Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * The socket based protocol for setting up a connection with rsyncd. | |
4a7144ee | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org> |
5 | * Copyright (C) 2001-2002 Martin Pool <mbp@samba.org> | |
ba2133d6 | 6 | * Copyright (C) 2002-2007 Wayne Davison |
4a7144ee | 7 | * |
a254fd97 | 8 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 3 of the License, or | |
11 | * (at your option) any later version. | |
4a7144ee | 12 | * |
a254fd97 MP |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
4a7144ee | 17 | * |
e7c67065 | 18 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
a254fd97 | 20 | */ |
3591c066 | 21 | |
3591c066 | 22 | #include "rsync.h" |
1b42f628 | 23 | #include "ifuncs.h" |
3591c066 | 24 | |
c0814b81 | 25 | extern int verbose; |
5223b786 | 26 | extern int dry_run; |
9ce7fc38 | 27 | extern int output_motd; |
c0814b81 | 28 | extern int list_only; |
6e195fe9 WD |
29 | extern int am_sender; |
30 | extern int am_server; | |
31 | extern int am_daemon; | |
32 | extern int am_root; | |
3591c066 | 33 | extern int rsync_port; |
3162ea6f | 34 | extern int ignore_errors; |
8dad7fc6 | 35 | extern int kluge_around_eof; |
6e195fe9 | 36 | extern int daemon_over_rsh; |
b35d0d8e | 37 | extern int sanitize_paths; |
0b52f94d | 38 | extern int numeric_ids; |
7c2a9e76 | 39 | extern int filesfrom_fd; |
daa598df WD |
40 | extern int remote_protocol; |
41 | extern int protocol_version; | |
6e195fe9 | 42 | extern int io_timeout; |
6e195fe9 | 43 | extern int no_detach; |
5223b786 | 44 | extern int write_batch; |
6e195fe9 | 45 | extern int default_af_hint; |
ecc7623e WD |
46 | extern int logfile_format_has_i; |
47 | extern int logfile_format_has_o_or_i; | |
c5b7aa15 | 48 | extern mode_t orig_umask; |
6e195fe9 | 49 | extern char *bind_address; |
34937987 | 50 | extern char *sockopts; |
6e195fe9 | 51 | extern char *config_file; |
ecc7623e | 52 | extern char *logfile_format; |
bf4679e8 | 53 | extern char *files_from; |
fed1f3f4 | 54 | extern char *tmpdir; |
730df9d2 WD |
55 | extern struct chmod_mode_struct *chmod_modes; |
56 | extern struct filter_list_struct server_filter_list; | |
33cbd577 | 57 | extern char curr_dir[]; |
0b52f94d WD |
58 | #ifdef ICONV_OPTION |
59 | extern char *iconv_opt; | |
60 | extern iconv_t ic_send, ic_recv; | |
61 | #endif | |
6e195fe9 WD |
62 | |
63 | char *auth_user; | |
18638730 | 64 | int read_only = 0; |
211bc43b | 65 | int module_id = -1; |
9585b276 | 66 | int munge_symlinks = 0; |
8840ec0f | 67 | struct chmod_mode_struct *daemon_chmod_modes; |
3591c066 | 68 | |
33cbd577 | 69 | /* module_dirlen is the length of the module_dir string when in daemon |
2fe1feea WD |
70 | * mode and module_dir is not "/"; otherwise 0. (Note that a chroot- |
71 | * enabled module can have a non-"/" module_dir these days.) */ | |
33cbd577 | 72 | char *module_dir = NULL; |
e7bf7c01 WD |
73 | unsigned int module_dirlen = 0; |
74 | ||
7909e65f WD |
75 | static int rl_nulls = 0; |
76 | ||
d749eb68 WD |
77 | #ifdef HAVE_SIGACTION |
78 | static struct sigaction sigact; | |
79 | #endif | |
80 | ||
be2961da | 81 | /** |
bc363ea9 | 82 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
83 | * function for remote-shell connections is do_cmd(). |
84 | * | |
fdf88d75 MP |
85 | * After negotiating which module to use and reading the server's |
86 | * motd, this hands over to client_run(). Telling the server the | |
87 | * module will cause it to chroot/setuid/etc. | |
88 | * | |
89 | * Instead of doing a transfer, the client may at this stage instead | |
90 | * get a listing of remote modules and exit. | |
be2961da MP |
91 | * |
92 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 93 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 94 | **/ |
7909e65f WD |
95 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
96 | int argc, char *argv[]) | |
3591c066 | 97 | { |
68f40ebb | 98 | int fd, ret; |
2e94e70e | 99 | char *p, *user = NULL; |
4a7144ee | 100 | |
1732b6c0 WD |
101 | /* This is redundant with code in start_inband_exchange(), but this |
102 | * short-circuits a problem in the client before we open a socket, | |
103 | * and the extra check won't hurt. */ | |
7909e65f | 104 | if (**remote_argv == '/') { |
1732b6c0 WD |
105 | rprintf(FERROR, |
106 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
107 | return -1; |
108 | } | |
109 | ||
b31c92ed | 110 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
111 | user = host; |
112 | host = p+1; | |
1732b6c0 | 113 | *p = '\0'; |
bcb7e502 AT |
114 | } |
115 | ||
837cbad9 WD |
116 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
117 | default_af_hint); | |
df5cd107 | 118 | if (fd == -1) |
65417579 | 119 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 120 | |
