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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> | |
453914e3 | 6 | * Copyright (C) 2002-2015 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 WD |
62 | |
63 | char *auth_user; | |
18638730 | 64 | int read_only = 0; |
211bc43b | 65 | int module_id = -1; |
8840ec0f | 66 | struct chmod_mode_struct *daemon_chmod_modes; |
3591c066 | 67 | |
33cbd577 | 68 | /* module_dirlen is the length of the module_dir string when in daemon |
2fe1feea WD |
69 | * mode and module_dir is not "/"; otherwise 0. (Note that a chroot- |
70 | * enabled module can have a non-"/" module_dir these days.) */ | |
33cbd577 | 71 | char *module_dir = NULL; |
e7bf7c01 WD |
72 | unsigned int module_dirlen = 0; |
73 | ||
26e21efc WD |
74 | char *full_module_path; |
75 | ||
7909e65f WD |
76 | static int rl_nulls = 0; |
77 | ||
d749eb68 WD |
78 | #ifdef HAVE_SIGACTION |
79 | static struct sigaction sigact; | |
80 | #endif | |
81 | ||
2a7355fb | 82 | static item_list gid_list = EMPTY_ITEM_LIST; |
7f367bb1 | 83 | |
11ef77b7 MM |
84 | /* Used when "reverse lookup" is off. */ |
85 | const char undetermined_hostname[] = "UNDETERMINED"; | |
86 | ||
be2961da | 87 | /** |
bc363ea9 | 88 | * Run a client connected to an rsyncd. The alternative to this |
be2961da MP |
89 | * function for remote-shell connections is do_cmd(). |
90 | * | |
fdf88d75 MP |
91 | * After negotiating which module to use and reading the server's |
92 | * motd, this hands over to client_run(). Telling the server the | |
93 | * module will cause it to chroot/setuid/etc. | |
94 | * | |
95 | * Instead of doing a transfer, the client may at this stage instead | |
96 | * get a listing of remote modules and exit. | |
be2961da MP |
97 | * |
98 | * @return -1 for error in startup, or the result of client_run(). | |
d0829892 | 99 | * Either way, it eventually gets passed to exit_cleanup(). |
be2961da | 100 | **/ |
7909e65f WD |
101 | int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
102 | int argc, char *argv[]) | |
3591c066 | 103 | { |
68f40ebb | 104 | int fd, ret; |
2e94e70e | 105 | char *p, *user = NULL; |
4a7144ee | 106 | |
1732b6c0 WD |
107 | /* This is redundant with code in start_inband_exchange(), but this |
108 | * short-circuits a problem in the client before we open a socket, | |
109 | * and the extra check won't hurt. */ | |
7909e65f | 110 | if (**remote_argv == '/') { |
1732b6c0 WD |
111 | rprintf(FERROR, |
112 | "ERROR: The remote path must start with a module name not a /\n"); | |
f98df1d9 AT |
113 | return -1; |
114 | } | |
115 | ||
b31c92ed | 116 | if ((p = strrchr(host, '@')) != NULL) { |
bcb7e502 AT |
117 | user = host; |
118 | host = p+1; | |
1732b6c0 | 119 | *p = '\0'; |
bcb7e502 AT |
120 | } |
121 | ||
837cbad9 WD |
122 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
123 | default_af_hint); | |
df5cd107 | 124 | if (fd == -1) |
65417579 | 125 | exit_cleanup(RERR_SOCKETIO); |
68f40ebb | 126 | |
5b3aa802 WD |
127 | #ifdef ICONV_CONST |
128 | setup_iconv(); | |
129 | #endif | |
130 | ||
7909e65f | 131 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
68f40ebb | 132 | |
180443af | 133 | return ret ? ret : client_run(fd, fd, -1, argc, argv); |
68f40ebb WD |
134 | } |
135 | ||
7909e65f WD |
136 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
137 | { | |
138 | int remote_sub = -1; | |
139 | #if SUBPROTOCOL_VERSION != 0 | |
140 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
141 | #else | |
142 | int our_sub = 0; | |
143 | #endif | |
144 | char *motd; | |
145 | ||
146 | io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub); | |
147 | ||
148 | if (!am_client) { | |
149 | motd = lp_motd_file(); | |
150 | if (motd && *motd) { | |
151 | FILE *f = fopen(motd,"r"); | |
152 | while (f && !feof(f)) { | |
153 | int len = fread(buf, 1, bufsiz - 1, f); | |
154 | if (len > 0) | |
155 | write_buf(f_out, buf, len); | |
156 | } | |
157 | if (f) | |
158 | fclose(f); | |
159 | write_sbuf(f_out, "\n"); | |
160 | } | |
161 | } | |
162 | ||
163 | /* This strips the \n. */ | |
5ebe9a46 | 164 | if (!read_line_old(f_in, buf, bufsiz, 0)) { |
7909e65f WD |
165 | if (am_client) |
166 | rprintf(FERROR, "rsync: did not see server greeting\n"); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) { | |
171 | if (am_client) | |
172 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf); | |
173 | else | |
174 | io_printf(f_out, "@ERROR: protocol startup error\n"); | |
175 | return -1; | |
176 | } | |
177 | ||
178 | if (remote_sub < 0) { | |
179 | if (remote_protocol == 30) { | |
180 | if (am_client) | |
181 | rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n"); | |
182 | else | |
183 | io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n"); | |
184 | return -1; | |
185 | } | |
186 | remote_sub = 0; | |
187 | } | |
188 | ||
189 | if (protocol_version > remote_protocol) { | |
190 | protocol_version = remote_protocol; | |
191 | if (remote_sub) | |
192 | protocol_version--; | |
193 | } else if (protocol_version == remote_protocol) { | |
194 | if (remote_sub != our_sub) | |
195 | protocol_version--; | |
196 | } | |
197 | #if SUBPROTOCOL_VERSION != 0 | |
198 | else if (protocol_version < remote_protocol) { | |
199 | if (our_sub) | |
200 | protocol_version--; | |
201 | } | |
202 | #endif | |
203 | ||
204 | if (protocol_version >= 30) | |
205 | rl_nulls = 1; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[]) | |
68f40ebb | 211 | { |
e844a4a8 | 212 | int i, modlen; |
7909e65f | 213 | char line[BIGPATHBUFLEN]; |
68f40ebb WD |
214 | char *sargs[MAX_ARGS]; |
215 | int sargc = 0; | |
e844a4a8 | 216 | char *p, *modname; |
68f40ebb | 217 | |
