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" |
5dd14f0c | 23 | #include "itypes.h" |
3591c066 | 24 | |
53936ef9 | 25 | extern int quiet; |
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; |
53936ef9 | 34 | extern int protect_args; |
3162ea6f | 35 | extern int ignore_errors; |
cbbd8e2e | 36 | extern int preserve_xattrs; |
8dad7fc6 | 37 | extern int kluge_around_eof; |
6e195fe9 | 38 | extern int daemon_over_rsh; |
41adbcec | 39 | extern int munge_symlinks; |
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; |
6e195fe9 | 53 | extern char *config_file; |
ecc7623e | 54 | extern char *logfile_format; |
bf4679e8 | 55 | extern char *files_from; |
fed1f3f4 | 56 | extern char *tmpdir; |
730df9d2 | 57 | extern struct chmod_mode_struct *chmod_modes; |
819bfe45 | 58 | extern struct filter_list_struct daemon_filter_list; |
b791d680 | 59 | extern char curr_dir[MAXPATHLEN]; |
0b52f94d WD |
60 | #ifdef ICONV_OPTION |
61 | extern char *iconv_opt; | |
62 | extern iconv_t ic_send, ic_recv; | |
63 | #endif | |
6e195fe9 WD |
64 | |
65 | char *auth_user; | |
18638730 | 66 | int read_only = 0; |
211bc43b | 67 | int module_id = -1; |
8840ec0f | 68 | struct chmod_mode_struct *daemon_chmod_modes; |
3591c066 | 69 | |
33cbd577 | 70 | /* module_dirlen is the length of the module_dir string when in daemon |
2fe1feea WD |
71 | * mode and module_dir is not "/"; otherwise 0. (Note that a chroot- |
72 | * enabled module can have a non-"/" module_dir these days.) */ | |
33cbd577 | 73 | char *module_dir = NULL; |
e7bf7c01 WD |
74 | unsigned int module_dirlen = 0; |
75 | ||
7909e65f WD |
76 | static int rl_nulls = 0; |
77 | ||
d749eb68 WD |
78 | #ifdef HAVE_SIGACTION |
79 | static struct sigaction sigact; | |
80 | #endif | |
81 | ||
be2961da | 82 | /** |
bc363ea9 | 83 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
84 | * function for remote-shell connections is do_cmd(). |
85 | * | |
fdf88d75 MP |
86 | * After negotiating which module to use and reading the server's |
87 | * motd, this hands over to client_run(). Telling the server the | |
88 | * module will cause it to chroot/setuid/etc. | |
89 | * | |
90 | * Instead of doing a transfer, the client may at this stage instead | |
91 | * get a listing of remote modules and exit. | |
be2961da MP |
92 | * |
93 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 94 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 95 | **/ |
7909e65f WD |
96 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
97 | int argc, char *argv[]) | |
3591c066 | 98 | { |
68f40ebb | 99 | int fd, ret; |
2e94e70e | 100 | char *p, *user = NULL; |
4a7144ee | 101 | |
1732b6c0 WD |
102 | /* This is redundant with code in start_inband_exchange(), but this |
103 | * short-circuits a problem in the client before we open a socket, | |
104 | * and the extra check won't hurt. */ | |
7909e65f | 105 | if (**remote_argv == '/') { |
1732b6c0 WD |
106 | rprintf(FERROR, |
107 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
108 | return -1; |
109 | } | |
110 | ||
b31c92ed | 111 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
112 | user = host; |
113 | host = p+1; | |
1732b6c0 | 114 | *p = '\0'; |
bcb7e502 AT |
115 | } |
116 | ||
837cbad9 WD |
117 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
118 | default_af_hint); | |
df5cd107 | 119 | if (fd == -1) |
65417579 | 120 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 121 | |
5b3aa802 WD |
122 | #ifdef ICONV_CONST |
123 | setup_iconv(); | |
124 | #endif | |
125 | ||
7909e65f | 126 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 127 | |
180443af | 128 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
129 | } |
130 | ||
7909e65f WD |
131 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
132 | { | |
133 | int remote_sub = -1; | |
134 | #if SUBPROTOCOL_VERSION != 0 | |
135 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
136 | #else | |
137 | int our_sub = 0; | |
138 | #endif | |
139 | char *motd; | |
140 | ||
141 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
142 | ||
143 | if (!am_client) { | |
144 | motd = lp_motd_file(); | |
145 | if (motd && *motd) { | |
146 | FILE *f = fopen(motd,"r"); | |
147 | while (f && !feof(f)) { | |
148 | int len = fread(buf, 1, bufsiz - 1, f); | |
149 | if (len > 0) | |
150 | write_buf(f_out, buf, len); | |
151 | } | |
152 | if (f) | |
153 | fclose(f); | |
154 | write_sbuf(f_out, "\n"); | |
155 | } | |
156 | } | |
157 | ||
158 | /* This strips the \n. */ | |
159 | if (!read_line_old(f_in, buf, bufsiz)) { | |
160 | if (am_client) | |
161 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
162 | return -1; | |
163 | } | |
164 | ||
165 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
166 | if (am_client) | |
167 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
168 | else | |
