| 1 | /* -*- c-file-style: "linux"; -*- |
| 2 | * |
| 3 | * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org> |
| 4 | * Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * |
| 24 | * The socket based protocol for setting up a connection with |
| 25 | * rsyncd. |
| 26 | **/ |
| 27 | |
| 28 | #include "rsync.h" |
| 29 | |
| 30 | extern int am_sender; |
| 31 | extern int am_server; |
| 32 | extern int am_daemon; |
| 33 | extern int am_root; |
| 34 | extern int module_id; |
| 35 | extern int read_only; |
| 36 | extern int verbose; |
| 37 | extern int rsync_port; |
| 38 | extern int kludge_around_eof; |
| 39 | extern int daemon_over_rsh; |
| 40 | extern int list_only; |
| 41 | extern int sanitize_paths; |
| 42 | extern int filesfrom_fd; |
| 43 | extern int remote_protocol; |
| 44 | extern int protocol_version; |
| 45 | extern int io_timeout; |
| 46 | extern int select_timeout; |
| 47 | extern int orig_umask; |
| 48 | extern int no_detach; |
| 49 | extern int default_af_hint; |
| 50 | extern char *bind_address; |
| 51 | extern struct filter_list_struct server_filter_list; |
| 52 | extern char *config_file; |
| 53 | extern char *files_from; |
| 54 | |
| 55 | char *auth_user; |
| 56 | |
| 57 | /* Length of lp_path() string when in daemon mode & not chrooted, else 0. */ |
| 58 | unsigned int module_dirlen = 0; |
| 59 | |
| 60 | /** |
| 61 | * Run a client connected to an rsyncd. The alternative to this |
| 62 | * function for remote-shell connections is do_cmd(). |
| 63 | * |
| 64 | * After negotiating which module to use and reading the server's |
| 65 | * motd, this hands over to client_run(). Telling the server the |
| 66 | * module will cause it to chroot/setuid/etc. |
| 67 | * |
| 68 | * Instead of doing a transfer, the client may at this stage instead |
| 69 | * get a listing of remote modules and exit. |
| 70 | * |
| 71 | * @return -1 for error in startup, or the result of client_run(). |
| 72 | * Either way, it eventually gets passed to exit_cleanup(). |
| 73 | **/ |
| 74 | int start_socket_client(char *host, char *path, int argc, char *argv[]) |
| 75 | { |
| 76 | int fd, ret; |
| 77 | char *p, *user = NULL; |
| 78 | |
| 79 | /* This is redundant with code in start_inband_exchange(), but this |
| 80 | * short-circuits a problem in the client before we open a socket, |
| 81 | * and the extra check won't hurt. */ |
| 82 | if (*path == '/') { |
| 83 | rprintf(FERROR, |
| 84 | "ERROR: The remote path must start with a module name not a /\n"); |
| 85 | return -1; |
| 86 | } |
| 87 | |
| 88 | if ((p = strchr(host, '@')) != NULL) { |
| 89 | user = host; |
| 90 | host = p+1; |
| 91 | *p = '\0'; |
| 92 | } |
| 93 | |
| 94 | if (rsync_port == 0) |
| 95 | rsync_port = RSYNC_PORT; |
| 96 | |
| 97 | fd = open_socket_out_wrapped(host, rsync_port, bind_address, |
| 98 | default_af_hint); |
| 99 | if (fd == -1) |
| 100 | exit_cleanup(RERR_SOCKETIO); |
| 101 | |
| 102 | ret = start_inband_exchange(user, path, fd, fd, argc); |
| 103 | |
| 104 | return ret < 0? ret : client_run(fd, fd, -1, argc, argv); |
| 105 | } |
| 106 | |
| 107 | int start_inband_exchange(char *user, char *path, int f_in, int f_out, |
| 108 | int argc) |
| 109 | { |
| 110 | int i; |