34937987 WD |
121 | set_socket_options(fd, sockopts); |
122 | ||
7909e65f | 123 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 124 | |
180443af | 125 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
126 | } |
127 | ||
7909e65f WD |
128 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
129 | { | |
130 | int remote_sub = -1; | |
131 | #if SUBPROTOCOL_VERSION != 0 | |
132 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
133 | #else | |
134 | int our_sub = 0; | |
135 | #endif | |
136 | char *motd; | |
137 | ||
138 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
139 | ||
140 | if (!am_client) { | |
141 | motd = lp_motd_file(); | |
142 | if (motd && *motd) { | |
143 | FILE *f = fopen(motd,"r"); | |
144 | while (f && !feof(f)) { | |
145 | int len = fread(buf, 1, bufsiz - 1, f); | |
146 | if (len > 0) | |
147 | write_buf(f_out, buf, len); | |
148 | } | |
149 | if (f) | |
150 | fclose(f); | |
151 | write_sbuf(f_out, "\n"); | |
152 | } | |
153 | } | |
154 | ||
155 | /* This strips the \n. */ | |
156 | if (!read_line_old(f_in, buf, bufsiz)) { | |
157 | if (am_client) | |
158 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
159 | return -1; | |
160 | } | |
161 | ||
162 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
163 | if (am_client) | |
164 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
165 | else | |
166 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | if (remote_sub < 0) { | |
171 | if (remote_protocol == 30) { | |
172 | if (am_client) | |
173 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
174 | else | |
175 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
176 | return -1; | |
177 | } | |
178 | remote_sub = 0; | |
179 | } | |
180 | ||
181 | if (protocol_version > remote_protocol) { | |
182 | protocol_version = remote_protocol; | |
183 | if (remote_sub) | |
184 | protocol_version--; | |
185 | } else if (protocol_version == remote_protocol) { | |
186 | if (remote_sub != our_sub) | |
187 | protocol_version--; | |
188 | } | |
189 | #if SUBPROTOCOL_VERSION != 0 | |
190 | else if (protocol_version < remote_protocol) { | |
191 | if (our_sub) | |
192 | protocol_version--; | |
193 | } | |
194 | #endif | |
195 | ||
196 | if (protocol_version >= 30) | |
197 | rl_nulls = 1; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 203 | { |
e844a4a8 | 204 | int i, modlen; |
7909e65f | 205 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
206 | char *sargs[MAX_ARGS]; |
207 | int sargc = 0; | |
e844a4a8 | 208 | char *p, *modname; |
68f40ebb | 209 | |
e844a4a8 | 210 | assert(argc > 0); |
68f40ebb | 211 | |
e844a4a8 | 212 | if (**argv == '/') { |
1732b6c0 WD |
213 | rprintf(FERROR, |
214 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
215 | return -1; |
216 | } | |
217 | ||
e844a4a8 WD |
218 | if (!(p = strchr(*argv, '/'))) |
219 | modlen = strlen(*argv); | |
220 | else | |
221 | modlen = p - *argv; | |
222 | ||
223 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
224 | out_of_memory("start_inband_exchange"); | |
225 | strlcpy(modname, *argv, modlen + 1); | |
226 | modname[modlen] = '/'; | |
227 | modname[modlen+1] = '\0'; | |
228 | ||
2e94e70e WD |
229 | if (!user) |
230 | user = getenv("USER"); | |
231 | if (!user) | |
232 | user = getenv("LOGNAME"); | |
68f40ebb | 233 | |
7909e65f | 234 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 235 | return -1; |
3591c066 | 236 | |
9bcb2595 WD |
237 | /* set daemon_over_rsh to false since we need to build the |
238 | * true set of args passed through the rsh/ssh connection; | |
239 | * this is a no-op for direct-socket-connection mode */ | |
240 | daemon_over_rsh = 0; | |
241 | server_options(sargs, &sargc); | |
242 | ||
7909e65f WD |
243 | if (sargc >= MAX_ARGS - 2) |
244 | goto arg_overflow; | |
245 | ||
9bcb2595 WD |
246 | sargs[sargc++] = "."; |
247 | ||
7909e65f WD |
248 | while (argc > 0) { |
249 | if (sargc >= MAX_ARGS - 1) { | |
250 | arg_overflow: | |
251 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
252 | exit_cleanup(RERR_SYNTAX); | |
253 | } | |
d348d5fd | 254 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
255 | && argv[0][modlen] == '\0') |
256 | sargs[sargc++] = modname; /* we send "modname/" */ | |
257 | else | |
258 | sargs[sargc++] = *argv; | |
259 | argv++; | |
7909e65f WD |
260 | argc--; |
261 | } | |
9bcb2595 WD |
262 | |
263 | sargs[sargc] = NULL; | |
264 | ||
265 | if (verbose > 1) | |
0b515981 | 266 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 267 | |
e844a4a8 | 268 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 269 | |
063393d6 MP |
270 | /* Old servers may just drop the connection here, |
271 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 272 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 273 | |
