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; | |
6e195fe9 | 51 | extern char *bind_address; |
6e195fe9 | 52 | extern char *config_file; |
ecc7623e | 53 | extern char *logfile_format; |
bf4679e8 | 54 | extern char *files_from; |
fed1f3f4 | 55 | extern char *tmpdir; |
730df9d2 | 56 | extern struct chmod_mode_struct *chmod_modes; |
7b6c5c77 | 57 | extern filter_rule_list daemon_filter_list; |
0b52f94d WD |
58 | #ifdef ICONV_OPTION |
59 | extern char *iconv_opt; | |
60 | extern iconv_t ic_send, ic_recv; | |
61 | #endif | |
6e195fe9 | 62 | |
7f367bb1 WD |
63 | #define MAX_GID_LIST 32 |
64 | ||
6e195fe9 | 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 | ||
26e21efc WD |
76 | char *full_module_path; |
77 | ||
7909e65f WD |
78 | static int rl_nulls = 0; |
79 | ||
d749eb68 WD |
80 | #ifdef HAVE_SIGACTION |
81 | static struct sigaction sigact; | |
82 | #endif | |
83 | ||
7f367bb1 WD |
84 | static gid_t gid_list[MAX_GID_LIST]; |
85 | static int gid_count = 0; | |
86 | ||
11ef77b7 MM |
87 | /* Used when "reverse lookup" is off. */ |
88 | const char undetermined_hostname[] = "UNDETERMINED"; | |
89 | ||
be2961da | 90 | /** |
bc363ea9 | 91 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
92 | * function for remote-shell connections is do_cmd(). |
93 | * | |
fdf88d75 MP |
94 | * After negotiating which module to use and reading the server's |
95 | * motd, this hands over to client_run(). Telling the server the | |
96 | * module will cause it to chroot/setuid/etc. | |
97 | * | |
98 | * Instead of doing a transfer, the client may at this stage instead | |
99 | * get a listing of remote modules and exit. | |
be2961da MP |
100 | * |
101 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 102 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 103 | **/ |
7909e65f WD |
104 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
105 | int argc, char *argv[]) | |
3591c066 | 106 | { |
68f40ebb | 107 | int fd, ret; |
2e94e70e | 108 | char *p, *user = NULL; |
4a7144ee | 109 | |
1732b6c0 WD |
110 | /* This is redundant with code in start_inband_exchange(), but this |
111 | * short-circuits a problem in the client before we open a socket, | |
112 | * and the extra check won't hurt. */ | |
7909e65f | 113 | if (**remote_argv == '/') { |
1732b6c0 WD |
114 | rprintf(FERROR, |
115 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
116 | return -1; |
117 | } | |
118 | ||
b31c92ed | 119 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
120 | user = host; |
121 | host = p+1; | |
1732b6c0 | 122 | *p = '\0'; |
bcb7e502 AT |
123 | } |
124 | ||
837cbad9 WD |
125 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
126 | default_af_hint); | |
df5cd107 | 127 | if (fd == -1) |
65417579 | 128 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 129 | |
5b3aa802 WD |
130 | #ifdef ICONV_CONST |
131 | setup_iconv(); | |
132 | #endif | |
133 | ||
7909e65f | 134 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 135 | |
180443af | 136 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
137 | } |
138 | ||
7909e65f WD |
139 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
140 | { | |
141 | int remote_sub = -1; | |
142 | #if SUBPROTOCOL_VERSION != 0 | |
143 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
144 | #else | |
145 | int our_sub = 0; | |
146 | #endif | |
147 | char *motd; | |
148 | ||
149 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
150 | ||
151 | if (!am_client) { | |
152 | motd = lp_motd_file(); | |
153 | if (motd && *motd) { | |
154 | FILE *f = fopen(motd,"r"); | |
155 | while (f && !feof(f)) { | |
156 | int len = fread(buf, 1, bufsiz - 1, f); | |
157 | if (len > 0) | |
158 | write_buf(f_out, buf, len); | |
159 | } | |
160 | if (f) | |
161 | fclose(f); | |
162 | write_sbuf(f_out, "\n"); | |
163 | } | |
164 | } | |
165 | ||
166 | /* This strips the \n. */ | |
5ebe9a46 | 167 | if (!read_line_old(f_in, buf, bufsiz, 0)) { |
7909e65f WD |
168 | if (am_client) |
169 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
170 | return -1; | |
171 | } | |
172 | ||
173 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
174 | if (am_client) | |
175 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
176 | else | |
177 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
178 | return -1; | |
179 | } | |
180 | ||
181 | if (remote_sub < 0) { | |
182 | if (remote_protocol == 30) { | |
183 | if (am_client) | |
184 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
185 | else | |
186 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
187 | return -1; | |
188 | } | |
189 | remote_sub = 0; | |
190 | } | |
191 | ||
192 | if (protocol_version > remote_protocol) { | |
193 | protocol_version = remote_protocol; | |
194 | if (remote_sub) | |
195 | protocol_version--; | |
196 | } else if (protocol_version == remote_protocol) { | |
197 | if (remote_sub != our_sub) | |
198 | protocol_version--; | |
199 | } | |
200 | #if SUBPROTOCOL_VERSION != 0 | |
201 | else if (protocol_version < remote_protocol) { | |
202 | if (our_sub) | |
203 | protocol_version--; | |
204 | } | |
205 | #endif | |
206 | ||
207 | if (protocol_version >= 30) | |