169 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
170 | return -1; | |
171 | } | |
172 | ||
173 | if (remote_sub < 0) { | |
174 | if (remote_protocol == 30) { | |
175 | if (am_client) | |
176 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
177 | else | |
178 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
179 | return -1; | |
180 | } | |
181 | remote_sub = 0; | |
182 | } | |
183 | ||
184 | if (protocol_version > remote_protocol) { | |
185 | protocol_version = remote_protocol; | |
186 | if (remote_sub) | |
187 | protocol_version--; | |
188 | } else if (protocol_version == remote_protocol) { | |
189 | if (remote_sub != our_sub) | |
190 | protocol_version--; | |
191 | } | |
192 | #if SUBPROTOCOL_VERSION != 0 | |
193 | else if (protocol_version < remote_protocol) { | |
194 | if (our_sub) | |
195 | protocol_version--; | |
196 | } | |
197 | #endif | |
198 | ||
199 | if (protocol_version >= 30) | |
200 | rl_nulls = 1; | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 206 | { |
e844a4a8 | 207 | int i, modlen; |
7909e65f | 208 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
209 | char *sargs[MAX_ARGS]; |
210 | int sargc = 0; | |
e844a4a8 | 211 | char *p, *modname; |
68f40ebb | 212 | |
d4c5cb2b | 213 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 214 | |
e844a4a8 | 215 | if (**argv == '/') { |
1732b6c0 WD |
216 | rprintf(FERROR, |
217 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
218 | return -1; |
219 | } | |
220 | ||
e844a4a8 WD |
221 | if (!(p = strchr(*argv, '/'))) |
222 | modlen = strlen(*argv); | |
223 | else | |
224 | modlen = p - *argv; | |
225 | ||
226 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
227 | out_of_memory("start_inband_exchange"); | |
228 | strlcpy(modname, *argv, modlen + 1); | |
229 | modname[modlen] = '/'; | |
230 | modname[modlen+1] = '\0'; | |
231 | ||
2e94e70e WD |
232 | if (!user) |
233 | user = getenv("USER"); | |
234 | if (!user) | |
235 | user = getenv("LOGNAME"); | |
68f40ebb | 236 | |
7909e65f | 237 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 238 | return -1; |
3591c066 | 239 | |
9bcb2595 WD |
240 | /* set daemon_over_rsh to false since we need to build the |
241 | * true set of args passed through the rsh/ssh connection; | |
242 | * this is a no-op for direct-socket-connection mode */ | |
243 | daemon_over_rsh = 0; | |
244 | server_options(sargs, &sargc); | |
245 | ||
7909e65f WD |
246 | if (sargc >= MAX_ARGS - 2) |
247 | goto arg_overflow; | |
248 | ||
9bcb2595 WD |
249 | sargs[sargc++] = "."; |
250 | ||
7909e65f WD |
251 | while (argc > 0) { |
252 | if (sargc >= MAX_ARGS - 1) { | |
253 | arg_overflow: | |
254 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
255 | exit_cleanup(RERR_SYNTAX); | |
256 | } | |
d348d5fd | 257 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
258 | && argv[0][modlen] == '\0') |
259 | sargs[sargc++] = modname; /* we send "modname/" */ | |
260 | else | |
261 | sargs[sargc++] = *argv; | |
262 | argv++; | |
7909e65f WD |
263 | argc--; |
264 | } | |
9bcb2595 WD |
265 | |
266 | sargs[sargc] = NULL; | |
267 | ||
951e826b | 268 | if (DEBUG_GTE(CMD, 1)) |
0b515981 | 269 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 270 | |
e844a4a8 | 271 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 272 | |
063393d6 MP |
273 | /* Old servers may just drop the connection here, |
274 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 275 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 276 | |
063393d6 | 277 | while (1) { |
7909e65f | 278 | if (!read_line_old(f_in, line, sizeof line)) { |
be2961da | 279 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
280 | return -1; |
281 | } | |
31593dd6 | 282 | |
31593dd6 | 283 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 284 | auth_client(f_out, user, line+18); |
31593dd6 AT |
285 | continue; |
286 | } | |
31593dd6 | 287 | |
2e94e70e WD |
288 | if (strcmp(line,"@RSYNCD: OK") == 0) |
289 | break; | |
8f04bb36 | 290 | |
cae95647 MP |
291 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
292 | /* This is sent by recent versions of the | |
293 | * server to terminate the listing of modules. | |
294 | * We don't want to go on and transfer | |
295 | * anything; just exit. */ | |
296 | exit(0); | |
297 | } | |
8f04bb36 | 298 | |
136ac7ec | 299 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 300 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
301 | /* This is always fatal; the server will now |
302 | * close the socket. */ | |
180443af | 303 | return -1; |
136ac7ec | 304 | } |
180443af | 305 | |
9ce7fc38 WD |
306 | /* This might be a MOTD line or a module listing, but there is |
307 | * no way to differentiate it. The manpage mentions this. */ | |
308 | if (output_motd) | |
309 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 310 | } |
