclude_path_prefix = NULL; | |
8f3a2d54 | 316 | |
45a83540 | 317 | log_init(); |
1a016bfd | 318 | |
8638dd48 | 319 | if (use_chroot) { |
b52c1d9d MP |
320 | /* |
321 | * XXX: The 'use chroot' flag is a fairly reliable | |
322 | * source of confusion, because it fails under two | |
323 | * important circumstances: running as non-root, | |
324 | * running on Win32 (or possibly others). On the | |
325 | * other hand, if you are running as root, then it | |
326 | * might be better to always use chroot. | |
327 | * | |
328 | * So, perhaps if we can't chroot we should just issue | |
329 | * a warning, unless a "require chroot" flag is set, | |
330 | * in which case we fail. | |
331 | */ | |
8638dd48 | 332 | if (chroot(lp_path(i))) { |
1732b6c0 | 333 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
68f40ebb | 334 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
335 | return -1; |
336 | } | |
3591c066 | 337 | |
59187666 | 338 | if (!push_dir("/")) { |
1732b6c0 | 339 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 340 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
341 | return -1; |
342 | } | |
3591c066 | 343 | |
716baed7 | 344 | } else { |
59187666 | 345 | if (!push_dir(lp_path(i))) { |
1732b6c0 | 346 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
68f40ebb | 347 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
348 | return -1; |
349 | } | |
cb13abfe | 350 | sanitize_paths = 1; |
716baed7 DD |
351 | } |
352 | ||
353 | if (am_root) { | |
715d1f45 MP |
354 | /* XXXX: You could argue that if the daemon is started |
355 | * by a non-root user and they explicitly specify a | |
356 | * gid, then we should try to change to that gid -- | |
357 | * this could be possible if it's already in their | |
358 | * supplementary groups. */ | |
359 | ||
360 | /* TODO: Perhaps we need to document that if rsyncd is | |
361 | * started by somebody other than root it will inherit | |
362 | * all their supplementary groups. */ | |
363 | ||
716baed7 | 364 | if (setgid(gid)) { |
1732b6c0 | 365 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 366 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
367 | return -1; |
368 | } | |
6969ebcf WD |
369 | #ifdef HAVE_SETGROUPS |
370 | /* Get rid of any supplementary groups this process | |
371 | * might have inheristed. */ | |
372 | if (setgroups(1, &gid)) { | |
1732b6c0 | 373 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
374 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
375 | return -1; | |
376 | } | |
377 | #endif | |
3591c066 | 378 | |
716baed7 | 379 | if (setuid(uid)) { |
1732b6c0 | 380 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 381 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
382 | return -1; |
383 | } | |
384 | ||
6fe05820 | 385 | am_root = (MY_UID() == 0); |
3591c066 AT |
386 | } |
387 | ||
68f40ebb | 388 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 389 | |
b7061c82 WD |
390 | maxargs = MAX_ARGS; |
391 | if (!(argv = new_array(char *, maxargs))) | |
392 | out_of_memory("rsync_module"); | |
3591c066 AT |
393 | argv[argc++] = "rsyncd"; |
394 | ||
395 | while (1) { | |
2e94e70e | 396 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 397 | return -1; |
3591c066 | 398 | |
2e94e70e WD |
399 | if (!*line) |
400 | break; | |
3591c066 | 401 | |
874895d5 AT |
402 | p = line; |
403 | ||
b7061c82 WD |
404 | if (argc == maxargs) { |
405 | maxargs += MAX_ARGS; | |
406 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
407 | out_of_memory("rsync_module"); | |
408 | } | |
2e94e70e | 409 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 410 | out_of_memory("rsync_module"); |
3591c066 | 411 | |