208 | rl_nulls = 1; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 214 | { |
e844a4a8 | 215 | int i, modlen; |
7909e65f | 216 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
217 | char *sargs[MAX_ARGS]; |
218 | int sargc = 0; | |
e844a4a8 | 219 | char *p, *modname; |
68f40ebb | 220 | |
d4c5cb2b | 221 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 222 | |
e844a4a8 | 223 | if (**argv == '/') { |
1732b6c0 WD |
224 | rprintf(FERROR, |
225 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
226 | return -1; |
227 | } | |
228 | ||
e844a4a8 WD |
229 | if (!(p = strchr(*argv, '/'))) |
230 | modlen = strlen(*argv); | |
231 | else | |
232 | modlen = p - *argv; | |
233 | ||
234 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
235 | out_of_memory("start_inband_exchange"); | |
236 | strlcpy(modname, *argv, modlen + 1); | |
237 | modname[modlen] = '/'; | |
238 | modname[modlen+1] = '\0'; | |
239 | ||
2e94e70e WD |
240 | if (!user) |
241 | user = getenv("USER"); | |
242 | if (!user) | |
243 | user = getenv("LOGNAME"); | |
68f40ebb | 244 | |
7909e65f | 245 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 246 | return -1; |
3591c066 | 247 | |
9bcb2595 WD |
248 | /* set daemon_over_rsh to false since we need to build the |
249 | * true set of args passed through the rsh/ssh connection; | |
250 | * this is a no-op for direct-socket-connection mode */ | |
251 | daemon_over_rsh = 0; | |
252 | server_options(sargs, &sargc); | |
253 | ||
7909e65f WD |
254 | if (sargc >= MAX_ARGS - 2) |
255 | goto arg_overflow; | |
256 | ||
9bcb2595 WD |
257 | sargs[sargc++] = "."; |
258 | ||
7909e65f WD |
259 | while (argc > 0) { |
260 | if (sargc >= MAX_ARGS - 1) { | |
261 | arg_overflow: | |
262 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
263 | exit_cleanup(RERR_SYNTAX); | |
264 | } | |
d348d5fd | 265 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
266 | && argv[0][modlen] == '\0') |
267 | sargs[sargc++] = modname; /* we send "modname/" */ | |
8f30d215 WD |
268 | else if (**argv == '-') { |
269 | if (asprintf(sargs + sargc++, "./%s", *argv) < 0) | |
270 | out_of_memory("start_inband_exchange"); | |
271 | } else | |
e844a4a8 WD |
272 | sargs[sargc++] = *argv; |
273 | argv++; | |
7909e65f WD |
274 | argc--; |
275 | } | |
9bcb2595 WD |
276 | |
277 | sargs[sargc] = NULL; | |
278 | ||
951e826b | 279 | if (DEBUG_GTE(CMD, 1)) |
0b515981 | 280 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 281 | |
e844a4a8 | 282 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 283 | |
063393d6 MP |
284 | /* Old servers may just drop the connection here, |
285 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 286 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 287 | |
063393d6 | 288 | while (1) { |
5ebe9a46 | 289 | if (!read_line_old(f_in, line, sizeof line, 0)) { |
be2961da | 290 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
291 | return -1; |
292 | } | |
31593dd6 | 293 | |
31593dd6 | 294 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 295 | auth_client(f_out, user, line+18); |
31593dd6 AT |
296 | continue; |
297 | } | |
31593dd6 | 298 | |
2e94e70e WD |
299 | if (strcmp(line,"@RSYNCD: OK") == 0) |
300 | break; | |
8f04bb36 | 301 | |
cae95647 MP |
302 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
303 | /* This is sent by recent versions of the | |
304 | * server to terminate the listing of modules. | |
305 | * We don't want to go on and transfer | |
306 | * anything; just exit. */ | |
307 | exit(0); | |
308 | } | |
8f04bb36 | 309 | |
136ac7ec | 310 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 311 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
312 | /* This is always fatal; the server will now |
313 | * close the socket. */ | |
180443af | 314 | return -1; |
136ac7ec | 315 | } |
180443af | 316 | |
9ce7fc38 WD |
317 | /* This might be a MOTD line or a module listing, but there is |
318 | * no way to differentiate it. The manpage mentions this. */ | |
319 | if (output_motd) | |
320 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 321 | } |
8dad7fc6 | 322 | kluge_around_eof = 0; |
3591c066 | 323 | |
7909e65f WD |
324 | if (rl_nulls) { |
325 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
326 | if (!sargs[i]) /* stop at --protect-args NULL */ |
327 | break; | |
7909e65f WD |
328 | write_sbuf(f_out, sargs[i]); |
329 | write_byte(f_out, 0); | |
330 | } | |
331 | write_byte(f_out, 0); | |
332 | } else { | |
333 | for (i = 0; i < sargc; i++) | |
334 | io_printf(f_out, "%s\n", sargs[i]); | |
335 | write_sbuf(f_out, "\n"); | |
3591c066 | 336 | } |
3591c066 | 337 | |
53936ef9 WD |
338 | if (protect_args) |
339 | send_protected_args(f_out, sargs); | |
340 | ||
daa598df | 341 | if (protocol_version < 23) { |
3f55bd5d | 342 | if (protocol_version == 22 || !am_sender) |
d8587b46 | 343 | io_start_multiplex_in(f_in); |
09b7f5db | 344 | } |
8d9dc9f9 | 345 | |
e844a4a8 WD |
346 | free(modname); |
347 | ||
68f40ebb | 348 | return 0; |
3591c066 AT |
349 | } |
350 | ||
141c6265 | 351 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
53936ef9 | 352 | char **early_argv, char **argv) |
c95ca2a2 | 353 | { |
53936ef9 | 354 | int j = 0, status = -1; |