8dad7fc6 | 311 | kluge_around_eof = 0; |
3591c066 | 312 | |
7909e65f WD |
313 | if (rl_nulls) { |
314 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
315 | if (!sargs[i]) /* stop at --protect-args NULL */ |
316 | break; | |
7909e65f WD |
317 | write_sbuf(f_out, sargs[i]); |
318 | write_byte(f_out, 0); | |
319 | } | |
320 | write_byte(f_out, 0); | |
321 | } else { | |
322 | for (i = 0; i < sargc; i++) | |
323 | io_printf(f_out, "%s\n", sargs[i]); | |
324 | write_sbuf(f_out, "\n"); | |
3591c066 | 325 | } |
3591c066 | 326 | |
53936ef9 WD |
327 | if (protect_args) |
328 | send_protected_args(f_out, sargs); | |
329 | ||
daa598df | 330 | if (protocol_version < 23) { |
3f55bd5d | 331 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 332 | io_start_multiplex_in(); |
09b7f5db | 333 | } |
8d9dc9f9 | 334 | |
e844a4a8 WD |
335 | free(modname); |
336 | ||
68f40ebb | 337 | return 0; |
3591c066 AT |
338 | } |
339 | ||
141c6265 | 340 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
53936ef9 | 341 | char **early_argv, char **argv) |
c95ca2a2 | 342 | { |
53936ef9 | 343 | int j = 0, status = -1; |
3591c066 | 344 | |
7909e65f WD |
345 | if (!request) |
346 | request = "(NONE)"; | |
141c6265 | 347 | |
7909e65f | 348 | write_buf(fd, request, strlen(request)+1); |
53936ef9 WD |
349 | if (early_argv) { |
350 | for ( ; *early_argv; early_argv++) | |
351 | write_buf(fd, *early_argv, strlen(*early_argv)+1); | |
352 | j = 1; /* Skip arg0 name in argv. */ | |
353 | } | |
354 | for ( ; argv[j]; j++) { | |
7909e65f | 355 | write_buf(fd, argv[j], strlen(argv[j])+1); |
53936ef9 WD |
356 | if (argv[j][0] == '.' && argv[j][1] == '\0') |
357 | break; | |
358 | } | |
141c6265 WD |
359 | write_byte(fd, 0); |
360 | ||
c95ca2a2 WD |
361 | close(fd); |
362 | ||
363 | if (wait_process(pid, &status, 0) < 0 | |
364 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
365 | char *e; | |
d0236360 WD |
366 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
367 | status, status < 0 ? ": " : "", | |
368 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
369 | out_of_memory("finish_pre_exec"); |
370 | return e; | |
371 | } | |
372 | return NULL; | |
373 | } | |
3591c066 | 374 | |
141c6265 WD |
375 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
376 | { | |
377 | char *bp = buf, *eob = buf + limit - 1; | |
378 | ||
379 | while (1) { | |
62a6b8df WD |
380 | int got = read(fd, bp, 1); |
381 | if (got != 1) { | |
382 | if (got < 0 && errno == EINTR) | |
383 | continue; | |
141c6265 | 384 | return -1; |
62a6b8df | 385 | } |
141c6265 WD |
386 | if (*bp == '\0') |
387 | break; | |
388 | if (bp < eob) | |
389 | bp++; | |
390 | } | |
391 | *bp = '\0'; | |
392 | ||
393 | return bp - buf; | |
394 | } | |
395 | ||
439a198d | 396 | static int rsync_module(int f_in, int f_out, int i, char *addr, char *host) |
3591c066 | 397 | { |
53936ef9 | 398 | int argc; |
433c6753 | 399 | char **argv, **orig_argv, **orig_early_argv, *module_chdir; |
20accf4d | 400 | char line[BIGPATHBUFLEN]; |
2af27ad9 | 401 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
1a016bfd | 402 | gid_t gid = (gid_t)-2; |
c95ca2a2 | 403 | char *p, *err_msg = NULL; |
874895d5 | 404 | char *name = lp_name(i); |
8638dd48 | 405 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 | 406 | int ret, pre_exec_fd = -1; |
41adbcec | 407 | int save_munge_symlinks; |
c95ca2a2 | 408 | pid_t pre_exec_pid = 0; |
2e94e70e | 409 | char *request = NULL; |
56c473b7 | 410 | |
15dbffc2 | 411 | #ifdef ICONV_OPTION |
0b52f94d WD |
412 | iconv_opt = lp_charset(i); |
413 | if (*iconv_opt) | |
414 | setup_iconv(); | |
415 | iconv_opt = NULL; | |
416 | #endif | |
417 | ||
56c473b7 | 418 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
1732b6c0 | 419 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 420 | name, host, addr); |
c0422cea WD |
421 | if (!lp_list(i)) |
422 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
423 | else { | |
424 | io_printf(f_out, | |
425 | "@ERROR: access denied to %s from %s (%s)\n", | |
426 | name, host, addr); | |
427 | } | |
56c473b7 AT |
428 | return -1; |
429 | } | |
3591c066 | 430 | |
68f40ebb | 431 | if (am_daemon && am_server) { |
9e5a5ddb | 432 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
433 | name, host, addr); |
434 | } | |
435 | ||
5e71c444 | 436 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 437 | if (errno) { |
1732b6c0 | 438 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 439 | lp_lock_file(i)); |
4875d6b6 | 440 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 441 | } else { |
1732b6c0 | 442 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 443 | lp_max_connections(i)); |
4ccfd96c | 444 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 445 | lp_max_connections(i)); |
