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; |
0b52f94d WD |
59 | #ifdef ICONV_OPTION |
60 | extern char *iconv_opt; | |
61 | extern iconv_t ic_send, ic_recv; | |
62 | #endif | |
6e195fe9 | 63 | |
7f367bb1 WD |
64 | #define MAX_GID_LIST 32 |
65 | ||
6e195fe9 | 66 | char *auth_user; |
18638730 | 67 | int read_only = 0; |
211bc43b | 68 | int module_id = -1; |
8840ec0f | 69 | struct chmod_mode_struct *daemon_chmod_modes; |
3591c066 | 70 | |
33cbd577 | 71 | /* module_dirlen is the length of the module_dir string when in daemon |
2fe1feea WD |
72 | * mode and module_dir is not "/"; otherwise 0. (Note that a chroot- |
73 | * enabled module can have a non-"/" module_dir these days.) */ | |
33cbd577 | 74 | char *module_dir = NULL; |
e7bf7c01 WD |
75 | unsigned int module_dirlen = 0; |
76 | ||
26e21efc WD |
77 | char *full_module_path; |
78 | ||
7909e65f WD |
79 | static int rl_nulls = 0; |
80 | ||
d749eb68 WD |
81 | #ifdef HAVE_SIGACTION |
82 | static struct sigaction sigact; | |
83 | #endif | |
84 | ||
7f367bb1 WD |
85 | static gid_t gid_list[MAX_GID_LIST]; |
86 | static int gid_count = 0; | |
87 | ||
11ef77b7 MM |
88 | /* Used when "reverse lookup" is off. */ |
89 | const char undetermined_hostname[] = "UNDETERMINED"; | |
90 | ||
be2961da | 91 | /** |
bc363ea9 | 92 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
93 | * function for remote-shell connections is do_cmd(). |
94 | * | |
fdf88d75 MP |
95 | * After negotiating which module to use and reading the server's |
96 | * motd, this hands over to client_run(). Telling the server the | |
97 | * module will cause it to chroot/setuid/etc. | |
98 | * | |
99 | * Instead of doing a transfer, the client may at this stage instead | |
100 | * get a listing of remote modules and exit. | |
be2961da MP |
101 | * |
102 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 103 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 104 | **/ |
7909e65f WD |
105 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
106 | int argc, char *argv[]) | |
3591c066 | 107 | { |
68f40ebb | 108 | int fd, ret; |
2e94e70e | 109 | char *p, *user = NULL; |
4a7144ee | 110 | |
1732b6c0 WD |
111 | /* This is redundant with code in start_inband_exchange(), but this |
112 | * short-circuits a problem in the client before we open a socket, | |
113 | * and the extra check won't hurt. */ | |
7909e65f | 114 | if (**remote_argv == '/') { |
1732b6c0 WD |
115 | rprintf(FERROR, |
116 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
117 | return -1; |
118 | } | |
119 | ||
b31c92ed | 120 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
121 | user = host; |
122 | host = p+1; | |
1732b6c0 | 123 | *p = '\0'; |
bcb7e502 AT |
124 | } |
125 | ||
837cbad9 WD |
126 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
127 | default_af_hint); | |
df5cd107 | 128 | if (fd == -1) |
65417579 | 129 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 130 | |
5b3aa802 WD |
131 | #ifdef ICONV_CONST |
132 | setup_iconv(); | |
133 | #endif | |
134 | ||
7909e65f | 135 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 136 | |
180443af | 137 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
138 | } |
139 | ||
7909e65f WD |
140 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
141 | { | |
142 | int remote_sub = -1; | |
143 | #if SUBPROTOCOL_VERSION != 0 | |
144 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
145 | #else | |
146 | int our_sub = 0; | |
147 | #endif | |
148 | char *motd; | |
149 | ||
150 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
151 | ||
152 | if (!am_client) { | |
153 | motd = lp_motd_file(); | |
154 | if (motd && *motd) { | |
155 | FILE *f = fopen(motd,"r"); | |
156 | while (f && !feof(f)) { | |
157 | int len = fread(buf, 1, bufsiz - 1, f); | |
158 | if (len > 0) | |
159 | write_buf(f_out, buf, len); | |
160 | } | |
161 | if (f) | |
162 | fclose(f); | |
163 | write_sbuf(f_out, "\n"); | |
164 | } | |
165 | } | |
166 | ||
167 | /* This strips the \n. */ | |
168 | if (!read_line_old(f_in, buf, bufsiz)) { | |
169 | if (am_client) | |
170 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
171 | return -1; | |
172 | } | |
173 | ||
174 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
175 | if (am_client) | |
176 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
177 | else | |
178 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
179 | return -1; | |
180 | } | |
181 | ||
182 | if (remote_sub < 0) { | |
183 | if (remote_protocol == 30) { | |
184 | if (am_client) | |
185 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
186 | else | |
187 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
188 | return -1; | |
189 | } | |
190 | remote_sub = 0; | |
191 | } | |
192 | ||
193 | if (protocol_version > remote_protocol) { | |
194 | protocol_version = remote_protocol; | |
