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 | ||
c0814b81 WD |
30 | extern int verbose; |
31 | extern int list_only; | |
6e195fe9 WD |
32 | extern int am_sender; |
33 | extern int am_server; | |
34 | extern int am_daemon; | |
35 | extern int am_root; | |
3591c066 | 36 | extern int rsync_port; |
8dad7fc6 | 37 | extern int kluge_around_eof; |
6e195fe9 | 38 | extern int daemon_over_rsh; |
b35d0d8e | 39 | extern int sanitize_paths; |
7c2a9e76 | 40 | extern int filesfrom_fd; |
daa598df WD |
41 | extern int remote_protocol; |
42 | extern int protocol_version; | |
6e195fe9 WD |
43 | extern int io_timeout; |
44 | extern int orig_umask; | |
45 | extern int no_detach; | |
46 | extern int default_af_hint; | |
47 | extern char *bind_address; | |
7842418b | 48 | extern struct filter_list_struct server_filter_list; |
6e195fe9 | 49 | extern char *config_file; |
bf4679e8 | 50 | extern char *files_from; |
fed1f3f4 | 51 | extern char *tmpdir; |
6e195fe9 WD |
52 | |
53 | char *auth_user; | |
18638730 | 54 | int read_only = 0; |
f39b2060 WD |
55 | int daemon_log_format_has_i = 0; |
56 | int daemon_log_format_has_o_or_i = 0; | |
211bc43b | 57 | int module_id = -1; |
3591c066 | 58 | |
e7bf7c01 WD |
59 | /* Length of lp_path() string when in daemon mode & not chrooted, else 0. */ |
60 | unsigned int module_dirlen = 0; | |
61 | ||
be2961da | 62 | /** |
bc363ea9 | 63 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
64 | * function for remote-shell connections is do_cmd(). |
65 | * | |
fdf88d75 MP |
66 | * After negotiating which module to use and reading the server's |
67 | * motd, this hands over to client_run(). Telling the server the | |
68 | * module will cause it to chroot/setuid/etc. | |
69 | * | |
70 | * Instead of doing a transfer, the client may at this stage instead | |
71 | * get a listing of remote modules and exit. | |
be2961da MP |
72 | * |
73 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 74 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 75 | **/ |
3591c066 AT |
76 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
77 | { | |
68f40ebb | 78 | int fd, ret; |
2e94e70e | 79 | char *p, *user = NULL; |
4a7144ee | 80 | |
1732b6c0 WD |
81 | /* This is redundant with code in start_inband_exchange(), but this |
82 | * short-circuits a problem in the client before we open a socket, | |
83 | * and the extra check won't hurt. */ | |
f98df1d9 | 84 | if (*path == '/') { |
1732b6c0 WD |
85 | rprintf(FERROR, |
86 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
87 | return -1; |
88 | } | |
89 | ||
b31c92ed | 90 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
91 | user = host; |
92 | host = p+1; | |
1732b6c0 | 93 | *p = '\0'; |
bcb7e502 AT |
94 | } |
95 | ||
837cbad9 WD |
96 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
97 | default_af_hint); | |
df5cd107 | 98 | if (fd == -1) |
65417579 | 99 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb WD |
100 | |
101 | ret = start_inband_exchange(user, path, fd, fd, argc); | |
102 | ||
180443af | 103 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
104 | } |
105 | ||
b9f592fb WD |
106 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
107 | int argc) | |
68f40ebb WD |
108 | { |
109 | int i; | |
110 | char *sargs[MAX_ARGS]; | |
111 | int sargc = 0; | |
20accf4d | 112 | char line[BIGPATHBUFLEN]; |
68f40ebb | 113 | char *p; |
68f40ebb WD |
114 | |
115 | if (argc == 0 && !am_sender) | |
9bcb2595 | 116 | list_only |= 1; |
68f40ebb WD |
117 | |
118 | if (*path == '/') { | |
1732b6c0 WD |
119 | rprintf(FERROR, |
120 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
121 | return -1; |
122 | } | |
123 | ||
2e94e70e WD |
124 | if (!user) |
125 | user = getenv("USER"); | |
126 | if (!user) | |
127 | user = getenv("LOGNAME"); | |
68f40ebb | 128 | |