8d72ef6e | 446 | } |
0c515f17 AT |
447 | return -1; |
448 | } | |
449 | ||
45c5b903 | 450 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 451 | |
97cb8dc2 | 452 | if (!auth_user) { |
68f40ebb | 453 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 454 | return -1; |
d0d56395 AT |
455 | } |
456 | ||
3591c066 AT |
457 | module_id = i; |
458 | ||
211bc43b | 459 | if (lp_read_only(i)) |
18638730 WD |
460 | read_only = 1; |
461 | ||
10ae3406 | 462 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 463 | logfile_format = lp_log_format(i); |
10ae3406 WD |
464 | if (log_format_has(logfile_format, 'i')) |
465 | logfile_format_has_i = 1; | |
466 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
467 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 468 | |
6fe05820 | 469 | am_root = (MY_UID() == 0); |
8ef4ffd6 | 470 | |
716baed7 DD |
471 | if (am_root) { |
472 | p = lp_uid(i); | |
473 | if (!name_to_uid(p, &uid)) { | |
2dc7b8bd | 474 | if (!isDigit(p)) { |
1732b6c0 | 475 | rprintf(FLOG, "Invalid uid %s\n", p); |
68f40ebb | 476 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
716baed7 | 477 | return -1; |
4a7144ee | 478 | } |
716baed7 DD |
479 | uid = atoi(p); |
480 | } | |
481 | ||
482 | p = lp_gid(i); | |
483 | if (!name_to_gid(p, &gid)) { | |
2dc7b8bd | 484 | if (!isDigit(p)) { |
1732b6c0 | 485 | rprintf(FLOG, "Invalid gid %s\n", p); |
68f40ebb | 486 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
716baed7 | 487 | return -1; |
4a7144ee | 488 | } |
716baed7 DD |
489 | gid = atoi(p); |
490 | } | |
8ef4ffd6 | 491 | } |
3b2b5345 | 492 | |
4a7144ee WD |
493 | /* TODO: If we're not root, but the configuration requests |
494 | * that we change to some uid other than the current one, then | |
495 | * log a warning. */ | |
496 | ||
497 | /* TODO: Perhaps take a list of gids, and make them into the | |
498 | * supplementary groups. */ | |
8ef4ffd6 | 499 | |
33cbd577 | 500 | module_dir = lp_path(i); |
2fe1feea WD |
501 | if (use_chroot) { |
502 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
433c6753 WD |
503 | int len = p - module_dir + 1; |
504 | if (!(module_chdir = new_array(char, len))) /* MEMORY LEAK */ | |
505 | out_of_memory("rsync_module"); | |
506 | strlcpy(module_chdir, module_dir, len); | |
507 | if (!(p = strdup(p + 2))) | |
508 | out_of_memory("rsync_module"); | |
509 | clean_fname(module_dir, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR); | |
510 | module_dir = p; | |
511 | } else { | |
512 | module_chdir = module_dir; | |
513 | if ((module_dir = strdup("/")) == NULL) | |
514 | out_of_memory("rsync_module"); | |
515 | } | |
516 | } else | |
517 | module_chdir = module_dir; | |
2fe1feea | 518 | |
29a89172 | 519 | /* We do a change_dir() that doesn't actually call chdir() |
beef86d0 | 520 | * just to make a relative path absolute. */ |
33cbd577 | 521 | strlcpy(line, curr_dir, sizeof line); |
433c6753 | 522 | if (!change_dir(module_chdir, CD_SKIP_CHDIR)) |
33cbd577 | 523 | goto chdir_failed; |
433c6753 WD |
524 | if (strcmp(curr_dir, module_chdir) != 0 |
525 | && (module_chdir = strdup(curr_dir)) == NULL) /* MEMORY LEAK */ | |
2fe1feea | 526 | out_of_memory("rsync_module"); |
29a89172 | 527 | change_dir(line, CD_SKIP_CHDIR); /* Restore curr_dir. */ |
33cbd577 | 528 | |
2fe1feea WD |
529 | module_dirlen = clean_fname(module_dir, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR); |
530 | ||
531 | if (module_dirlen == 1) { | |
e7bf7c01 | 532 | module_dirlen = 0; |
7842418b | 533 | set_filter_dir("/", 1); |
46bffd98 | 534 | } else |
33cbd577 | 535 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
536 | |
537 | p = lp_filter(i); | |
819bfe45 | 538 | parse_rule(&daemon_filter_list, p, MATCHFLG_WORD_SPLIT, |
f5aeb6ff | 539 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3); |
837cbad9 | 540 | |
cd64343a | 541 | p = lp_include_from(i); |
819bfe45 | 542 | parse_filter_file(&daemon_filter_list, p, MATCHFLG_INCLUDE, |
f5aeb6ff | 543 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
544 | |
545 | p = lp_include(i); | |
819bfe45 | 546 | parse_rule(&daemon_filter_list, p, |
0a68f869 | 547 | MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT, |
f5aeb6ff | 548 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
cd64343a | 549 | |
8f3a2d54 | 550 | p = lp_exclude_from(i); |
819bfe45 | 551 | parse_filter_file(&daemon_filter_list, p, 0, |
f5aeb6ff | 552 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 553 | |
5805327b | 554 | p = lp_exclude(i); |
819bfe45 | 555 | parse_rule(&daemon_filter_list, p, MATCHFLG_WORD_SPLIT, |
f5aeb6ff | 556 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
8f3a2d54 | 557 | |
6dc9b74b | 558 | log_init(1); |
1a016bfd | 559 | |
9d0d18b5 | 560 | #ifdef HAVE_PUTENV |
c95ca2a2 | 561 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 WD |