| 111 | char *sargs[MAX_ARGS]; |
| 112 | int sargc = 0; |
| 113 | char line[MAXPATHLEN]; |
| 114 | char *p; |
| 115 | |
| 116 | if (argc == 0 && !am_sender) |
| 117 | list_only |= 1; |
| 118 | |
| 119 | if (*path == '/') { |
| 120 | rprintf(FERROR, |
| 121 | "ERROR: The remote path must start with a module name\n"); |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | if (!user) |
| 126 | user = getenv("USER"); |
| 127 | if (!user) |
| 128 | user = getenv("LOGNAME"); |
| 129 | |
| 130 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
| 131 | |
| 132 | if (!read_line(f_in, line, sizeof line - 1)) { |
| 133 | rprintf(FERROR, "rsync: did not see server greeting\n"); |
| 134 | return -1; |
| 135 | } |
| 136 | |
| 137 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
| 138 | /* note that read_line strips of \n or \r */ |
| 139 | rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", |
| 140 | line); |
| 141 | return -1; |
| 142 | } |
| 143 | if (protocol_version > remote_protocol) |
| 144 | protocol_version = remote_protocol; |
| 145 | |
| 146 | if (list_only && protocol_version >= 29) |
| 147 | list_only |= 2; |
| 148 | |
| 149 | /* set daemon_over_rsh to false since we need to build the |
| 150 | * true set of args passed through the rsh/ssh connection; |
| 151 | * this is a no-op for direct-socket-connection mode */ |
| 152 | daemon_over_rsh = 0; |
| 153 | server_options(sargs, &sargc); |
| 154 | |
| 155 | sargs[sargc++] = "."; |
| 156 | |
| 157 | if (path && *path) |
| 158 | sargs[sargc++] = path; |
| 159 | |
| 160 | sargs[sargc] = NULL; |
| 161 | |
| 162 | if (verbose > 1) |
| 163 | print_child_argv(sargs); |
| 164 | |
| 165 | p = strchr(path,'/'); |
| 166 | if (p) *p = 0; |
| 167 | io_printf(f_out, "%s\n", path); |
| 168 | if (p) *p = '/'; |
| 169 | |
| 170 | /* Old servers may just drop the connection here, |
| 171 | rather than sending a proper EXIT command. Yuck. */ |
| 172 | kludge_around_eof = list_only && (protocol_version < 25); |
| 173 | |
| 174 | while (1) { |
| 175 | if (!read_line(f_in, line, sizeof line - 1)) { |
| 176 | rprintf(FERROR, "rsync: didn't get server startup line\n"); |
| 177 | return -1; |
| 178 | } |
| 179 | |
| 180 | if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) { |
| 181 | auth_client(f_out, user, line+18); |
| 182 | continue; |
| 183 | } |
| 184 | |
| 185 | if (strcmp(line,"@RSYNCD: OK") == 0) |
| 186 | break; |
| 187 | |
| 188 | if (strcmp(line,"@RSYNCD: EXIT") == 0) { |
| 189 | /* This is sent by recent versions of the |
| 190 | * server to terminate the listing of modules. |
| 191 | * We don't want to go on and transfer |
| 192 | * anything; just exit. */ |
| 193 | exit(0); |
| 194 | } |
| 195 | |
| 196 | if (strncmp(line, "@ERROR", 6) == 0) { |
| 197 | rprintf(FERROR, "%s\n", line); |
| 198 | /* This is always fatal; the server will now |
| 199 | * close the socket. */ |
| 200 | return RERR_STARTCLIENT; |
| 201 | } else { |
| 202 | rprintf(FINFO,"%s\n", line); |
| 203 | } |
| 204 | } |
| 205 | kludge_around_eof = False; |
| 206 | |
| 207 | for (i = 0; i < sargc; i++) { |
| 208 | io_printf(f_out, "%s\n", sargs[i]); |
| 209 | } |
| 210 | io_printf(f_out, "\n"); |
| 211 | |
| 212 | if (protocol_version < 23) { |