3591c066 | 355 | |
7909e65f WD |
356 | if (!request) |
357 | request = "(NONE)"; | |
141c6265 | 358 | |
7909e65f | 359 | write_buf(fd, request, strlen(request)+1); |
53936ef9 WD |
360 | if (early_argv) { |
361 | for ( ; *early_argv; early_argv++) | |
362 | write_buf(fd, *early_argv, strlen(*early_argv)+1); | |
363 | j = 1; /* Skip arg0 name in argv. */ | |
364 | } | |
365 | for ( ; argv[j]; j++) { | |
7909e65f | 366 | write_buf(fd, argv[j], strlen(argv[j])+1); |
53936ef9 WD |
367 | if (argv[j][0] == '.' && argv[j][1] == '\0') |
368 | break; | |
369 | } | |
141c6265 WD |
370 | write_byte(fd, 0); |
371 | ||
c95ca2a2 WD |
372 | close(fd); |
373 | ||
374 | if (wait_process(pid, &status, 0) < 0 | |
375 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
376 | char *e; | |
d0236360 WD |
377 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
378 | status, status < 0 ? ": " : "", | |
379 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
380 | out_of_memory("finish_pre_exec"); |
381 | return e; | |
382 | } | |
383 | return NULL; | |
384 | } | |
3591c066 | 385 | |
0a9fbe17 | 386 | #ifdef HAVE_PUTENV |
141c6265 WD |
387 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
388 | { | |
389 | char *bp = buf, *eob = buf + limit - 1; | |
390 | ||
391 | while (1) { | |
e8d6fe62 WD |
392 | int got = read(fd, bp, 1); |
393 | if (got != 1) { | |
394 | if (got < 0 && errno == EINTR) | |
395 | continue; | |
396 | return -1; | |
397 | } | |
398 | if (*bp == '\0') | |
399 | break; | |
400 | if (bp < eob) | |
401 | bp++; | |
141c6265 WD |
402 | } |
403 | *bp = '\0'; | |
404 | ||
405 | return bp - buf; | |
406 | } | |
0a9fbe17 | 407 | #endif |
141c6265 | 408 | |
26e21efc WD |
409 | static int path_failure(int f_out, const char *dir, BOOL was_chdir) |
410 | { | |
411 | if (was_chdir) | |
412 | rsyserr(FLOG, errno, "chdir %s failed\n", dir); | |
413 | else | |
414 | rprintf(FLOG, "normalize_path(%s) failed\n", dir); | |
415 | io_printf(f_out, "@ERROR: chdir failed\n"); | |
416 | return -1; | |
417 | } | |
418 | ||
7f367bb1 WD |
419 | static int add_a_group(int f_out, const char *gname) |
420 | { | |
421 | gid_t gid; | |
56017d31 WD |
422 | if (!group_to_gid(gname, &gid, True)) { |
423 | rprintf(FLOG, "Invalid gid %s\n", gname); | |
424 | io_printf(f_out, "@ERROR: invalid gid %s\n", gname); | |
425 | return -1; | |
7f367bb1 WD |
426 | } |
427 | if (gid_count == MAX_GID_LIST) { | |
428 | rprintf(FLOG, "Too many groups specified via gid parameter.\n"); | |
429 | io_printf(f_out, "@ERROR: too many groups\n"); | |
430 | return -1; | |
431 | } | |
432 | gid_list[gid_count++] = gid; | |
433 | return 0; | |
434 | } | |
435 | ||
d7205694 WD |
436 | #ifdef HAVE_GETGROUPLIST |
437 | static int want_all_groups(int f_out, uid_t uid) | |
438 | { | |
439 | const char *err; | |
440 | gid_count = MAX_GID_LIST; | |
441 | if ((err = getallgroups(uid, gid_list, &gid_count)) != NULL) { | |
442 | rsyserr(FLOG, errno, "%s", err); | |
443 | io_printf(f_out, "@ERROR: %s\n", err); | |
444 | return -1; | |
445 | } | |
446 | return 0; | |
447 | } | |
448 | #elif defined HAVE_INITGROUPS | |
7f367bb1 WD |
449 | static struct passwd *want_all_groups(int f_out, uid_t uid) |
450 | { | |
7f367bb1 WD |
451 | struct passwd *pw; |
452 | if ((pw = getpwuid(uid)) == NULL) { | |
453 | rsyserr(FLOG, errno, "getpwuid failed"); | |
454 | io_printf(f_out, "@ERROR: getpwuid failed\n"); | |
455 | return NULL; | |
456 | } | |
7f367bb1 WD |
457 | /* Start with the default group and initgroups() will add the reset. */ |
458 | gid_count = 1; | |
459 | gid_list[0] = pw->pw_gid; | |
7f367bb1 | 460 | return pw; |
7f367bb1 | 461 | } |
d7205694 | 462 | #endif |
7f367bb1 | 463 | |
0a9fbe17 WD |
464 | static void set_env_str(const char *var, const char *str) |
465 | { | |
466 | #ifdef HAVE_PUTENV | |
467 | char *mem; | |
468 | if (asprintf(&mem, "%s=%s", var, str) < 0) | |
469 | out_of_memory("set_env_str"); | |
470 | putenv(mem); | |
471 | #endif | |
472 | } | |
473 | ||
474 | #ifdef HAVE_PUTENV | |
475 | static void set_env_num(const char *var, long num) | |
476 | { | |
477 | char *mem; | |
478 | if (asprintf(&mem, "%s=%ld", var, num) < 0) | |
479 | out_of_memory("set_env_num"); | |
480 | putenv(mem); | |
481 | } | |
482 | #endif | |
483 | ||
df694f72 | 484 | static int rsync_module(int f_in, int f_out, int i, const char *addr, const char *host) |
3591c066 | 485 | { |
53936ef9 | 486 | int argc; |
433c6753 | 487 | char **argv, **orig_argv, **orig_early_argv, *module_chdir; |
20accf4d | 488 | char line[BIGPATHBUFLEN]; |
d7205694 | 489 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
7f367bb1 | 490 | struct passwd *pw = NULL; |
d7205694 | 491 | #endif |
7f367bb1 WD |
492 | uid_t uid; |
493 | int set_uid; | |
c95ca2a2 | 494 | char *p, *err_msg = NULL; |
874895d5 | 495 | char *name = lp_name(i); |
8638dd48 | 496 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 | 497 | int ret, pre_exec_fd = -1; |
41adbcec | 498 | int save_munge_symlinks; |
c95ca2a2 | 499 | pid_t pre_exec_pid = 0; |
2e94e70e | 500 | char *request = NULL; |
56c473b7 | 501 | |
0a9fbe17 WD |
502 | set_env_str("RSYNC_MODULE_NAME", name); |
503 | ||