5a8543b8 | 129 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
91eee594 | 130 | |
2e94e70e | 131 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 132 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
3591c066 AT |
133 | return -1; |
134 | } | |
135 | ||
daa598df | 136 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
be2961da MP |
137 | /* note that read_line strips of \n or \r */ |
138 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", | |
139 | line); | |
3591c066 AT |
140 | return -1; |
141 | } | |
daa598df WD |
142 | if (protocol_version > remote_protocol) |
143 | protocol_version = remote_protocol; | |
3591c066 | 144 | |
9bcb2595 WD |
145 | if (list_only && protocol_version >= 29) |
146 | list_only |= 2; | |
147 | ||
148 | /* set daemon_over_rsh to false since we need to build the | |
149 | * true set of args passed through the rsh/ssh connection; | |
150 | * this is a no-op for direct-socket-connection mode */ | |
151 | daemon_over_rsh = 0; | |
152 | server_options(sargs, &sargc); | |
153 | ||
154 | sargs[sargc++] = "."; | |
155 | ||
156 | if (path && *path) | |
157 | sargs[sargc++] = path; | |
158 | ||
159 | sargs[sargc] = NULL; | |
160 | ||
161 | if (verbose > 1) | |
162 | print_child_argv(sargs); | |
163 | ||
2c91d3d3 AT |
164 | p = strchr(path,'/'); |
165 | if (p) *p = 0; | |
68f40ebb | 166 | io_printf(f_out, "%s\n", path); |
2c91d3d3 AT |
167 | if (p) *p = '/'; |
168 | ||
063393d6 MP |
169 | /* Old servers may just drop the connection here, |
170 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 171 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 172 | |
063393d6 | 173 | while (1) { |
2e94e70e | 174 | if (!read_line(f_in, line, sizeof line - 1)) { |
be2961da | 175 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
176 | return -1; |
177 | } | |
31593dd6 | 178 | |
31593dd6 | 179 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 180 | auth_client(f_out, user, line+18); |
31593dd6 AT |
181 | continue; |
182 | } | |
31593dd6 | 183 | |
2e94e70e WD |
184 | if (strcmp(line,"@RSYNCD: OK") == 0) |
185 | break; | |
8f04bb36 | 186 | |
cae95647 MP |
187 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
188 | /* This is sent by recent versions of the | |
189 | * server to terminate the listing of modules. | |
190 | * We don't want to go on and transfer | |
191 | * anything; just exit. */ | |
192 | exit(0); | |
193 | } | |
8f04bb36 | 194 | |
136ac7ec | 195 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 196 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
197 | /* This is always fatal; the server will now |
198 | * close the socket. */ | |
180443af | 199 | return -1; |
136ac7ec | 200 | } |
180443af WD |
201 | |
202 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 203 | } |
8dad7fc6 | 204 | kluge_around_eof = 0; |
3591c066 | 205 | |
68f40ebb WD |
206 | for (i = 0; i < sargc; i++) { |
207 | io_printf(f_out, "%s\n", sargs[i]); | |
3591c066 | 208 | } |
68f40ebb | 209 | io_printf(f_out, "\n"); |
3591c066 | 210 | |
daa598df | 211 | if (protocol_version < 23) { |
3f55bd5d | 212 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 213 | io_start_multiplex_in(); |
09b7f5db | 214 | } |
8d9dc9f9 | 215 | |
68f40ebb | 216 | return 0; |
3591c066 AT |
217 | } |
218 | ||
219 | ||
220 | ||
68f40ebb | 221 | static int rsync_module(int f_in, int f_out, int i) |
3591c066 | 222 | { |
2e94e70e | 223 | int argc = 0; |
b7061c82 WD |
224 | int maxargs; |
225 | char **argv; | |
20accf4d | 226 | char line[BIGPATHBUFLEN]; |
2af27ad9 | 227 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 228 | gid_t gid = (gid_t)-2; |
8ef4ffd6 | 229 | char *p; |
9d0d18b5 WD |
230 | #ifdef HAVE_PUTENV |
231 | char *s; | |
232 | #endif | |
09021eab DD |
233 | char *addr = client_addr(f_in); |
234 | char *host = client_name(f_in); | |