| 213 | if (protocol_version == 22 || !am_sender) |
| 214 | io_start_multiplex_in(); |
| 215 | } |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | |
| 222 | static int rsync_module(int f_in, int f_out, int i) |
| 223 | { |
| 224 | int argc = 0; |
| 225 | int maxargs; |
| 226 | char **argv; |
| 227 | char **argp; |
| 228 | char line[MAXPATHLEN]; |
| 229 | uid_t uid = (uid_t)-2; /* canonically "nobody" */ |
| 230 | gid_t gid = (gid_t)-2; |
| 231 | char *p; |
| 232 | char *addr = client_addr(f_in); |
| 233 | char *host = client_name(f_in); |
| 234 | char *name = lp_name(i); |
| 235 | int use_chroot = lp_use_chroot(i); |
| 236 | int start_glob = 0; |
| 237 | int ret; |
| 238 | char *request = NULL; |
| 239 | |
| 240 | if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) { |
| 241 | rprintf(FLOG, "rsync denied on module %s from %s (%s)\n", |
| 242 | name, host, addr); |
| 243 | if (!lp_list(i)) |
| 244 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", name); |
| 245 | else { |
| 246 | io_printf(f_out, |
| 247 | "@ERROR: access denied to %s from %s (%s)\n", |
| 248 | name, host, addr); |
| 249 | } |
| 250 | return -1; |
| 251 | } |
| 252 | |
| 253 | if (am_daemon && am_server) { |
| 254 | rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n", |
| 255 | name, host, addr); |
| 256 | } |
| 257 | |
| 258 | if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) { |
| 259 | if (errno) { |
| 260 | rsyserr(FLOG, errno, "failed to open lock file %s", |
| 261 | lp_lock_file(i)); |
| 262 | io_printf(f_out, "@ERROR: failed to open lock file %s\n", |
| 263 | lp_lock_file(i)); |
| 264 | } else { |
| 265 | rprintf(FLOG, "max connections (%d) reached\n", |
| 266 | lp_max_connections(i)); |
| 267 | io_printf(f_out, "@ERROR: max connections (%d) reached - try again later\n", |
| 268 | lp_max_connections(i)); |
| 269 | } |
| 270 | return -1; |
| 271 | } |
| 272 | |
| 273 | auth_user = auth_server(f_in, f_out, i, addr, "@RSYNCD: AUTHREQD "); |
| 274 | |
| 275 | if (!auth_user) { |
| 276 | rprintf(FLOG, "auth failed on module %s from %s (%s)\n", |
| 277 | name, host, addr); |
| 278 | io_printf(f_out, "@ERROR: auth failed on module %s\n", name); |
| 279 | return -1; |
| 280 | } |
| 281 | |
| 282 | module_id = i; |
| 283 | |
| 284 | am_root = (MY_UID() == 0); |
| 285 | |
| 286 | if (am_root) { |
| 287 | p = lp_uid(i); |
| 288 | if (!name_to_uid(p, &uid)) { |
| 289 | if (!isdigit(*(unsigned char *)p)) { |
| 290 | rprintf(FLOG, "Invalid uid %s\n", p); |
| 291 | io_printf(f_out, "@ERROR: invalid uid %s\n", p); |
| 292 | return -1; |
| 293 | } |
| 294 | uid = atoi(p); |
| 295 | } |
| 296 | |
| 297 | p = lp_gid(i); |
| 298 | if (!name_to_gid(p, &gid)) { |
| 299 | if (!isdigit(*(unsigned char *)p)) { |
| 300 | rprintf(FLOG, "Invalid gid %s\n", p); |
| 301 | io_printf(f_out, "@ERROR: invalid gid %s\n", p); |
| 302 | return -1; |
| 303 | } |
| 304 | gid = atoi(p); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* TODO: If we're not root, but the configuration requests |
| 309 | * that we change to some uid other than the current one, then |
| 310 | * log a warning. */ |
| 311 | |
| 312 | /* TODO: Perhaps take a list of gids, and make them into the |