063393d6 | 274 | while (1) { |
7909e65f | 275 | if (!read_line_old(f_in, line, sizeof line)) { |
be2961da | 276 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
277 | return -1; |
278 | } | |
31593dd6 | 279 | |
31593dd6 | 280 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 281 | auth_client(f_out, user, line+18); |
31593dd6 AT |
282 | continue; |
283 | } | |
31593dd6 | 284 | |
2e94e70e WD |
285 | if (strcmp(line,"@RSYNCD: OK") == 0) |
286 | break; | |
8f04bb36 | 287 | |
cae95647 MP |
288 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
289 | /* This is sent by recent versions of the | |
290 | * server to terminate the listing of modules. | |
291 | * We don't want to go on and transfer | |
292 | * anything; just exit. */ | |
293 | exit(0); | |
294 | } | |
8f04bb36 | 295 | |
136ac7ec | 296 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 297 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
298 | /* This is always fatal; the server will now |
299 | * close the socket. */ | |
180443af | 300 | return -1; |
136ac7ec | 301 | } |
180443af | 302 | |
9ce7fc38 WD |
303 | /* This might be a MOTD line or a module listing, but there is |
304 | * no way to differentiate it. The manpage mentions this. */ | |
305 | if (output_motd) | |
306 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 307 | } |
8dad7fc6 | 308 | kluge_around_eof = 0; |
3591c066 | 309 | |
7909e65f WD |
310 | if (rl_nulls) { |
311 | for (i = 0; i < sargc; i++) { | |
312 | write_sbuf(f_out, sargs[i]); | |
313 | write_byte(f_out, 0); | |
314 | } | |
315 | write_byte(f_out, 0); | |
316 | } else { | |
317 | for (i = 0; i < sargc; i++) | |
318 | io_printf(f_out, "%s\n", sargs[i]); | |
319 | write_sbuf(f_out, "\n"); | |
3591c066 | 320 | } |
3591c066 | 321 | |
daa598df | 322 | if (protocol_version < 23) { |
3f55bd5d | 323 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 324 | io_start_multiplex_in(); |
09b7f5db | 325 | } |
8d9dc9f9 | 326 | |
e844a4a8 WD |
327 | free(modname); |
328 | ||
68f40ebb | 329 | return 0; |
3591c066 AT |
330 | } |
331 | ||
141c6265 WD |
332 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
333 | int argc, char *argv[]) | |
c95ca2a2 | 334 | { |
141c6265 | 335 | int j, status = -1; |
3591c066 | 336 | |
7909e65f WD |
337 | if (!request) |
338 | request = "(NONE)"; | |
141c6265 | 339 | |
7909e65f WD |
340 | write_buf(fd, request, strlen(request)+1); |
341 | for (j = 0; j < argc; j++) | |
342 | write_buf(fd, argv[j], strlen(argv[j])+1); | |
141c6265 WD |
343 | write_byte(fd, 0); |
344 | ||
c95ca2a2 WD |
345 | close(fd); |
346 | ||
347 | if (wait_process(pid, &status, 0) < 0 | |
348 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
349 | char *e; | |
d0236360 WD |
350 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
351 | status, status < 0 ? ": " : "", | |
352 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
353 | out_of_memory("finish_pre_exec"); |
354 | return e; | |
355 | } | |
356 | return NULL; | |
357 | } | |
3591c066 | 358 | |
141c6265 WD |
359 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
360 | { | |
361 | char *bp = buf, *eob = buf + limit - 1; | |
362 | ||
363 | while (1) { | |
62a6b8df WD |
364 | int got = read(fd, bp, 1); |
365 | if (got != 1) { | |
366 | if (got < 0 && errno == EINTR) | |
367 | continue; | |
141c6265 | 368 | return -1; |
62a6b8df | 369 | } |
141c6265 WD |
370 | if (*bp == '\0') |
371 | break; | |
372 | if (bp < eob) | |
373 | bp++; | |
374 | } | |
375 | *bp = '\0'; | |
376 | ||
377 | return bp - buf; | |
378 | } | |
379 | ||
439a198d | 380 | static int rsync_module(int f_in, int f_out, int i, char *addr, char *host) |
3591c066 | 381 | { |
7909e65f | 382 | int argc, opt_cnt; |
2fe1feea | 383 | char **argv, *chroot_path = NULL; |
20accf4d | 384 | char line[BIGPATHBUFLEN]; |
2af27ad9 | 385 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 386 | gid_t gid = (gid_t)-2; |
c95ca2a2 | 387 | char *p, *err_msg = NULL; |
874895d5 | 388 | char *name = lp_name(i); |
8638dd48 | 389 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 WD |
390 | int ret, pre_exec_fd = -1; |
391 | pid_t pre_exec_pid = 0; | |
2e94e70e | 392 | char *request = NULL; |
56c473b7 | 393 | |
15dbffc2 | 394 | #ifdef ICONV_OPTION |
0b52f94d WD |
395 | iconv_opt = lp_charset(i); |
396 | if (*iconv_opt) | |
397 | setup_iconv(); | |
398 | iconv_opt = NULL; | |
399 | #endif | |
400 | ||
56c473b7 | 401 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
1732b6c0 | 402 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 403 | name, host, addr); |
c0422cea WD |
404 | if (!lp_list(i)) |
405 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
406 | else { | |
407 | io_printf(f_out, | |
