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> | |
b3bf9b9d | 6 | * Copyright (C) 2002-2009 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; |
7b6c5c77 | 58 | extern filter_rule_list 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 | 64 | |
7f367bb1 WD |
65 | #define MAX_GID_LIST 32 |
66 | ||
6e195fe9 | 67 | char *auth_user; |
18638730 | 68 | int read_only = 0; |
211bc43b | 69 | int module_id = -1; |
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 | ||
26e21efc WD |
78 | char *full_module_path; |
79 | ||
7909e65f WD |
80 | static int rl_nulls = 0; |
81 | ||
d749eb68 WD |
82 | #ifdef HAVE_SIGACTION |
83 | static struct sigaction sigact; | |
84 | #endif | |
85 | ||
7f367bb1 WD |
86 | static gid_t gid_list[MAX_GID_LIST]; |
87 | static int gid_count = 0; | |
88 | ||
11ef77b7 MM |
89 | /* Used when "reverse lookup" is off. */ |
90 | const char undetermined_hostname[] = "UNDETERMINED"; | |
91 | ||
be2961da | 92 | /** |
bc363ea9 | 93 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
94 | * function for remote-shell connections is do_cmd(). |
95 | * | |
fdf88d75 MP |
96 | * After negotiating which module to use and reading the server's |
97 | * motd, this hands over to client_run(). Telling the server the | |
98 | * module will cause it to chroot/setuid/etc. | |
99 | * | |
100 | * Instead of doing a transfer, the client may at this stage instead | |
101 | * get a listing of remote modules and exit. | |
be2961da MP |
102 | * |
103 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 104 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 105 | **/ |
7909e65f WD |
106 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
107 | int argc, char *argv[]) | |
3591c066 | 108 | { |
68f40ebb | 109 | int fd, ret; |
2e94e70e | 110 | char *p, *user = NULL; |
4a7144ee | 111 | |
1732b6c0 WD |
112 | /* This is redundant with code in start_inband_exchange(), but this |
113 | * short-circuits a problem in the client before we open a socket, | |
114 | * and the extra check won't hurt. */ | |
7909e65f | 115 | if (**remote_argv == '/') { |
1732b6c0 WD |
116 | rprintf(FERROR, |
117 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
118 | return -1; |
119 | } | |
120 | ||
b31c92ed | 121 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
122 | user = host; |
123 | host = p+1; | |
1732b6c0 | 124 | *p = '\0'; |
bcb7e502 AT |
125 | } |
126 | ||
837cbad9 WD |
127 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
128 | default_af_hint); | |
df5cd107 | 129 | if (fd == -1) |
65417579 | 130 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 131 | |
5b3aa802 WD |
132 | #ifdef ICONV_CONST |
133 | setup_iconv(); | |
134 | #endif | |
135 | ||
7909e65f | 136 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 137 | |
180443af | 138 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
139 | } |
140 | ||
7909e65f WD |
141 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
142 | { | |
143 | int remote_sub = -1; | |
144 | #if SUBPROTOCOL_VERSION != 0 | |
145 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
146 | #else | |
147 | int our_sub = 0; | |
148 | #endif | |
149 | char *motd; | |
150 | ||
151 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
152 | ||
153 | if (!am_client) { | |
154 | motd = lp_motd_file(); | |
155 | if (motd && *motd) { | |
156 | FILE *f = fopen(motd,"r"); | |
157 | while (f && !feof(f)) { | |
158 | int len = fread(buf, 1, bufsiz - 1, f); | |
159 | if (len > 0) | |
160 | write_buf(f_out, buf, len); | |
161 | } | |
162 | if (f) | |
163 | fclose(f); | |
164 | write_sbuf(f_out, "\n"); | |
165 | } | |
166 | } | |
167 | ||
168 | /* This strips the \n. */ | |
169 | if (!read_line_old(f_in, buf, bufsiz)) { | |
170 | if (am_client) | |
171 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
172 | return -1; | |
173 | } | |
174 | ||
175 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
176 | if (am_client) | |
177 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
178 | else | |
179 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
180 | return -1; | |
181 | } | |
182 | ||
183 | if (remote_sub < 0) { | |
184 | if (remote_protocol == 30) { | |
185 | if (am_client) | |
186 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
187 | else | |
188 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
189 | return -1; | |
190 | } | |
191 | remote_sub = 0; | |
192 | } | |
193 | ||
194 | if (protocol_version > remote_protocol) { | |
195 | protocol_version = remote_protocol; | |
196 | if (remote_sub) | |
197 | protocol_version--; | |
198 | } else if (protocol_version == remote_protocol) { | |
199 | if (remote_sub != our_sub) | |
200 | protocol_version--; | |
201 | } | |
202 | #if SUBPROTOCOL_VERSION != 0 | |
203 | else if (protocol_version < remote_protocol) { | |
204 | if (our_sub) | |
205 | protocol_version--; | |
206 | } | |
207 | #endif | |
208 | ||
209 | if (protocol_version >= 30) | |
210 | rl_nulls = 1; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 216 | { |
e844a4a8 | 217 | int i, modlen; |