562 | char *modname, *modpath, *hostaddr, *hostname, *username; |
563 | int status; | |
2fe1feea | 564 | |
9d0d18b5 | 565 | if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0 |
433c6753 | 566 | || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", lp_path(i)) < 0 |
9d0d18b5 WD |
567 | || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0 |
568 | || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0 | |
569 | || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0) | |
570 | out_of_memory("rsync_module"); | |
571 | putenv(modname); | |
572 | putenv(modpath); | |
573 | putenv(hostaddr); | |
574 | putenv(hostname); | |
575 | putenv(username); | |
576 | umask(orig_umask); | |
c95ca2a2 WD |
577 | /* For post-xfer exec, fork a new process to run the rsync |
578 | * daemon while this process waits for the exit status and | |
579 | * runs the indicated command at that point. */ | |
580 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
581 | pid_t pid = fork(); |
582 | if (pid < 0) { | |
583 | rsyserr(FLOG, errno, "fork failed"); | |
584 | io_printf(f_out, "@ERROR: fork failed\n"); | |
585 | return -1; | |
586 | } | |
587 | if (pid) { | |
503114a7 WD |
588 | if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0) |
589 | putenv(p); | |
c95ca2a2 WD |
590 | if (wait_process(pid, &status, 0) < 0) |
591 | status = -1; | |
503114a7 WD |
592 | if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0) |
593 | putenv(p); | |
9d0d18b5 WD |
594 | if (WIFEXITED(status)) |
595 | status = WEXITSTATUS(status); | |
596 | else | |
597 | status = -1; | |
503114a7 WD |
598 | if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0) |
599 | putenv(p); | |
c95ca2a2 | 600 | system(lp_postxfer_exec(i)); |
9d0d18b5 WD |
601 | _exit(status); |
602 | } | |
603 | } | |
c95ca2a2 WD |
604 | /* For pre-xfer exec, fork a child process to run the indicated |
605 | * command, though it first waits for the parent process to | |
606 | * send us the user's request via a pipe. */ | |
607 | if (*lp_prexfer_exec(i)) { | |
608 | int fds[2]; | |
503114a7 WD |
609 | if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0) |
610 | putenv(p); | |
c95ca2a2 WD |
611 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
612 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
613 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
614 | return -1; | |
615 | } | |
616 | if (pre_exec_pid == 0) { | |
141c6265 WD |
617 | char buf[BIGPATHBUFLEN]; |
618 | int j, len; | |
c95ca2a2 WD |
619 | close(fds[1]); |
620 | set_blocking(fds[0]); | |
141c6265 | 621 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
622 | if (len <= 0) |
623 | _exit(1); | |
503114a7 WD |
624 | if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0) |
625 | putenv(p); | |
141c6265 WD |
626 | for (j = 0; ; j++) { |
627 | len = read_arg_from_pipe(fds[0], buf, | |
628 | BIGPATHBUFLEN); | |
629 | if (len <= 0) { | |
630 | if (!len) | |
631 | break; | |
632 | _exit(1); | |
633 | } | |
503114a7 WD |
634 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
635 | putenv(p); | |
141c6265 WD |
636 | } |
637 | close(fds[0]); | |
c95ca2a2 WD |
638 | close(STDIN_FILENO); |
639 | close(STDOUT_FILENO); | |
640 | status = system(lp_prexfer_exec(i)); | |
641 | if (!WIFEXITED(status)) | |
642 | _exit(1); | |
643 | _exit(WEXITSTATUS(status)); | |
644 | } | |
645 | close(fds[0]); | |
646 | set_blocking(fds[1]); | |
647 | pre_exec_fd = fds[1]; | |
648 | } | |
9d0d18b5 WD |
649 | umask(0); |
650 | } | |
651 | #endif | |
652 | ||
8638dd48 | 653 | if (use_chroot) { |
b52c1d9d MP |
654 | /* |
655 | * XXX: The 'use chroot' flag is a fairly reliable | |
656 | * source of confusion, because it fails under two | |
657 | * important circumstances: running as non-root, | |
658 | * running on Win32 (or possibly others). On the | |
659 | * other hand, if you are running as root, then it | |
660 | * might be better to always use chroot. | |
661 | * | |
662 | * So, perhaps if we can't chroot we should just issue | |
663 | * a warning, unless a "require chroot" flag is set, | |
664 | * in which case we fail. | |
665 | */ | |
433c6753 WD |
666 | if (chroot(module_chdir)) { |
667 | rsyserr(FLOG, errno, "chroot %s failed", module_chdir); | |
68f40ebb | 668 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
669 | return -1; |
670 | } | |
433c6753 | 671 | module_chdir = module_dir; |
716baed7 DD |
672 | } |
673 | ||
433c6753 WD |
674 | if (!change_dir(module_chdir, CD_NORMAL)) { |
675 | chdir_failed: | |
676 | rsyserr(FLOG, errno, "chdir %s failed\n", module_chdir); | |
677 | io_printf(f_out, "@ERROR: chdir failed\n"); | |
678 | return -1; | |
679 | } | |
680 | if (module_dirlen || !use_chroot) | |
681 | sanitize_paths = 1; | |
682 | ||