874895d5 | 235 | char *name = lp_name(i); |
8638dd48 | 236 | int use_chroot = lp_use_chroot(i); |
2e94e70e | 237 | int start_glob = 0; |
41979ff8 | 238 | int ret; |
2e94e70e | 239 | char *request = NULL; |
56c473b7 AT |
240 | |
241 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { | |
1732b6c0 | 242 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 243 | name, host, addr); |
c0422cea WD |
244 | if (!lp_list(i)) |
245 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
246 | else { | |
247 | io_printf(f_out, | |
248 | "@ERROR: access denied to %s from %s (%s)\n", | |
249 | name, host, addr); | |
250 | } | |
56c473b7 AT |
251 | return -1; |
252 | } | |
3591c066 | 253 | |
68f40ebb | 254 | if (am_daemon && am_server) { |
9e5a5ddb | 255 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
256 | name, host, addr); |
257 | } | |
258 | ||
5e71c444 | 259 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 260 | if (errno) { |
1732b6c0 | 261 | rsyserr(FLOG, errno, "failed to open lock file %s", |
4875d6b6 WD |
262 | safe_fname(lp_lock_file(i))); |
263 | io_printf(f_out, "@ERROR: failed to open lock file\n"); | |
8d72ef6e | 264 | } else { |
1732b6c0 | 265 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 266 | lp_max_connections(i)); |
4ccfd96c | 267 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 268 | lp_max_connections(i)); |
8d72ef6e | 269 | } |
0c515f17 AT |
270 | return -1; |
271 | } | |
272 | ||
45c5b903 | 273 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 274 | |
97cb8dc2 | 275 | if (!auth_user) { |
68f40ebb | 276 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 277 | return -1; |
d0d56395 AT |
278 | } |
279 | ||
3591c066 AT |
280 | module_id = i; |
281 | ||
211bc43b | 282 | if (lp_read_only(i)) |
18638730 WD |
283 | read_only = 1; |
284 | ||
f39b2060 | 285 | if (lp_transfer_logging(i)) { |
624d6be2 | 286 | if (log_format_has(lp_log_format(i), 'i')) |
f39b2060 WD |
287 | daemon_log_format_has_i = 1; |
288 | if (daemon_log_format_has_i | |
624d6be2 | 289 | || log_format_has(lp_log_format(i), 'o')) |
f39b2060 WD |
290 | daemon_log_format_has_o_or_i = 1; |
291 | } | |
c0814b81 | 292 | |
6fe05820 | 293 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 294 | |
716baed7 DD |
295 | if (am_root) { |
296 | p = lp_uid(i); | |
297 | if (!name_to_uid(p, &uid)) { | |
2e94e70e | 298 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 299 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 300 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 301 | return -1; |
4a7144ee | 302 | } |
716baed7 DD |
303 | uid = atoi(p); |
304 | } | |
305 | ||
306 | p = lp_gid(i); | |
307 | if (!name_to_gid(p, &gid)) { | |
2e94e70e | 308 | if (!isdigit(*(unsigned char *)p)) { |
1732b6c0 | 309 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 310 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 311 | return -1; |
4a7144ee | 312 | } |
716baed7 DD |
313 | gid = atoi(p); |
314 | } | |
8ef4ffd6 | 315 | } |
3b2b5345 | 316 | |
4a7144ee WD |
317 | /* TODO: If we're not root, but the configuration requests |
318 | * that we change to some uid other than the current one, then | |
319 | * log a warning. */ | |
320 | ||
321 | /* TODO: Perhaps take a list of gids, and make them into the | |
322 | * supplementary groups. */ | |
8ef4ffd6 | 323 | |
46bffd98 | 324 | if (use_chroot || (module_dirlen = strlen(lp_path(i))) == 1) { |
e7bf7c01 | 325 | module_dirlen = 0; |
7842418b | 326 | set_filter_dir("/", 1); |
46bffd98 | 327 | } else |
7842418b | 328 | set_filter_dir(lp_path(i), module_dirlen); |
e7bf7c01 WD |
329 | |
330 | p = lp_filter(i); | |
ebfd1a1c | 331 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 332 | XFLG_ABS_IF_SLASH); |
837cbad9 | 333 | |
cd64343a | 334 | p = lp_include_from(i); |