15dbffc2 | 504 | #ifdef ICONV_OPTION |
0b52f94d WD |
505 | iconv_opt = lp_charset(i); |
506 | if (*iconv_opt) | |
507 | setup_iconv(); | |
508 | iconv_opt = NULL; | |
509 | #endif | |
510 | ||
11ef77b7 MM |
511 | /* If reverse lookup is disabled globally but enabled for this module, |
512 | * we need to do it now before the access check. */ | |
513 | if (host == undetermined_hostname && lp_reverse_lookup(i)) | |
514 | host = client_name(f_in); | |
0a9fbe17 WD |
515 | set_env_str("RSYNC_HOST_NAME", host); |
516 | set_env_str("RSYNC_HOST_ADDR", addr); | |
11ef77b7 | 517 | |
bf4170ad | 518 | if (!allow_access(addr, &host, i)) { |
1732b6c0 | 519 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 520 | name, host, addr); |
c0422cea WD |
521 | if (!lp_list(i)) |
522 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
523 | else { | |
524 | io_printf(f_out, | |
525 | "@ERROR: access denied to %s from %s (%s)\n", | |
526 | name, host, addr); | |
527 | } | |
56c473b7 AT |
528 | return -1; |
529 | } | |
3591c066 | 530 | |
68f40ebb | 531 | if (am_daemon && am_server) { |
9e5a5ddb | 532 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
533 | name, host, addr); |
534 | } | |
535 | ||
5e71c444 | 536 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 537 | if (errno) { |
1732b6c0 | 538 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 539 | lp_lock_file(i)); |
4875d6b6 | 540 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 541 | } else { |
1732b6c0 | 542 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 543 | lp_max_connections(i)); |
4ccfd96c | 544 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 545 | lp_max_connections(i)); |
8d72ef6e | 546 | } |
0c515f17 AT |
547 | return -1; |
548 | } | |
549 | ||
5ebe9a46 | 550 | read_only = lp_read_only(i); /* may also be overridden by auth_server() */ |
45c5b903 | 551 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 552 | |
97cb8dc2 | 553 | if (!auth_user) { |
68f40ebb | 554 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 555 | return -1; |
d0d56395 | 556 | } |
0a9fbe17 | 557 | set_env_str("RSYNC_USER_NAME", auth_user); |
d0d56395 | 558 | |
3591c066 AT |
559 | module_id = i; |
560 | ||
10ae3406 | 561 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 562 | logfile_format = lp_log_format(i); |
10ae3406 WD |
563 | if (log_format_has(logfile_format, 'i')) |
564 | logfile_format_has_i = 1; | |
565 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
566 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 567 | |
7f367bb1 WD |
568 | uid = MY_UID(); |
569 | am_root = (uid == 0); | |
8ef4ffd6 | 570 | |
7f367bb1 WD |
571 | p = *lp_uid(i) ? lp_uid(i) : am_root ? NOBODY_USER : NULL; |
572 | if (p) { | |
56017d31 WD |
573 | if (!user_to_uid(p, &uid, True)) { |
574 | rprintf(FLOG, "Invalid uid %s\n", p); | |
575 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); | |
576 | return -1; | |
716baed7 | 577 | } |
7f367bb1 WD |
578 | set_uid = 1; |
579 | } else | |
580 | set_uid = 0; | |
716baed7 | 581 | |
7f367bb1 WD |
582 | p = *lp_gid(i) ? strtok(lp_gid(i), ", ") : NULL; |
583 | if (p) { | |
584 | /* The "*" gid must be the first item in the list. */ | |
585 | if (strcmp(p, "*") == 0) { | |
d7205694 WD |
586 | #ifdef HAVE_GETGROUPLIST |
587 | if (want_all_groups(f_out, uid) < 0) | |
588 | return -1; | |
589 | #elif defined HAVE_INITGROUPS | |
7f367bb1 WD |
590 | if ((pw = want_all_groups(f_out, uid)) == NULL) |
591 | return -1; | |
d7205694 WD |
592 | #else |
593 | rprintf(FLOG, "This rsync does not support a gid of \"*\"\n"); | |
594 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
595 | return -1; | |
596 | #endif | |
7f367bb1 WD |
597 | } else if (add_a_group(f_out, p) < 0) |
598 | return -1; | |
599 | while ((p = strtok(NULL, ", ")) != NULL) { | |
600 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST | |
601 | if (pw) { | |
602 | rprintf(FLOG, "This rsync cannot add groups after \"*\".\n"); | |
603 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
716baed7 | 604 | return -1; |
4a7144ee | 605 | } |
7f367bb1 WD |
606 | #endif |
607 | if (add_a_group(f_out, p) < 0) | |
608 | return -1; | |
716baed7 | 609 | } |
7f367bb1 WD |
610 | } else if (am_root) { |
611 | if (add_a_group(f_out, NOBODY_GROUP) < 0) | |
612 | return -1; | |
8ef4ffd6 | 613 | } |
3b2b5345 | 614 | |
33cbd577 | 615 | module_dir = lp_path(i); |
afccb3d3 WD |
616 | if (*module_dir == '\0') { |
617 | rprintf(FLOG, "No path specified for module %s\n", name); | |
618 | io_printf(f_out, "@ERROR: no path setting.\n"); | |
619 | return -1; | |
620 | } | |
2fe1feea WD |
621 | if (use_chroot) { |
622 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
26e21efc WD |
623 | *p = '\0'; /* Temporary... */ |
624 | if (!(module_chdir = normalize_path(module_dir, True, NULL))) | |
625 | return path_failure(f_out, module_dir, False); | |
626 | *p = '/'; | |
627 | if (!(p = normalize_path(p + 2, True, &module_dirlen))) | |
628 | return path_failure(f_out, strstr(module_dir, "/./"), False); | |
629 | if (!(full_module_path = normalize_path(module_dir, False, NULL))) | |
630 | full_module_path = module_dir; | |
433c6753 WD |
631 | module_dir = p; |