408 | "@ERROR: access denied to %s from %s (%s)\n", | |
409 | name, host, addr); | |
410 | } | |
56c473b7 AT |
411 | return -1; |
412 | } | |
3591c066 | 413 | |
68f40ebb | 414 | if (am_daemon && am_server) { |
9e5a5ddb | 415 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
416 | name, host, addr); |
417 | } | |
418 | ||
5e71c444 | 419 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 420 | if (errno) { |
1732b6c0 | 421 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 422 | lp_lock_file(i)); |
4875d6b6 | 423 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 424 | } else { |
1732b6c0 | 425 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 426 | lp_max_connections(i)); |
4ccfd96c | 427 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 428 | lp_max_connections(i)); |
8d72ef6e | 429 | } |
0c515f17 AT |
430 | return -1; |
431 | } | |
432 | ||
45c5b903 | 433 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 434 | |
97cb8dc2 | 435 | if (!auth_user) { |
68f40ebb | 436 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 437 | return -1; |
d0d56395 AT |
438 | } |
439 | ||
3591c066 AT |
440 | module_id = i; |
441 | ||
211bc43b | 442 | if (lp_read_only(i)) |
18638730 WD |
443 | read_only = 1; |
444 | ||
10ae3406 | 445 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 446 | logfile_format = lp_log_format(i); |
10ae3406 WD |
447 | if (log_format_has(logfile_format, 'i')) |
448 | logfile_format_has_i = 1; | |
449 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
450 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 451 | |
6fe05820 | 452 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 453 | |
716baed7 DD |
454 | if (am_root) { |
455 | p = lp_uid(i); | |
456 | if (!name_to_uid(p, &uid)) { | |
2dc7b8bd | 457 | if (!isDigit(p)) { |
1732b6c0 | 458 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 459 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 460 | return -1; |
4a7144ee | 461 | } |
716baed7 DD |
462 | uid = atoi(p); |
463 | } | |
464 | ||
465 | p = lp_gid(i); | |
466 | if (!name_to_gid(p, &gid)) { | |
2dc7b8bd | 467 | if (!isDigit(p)) { |
1732b6c0 | 468 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 469 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 470 | return -1; |
4a7144ee | 471 | } |
716baed7 DD |
472 | gid = atoi(p); |
473 | } | |
8ef4ffd6 | 474 | } |
3b2b5345 | 475 | |
4a7144ee WD |
476 | /* TODO: If we're not root, but the configuration requests |
477 | * that we change to some uid other than the current one, then | |
478 | * log a warning. */ | |
479 | ||
480 | /* TODO: Perhaps take a list of gids, and make them into the | |
481 | * supplementary groups. */ | |
8ef4ffd6 | 482 | |
33cbd577 | 483 | module_dir = lp_path(i); |
2fe1feea WD |
484 | if (use_chroot) { |
485 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
486 | *p = '\0'; | |
487 | p += 2; | |
488 | } else if ((p = strdup("/")) == NULL) | |
489 | out_of_memory("rsync_module"); | |
490 | } | |
491 | ||
beef86d0 WD |
492 | /* We do a push_dir() that doesn't actually call chdir() |
493 | * just to make a relative path absolute. */ | |
33cbd577 WD |
494 | strlcpy(line, curr_dir, sizeof line); |
495 | if (!push_dir(module_dir, 1)) | |
496 | goto chdir_failed; | |
2fe1feea WD |
497 | if (strcmp(curr_dir, module_dir) != 0 |
498 | && (module_dir = strdup(curr_dir)) == NULL) | |
499 | out_of_memory("rsync_module"); | |
33cbd577 WD |
500 | push_dir(line, 1); /* Restore curr_dir. */ |
501 | ||
2fe1feea WD |
502 | if (use_chroot) { |
503 | chroot_path = module_dir; | |
504 | module_dir = p; /* p is "/" or our inside-chroot path */ | |
505 | } | |
506 | module_dirlen = clean_fname(module_dir, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR); | |
507 | ||
508 | if (module_dirlen == 1) { | |
e7bf7c01 | 509 | module_dirlen = 0; |
7842418b | 510 | set_filter_dir("/", 1); |
46bffd98 | 511 | } else |
33cbd577 | 512 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
513 | |
514 | p = lp_filter(i); | |
ebfd1a1c | 515 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 516 | XFLG_ABS_IF_SLASH); |
837cbad9 | 517 | |
cd64343a | 518 | p = lp_include_from(i); |
ebfd1a1c | 519 | parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE, |
2c8c8bba | 520 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
521 | |
522 | p = lp_include(i); | |
ebfd1a1c | 523 | parse_rule(&server_filter_list, p, |
0a68f869 | 524 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
2c8c8bba | 525 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
cd64343a | 526 | |
8f3a2d54 | 527 | p = lp_exclude_from(i); |
ebfd1a1c | 528 | parse_filter_file(&server_filter_list, p, 0, |
2c8c8bba | 529 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 530 | |
5805327b | 531 | p = lp_exclude(i); |