7909e65f | 218 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
219 | char *sargs[MAX_ARGS]; |
220 | int sargc = 0; | |
e844a4a8 | 221 | char *p, *modname; |
68f40ebb | 222 | |
d4c5cb2b | 223 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 224 | |
e844a4a8 | 225 | if (**argv == '/') { |
1732b6c0 WD |
226 | rprintf(FERROR, |
227 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
228 | return -1; |
229 | } | |
230 | ||
e844a4a8 WD |
231 | if (!(p = strchr(*argv, '/'))) |
232 | modlen = strlen(*argv); | |
233 | else | |
234 | modlen = p - *argv; | |
235 | ||
236 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
237 | out_of_memory("start_inband_exchange"); | |
238 | strlcpy(modname, *argv, modlen + 1); | |
239 | modname[modlen] = '/'; | |
240 | modname[modlen+1] = '\0'; | |
241 | ||
2e94e70e WD |
242 | if (!user) |
243 | user = getenv("USER"); | |
244 | if (!user) | |
245 | user = getenv("LOGNAME"); | |
68f40ebb | 246 | |
7909e65f | 247 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 248 | return -1; |
3591c066 | 249 | |
9bcb2595 WD |
250 | /* set daemon_over_rsh to false since we need to build the |
251 | * true set of args passed through the rsh/ssh connection; | |
252 | * this is a no-op for direct-socket-connection mode */ | |
253 | daemon_over_rsh = 0; | |
254 | server_options(sargs, &sargc); | |
255 | ||
7909e65f WD |
256 | if (sargc >= MAX_ARGS - 2) |
257 | goto arg_overflow; | |
258 | ||
9bcb2595 WD |
259 | sargs[sargc++] = "."; |
260 | ||
7909e65f WD |
261 | while (argc > 0) { |
262 | if (sargc >= MAX_ARGS - 1) { | |
263 | arg_overflow: | |
264 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
265 | exit_cleanup(RERR_SYNTAX); | |
266 | } | |
d348d5fd | 267 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
268 | && argv[0][modlen] == '\0') |
269 | sargs[sargc++] = modname; /* we send "modname/" */ | |
270 | else | |
271 | sargs[sargc++] = *argv; | |
272 | argv++; | |
7909e65f WD |
273 | argc--; |
274 | } | |
9bcb2595 WD |
275 | |
276 | sargs[sargc] = NULL; | |
277 | ||
951e826b | 278 | if (DEBUG_GTE(CMD, 1)) |
0b515981 | 279 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 280 | |
e844a4a8 | 281 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 282 | |
063393d6 MP |
283 | /* Old servers may just drop the connection here, |
284 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 285 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 286 | |
063393d6 | 287 | while (1) { |
7909e65f | 288 | if (!read_line_old(f_in, line, sizeof line)) { |
be2961da | 289 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
290 | return -1; |
291 | } | |
31593dd6 | 292 | |
31593dd6 | 293 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 294 | auth_client(f_out, user, line+18); |
31593dd6 AT |
295 | continue; |
296 | } | |
31593dd6 | 297 | |
2e94e70e WD |
298 | if (strcmp(line,"@RSYNCD: OK") == 0) |
299 | break; | |
8f04bb36 | 300 | |
cae95647 MP |
301 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
302 | /* This is sent by recent versions of the | |
303 | * server to terminate the listing of modules. | |
304 | * We don't want to go on and transfer | |
305 | * anything; just exit. */ | |
306 | exit(0); | |
307 | } | |
8f04bb36 | 308 | |
136ac7ec | 309 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 310 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
311 | /* This is always fatal; the server will now |
312 | * close the socket. */ | |
180443af | 313 | return -1; |
136ac7ec | 314 | } |
180443af | 315 | |
9ce7fc38 WD |
316 | /* This might be a MOTD line or a module listing, but there is |
317 | * no way to differentiate it. The manpage mentions this. */ | |
318 | if (output_motd) | |
319 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 320 | } |
8dad7fc6 | 321 | kluge_around_eof = 0; |
3591c066 | 322 | |
7909e65f WD |
323 | if (rl_nulls) { |
324 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
325 | if (!sargs[i]) /* stop at --protect-args NULL */ |
326 | break; | |
7909e65f WD |
327 | write_sbuf(f_out, sargs[i]); |
328 | write_byte(f_out, 0); | |
329 | } | |
330 | write_byte(f_out, 0); | |
331 | } else { | |
332 | for (i = 0; i < sargc; i++) | |
333 | io_printf(f_out, "%s\n", sargs[i]); | |
334 | write_sbuf(f_out, "\n"); | |
3591c066 | 335 | } |
3591c066 | 336 | |
53936ef9 WD |
337 | if (protect_args) |
338 | send_protected_args(f_out, sargs); | |
339 | ||
daa598df | 340 | if (protocol_version < 23) { |
3f55bd5d | 341 | if (protocol_version == 22 || !am_sender) |
da3478b2 | 342 | io_start_multiplex_in(); |
09b7f5db | 343 | } |
8d9dc9f9 | 344 | |
e844a4a8 WD |
345 | free(modname); |
346 | ||
68f40ebb | 347 | return 0; |
3591c066 AT |
348 | } |
349 | ||
141c6265 | 350 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
53936ef9 | 351 | char **early_argv, char **argv) |
c95ca2a2 | 352 | { |
53936ef9 | 353 | int j = 0, status = -1; |
3591c066 | 354 | |
7909e65f WD |
355 | if (!request) |
356 | request = "(NONE)"; | |
141c6265 | 357 | |
7909e65f | 358 | write_buf(fd, request, strlen(request)+1); |