| 313 | * supplementary groups. */ |
| 314 | |
| 315 | if (use_chroot) { |
| 316 | module_dirlen = 0; |
| 317 | set_filter_dir("/", 1); |
| 318 | } else { |
| 319 | module_dirlen = strlen(lp_path(i)); |
| 320 | set_filter_dir(lp_path(i), module_dirlen); |
| 321 | } |
| 322 | |
| 323 | p = lp_filter(i); |
| 324 | add_filter(&server_filter_list, p, |
| 325 | XFLG_WORD_SPLIT | XFLG_ABS_PATH); |
| 326 | |
| 327 | p = lp_include_from(i); |
| 328 | add_filter_file(&server_filter_list, p, |
| 329 | XFLG_FATAL_ERRORS | XFLG_ABS_PATH | XFLG_DEF_INCLUDE); |
| 330 | |
| 331 | p = lp_include(i); |
| 332 | add_filter(&server_filter_list, p, |
| 333 | XFLG_WORD_SPLIT | XFLG_ABS_PATH | XFLG_DEF_INCLUDE); |
| 334 | |
| 335 | p = lp_exclude_from(i); |
| 336 | add_filter_file(&server_filter_list, p, |
| 337 | XFLG_FATAL_ERRORS | XFLG_ABS_PATH | XFLG_DEF_EXCLUDE); |
| 338 | |
| 339 | p = lp_exclude(i); |
| 340 | add_filter(&server_filter_list, p, |
| 341 | XFLG_WORD_SPLIT | XFLG_ABS_PATH | XFLG_DEF_EXCLUDE); |
| 342 | |
| 343 | log_init(); |
| 344 | |
| 345 | if (use_chroot) { |
| 346 | /* |
| 347 | * XXX: The 'use chroot' flag is a fairly reliable |
| 348 | * source of confusion, because it fails under two |
| 349 | * important circumstances: running as non-root, |
| 350 | * running on Win32 (or possibly others). On the |
| 351 | * other hand, if you are running as root, then it |
| 352 | * might be better to always use chroot. |
| 353 | * |
| 354 | * So, perhaps if we can't chroot we should just issue |
| 355 | * a warning, unless a "require chroot" flag is set, |
| 356 | * in which case we fail. |
| 357 | */ |
| 358 | if (chroot(lp_path(i))) { |
| 359 | rsyserr(FLOG, errno, "chroot %s failed", lp_path(i)); |
| 360 | io_printf(f_out, "@ERROR: chroot failed\n"); |
| 361 | return -1; |
| 362 | } |
| 363 | |
| 364 | if (!push_dir("/")) { |
| 365 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
| 366 | io_printf(f_out, "@ERROR: chdir failed\n"); |
| 367 | return -1; |
| 368 | } |
| 369 | |
| 370 | } else { |
| 371 | if (!push_dir(lp_path(i))) { |
| 372 | rsyserr(FLOG, errno, "chdir %s failed\n", lp_path(i)); |
| 373 | io_printf(f_out, "@ERROR: chdir failed\n"); |
| 374 | return -1; |
| 375 | } |
| 376 | sanitize_paths = 1; |
| 377 | } |
| 378 | |
| 379 | if (am_root) { |
| 380 | /* XXXX: You could argue that if the daemon is started |
| 381 | * by a non-root user and they explicitly specify a |
| 382 | * gid, then we should try to change to that gid -- |
| 383 | * this could be possible if it's already in their |
| 384 | * supplementary groups. */ |
| 385 | |
| 386 | /* TODO: Perhaps we need to document that if rsyncd is |
| 387 | * started by somebody other than root it will inherit |
| 388 | * all their supplementary groups. */ |
| 389 | |
| 390 | if (setgid(gid)) { |
| 391 | rsyserr(FLOG, errno, "setgid %d failed", (int)gid); |
| 392 | io_printf(f_out, "@ERROR: setgid failed\n"); |
| 393 | return -1; |
| 394 | } |
| 395 | #ifdef HAVE_SETGROUPS |
| 396 | /* Get rid of any supplementary groups this process |
| 397 | * might have inheristed. */ |
| 398 | if (setgroups(1, &gid)) { |
| 399 | rsyserr(FLOG, errno, "setgroups failed"); |
| 400 | io_printf(f_out, "@ERROR: setgroups failed\n"); |