195 | if (remote_sub) | |
196 | protocol_version--; | |
197 | } else if (protocol_version == remote_protocol) { | |
198 | if (remote_sub != our_sub) | |
199 | protocol_version--; | |
200 | } | |
201 | #if SUBPROTOCOL_VERSION != 0 | |
202 | else if (protocol_version < remote_protocol) { | |
203 | if (our_sub) | |
204 | protocol_version--; | |
205 | } | |
206 | #endif | |
207 | ||
208 | if (protocol_version >= 30) | |
209 | rl_nulls = 1; | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 215 | { |
e844a4a8 | 216 | int i, modlen; |
7909e65f | 217 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
218 | char *sargs[MAX_ARGS]; |
219 | int sargc = 0; | |
e844a4a8 | 220 | char *p, *modname; |
68f40ebb | 221 | |
d4c5cb2b | 222 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 223 | |
e844a4a8 | 224 | if (**argv == '/') { |
1732b6c0 WD |
225 | rprintf(FERROR, |
226 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
227 | return -1; |
228 | } | |
229 | ||
e844a4a8 WD |
230 | if (!(p = strchr(*argv, '/'))) |
231 | modlen = strlen(*argv); | |
232 | else | |
233 | modlen = p - *argv; | |
234 | ||
235 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
236 | out_of_memory("start_inband_exchange"); | |
237 | strlcpy(modname, *argv, modlen + 1); | |
238 | modname[modlen] = '/'; | |
239 | modname[modlen+1] = '\0'; | |
240 | ||
2e94e70e WD |
241 | if (!user) |
242 | user = getenv("USER"); | |
243 | if (!user) | |
244 | user = getenv("LOGNAME"); | |
68f40ebb | 245 | |
7909e65f | 246 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 247 | return -1; |
3591c066 | 248 | |
9bcb2595 WD |
249 | /* set daemon_over_rsh to false since we need to build the |
250 | * true set of args passed through the rsh/ssh connection; | |
251 | * this is a no-op for direct-socket-connection mode */ | |
252 | daemon_over_rsh = 0; | |
253 | server_options(sargs, &sargc); | |
254 | ||
7909e65f WD |
255 | if (sargc >= MAX_ARGS - 2) |
256 | goto arg_overflow; | |
257 | ||
9bcb2595 WD |
258 | sargs[sargc++] = "."; |
259 | ||
7909e65f WD |
260 | while (argc > 0) { |
261 | if (sargc >= MAX_ARGS - 1) { | |
262 | arg_overflow: | |
263 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
264 | exit_cleanup(RERR_SYNTAX); | |
265 | } | |
d348d5fd | 266 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
267 | && argv[0][modlen] == '\0') |
268 | sargs[sargc++] = modname; /* we send "modname/" */ | |
269 | else | |
270 | sargs[sargc++] = *argv; | |
271 | argv++; | |
7909e65f WD |
272 | argc--; |
273 | } | |
9bcb2595 WD |
274 | |
275 | sargs[sargc] = NULL; | |
276 | ||
951e826b | 277 | if (DEBUG_GTE(CMD, 1)) |
0b515981 | 278 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 279 | |
e844a4a8 | 280 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 281 | |
063393d6 MP |
282 | /* Old servers may just drop the connection here, |
283 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 284 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 285 | |
063393d6 | 286 | while (1) { |
7909e65f | 287 | if (!read_line_old(f_in, line, sizeof line)) { |
be2961da | 288 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
289 | return -1; |
290 | } | |
31593dd6 | 291 | |
31593dd6 | 292 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 293 | auth_client(f_out, user, line+18); |
31593dd6 AT |
294 | continue; |
295 | } | |
31593dd6 | 296 | |
2e94e70e WD |
297 | if (strcmp(line,"@RSYNCD: OK") == 0) |
298 | break; | |
8f04bb36 | 299 | |
cae95647 MP |
300 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
301 | /* This is sent by recent versions of the | |
302 | * server to terminate the listing of modules. | |
303 | * We don't want to go on and transfer | |
304 | * anything; just exit. */ | |
305 | exit(0); | |
306 | } | |
8f04bb36 | 307 | |
136ac7ec | 308 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 309 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
310 | /* This is always fatal; the server will now |
311 | * close the socket. */ | |
180443af | 312 | return -1; |
136ac7ec | 313 | } |
180443af | 314 | |
9ce7fc38 WD |
315 | /* This might be a MOTD line or a module listing, but there is |
316 | * no way to differentiate it. The manpage mentions this. */ | |
317 | if (output_motd) | |
318 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 319 | } |
8dad7fc6 | 320 | kluge_around_eof = 0; |
3591c066 | 321 | |
7909e65f WD |
322 | if (rl_nulls) { |
323 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
324 | if (!sargs[i]) /* stop at --protect-args NULL */ |
325 | break; | |
7909e65f WD |
326 | write_sbuf(f_out, sargs[i]); |
327 | write_byte(f_out, 0); | |
328 | } | |
329 | write_byte(f_out, 0); | |
330 | } else { | |
331 | for (i = 0; i < sargc; i++) | |
332 | io_printf(f_out, "%s\n", sargs[i]); | |