53936ef9 WD |
359 | if (early_argv) { |
360 | for ( ; *early_argv; early_argv++) | |
361 | write_buf(fd, *early_argv, strlen(*early_argv)+1); | |
362 | j = 1; /* Skip arg0 name in argv. */ | |
363 | } | |
364 | for ( ; argv[j]; j++) { | |
7909e65f | 365 | write_buf(fd, argv[j], strlen(argv[j])+1); |
53936ef9 WD |
366 | if (argv[j][0] == '.' && argv[j][1] == '\0') |
367 | break; | |
368 | } | |
141c6265 WD |
369 | write_byte(fd, 0); |
370 | ||
c95ca2a2 WD |
371 | close(fd); |
372 | ||
373 | if (wait_process(pid, &status, 0) < 0 | |
374 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
375 | char *e; | |
d0236360 WD |
376 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
377 | status, status < 0 ? ": " : "", | |
378 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
379 | out_of_memory("finish_pre_exec"); |
380 | return e; | |
381 | } | |
382 | return NULL; | |
383 | } | |
3591c066 | 384 | |
141c6265 WD |
385 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
386 | { | |
387 | char *bp = buf, *eob = buf + limit - 1; | |
388 | ||
389 | while (1) { | |
e8d6fe62 WD |
390 | int got = read(fd, bp, 1); |
391 | if (got != 1) { | |
392 | if (got < 0 && errno == EINTR) | |
393 | continue; | |
394 | return -1; | |
395 | } | |
396 | if (*bp == '\0') | |
397 | break; | |
398 | if (bp < eob) | |
399 | bp++; | |
141c6265 WD |
400 | } |
401 | *bp = '\0'; | |
402 | ||
403 | return bp - buf; | |
404 | } | |
405 | ||
26e21efc WD |
406 | static int path_failure(int f_out, const char *dir, BOOL was_chdir) |
407 | { | |
408 | if (was_chdir) | |
409 | rsyserr(FLOG, errno, "chdir %s failed\n", dir); | |
410 | else | |
411 | rprintf(FLOG, "normalize_path(%s) failed\n", dir); | |
412 | io_printf(f_out, "@ERROR: chdir failed\n"); | |
413 | return -1; | |
414 | } | |
415 | ||
7f367bb1 WD |
416 | static int add_a_group(int f_out, const char *gname) |
417 | { | |
418 | gid_t gid; | |
56017d31 WD |
419 | if (!group_to_gid(gname, &gid, True)) { |
420 | rprintf(FLOG, "Invalid gid %s\n", gname); | |
421 | io_printf(f_out, "@ERROR: invalid gid %s\n", gname); | |
422 | return -1; | |
7f367bb1 WD |
423 | } |
424 | if (gid_count == MAX_GID_LIST) { | |
425 | rprintf(FLOG, "Too many groups specified via gid parameter.\n"); | |
426 | io_printf(f_out, "@ERROR: too many groups\n"); | |
427 | return -1; | |
428 | } | |
429 | gid_list[gid_count++] = gid; | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static struct passwd *want_all_groups(int f_out, uid_t uid) | |
434 | { | |
435 | #if defined HAVE_GETGROUPLIST || defined HAVE_INITGROUPS | |
436 | struct passwd *pw; | |
437 | if ((pw = getpwuid(uid)) == NULL) { | |
438 | rsyserr(FLOG, errno, "getpwuid failed"); | |
439 | io_printf(f_out, "@ERROR: getpwuid failed\n"); | |
440 | return NULL; | |
441 | } | |
442 | # ifdef HAVE_GETGROUPLIST | |
443 | /* Get all the process's groups, with the pw_gid group first. */ | |
444 | gid_count = MAX_GID_LIST; | |
445 | if (getgrouplist(pw->pw_name, pw->pw_gid, gid_list, &gid_count) < 0) { | |
446 | rsyserr(FLOG, errno, "getgrouplist failed"); | |
447 | io_printf(f_out, "@ERROR: getgrouplist failed\n"); | |
448 | return NULL; | |
449 | } | |
450 | /* Paranoia: is the default group not first in the list? */ | |
451 | if (gid_list[0] != pw->pw_gid) { | |
452 | int j; | |
453 | for (j = 0; j < gid_count; j++) { | |
454 | if (gid_list[j] == pw->pw_gid) { | |
455 | gid_list[j] = gid_list[0]; | |
456 | gid_list[0] = pw->pw_gid; | |
457 | break; | |
458 | } | |
459 | } | |
460 | } | |
461 | # else | |
462 | /* Start with the default group and initgroups() will add the reset. */ | |
463 | gid_count = 1; | |
464 | gid_list[0] = pw->pw_gid; | |
465 | # endif | |
466 | return pw; | |
467 | #else | |
468 | rprintf(FLOG, "This rsync does not support a gid of \"*\"\n"); | |
469 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
470 | return NULL; | |
471 | #endif | |
472 | } | |
473 | ||
df694f72 | 474 | static int rsync_module(int f_in, int f_out, int i, const char *addr, const char *host) |
3591c066 | 475 | { |
53936ef9 | 476 | int argc; |
433c6753 | 477 | char **argv, **orig_argv, **orig_early_argv, *module_chdir; |
20accf4d | 478 | char line[BIGPATHBUFLEN]; |
7f367bb1 WD |
479 | struct passwd *pw = NULL; |
480 | uid_t uid; | |
481 | int set_uid; | |
c95ca2a2 | 482 | char *p, *err_msg = NULL; |
874895d5 | 483 | char *name = lp_name(i); |
8638dd48 | 484 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 | 485 | int ret, pre_exec_fd = -1; |
41adbcec | 486 | int save_munge_symlinks; |
c95ca2a2 | 487 | pid_t pre_exec_pid = 0; |
2e94e70e | 488 | char *request = NULL; |
56c473b7 | 489 | |
15dbffc2 | 490 | #ifdef ICONV_OPTION |
0b52f94d WD |
491 | iconv_opt = lp_charset(i); |
492 | if (*iconv_opt) | |
493 | setup_iconv(); | |
494 | iconv_opt = NULL; | |
495 | #endif | |
496 | ||
11ef77b7 MM |
497 | /* If reverse lookup is disabled globally but enabled for this module, |
498 | * we need to do it now before the access check. */ | |
499 | if (host == undetermined_hostname && lp_reverse_lookup(i)) | |