9585b276 | 683 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 684 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
685 | if (munge_symlinks) { |
686 | STRUCT_STAT st; | |
41adbcec WD |
687 | char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */ |
688 | strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */ | |
689 | if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) { | |
690 | rprintf(FLOG, "Symlink munging is unsafe when a %s directory exists.\n", | |
691 | prefix); | |
9585b276 WD |
692 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); |
693 | exit_cleanup(RERR_UNSUPPORTED); | |
694 | } | |
695 | } | |
696 | ||
716baed7 | 697 | if (am_root) { |
715d1f45 MP |
698 | /* XXXX: You could argue that if the daemon is started |
699 | * by a non-root user and they explicitly specify a | |
700 | * gid, then we should try to change to that gid -- | |
701 | * this could be possible if it's already in their | |
702 | * supplementary groups. */ | |
703 | ||
704 | /* TODO: Perhaps we need to document that if rsyncd is | |
705 | * started by somebody other than root it will inherit | |
706 | * all their supplementary groups. */ | |
707 | ||
716baed7 | 708 | if (setgid(gid)) { |
1732b6c0 | 709 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
68f40ebb | 710 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
711 | return -1; |
712 | } | |
4f5b0756 | 713 | #ifdef HAVE_SETGROUPS |
6969ebcf WD |
714 | /* Get rid of any supplementary groups this process |
715 | * might have inheristed. */ | |
716 | if (setgroups(1, &gid)) { | |
1732b6c0 | 717 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
718 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
719 | return -1; | |
720 | } | |
721 | #endif | |
3591c066 | 722 | |
716baed7 | 723 | if (setuid(uid)) { |
1732b6c0 | 724 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
68f40ebb | 725 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
726 | return -1; |
727 | } | |
728 | ||
6fe05820 | 729 | am_root = (MY_UID() == 0); |
3591c066 AT |
730 | } |
731 | ||
fed1f3f4 WD |
732 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
733 | tmpdir = lp_temp_dir(i); | |
734 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
735 | rprintf(FLOG, | |
736 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
737 | name); | |
738 | tmpdir = NULL; | |
739 | } | |
740 | } | |
741 | ||
68f40ebb | 742 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 743 | |
53936ef9 WD |
744 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
745 | orig_argv = argv; | |
746 | ||
41adbcec WD |
747 | save_munge_symlinks = munge_symlinks; |
748 | ||
951e826b | 749 | reset_output_levels(); /* future verbosity is controlled by client options */ |
53936ef9 WD |
750 | ret = parse_arguments(&argc, (const char ***) &argv); |
751 | if (protect_args && ret) { | |
752 | orig_early_argv = orig_argv; | |
753 | protect_args = 2; | |
754 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
755 | orig_argv = argv; | |
756 | ret = parse_arguments(&argc, (const char ***) &argv); | |
757 | } else | |
758 | orig_early_argv = NULL; | |
3591c066 | 759 | |
41adbcec WD |
760 | munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */ |
761 | ||
141c6265 WD |
762 | if (pre_exec_pid) { |
763 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
53936ef9 | 764 | orig_early_argv, orig_argv); |
141c6265 | 765 | } |
c95ca2a2 | 766 | |
53936ef9 WD |
767 | if (orig_early_argv) |
768 | free(orig_early_argv); | |
769 | ||
875a13b4 | 770 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 771 | quiet = 0; |
3162ea6f WD |
772 | if (lp_ignore_errors(module_id)) |
773 | ignore_errors = 1; | |
5223b786 WD |
774 | if (write_batch < 0) |
775 | dry_run = 1; | |
3591c066 | 776 | |
cbbd8e2e WD |
777 | if (lp_fake_super(i)) { |
778 | if (preserve_xattrs > 1) | |
779 | preserve_xattrs = 1; | |
9439c0cb | 780 | am_root = -1; |
cbbd8e2e | 781 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
782 | am_root = 2; |
783 | ||
7c2a9e76 WD |
784 | if (filesfrom_fd == 0) |
785 | filesfrom_fd = f_in; | |
786 | ||
7b372642 | 787 | if (request) { |
97cb8dc2 | 788 | if (*auth_user) { |
9e5a5ddb WD |
789 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
790 | am_sender ? "on" : "to", | |
97cb8dc2 | 791 | request, auth_user, host, addr); |
d0d56395 | 792 | } else { |
9e5a5ddb WD |
793 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
794 | am_sender ? "on" : "to", | |
d0d56395 AT |
795 | request, host, addr); |
796 | } | |
7b372642 AT |
797 | free(request); |
798 | } | |
799 | ||
15b7b73d | 800 | #ifndef DEBUG |
3591c066 | 801 | /* don't allow the logs to be flooded too fast */ |
951e826b | 802 | limit_output_verbosity(lp_max_verbosity(i)); |
0199b05f | 803 | #endif |
3591c066 | 804 | |
1732b6c0 WD |
805 | if (protocol_version < 23 |