333 | write_sbuf(f_out, "\n"); | |
3591c066 | 334 | } |
3591c066 | 335 | |
53936ef9 WD |
336 | if (protect_args) |
337 | send_protected_args(f_out, sargs); | |
338 | ||
daa598df | 339 | if (protocol_version < 23) { |
3f55bd5d | 340 | if (protocol_version == 22 || !am_sender) |
d8587b46 | 341 | io_start_multiplex_in(f_in); |
09b7f5db | 342 | } |
8d9dc9f9 | 343 | |
e844a4a8 WD |
344 | free(modname); |
345 | ||
68f40ebb | 346 | return 0; |
3591c066 AT |
347 | } |
348 | ||
141c6265 | 349 | static char *finish_pre_exec(pid_t pid, int fd, char *request, |
53936ef9 | 350 | char **early_argv, char **argv) |
c95ca2a2 | 351 | { |
53936ef9 | 352 | int j = 0, status = -1; |
3591c066 | 353 | |
7909e65f WD |
354 | if (!request) |
355 | request = "(NONE)"; | |
141c6265 | 356 | |
7909e65f | 357 | write_buf(fd, request, strlen(request)+1); |
53936ef9 WD |
358 | if (early_argv) { |
359 | for ( ; *early_argv; early_argv++) | |
360 | write_buf(fd, *early_argv, strlen(*early_argv)+1); | |
361 | j = 1; /* Skip arg0 name in argv. */ | |
362 | } | |
363 | for ( ; argv[j]; j++) { | |
7909e65f | 364 | write_buf(fd, argv[j], strlen(argv[j])+1); |
53936ef9 WD |
365 | if (argv[j][0] == '.' && argv[j][1] == '\0') |
366 | break; | |
367 | } | |
141c6265 WD |
368 | write_byte(fd, 0); |
369 | ||
c95ca2a2 WD |
370 | close(fd); |
371 | ||
372 | if (wait_process(pid, &status, 0) < 0 | |
373 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
374 | char *e; | |
d0236360 WD |
375 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n", |
376 | status, status < 0 ? ": " : "", | |
377 | status < 0 ? strerror(errno) : "") < 0) | |
c95ca2a2 WD |
378 | out_of_memory("finish_pre_exec"); |
379 | return e; | |
380 | } | |
381 | return NULL; | |
382 | } | |
3591c066 | 383 | |
0a9fbe17 | 384 | #ifdef HAVE_PUTENV |
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 | } | |
0a9fbe17 | 405 | #endif |
141c6265 | 406 | |
26e21efc WD |
407 | static int path_failure(int f_out, const char *dir, BOOL was_chdir) |
408 | { | |
409 | if (was_chdir) | |
410 | rsyserr(FLOG, errno, "chdir %s failed\n", dir); | |
411 | else | |
412 | rprintf(FLOG, "normalize_path(%s) failed\n", dir); | |
413 | io_printf(f_out, "@ERROR: chdir failed\n"); | |
414 | return -1; | |
415 | } | |
416 | ||
7f367bb1 WD |
417 | static int add_a_group(int f_out, const char *gname) |
418 | { | |
419 | gid_t gid; | |
56017d31 WD |
420 | if (!group_to_gid(gname, &gid, True)) { |
421 | rprintf(FLOG, "Invalid gid %s\n", gname); | |
422 | io_printf(f_out, "@ERROR: invalid gid %s\n", gname); | |
423 | return -1; | |
7f367bb1 WD |
424 | } |
425 | if (gid_count == MAX_GID_LIST) { | |
426 | rprintf(FLOG, "Too many groups specified via gid parameter.\n"); | |
427 | io_printf(f_out, "@ERROR: too many groups\n"); | |
428 | return -1; | |
429 | } | |
430 | gid_list[gid_count++] = gid; | |
431 | return 0; | |
432 | } | |
433 | ||
d7205694 WD |
434 | #ifdef HAVE_GETGROUPLIST |
435 | static int want_all_groups(int f_out, uid_t uid) | |
436 | { | |
437 | const char *err; | |
438 | gid_count = MAX_GID_LIST; | |
439 | if ((err = getallgroups(uid, gid_list, &gid_count)) != NULL) { | |
440 | rsyserr(FLOG, errno, "%s", err); | |
441 | io_printf(f_out, "@ERROR: %s\n", err); | |
442 | return -1; | |
443 | } | |
444 | return 0; | |
445 | } | |
446 | #elif defined HAVE_INITGROUPS | |
7f367bb1 WD |
447 | static struct passwd *want_all_groups(int f_out, uid_t uid) |
448 | { | |
7f367bb1 WD |
449 | struct passwd *pw; |
450 | if ((pw = getpwuid(uid)) == NULL) { | |
451 | rsyserr(FLOG, errno, "getpwuid failed"); | |
452 | io_printf(f_out, "@ERROR: getpwuid failed\n"); | |
453 | return NULL; | |
454 | } | |
7f367bb1 WD |
455 | /* Start with the default group and initgroups() will add the reset. */ |
456 | gid_count = 1; | |
457 | gid_list[0] = pw->pw_gid; | |
7f367bb1 | 458 | return pw; |
7f367bb1 | 459 | } |
d7205694 | 460 | #endif |
7f367bb1 | 461 | |
0a9fbe17 WD |
462 | static void set_env_str(const char *var, const char *str) |
463 | { | |
464 | #ifdef HAVE_PUTENV | |
465 | char *mem; | |
466 | if (asprintf(&mem, "%s=%s", var, str) < 0) | |
467 | out_of_memory("set_env_str"); | |
468 | putenv(mem); | |
469 | #endif | |
470 | } | |
471 | ||
472 | #ifdef HAVE_PUTENV | |
473 | static void set_env_num(const char *var, long num) | |
474 | { | |
475 | char *mem; | |
476 | if (asprintf(&mem, "%s=%ld", var, num) < 0) | |
477 | out_of_memory("set_env_num"); | |
478 | putenv(mem); | |
479 | } | |
480 | #endif | |
481 | ||
df694f72 | 482 | static int rsync_module(int f_in, int f_out, int i, const char *addr, const char *host) |
3591c066 | 483 | { |
53936ef9 | 484 | int argc; |
433c6753 | 485 | char **argv, **orig_argv, **orig_early_argv, *module_chdir; |
20accf4d | 486 | char line[BIGPATHBUFLEN]; |
