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> | |
d3d07a5e | 6 | * Copyright (C) 2002-2008 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 | |
53936ef9 | 25 | extern int quiet; |
c0814b81 | 26 | extern int verbose; |
5223b786 | 27 | extern int dry_run; |
9ce7fc38 | 28 | extern int output_motd; |
c0814b81 | 29 | extern int list_only; |
6e195fe9 WD |
30 | extern int am_sender; |
31 | extern int am_server; | |
32 | extern int am_daemon; | |
33 | extern int am_root; | |
3591c066 | 34 | extern int rsync_port; |
53936ef9 | 35 | extern int protect_args; |
3162ea6f | 36 | extern int ignore_errors; |
cbbd8e2e | 37 | extern int preserve_xattrs; |
8dad7fc6 | 38 | extern int kluge_around_eof; |
6e195fe9 | 39 | extern int daemon_over_rsh; |
b35d0d8e | 40 | extern int sanitize_paths; |
0b52f94d | 41 | extern int numeric_ids; |
7c2a9e76 | 42 | extern int filesfrom_fd; |
daa598df WD |
43 | extern int remote_protocol; |
44 | extern int protocol_version; | |
6e195fe9 | 45 | extern int io_timeout; |
6e195fe9 | 46 | extern int no_detach; |
5223b786 | 47 | extern int write_batch; |
6e195fe9 | 48 | extern int default_af_hint; |
ecc7623e WD |
49 | extern int logfile_format_has_i; |
50 | extern int logfile_format_has_o_or_i; | |
c5b7aa15 | 51 | extern mode_t orig_umask; |
6e195fe9 | 52 | extern char *bind_address; |
34937987 | 53 | extern char *sockopts; |
6e195fe9 | 54 | extern char *config_file; |
ecc7623e | 55 | extern char *logfile_format; |
bf4679e8 | 56 | extern char *files_from; |
fed1f3f4 | 57 | extern char *tmpdir; |
730df9d2 WD |
58 | extern struct chmod_mode_struct *chmod_modes; |
59 | extern struct filter_list_struct server_filter_list; | |
33cbd577 | 60 | extern char curr_dir[]; |
0b52f94d WD |
61 | #ifdef ICONV_OPTION |
62 | extern char *iconv_opt; | |
63 | extern iconv_t ic_send, ic_recv; | |
64 | #endif | |
6e195fe9 WD |
65 | |
66 | char *auth_user; | |
18638730 | 67 | int read_only = 0; |
211bc43b | 68 | int module_id = -1; |
9585b276 | 69 | int munge_symlinks = 0; |
8840ec0f | 70 | struct chmod_mode_struct *daemon_chmod_modes; |
3591c066 | 71 | |
33cbd577 | 72 | /* module_dirlen is the length of the module_dir string when in daemon |
2fe1feea WD |
73 | * mode and module_dir is not "/"; otherwise 0. (Note that a chroot- |
74 | * enabled module can have a non-"/" module_dir these days.) */ | |
33cbd577 | 75 | char *module_dir = NULL; |
e7bf7c01 WD |
76 | unsigned int module_dirlen = 0; |
77 | ||
7909e65f WD |
78 | static int rl_nulls = 0; |
79 | ||
d749eb68 WD |
80 | #ifdef HAVE_SIGACTION |
81 | static struct sigaction sigact; | |
82 | #endif | |
83 | ||
be2961da | 84 | /** |
bc363ea9 | 85 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
86 | * function for remote-shell connections is do_cmd(). |
87 | * | |
fdf88d75 MP |
88 | * After negotiating which module to use and reading the server's |
89 | * motd, this hands over to client_run(). Telling the server the | |
90 | * module will cause it to chroot/setuid/etc. | |
91 | * | |
92 | * Instead of doing a transfer, the client may at this stage instead | |
93 | * get a listing of remote modules and exit. | |
be2961da MP |
94 | * |
95 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 96 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 97 | **/ |
7909e65f WD |
98 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
99 | int argc, char *argv[]) | |
3591c066 | 100 | { |
68f40ebb | 101 | int fd, ret; |
2e94e70e | 102 | char *p, *user = NULL; |
4a7144ee | 103 | |
1732b6c0 WD |
104 | /* This is redundant with code in start_inband_exchange(), but this |
105 | * short-circuits a problem in the client before we open a socket, | |
106 | * and the extra check won't hurt. */ | |
7909e65f | 107 | if (**remote_argv == '/') { |
1732b6c0 WD |
108 | rprintf(FERROR, |
109 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
110 | return -1; |
111 | } | |
112 | ||
b31c92ed | 113 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
114 | user = host; |
115 | host = p+1; | |
1732b6c0 | 116 | *p = '\0'; |
bcb7e502 AT |
117 | } |
118 | ||
837cbad9 WD |
119 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
120 | default_af_hint); | |
df5cd107 | 121 | if (fd == -1) |
65417579 | 122 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 123 | |
34937987 WD |
124 | set_socket_options(fd, sockopts); |
125 | ||
5b3aa802 WD |
126 | #ifdef ICONV_CONST |
127 | setup_iconv(); | |
128 | #endif | |
129 | ||
7909e65f | 130 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 131 | |
180443af | 132 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
133 | } |
134 | ||
7909e65f WD |
135 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
136 | { | |
137 | int remote_sub = -1; | |
138 | #if SUBPROTOCOL_VERSION != 0 | |
139 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
140 | #else | |
141 | int our_sub = 0; | |