d4c5cb2b | 218 | assert(argc > 0 && *argv != NULL); |
68f40ebb | 219 | |
e844a4a8 | 220 | if (**argv == '/') { |
1732b6c0 WD |
221 | rprintf(FERROR, |
222 | "ERROR: The remote path must start with a module name\n"); | |
68f40ebb WD |
223 | return -1; |
224 | } | |
225 | ||
e844a4a8 WD |
226 | if (!(p = strchr(*argv, '/'))) |
227 | modlen = strlen(*argv); | |
228 | else | |
229 | modlen = p - *argv; | |
230 | ||
231 | if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */ | |
232 | out_of_memory("start_inband_exchange"); | |
233 | strlcpy(modname, *argv, modlen + 1); | |
234 | modname[modlen] = '/'; | |
235 | modname[modlen+1] = '\0'; | |
236 | ||
2e94e70e WD |
237 | if (!user) |
238 | user = getenv("USER"); | |
239 | if (!user) | |
240 | user = getenv("LOGNAME"); | |
68f40ebb | 241 | |
7909e65f | 242 | if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0) |
3591c066 | 243 | return -1; |
3591c066 | 244 | |
9bcb2595 WD |
245 | /* set daemon_over_rsh to false since we need to build the |
246 | * true set of args passed through the rsh/ssh connection; | |
247 | * this is a no-op for direct-socket-connection mode */ | |
248 | daemon_over_rsh = 0; | |
249 | server_options(sargs, &sargc); | |
250 | ||
7909e65f WD |
251 | if (sargc >= MAX_ARGS - 2) |
252 | goto arg_overflow; | |
253 | ||
9bcb2595 WD |
254 | sargs[sargc++] = "."; |
255 | ||
7909e65f WD |
256 | while (argc > 0) { |
257 | if (sargc >= MAX_ARGS - 1) { | |
258 | arg_overflow: | |
259 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); | |
260 | exit_cleanup(RERR_SYNTAX); | |
261 | } | |
d348d5fd | 262 | if (strncmp(*argv, modname, modlen) == 0 |
e844a4a8 WD |
263 | && argv[0][modlen] == '\0') |
264 | sargs[sargc++] = modname; /* we send "modname/" */ | |
8f30d215 WD |
265 | else if (**argv == '-') { |
266 | if (asprintf(sargs + sargc++, "./%s", *argv) < 0) | |
267 | out_of_memory("start_inband_exchange"); | |
268 | } else | |
e844a4a8 WD |
269 | sargs[sargc++] = *argv; |
270 | argv++; | |
7909e65f WD |
271 | argc--; |
272 | } | |
9bcb2595 WD |
273 | |
274 | sargs[sargc] = NULL; | |
275 | ||
951e826b | 276 | if (DEBUG_GTE(CMD, 1)) |
0b515981 | 277 | print_child_argv("sending daemon args:", sargs); |
9bcb2595 | 278 | |
e844a4a8 | 279 | io_printf(f_out, "%.*s\n", modlen, modname); |
2c91d3d3 | 280 | |
063393d6 MP |
281 | /* Old servers may just drop the connection here, |
282 | rather than sending a proper EXIT command. Yuck. */ | |
8dad7fc6 | 283 | kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0; |
7a55d06e | 284 | |
063393d6 | 285 | while (1) { |
5ebe9a46 | 286 | if (!read_line_old(f_in, line, sizeof line, 0)) { |
be2961da | 287 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
3591c066 AT |
288 | return -1; |
289 | } | |
31593dd6 | 290 | |
31593dd6 | 291 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
68f40ebb | 292 | auth_client(f_out, user, line+18); |
31593dd6 AT |
293 | continue; |
294 | } | |
31593dd6 | 295 | |
2e94e70e WD |
296 | if (strcmp(line,"@RSYNCD: OK") == 0) |
297 | break; | |
8f04bb36 | 298 | |
cae95647 MP |
299 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
300 | /* This is sent by recent versions of the | |
301 | * server to terminate the listing of modules. | |
302 | * We don't want to go on and transfer | |
303 | * anything; just exit. */ | |
304 | exit(0); | |
305 | } | |
8f04bb36 | 306 | |
136ac7ec | 307 | if (strncmp(line, "@ERROR", 6) == 0) { |
1732b6c0 | 308 | rprintf(FERROR, "%s\n", line); |
136ac7ec MP |
309 | /* This is always fatal; the server will now |
310 | * close the socket. */ | |
180443af | 311 | return -1; |
136ac7ec | 312 | } |
180443af | 313 | |
9ce7fc38 WD |
314 | /* This might be a MOTD line or a module listing, but there is |
315 | * no way to differentiate it. The manpage mentions this. */ | |
316 | if (output_motd) | |
317 | rprintf(FINFO, "%s\n", line); | |
3591c066 | 318 | } |
8dad7fc6 | 319 | kluge_around_eof = 0; |
3591c066 | 320 | |
7909e65f WD |
321 | if (rl_nulls) { |
322 | for (i = 0; i < sargc; i++) { | |
53936ef9 WD |
323 | if (!sargs[i]) /* stop at --protect-args NULL */ |
324 | break; | |
7909e65f WD |
325 | write_sbuf(f_out, sargs[i]); |
326 | write_byte(f_out, 0); | |
327 | } | |
328 | write_byte(f_out, 0); | |
329 | } else { | |
330 | for (i = 0; i < sargc; i++) | |
331 | io_printf(f_out, "%s\n", sargs[i]); | |
332 | write_sbuf(f_out, "\n"); | |
3591c066 | 333 | } |
3591c066 | 334 | |
53936ef9 WD |
335 | if (protect_args) |
336 | send_protected_args(f_out, sargs); | |
337 | ||
daa598df | 338 | if (protocol_version < 23) { |
3f55bd5d | 339 | if (protocol_version == 22 || !am_sender) |
d8587b46 | 340 | io_start_multiplex_in(f_in); |
09b7f5db | 341 | } |
8d9dc9f9 | 342 | |
e844a4a8 WD |
343 | free(modname); |
344 | ||
68f40ebb | 345 | return 0; |
3591c066 AT |
346 | } |
347 | ||
820f7a7b | 348 | static char *finish_pre_exec(pid_t pid, int write_fd, int read_fd, char *request, |
53936ef9 | 349 | char **early_argv, char **argv) |
c95ca2a2 | 350 | { |
820f7a7b WD |
351 | char buf[BIGPATHBUFLEN], *bp; |
352 | int j = 0, status = -1, msglen = sizeof buf - 1; | |
3591c066 | 353 | |
7909e65f WD |
354 | if (!request) |
355 | request = "(NONE)"; | |
141c6265 | 356 | |
820f7a7b | 357 | write_buf(write_fd, request, strlen(request)+1); |
53936ef9 WD |
358 | if (early_argv) { |
359 | for ( ; *early_argv; early_argv++) | |
820f7a7b | 360 | write_buf(write_fd, *early_argv, strlen(*early_argv)+1); |
53936ef9 WD |
361 | j = 1; /* Skip arg0 name in argv. */ |
362 | } | |
ee51a745 | 363 | for ( ; argv[j]; j++) |
820f7a7b | 364 | write_buf(write_fd, argv[j], strlen(argv[j])+1); |
820f7a7b | 365 | write_byte(write_fd, 0); |