d7205694 | 487 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
7f367bb1 | 488 | struct passwd *pw = NULL; |
d7205694 | 489 | #endif |
7f367bb1 WD |
490 | uid_t uid; |
491 | int set_uid; | |
c95ca2a2 | 492 | char *p, *err_msg = NULL; |
874895d5 | 493 | char *name = lp_name(i); |
8638dd48 | 494 | int use_chroot = lp_use_chroot(i); |
c95ca2a2 | 495 | int ret, pre_exec_fd = -1; |
41adbcec | 496 | int save_munge_symlinks; |
c95ca2a2 | 497 | pid_t pre_exec_pid = 0; |
2e94e70e | 498 | char *request = NULL; |
56c473b7 | 499 | |
0a9fbe17 WD |
500 | set_env_str("RSYNC_MODULE_NAME", name); |
501 | ||
15dbffc2 | 502 | #ifdef ICONV_OPTION |
0b52f94d WD |
503 | iconv_opt = lp_charset(i); |
504 | if (*iconv_opt) | |
505 | setup_iconv(); | |
506 | iconv_opt = NULL; | |
507 | #endif | |
508 | ||
11ef77b7 MM |
509 | /* If reverse lookup is disabled globally but enabled for this module, |
510 | * we need to do it now before the access check. */ | |
511 | if (host == undetermined_hostname && lp_reverse_lookup(i)) | |
512 | host = client_name(f_in); | |
0a9fbe17 WD |
513 | set_env_str("RSYNC_HOST_NAME", host); |
514 | set_env_str("RSYNC_HOST_ADDR", addr); | |
11ef77b7 | 515 | |
56c473b7 | 516 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
1732b6c0 | 517 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 518 | name, host, addr); |
c0422cea WD |
519 | if (!lp_list(i)) |
520 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
521 | else { | |
522 | io_printf(f_out, | |
523 | "@ERROR: access denied to %s from %s (%s)\n", | |
524 | name, host, addr); | |
525 | } | |
56c473b7 AT |
526 | return -1; |
527 | } | |
3591c066 | 528 | |
68f40ebb | 529 | if (am_daemon && am_server) { |
9e5a5ddb | 530 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
531 | name, host, addr); |
532 | } | |
533 | ||
5e71c444 | 534 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 535 | if (errno) { |
1732b6c0 | 536 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 537 | lp_lock_file(i)); |
4875d6b6 | 538 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 539 | } else { |
1732b6c0 | 540 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 541 | lp_max_connections(i)); |
4ccfd96c | 542 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 543 | lp_max_connections(i)); |
8d72ef6e | 544 | } |
0c515f17 AT |
545 | return -1; |
546 | } | |
547 | ||
45c5b903 | 548 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 549 | |
97cb8dc2 | 550 | if (!auth_user) { |
68f40ebb | 551 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 552 | return -1; |
d0d56395 | 553 | } |
0a9fbe17 | 554 | set_env_str("RSYNC_USER_NAME", auth_user); |
d0d56395 | 555 | |
3591c066 AT |
556 | module_id = i; |
557 | ||
211bc43b | 558 | if (lp_read_only(i)) |
18638730 WD |
559 | read_only = 1; |
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); |
2fe1feea WD |
616 | if (use_chroot) { |
617 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
26e21efc WD |
618 | *p = '\0'; /* Temporary... */ |
619 | if (!(module_chdir = normalize_path(module_dir, True, NULL))) | |
620 | return path_failure(f_out, module_dir, False); | |
621 | *p = '/'; | |
622 | if (!(p = normalize_path(p + 2, True, &module_dirlen))) | |
623 | return path_failure(f_out, strstr(module_dir, "/./"), False); | |
624 | if (!(full_module_path = normalize_path(module_dir, False, NULL))) | |
625 | full_module_path = module_dir; | |
433c6753 WD |
626 | module_dir = p; |
627 | } else { | |
26e21efc WD |
628 | if (!(module_chdir = normalize_path(module_dir, False, NULL))) |
629 | return path_failure(f_out, module_dir, False); | |
630 | full_module_path = module_chdir; | |
631 | module_dir = "/"; | |
632 | module_dirlen = 1; | |
433c6753 | 633 | } |
26e21efc WD |
634 | } else { |
635 | if (!(module_chdir = normalize_path(module_dir, False, &module_dirlen))) | |
636 | return path_failure(f_out, module_dir, False); | |
637 | full_module_path = module_dir = module_chdir; | |
638 | } | |
0a9fbe17 | 639 | set_env_str("RSYNC_MODULE_PATH", full_module_path); |
2fe1feea WD |
640 | |
641 | if (module_dirlen == 1) { | |
e7bf7c01 | 642 | module_dirlen = 0; |
7842418b | 643 | set_filter_dir("/", 1); |
46bffd98 | 644 | } else |
33cbd577 | 645 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
646 | |
647 | p = lp_filter(i); | |
c8fa85b2 | 648 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 649 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3); |
837cbad9 | 650 | |
cd64343a | 651 | p = lp_include_from(i); |
c8fa85b2 | 652 | parse_filter_file(&daemon_filter_list, p, rule_template(FILTRULE_INCLUDE), |
f5aeb6ff | 653 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
654 | |
655 | p = lp_include(i); | |
c8fa85b2 MM |
656 | parse_filter_str(&daemon_filter_list, p, |
657 | rule_template(FILTRULE_INCLUDE | FILTRULE_WORD_SPLIT), | |