142 | #endif | |
143 | char *motd; | |
144 | ||
145 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
146 | ||
147 | if (!am_client) { | |
148 | motd = lp_motd_file(); | |
149 | if (motd && *motd) { | |
150 | FILE *f = fopen(motd,"r"); | |
151 | while (f && !feof(f)) { | |
152 | int len = fread(buf, 1, bufsiz - 1, f); | |
153 | if (len > 0) | |
154 | write_buf(f_out, buf, len); | |
155 | } | |
156 | if (f) | |
157 | fclose(f); | |
158 | write_sbuf(f_out, "\n"); | |
159 | } | |
160 | } | |
161 | ||
162 | /* This strips the \n. */ | |
163 | if (!read_line_old(f_in, buf, bufsiz)) { | |
164 | if (am_client) | |
165 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
166 | return -1; | |
167 | } | |
168 | ||
169 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
170 | if (am_client) | |
171 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
172 | else | |
173 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
174 | return -1; | |
175 | } | |
176 | ||
177 | if (remote_sub < 0) { | |
178 | if (remote_protocol == 30) { | |
179 | if (am_client) | |
180 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
181 | else | |
182 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
183 | return -1; | |
184 | } | |
185 | remote_sub = 0; | |
186 | } | |
187 | ||
188 | if (protocol_version > remote_protocol) { | |
189 | protocol_version = remote_protocol; | |
190 | if (remote_sub) | |
191 | protocol_version--; | |
192 | } else if (protocol_version == remote_protocol) { | |
193 | if (remote_sub != our_sub) | |
194 | protocol_version--; | |
195 | } | |
196 | #if SUBPROTOCOL_VERSION != 0 | |
197 | else if (protocol_version < remote_protocol) { | |
198 | if (our_sub) | |
199 | protocol_version--; | |
200 | } | |
201 | #endif | |
202 | ||
203 | if (protocol_version >= 30) | |
204 | rl_nulls = 1; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 210 | { |
e844a4a8 | 211 | int i, modlen; |
7909e65f | 212 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
213 | char *sargs[MAX_ARGS]; |
214 | int sargc = 0; | |
e844a4a8 | 215 | char *p, *modname; |
68f40ebb | 216 | |
d4c5cb2b | 217 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 218 | |
e844a4a8 | 219 | if (**argv == '/') { |
1732b6c0 WD |
220 | rprintf(FERROR, |
221 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
222 | return -1; |
223 | } | |
224 | ||
e844a4a8 WD |
225 | if (!(p = strchr(*argv, '/'))) |
226 | modlen = strlen(*argv); | |
227 | else | |
228 | modlen = p - *argv; | |
229 | ||
230 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
231 | out_of_memory("start_inband_exchange"); | |
232 | strlcpy(modname, *argv, modlen + 1); | |
233 | modname[modlen] = '/'; | |
234 | modname[modlen+1] = '\0'; | |
235 | ||
2e94e70e WD |
236 | if (!user) |
237 | user = getenv("USER"); | |
238 | if (!user) | |
239 | user = getenv("LOGNAME"); | |
68f40ebb | 240 | |
7909e65f | 241 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 242 | return -1; |
3591c066 | 243 | |
9bcb2595 WD |
244 | /* set daemon_over_rsh to false since we need to build the |
245 | * true set of args passed through the rsh/ssh connection; | |
246 | * this is a no-op for direct-socket-connection mode */ | |
247 | daemon_over_rsh = 0; | |
248 | server_options(sargs, &sargc); | |
249 | ||
7909e65f WD |
250 | if (sargc >= MAX_ARGS - 2) |
251 | goto arg_overflow; | |
252 | ||
9bcb2595 WD |
253 | sargs[sargc++] = "."; |
254 | ||
7909e65f WD |
255 | while (argc > 0) { |
256 | if (sargc >= MAX_ARGS - 1) { | |
257 | arg_overflow: | |
258 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
259 | exit_cleanup(RERR_SYNTAX); | |
260 | } | |
d348d5fd | 261 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
262 | && argv[0][modlen] == '\0') |
263 | sargs[sargc++] = modname; /* we send "modname/" */ | |
264 | else | |
265 | sargs[sargc++] = *argv; | |
266 | argv++; | |
7909e65f WD |
267 | argc--; |
268 | } | |
9bcb2595 WD |
269 | |
270 | sargs[sargc] = NULL; | |
271 | ||
272 | if (verbose > 1) | |
0b515981 | 273 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 274 | |
e844a4a8 | 275 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 276 | |
063393d6 MP |
277 | /* Old servers may just drop the connection here, |
278 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 279 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 280 | |
063393d6 | 281 | while (1) { |
7909e65f | 282 | if (!read_line_old(f_in, line, sizeof line)) { |
be2961da | 283 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
284 | return -1; |
285 | } | |
31593dd6 | 286 | |
31593dd6 | 287 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 288 | auth_client(f_out, user, line+18); |
31593dd6 AT |
289 | continue; |
290 | } | |
31593dd6 | 291 | |
2e94e70e WD |
292 | if (strcmp(line,"@RSYNCD: OK") == 0) |
293 | break; | |
8f04bb36 | 294 | |
cae95647 MP |