632 | } else { | |
26e21efc WD |
633 | if (!(module_chdir = normalize_path(module_dir, False, NULL))) |
634 | return path_failure(f_out, module_dir, False); | |
635 | full_module_path = module_chdir; | |
636 | module_dir = "/"; | |
637 | module_dirlen = 1; | |
433c6753 | 638 | } |
26e21efc WD |
639 | } else { |
640 | if (!(module_chdir = normalize_path(module_dir, False, &module_dirlen))) | |
641 | return path_failure(f_out, module_dir, False); | |
642 | full_module_path = module_dir = module_chdir; | |
643 | } | |
0a9fbe17 | 644 | set_env_str("RSYNC_MODULE_PATH", full_module_path); |
2fe1feea WD |
645 | |
646 | if (module_dirlen == 1) { | |
e7bf7c01 | 647 | module_dirlen = 0; |
7842418b | 648 | set_filter_dir("/", 1); |
46bffd98 | 649 | } else |
33cbd577 | 650 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
651 | |
652 | p = lp_filter(i); | |
c8fa85b2 | 653 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 654 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3); |
837cbad9 | 655 | |
cd64343a | 656 | p = lp_include_from(i); |
c8fa85b2 | 657 | parse_filter_file(&daemon_filter_list, p, rule_template(FILTRULE_INCLUDE), |
f5aeb6ff | 658 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
659 | |
660 | p = lp_include(i); | |
c8fa85b2 MM |
661 | parse_filter_str(&daemon_filter_list, p, |
662 | rule_template(FILTRULE_INCLUDE | FILTRULE_WORD_SPLIT), | |
f5aeb6ff | 663 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
cd64343a | 664 | |
8f3a2d54 | 665 | p = lp_exclude_from(i); |
c8fa85b2 | 666 | parse_filter_file(&daemon_filter_list, p, rule_template(0), |
f5aeb6ff | 667 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 668 | |
5805327b | 669 | p = lp_exclude(i); |
c8fa85b2 | 670 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 671 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
8f3a2d54 | 672 | |
6dc9b74b | 673 | log_init(1); |
1a016bfd | 674 | |
9d0d18b5 | 675 | #ifdef HAVE_PUTENV |
c95ca2a2 | 676 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 | 677 | int status; |
2fe1feea | 678 | |
c95ca2a2 WD |
679 | /* For post-xfer exec, fork a new process to run the rsync |
680 | * daemon while this process waits for the exit status and | |
681 | * runs the indicated command at that point. */ | |
682 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
683 | pid_t pid = fork(); |
684 | if (pid < 0) { | |
685 | rsyserr(FLOG, errno, "fork failed"); | |
686 | io_printf(f_out, "@ERROR: fork failed\n"); | |
687 | return -1; | |
688 | } | |
689 | if (pid) { | |
ce571e64 WD |
690 | close(f_in); |
691 | if (f_out != f_in) | |
692 | close(f_out); | |
0a9fbe17 | 693 | set_env_num("RSYNC_PID", (long)pid); |
c95ca2a2 WD |
694 | if (wait_process(pid, &status, 0) < 0) |
695 | status = -1; | |
0a9fbe17 | 696 | set_env_num("RSYNC_RAW_STATUS", status); |
9d0d18b5 WD |
697 | if (WIFEXITED(status)) |
698 | status = WEXITSTATUS(status); | |
699 | else | |
700 | status = -1; | |
0a9fbe17 | 701 | set_env_num("RSYNC_EXIT_STATUS", status); |
94112924 WD |
702 | if (system(lp_postxfer_exec(i)) < 0) |
703 | status = -1; | |
9d0d18b5 WD |
704 | _exit(status); |
705 | } | |
706 | } | |
c95ca2a2 WD |
707 | /* For pre-xfer exec, fork a child process to run the indicated |
708 | * command, though it first waits for the parent process to | |
709 | * send us the user's request via a pipe. */ | |
710 | if (*lp_prexfer_exec(i)) { | |
711 | int fds[2]; | |
0a9fbe17 | 712 | set_env_num("RSYNC_PID", (long)getpid()); |
c95ca2a2 WD |
713 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
714 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
715 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
716 | return -1; | |
717 | } | |
718 | if (pre_exec_pid == 0) { | |
141c6265 WD |
719 | char buf[BIGPATHBUFLEN]; |
720 | int j, len; | |
c95ca2a2 WD |
721 | close(fds[1]); |
722 | set_blocking(fds[0]); | |
141c6265 | 723 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
724 | if (len <= 0) |
725 | _exit(1); | |
0a9fbe17 | 726 | set_env_str("RSYNC_REQUEST", buf); |
141c6265 WD |
727 | for (j = 0; ; j++) { |
728 | len = read_arg_from_pipe(fds[0], buf, | |
729 | BIGPATHBUFLEN); | |
730 | if (len <= 0) { | |
731 | if (!len) | |
732 | break; | |
733 | _exit(1); | |
734 | } | |
503114a7 WD |
735 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
736 | putenv(p); | |
141c6265 WD |
737 | } |
738 | close(fds[0]); | |
c95ca2a2 WD |
739 | close(STDIN_FILENO); |
740 | close(STDOUT_FILENO); | |
741 | status = system(lp_prexfer_exec(i)); | |
742 | if (!WIFEXITED(status)) | |
743 | _exit(1); | |
744 | _exit(WEXITSTATUS(status)); | |
745 | } | |
746 | close(fds[0]); | |
747 | set_blocking(fds[1]); | |
748 | pre_exec_fd = fds[1]; | |
749 | } | |
9d0d18b5 WD |
750 | } |
751 | #endif | |
752 | ||
8638dd48 | 753 | if (use_chroot) { |
b52c1d9d MP |
754 | /* |
755 | * XXX: The 'use chroot' flag is a fairly reliable | |
756 | * source of confusion, because it fails under two | |
757 | * important circumstances: running as non-root, | |
758 | * running on Win32 (or possibly others). On the | |
759 | * other hand, if you are running as root, then it | |
760 | * might be better to always use chroot. | |