141c6265 | 366 | |
820f7a7b WD |
367 | close(write_fd); |
368 | ||
369 | /* Read the stdout from the pre-xfer exec program. This it is only | |
370 | * displayed to the user if the script also returns an error status. */ | |
e3bc529d WD |
371 | for (bp = buf; msglen > 0; msglen -= j) { |
372 | if ((j = read(read_fd, bp, msglen)) <= 0) { | |
373 | if (j == 0) | |
374 | break; | |
375 | if (errno == EINTR) | |
376 | continue; | |
377 | break; /* Just ignore the read error for now... */ | |
378 | } | |
820f7a7b WD |
379 | bp += j; |
380 | if (j > 1 && bp[-1] == '\n' && bp[-2] == '\r') { | |
381 | bp--; | |
382 | j--; | |
383 | bp[-1] = '\n'; | |
384 | } | |
385 | } | |
386 | *bp = '\0'; | |
387 | ||
388 | close(read_fd); | |
c95ca2a2 WD |
389 | |
390 | if (wait_process(pid, &status, 0) < 0 | |
391 | || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
392 | char *e; | |
d80f7d6c | 393 | if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s%s\n%s", |
d0236360 | 394 | status, status < 0 ? ": " : "", |
d80f7d6c WD |
395 | status < 0 ? strerror(errno) : "", |
396 | *buf ? ":" : "", buf) < 0) | |
820f7a7b | 397 | return "out_of_memory in finish_pre_exec\n"; |
c95ca2a2 WD |
398 | return e; |
399 | } | |
400 | return NULL; | |
401 | } | |
3591c066 | 402 | |
0a9fbe17 | 403 | #ifdef HAVE_PUTENV |
141c6265 WD |
404 | static int read_arg_from_pipe(int fd, char *buf, int limit) |
405 | { | |
406 | char *bp = buf, *eob = buf + limit - 1; | |
407 | ||
408 | while (1) { | |
e8d6fe62 WD |
409 | int got = read(fd, bp, 1); |
410 | if (got != 1) { | |
411 | if (got < 0 && errno == EINTR) | |
412 | continue; | |
413 | return -1; | |
414 | } | |
415 | if (*bp == '\0') | |
416 | break; | |
417 | if (bp < eob) | |
418 | bp++; | |
141c6265 WD |
419 | } |
420 | *bp = '\0'; | |
421 | ||
422 | return bp - buf; | |
423 | } | |
0a9fbe17 | 424 | #endif |
141c6265 | 425 | |
26e21efc WD |
426 | static int path_failure(int f_out, const char *dir, BOOL was_chdir) |
427 | { | |
428 | if (was_chdir) | |
881addc9 | 429 | rsyserr(FLOG, errno, "chdir %s failed", dir); |
26e21efc WD |
430 | else |
431 | rprintf(FLOG, "normalize_path(%s) failed\n", dir); | |
432 | io_printf(f_out, "@ERROR: chdir failed\n"); | |
433 | return -1; | |
434 | } | |
435 | ||
7f367bb1 WD |
436 | static int add_a_group(int f_out, const char *gname) |
437 | { | |
2a7355fb | 438 | gid_t gid, *gid_p; |
56017d31 WD |
439 | if (!group_to_gid(gname, &gid, True)) { |
440 | rprintf(FLOG, "Invalid gid %s\n", gname); | |
441 | io_printf(f_out, "@ERROR: invalid gid %s\n", gname); | |
442 | return -1; | |
7f367bb1 | 443 | } |
2a7355fb WD |
444 | gid_p = EXPAND_ITEM_LIST(&gid_list, gid_t, -32); |
445 | *gid_p = gid; | |
7f367bb1 WD |
446 | return 0; |
447 | } | |
448 | ||
d7205694 WD |
449 | #ifdef HAVE_GETGROUPLIST |
450 | static int want_all_groups(int f_out, uid_t uid) | |
451 | { | |
452 | const char *err; | |
2a7355fb | 453 | if ((err = getallgroups(uid, &gid_list)) != NULL) { |
d7205694 WD |
454 | rsyserr(FLOG, errno, "%s", err); |
455 | io_printf(f_out, "@ERROR: %s\n", err); | |
456 | return -1; | |
457 | } | |
458 | return 0; | |
459 | } | |
460 | #elif defined HAVE_INITGROUPS | |
7f367bb1 WD |
461 | static struct passwd *want_all_groups(int f_out, uid_t uid) |
462 | { | |
7f367bb1 | 463 | struct passwd *pw; |
2a7355fb | 464 | gid_t *gid_p; |
7f367bb1 WD |
465 | if ((pw = getpwuid(uid)) == NULL) { |
466 | rsyserr(FLOG, errno, "getpwuid failed"); | |
467 | io_printf(f_out, "@ERROR: getpwuid failed\n"); | |
468 | return NULL; | |
469 | } | |
2a7355fb WD |
470 | /* Start with the default group and initgroups() will add the rest. */ |
471 | gid_p = EXPAND_ITEM_LIST(&gid_list, gid_t, -32); | |
472 | *gid_p = pw->pw_gid; | |
7f367bb1 | 473 | return pw; |
7f367bb1 | 474 | } |
d7205694 | 475 | #endif |
7f367bb1 | 476 | |
0a9fbe17 WD |
477 | static void set_env_str(const char *var, const char *str) |
478 | { | |
479 | #ifdef HAVE_PUTENV | |
480 | char *mem; | |
481 | if (asprintf(&mem, "%s=%s", var, str) < 0) | |
482 | out_of_memory("set_env_str"); | |
483 | putenv(mem); | |
484 | #endif | |
485 | } | |
486 | ||
487 | #ifdef HAVE_PUTENV | |
488 | static void set_env_num(const char *var, long num) | |
489 | { | |
490 | char *mem; | |
491 | if (asprintf(&mem, "%s=%ld", var, num) < 0) | |
492 | out_of_memory("set_env_num"); | |
493 | putenv(mem); | |
494 | } | |
495 | #endif | |
496 | ||
df694f72 | 497 | static int rsync_module(int f_in, int f_out, int i, const char *addr, const char *host) |
3591c066 | 498 | { |
53936ef9 | 499 | int argc; |
433c6753 | 500 | char **argv, **orig_argv, **orig_early_argv, *module_chdir; |
20accf4d | 501 | char line[BIGPATHBUFLEN]; |
d7205694 | 502 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
7f367bb1 | 503 | struct passwd *pw = NULL; |
d7205694 | 504 | #endif |
7f367bb1 WD |
505 | uid_t uid; |
506 | int set_uid; | |
c95ca2a2 | 507 | char *p, *err_msg = NULL; |
874895d5 | 508 | char *name = lp_name(i); |
8638dd48 | 509 | int use_chroot = lp_use_chroot(i); |
820f7a7b | 510 | int ret, pre_exec_arg_fd = -1, pre_exec_error_fd = -1; |
41adbcec | 511 | int save_munge_symlinks; |
c95ca2a2 | 512 | pid_t pre_exec_pid = 0; |
2e94e70e | 513 | char *request = NULL; |
56c473b7 | 514 | |
0a9fbe17 WD |
515 | set_env_str("RSYNC_MODULE_NAME", name); |
516 | ||
15dbffc2 | 517 | #ifdef ICONV_OPTION |
0b52f94d WD |
518 | iconv_opt = lp_charset(i); |
519 | if (*iconv_opt) | |
520 | setup_iconv(); | |
521 | iconv_opt = NULL; | |
522 | #endif | |
523 | ||
11ef77b7 MM |
524 | /* If reverse lookup is disabled globally but enabled for this module, |
525 | * we need to do it now before the access check. */ | |