295 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
296 | /* This is sent by recent versions of the | |
297 | * server to terminate the listing of modules. | |
298 | * We don't want to go on and transfer | |
299 | * anything; just exit. */ | |
300 | exit(0); | |
301 | } | |
8f04bb36 | 302 | |
136ac7ec | 303 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 304 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
305 | /* This is always fatal; the server will now |
306 | * close the socket. */ | |
180443af | 307 | return -1; |
136ac7ec | 308 | } |
180443af | 309 | |
9ce7fc38 WD |
310 | /* This might be a MOTD line or a module listing, but there is |
311 | * no way to differentiate it. The manpage mentions this. */ | |
312 | if (output_motd) | |
313 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 314 | } |
8dad7fc6 | 315 | kluge_around_eof = 0; |
3591c066 | 316 | |
7909e65f WD |
317 | if (rl_nulls) { |
318 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
319 | if (!sargs[i]) /* stop at --protect-args NULL */ |
320 | break; | |
7909e65f WD |
321 | write_sbuf(f_out, sargs[i]); |
322 | write_byte(f_out, 0); | |
323 | } | |
324 | write_byte(f_out, 0); | |
325 | } else { | |
326 | for (i = 0; i < sargc; i++) | |
327 | io_printf(f_out, "%s\n", sargs[i]); | |
328 | write_sbuf(f_out, "\n"); | |
3591c066 | 329 | } |
3591c066 | 330 | |
53936ef9 WD |
331 | if (protect_args) |
332 | send_protected_args(f_out, sargs); | |
333 | ||
daa598df | 334 | if (protocol_version < 23) { |
3f55bd5d | 335 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 336 | io_start_multiplex_in(); |
09b7f5db | 337 | } |
8d9dc9f9 | 338 | |
e844a4a8 WD |
339 | free(modname); |
340 | ||
68f40ebb | 341 | return 0; |
3591c066 AT |
342 | } |
343 | ||
141c6265 | 344 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
53936ef9 | 345 | char **early_argv, char **argv) |
c95ca2a2 | 346 | { |
53936ef9 | 347 | int j = 0, status = -1; |
3591c066 | 348 | |
7909e65f WD |
349 | if (!request) |
350 | request = "(NONE)"; | |
141c6265 | 351 | |
7909e65f | 352 | write_buf(fd, request, strlen(request)+1); |
53936ef9 WD |
353 | if (early_argv) { |
354 | for ( ; *early_argv; early_argv++) | |
355 | write_buf(fd, *early_argv, strlen(*early_argv)+1); | |
356 | j = 1; /* Skip arg0 name in argv. */ | |
357 | } | |
358 | for ( ; argv[j]; j++) { | |
7909e65f | 359 | write_buf(fd, argv[j], strlen(argv[j])+1); |
53936ef9 WD |
360 | if (argv[j][0] == '.' && argv[j][1] == '\0') |
361 | break; | |
362 | } | |
141c6265 WD |
363 | write_byte(fd, 0); |
364 | ||
c95ca2a2 WD |
365 | close(fd); |
366 | ||
367 | if (wait_process(pid, &status, 0) < 0 | |
368 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
369 | char *e; | |
d0236360 WD |
370 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
371 | status, status < 0 ? ": " : "", | |
372 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
373 | out_of_memory("finish_pre_exec"); |
374 | return e; | |
375 | } | |
376 | return NULL; | |
377 | } | |
3591c066 | 378 | |
141c6265 WD |
379 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
380 | { | |
381 | char *bp = buf, *eob = buf + limit - 1; | |
382 | ||
383 | while (1) { | |
62a6b8df WD |
384 | int got = read(fd, bp, 1); |
385 | if (got != 1) { | |
386 | if (got < 0 && errno == EINTR) | |
387 | continue; | |
141c6265 | 388 | return -1; |
62a6b8df | 389 | } |
141c6265 WD |
390 | if (*bp == '\0') |
391 | break; | |
392 | if (bp < eob) | |
393 | bp++; | |
394 | } | |
395 | *bp = '\0'; | |
396 | ||
397 | return bp - buf; | |
398 | } | |
399 | ||
439a198d | 400 | static int rsync_module(int f_in, int f_out, int i, char *addr, char *host) |
3591c066 | 401 | { |
53936ef9 WD |
402 | int argc; |
403 | char **argv, **orig_argv, **orig_early_argv, *chroot_path = NULL; | |
20accf4d | 404 | char line[BIGPATHBUFLEN]; |
2af27ad9 | 405 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 406 | gid_t gid = (gid_t)-2; |
c95ca2a2 | 407 | char *p, *err_msg = NULL; |
874895d5 | 408 | char *name = lp_name(i); |
8638dd48 | 409 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 WD |
410 | int ret, pre_exec_fd = -1; |
411 | pid_t pre_exec_pid = 0; | |
2e94e70e | 412 | char *request = NULL; |
56c473b7 | 413 | |
15dbffc2 | 414 | #ifdef ICONV_OPTION |
0b52f94d WD |
415 | iconv_opt = lp_charset(i); |
416 | if (*iconv_opt) | |
417 | setup_iconv(); | |
418 | iconv_opt = NULL; | |
419 | #endif | |
420 | ||
56c473b7 | 421 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
1732b6c0 | 422 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 423 | name, host, addr); |
c0422cea WD |
424 | if (!lp_list(i)) |
425 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
426 | else { | |
427 | io_printf(f_out, | |
428 | "@ERROR: access denied to %s from %s (%s)\n", | |
429 | name, host, addr); | |
430 | } | |
56c473b7 AT |
431 | return -1; |
432 | } | |
3591c066 | 433 | |