ebfd1a1c | 532 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 533 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
8f3a2d54 | 534 | |
6dc9b74b | 535 | log_init(1); |
1a016bfd | 536 | |
9d0d18b5 | 537 | #ifdef HAVE_PUTENV |
c95ca2a2 | 538 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 WD |
539 | char *modname, *modpath, *hostaddr, *hostname, *username; |
540 | int status; | |
2fe1feea WD |
541 | |
542 | if (!use_chroot) | |
543 | p = module_dir; | |
544 | else if (module_dirlen) { | |
545 | pathjoin(line, sizeof line, chroot_path, module_dir+1); | |
546 | p = line; | |
547 | } else | |
548 | p = chroot_path; | |
549 | ||
9d0d18b5 | 550 | if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0 |
2fe1feea | 551 | || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", p) < 0 |
9d0d18b5 WD |
552 | || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0 |
553 | || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0 | |
554 | || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0) | |
555 | out_of_memory("rsync_module"); | |
556 | putenv(modname); | |
557 | putenv(modpath); | |
558 | putenv(hostaddr); | |
559 | putenv(hostname); | |
560 | putenv(username); | |
561 | umask(orig_umask); | |
c95ca2a2 WD |
562 | /* For post-xfer exec, fork a new process to run the rsync |
563 | * daemon while this process waits for the exit status and | |
564 | * runs the indicated command at that point. */ | |
565 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
566 | pid_t pid = fork(); |
567 | if (pid < 0) { | |
568 | rsyserr(FLOG, errno, "fork failed"); | |
569 | io_printf(f_out, "@ERROR: fork failed\n"); | |
570 | return -1; | |
571 | } | |
572 | if (pid) { | |
503114a7 WD |
573 | if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0) |
574 | putenv(p); | |
c95ca2a2 WD |
575 | if (wait_process(pid, &status, 0) < 0) |
576 | status = -1; | |
503114a7 WD |
577 | if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0) |
578 | putenv(p); | |
9d0d18b5 WD |
579 | if (WIFEXITED(status)) |
580 | status = WEXITSTATUS(status); | |
581 | else | |
582 | status = -1; | |
503114a7 WD |
583 | if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0) |
584 | putenv(p); | |
c95ca2a2 | 585 | system(lp_postxfer_exec(i)); |
9d0d18b5 WD |
586 | _exit(status); |
587 | } | |
588 | } | |
c95ca2a2 WD |
589 | /* For pre-xfer exec, fork a child process to run the indicated |
590 | * command, though it first waits for the parent process to | |
591 | * send us the user's request via a pipe. */ | |
592 | if (*lp_prexfer_exec(i)) { | |
593 | int fds[2]; | |
503114a7 WD |
594 | if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0) |
595 | putenv(p); | |
c95ca2a2 WD |
596 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
597 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
598 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
599 | return -1; | |
600 | } | |
601 | if (pre_exec_pid == 0) { | |
141c6265 WD |
602 | char buf[BIGPATHBUFLEN]; |
603 | int j, len; | |
c95ca2a2 WD |
604 | close(fds[1]); |
605 | set_blocking(fds[0]); | |
141c6265 | 606 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
607 | if (len <= 0) |
608 | _exit(1); | |
503114a7 WD |
609 | if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0) |
610 | putenv(p); | |
141c6265 WD |
611 | for (j = 0; ; j++) { |
612 | len = read_arg_from_pipe(fds[0], buf, | |
613 | BIGPATHBUFLEN); | |
614 | if (len <= 0) { | |
615 | if (!len) | |
616 | break; | |
617 | _exit(1); | |
618 | } | |
503114a7 WD |
619 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
620 | putenv(p); | |
141c6265 WD |
621 | } |
622 | close(fds[0]); | |
c95ca2a2 WD |
623 | close(STDIN_FILENO); |
624 | close(STDOUT_FILENO); | |
625 | status = system(lp_prexfer_exec(i)); | |
626 | if (!WIFEXITED(status)) | |
627 | _exit(1); | |
628 | _exit(WEXITSTATUS(status)); | |
629 | } | |
630 | close(fds[0]); | |
631 | set_blocking(fds[1]); | |
632 | pre_exec_fd = fds[1]; | |
633 | } | |
9d0d18b5 WD |
634 | umask(0); |
635 | } | |
636 | #endif | |
637 | ||
8638dd48 | 638 | if (use_chroot) { |
b52c1d9d MP |
639 | /* |
640 | * XXX: The 'use chroot' flag is a fairly reliable | |
641 | * source of confusion, because it fails under two | |
642 | * important circumstances: running as non-root, | |
643 | * running on Win32 (or possibly others). On the | |
644 | * other hand, if you are running as root, then it | |
645 | * might be better to always use chroot. | |
646 | * | |
647 | * So, perhaps if we can't chroot we should just issue | |
648 | * a warning, unless a "require chroot" flag is set, | |
649 | * in which case we fail. | |
650 | */ | |
2fe1feea WD |
651 | if (chroot(chroot_path)) { |
652 | rsyserr(FLOG, errno, "chroot %s failed", chroot_path); | |