526 | if (host == undetermined_hostname && lp_reverse_lookup(i)) | |
527 | host = client_name(f_in); | |
0a9fbe17 WD |
528 | set_env_str("RSYNC_HOST_NAME", host); |
529 | set_env_str("RSYNC_HOST_ADDR", addr); | |
11ef77b7 | 530 | |
bf4170ad | 531 | if (!allow_access(addr, &host, i)) { |
1732b6c0 | 532 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
31ec50d7 | 533 | name, host, addr); |
c0422cea WD |
534 | if (!lp_list(i)) |
535 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); | |
536 | else { | |
537 | io_printf(f_out, | |
538 | "@ERROR: access denied to %s from %s (%s)\n", | |
539 | name, host, addr); | |
540 | } | |
56c473b7 AT |
541 | return -1; |
542 | } | |
3591c066 | 543 | |
68f40ebb | 544 | if (am_daemon && am_server) { |
9e5a5ddb | 545 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
68f40ebb WD |
546 | name, host, addr); |
547 | } | |
548 | ||
5e71c444 | 549 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
8d72ef6e | 550 | if (errno) { |
1732b6c0 | 551 | rsyserr(FLOG, errno, "failed to open lock file %s", |
45c49b52 | 552 | lp_lock_file(i)); |
4875d6b6 | 553 | io_printf(f_out, "@ERROR: failed to open lock file\n"); |
8d72ef6e | 554 | } else { |
1732b6c0 | 555 | rprintf(FLOG, "max connections (%d) reached\n", |
5e71c444 | 556 | lp_max_connections(i)); |
4ccfd96c | 557 | io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n", |
837cbad9 | 558 | lp_max_connections(i)); |
8d72ef6e | 559 | } |
0c515f17 AT |
560 | return -1; |
561 | } | |
562 | ||
5ebe9a46 | 563 | read_only = lp_read_only(i); /* may also be overridden by auth_server() */ |
45c5b903 | 564 | auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD "); |
d0d56395 | 565 | |
97cb8dc2 | 566 | if (!auth_user) { |
68f40ebb | 567 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
4a7144ee | 568 | return -1; |
d0d56395 | 569 | } |
0a9fbe17 | 570 | set_env_str("RSYNC_USER_NAME", auth_user); |
d0d56395 | 571 | |
3591c066 AT |
572 | module_id = i; |
573 | ||
10ae3406 | 574 | if (lp_transfer_logging(i) && !logfile_format) |
ecc7623e | 575 | logfile_format = lp_log_format(i); |
10ae3406 WD |
576 | if (log_format_has(logfile_format, 'i')) |
577 | logfile_format_has_i = 1; | |
578 | if (logfile_format_has_i || log_format_has(logfile_format, 'o')) | |
579 | logfile_format_has_o_or_i = 1; | |
c0814b81 | 580 | |
7f367bb1 WD |
581 | uid = MY_UID(); |
582 | am_root = (uid == 0); | |
8ef4ffd6 | 583 | |
7f367bb1 WD |
584 | p = *lp_uid(i) ? lp_uid(i) : am_root ? NOBODY_USER : NULL; |
585 | if (p) { | |
56017d31 WD |
586 | if (!user_to_uid(p, &uid, True)) { |
587 | rprintf(FLOG, "Invalid uid %s\n", p); | |
588 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); | |
589 | return -1; | |
716baed7 | 590 | } |
7f367bb1 WD |
591 | set_uid = 1; |
592 | } else | |
593 | set_uid = 0; | |
716baed7 | 594 | |
9a12959a | 595 | p = *lp_gid(i) ? conf_strtok(lp_gid(i)) : NULL; |
7f367bb1 WD |
596 | if (p) { |
597 | /* The "*" gid must be the first item in the list. */ | |
598 | if (strcmp(p, "*") == 0) { | |
d7205694 WD |
599 | #ifdef HAVE_GETGROUPLIST |
600 | if (want_all_groups(f_out, uid) < 0) | |
601 | return -1; | |
602 | #elif defined HAVE_INITGROUPS | |
7f367bb1 WD |
603 | if ((pw = want_all_groups(f_out, uid)) == NULL) |
604 | return -1; | |
d7205694 WD |
605 | #else |
606 | rprintf(FLOG, "This rsync does not support a gid of \"*\"\n"); | |
607 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
608 | return -1; | |
609 | #endif | |
7f367bb1 WD |
610 | } else if (add_a_group(f_out, p) < 0) |
611 | return -1; | |
9a12959a | 612 | while ((p = conf_strtok(NULL)) != NULL) { |
7f367bb1 WD |
613 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
614 | if (pw) { | |
615 | rprintf(FLOG, "This rsync cannot add groups after \"*\".\n"); | |
616 | io_printf(f_out, "@ERROR: invalid gid setting.\n"); | |
716baed7 | 617 | return -1; |
4a7144ee | 618 | } |
7f367bb1 WD |
619 | #endif |
620 | if (add_a_group(f_out, p) < 0) | |
621 | return -1; | |
716baed7 | 622 | } |
7f367bb1 WD |
623 | } else if (am_root) { |
624 | if (add_a_group(f_out, NOBODY_GROUP) < 0) | |
625 | return -1; | |
8ef4ffd6 | 626 | } |
3b2b5345 | 627 | |
33cbd577 | 628 | module_dir = lp_path(i); |
afccb3d3 WD |
629 | if (*module_dir == '\0') { |
630 | rprintf(FLOG, "No path specified for module %s\n", name); | |
631 | io_printf(f_out, "@ERROR: no path setting.\n"); | |
632 | return -1; | |
633 | } | |
2fe1feea WD |
634 | if (use_chroot) { |
635 | if ((p = strstr(module_dir, "/./")) != NULL) { | |
26e21efc WD |
636 | *p = '\0'; /* Temporary... */ |
637 | if (!(module_chdir = normalize_path(module_dir, True, NULL))) | |
638 | return path_failure(f_out, module_dir, False); | |
639 | *p = '/'; | |
640 | if (!(p = normalize_path(p + 2, True, &module_dirlen))) | |
641 | return path_failure(f_out, strstr(module_dir, "/./"), False); | |
642 | if (!(full_module_path = normalize_path(module_dir, False, NULL))) | |
643 | full_module_path = module_dir; | |
433c6753 WD |
644 | module_dir = p; |
645 | } else { | |
26e21efc WD |
646 | if (!(module_chdir = normalize_path(module_dir, False, NULL))) |
647 | return path_failure(f_out, module_dir, False); | |
648 | full_module_path = module_chdir; | |
649 | module_dir = "/"; | |
650 | module_dirlen = 1; | |
433c6753 | 651 | } |
26e21efc WD |
652 | } else { |
653 | if (!(module_chdir = normalize_path(module_dir, False, &module_dirlen))) | |
654 | return path_failure(f_out, module_dir, False); | |
655 | full_module_path = module_dir = module_chdir; | |
656 | } | |
0a9fbe17 | 657 | set_env_str("RSYNC_MODULE_PATH", full_module_path); |
2fe1feea WD |
658 | |