68f40ebb | 434 | if (am_daemon && am_server) { |
9e5a5ddb | 435 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
436 | name, host, addr); |
437 | } | |
438 | ||
5e71c444 | 439 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 440 | if (errno) { |
1732b6c0 | 441 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 442 | lp_lock_file(i)); |
4875d6b6 | 443 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 444 | } else { |
1732b6c0 | 445 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 446 | lp_max_connections(i)); |
4ccfd96c | 447 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 448 | lp_max_connections(i)); |
8d72ef6e | 449 | } |
0c515f17 AT |
450 | return -1; |
451 | } | |
452 | ||
45c5b903 | 453 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 454 | |
97cb8dc2 | 455 | if (!auth_user) { |
68f40ebb | 456 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 457 | return -1; |
d0d56395 AT |
458 | } |
459 | ||
3591c066 AT |
460 | module_id = i; |
461 | ||
211bc43b | 462 | if (lp_read_only(i)) |
18638730 WD |
463 | read_only = 1; |
464 | ||
10ae3406 | 465 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 466 | logfile_format = lp_log_format(i); |
10ae3406 WD |
467 | if (log_format_has(logfile_format, 'i')) |
468 | logfile_format_has_i = 1; | |
469 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
470 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 471 | |
6fe05820 | 472 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 473 | |
716baed7 DD |
474 | if (am_root) { |
475 | p = lp_uid(i); | |
476 | if (!name_to_uid(p, &uid)) { | |
2dc7b8bd | 477 | if (!isDigit(p)) { |
1732b6c0 | 478 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 479 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 480 | return -1; |
4a7144ee | 481 | } |
716baed7 DD |
482 | uid = atoi(p); |
483 | } | |
484 | ||
485 | p = lp_gid(i); | |
486 | if (!name_to_gid(p, &gid)) { | |
2dc7b8bd | 487 | if (!isDigit(p)) { |
1732b6c0 | 488 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 489 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 490 | return -1; |
4a7144ee | 491 | } |
716baed7 DD |
492 | gid = atoi(p); |
493 | } | |
8ef4ffd6 | 494 | } |
3b2b5345 | 495 | |
4a7144ee WD |
496 | /* TODO: If we're not root, but the configuration requests |
497 | * that we change to some uid other than the current one, then | |
498 | * log a warning. */ | |
499 | ||
500 | /* TODO: Perhaps take a list of gids, and make them into the | |
501 | * supplementary groups. */ | |
8ef4ffd6 | 502 | |
33cbd577 | 503 | module_dir = lp_path(i); |
2fe1feea WD |
504 | if (use_chroot) { |
505 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
506 | *p = '\0'; | |
507 | p += 2; | |
aa0e6b99 | 508 | } else if ((p = strdup("/")) == NULL) /* MEMORY LEAK */ |
2fe1feea WD |
509 | out_of_memory("rsync_module"); |
510 | } | |
511 | ||
beef86d0 WD |
512 | /* We do a push_dir() that doesn't actually call chdir() |
513 | * just to make a relative path absolute. */ | |
33cbd577 WD |
514 | strlcpy(line, curr_dir, sizeof line); |
515 | if (!push_dir(module_dir, 1)) | |
516 | goto chdir_failed; | |
2fe1feea WD |
517 | if (strcmp(curr_dir, module_dir) != 0 |
518 | && (module_dir = strdup(curr_dir)) == NULL) | |
519 | out_of_memory("rsync_module"); | |
33cbd577 WD |
520 | push_dir(line, 1); /* Restore curr_dir. */ |
521 | ||
2fe1feea WD |
522 | if (use_chroot) { |
523 | chroot_path = module_dir; | |
524 | module_dir = p; /* p is "/" or our inside-chroot path */ | |
525 | } | |
526 | module_dirlen = clean_fname(module_dir, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR); | |
527 | ||
528 | if (module_dirlen == 1) { | |
e7bf7c01 | 529 | module_dirlen = 0; |
7842418b | 530 | set_filter_dir("/", 1); |
46bffd98 | 531 | } else |
33cbd577 | 532 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
533 | |
534 | p = lp_filter(i); | |
ebfd1a1c | 535 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 536 | XFLG_ABS_IF_SLASH); |
837cbad9 | 537 | |
cd64343a | 538 | p = lp_include_from(i); |
ebfd1a1c | 539 | parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE, |
2c8c8bba | 540 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
541 | |
542 | p = lp_include(i); | |
ebfd1a1c | 543 | parse_rule(&server_filter_list, p, |
0a68f869 | 544 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
2c8c8bba | 545 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
cd64343a | 546 | |
8f3a2d54 | 547 | p = lp_exclude_from(i); |
ebfd1a1c | 548 | parse_filter_file(&server_filter_list, p, 0, |
2c8c8bba | 549 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 550 | |
5805327b | 551 | p = lp_exclude(i); |
ebfd1a1c | 552 | parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT, |
2c8c8bba | 553 | XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES); |
8f3a2d54 | 554 | |
6dc9b74b | 555 | log_init(1); |