500 | host = client_name(f_in); | |
501 | ||
56c473b7 | 502 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
1732b6c0 | 503 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 504 | name, host, addr); |
c0422cea WD |
505 | if (!lp_list(i)) |
506 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
507 | else { | |
508 | io_printf(f_out, | |
509 | "@ERROR: access denied to %s from %s (%s)\n", | |
510 | name, host, addr); | |
511 | } | |
56c473b7 AT |
512 | return -1; |
513 | } | |
3591c066 | 514 | |
68f40ebb | 515 | if (am_daemon && am_server) { |
9e5a5ddb | 516 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
517 | name, host, addr); |
518 | } | |
519 | ||
5e71c444 | 520 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 521 | if (errno) { |
1732b6c0 | 522 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 523 | lp_lock_file(i)); |
4875d6b6 | 524 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 525 | } else { |
1732b6c0 | 526 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 527 | lp_max_connections(i)); |
4ccfd96c | 528 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 529 | lp_max_connections(i)); |
8d72ef6e | 530 | } |
0c515f17 AT |
531 | return -1; |
532 | } | |
533 | ||
45c5b903 | 534 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 535 | |
97cb8dc2 | 536 | if (!auth_user) { |
68f40ebb | 537 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 538 | return -1; |
d0d56395 AT |
539 | } |
540 | ||
3591c066 AT |
541 | module_id = i; |
542 | ||
211bc43b | 543 | if (lp_read_only(i)) |
18638730 WD |
544 | read_only = 1; |
545 | ||
10ae3406 | 546 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 547 | logfile_format = lp_log_format(i); |
10ae3406 WD |
548 | if (log_format_has(logfile_format, 'i')) |
549 | logfile_format_has_i = 1; | |
550 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
551 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 552 | |
7f367bb1 WD |
553 | uid = MY_UID(); |
554 | am_root = (uid == 0); | |
8ef4ffd6 | 555 | |
7f367bb1 WD |
556 | p = *lp_uid(i) ? lp_uid(i) : am_root ? NOBODY_USER : NULL; |
557 | if (p) { | |
56017d31 WD |
558 | if (!user_to_uid(p, &uid, True)) { |
559 | rprintf(FLOG, "Invalid uid %s\n", p); | |
560 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); | |
561 | return -1; | |
716baed7 | 562 | } |
7f367bb1 WD |
563 | set_uid = 1; |
564 | } else | |
565 | set_uid = 0; | |
716baed7 | 566 | |
7f367bb1 WD |
567 | p = *lp_gid(i) ? strtok(lp_gid(i), ", ") : NULL; |
568 | if (p) { | |
569 | /* The "*" gid must be the first item in the list. */ | |
570 | if (strcmp(p, "*") == 0) { | |
571 | if ((pw = want_all_groups(f_out, uid)) == NULL) | |
572 | return -1; | |
573 | } else if (add_a_group(f_out, p) < 0) | |
574 | return -1; | |
575 | while ((p = strtok(NULL, ", ")) != NULL) { | |
576 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST | |
577 | if (pw) { | |
578 | rprintf(FLOG, "This rsync cannot add groups after \"*\".\n"); | |
579 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
716baed7 | 580 | return -1; |
4a7144ee | 581 | } |
7f367bb1 WD |
582 | #endif |
583 | if (add_a_group(f_out, p) < 0) | |
584 | return -1; | |
716baed7 | 585 | } |
7f367bb1 WD |
586 | } else if (am_root) { |
587 | if (add_a_group(f_out, NOBODY_GROUP) < 0) | |
588 | return -1; | |
8ef4ffd6 | 589 | } |
3b2b5345 | 590 | |
33cbd577 | 591 | module_dir = lp_path(i); |
2fe1feea WD |
592 | if (use_chroot) { |
593 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
26e21efc WD |
594 | *p = '\0'; /* Temporary... */ |
595 | if (!(module_chdir = normalize_path(module_dir, True, NULL))) | |
596 | return path_failure(f_out, module_dir, False); | |
597 | *p = '/'; | |
598 | if (!(p = normalize_path(p + 2, True, &module_dirlen))) | |
599 | return path_failure(f_out, strstr(module_dir, "/./"), False); | |
600 | if (!(full_module_path = normalize_path(module_dir, False, NULL))) | |
601 | full_module_path = module_dir; | |
433c6753 WD |
602 | module_dir = p; |
603 | } else { | |
26e21efc WD |
604 | if (!(module_chdir = normalize_path(module_dir, False, NULL))) |
605 | return path_failure(f_out, module_dir, False); | |
606 | full_module_path = module_chdir; | |
607 | module_dir = "/"; | |
608 | module_dirlen = 1; | |
433c6753 | 609 | } |
26e21efc WD |
610 | } else { |
611 | if (!(module_chdir = normalize_path(module_dir, False, &module_dirlen))) | |
612 | return path_failure(f_out, module_dir, False); | |
613 | full_module_path = module_dir = module_chdir; | |
614 | } | |
2fe1feea WD |
615 | |
616 | if (module_dirlen == 1) { | |
e7bf7c01 | 617 | module_dirlen = 0; |
7842418b | 618 | set_filter_dir("/", 1); |
46bffd98 | 619 | } else |
33cbd577 | 620 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
621 | |
622 | p = lp_filter(i); | |
c8fa85b2 | 623 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 624 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3); |
837cbad9 | 625 | |
cd64343a | 626 | p = lp_include_from(i); |
c8fa85b2 | 627 | parse_filter_file(&daemon_filter_list, p, rule_template(FILTRULE_INCLUDE), |