68f40ebb | 653 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
654 | return -1; |
655 | } | |
2fe1feea | 656 | if (!push_dir(module_dir, 0)) |
33cbd577 | 657 | goto chdir_failed; |
2fe1feea WD |
658 | if (module_dirlen) |
659 | sanitize_paths = 1; | |
716baed7 | 660 | } else { |
33cbd577 WD |
661 | if (!push_dir(module_dir, 0)) { |
662 | chdir_failed: | |
663 | rsyserr(FLOG, errno, "chdir %s failed\n", module_dir); | |
68f40ebb | 664 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
665 | return -1; |
666 | } | |
cb13abfe | 667 | sanitize_paths = 1; |
716baed7 DD |
668 | } |
669 | ||
9585b276 | 670 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 671 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
672 | if (munge_symlinks) { |
673 | STRUCT_STAT st; | |
674 | if (stat(SYMLINK_PREFIX, &st) == 0 && S_ISDIR(st.st_mode)) { | |
675 | rprintf(FLOG, "Symlink munging is unsupported when a %s directory exists.\n", | |
676 | SYMLINK_PREFIX); | |
677 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); | |
678 | exit_cleanup(RERR_UNSUPPORTED); | |
679 | } | |
680 | } | |
681 | ||
716baed7 | 682 | if (am_root) { |
715d1f45 MP |
683 | /* XXXX: You could argue that if the daemon is started |
684 | * by a non-root user and they explicitly specify a | |
685 | * gid, then we should try to change to that gid -- | |
686 | * this could be possible if it's already in their | |
687 | * supplementary groups. */ | |
688 | ||
689 | /* TODO: Perhaps we need to document that if rsyncd is | |
690 | * started by somebody other than root it will inherit | |
691 | * all their supplementary groups. */ | |
692 | ||
716baed7 | 693 | if (setgid(gid)) { |
1732b6c0 | 694 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 695 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
696 | return -1; |
697 | } | |
4f5b0756 | 698 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
699 | /* Get rid of any supplementary groups this process |
700 | * might have inheristed. */ | |
701 | if (setgroups(1, &gid)) { | |
1732b6c0 | 702 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
703 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
704 | return -1; | |
705 | } | |
706 | #endif | |
3591c066 | 707 | |
716baed7 | 708 | if (setuid(uid)) { |
1732b6c0 | 709 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 710 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
711 | return -1; |
712 | } | |
713 | ||
6fe05820 | 714 | am_root = (MY_UID() == 0); |
3591c066 AT |
715 | } |
716 | ||
fed1f3f4 WD |
717 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
718 | tmpdir = lp_temp_dir(i); | |
719 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
720 | rprintf(FLOG, | |
721 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
722 | name); | |
723 | tmpdir = NULL; | |
724 | } | |
725 | } | |
726 | ||
68f40ebb | 727 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 728 | |
7909e65f | 729 | opt_cnt = read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
3591c066 | 730 | |
141c6265 WD |
731 | if (pre_exec_pid) { |
732 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
7909e65f | 733 | opt_cnt, argv); |
141c6265 | 734 | } |
c95ca2a2 | 735 | |
18638730 | 736 | verbose = 0; /* future verbosity is controlled by client options */ |
c9dc1300 | 737 | ret = parse_arguments(&argc, (const char ***) &argv, 0); |
875a13b4 | 738 | am_server = 1; /* Don't let someone try to be tricky. */ |
3162ea6f WD |
739 | if (lp_ignore_errors(module_id)) |
740 | ignore_errors = 1; | |
5223b786 WD |
741 | if (write_batch < 0) |
742 | dry_run = 1; | |
3591c066 | 743 | |
9439c0cb WD |
744 | if (lp_fake_super(i)) |
745 | am_root = -1; | |
746 | else if (am_root < 0) /* Treat --fake-super from client as --super. */ | |
747 | am_root = 2; | |
748 | ||
7c2a9e76 WD |
749 | if (filesfrom_fd == 0) |
750 | filesfrom_fd = f_in; | |
751 | ||
7b372642 | 752 | if (request) { |
97cb8dc2 | 753 | if (*auth_user) { |
9e5a5ddb WD |
754 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
755 | am_sender ? "on" : "to", | |
97cb8dc2 | 756 | request, auth_user, host, addr); |
d0d56395 | 757 | } else { |
9e5a5ddb WD |
758 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
759 | am_sender ? "on" : "to", | |
d0d56395 AT |
760 | request, host, addr); |
761 | } | |
7b372642 AT |
762 | free(request); |
763 | } | |
764 | ||
15b7b73d | 765 | #ifndef DEBUG |
3591c066 | 766 | /* don't allow the logs to be flooded too fast */ |
59b0e7a8 WD |
767 | if (verbose > lp_max_verbosity(i)) |
768 | verbose = lp_max_verbosity(i); | |
0199b05f | 769 | #endif |
3591c066 | 770 | |
1732b6c0 WD |
771 | if (protocol_version < 23 |
772 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 773 | io_start_multiplex_out(); |