659 | if (module_dirlen == 1) { | |
e7bf7c01 | 660 | module_dirlen = 0; |
7842418b | 661 | set_filter_dir("/", 1); |
46bffd98 | 662 | } else |
33cbd577 | 663 | set_filter_dir(module_dir, module_dirlen); |
e7bf7c01 WD |
664 | |
665 | p = lp_filter(i); | |
c8fa85b2 | 666 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 667 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3); |
837cbad9 | 668 | |
cd64343a | 669 | p = lp_include_from(i); |
c8fa85b2 | 670 | parse_filter_file(&daemon_filter_list, p, rule_template(FILTRULE_INCLUDE), |
f5aeb6ff | 671 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
cd64343a DD |
672 | |
673 | p = lp_include(i); | |
c8fa85b2 MM |
674 | parse_filter_str(&daemon_filter_list, p, |
675 | rule_template(FILTRULE_INCLUDE | FILTRULE_WORD_SPLIT), | |
f5aeb6ff | 676 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
cd64343a | 677 | |
8f3a2d54 | 678 | p = lp_exclude_from(i); |
c8fa85b2 | 679 | parse_filter_file(&daemon_filter_list, p, rule_template(0), |
f5aeb6ff | 680 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS); |
8f3a2d54 | 681 | |
5805327b | 682 | p = lp_exclude(i); |
c8fa85b2 | 683 | parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT), |
f5aeb6ff | 684 | XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES); |
8f3a2d54 | 685 | |
6dc9b74b | 686 | log_init(1); |
1a016bfd | 687 | |
9d0d18b5 | 688 | #ifdef HAVE_PUTENV |
c95ca2a2 | 689 | if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) { |
9d0d18b5 | 690 | int status; |
2fe1feea | 691 | |
c95ca2a2 WD |
692 | /* For post-xfer exec, fork a new process to run the rsync |
693 | * daemon while this process waits for the exit status and | |
694 | * runs the indicated command at that point. */ | |
695 | if (*lp_postxfer_exec(i)) { | |
9d0d18b5 WD |
696 | pid_t pid = fork(); |
697 | if (pid < 0) { | |
698 | rsyserr(FLOG, errno, "fork failed"); | |
699 | io_printf(f_out, "@ERROR: fork failed\n"); | |
700 | return -1; | |
701 | } | |
702 | if (pid) { | |
ce571e64 WD |
703 | close(f_in); |
704 | if (f_out != f_in) | |
705 | close(f_out); | |
0a9fbe17 | 706 | set_env_num("RSYNC_PID", (long)pid); |
c95ca2a2 WD |
707 | if (wait_process(pid, &status, 0) < 0) |
708 | status = -1; | |
0a9fbe17 | 709 | set_env_num("RSYNC_RAW_STATUS", status); |
9d0d18b5 WD |
710 | if (WIFEXITED(status)) |
711 | status = WEXITSTATUS(status); | |
712 | else | |
713 | status = -1; | |
0a9fbe17 | 714 | set_env_num("RSYNC_EXIT_STATUS", status); |
94112924 WD |
715 | if (system(lp_postxfer_exec(i)) < 0) |
716 | status = -1; | |
9d0d18b5 WD |
717 | _exit(status); |
718 | } | |
719 | } | |
c95ca2a2 WD |
720 | /* For pre-xfer exec, fork a child process to run the indicated |
721 | * command, though it first waits for the parent process to | |
722 | * send us the user's request via a pipe. */ | |
723 | if (*lp_prexfer_exec(i)) { | |
820f7a7b | 724 | int arg_fds[2], error_fds[2]; |
0a9fbe17 | 725 | set_env_num("RSYNC_PID", (long)getpid()); |
820f7a7b | 726 | if (pipe(arg_fds) < 0 || pipe(error_fds) < 0 || (pre_exec_pid = fork()) < 0) { |
c95ca2a2 WD |
727 | rsyserr(FLOG, errno, "pre-xfer exec preparation failed"); |
728 | io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n"); | |
729 | return -1; | |
730 | } | |
731 | if (pre_exec_pid == 0) { | |
141c6265 WD |
732 | char buf[BIGPATHBUFLEN]; |
733 | int j, len; | |
820f7a7b WD |
734 | close(arg_fds[1]); |
735 | close(error_fds[0]); | |
736 | pre_exec_arg_fd = arg_fds[0]; | |
737 | pre_exec_error_fd = error_fds[1]; | |
738 | set_blocking(pre_exec_arg_fd); | |
739 | set_blocking(pre_exec_error_fd); | |
740 | len = read_arg_from_pipe(pre_exec_arg_fd, buf, BIGPATHBUFLEN); | |
c95ca2a2 WD |
741 | if (len <= 0) |
742 | _exit(1); | |
0a9fbe17 | 743 | set_env_str("RSYNC_REQUEST", buf); |
141c6265 | 744 | for (j = 0; ; j++) { |
820f7a7b | 745 | len = read_arg_from_pipe(pre_exec_arg_fd, buf, |
141c6265 WD |
746 | BIGPATHBUFLEN); |
747 | if (len <= 0) { | |
748 | if (!len) | |
749 | break; | |
750 | _exit(1); | |
751 | } | |
89e049ad | 752 | if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) >= 0) |
503114a7 | 753 | putenv(p); |
141c6265 | 754 | } |
820f7a7b | 755 | close(pre_exec_arg_fd); |
c95ca2a2 | 756 | close(STDIN_FILENO); |
820f7a7b WD |
757 | dup2(pre_exec_error_fd, STDOUT_FILENO); |
758 | close(pre_exec_error_fd); | |
c95ca2a2 WD |
759 | status = system(lp_prexfer_exec(i)); |
760 | if (!WIFEXITED(status)) | |
761 | _exit(1); | |
762 | _exit(WEXITSTATUS(status)); | |
763 | } | |
820f7a7b WD |
764 | close(arg_fds[0]); |
765 | close(error_fds[1]); | |
766 | pre_exec_arg_fd = arg_fds[1]; | |
767 | pre_exec_error_fd = error_fds[0]; | |
768 | set_blocking(pre_exec_arg_fd); | |
769 | set_blocking(pre_exec_error_fd); | |
c95ca2a2 | 770 | } |
9d0d18b5 WD |
771 | } |
772 | #endif | |
773 | ||
8638dd48 | 774 | if (use_chroot) { |
b52c1d9d MP |
775 | /* |
776 | * XXX: The 'use chroot' flag is a fairly reliable | |
777 | * source of confusion, because it fails under two | |
778 | * important circumstances: running as non-root, | |
779 | * running on Win32 (or possibly others). On the | |
780 | * other hand, if you are running as root, then it | |
781 | * might be better to always use chroot. | |
782 | * | |
783 | * So, perhaps if we can't chroot we should just issue | |
784 | * a warning, unless a "require chroot" flag is set, | |
785 | * in which case we fail. | |
786 | */ | |
433c6753 WD |
787 | if (chroot(module_chdir)) { |
788 | rsyserr(FLOG, errno, "chroot %s failed", module_chdir); | |
68f40ebb | 789 | io_printf(f_out, "@ERROR: chroot failed\n"); |
8638dd48 DD |
790 | return -1; |
791 | } | |
433c6753 | 792 | module_chdir = module_dir; |