f5aeb6ff | 628 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
629 | |
630 | p = lp_include(i); | |
c8fa85b2 MM |
631 | parse_filter_str(&daemon_filter_list, p, |
632 | rule_template(FILTRULE_INCLUDE | FILTRULE_WORD_SPLIT), | |
f5aeb6ff | 633 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
cd64343a | 634 | |
8f3a2d54 | 635 | p = lp_exclude_from(i); |
c8fa85b2 | 636 | parse_filter_file(&daemon_filter_list, p, rule_template(0), |
f5aeb6ff | 637 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 638 | |
5805327b | 639 | p = lp_exclude(i); |
c8fa85b2 | 640 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 641 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
8f3a2d54 | 642 | |
6dc9b74b | 643 | log_init(1); |
1a016bfd | 644 | |
9d0d18b5 | 645 | #ifdef HAVE_PUTENV |
c95ca2a2 | 646 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 WD |
647 | char *modname, *modpath, *hostaddr, *hostname, *username; |
648 | int status; | |
2fe1feea | 649 | |
9d0d18b5 | 650 | if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0 |
26e21efc | 651 | || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", full_module_path) < 0 |
9d0d18b5 WD |
652 | || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0 |
653 | || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0 | |
654 | || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0) | |
655 | out_of_memory("rsync_module"); | |
656 | putenv(modname); | |
657 | putenv(modpath); | |
658 | putenv(hostaddr); | |
659 | putenv(hostname); | |
660 | putenv(username); | |
661 | umask(orig_umask); | |
c95ca2a2 WD |
662 | /* For post-xfer exec, fork a new process to run the rsync |
663 | * daemon while this process waits for the exit status and | |
664 | * runs the indicated command at that point. */ | |
665 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
666 | pid_t pid = fork(); |
667 | if (pid < 0) { | |
668 | rsyserr(FLOG, errno, "fork failed"); | |
669 | io_printf(f_out, "@ERROR: fork failed\n"); | |
670 | return -1; | |
671 | } | |
672 | if (pid) { | |
503114a7 WD |
673 | if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0) |
674 | putenv(p); | |
c95ca2a2 WD |
675 | if (wait_process(pid, &status, 0) < 0) |
676 | status = -1; | |
503114a7 WD |
677 | if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0) |
678 | putenv(p); | |
9d0d18b5 WD |
679 | if (WIFEXITED(status)) |
680 | status = WEXITSTATUS(status); | |
681 | else | |
682 | status = -1; | |
503114a7 WD |
683 | if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0) |
684 | putenv(p); | |
94112924 WD |
685 | if (system(lp_postxfer_exec(i)) < 0) |
686 | status = -1; | |
9d0d18b5 WD |
687 | _exit(status); |
688 | } | |
689 | } | |
c95ca2a2 WD |
690 | /* For pre-xfer exec, fork a child process to run the indicated |
691 | * command, though it first waits for the parent process to | |
692 | * send us the user's request via a pipe. */ | |
693 | if (*lp_prexfer_exec(i)) { | |
694 | int fds[2]; | |
503114a7 WD |
695 | if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0) |
696 | putenv(p); | |
c95ca2a2 WD |
697 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
698 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
699 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
700 | return -1; | |
701 | } | |
702 | if (pre_exec_pid == 0) { | |
141c6265 WD |
703 | char buf[BIGPATHBUFLEN]; |
704 | int j, len; | |
c95ca2a2 WD |
705 | close(fds[1]); |
706 | set_blocking(fds[0]); | |
141c6265 | 707 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
708 | if (len <= 0) |
709 | _exit(1); | |
503114a7 WD |
710 | if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0) |
711 | putenv(p); | |
141c6265 WD |
712 | for (j = 0; ; j++) { |
713 | len = read_arg_from_pipe(fds[0], buf, | |
714 | BIGPATHBUFLEN); | |
715 | if (len <= 0) { | |
716 | if (!len) | |
717 | break; | |
718 | _exit(1); | |
719 | } | |
503114a7 WD |
720 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
721 | putenv(p); | |
141c6265 WD |
722 | } |
723 | close(fds[0]); | |
c95ca2a2 WD |
724 | close(STDIN_FILENO); |
725 | close(STDOUT_FILENO); | |
726 | status = system(lp_prexfer_exec(i)); | |
727 | if (!WIFEXITED(status)) | |
728 | _exit(1); | |
729 | _exit(WEXITSTATUS(status)); | |
730 | } | |
731 | close(fds[0]); | |
732 | set_blocking(fds[1]); | |
733 | pre_exec_fd = fds[1]; | |
734 | } | |
9d0d18b5 WD |
735 | umask(0); |
736 | } | |
737 | #endif | |
738 | ||
8638dd48 | 739 | if (use_chroot) { |
b52c1d9d MP |
740 | /* |
741 | * XXX: The 'use chroot' flag is a fairly reliable | |
742 | * source of confusion, because it fails under two | |
743 | * important circumstances: running as non-root, | |
744 | * running on Win32 (or possibly others). On the | |
745 | * other hand, if you are running as root, then it | |
746 | * might be better to always use chroot. | |
747 | * | |
748 | * So, perhaps if we can't chroot we should just issue | |
749 | * a warning, unless a "require chroot" flag is set, | |
750 | * in which case we fail. | |