1a016bfd | 556 | |
9d0d18b5 | 557 | #ifdef HAVE_PUTENV |
c95ca2a2 | 558 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 WD |
559 | char *modname, *modpath, *hostaddr, *hostname, *username; |
560 | int status; | |
2fe1feea WD |
561 | |
562 | if (!use_chroot) | |
563 | p = module_dir; | |
564 | else if (module_dirlen) { | |
565 | pathjoin(line, sizeof line, chroot_path, module_dir+1); | |
566 | p = line; | |
567 | } else | |
568 | p = chroot_path; | |
569 | ||
9d0d18b5 | 570 | if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0 |
2fe1feea | 571 | || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", p) < 0 |
9d0d18b5 WD |
572 | || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0 |
573 | || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0 | |
574 | || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0) | |
575 | out_of_memory("rsync_module"); | |
576 | putenv(modname); | |
577 | putenv(modpath); | |
578 | putenv(hostaddr); | |
579 | putenv(hostname); | |
580 | putenv(username); | |
581 | umask(orig_umask); | |
c95ca2a2 WD |
582 | /* For post-xfer exec, fork a new process to run the rsync |
583 | * daemon while this process waits for the exit status and | |
584 | * runs the indicated command at that point. */ | |
585 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
586 | pid_t pid = fork(); |
587 | if (pid < 0) { | |
588 | rsyserr(FLOG, errno, "fork failed"); | |
589 | io_printf(f_out, "@ERROR: fork failed\n"); | |
590 | return -1; | |
591 | } | |
592 | if (pid) { | |
503114a7 WD |
593 | if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0) |
594 | putenv(p); | |
c95ca2a2 WD |
595 | if (wait_process(pid, &status, 0) < 0) |
596 | status = -1; | |
503114a7 WD |
597 | if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0) |
598 | putenv(p); | |
9d0d18b5 WD |
599 | if (WIFEXITED(status)) |
600 | status = WEXITSTATUS(status); | |
601 | else | |
602 | status = -1; | |
503114a7 WD |
603 | if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0) |
604 | putenv(p); | |
c95ca2a2 | 605 | system(lp_postxfer_exec(i)); |
9d0d18b5 WD |
606 | _exit(status); |
607 | } | |
608 | } | |
c95ca2a2 WD |
609 | /* For pre-xfer exec, fork a child process to run the indicated |
610 | * command, though it first waits for the parent process to | |
611 | * send us the user's request via a pipe. */ | |
612 | if (*lp_prexfer_exec(i)) { | |
613 | int fds[2]; | |
503114a7 WD |
614 | if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0) |
615 | putenv(p); | |
c95ca2a2 WD |
616 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
617 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
618 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
619 | return -1; | |
620 | } | |
621 | if (pre_exec_pid == 0) { | |
141c6265 WD |
622 | char buf[BIGPATHBUFLEN]; |
623 | int j, len; | |
c95ca2a2 WD |
624 | close(fds[1]); |
625 | set_blocking(fds[0]); | |
141c6265 | 626 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
627 | if (len <= 0) |
628 | _exit(1); | |
503114a7 WD |
629 | if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0) |
630 | putenv(p); | |
141c6265 WD |
631 | for (j = 0; ; j++) { |
632 | len = read_arg_from_pipe(fds[0], buf, | |
633 | BIGPATHBUFLEN); | |
634 | if (len <= 0) { | |
635 | if (!len) | |
636 | break; | |
637 | _exit(1); | |
638 | } | |
503114a7 WD |
639 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
640 | putenv(p); | |
141c6265 WD |
641 | } |
642 | close(fds[0]); | |
c95ca2a2 WD |
643 | close(STDIN_FILENO); |
644 | close(STDOUT_FILENO); | |
645 | status = system(lp_prexfer_exec(i)); | |
646 | if (!WIFEXITED(status)) | |
647 | _exit(1); | |
648 | _exit(WEXITSTATUS(status)); | |
649 | } | |
650 | close(fds[0]); | |
651 | set_blocking(fds[1]); | |
652 | pre_exec_fd = fds[1]; | |
653 | } | |
9d0d18b5 WD |
654 | umask(0); |
655 | } | |
656 | #endif | |
657 | ||
8638dd48 | 658 | if (use_chroot) { |
b52c1d9d MP |
659 | /* |
660 | * XXX: The 'use chroot' flag is a fairly reliable | |
661 | * source of confusion, because it fails under two | |
662 | * important circumstances: running as non-root, | |
663 | * running on Win32 (or possibly others). On the | |
664 | * other hand, if you are running as root, then it | |
665 | * might be better to always use chroot. | |
666 | * | |
667 | * So, perhaps if we can't chroot we should just issue | |
668 | * a warning, unless a "require chroot" flag is set, | |
669 | * in which case we fail. | |
670 | */ | |
2fe1feea WD |
671 | if (chroot(chroot_path)) { |
672 | rsyserr(FLOG, errno, "chroot %s failed", chroot_path); | |
68f40ebb | 673 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
674 | return -1; |
675 | } | |
2fe1feea | 676 | if (!push_dir(module_dir, 0)) |
33cbd577 | 677 | goto chdir_failed; |
2fe1feea WD |
678 | if (module_dirlen) |
679 | sanitize_paths = 1; | |