716baed7 DD |
793 | } |
794 | ||
26e21efc WD |
795 | if (!change_dir(module_chdir, CD_NORMAL)) |
796 | return path_failure(f_out, module_chdir, True); | |
881addc9 | 797 | if (module_dirlen || (!use_chroot && !*lp_daemon_chroot())) |
433c6753 WD |
798 | sanitize_paths = 1; |
799 | ||
9585b276 | 800 | if ((munge_symlinks = lp_munge_symlinks(i)) < 0) |
2fe1feea | 801 | munge_symlinks = !use_chroot || module_dirlen; |
9585b276 WD |
802 | if (munge_symlinks) { |
803 | STRUCT_STAT st; | |
41adbcec WD |
804 | char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */ |
805 | strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */ | |
806 | if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) { | |
807 | rprintf(FLOG, "Symlink munging is unsafe when a %s directory exists.\n", | |
808 | prefix); | |
9585b276 WD |
809 | io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name); |
810 | exit_cleanup(RERR_UNSUPPORTED); | |
811 | } | |
812 | } | |
813 | ||
2a7355fb WD |
814 | if (gid_list.count) { |
815 | gid_t *gid_array = gid_list.items; | |
816 | if (setgid(gid_array[0])) { | |
817 | rsyserr(FLOG, errno, "setgid %ld failed", (long)gid_array[0]); | |
68f40ebb | 818 | io_printf(f_out, "@ERROR: setgid failed\n"); |
8638dd48 DD |
819 | return -1; |
820 | } | |
4f5b0756 | 821 | #ifdef HAVE_SETGROUPS |
7f367bb1 | 822 | /* Set the group(s) we want to be active. */ |
2a7355fb | 823 | if (setgroups(gid_list.count, gid_array)) { |
1732b6c0 | 824 | rsyserr(FLOG, errno, "setgroups failed"); |
6969ebcf WD |
825 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
826 | return -1; | |
827 | } | |
828 | #endif | |
7f367bb1 WD |
829 | #if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST |
830 | /* pw is set if the user wants all the user's groups. */ | |
831 | if (pw && initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
832 | rsyserr(FLOG, errno, "initgroups failed"); | |
833 | io_printf(f_out, "@ERROR: initgroups failed\n"); | |
834 | return -1; | |
835 | } | |
836 | #endif | |
837 | } | |
3591c066 | 838 | |
7f367bb1 | 839 | if (set_uid) { |
cece2e3f WD |
840 | if (setuid(uid) < 0 |
841 | #ifdef HAVE_SETEUID | |
842 | || seteuid(uid) < 0 | |
843 | #endif | |
844 | ) { | |
7f367bb1 | 845 | rsyserr(FLOG, errno, "setuid %ld failed", (long)uid); |
68f40ebb | 846 | io_printf(f_out, "@ERROR: setuid failed\n"); |
8638dd48 DD |
847 | return -1; |
848 | } | |
849 | ||
6fe05820 | 850 | am_root = (MY_UID() == 0); |
3591c066 AT |
851 | } |
852 | ||
fed1f3f4 WD |
853 | if (lp_temp_dir(i) && *lp_temp_dir(i)) { |
854 | tmpdir = lp_temp_dir(i); | |
855 | if (strlen(tmpdir) >= MAXPATHLEN - 10) { | |
856 | rprintf(FLOG, | |
857 | "the 'temp dir' value for %s is WAY too long -- ignoring.\n", | |
858 | name); | |
859 | tmpdir = NULL; | |
860 | } | |
861 | } | |
862 | ||
68f40ebb | 863 | io_printf(f_out, "@RSYNCD: OK\n"); |
3591c066 | 864 | |
53936ef9 WD |
865 | read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request); |
866 | orig_argv = argv; | |
867 | ||
41adbcec WD |
868 | save_munge_symlinks = munge_symlinks; |
869 | ||
951e826b | 870 | reset_output_levels(); /* future verbosity is controlled by client options */ |
53936ef9 WD |
871 | ret = parse_arguments(&argc, (const char ***) &argv); |
872 | if (protect_args && ret) { | |
873 | orig_early_argv = orig_argv; | |
874 | protect_args = 2; | |
875 | read_args(f_in, name, line, sizeof line, 1, &argv, &argc, &request); | |
876 | orig_argv = argv; | |
877 | ret = parse_arguments(&argc, (const char ***) &argv); | |
878 | } else | |
879 | orig_early_argv = NULL; | |
3591c066 | 880 | |
41adbcec WD |
881 | munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */ |
882 | ||
141c6265 | 883 | if (pre_exec_pid) { |
820f7a7b WD |
884 | err_msg = finish_pre_exec(pre_exec_pid, pre_exec_arg_fd, pre_exec_error_fd, |
885 | request, orig_early_argv, orig_argv); | |
141c6265 | 886 | } |
c95ca2a2 | 887 | |
53936ef9 WD |
888 | if (orig_early_argv) |
889 | free(orig_early_argv); | |
890 | ||
875a13b4 | 891 | am_server = 1; /* Don't let someone try to be tricky. */ |
53936ef9 | 892 | quiet = 0; |
3162ea6f WD |
893 | if (lp_ignore_errors(module_id)) |
894 | ignore_errors = 1; | |
5223b786 WD |
895 | if (write_batch < 0) |
896 | dry_run = 1; | |
3591c066 | 897 | |
cbbd8e2e WD |
898 | if (lp_fake_super(i)) { |
899 | if (preserve_xattrs > 1) | |
900 | preserve_xattrs = 1; | |
9439c0cb | 901 | am_root = -1; |
cbbd8e2e | 902 | } else if (am_root < 0) /* Treat --fake-super from client as --super. */ |
9439c0cb WD |
903 | am_root = 2; |
904 | ||
7c2a9e76 WD |
905 | if (filesfrom_fd == 0) |
906 | filesfrom_fd = f_in; | |
907 | ||
7b372642 | 908 | if (request) { |
97cb8dc2 | 909 | if (*auth_user) { |
9e5a5ddb WD |
910 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
911 | am_sender ? "on" : "to", | |
97cb8dc2 | 912 | request, auth_user, host, addr); |
d0d56395 | 913 | } else { |
9e5a5ddb WD |
914 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
915 | am_sender ? "on" : "to", | |
d0d56395 AT |
916 | request, host, addr); |
917 | } | |
7b372642 AT |
918 | free(request); |
919 | } | |
920 | ||
15b7b73d | 921 | #ifndef DEBUG |
3591c066 | 922 | /* don't allow the logs to be flooded too fast */ |
951e826b | 923 | limit_output_verbosity(lp_max_verbosity(i)); |
0199b05f | 924 | #endif |
3591c066 | 925 | |
1732b6c0 WD |
926 | if (protocol_version < 23 |
927 | && (protocol_version == 22 || am_sender)) | |
d8587b46 | 928 | io_start_multiplex_out(f_out); |
c95ca2a2 | 929 | else if (!ret || err_msg) { |
1732b6c0 WD |
930 | /* We have to get I/O multiplexing started so that we can |
931 | * get the error back to the client. This means getting | |