806 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 807 | io_start_multiplex_out(); |
c95ca2a2 | 808 | else if (!ret || err_msg) { |
1732b6c0 WD |
809 | /* We have to get I/O multiplexing started so that we can |
810 | * get the error back to the client. This means getting | |
811 | * the protocol setup finished first in later versions. */ | |
812 | setup_protocol(f_out, f_in); | |
b03c719f WD |
813 | if (!am_sender) { |
814 | /* Since we failed in our option parsing, we may not | |
815 | * have finished parsing that the client sent us a | |
816 | * --files-from option, so look for it manually. | |
817 | * Without this, the socket would be in the wrong | |
818 | * state for the upcoming error message. */ | |
819 | if (!files_from) { | |
820 | int i; | |
821 | for (i = 0; i < argc; i++) { | |
822 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
823 | files_from = ""; | |
824 | break; | |
825 | } | |
826 | } | |
827 | } | |
828 | if (files_from) | |
829 | write_byte(f_out, 0); | |
830 | } | |
da3478b2 | 831 | io_start_multiplex_out(); |
554e0a8d | 832 | } |
15b7b73d | 833 | |
c95ca2a2 WD |
834 | if (!ret || err_msg) { |
835 | if (err_msg) | |
332cf6df | 836 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
837 | else |
838 | option_error(); | |
7e561438 | 839 | msleep(400); |
4a7144ee | 840 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
841 | } |
842 | ||
15dbffc2 | 843 | #ifdef ICONV_OPTION |
0b52f94d WD |
844 | if (!iconv_opt) { |
845 | if (ic_send != (iconv_t)-1) { | |
846 | iconv_close(ic_send); | |
847 | ic_send = (iconv_t)-1; | |
848 | } | |
849 | if (ic_recv != (iconv_t)-1) { | |
850 | iconv_close(ic_recv); | |
851 | ic_recv = (iconv_t)-1; | |
852 | } | |
853 | } | |
15dbffc2 | 854 | #endif |
0b52f94d WD |
855 | |
856 | if (!numeric_ids | |
857 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
858 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
859 | ||
3e6ddb37 WD |
860 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
861 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 862 | |
f041b025 WD |
863 | /* If we have some incoming/outgoing chmod changes, append them to |
864 | * any user-specified changes (making our changes have priority). | |
865 | * We also get a pointer to just our changes so that a receiver | |
866 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
867 | if (am_sender) |
868 | p = lp_outgoing_chmod(i); | |
869 | else | |
870 | p = lp_incoming_chmod(i); | |
8840ec0f | 871 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
872 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
873 | am_sender ? "outgo" : "incom", p); | |
874 | } | |
730df9d2 | 875 | |
c9dc1300 | 876 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
877 | |
878 | return 0; | |
879 | } | |
880 | ||
7a6421fa AT |
881 | /* send a list of available modules to the client. Don't list those |
882 | with "list = False". */ | |
3591c066 AT |
883 | static void send_listing(int fd) |
884 | { | |
b583594a | 885 | int n = lp_num_modules(); |
3591c066 | 886 | int i; |
063393d6 | 887 | |
c0422cea | 888 | for (i = 0; i < n; i++) { |
3591c066 | 889 | if (lp_list(i)) |
4a7144ee | 890 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 891 | } |
8f04bb36 | 892 | |
daa598df | 893 | if (protocol_version >= 25) |
063393d6 | 894 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
895 | } |
896 | ||
d1c06c21 WD |
897 | static int load_config(int globals_only) |
898 | { | |
899 | if (!config_file) { | |
900 | if (am_server && am_root <= 0) | |
901 | config_file = RSYNCD_USERCONF; | |
902 | else | |
903 | config_file = RSYNCD_SYSCONF; | |
904 | } | |
905 | return lp_load(config_file, globals_only); | |
906 | } | |
907 | ||
68f40ebb | 908 | /* this is called when a connection is established to a client |
3591c066 AT |
909 | and we want to start talking. The setup of the system is done from |
910 | here */ | |
68f40ebb | 911 | int start_daemon(int f_in, int f_out) |
3591c066 | 912 | { |
20accf4d | 913 | char line[1024]; |
7909e65f | 914 | char *addr, *host; |
c0422cea | 915 | int i; |
4cdf25e4 | 916 | |
da3478b2 WD |
917 | io_set_sock_fds(f_in, f_out); |
918 | ||
374c3e12 WD |
919 | /* We must load the config file before calling any function that |
920 | * might cause log-file output to occur. This ensures that the | |
921 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 922 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 923 | if (!load_config(0)) |
65417579 | 924 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 925 | |
374c3e12 WD |
926 | addr = client_addr(f_in); |
927 | host = client_name(f_in); | |
928 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); | |
91d324b4 | 929 | |
68f40ebb WD |
930 | if (!am_server) { |
931 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