ebfd1a1c | 335 | parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE, |
2c8c8bba | 336 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
337 | |
338 | p = lp_include(i); | |
ebfd1a1c | 339 | parse_rule(&server_filter_list, p, |
0a68f869 | 340 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
2c8c8bba | 341 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
cd64343a | 342 | |
8f3a2d54 | 343 | p = lp_exclude_from(i); |
ebfd1a1c | 344 | parse_filter_file(&server_filter_list, p, 0, |
2c8c8bba | 345 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 346 | |
5805327b | 347 | p = lp_exclude(i); |
ebfd1a1c | 348 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 349 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
8f3a2d54 | 350 | |
45a83540 | 351 | log_init(); |
1a016bfd | 352 | |
9d0d18b5 WD |
353 | #ifdef HAVE_PUTENV |
354 | s = lp_prexfer_exec(i); | |
355 | p = lp_postxfer_exec(i); | |
356 | if ((s && *s) || (p && *p)) { | |
357 | char *modname, *modpath, *hostaddr, *hostname, *username; | |
358 | int status; | |
359 | if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0 | |
360 | || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", lp_path(i)) < 0 | |
361 | || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0 | |
362 | || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0 | |
363 | || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0) | |
364 | out_of_memory("rsync_module"); | |
365 | putenv(modname); | |
366 | putenv(modpath); | |
367 | putenv(hostaddr); | |
368 | putenv(hostname); | |
369 | putenv(username); | |
370 | umask(orig_umask); | |
371 | if (s && *s) { | |
372 | status = system(s); | |
373 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
374 | rprintf(FLOG, "prexfer-exec failed\n"); | |
375 | io_printf(f_out, "@ERROR: prexfer-exec failed\n"); | |
376 | return -1; | |
377 | } | |
378 | } | |
379 | if (p && *p) { | |
380 | pid_t pid = fork(); | |
381 | if (pid < 0) { | |
382 | rsyserr(FLOG, errno, "fork failed"); | |
383 | io_printf(f_out, "@ERROR: fork failed\n"); | |
384 | return -1; | |
385 | } | |
386 | if (pid) { | |
387 | char *ret1, *ret2; | |
388 | waitpid(pid, &status, 0); | |
389 | if (asprintf(&ret1, "RSYNC_RAW_STATUS=%d", status) > 0) | |
390 | putenv(ret1); | |
391 | if (WIFEXITED(status)) | |
392 | status = WEXITSTATUS(status); | |
393 | else | |
394 | status = -1; | |
395 | if (asprintf(&ret2, "RSYNC_EXIT_STATUS=%d", status) > 0) | |
396 | putenv(ret2); | |
397 | system(p); | |
398 | _exit(status); | |
399 | } | |
400 | } | |
401 | umask(0); | |
402 | } | |
403 | #endif | |
404 | ||
8638dd48 | 405 | if (use_chroot) { |
b52c1d9d MP |
406 | /* |
407 | * XXX: The 'use chroot' flag is a fairly reliable | |
408 | * source of confusion, because it fails under two | |
409 | * important circumstances: running as non-root, | |
410 | * running on Win32 (or possibly others). On the | |
411 | * other hand, if you are running as root, then it | |
412 | * might be better to always use chroot. | |
413 | * | |
414 | * So, perhaps if we can't chroot we should just issue | |
415 | * a warning, unless a "require chroot" flag is set, | |
416 | * in which case we fail. | |
417 | */ | |
8638dd48 | 418 | if (chroot(lp_path(i))) { |
4875d6b6 WD |
419 | rsyserr(FLOG, errno, "chroot %s failed", |
420 | safe_fname(lp_path(i))); | |
68f40ebb | 421 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
422 | return -1; |
423 | } | |
3591c066 | 424 | |
59187666 | 425 | if (!push_dir("/")) { |
4875d6b6 WD |
426 | rsyserr(FLOG, errno, "chdir %s failed\n", |
427 | safe_fname(lp_path(i))); | |
68f40ebb | 428 | io_printf(f_out, "@ERROR: chdir failed\n"); |
8638dd48 DD |
429 | return -1; |
430 | } | |
3591c066 | 431 | |
716baed7 | 432 | } else { |
59187666 | 433 | if (!push_dir(lp_path(i))) { |