932 | * the protocol setup finished first in later versions. */ | |
933 | setup_protocol(f_out, f_in); | |
b03c719f WD |
934 | if (!am_sender) { |
935 | /* Since we failed in our option parsing, we may not | |
936 | * have finished parsing that the client sent us a | |
937 | * --files-from option, so look for it manually. | |
938 | * Without this, the socket would be in the wrong | |
939 | * state for the upcoming error message. */ | |
940 | if (!files_from) { | |
941 | int i; | |
942 | for (i = 0; i < argc; i++) { | |
943 | if (strncmp(argv[i], "--files-from", 12) == 0) { | |
944 | files_from = ""; | |
945 | break; | |
946 | } | |
947 | } | |
948 | } | |
949 | if (files_from) | |
950 | write_byte(f_out, 0); | |
951 | } | |
d8587b46 | 952 | io_start_multiplex_out(f_out); |
554e0a8d | 953 | } |
15b7b73d | 954 | |
c95ca2a2 | 955 | if (!ret || err_msg) { |
820f7a7b WD |
956 | if (err_msg) { |
957 | while ((p = strchr(err_msg, '\n')) != NULL) { | |
958 | int len = p - err_msg + 1; | |
959 | rwrite(FERROR, err_msg, len, 0); | |
960 | err_msg += len; | |
961 | } | |
962 | if (*err_msg) | |
963 | rprintf(FERROR, "%s\n", err_msg); | |
964 | } else | |
c95ca2a2 | 965 | option_error(); |
7e561438 | 966 | msleep(400); |
4a7144ee | 967 | exit_cleanup(RERR_UNSUPPORTED); |
41979ff8 AT |
968 | } |
969 | ||
15dbffc2 | 970 | #ifdef ICONV_OPTION |
0b52f94d WD |
971 | if (!iconv_opt) { |
972 | if (ic_send != (iconv_t)-1) { | |
973 | iconv_close(ic_send); | |
974 | ic_send = (iconv_t)-1; | |
975 | } | |
976 | if (ic_recv != (iconv_t)-1) { | |
977 | iconv_close(ic_recv); | |
978 | ic_recv = (iconv_t)-1; | |
979 | } | |
980 | } | |
15dbffc2 | 981 | #endif |
0b52f94d WD |
982 | |
983 | if (!numeric_ids | |
984 | && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True)) | |
985 | numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */ | |
986 | ||
8b3e6fb9 | 987 | if (lp_timeout(i) && (!io_timeout || lp_timeout(i) < io_timeout)) |
3e6ddb37 | 988 | set_io_timeout(lp_timeout(i)); |
81791cfc | 989 | |
f041b025 WD |
990 | /* If we have some incoming/outgoing chmod changes, append them to |
991 | * any user-specified changes (making our changes have priority). | |
992 | * We also get a pointer to just our changes so that a receiver | |
993 | * process can use them separately if --perms wasn't specified. */ | |
aaccaa88 WD |
994 | if (am_sender) |
995 | p = lp_outgoing_chmod(i); | |
996 | else | |
997 | p = lp_incoming_chmod(i); | |
8840ec0f | 998 | if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) { |
aaccaa88 WD |
999 | rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n", |
1000 | am_sender ? "outgo" : "incom", p); | |
1001 | } | |
730df9d2 | 1002 | |
c9dc1300 | 1003 | start_server(f_in, f_out, argc, argv); |
3591c066 AT |
1004 | |
1005 | return 0; | |
1006 | } | |
1007 | ||
7a6421fa AT |
1008 | /* send a list of available modules to the client. Don't list those |
1009 | with "list = False". */ | |
3591c066 AT |
1010 | static void send_listing(int fd) |
1011 | { | |
b583594a | 1012 | int n = lp_num_modules(); |
3591c066 | 1013 | int i; |
063393d6 | 1014 | |
c0422cea | 1015 | for (i = 0; i < n; i++) { |
3591c066 | 1016 | if (lp_list(i)) |
4a7144ee | 1017 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
c0422cea | 1018 | } |
8f04bb36 | 1019 | |
daa598df | 1020 | if (protocol_version >= 25) |
063393d6 | 1021 | io_printf(fd,"@RSYNCD: EXIT\n"); |
3591c066 AT |
1022 | } |
1023 | ||
d1c06c21 WD |
1024 | static int load_config(int globals_only) |
1025 | { | |
1026 | if (!config_file) { | |
1027 | if (am_server && am_root <= 0) | |
1028 | config_file = RSYNCD_USERCONF; | |
1029 | else | |
1030 | config_file = RSYNCD_SYSCONF; | |
1031 | } | |
1032 | return lp_load(config_file, globals_only); | |
1033 | } | |
1034 | ||
68f40ebb | 1035 | /* this is called when a connection is established to a client |
3591c066 AT |
1036 | and we want to start talking. The setup of the system is done from |
1037 | here */ | |
68f40ebb | 1038 | int start_daemon(int f_in, int f_out) |
3591c066 | 1039 | { |
20accf4d | 1040 | char line[1024]; |
df694f72 | 1041 | const char *addr, *host; |
881addc9 | 1042 | char *p; |
c0422cea | 1043 | int i; |
4cdf25e4 | 1044 | |
da3478b2 WD |
1045 | io_set_sock_fds(f_in, f_out); |
1046 | ||
374c3e12 WD |
1047 | /* We must load the config file before calling any function that |
1048 | * might cause log-file output to occur. This ensures that the | |
1049 | * "log file" param gets honored for the 2 non-forked use-cases | |
08e0a629 | 1050 | * (when rsync is run by init and run by a remote shell). */ |
d1c06c21 | 1051 | if (!load_config(0)) |
65417579 | 1052 | exit_cleanup(RERR_SYNTAX); |
3591c066 | 1053 | |
881addc9 WD |
1054 | p = lp_daemon_chroot(); |
1055 | if (*p) { | |
1056 | log_init(0); /* Make use we've initialized syslog before chrooting. */ | |
1057 | if (chroot(p) < 0 || chdir("/") < 0) { | |
1058 | rsyserr(FLOG, errno, "daemon chroot %s failed", p); | |
1059 | return -1; | |
1060 | } | |
1061 | } | |
1062 | p = lp_daemon_gid(); | |
1063 | if (*p) { | |
1064 | gid_t gid; | |
1065 | if (!group_to_gid(p, &gid, True)) { | |
1066 | rprintf(FLOG, "Invalid daemon gid: %s\n", p); | |
1067 | return -1; | |
1068 | } | |
1069 | if (setgid(gid) < 0) { | |
1070 | rsyserr(FLOG, errno, "Unable to set group to daemon gid %ld", (long)gid); | |
1071 | return -1; | |
1072 | } | |
1073 | } | |
1074 | p = lp_daemon_uid(); | |
1075 | if (*p) { | |
1076 | uid_t uid; | |
1077 | if (!user_to_uid(p, &uid, True)) { | |
1078 | rprintf(FLOG, "Invalid daemon uid: %s\n", p); | |
1079 | return -1; | |
1080 | } | |
1081 | if (setuid(uid) < 0) { | |