68f40ebb WD |
932 | set_nonblocking(f_in); |
933 | } | |
3591c066 | 934 | |
7909e65f | 935 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 936 | return -1; |
91eee594 | 937 | |
c0422cea | 938 | line[0] = 0; |
7909e65f | 939 | if (!read_line_old(f_in, line, sizeof line)) |
c0422cea | 940 | return -1; |
3591c066 | 941 | |
c0422cea | 942 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
943 | rprintf(FLOG, "module-list request from %s (%s)\n", |
944 | host, addr); | |
c0422cea WD |
945 | send_listing(f_out); |
946 | return -1; | |
947 | } | |
3591c066 | 948 | |
c0422cea WD |
949 | if (*line == '#') { |
950 | /* it's some sort of command that I don't understand */ | |
951 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
952 | return -1; | |
953 | } | |
3591c066 | 954 | |
c0422cea | 955 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
956 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
957 | line, host, addr); | |
958 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
959 | return -1; | |
3591c066 AT |
960 | } |
961 | ||
d749eb68 WD |
962 | #ifdef HAVE_SIGACTION |
963 | sigact.sa_flags = SA_NOCLDSTOP; | |
964 | #endif | |
965 | SIGACTION(SIGCHLD, remember_children); | |
966 | ||
439a198d | 967 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
968 | } |
969 | ||
dd589118 | 970 | static void create_pid_file(void) |
a1d2685b WD |
971 | { |
972 | char *pid_file = lp_pid_file(); | |
973 | char pidbuf[16]; | |
dd589118 | 974 | pid_t pid = getpid(); |
a1d2685b WD |
975 | int fd; |
976 | ||
977 | if (!pid_file || !*pid_file) | |
978 | return; | |
979 | ||
980 | cleanup_set_pid(pid); | |
dd589118 | 981 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) { |
a1d2685b | 982 | cleanup_set_pid(0); |
dd589118 | 983 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
984 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
985 | exit_cleanup(RERR_FILEIO); | |
986 | } | |
987 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
988 | write(fd, pidbuf, strlen(pidbuf)); | |
989 | close(fd); | |
990 | } | |
991 | ||
992 | /* Become a daemon, discarding the controlling terminal. */ | |
993 | static void become_daemon(void) | |
3591c066 | 994 | { |
a1d2685b WD |
995 | int i; |
996 | pid_t pid = fork(); | |
997 | ||
998 | if (pid) { | |
dd589118 WD |
999 | if (pid < 0) { |
1000 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1001 | exit_cleanup(RERR_FILEIO); | |
1002 | } | |
a1d2685b WD |
1003 | _exit(0); |
1004 | } | |
1a016bfd | 1005 | |
dd589118 WD |
1006 | create_pid_file(); |
1007 | ||
a1d2685b WD |
1008 | /* detach from the terminal */ |
1009 | #ifdef HAVE_SETSID | |
1010 | setsid(); | |
1011 | #elif defined TIOCNOTTY | |
1012 | i = open("/dev/tty", O_RDWR); | |
1013 | if (i >= 0) { | |
1014 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1015 | close(i); | |
1016 | } | |
1017 | #endif | |
1018 | /* make sure that stdin, stdout an stderr don't stuff things | |
1019 | * up (library functions, for example) */ | |
1020 | for (i = 0; i < 3; i++) { | |
1021 | close(i); | |
1022 | open("/dev/null", O_RDWR); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | int daemon_main(void) | |
1027 | { | |
3591c066 | 1028 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1029 | int i; |
1030 | ||
1031 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1032 | * stderr so that library functions (and getopt) don't |
1033 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1034 | for (i = 1; i < 3; i++) { |
4a7144ee | 1035 | close(i); |
41979ff8 AT |
1036 | open("/dev/null", O_RDWR); |
1037 | } | |
3eb38818 | 1038 | |
68f40ebb | 1039 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1040 | } |
1041 | ||
d1c06c21 | 1042 | if (!load_config(1)) { |
a1d2685b | 1043 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1044 | exit_cleanup(RERR_SYNTAX); |
a1d2685b | 1045 | } |
2206abf8 | 1046 | set_dparams(0); |
a1d2685b WD |
1047 | |
1048 | if (no_detach) | |
dd589118 | 1049 | create_pid_file(); |
a1d2685b WD |
1050 | else |
1051 | become_daemon(); | |
f9e940ef | 1052 | |
0c56b1ad WD |
1053 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1054 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1055 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1056 | bind_address = lp_bind_address(); |
0c56b1ad | 1057 | |
6dc9b74b | 1058 | log_init(0); |
f9e940ef | 1059 | |
9e5a5ddb | 1060 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1061 | RSYNC_VERSION, rsync_port); |
1062 | /* TODO: If listening on a particular address, then show that | |
1063 | * address too. In fact, why not just do inet_ntop on the | |
1064 | * local address??? */ | |
e42c9458 | 1065 | |
8ef4ffd6 AT |
1066 | start_accept_loop(rsync_port, start_daemon); |
1067 | return -1; | |
3591c066 | 1068 | } |