f5aeb6ff | 658 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
cd64343a | 659 | |
8f3a2d54 | 660 | p = lp_exclude_from(i); |
c8fa85b2 | 661 | parse_filter_file(&daemon_filter_list, p, rule_template(0), |
f5aeb6ff | 662 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 663 | |
5805327b | 664 | p = lp_exclude(i); |
c8fa85b2 | 665 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 666 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
8f3a2d54 | 667 | |
6dc9b74b | 668 | log_init(1); |
1a016bfd | 669 | |
9d0d18b5 | 670 | #ifdef HAVE_PUTENV |
c95ca2a2 | 671 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 | 672 | int status; |
2fe1feea | 673 | |
9d0d18b5 | 674 | umask(orig_umask); |
c95ca2a2 WD |
675 | /* For post-xfer exec, fork a new process to run the rsync |
676 | * daemon while this process waits for the exit status and | |
677 | * runs the indicated command at that point. */ | |
678 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
679 | pid_t pid = fork(); |
680 | if (pid < 0) { | |
681 | rsyserr(FLOG, errno, "fork failed"); | |
682 | io_printf(f_out, "@ERROR: fork failed\n"); | |
683 | return -1; | |
684 | } | |
685 | if (pid) { | |
0a9fbe17 | 686 | set_env_num("RSYNC_PID", (long)pid); |
c95ca2a2 WD |
687 | if (wait_process(pid, &status, 0) < 0) |
688 | status = -1; | |
0a9fbe17 | 689 | set_env_num("RSYNC_RAW_STATUS", status); |
9d0d18b5 WD |
690 | if (WIFEXITED(status)) |
691 | status = WEXITSTATUS(status); | |
692 | else | |
693 | status = -1; | |
0a9fbe17 | 694 | set_env_num("RSYNC_EXIT_STATUS", status); |
94112924 WD |
695 | if (system(lp_postxfer_exec(i)) < 0) |
696 | status = -1; | |
9d0d18b5 WD |
697 | _exit(status); |
698 | } | |
699 | } | |
c95ca2a2 WD |
700 | /* For pre-xfer exec, fork a child process to run the indicated |
701 | * command, though it first waits for the parent process to | |
702 | * send us the user's request via a pipe. */ | |
703 | if (*lp_prexfer_exec(i)) { | |
704 | int fds[2]; | |
0a9fbe17 | 705 | set_env_num("RSYNC_PID", (long)getpid()); |
c95ca2a2 WD |
706 | if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) { |
707 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); | |
708 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
709 | return -1; | |
710 | } | |
711 | if (pre_exec_pid == 0) { | |
141c6265 WD |
712 | char buf[BIGPATHBUFLEN]; |
713 | int j, len; | |
c95ca2a2 WD |
714 | close(fds[1]); |
715 | set_blocking(fds[0]); | |
141c6265 | 716 | len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN); |
c95ca2a2 WD |
717 | if (len <= 0) |
718 | _exit(1); | |
0a9fbe17 | 719 | set_env_str("RSYNC_REQUEST", buf); |
141c6265 WD |
720 | for (j = 0; ; j++) { |
721 | len = read_arg_from_pipe(fds[0], buf, | |
722 | BIGPATHBUFLEN); | |
723 | if (len <= 0) { | |
724 | if (!len) | |
725 | break; | |
726 | _exit(1); | |
727 | } | |
503114a7 WD |
728 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0) |
729 | putenv(p); | |
141c6265 WD |
730 | } |
731 | close(fds[0]); | |
c95ca2a2 WD |
732 | close(STDIN_FILENO); |
733 | close(STDOUT_FILENO); | |
734 | status = system(lp_prexfer_exec(i)); | |
735 | if (!WIFEXITED(status)) | |
736 | _exit(1); | |
737 | _exit(WEXITSTATUS(status)); | |
738 | } | |
739 | close(fds[0]); | |
740 | set_blocking(fds[1]); | |
741 | pre_exec_fd = fds[1]; | |
742 | } | |
9d0d18b5 WD |
743 | umask(0); |
744 | } | |
745 | #endif | |
746 | ||
8638dd48 | 747 | if (use_chroot) { |
b52c1d9d MP |
748 | /* |
749 | * XXX: The 'use chroot' flag is a fairly reliable | |
750 | * source of confusion, because it fails under two | |
751 | * important circumstances: running as non-root, | |
752 | * running on Win32 (or possibly others). On the | |
753 | * other hand, if you are running as root, then it | |
754 | * might be better to always use chroot. | |
755 | * | |
756 | * So, perhaps if we can't chroot we should just issue | |
757 | * a warning, unless a "require chroot" flag is set, | |
758 | * in which case we fail. | |
759 | */ | |
433c6753 WD |
760 | if (chroot(module_chdir)) { |
761 | rsyserr(FLOG, errno, "chroot %s failed", module_chdir); | |
68f40ebb | 762 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
763 | return -1; |
764 | } | |
433c6753 | 765 | module_chdir = module_dir; |
716baed7 DD |
766 | } |
767 | ||
26e21efc WD |
768 | if (!change_dir(module_chdir, CD_NORMAL)) |
769 | return path_failure(f_out, module_chdir, True); | |
433c6753 WD |
770 | if (module_dirlen || !use_chroot) |
771 | sanitize_paths = 1; | |
772 | ||
9585b276 | 773 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 774 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
775 | if (munge_symlinks) { |
776 | STRUCT_STAT st; | |
41adbcec WD |
777 | char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */ |
778 | strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */ | |
779 | if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) { | |
780 | rprintf(FLOG, "Symlink munging is unsafe when a %s directory exists.\n", | |
781 | prefix); | |
9585b276 WD |
782 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); |
783 | exit_cleanup(RERR_UNSUPPORTED); | |
784 | } | |
785 | } | |
786 | ||
7f367bb1 WD |
787 | if (gid_count) { |
788 | if (setgid(gid_list[0])) { | |
789 | rsyserr(FLOG, errno, "setgid %ld failed", (long)gid_list[0]); | |
68f40ebb | 790 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
791 | return -1; |
792 | } | |
4f5b0756 | 793 | #ifdef HAVE_SETGROUPS |
7f367bb1 WD |
794 | /* Set the group(s) we want to be active. */ |
795 | if (setgroups(gid_count, gid_list)) { | |
1732b6c0 | 796 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
797 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
798 | return -1; | |
799 | } | |
800 | #endif | |
7f367bb1 WD |
801 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
802 | /* pw is set if the user wants all the user's groups. */ | |
803 | if (pw && initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
804 | rsyserr(FLOG, errno, "initgroups failed"); | |
805 | io_printf(f_out, "@ERROR: initgroups failed\n"); | |
806 | return -1; | |
807 | } | |
808 | #endif | |
809 | } | |
3591c066 | 810 | |
7f367bb1 | 811 | if (set_uid) { |
d23cc156 | 812 | if (setuid(uid) || seteuid(uid)) { |
7f367bb1 | 813 | rsyserr(FLOG, errno, "setuid %ld failed", (long)uid); |
68f40ebb | 814 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
815 | return -1; |
816 | } | |
817 | ||
6fe05820 | 818 | am_root = (MY_UID() == 0); |
3591c066 AT |
819 | } |
820 | ||
fed1f3f4 WD |
821 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
822 | tmpdir = lp_temp_dir(i); | |
823 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
824 | rprintf(FLOG, | |
825 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
826 | name); | |
827 | tmpdir = NULL; | |
828 | } | |
829 | } | |
830 | ||
68f40ebb | 831 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 832 | |
53936ef9 WD |
833 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
834 | orig_argv = argv; | |
835 | ||
41adbcec WD |
836 | save_munge_symlinks = munge_symlinks; |
837 | ||
951e826b | 838 | reset_output_levels(); /* future verbosity is controlled by client options */ |
53936ef9 WD |
839 | ret = parse_arguments(&argc, (const char ***) &argv); |
840 | if (protect_args && ret) { | |
841 | orig_early_argv = orig_argv; | |
842 | protect_args = 2; | |
843 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
844 | orig_argv = argv; | |
845 | ret = parse_arguments(&argc, (const char ***) &argv); | |
846 | } else | |
847 | orig_early_argv = NULL; | |
3591c066 | 848 | |
41adbcec WD |
849 | munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */ |
850 | ||
141c6265 WD |
851 | if (pre_exec_pid) { |
852 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request, | |
53936ef9 | 853 | orig_early_argv, orig_argv); |
141c6265 | 854 | } |
c95ca2a2 | 855 | |
53936ef9 WD |
856 | if (orig_early_argv) |
857 | free(orig_early_argv); | |
858 | ||
875a13b4 | 859 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 860 | quiet = 0; |
3162ea6f WD |
861 | if (lp_ignore_errors(module_id)) |
862 | ignore_errors = 1; | |
5223b786 WD |
863 | if (write_batch < 0) |
864 | dry_run = 1; | |
3591c066 | 865 | |
cbbd8e2e WD |
866 | if (lp_fake_super(i)) { |
867 | if (preserve_xattrs > 1) | |
868 | preserve_xattrs = 1; | |
9439c0cb | 869 | am_root = -1; |
cbbd8e2e | 870 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
871 | am_root = 2; |
872 | ||
7c2a9e76 WD |
873 | if (filesfrom_fd == 0) |
874 | filesfrom_fd = f_in; | |
875 | ||
7b372642 | 876 | if (request) { |
97cb8dc2 | 877 | if (*auth_user) { |
9e5a5ddb WD |
878 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
879 | am_sender ? "on" : "to", | |
97cb8dc2 | 880 | request, auth_user, host, addr); |
d0d56395 | 881 | } else { |
9e5a5ddb WD |
882 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
883 | am_sender ? "on" : "to", | |
d0d56395 AT |
884 | request, host, addr); |
885 | } | |
7b372642 AT |
886 | free(request); |
887 | } | |
888 | ||
15b7b73d | 889 | #ifndef DEBUG |
3591c066 | 890 | /* don't allow the logs to be flooded too fast */ |
951e826b | 891 | limit_output_verbosity(lp_max_verbosity(i)); |
0199b05f | 892 | #endif |
3591c066 | 893 | |
1732b6c0 WD |
894 | if (protocol_version < 23 |
895 | && (protocol_version == 22 || am_sender)) | |
d8587b46 | 896 | io_start_multiplex_out(f_out); |
c95ca2a2 | 897 | else if (!ret || err_msg) { |
1732b6c0 WD |
898 | /* We have to get I/O multiplexing started so that we can |
899 | * get the error back to the client. This means getting | |