751 | */ | |
433c6753 WD |
752 | if (chroot(module_chdir)) { |
753 | rsyserr(FLOG, errno, "chroot %s failed", module_chdir); | |
68f40ebb | 754 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
755 | return -1; |
756 | } | |
433c6753 | 757 | module_chdir = module_dir; |
716baed7 DD |
758 | } |
759 | ||
26e21efc WD |
760 | if (!change_dir(module_chdir, CD_NORMAL)) |
761 | return path_failure(f_out, module_chdir, True); | |
433c6753 WD |
762 | if (module_dirlen || !use_chroot) |
763 | sanitize_paths = 1; | |
764 | ||
9585b276 | 765 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 766 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
767 | if (munge_symlinks) { |
768 | STRUCT_STAT st; | |
41adbcec WD |
769 | char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */ |
770 | strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */ | |
771 | if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) { | |
772 | rprintf(FLOG, "Symlink munging is unsafe when a %s directory exists.\n", | |
773 | prefix); | |
9585b276 WD |
774 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); |
775 | exit_cleanup(RERR_UNSUPPORTED); | |
776 | } | |
777 | } | |
778 | ||
7f367bb1 WD |
779 | if (gid_count) { |
780 | if (setgid(gid_list[0])) { | |
781 | rsyserr(FLOG, errno, "setgid %ld failed", (long)gid_list[0]); | |
68f40ebb | 782 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
783 | return -1; |
784 | } | |
4f5b0756 | 785 | #ifdef HAVE_SETGROUPS |
7f367bb1 WD |
786 | /* Set the group(s) we want to be active. */ |
787 | if (setgroups(gid_count, gid_list)) { | |
1732b6c0 | 788 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
789 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
790 | return -1; | |
791 | } | |
792 | #endif | |
7f367bb1 WD |
793 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
794 | /* pw is set if the user wants all the user's groups. */ | |
795 | if (pw && initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
796 | rsyserr(FLOG, errno, "initgroups failed"); | |
797 | io_printf(f_out, "@ERROR: initgroups failed\n"); | |
798 | return -1; | |
799 | } | |
800 | #endif | |
801 | } | |
3591c066 | 802 | |
7f367bb1 | 803 | if (set_uid) { |
716baed7 | 804 | if (setuid(uid)) { |
7f367bb1 | 805 | rsyserr(FLOG, errno, "setuid %ld failed", (long)uid); |
68f40ebb | 806 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
807 | return -1; |
808 | } | |
809 | ||
6fe05820 | 810 | am_root = (MY_UID() == 0); |
3591c066 AT |
811 | } |
812 | ||
fed1f3f4 WD |
813 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
814 | tmpdir = lp_temp_dir(i); | |
815 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
816 | rprintf(FLOG, | |
817 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
818 | name); | |
819 | tmpdir = NULL; | |
820 | } | |
821 | } | |
822 | ||
68f40ebb | 823 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 824 | |
53936ef9 WD |
825 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
826 | orig_argv = argv; | |
827 | ||
41adbcec WD |
828 | save_munge_symlinks = munge_symlinks; |
829 | ||
951e826b | 830 | reset_output_levels(); /* future verbosity is controlled by client options */ |
53936ef9 WD |
831 | ret = parse_arguments(&argc, (const char ***) &argv); |
832 | if (protect_args && ret) { | |
833 | orig_early_argv = orig_argv; | |
834 | protect_args = 2; | |
835 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
836 | orig_argv = argv; | |
837 | ret = parse_arguments(&argc, (const char ***) &argv); | |
838 | } else | |
839 | orig_early_argv = NULL; | |
3591c066 | 840 | |
41adbcec WD |
841 | munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */ |
842 | ||
141c6265 WD |
843 | if (pre_exec_pid) { |
844 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
53936ef9 | 845 | orig_early_argv, orig_argv); |
141c6265 | 846 | } |
c95ca2a2 | 847 | |
53936ef9 WD |
848 | if (orig_early_argv) |
849 | free(orig_early_argv); | |
850 | ||
875a13b4 | 851 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 852 | quiet = 0; |
3162ea6f WD |
853 | if (lp_ignore_errors(module_id)) |
854 | ignore_errors = 1; | |
5223b786 WD |
855 | if (write_batch < 0) |
856 | dry_run = 1; | |
3591c066 | 857 | |
cbbd8e2e WD |
858 | if (lp_fake_super(i)) { |
859 | if (preserve_xattrs > 1) | |
860 | preserve_xattrs = 1; | |
9439c0cb | 861 | am_root = -1; |
cbbd8e2e | 862 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
863 | am_root = 2; |
864 | ||
7c2a9e76 WD |
865 | if (filesfrom_fd == 0) |
866 | filesfrom_fd = f_in; | |
867 | ||
7b372642 | 868 | if (request) { |
97cb8dc2 | 869 | if (*auth_user) { |
9e5a5ddb WD |
870 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
871 | am_sender ? "on" : "to", | |
97cb8dc2 | 872 | request, auth_user, host, addr); |
d0d56395 | 873 | } else { |
9e5a5ddb WD |
874 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
875 | am_sender ? "on" : "to", | |
d0d56395 AT |
876 | request, host, addr); |
877 | } | |
7b372642 AT |
878 | free(request); |
879 | } | |
880 | ||
15b7b73d | 881 | #ifndef DEBUG |