4875d6b6 WD |
434 | rsyserr(FLOG, errno, "chdir %s failed\n", |
435 | safe_fname(lp_path(i))); | |
68f40ebb | 436 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
437 | return -1; |
438 | } | |
cb13abfe | 439 | sanitize_paths = 1; |
716baed7 DD |
440 | } |
441 | ||
442 | if (am_root) { | |
715d1f45 MP |
443 | /* XXXX: You could argue that if the daemon is started |
444 | * by a non-root user and they explicitly specify a | |
445 | * gid, then we should try to change to that gid -- | |
446 | * this could be possible if it's already in their | |
447 | * supplementary groups. */ | |
448 | ||
449 | /* TODO: Perhaps we need to document that if rsyncd is | |
450 | * started by somebody other than root it will inherit | |
451 | * all their supplementary groups. */ | |
452 | ||
716baed7 | 453 | if (setgid(gid)) { |
1732b6c0 | 454 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 455 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
456 | return -1; |
457 | } | |
4f5b0756 | 458 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
459 | /* Get rid of any supplementary groups this process |
460 | * might have inheristed. */ | |
461 | if (setgroups(1, &gid)) { | |
1732b6c0 | 462 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
463 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
464 | return -1; | |
465 | } | |
466 | #endif | |
3591c066 | 467 | |
716baed7 | 468 | if (setuid(uid)) { |
1732b6c0 | 469 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 470 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
471 | return -1; |
472 | } | |
473 | ||
6fe05820 | 474 | am_root = (MY_UID() == 0); |
3591c066 AT |
475 | } |
476 | ||
fed1f3f4 WD |
477 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
478 | tmpdir = lp_temp_dir(i); | |
479 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
480 | rprintf(FLOG, | |
481 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
482 | name); | |
483 | tmpdir = NULL; | |
484 | } | |
485 | } | |
486 | ||
68f40ebb | 487 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 488 | |
b7061c82 WD |
489 | maxargs = MAX_ARGS; |
490 | if (!(argv = new_array(char *, maxargs))) | |
491 | out_of_memory("rsync_module"); | |
3591c066 AT |
492 | argv[argc++] = "rsyncd"; |
493 | ||
494 | while (1) { | |
2e94e70e | 495 | if (!read_line(f_in, line, sizeof line - 1)) |
3591c066 | 496 | return -1; |
3591c066 | 497 | |
2e94e70e WD |
498 | if (!*line) |
499 | break; | |
3591c066 | 500 | |
874895d5 AT |
501 | p = line; |
502 | ||
b7061c82 WD |
503 | if (argc == maxargs) { |
504 | maxargs += MAX_ARGS; | |
505 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
506 | out_of_memory("rsync_module"); | |
507 | } | |
2e94e70e | 508 | if (!(argv[argc] = strdup(p))) |
b7061c82 | 509 | out_of_memory("rsync_module"); |
3591c066 | 510 | |
20accf4d WD |
511 | switch (start_glob) { |
512 | case 0: | |
874895d5 | 513 | argc++; |
20accf4d WD |
514 | if (strcmp(line, ".") == 0) |
515 | start_glob = 1; | |
516 | break; | |
517 | case 1: | |
518 | request = strdup(p); | |
519 | start_glob = 2; | |
520 | /* FALL THROUGH */ | |
521 | default: | |
522 | glob_expand(name, &argv, &argc, &maxargs); | |
523 | break; | |
524 | } | |
3591c066 AT |
525 | } |
526 | ||
18638730 | 527 | verbose = 0; /* future verbosity is controlled by client options */ |
c9dc1300 | 528 | ret = parse_arguments(&argc, (const char ***) &argv, 0); |
3591c066 | 529 | |
7c2a9e76 WD |
530 | if (filesfrom_fd == 0) |
531 | filesfrom_fd = f_in; | |
532 | ||
7b372642 | 533 | if (request) { |
97cb8dc2 | 534 | if (*auth_user) { |
9e5a5ddb WD |
535 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
536 | am_sender ? "on" : "to", | |
97cb8dc2 | 537 | request, auth_user, host, addr); |
d0d56395 | 538 | } else { |
9e5a5ddb WD |