761 | * | |
762 | * So, perhaps if we can't chroot we should just issue | |
763 | * a warning, unless a "require chroot" flag is set, | |
764 | * in which case we fail. | |
765 | */ | |
433c6753 WD |
766 | if (chroot(module_chdir)) { |
767 | rsyserr(FLOG, errno, "chroot %s failed", module_chdir); | |
68f40ebb | 768 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
769 | return -1; |
770 | } | |
433c6753 | 771 | module_chdir = module_dir; |
716baed7 DD |
772 | } |
773 | ||
26e21efc WD |
774 | if (!change_dir(module_chdir, CD_NORMAL)) |
775 | return path_failure(f_out, module_chdir, True); | |
433c6753 WD |
776 | if (module_dirlen || !use_chroot) |
777 | sanitize_paths = 1; | |
778 | ||
9585b276 | 779 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 780 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
781 | if (munge_symlinks) { |
782 | STRUCT_STAT st; | |
41adbcec WD |
783 | char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */ |
784 | strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */ | |
785 | if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) { | |
786 | rprintf(FLOG, "Symlink munging is unsafe when a %s directory exists.\n", | |
787 | prefix); | |
9585b276 WD |
788 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); |
789 | exit_cleanup(RERR_UNSUPPORTED); | |
790 | } | |
791 | } | |
792 | ||
7f367bb1 WD |
793 | if (gid_count) { |
794 | if (setgid(gid_list[0])) { | |
795 | rsyserr(FLOG, errno, "setgid %ld failed", (long)gid_list[0]); | |
68f40ebb | 796 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
797 | return -1; |
798 | } | |
4f5b0756 | 799 | #ifdef HAVE_SETGROUPS |
7f367bb1 WD |
800 | /* Set the group(s) we want to be active. */ |
801 | if (setgroups(gid_count, gid_list)) { | |
1732b6c0 | 802 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
803 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
804 | return -1; | |
805 | } | |
806 | #endif | |
7f367bb1 WD |
807 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
808 | /* pw is set if the user wants all the user's groups. */ | |
809 | if (pw && initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
810 | rsyserr(FLOG, errno, "initgroups failed"); | |
811 | io_printf(f_out, "@ERROR: initgroups failed\n"); | |
812 | return -1; | |
813 | } | |
814 | #endif | |
815 | } | |
3591c066 | 816 | |
7f367bb1 | 817 | if (set_uid) { |
cece2e3f WD |
818 | if (setuid(uid) < 0 |
819 | #ifdef HAVE_SETEUID | |
820 | || seteuid(uid) < 0 | |
821 | #endif | |
822 | ) { | |
7f367bb1 | 823 | rsyserr(FLOG, errno, "setuid %ld failed", (long)uid); |
68f40ebb | 824 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
825 | return -1; |
826 | } | |
827 | ||
6fe05820 | 828 | am_root = (MY_UID() == 0); |
3591c066 AT |
829 | } |
830 | ||
fed1f3f4 WD |
831 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
832 | tmpdir = lp_temp_dir(i); | |
833 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
834 | rprintf(FLOG, | |
835 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
836 | name); | |
837 | tmpdir = NULL; | |
838 | } | |
839 | } | |
840 | ||
68f40ebb | 841 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 842 | |
53936ef9 WD |
843 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
844 | orig_argv = argv; | |
845 | ||
41adbcec WD |
846 | save_munge_symlinks = munge_symlinks; |
847 | ||
951e826b | 848 | reset_output_levels(); /* future verbosity is controlled by client options */ |
53936ef9 WD |
849 | ret = parse_arguments(&argc, (const char ***) &argv); |
850 | if (protect_args && ret) { | |
851 | orig_early_argv = orig_argv; | |
852 | protect_args = 2; | |
853 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
854 | orig_argv = argv; | |
855 | ret = parse_arguments(&argc, (const char ***) &argv); | |
856 | } else | |
857 | orig_early_argv = NULL; | |
3591c066 | 858 | |
41adbcec WD |
859 | munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */ |
860 | ||
141c6265 WD |
861 | if (pre_exec_pid) { |
862 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
53936ef9 | 863 | orig_early_argv, orig_argv); |
141c6265 | 864 | } |
c95ca2a2 | 865 | |
53936ef9 WD |
866 | if (orig_early_argv) |
867 | free(orig_early_argv); | |
868 | ||
875a13b4 | 869 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 870 | quiet = 0; |
3162ea6f WD |
871 | if (lp_ignore_errors(module_id)) |
872 | ignore_errors = 1; | |
5223b786 WD |
873 | if (write_batch < 0) |
874 | dry_run = 1; | |
3591c066 | 875 | |
cbbd8e2e WD |
876 | if (lp_fake_super(i)) { |
877 | if (preserve_xattrs > 1) | |
878 | preserve_xattrs = 1; | |
9439c0cb | 879 | am_root = -1; |
cbbd8e2e | 880 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
881 | am_root = 2; |
882 | ||
7c2a9e76 WD |
883 | if (filesfrom_fd == 0) |
884 | filesfrom_fd = f_in; | |
885 | ||
7b372642 | 886 | if (request) { |
97cb8dc2 | 887 | if (*auth_user) { |
9e5a5ddb WD |
888 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
889 | am_sender ? "on" : "to", | |
97cb8dc2 | 890 | request, auth_user, host, addr); |
d0d56395 | 891 | } else { |
9e5a5ddb WD |
892 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