716baed7 | 680 | } else { |
33cbd577 WD |
681 | if (!push_dir(module_dir, 0)) { |
682 | chdir_failed: | |
683 | rsyserr(FLOG, errno, "chdir %s failed\n", module_dir); | |
68f40ebb | 684 | io_printf(f_out, "@ERROR: chdir failed\n"); |
716baed7 DD |
685 | return -1; |
686 | } | |
cb13abfe | 687 | sanitize_paths = 1; |
716baed7 DD |
688 | } |
689 | ||
9585b276 | 690 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 691 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
692 | if (munge_symlinks) { |
693 | STRUCT_STAT st; | |
18f3cb69 | 694 | if (do_stat(SYMLINK_PREFIX, &st) == 0 && S_ISDIR(st.st_mode)) { |
9585b276 WD |
695 | rprintf(FLOG, "Symlink munging is unsupported when a %s directory exists.\n", |
696 | SYMLINK_PREFIX); | |
697 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); | |
698 | exit_cleanup(RERR_UNSUPPORTED); | |
699 | } | |
700 | } | |
701 | ||
716baed7 | 702 | if (am_root) { |
715d1f45 MP |
703 | /* XXXX: You could argue that if the daemon is started |
704 | * by a non-root user and they explicitly specify a | |
705 | * gid, then we should try to change to that gid -- | |
706 | * this could be possible if it's already in their | |
707 | * supplementary groups. */ | |
708 | ||
709 | /* TODO: Perhaps we need to document that if rsyncd is | |
710 | * started by somebody other than root it will inherit | |
711 | * all their supplementary groups. */ | |
712 | ||
716baed7 | 713 | if (setgid(gid)) { |
1732b6c0 | 714 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 715 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
716 | return -1; |
717 | } | |
4f5b0756 | 718 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
719 | /* Get rid of any supplementary groups this process |
720 | * might have inheristed. */ | |
721 | if (setgroups(1, &gid)) { | |
1732b6c0 | 722 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
723 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
724 | return -1; | |
725 | } | |
726 | #endif | |
3591c066 | 727 | |
716baed7 | 728 | if (setuid(uid)) { |
1732b6c0 | 729 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 730 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
731 | return -1; |
732 | } | |
733 | ||
6fe05820 | 734 | am_root = (MY_UID() == 0); |
3591c066 AT |
735 | } |
736 | ||
fed1f3f4 WD |
737 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
738 | tmpdir = lp_temp_dir(i); | |
739 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
740 | rprintf(FLOG, | |
741 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
742 | name); | |
743 | tmpdir = NULL; | |
744 | } | |
745 | } | |
746 | ||
68f40ebb | 747 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 748 | |
53936ef9 WD |
749 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
750 | orig_argv = argv; | |
751 | ||
752 | verbose = 0; /* future verbosity is controlled by client options */ | |
753 | ret = parse_arguments(&argc, (const char ***) &argv); | |
754 | if (protect_args && ret) { | |
755 | orig_early_argv = orig_argv; | |
756 | protect_args = 2; | |
757 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
758 | orig_argv = argv; | |
759 | ret = parse_arguments(&argc, (const char ***) &argv); | |
760 | } else | |
761 | orig_early_argv = NULL; | |
3591c066 | 762 | |
141c6265 WD |
763 | if (pre_exec_pid) { |
764 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
53936ef9 | 765 | orig_early_argv, orig_argv); |
141c6265 | 766 | } |
c95ca2a2 | 767 | |
53936ef9 WD |
768 | if (orig_early_argv) |
769 | free(orig_early_argv); | |
770 | ||
875a13b4 | 771 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 772 | quiet = 0; |
3162ea6f WD |
773 | if (lp_ignore_errors(module_id)) |
774 | ignore_errors = 1; | |
5223b786 WD |
775 | if (write_batch < 0) |
776 | dry_run = 1; | |
3591c066 | 777 | |
cbbd8e2e WD |
778 | if (lp_fake_super(i)) { |
779 | if (preserve_xattrs > 1) | |
780 | preserve_xattrs = 1; | |
9439c0cb | 781 | am_root = -1; |
cbbd8e2e | 782 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
783 | am_root = 2; |
784 | ||
7c2a9e76 WD |
785 | if (filesfrom_fd == 0) |
786 | filesfrom_fd = f_in; | |
787 | ||
7b372642 | 788 | if (request) { |
97cb8dc2 | 789 | if (*auth_user) { |
9e5a5ddb WD |
790 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
791 | am_sender ? "on" : "to", | |
97cb8dc2 | 792 | request, auth_user, host, addr); |
d0d56395 | 793 | } else { |
9e5a5ddb WD |
794 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
795 | am_sender ? "on" : "to", | |
d0d56395 AT |
796 | request, host, addr); |
797 | } | |
7b372642 AT |
798 | free(request); |
799 | } | |
800 | ||
15b7b73d | 801 | #ifndef DEBUG |
3591c066 | 802 | /* don't allow the logs to be flooded too fast */ |
59b0e7a8 WD |
803 | if (verbose > lp_max_verbosity(i)) |
804 | verbose = lp_max_verbosity(i); | |
0199b05f | 805 | #endif |
3591c066 | 806 | |
1732b6c0 WD |