900 | * the protocol setup finished first in later versions. */ | |
901 | setup_protocol(f_out, f_in); | |
b03c719f WD |
902 | if (!am_sender) { |
903 | /* Since we failed in our option parsing, we may not | |
904 | * have finished parsing that the client sent us a | |
905 | * --files-from option, so look for it manually. | |
906 | * Without this, the socket would be in the wrong | |
907 | * state for the upcoming error message. */ | |
908 | if (!files_from) { | |
909 | int i; | |
910 | for (i = 0; i < argc; i++) { | |
911 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
912 | files_from = ""; | |
913 | break; | |
914 | } | |
915 | } | |
916 | } | |
917 | if (files_from) | |
918 | write_byte(f_out, 0); | |
919 | } | |
d8587b46 | 920 | io_start_multiplex_out(f_out); |
554e0a8d | 921 | } |
15b7b73d | 922 | |
c95ca2a2 WD |
923 | if (!ret || err_msg) { |
924 | if (err_msg) | |
332cf6df | 925 | rwrite(FERROR, err_msg, strlen(err_msg), 0); |
c95ca2a2 WD |
926 | else |
927 | option_error(); | |
7e561438 | 928 | msleep(400); |
4a7144ee | 929 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
930 | } |
931 | ||
15dbffc2 | 932 | #ifdef ICONV_OPTION |
0b52f94d WD |
933 | if (!iconv_opt) { |
934 | if (ic_send != (iconv_t)-1) { | |
935 | iconv_close(ic_send); | |
936 | ic_send = (iconv_t)-1; | |
937 | } | |
938 | if (ic_recv != (iconv_t)-1) { | |
939 | iconv_close(ic_recv); | |
940 | ic_recv = (iconv_t)-1; | |
941 | } | |
942 | } | |
15dbffc2 | 943 | #endif |
0b52f94d WD |
944 | |
945 | if (!numeric_ids | |
946 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
947 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
948 | ||
8b3e6fb9 | 949 | if (lp_timeout(i) && (!io_timeout || lp_timeout(i) < io_timeout)) |
3e6ddb37 | 950 | set_io_timeout(lp_timeout(i)); |
81791cfc | 951 | |
f041b025 WD |
952 | /* If we have some incoming/outgoing chmod changes, append them to |
953 | * any user-specified changes (making our changes have priority). | |
954 | * We also get a pointer to just our changes so that a receiver | |
955 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
956 | if (am_sender) |
957 | p = lp_outgoing_chmod(i); | |
958 | else | |
959 | p = lp_incoming_chmod(i); | |
8840ec0f | 960 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
961 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
962 | am_sender ? "outgo" : "incom", p); | |
963 | } | |
730df9d2 | 964 | |
c9dc1300 | 965 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
966 | |
967 | return 0; | |
968 | } | |
969 | ||
7a6421fa AT |
970 | /* send a list of available modules to the client. Don't list those |
971 | with "list = False". */ | |
3591c066 AT |
972 | static void send_listing(int fd) |
973 | { | |
b583594a | 974 | int n = lp_num_modules(); |
3591c066 | 975 | int i; |
063393d6 | 976 | |
c0422cea | 977 | for (i = 0; i < n; i++) { |
3591c066 | 978 | if (lp_list(i)) |
4a7144ee | 979 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 980 | } |
8f04bb36 | 981 | |
daa598df | 982 | if (protocol_version >= 25) |
063393d6 | 983 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
984 | } |
985 | ||
d1c06c21 WD |
986 | static int load_config(int globals_only) |
987 | { | |
988 | if (!config_file) { | |
989 | if (am_server && am_root <= 0) | |
990 | config_file = RSYNCD_USERCONF; | |
991 | else | |
992 | config_file = RSYNCD_SYSCONF; | |
993 | } | |
994 | return lp_load(config_file, globals_only); | |
995 | } | |
996 | ||
68f40ebb | 997 | /* this is called when a connection is established to a client |
3591c066 AT |
998 | and we want to start talking. The setup of the system is done from |
999 | here */ | |
68f40ebb | 1000 | int start_daemon(int f_in, int f_out) |
3591c066 | 1001 | { |
20accf4d | 1002 | char line[1024]; |
df694f72 | 1003 | const char *addr, *host; |
c0422cea | 1004 | int i; |
4cdf25e4 | 1005 | |
da3478b2 WD |
1006 | io_set_sock_fds(f_in, f_out); |
1007 | ||
374c3e12 WD |
1008 | /* We must load the config file before calling any function that |
1009 | * might cause log-file output to occur. This ensures that the | |
1010 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 1011 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 1012 | if (!load_config(0)) |
65417579 | 1013 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 1014 | |
374c3e12 | 1015 | addr = client_addr(f_in); |
11ef77b7 | 1016 | host = lp_reverse_lookup(-1) ? client_name(f_in) : undetermined_hostname; |
374c3e12 | 1017 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); |
91d324b4 | 1018 | |
68f40ebb WD |
1019 | if (!am_server) { |
1020 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
68f40ebb WD |
1021 | set_nonblocking(f_in); |
1022 | } | |
3591c066 | 1023 | |
7909e65f | 1024 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 1025 | return -1; |
91eee594 | 1026 | |