c95ca2a2 | 774 | else if (!ret || err_msg) { |
1732b6c0 WD |
775 | /* We have to get I/O multiplexing started so that we can |
776 | * get the error back to the client. This means getting | |
777 | * the protocol setup finished first in later versions. */ | |
778 | setup_protocol(f_out, f_in); | |
b03c719f WD |
779 | if (!am_sender) { |
780 | /* Since we failed in our option parsing, we may not | |
781 | * have finished parsing that the client sent us a | |
782 | * --files-from option, so look for it manually. | |
783 | * Without this, the socket would be in the wrong | |
784 | * state for the upcoming error message. */ | |
785 | if (!files_from) { | |
786 | int i; | |
787 | for (i = 0; i < argc; i++) { | |
788 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
789 | files_from = ""; | |
790 | break; | |
791 | } | |
792 | } | |
793 | } | |
794 | if (files_from) | |
795 | write_byte(f_out, 0); | |
796 | } | |
da3478b2 | 797 | io_start_multiplex_out(); |
554e0a8d | 798 | } |
15b7b73d | 799 | |
c95ca2a2 WD |
800 | if (!ret || err_msg) { |
801 | if (err_msg) | |
332cf6df | 802 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
803 | else |
804 | option_error(); | |
7e561438 | 805 | msleep(400); |
4a7144ee | 806 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
807 | } |
808 | ||
15dbffc2 | 809 | #ifdef ICONV_OPTION |
0b52f94d WD |
810 | if (!iconv_opt) { |
811 | if (ic_send != (iconv_t)-1) { | |
812 | iconv_close(ic_send); | |
813 | ic_send = (iconv_t)-1; | |
814 | } | |
815 | if (ic_recv != (iconv_t)-1) { | |
816 | iconv_close(ic_recv); | |
817 | ic_recv = (iconv_t)-1; | |
818 | } | |
819 | } | |
15dbffc2 | 820 | #endif |
0b52f94d WD |
821 | |
822 | if (!numeric_ids | |
823 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
824 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
825 | ||
3e6ddb37 WD |
826 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
827 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 828 | |
f041b025 WD |
829 | /* If we have some incoming/outgoing chmod changes, append them to |
830 | * any user-specified changes (making our changes have priority). | |
831 | * We also get a pointer to just our changes so that a receiver | |
832 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
833 | if (am_sender) |
834 | p = lp_outgoing_chmod(i); | |
835 | else | |
836 | p = lp_incoming_chmod(i); | |
8840ec0f | 837 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
838 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
839 | am_sender ? "outgo" : "incom", p); | |
840 | } | |
730df9d2 | 841 | |
c9dc1300 | 842 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
843 | |
844 | return 0; | |
845 | } | |
846 | ||
7a6421fa AT |
847 | /* send a list of available modules to the client. Don't list those |
848 | with "list = False". */ | |
3591c066 AT |
849 | static void send_listing(int fd) |
850 | { | |
851 | int n = lp_numservices(); | |
852 | int i; | |
063393d6 | 853 | |
c0422cea | 854 | for (i = 0; i < n; i++) { |
3591c066 | 855 | if (lp_list(i)) |
4a7144ee | 856 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 857 | } |
8f04bb36 | 858 | |
daa598df | 859 | if (protocol_version >= 25) |
063393d6 | 860 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
861 | } |
862 | ||
68f40ebb | 863 | /* this is called when a connection is established to a client |
3591c066 AT |
864 | and we want to start talking. The setup of the system is done from |
865 | here */ | |
68f40ebb | 866 | int start_daemon(int f_in, int f_out) |
3591c066 | 867 | { |
20accf4d | 868 | char line[1024]; |
7909e65f | 869 | char *addr, *host; |
c0422cea | 870 | int i; |
4cdf25e4 | 871 | |
da3478b2 WD |
872 | io_set_sock_fds(f_in, f_out); |
873 | ||
374c3e12 WD |
874 | /* We must load the config file before calling any function that |
875 | * might cause log-file output to occur. This ensures that the | |
876 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 877 | * (when rsync is run by init and run by a remote shell). */ |
2e94e70e | 878 | if (!lp_load(config_file, 0)) |
65417579 | 879 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 880 | |
374c3e12 WD |
881 | addr = client_addr(f_in); |
882 | host = client_name(f_in); | |
883 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); | |
91d324b4 | 884 | |
68f40ebb WD |
885 | if (!am_server) { |
886 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
34937987 WD |
887 | if (sockopts) |
888 | set_socket_options(f_in, sockopts); | |
889 | else | |
890 | set_socket_options(f_in, lp_socket_options()); | |
68f40ebb WD |
891 | set_nonblocking(f_in); |
892 | } | |
3591c066 | 893 | |
7909e65f | 894 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 895 | return -1; |