807 | if (protocol_version < 23 |
808 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 809 | io_start_multiplex_out(); |
c95ca2a2 | 810 | else if (!ret || err_msg) { |
1732b6c0 WD |
811 | /* We have to get I/O multiplexing started so that we can |
812 | * get the error back to the client. This means getting | |
813 | * the protocol setup finished first in later versions. */ | |
814 | setup_protocol(f_out, f_in); | |
b03c719f WD |
815 | if (!am_sender) { |
816 | /* Since we failed in our option parsing, we may not | |
817 | * have finished parsing that the client sent us a | |
818 | * --files-from option, so look for it manually. | |
819 | * Without this, the socket would be in the wrong | |
820 | * state for the upcoming error message. */ | |
821 | if (!files_from) { | |
822 | int i; | |
823 | for (i = 0; i < argc; i++) { | |
824 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
825 | files_from = ""; | |
826 | break; | |
827 | } | |
828 | } | |
829 | } | |
830 | if (files_from) | |
831 | write_byte(f_out, 0); | |
832 | } | |
da3478b2 | 833 | io_start_multiplex_out(); |
554e0a8d | 834 | } |
15b7b73d | 835 | |
c95ca2a2 WD |
836 | if (!ret || err_msg) { |
837 | if (err_msg) | |
332cf6df | 838 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
839 | else |
840 | option_error(); | |
7e561438 | 841 | msleep(400); |
4a7144ee | 842 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
843 | } |
844 | ||
15dbffc2 | 845 | #ifdef ICONV_OPTION |
0b52f94d WD |
846 | if (!iconv_opt) { |
847 | if (ic_send != (iconv_t)-1) { | |
848 | iconv_close(ic_send); | |
849 | ic_send = (iconv_t)-1; | |
850 | } | |
851 | if (ic_recv != (iconv_t)-1) { | |
852 | iconv_close(ic_recv); | |
853 | ic_recv = (iconv_t)-1; | |
854 | } | |
855 | } | |
15dbffc2 | 856 | #endif |
0b52f94d WD |
857 | |
858 | if (!numeric_ids | |
859 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
860 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
861 | ||
3e6ddb37 WD |
862 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
863 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 864 | |
f041b025 WD |
865 | /* If we have some incoming/outgoing chmod changes, append them to |
866 | * any user-specified changes (making our changes have priority). | |
867 | * We also get a pointer to just our changes so that a receiver | |
868 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
869 | if (am_sender) |
870 | p = lp_outgoing_chmod(i); | |
871 | else | |
872 | p = lp_incoming_chmod(i); | |
8840ec0f | 873 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
874 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
875 | am_sender ? "outgo" : "incom", p); | |
876 | } | |
730df9d2 | 877 | |
c9dc1300 | 878 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
879 | |
880 | return 0; | |
881 | } | |
882 | ||
7a6421fa AT |
883 | /* send a list of available modules to the client. Don't list those |
884 | with "list = False". */ | |
3591c066 AT |
885 | static void send_listing(int fd) |
886 | { | |
887 | int n = lp_numservices(); | |
888 | int i; | |
063393d6 | 889 | |
c0422cea | 890 | for (i = 0; i < n; i++) { |
3591c066 | 891 | if (lp_list(i)) |
4a7144ee | 892 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 893 | } |
8f04bb36 | 894 | |
daa598df | 895 | if (protocol_version >= 25) |
063393d6 | 896 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
897 | } |
898 | ||
d1c06c21 WD |
899 | static int load_config(int globals_only) |
900 | { | |
901 | if (!config_file) { | |
902 | if (am_server && am_root <= 0) | |
903 | config_file = RSYNCD_USERCONF; | |
904 | else | |
905 | config_file = RSYNCD_SYSCONF; | |
906 | } | |
907 | return lp_load(config_file, globals_only); | |
908 | } | |
909 | ||
68f40ebb | 910 | /* this is called when a connection is established to a client |
3591c066 AT |
911 | and we want to start talking. The setup of the system is done from |
912 | here */ | |
68f40ebb | 913 | int start_daemon(int f_in, int f_out) |
3591c066 | 914 | { |
20accf4d | 915 | char line[1024]; |
7909e65f | 916 | char *addr, *host; |
c0422cea | 917 | int i; |
4cdf25e4 | 918 | |
da3478b2 WD |
919 | io_set_sock_fds(f_in, f_out); |
920 | ||
374c3e12 WD |
921 | /* We must load the config file before calling any function that |
922 | * might cause log-file output to occur. This ensures that the | |
923 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 924 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 925 | if (!load_config(0)) |
65417579 | 926 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 927 | |
374c3e12 WD |
928 | addr = client_addr(f_in); |
929 | host = client_name(f_in); | |
930 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); | |
91d324b4 | 931 | |
68f40ebb WD |
932 | if (!am_server) { |
933 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
34937987 WD |
934 | if (sockopts) |