c0422cea | 1027 | line[0] = 0; |
7909e65f | 1028 | if (!read_line_old(f_in, line, sizeof line)) |
c0422cea | 1029 | return -1; |
3591c066 | 1030 | |
c0422cea | 1031 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
1032 | rprintf(FLOG, "module-list request from %s (%s)\n", |
1033 | host, addr); | |
c0422cea WD |
1034 | send_listing(f_out); |
1035 | return -1; | |
1036 | } | |
3591c066 | 1037 | |
c0422cea WD |
1038 | if (*line == '#') { |
1039 | /* it's some sort of command that I don't understand */ | |
1040 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
1041 | return -1; | |
1042 | } | |
3591c066 | 1043 | |
c0422cea | 1044 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
1045 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
1046 | line, host, addr); | |
1047 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
1048 | return -1; | |
3591c066 AT |
1049 | } |
1050 | ||
d749eb68 WD |
1051 | #ifdef HAVE_SIGACTION |
1052 | sigact.sa_flags = SA_NOCLDSTOP; | |
1053 | #endif | |
1054 | SIGACTION(SIGCHLD, remember_children); | |
1055 | ||
439a198d | 1056 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
1057 | } |
1058 | ||
dd589118 | 1059 | static void create_pid_file(void) |
a1d2685b WD |
1060 | { |
1061 | char *pid_file = lp_pid_file(); | |
1062 | char pidbuf[16]; | |
dd589118 | 1063 | pid_t pid = getpid(); |
94112924 | 1064 | int fd, len; |
a1d2685b WD |
1065 | |
1066 | if (!pid_file || !*pid_file) | |
1067 | return; | |
1068 | ||
1069 | cleanup_set_pid(pid); | |
dd589118 | 1070 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) { |
94112924 | 1071 | failure: |
a1d2685b | 1072 | cleanup_set_pid(0); |
dd589118 | 1073 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
1074 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
1075 | exit_cleanup(RERR_FILEIO); | |
1076 | } | |
1077 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); | |
94112924 WD |
1078 | len = strlen(pidbuf); |
1079 | if (write(fd, pidbuf, len) != len) | |
1080 | goto failure; | |
a1d2685b WD |
1081 | close(fd); |
1082 | } | |
1083 | ||
1084 | /* Become a daemon, discarding the controlling terminal. */ | |
1085 | static void become_daemon(void) | |
3591c066 | 1086 | { |
a1d2685b WD |
1087 | int i; |
1088 | pid_t pid = fork(); | |
1089 | ||
1090 | if (pid) { | |
dd589118 WD |
1091 | if (pid < 0) { |
1092 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1093 | exit_cleanup(RERR_FILEIO); | |
1094 | } | |
a1d2685b WD |
1095 | _exit(0); |
1096 | } | |
1a016bfd | 1097 | |
dd589118 WD |
1098 | create_pid_file(); |
1099 | ||
a1d2685b WD |
1100 | /* detach from the terminal */ |
1101 | #ifdef HAVE_SETSID | |
1102 | setsid(); | |
1103 | #elif defined TIOCNOTTY | |
1104 | i = open("/dev/tty", O_RDWR); | |
1105 | if (i >= 0) { | |
1106 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1107 | close(i); | |
1108 | } | |
1109 | #endif | |
1110 | /* make sure that stdin, stdout an stderr don't stuff things | |
1111 | * up (library functions, for example) */ | |
1112 | for (i = 0; i < 3; i++) { | |
1113 | close(i); | |
1114 | open("/dev/null", O_RDWR); | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | int daemon_main(void) | |
1119 | { | |
3591c066 | 1120 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1121 | int i; |
1122 | ||
1123 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1124 | * stderr so that library functions (and getopt) don't |
1125 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1126 | for (i = 1; i < 3; i++) { |
4a7144ee | 1127 | close(i); |
41979ff8 AT |
1128 | open("/dev/null", O_RDWR); |
1129 | } | |
3eb38818 | 1130 | |
68f40ebb | 1131 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1132 | } |
1133 | ||
d1c06c21 | 1134 | if (!load_config(1)) { |
a1d2685b | 1135 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1136 | exit_cleanup(RERR_SYNTAX); |
a1d2685b | 1137 | } |
2206abf8 | 1138 | set_dparams(0); |
a1d2685b WD |
1139 | |
1140 | if (no_detach) | |
dd589118 | 1141 | create_pid_file(); |
a1d2685b WD |
1142 | else |
1143 | become_daemon(); | |
f9e940ef | 1144 | |
0c56b1ad WD |
1145 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1146 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1147 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1148 | bind_address = lp_bind_address(); |
0c56b1ad | 1149 | |
6dc9b74b | 1150 | log_init(0); |
f9e940ef | 1151 | |
9e5a5ddb | 1152 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1153 | RSYNC_VERSION, rsync_port); |
1154 | /* TODO: If listening on a particular address, then show that | |
1155 | * address too. In fact, why not just do inet_ntop on the | |
1156 | * local address??? */ | |
e42c9458 | 1157 | |
8ef4ffd6 AT |
1158 | start_accept_loop(rsync_port, start_daemon); |
1159 | return -1; | |
3591c066 | 1160 | } |