3591c066 | 882 | /* don't allow the logs to be flooded too fast */ |
951e826b | 883 | limit_output_verbosity(lp_max_verbosity(i)); |
0199b05f | 884 | #endif |
3591c066 | 885 | |
1732b6c0 WD |
886 | if (protocol_version < 23 |
887 | && (protocol_version == 22 || am_sender)) | |
da3478b2 | 888 | io_start_multiplex_out(); |
c95ca2a2 | 889 | else if (!ret || err_msg) { |
1732b6c0 WD |
890 | /* We have to get I/O multiplexing started so that we can |
891 | * get the error back to the client. This means getting | |
892 | * the protocol setup finished first in later versions. */ | |
893 | setup_protocol(f_out, f_in); | |
b03c719f WD |
894 | if (!am_sender) { |
895 | /* Since we failed in our option parsing, we may not | |
896 | * have finished parsing that the client sent us a | |
897 | * --files-from option, so look for it manually. | |
898 | * Without this, the socket would be in the wrong | |
899 | * state for the upcoming error message. */ | |
900 | if (!files_from) { | |
901 | int i; | |
902 | for (i = 0; i < argc; i++) { | |
903 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
904 | files_from = ""; | |
905 | break; | |
906 | } | |
907 | } | |
908 | } | |
909 | if (files_from) | |
910 | write_byte(f_out, 0); | |
911 | } | |
da3478b2 | 912 | io_start_multiplex_out(); |
554e0a8d | 913 | } |
15b7b73d | 914 | |
c95ca2a2 WD |
915 | if (!ret || err_msg) { |
916 | if (err_msg) | |
332cf6df | 917 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
918 | else |
919 | option_error(); | |
7e561438 | 920 | msleep(400); |
4a7144ee | 921 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
922 | } |
923 | ||
15dbffc2 | 924 | #ifdef ICONV_OPTION |
0b52f94d WD |
925 | if (!iconv_opt) { |
926 | if (ic_send != (iconv_t)-1) { | |
927 | iconv_close(ic_send); | |
928 | ic_send = (iconv_t)-1; | |
929 | } | |
930 | if (ic_recv != (iconv_t)-1) { | |
931 | iconv_close(ic_recv); | |
932 | ic_recv = (iconv_t)-1; | |
933 | } | |
934 | } | |
15dbffc2 | 935 | #endif |
0b52f94d WD |
936 | |
937 | if (!numeric_ids | |
938 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
939 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
940 | ||
3e6ddb37 WD |
941 | if (lp_timeout(i) && lp_timeout(i) > io_timeout) |
942 | set_io_timeout(lp_timeout(i)); | |
81791cfc | 943 | |
f041b025 WD |
944 | /* If we have some incoming/outgoing chmod changes, append them to |
945 | * any user-specified changes (making our changes have priority). | |
946 | * We also get a pointer to just our changes so that a receiver | |
947 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
948 | if (am_sender) |
949 | p = lp_outgoing_chmod(i); | |
950 | else | |
951 | p = lp_incoming_chmod(i); | |
8840ec0f | 952 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
953 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
954 | am_sender ? "outgo" : "incom", p); | |
955 | } | |
730df9d2 | 956 | |
c9dc1300 | 957 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
958 | |
959 | return 0; | |
960 | } | |
961 | ||
7a6421fa AT |
962 | /* send a list of available modules to the client. Don't list those |
963 | with "list = False". */ | |
3591c066 AT |
964 | static void send_listing(int fd) |
965 | { | |
b583594a | 966 | int n = lp_num_modules(); |
3591c066 | 967 | int i; |
063393d6 | 968 | |
c0422cea | 969 | for (i = 0; i < n; i++) { |
3591c066 | 970 | if (lp_list(i)) |
4a7144ee | 971 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 972 | } |
8f04bb36 | 973 | |
daa598df | 974 | if (protocol_version >= 25) |
063393d6 | 975 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
976 | } |
977 | ||
d1c06c21 WD |
978 | static int load_config(int globals_only) |
979 | { | |
980 | if (!config_file) { | |
981 | if (am_server && am_root <= 0) | |
982 | config_file = RSYNCD_USERCONF; | |
983 | else | |
984 | config_file = RSYNCD_SYSCONF; | |
985 | } | |
986 | return lp_load(config_file, globals_only); | |
987 | } | |
988 | ||
68f40ebb | 989 | /* this is called when a connection is established to a client |
3591c066 AT |
990 | and we want to start talking. The setup of the system is done from |
991 | here */ | |
68f40ebb | 992 | int start_daemon(int f_in, int f_out) |
3591c066 | 993 | { |
20accf4d | 994 | char line[1024]; |
df694f72 | 995 | const char *addr, *host; |
c0422cea | 996 | int i; |
4cdf25e4 | 997 | |
da3478b2 WD |
998 | io_set_sock_fds(f_in, f_out); |
999 | ||
374c3e12 WD |
1000 | /* We must load the config file before calling any function that |
1001 | * might cause log-file output to occur. This ensures that the | |
1002 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 1003 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 1004 | if (!load_config(0)) |
65417579 | 1005 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 1006 | |
374c3e12 | 1007 | addr = client_addr(f_in); |
11ef77b7 | 1008 | host = lp_reverse_lookup(-1) ? client_name(f_in) : undetermined_hostname; |
374c3e12 | 1009 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); |
91d324b4 | 1010 | |
68f40ebb WD |
1011 | if (!am_server) { |