935 | set_socket_options(f_in, sockopts); | |
936 | else | |
937 | set_socket_options(f_in, lp_socket_options()); | |
68f40ebb WD |
938 | set_nonblocking(f_in); |
939 | } | |
3591c066 | 940 | |
7909e65f | 941 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 942 | return -1; |
91eee594 | 943 | |
c0422cea | 944 | line[0] = 0; |
7909e65f | 945 | if (!read_line_old(f_in, line, sizeof line)) |
c0422cea | 946 | return -1; |
3591c066 | 947 | |
c0422cea | 948 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
949 | rprintf(FLOG, "module-list request from %s (%s)\n", |
950 | host, addr); | |
c0422cea WD |
951 | send_listing(f_out); |
952 | return -1; | |
953 | } | |
3591c066 | 954 | |
c0422cea WD |
955 | if (*line == '#') { |
956 | /* it's some sort of command that I don't understand */ | |
957 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
958 | return -1; | |
959 | } | |
3591c066 | 960 | |
c0422cea | 961 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
962 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
963 | line, host, addr); | |
964 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
965 | return -1; | |
3591c066 AT |
966 | } |
967 | ||
d749eb68 WD |
968 | #ifdef HAVE_SIGACTION |
969 | sigact.sa_flags = SA_NOCLDSTOP; | |
970 | #endif | |
971 | SIGACTION(SIGCHLD, remember_children); | |
972 | ||
439a198d | 973 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
974 | } |
975 | ||
dd589118 | 976 | static void create_pid_file(void) |
a1d2685b WD |
977 | { |
978 | char *pid_file = lp_pid_file(); | |
979 | char pidbuf[16]; | |
dd589118 | 980 | pid_t pid = getpid(); |
a1d2685b WD |
981 | int fd; |
982 | ||
983 | if (!pid_file || !*pid_file) | |
984 | return; | |
985 | ||
986 | cleanup_set_pid(pid); | |
dd589118 | 987 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) { |
a1d2685b | 988 | cleanup_set_pid(0); |
dd589118 | 989 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
990 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
991 | exit_cleanup(RERR_FILEIO); | |
992 | } | |
993 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
994 | write(fd, pidbuf, strlen(pidbuf)); | |
995 | close(fd); | |
996 | } | |
997 | ||
998 | /* Become a daemon, discarding the controlling terminal. */ | |
999 | static void become_daemon(void) | |
3591c066 | 1000 | { |
a1d2685b WD |
1001 | int i; |
1002 | pid_t pid = fork(); | |
1003 | ||
1004 | if (pid) { | |
dd589118 WD |
1005 | if (pid < 0) { |
1006 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1007 | exit_cleanup(RERR_FILEIO); | |
1008 | } | |
a1d2685b WD |
1009 | _exit(0); |
1010 | } | |
1a016bfd | 1011 | |
dd589118 WD |
1012 | create_pid_file(); |
1013 | ||
a1d2685b WD |
1014 | /* detach from the terminal */ |
1015 | #ifdef HAVE_SETSID | |
1016 | setsid(); | |
1017 | #elif defined TIOCNOTTY | |
1018 | i = open("/dev/tty", O_RDWR); | |
1019 | if (i >= 0) { | |
1020 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1021 | close(i); | |
1022 | } | |
1023 | #endif | |
1024 | /* make sure that stdin, stdout an stderr don't stuff things | |
1025 | * up (library functions, for example) */ | |
1026 | for (i = 0; i < 3; i++) { | |
1027 | close(i); | |
1028 | open("/dev/null", O_RDWR); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | int daemon_main(void) | |
1033 | { | |
3591c066 | 1034 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1035 | int i; |
1036 | ||
1037 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1038 | * stderr so that library functions (and getopt) don't |
1039 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1040 | for (i = 1; i < 3; i++) { |
4a7144ee | 1041 | close(i); |
41979ff8 AT |
1042 | open("/dev/null", O_RDWR); |
1043 | } | |
3eb38818 | 1044 | |
68f40ebb | 1045 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1046 | } |
1047 | ||
d1c06c21 | 1048 | if (!load_config(1)) { |
a1d2685b | 1049 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1050 | exit_cleanup(RERR_SYNTAX); |
a1d2685b WD |
1051 | } |
1052 | ||
1053 | if (no_detach) | |
dd589118 | 1054 | create_pid_file(); |
a1d2685b WD |
1055 | else |
1056 | become_daemon(); | |
f9e940ef | 1057 | |
0c56b1ad WD |
1058 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1059 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1060 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1061 | bind_address = lp_bind_address(); |
0c56b1ad | 1062 | |
6dc9b74b | 1063 | log_init(0); |
f9e940ef | 1064 | |
9e5a5ddb | 1065 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1066 | RSYNC_VERSION, rsync_port); |
1067 | /* TODO: If listening on a particular address, then show that | |
1068 | * address too. In fact, why not just do inet_ntop on the | |
1069 | * local address??? */ | |
e42c9458 | 1070 | |
8ef4ffd6 AT |
1071 | start_accept_loop(rsync_port, start_daemon); |
1072 | return -1; | |
3591c066 | 1073 | } |