893 | am_sender ? "on" : "to", | |
d0d56395 AT |
894 | request, host, addr); |
895 | } | |
7b372642 AT |
896 | free(request); |
897 | } | |
898 | ||
15b7b73d | 899 | #ifndef DEBUG |
3591c066 | 900 | /* don't allow the logs to be flooded too fast */ |
951e826b | 901 | limit_output_verbosity(lp_max_verbosity(i)); |
0199b05f | 902 | #endif |
3591c066 | 903 | |
1732b6c0 WD |
904 | if (protocol_version < 23 |
905 | && (protocol_version == 22 || am_sender)) | |
d8587b46 | 906 | io_start_multiplex_out(f_out); |
c95ca2a2 | 907 | else if (!ret || err_msg) { |
1732b6c0 WD |
908 | /* We have to get I/O multiplexing started so that we can |
909 | * get the error back to the client. This means getting | |
910 | * the protocol setup finished first in later versions. */ | |
911 | setup_protocol(f_out, f_in); | |
b03c719f WD |
912 | if (!am_sender) { |
913 | /* Since we failed in our option parsing, we may not | |
914 | * have finished parsing that the client sent us a | |
915 | * --files-from option, so look for it manually. | |
916 | * Without this, the socket would be in the wrong | |
917 | * state for the upcoming error message. */ | |
918 | if (!files_from) { | |
919 | int i; | |
920 | for (i = 0; i < argc; i++) { | |
921 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
922 | files_from = ""; | |
923 | break; | |
924 | } | |
925 | } | |
926 | } | |
927 | if (files_from) | |
928 | write_byte(f_out, 0); | |
929 | } | |
d8587b46 | 930 | io_start_multiplex_out(f_out); |
554e0a8d | 931 | } |
15b7b73d | 932 | |
c95ca2a2 WD |
933 | if (!ret || err_msg) { |
934 | if (err_msg) | |
332cf6df | 935 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
936 | else |
937 | option_error(); | |
7e561438 | 938 | msleep(400); |
4a7144ee | 939 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
940 | } |
941 | ||
15dbffc2 | 942 | #ifdef ICONV_OPTION |
0b52f94d WD |
943 | if (!iconv_opt) { |
944 | if (ic_send != (iconv_t)-1) { | |
945 | iconv_close(ic_send); | |
946 | ic_send = (iconv_t)-1; | |
947 | } | |
948 | if (ic_recv != (iconv_t)-1) { | |
949 | iconv_close(ic_recv); | |
950 | ic_recv = (iconv_t)-1; | |
951 | } | |
952 | } | |
15dbffc2 | 953 | #endif |
0b52f94d WD |
954 | |
955 | if (!numeric_ids | |
956 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
957 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
958 | ||
8b3e6fb9 | 959 | if (lp_timeout(i) && (!io_timeout || lp_timeout(i) < io_timeout)) |
3e6ddb37 | 960 | set_io_timeout(lp_timeout(i)); |
81791cfc | 961 | |
f041b025 WD |
962 | /* If we have some incoming/outgoing chmod changes, append them to |
963 | * any user-specified changes (making our changes have priority). | |
964 | * We also get a pointer to just our changes so that a receiver | |
965 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
966 | if (am_sender) |
967 | p = lp_outgoing_chmod(i); | |
968 | else | |
969 | p = lp_incoming_chmod(i); | |
8840ec0f | 970 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
971 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
972 | am_sender ? "outgo" : "incom", p); | |
973 | } | |
730df9d2 | 974 | |
c9dc1300 | 975 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
976 | |
977 | return 0; | |
978 | } | |
979 | ||
7a6421fa AT |
980 | /* send a list of available modules to the client. Don't list those |
981 | with "list = False". */ | |
3591c066 AT |
982 | static void send_listing(int fd) |
983 | { | |
b583594a | 984 | int n = lp_num_modules(); |
3591c066 | 985 | int i; |
063393d6 | 986 | |
c0422cea | 987 | for (i = 0; i < n; i++) { |
3591c066 | 988 | if (lp_list(i)) |
4a7144ee | 989 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 990 | } |
8f04bb36 | 991 | |
daa598df | 992 | if (protocol_version >= 25) |
063393d6 | 993 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
994 | } |
995 | ||
d1c06c21 WD |
996 | static int load_config(int globals_only) |
997 | { | |
998 | if (!config_file) { | |
999 | if (am_server && am_root <= 0) | |
1000 | config_file = RSYNCD_USERCONF; | |
1001 | else | |
1002 | config_file = RSYNCD_SYSCONF; | |
1003 | } | |
1004 | return lp_load(config_file, globals_only); | |
1005 | } | |
1006 | ||
68f40ebb | 1007 | /* this is called when a connection is established to a client |
3591c066 AT |
1008 | and we want to start talking. The setup of the system is done from |
1009 | here */ | |
68f40ebb | 1010 | int start_daemon(int f_in, int f_out) |
3591c066 | 1011 | { |
20accf4d | 1012 | char line[1024]; |
df694f72 | 1013 | const char *addr, *host; |
c0422cea | 1014 | int i; |
4cdf25e4 | 1015 | |
da3478b2 WD |
1016 | io_set_sock_fds(f_in, f_out); |
1017 | ||
374c3e12 WD |
1018 | /* We must load the config file before calling any function that |
1019 | * might cause log-file output to occur. This ensures that the | |
1020 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 1021 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 1022 | if (!load_config(0)) |
65417579 | 1023 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 1024 | |
374c3e12 | 1025 | addr = client_addr(f_in); |
11ef77b7 | 1026 | host = lp_reverse_lookup(-1) ? client_name(f_in) : undetermined_hostname; |