1012 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
68f40ebb WD |
1013 | set_nonblocking(f_in); |
1014 | } | |
3591c066 | 1015 | |
7909e65f | 1016 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 1017 | return -1; |
91eee594 | 1018 | |
c0422cea | 1019 | line[0] = 0; |
7909e65f | 1020 | if (!read_line_old(f_in, line, sizeof line)) |
c0422cea | 1021 | return -1; |
3591c066 | 1022 | |
c0422cea | 1023 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
1024 | rprintf(FLOG, "module-list request from %s (%s)\n", |
1025 | host, addr); | |
c0422cea WD |
1026 | send_listing(f_out); |
1027 | return -1; | |
1028 | } | |
3591c066 | 1029 | |
c0422cea WD |
1030 | if (*line == '#') { |
1031 | /* it's some sort of command that I don't understand */ | |
1032 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
1033 | return -1; | |
1034 | } | |
3591c066 | 1035 | |
c0422cea | 1036 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
1037 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
1038 | line, host, addr); | |
1039 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
1040 | return -1; | |
3591c066 AT |
1041 | } |
1042 | ||
d749eb68 WD |
1043 | #ifdef HAVE_SIGACTION |
1044 | sigact.sa_flags = SA_NOCLDSTOP; | |
1045 | #endif | |
1046 | SIGACTION(SIGCHLD, remember_children); | |
1047 | ||
439a198d | 1048 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
1049 | } |
1050 | ||
dd589118 | 1051 | static void create_pid_file(void) |
a1d2685b WD |
1052 | { |
1053 | char *pid_file = lp_pid_file(); | |
1054 | char pidbuf[16]; | |
dd589118 | 1055 | pid_t pid = getpid(); |
94112924 | 1056 | int fd, len; |
a1d2685b WD |
1057 | |
1058 | if (!pid_file || !*pid_file) | |
1059 | return; | |
1060 | ||
1061 | cleanup_set_pid(pid); | |
dd589118 | 1062 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) { |
94112924 | 1063 | failure: |
a1d2685b | 1064 | cleanup_set_pid(0); |
dd589118 | 1065 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
1066 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
1067 | exit_cleanup(RERR_FILEIO); | |
1068 | } | |
1069 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
94112924 WD |
1070 | len = strlen(pidbuf); |
1071 | if (write(fd, pidbuf, len) != len) | |
1072 | goto failure; | |
a1d2685b WD |
1073 | close(fd); |
1074 | } | |
1075 | ||
1076 | /* Become a daemon, discarding the controlling terminal. */ | |
1077 | static void become_daemon(void) | |
3591c066 | 1078 | { |
a1d2685b WD |
1079 | int i; |
1080 | pid_t pid = fork(); | |
1081 | ||
1082 | if (pid) { | |
dd589118 WD |
1083 | if (pid < 0) { |
1084 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1085 | exit_cleanup(RERR_FILEIO); | |
1086 | } | |
a1d2685b WD |
1087 | _exit(0); |
1088 | } | |
1a016bfd | 1089 | |
dd589118 WD |
1090 | create_pid_file(); |
1091 | ||
a1d2685b WD |
1092 | /* detach from the terminal */ |
1093 | #ifdef HAVE_SETSID | |
1094 | setsid(); | |
1095 | #elif defined TIOCNOTTY | |
1096 | i = open("/dev/tty", O_RDWR); | |
1097 | if (i >= 0) { | |
1098 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1099 | close(i); | |
1100 | } | |
1101 | #endif | |
1102 | /* make sure that stdin, stdout an stderr don't stuff things | |
1103 | * up (library functions, for example) */ | |
1104 | for (i = 0; i < 3; i++) { | |
1105 | close(i); | |
1106 | open("/dev/null", O_RDWR); | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | int daemon_main(void) | |
1111 | { | |
3591c066 | 1112 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1113 | int i; |
1114 | ||
1115 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1116 | * stderr so that library functions (and getopt) don't |
1117 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1118 | for (i = 1; i < 3; i++) { |
4a7144ee | 1119 | close(i); |
41979ff8 AT |
1120 | open("/dev/null", O_RDWR); |
1121 | } | |
3eb38818 | 1122 | |
68f40ebb | 1123 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1124 | } |
1125 | ||
d1c06c21 | 1126 | if (!load_config(1)) { |
a1d2685b | 1127 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1128 | exit_cleanup(RERR_SYNTAX); |
a1d2685b | 1129 | } |
2206abf8 | 1130 | set_dparams(0); |
a1d2685b WD |
1131 | |
1132 | if (no_detach) | |
dd589118 | 1133 | create_pid_file(); |
a1d2685b WD |
1134 | else |
1135 | become_daemon(); | |
f9e940ef | 1136 | |
0c56b1ad WD |
1137 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1138 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1139 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1140 | bind_address = lp_bind_address(); |
0c56b1ad | 1141 | |
6dc9b74b | 1142 | log_init(0); |
f9e940ef | 1143 | |
9e5a5ddb | 1144 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1145 | RSYNC_VERSION, rsync_port); |
1146 | /* TODO: If listening on a particular address, then show that | |
1147 | * address too. In fact, why not just do inet_ntop on the | |
1148 | * local address??? */ | |
e42c9458 | 1149 | |
8ef4ffd6 AT |
1150 | start_accept_loop(rsync_port, start_daemon); |
1151 | return -1; | |
3591c066 | 1152 | } |