874895d5 | 412 | if (start_glob) { |
1a016bfd | 413 | if (start_glob == 1) { |
7b372642 | 414 | request = strdup(p); |
1a016bfd AT |
415 | start_glob++; |
416 | } | |
b7061c82 | 417 | glob_expand(name, &argv, &argc, &maxargs); |
2e94e70e | 418 | } else |
874895d5 | 419 | argc++; |
874895d5 | 420 | |
2e94e70e | 421 | if (strcmp(line, ".") == 0) |
874895d5 | 422 | start_glob = 1; |
3591c066 AT |
423 | } |
424 | ||
4a7144ee | 425 | argp = argv; |
15b7b73d | 426 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
3591c066 | 427 | |
7c2a9e76 WD |
428 | if (filesfrom_fd == 0) |
429 | filesfrom_fd = f_in; | |
430 | ||
7b372642 | 431 | if (request) { |
97cb8dc2 | 432 | if (*auth_user) { |
9e5a5ddb WD |
433 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
434 | am_sender ? "on" : "to", | |
97cb8dc2 | 435 | request, auth_user, host, addr); |
d0d56395 | 436 | } else { |
9e5a5ddb WD |
437 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
438 | am_sender ? "on" : "to", | |
d0d56395 AT |
439 | request, host, addr); |
440 | } | |
7b372642 AT |
441 | free(request); |
442 | } | |
443 | ||
15b7b73d | 444 | #ifndef DEBUG |
3591c066 | 445 | /* don't allow the logs to be flooded too fast */ |
33e9d10d WD |
446 | if (verbose > lp_max_verbosity()) |
447 | verbose = lp_max_verbosity(); | |
0199b05f | 448 | #endif |
3591c066 | 449 | |
1732b6c0 WD |
450 | if (protocol_version < 23 |
451 | && (protocol_version == 22 || am_sender)) | |
452 | io_start_multiplex_out(f_out); | |
453 | else if (!ret) { | |
454 | /* We have to get I/O multiplexing started so that we can | |
455 | * get the error back to the client. This means getting | |
456 | * the protocol setup finished first in later versions. */ | |
457 | setup_protocol(f_out, f_in); | |
458 | io_start_multiplex_out(f_out); | |
554e0a8d | 459 | } |
15b7b73d | 460 | |
41979ff8 | 461 | if (!ret) { |
4a7144ee | 462 | option_error(); |
7e561438 | 463 | msleep(400); |
4a7144ee | 464 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
465 | } |
466 | ||
2e94e70e | 467 | if (lp_timeout(i)) |
81791cfc | 468 | io_timeout = lp_timeout(i); |
81791cfc | 469 | |
68f40ebb | 470 | start_server(f_in, f_out, argc, argp); |
3591c066 AT |
471 | |
472 | return 0; | |
473 | } | |
474 | ||
7a6421fa AT |
475 | /* send a list of available modules to the client. Don't list those |
476 | with "list = False". */ | |
3591c066 AT |
477 | static void send_listing(int fd) |
478 | { | |
479 | int n = lp_numservices(); | |
480 | int i; | |
063393d6 | 481 | |
2e94e70e | 482 | for (i = 0; i < n; i++) |
3591c066 | 483 | if (lp_list(i)) |
4a7144ee | 484 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
8f04bb36 | 485 | |
daa598df | 486 | if (protocol_version >= 25) |
063393d6 | 487 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
488 | } |
489 | ||
68f40ebb | 490 | /* this is called when a connection is established to a client |
3591c066 AT |
491 | and we want to start talking. The setup of the system is done from |
492 | here */ | |
68f40ebb | 493 | int start_daemon(int f_in, int f_out) |
3591c066 | 494 | { |
7a6421fa | 495 | char line[200]; |
3591c066 | 496 | char *motd; |
8ef4ffd6 | 497 | int i = -1; |
4cdf25e4 | 498 | |
2e94e70e | 499 | if (!lp_load(config_file, 0)) |
65417579 | 500 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 501 | |
30e8c8e1 DD |
502 | log_init(); |
503 | ||
68f40ebb WD |
504 | if (!am_server) { |
505 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
506 | set_socket_options(f_in, lp_socket_options()); | |
507 | set_nonblocking(f_in); | |
508 | } | |
3591c066 | 509 | |
5a8543b8 | 510 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
511 | |