539 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
540 | am_sender ? "on" : "to", | |
d0d56395 AT |
541 | request, host, addr); |
542 | } | |
7b372642 AT |
543 | free(request); |
544 | } | |
545 | ||
15b7b73d | 546 | #ifndef DEBUG |
3591c066 | 547 | /* don't allow the logs to be flooded too fast */ |
59b0e7a8 WD |
548 | if (verbose > lp_max_verbosity(i)) |
549 | verbose = lp_max_verbosity(i); | |
0199b05f | 550 | #endif |
3591c066 | 551 | |
1732b6c0 WD |
552 | if (protocol_version < 23 |
553 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 554 | io_start_multiplex_out(); |
1732b6c0 WD |
555 | else if (!ret) { |
556 | /* We have to get I/O multiplexing started so that we can | |
557 | * get the error back to the client. This means getting | |
558 | * the protocol setup finished first in later versions. */ | |
559 | setup_protocol(f_out, f_in); | |
b03c719f WD |
560 | if (!am_sender) { |
561 | /* Since we failed in our option parsing, we may not | |
562 | * have finished parsing that the client sent us a | |
563 | * --files-from option, so look for it manually. | |
564 | * Without this, the socket would be in the wrong | |
565 | * state for the upcoming error message. */ | |
566 | if (!files_from) { | |
567 | int i; | |
568 | for (i = 0; i < argc; i++) { | |
569 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
570 | files_from = ""; | |
571 | break; | |
572 | } | |
573 | } | |
574 | } | |
575 | if (files_from) | |
576 | write_byte(f_out, 0); | |
577 | } | |
da3478b2 | 578 | io_start_multiplex_out(); |
554e0a8d | 579 | } |
15b7b73d | 580 | |
41979ff8 | 581 | if (!ret) { |
4a7144ee | 582 | option_error(); |
7e561438 | 583 | msleep(400); |
4a7144ee | 584 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
585 | } |
586 | ||
3e6ddb37 WD |
587 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
588 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 589 | |
c9dc1300 | 590 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
591 | |
592 | return 0; | |
593 | } | |
594 | ||
7a6421fa AT |
595 | /* send a list of available modules to the client. Don't list those |
596 | with "list = False". */ | |
3591c066 AT |
597 | static void send_listing(int fd) |
598 | { | |
599 | int n = lp_numservices(); | |
600 | int i; | |
063393d6 | 601 | |
c0422cea | 602 | for (i = 0; i < n; i++) { |
3591c066 | 603 | if (lp_list(i)) |
4a7144ee | 604 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 605 | } |
8f04bb36 | 606 | |
daa598df | 607 | if (protocol_version >= 25) |
063393d6 | 608 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
609 | } |
610 | ||
68f40ebb | 611 | /* this is called when a connection is established to a client |
3591c066 AT |
612 | and we want to start talking. The setup of the system is done from |
613 | here */ | |
68f40ebb | 614 | int start_daemon(int f_in, int f_out) |
3591c066 | 615 | { |
20accf4d | 616 | char line[1024]; |
3591c066 | 617 | char *motd; |
c0422cea | 618 | int i; |
4cdf25e4 | 619 | |
da3478b2 WD |
620 | io_set_sock_fds(f_in, f_out); |
621 | ||
2e94e70e | 622 | if (!lp_load(config_file, 0)) |
65417579 | 623 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 624 | |
30e8c8e1 DD |
625 | log_init(); |
626 | ||
68f40ebb WD |
627 | if (!am_server) { |
628 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
629 | set_socket_options(f_in, lp_socket_options()); | |
630 | set_nonblocking(f_in); | |
631 | } | |
3591c066 | 632 | |
5a8543b8 | 633 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
3591c066 AT |
634 | |
635 | motd = lp_motd_file(); | |
27d3cdbc | 636 | if (motd && *motd) { |
0090cbdb | 637 | FILE *f = fopen(motd,"r"); |
3591c066 | 638 | while (f && !feof(f)) { |
2e94e70e | 639 | int len = fread(line, 1, sizeof line - 1, f); |
3591c066 AT |
640 | if (len > 0) { |
641 | line[len] = 0; | |