1082 | rsyserr(FLOG, errno, "Unable to set user to daemon uid %ld", (long)uid); | |
1083 | return -1; | |
1084 | } | |
1085 | } | |
1086 | ||
374c3e12 | 1087 | addr = client_addr(f_in); |
11ef77b7 | 1088 | host = lp_reverse_lookup(-1) ? client_name(f_in) : undetermined_hostname; |
374c3e12 | 1089 | rprintf(FLOG, "connect from %s (%s)\n", host, addr); |
91d324b4 | 1090 | |
68f40ebb WD |
1091 | if (!am_server) { |
1092 | set_socket_options(f_in, "SO_KEEPALIVE"); | |
68f40ebb WD |
1093 | set_nonblocking(f_in); |
1094 | } | |
3591c066 | 1095 | |
7909e65f | 1096 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
91eee594 | 1097 | return -1; |
91eee594 | 1098 | |
c0422cea | 1099 | line[0] = 0; |
5ebe9a46 | 1100 | if (!read_line_old(f_in, line, sizeof line, 0)) |
c0422cea | 1101 | return -1; |
3591c066 | 1102 | |
c0422cea | 1103 | if (!*line || strcmp(line, "#list") == 0) { |
b3e15181 WD |
1104 | rprintf(FLOG, "module-list request from %s (%s)\n", |
1105 | host, addr); | |
c0422cea WD |
1106 | send_listing(f_out); |
1107 | return -1; | |
1108 | } | |
3591c066 | 1109 | |
c0422cea WD |
1110 | if (*line == '#') { |
1111 | /* it's some sort of command that I don't understand */ | |
1112 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
1113 | return -1; | |
1114 | } | |
3591c066 | 1115 | |
c0422cea | 1116 | if ((i = lp_number(line)) < 0) { |
c0422cea WD |
1117 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
1118 | line, host, addr); | |
1119 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); | |
1120 | return -1; | |
3591c066 AT |
1121 | } |
1122 | ||
d749eb68 WD |
1123 | #ifdef HAVE_SIGACTION |
1124 | sigact.sa_flags = SA_NOCLDSTOP; | |
1125 | #endif | |
1126 | SIGACTION(SIGCHLD, remember_children); | |
1127 | ||
439a198d | 1128 | return rsync_module(f_in, f_out, i, addr, host); |
3591c066 AT |
1129 | } |
1130 | ||
dd589118 | 1131 | static void create_pid_file(void) |
a1d2685b WD |
1132 | { |
1133 | char *pid_file = lp_pid_file(); | |
1134 | char pidbuf[16]; | |
dd589118 | 1135 | pid_t pid = getpid(); |
94112924 | 1136 | int fd, len; |
a1d2685b WD |
1137 | |
1138 | if (!pid_file || !*pid_file) | |
1139 | return; | |
1140 | ||
1141 | cleanup_set_pid(pid); | |
9a54a640 | 1142 | if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) { |
94112924 | 1143 | failure: |
a1d2685b | 1144 | cleanup_set_pid(0); |
dd589118 | 1145 | fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno)); |
a1d2685b WD |
1146 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
1147 | exit_cleanup(RERR_FILEIO); | |
1148 | } | |
35276770 | 1149 | snprintf(pidbuf, sizeof pidbuf, "%d\n", (int)pid); |
94112924 WD |
1150 | len = strlen(pidbuf); |
1151 | if (write(fd, pidbuf, len) != len) | |
1152 | goto failure; | |
a1d2685b WD |
1153 | close(fd); |
1154 | } | |
1155 | ||
1156 | /* Become a daemon, discarding the controlling terminal. */ | |
1157 | static void become_daemon(void) | |
3591c066 | 1158 | { |
a1d2685b WD |
1159 | int i; |
1160 | pid_t pid = fork(); | |
1161 | ||
1162 | if (pid) { | |
dd589118 WD |
1163 | if (pid < 0) { |
1164 | fprintf(stderr, "failed to fork: %s\n", strerror(errno)); | |
1165 | exit_cleanup(RERR_FILEIO); | |
1166 | } | |
a1d2685b WD |
1167 | _exit(0); |
1168 | } | |
1a016bfd | 1169 | |
dd589118 WD |
1170 | create_pid_file(); |
1171 | ||
a1d2685b WD |
1172 | /* detach from the terminal */ |
1173 | #ifdef HAVE_SETSID | |
1174 | setsid(); | |
1175 | #elif defined TIOCNOTTY | |
1176 | i = open("/dev/tty", O_RDWR); | |
1177 | if (i >= 0) { | |
1178 | ioctl(i, (int)TIOCNOTTY, (char *)0); | |
1179 | close(i); | |
1180 | } | |
1181 | #endif | |
1182 | /* make sure that stdin, stdout an stderr don't stuff things | |
1183 | * up (library functions, for example) */ | |
1184 | for (i = 0; i < 3; i++) { | |
1185 | close(i); | |
1186 | open("/dev/null", O_RDWR); | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | int daemon_main(void) | |
1191 | { | |
3591c066 | 1192 | if (is_a_socket(STDIN_FILENO)) { |
41979ff8 AT |
1193 | int i; |
1194 | ||
1195 | /* we are running via inetd - close off stdout and | |
4a7144ee WD |
1196 | * stderr so that library functions (and getopt) don't |
1197 | * try to use them. Redirect them to /dev/null */ | |
2e94e70e | 1198 | for (i = 1; i < 3; i++) { |
4a7144ee | 1199 | close(i); |
41979ff8 AT |
1200 | open("/dev/null", O_RDWR); |
1201 | } | |
3eb38818 | 1202 | |
68f40ebb | 1203 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
3591c066 AT |
1204 | } |
1205 | ||
d1c06c21 | 1206 | if (!load_config(1)) { |
a1d2685b | 1207 | fprintf(stderr, "Failed to parse config file: %s\n", config_file); |
65417579 | 1208 | exit_cleanup(RERR_SYNTAX); |
a1d2685b | 1209 | } |
2206abf8 | 1210 | set_dparams(0); |
a1d2685b WD |
1211 | |
1212 | if (no_detach) | |
dd589118 | 1213 | create_pid_file(); |
a1d2685b WD |
1214 | else |
1215 | become_daemon(); | |
f9e940ef | 1216 | |
0c56b1ad WD |
1217 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
1218 | rsync_port = RSYNC_PORT; | |
3dfe6e97 | 1219 | if (bind_address == NULL && *lp_bind_address()) |
986aaaaa | 1220 | bind_address = lp_bind_address(); |
0c56b1ad | 1221 | |
6dc9b74b | 1222 | log_init(0); |
f9e940ef | 1223 | |
9e5a5ddb | 1224 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
4a7144ee WD |
1225 | RSYNC_VERSION, rsync_port); |
1226 | /* TODO: If listening on a particular address, then show that | |
0a04a80d | 1227 | * address too. In fact, why not just do getnameinfo on the |
4a7144ee | 1228 | * local address??? */ |
e42c9458 | 1229 | |
8ef4ffd6 AT |
1230 | start_accept_loop(rsync_port, start_daemon); |
1231 | return -1; | |
3591c066 | 1232 | } |