512 | motd = lp_motd_file(); | |
27d3cdbc | 513 | if (motd && *motd) { |
0090cbdb | 514 | FILE *f = fopen(motd,"r"); |
3591c066 | 515 | while (f && !feof(f)) { |
2e94e70e | 516 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
517 | if (len > 0) { |
518 | line[len] = 0; | |
68f40ebb | 519 | io_printf(f_out, "%s", line); |
3591c066 AT |
520 | } |
521 | } | |
2e94e70e WD |
522 | if (f) |
523 | fclose(f); | |
68f40ebb | 524 | io_printf(f_out, "\n"); |
3591c066 AT |
525 | } |
526 | ||
2e94e70e | 527 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 528 | return -1; |
91eee594 | 529 | |
daa598df | 530 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 531 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 532 | return -1; |
4a7144ee | 533 | } |
daa598df WD |
534 | if (protocol_version > remote_protocol) |
535 | protocol_version = remote_protocol; | |
91eee594 | 536 | |
8ef4ffd6 | 537 | while (i == -1) { |
3591c066 | 538 | line[0] = 0; |
2e94e70e | 539 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 540 | return -1; |
3591c066 | 541 | |
2e94e70e | 542 | if (!*line || strcmp(line,"#list") == 0) { |
68f40ebb | 543 | send_listing(f_out); |
3591c066 | 544 | return -1; |
4a7144ee | 545 | } |
3591c066 AT |
546 | |
547 | if (*line == '#') { | |
548 | /* it's some sort of command that I don't understand */ | |
68f40ebb | 549 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
3591c066 AT |
550 | return -1; |
551 | } | |
552 | ||
553 | i = lp_number(line); | |
554 | if (i == -1) { | |
68f40ebb | 555 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
3591c066 AT |
556 | return -1; |
557 | } | |
3591c066 AT |
558 | } |
559 | ||
68f40ebb | 560 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
561 | } |
562 | ||
563 | ||
564 | int daemon_main(void) | |
565 | { | |
8638dd48 | 566 | char *pid_file; |
1a016bfd | 567 | |
3591c066 | 568 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
569 | int i; |
570 | ||
571 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
572 | * stderr so that library functions (and getopt) don't |
573 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 574 | for (i = 1; i < 3; i++) { |
4a7144ee | 575 | close(i); |
41979ff8 AT |
576 | open("/dev/null", O_RDWR); |
577 | } | |
3eb38818 | 578 | |
68f40ebb | 579 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
580 | } |
581 | ||
13e29995 | 582 | if (!no_detach) |
4a7144ee | 583 | become_daemon(); |
3591c066 | 584 | |
2e94e70e | 585 | if (!lp_load(config_file, 1)) |
65417579 | 586 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 587 | |
45a83540 | 588 | log_init(); |
f9e940ef | 589 | |
9e5a5ddb | 590 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
591 | RSYNC_VERSION, rsync_port); |
592 | /* TODO: If listening on a particular address, then show that | |
593 | * address too. In fact, why not just do inet_ntop on the | |
594 | * local address??? */ | |
e42c9458 | 595 | |
8638dd48 | 596 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
597 | char pidbuf[16]; |
598 | int fd; | |
05b7bab8 | 599 | pid_t pid = getpid(); |
8638dd48 | 600 | cleanup_set_pid(pid); |
ad517ce5 DD |
601 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
602 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee WD |
603 | cleanup_set_pid(0); |
604 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); | |
605 | exit_cleanup(RERR_FILEIO); | |
8638dd48 | 606 | } |
05b7bab8 | 607 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
608 | write(fd, pidbuf, strlen(pidbuf)); |
609 | close(fd); | |
8638dd48 DD |
610 | } |
611 | ||
8ef4ffd6 AT |
612 | start_accept_loop(rsync_port, start_daemon); |
613 | return -1; | |
3591c066 | 614 | } |