91eee594 | 896 | |
c0422cea | 897 | line[0] = 0; |
7909e65f | 898 | if (!read_line_old(f_in, line, sizeof line)) |
c0422cea | 899 | return -1; |
3591c066 | 900 | |
c0422cea | 901 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
902 | rprintf(FLOG, "module-list request from %s (%s)\n", |
903 | host, addr); | |
c0422cea WD |
904 | send_listing(f_out); |
905 | return -1; | |
906 | } | |
3591c066 | 907 | |
c0422cea WD |
908 | if (*line == '#') { |
909 | /* it's some sort of command that I don't understand */ | |
910 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
911 | return -1; | |
912 | } | |
3591c066 | 913 | |
c0422cea | 914 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
915 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
916 | line, host, addr); | |
917 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
918 | return -1; | |
3591c066 AT |
919 | } |
920 | ||
d749eb68 WD |
921 | #ifdef HAVE_SIGACTION |
922 | sigact.sa_flags = SA_NOCLDSTOP; | |
923 | #endif | |
924 | SIGACTION(SIGCHLD, remember_children); | |
925 | ||
439a198d | 926 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
927 | } |
928 | ||
dd589118 | 929 | static void create_pid_file(void) |
a1d2685b WD |
930 | { |
931 | char *pid_file = lp_pid_file(); | |
932 | char pidbuf[16]; | |
dd589118 | 933 | pid_t pid = getpid(); |
a1d2685b WD |
934 | int fd; |
935 | ||
936 | if (!pid_file || !*pid_file) | |
937 | return; | |
938 | ||
939 | cleanup_set_pid(pid); | |
dd589118 | 940 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) { |
a1d2685b | 941 | cleanup_set_pid(0); |
dd589118 | 942 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
943 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
944 | exit_cleanup(RERR_FILEIO); | |
945 | } | |
946 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
947 | write(fd, pidbuf, strlen(pidbuf)); | |
948 | close(fd); | |
949 | } | |
950 | ||
951 | /* Become a daemon, discarding the controlling terminal. */ | |
952 | static void become_daemon(void) | |
3591c066 | 953 | { |
a1d2685b WD |
954 | int i; |
955 | pid_t pid = fork(); | |
956 | ||
957 | if (pid) { | |
dd589118 WD |
958 | if (pid < 0) { |
959 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
960 | exit_cleanup(RERR_FILEIO); | |
961 | } | |
a1d2685b WD |
962 | _exit(0); |
963 | } | |
1a016bfd | 964 | |
dd589118 WD |
965 | create_pid_file(); |
966 | ||
a1d2685b WD |
967 | /* detach from the terminal */ |
968 | #ifdef HAVE_SETSID | |
969 | setsid(); | |
970 | #elif defined TIOCNOTTY | |
971 | i = open("/dev/tty", O_RDWR); | |
972 | if (i >= 0) { | |
973 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
974 | close(i); | |
975 | } | |
976 | #endif | |
977 | /* make sure that stdin, stdout an stderr don't stuff things | |
978 | * up (library functions, for example) */ | |
979 | for (i = 0; i < 3; i++) { | |
980 | close(i); | |
981 | open("/dev/null", O_RDWR); | |
982 | } | |
983 | } | |
984 | ||
985 | int daemon_main(void) | |
986 | { | |
dd589118 WD |
987 | if (!config_file) { |
988 | if (am_server && am_root <= 0) | |
989 | config_file = RSYNCD_USERCONF; | |
990 | else | |
991 | config_file = RSYNCD_SYSCONF; | |
992 | } | |
993 | ||
3591c066 | 994 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
995 | int i; |
996 | ||
997 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
998 | * stderr so that library functions (and getopt) don't |
999 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1000 | for (i = 1; i < 3; i++) { |
4a7144ee | 1001 | close(i); |
41979ff8 AT |
1002 | open("/dev/null", O_RDWR); |
1003 | } | |
3eb38818 | 1004 | |
68f40ebb | 1005 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1006 | } |
1007 | ||
a1d2685b WD |
1008 | if (!lp_load(config_file, 1)) { |
1009 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); | |
65417579 | 1010 | exit_cleanup(RERR_SYNTAX); |
a1d2685b WD |
1011 | } |
1012 | ||
1013 | if (no_detach) | |
dd589118 | 1014 | create_pid_file(); |
a1d2685b WD |
1015 | else |
1016 | become_daemon(); | |
f9e940ef | 1017 | |
0c56b1ad WD |
1018 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1019 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1020 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1021 | bind_address = lp_bind_address(); |
0c56b1ad | 1022 | |
6dc9b74b | 1023 | log_init(0); |
f9e940ef | 1024 | |
9e5a5ddb | 1025 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1026 | RSYNC_VERSION, rsync_port); |
1027 | /* TODO: If listening on a particular address, then show that | |
1028 | * address too. In fact, why not just do inet_ntop on the | |
1029 | * local address??? */ | |
e42c9458 | 1030 | |
8ef4ffd6 AT |
1031 | start_accept_loop(rsync_port, start_daemon); |
1032 | return -1; | |
3591c066 | 1033 | } |