374c3e12 | 1027 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); |
91d324b4 | 1028 | |
68f40ebb WD |
1029 | if (!am_server) { |
1030 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
68f40ebb WD |
1031 | set_nonblocking(f_in); |
1032 | } | |
3591c066 | 1033 | |
7909e65f | 1034 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 1035 | return -1; |
91eee594 | 1036 | |
c0422cea | 1037 | line[0] = 0; |
5ebe9a46 | 1038 | if (!read_line_old(f_in, line, sizeof line, 0)) |
c0422cea | 1039 | return -1; |
3591c066 | 1040 | |
c0422cea | 1041 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
1042 | rprintf(FLOG, "module-list request from %s (%s)\n", |
1043 | host, addr); | |
c0422cea WD |
1044 | send_listing(f_out); |
1045 | return -1; | |
1046 | } | |
3591c066 | 1047 | |
c0422cea WD |
1048 | if (*line == '#') { |
1049 | /* it's some sort of command that I don't understand */ | |
1050 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
1051 | return -1; | |
1052 | } | |
3591c066 | 1053 | |
c0422cea | 1054 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
1055 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
1056 | line, host, addr); | |
1057 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
1058 | return -1; | |
3591c066 AT |
1059 | } |
1060 | ||
d749eb68 WD |
1061 | #ifdef HAVE_SIGACTION |
1062 | sigact.sa_flags = SA_NOCLDSTOP; | |
1063 | #endif | |
1064 | SIGACTION(SIGCHLD, remember_children); | |
1065 | ||
439a198d | 1066 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
1067 | } |
1068 | ||
dd589118 | 1069 | static void create_pid_file(void) |
a1d2685b WD |
1070 | { |
1071 | char *pid_file = lp_pid_file(); | |
1072 | char pidbuf[16]; | |
dd589118 | 1073 | pid_t pid = getpid(); |
94112924 | 1074 | int fd, len; |
a1d2685b WD |
1075 | |
1076 | if (!pid_file || !*pid_file) | |
1077 | return; | |
1078 | ||
1079 | cleanup_set_pid(pid); | |
9a54a640 | 1080 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) { |
94112924 | 1081 | failure: |
a1d2685b | 1082 | cleanup_set_pid(0); |
dd589118 | 1083 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
1084 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
1085 | exit_cleanup(RERR_FILEIO); | |
1086 | } | |
1087 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
94112924 WD |
1088 | len = strlen(pidbuf); |
1089 | if (write(fd, pidbuf, len) != len) | |
1090 | goto failure; | |
a1d2685b WD |
1091 | close(fd); |
1092 | } | |
1093 | ||
1094 | /* Become a daemon, discarding the controlling terminal. */ | |
1095 | static void become_daemon(void) | |
3591c066 | 1096 | { |
a1d2685b WD |
1097 | int i; |
1098 | pid_t pid = fork(); | |
1099 | ||
1100 | if (pid) { | |
dd589118 WD |
1101 | if (pid < 0) { |
1102 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1103 | exit_cleanup(RERR_FILEIO); | |
1104 | } | |
a1d2685b WD |
1105 | _exit(0); |
1106 | } | |
1a016bfd | 1107 | |
dd589118 WD |
1108 | create_pid_file(); |
1109 | ||
a1d2685b WD |
1110 | /* detach from the terminal */ |
1111 | #ifdef HAVE_SETSID | |
1112 | setsid(); | |
1113 | #elif defined TIOCNOTTY | |
1114 | i = open("/dev/tty", O_RDWR); | |
1115 | if (i >= 0) { | |
1116 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1117 | close(i); | |
1118 | } | |
1119 | #endif | |
1120 | /* make sure that stdin, stdout an stderr don't stuff things | |
1121 | * up (library functions, for example) */ | |
1122 | for (i = 0; i < 3; i++) { | |
1123 | close(i); | |
1124 | open("/dev/null", O_RDWR); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | int daemon_main(void) | |
1129 | { | |
3591c066 | 1130 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1131 | int i; |
1132 | ||
1133 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1134 | * stderr so that library functions (and getopt) don't |
1135 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1136 | for (i = 1; i < 3; i++) { |
4a7144ee | 1137 | close(i); |
41979ff8 AT |
1138 | open("/dev/null", O_RDWR); |
1139 | } | |
3eb38818 | 1140 | |
68f40ebb | 1141 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1142 | } |
1143 | ||
d1c06c21 | 1144 | if (!load_config(1)) { |
a1d2685b | 1145 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1146 | exit_cleanup(RERR_SYNTAX); |
a1d2685b | 1147 | } |
2206abf8 | 1148 | set_dparams(0); |
a1d2685b WD |
1149 | |
1150 | if (no_detach) | |
dd589118 | 1151 | create_pid_file(); |
a1d2685b WD |
1152 | else |
1153 | become_daemon(); | |
f9e940ef | 1154 | |
0c56b1ad WD |
1155 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1156 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1157 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1158 | bind_address = lp_bind_address(); |
0c56b1ad | 1159 | |
6dc9b74b | 1160 | log_init(0); |
f9e940ef | 1161 | |
9e5a5ddb | 1162 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1163 | RSYNC_VERSION, rsync_port); |
1164 | /* TODO: If listening on a particular address, then show that | |
1165 | * address too. In fact, why not just do inet_ntop on the | |
1166 | * local address??? */ | |
e42c9458 | 1167 | |
8ef4ffd6 AT |
1168 | start_accept_loop(rsync_port, start_daemon); |
1169 | return -1; | |
3591c066 | 1170 | } |