68f40ebb | 642 | io_printf(f_out, "%s", line); |
3591c066 AT |
643 | } |
644 | } | |
2e94e70e WD |
645 | if (f) |
646 | fclose(f); | |
68f40ebb | 647 | io_printf(f_out, "\n"); |
3591c066 AT |
648 | } |
649 | ||
2e94e70e | 650 | if (!read_line(f_in, line, sizeof line - 1)) |
91eee594 | 651 | return -1; |
91eee594 | 652 | |
daa598df | 653 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
68f40ebb | 654 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
91eee594 | 655 | return -1; |
4a7144ee | 656 | } |
daa598df WD |
657 | if (protocol_version > remote_protocol) |
658 | protocol_version = remote_protocol; | |
91eee594 | 659 | |
c0422cea WD |
660 | line[0] = 0; |
661 | if (!read_line(f_in, line, sizeof line - 1)) | |
662 | return -1; | |
3591c066 | 663 | |
c0422cea WD |
664 | if (!*line || strcmp(line, "#list") == 0) { |
665 | send_listing(f_out); | |
666 | return -1; | |
667 | } | |
3591c066 | 668 | |
c0422cea WD |
669 | if (*line == '#') { |
670 | /* it's some sort of command that I don't understand */ | |
671 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
672 | return -1; | |
673 | } | |
3591c066 | 674 | |
c0422cea WD |
675 | if ((i = lp_number(line)) < 0) { |
676 | char *addr = client_addr(f_in); | |
677 | char *host = client_name(f_in); | |
678 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", | |
679 | line, host, addr); | |
680 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
681 | return -1; | |
3591c066 AT |
682 | } |
683 | ||
68f40ebb | 684 | return rsync_module(f_in, f_out, i); |
3591c066 AT |
685 | } |
686 | ||
687 | ||
688 | int daemon_main(void) | |
689 | { | |
8638dd48 | 690 | char *pid_file; |
1a016bfd | 691 | |
3591c066 | 692 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
693 | int i; |
694 | ||
695 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
696 | * stderr so that library functions (and getopt) don't |
697 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 698 | for (i = 1; i < 3; i++) { |
4a7144ee | 699 | close(i); |
41979ff8 AT |
700 | open("/dev/null", O_RDWR); |
701 | } | |
3eb38818 | 702 | |
68f40ebb | 703 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
704 | } |
705 | ||
13e29995 | 706 | if (!no_detach) |
4a7144ee | 707 | become_daemon(); |
3591c066 | 708 | |
2e94e70e | 709 | if (!lp_load(config_file, 1)) |
65417579 | 710 | exit_cleanup(RERR_SYNTAX); |
f9e940ef | 711 | |
0c56b1ad WD |
712 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
713 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 714 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 715 | bind_address = lp_bind_address(); |
0c56b1ad | 716 | |
45a83540 | 717 | log_init(); |
f9e940ef | 718 | |
9e5a5ddb | 719 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
720 | RSYNC_VERSION, rsync_port); |
721 | /* TODO: If listening on a particular address, then show that | |
722 | * address too. In fact, why not just do inet_ntop on the | |
723 | * local address??? */ | |
e42c9458 | 724 | |
8638dd48 | 725 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
ad517ce5 DD |
726 | char pidbuf[16]; |
727 | int fd; | |
05b7bab8 | 728 | pid_t pid = getpid(); |
8638dd48 | 729 | cleanup_set_pid(pid); |
ad517ce5 DD |
730 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
731 | 0666 & ~orig_umask)) == -1) { | |
4a7144ee | 732 | cleanup_set_pid(0); |
4875d6b6 WD |
733 | rsyserr(FLOG, errno, "failed to create pid file %s", |
734 | safe_fname(pid_file)); | |
4a7144ee | 735 | exit_cleanup(RERR_FILEIO); |
8638dd48 | 736 | } |
05b7bab8 | 737 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
ad517ce5 DD |
738 | write(fd, pidbuf, strlen(pidbuf)); |
739 | close(fd); | |
8638dd48 DD |
740 | } |
741 | ||
8ef4ffd6 AT |
742 | start_accept_loop(rsync_port, start_daemon); |
743 | return -1; | |
3591c066 | 744 | } |