| 401 | return -1; |
| 402 | } |
| 403 | #endif |
| 404 | |
| 405 | if (setuid(uid)) { |
| 406 | rsyserr(FLOG, errno, "setuid %d failed", (int)uid); |
| 407 | io_printf(f_out, "@ERROR: setuid failed\n"); |
| 408 | return -1; |
| 409 | } |
| 410 | |
| 411 | am_root = (MY_UID() == 0); |
| 412 | } |
| 413 | |
| 414 | io_printf(f_out, "@RSYNCD: OK\n"); |
| 415 | |
| 416 | maxargs = MAX_ARGS; |
| 417 | if (!(argv = new_array(char *, maxargs))) |
| 418 | out_of_memory("rsync_module"); |
| 419 | argv[argc++] = "rsyncd"; |
| 420 | |
| 421 | while (1) { |
| 422 | if (!read_line(f_in, line, sizeof line - 1)) |
| 423 | return -1; |
| 424 | |
| 425 | if (!*line) |
| 426 | break; |
| 427 | |
| 428 | p = line; |
| 429 | |
| 430 | if (argc == maxargs) { |
| 431 | maxargs += MAX_ARGS; |
| 432 | if (!(argv = realloc_array(argv, char *, maxargs))) |
| 433 | out_of_memory("rsync_module"); |
| 434 | } |
| 435 | if (!(argv[argc] = strdup(p))) |
| 436 | out_of_memory("rsync_module"); |
| 437 | |
| 438 | if (start_glob) { |
| 439 | if (start_glob == 1) { |
| 440 | request = strdup(p); |
| 441 | start_glob++; |
| 442 | } |
| 443 | glob_expand(name, &argv, &argc, &maxargs); |
| 444 | } else |
| 445 | argc++; |
| 446 | |
| 447 | if (strcmp(line, ".") == 0) |
| 448 | start_glob = 1; |
| 449 | } |
| 450 | |
| 451 | argp = argv; |
| 452 | ret = parse_arguments(&argc, (const char ***) &argp, 0); |
| 453 | |
| 454 | if (filesfrom_fd == 0) |
| 455 | filesfrom_fd = f_in; |
| 456 | |
| 457 | if (request) { |
| 458 | if (*auth_user) { |
| 459 | rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n", |
| 460 | am_sender ? "on" : "to", |
| 461 | request, auth_user, host, addr); |
| 462 | } else { |
| 463 | rprintf(FLOG, "rsync %s %s from %s (%s)\n", |
| 464 | am_sender ? "on" : "to", |
| 465 | request, host, addr); |
| 466 | } |
| 467 | free(request); |
| 468 | } |
| 469 | |
| 470 | #ifndef DEBUG |
| 471 | /* don't allow the logs to be flooded too fast */ |
| 472 | if (verbose > lp_max_verbosity()) |
| 473 | verbose = lp_max_verbosity(); |
| 474 | #endif |
| 475 | |
| 476 | if (protocol_version < 23 |
| 477 | && (protocol_version == 22 || am_sender)) |
| 478 | io_start_multiplex_out(); |
| 479 | else if (!ret) { |
| 480 | /* We have to get I/O multiplexing started so that we can |
| 481 | * get the error back to the client. This means getting |
| 482 | * the protocol setup finished first in later versions. */ |
| 483 | setup_protocol(f_out, f_in); |
| 484 | if (files_from && !am_sender && strcmp(files_from, "-") != 0) |
| 485 | write_byte(f_out, 0); |
| 486 | io_start_multiplex_out(); |
| 487 | } |
| 488 | |
| 489 | if (!ret) { |
| 490 | option_error(); |
| 491 | msleep(400); |
| 492 | exit_cleanup(RERR_UNSUPPORTED); |
| 493 | } |
| 494 | |
| 495 | if (lp_timeout(i)) { |
| 496 | io_timeout = lp_timeout(i); |
| 497 | if (io_timeout < select_timeout) |
| 498 | select_timeout = io_timeout; |
| 499 | } |
| 500 | |
| 501 | start_server(f_in, f_out, argc, argp); |
| 502 | |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | /* send a list of available modules to the client. Don't list those |
| 507 | with "list = False". */ |
| 508 | static void send_listing(int fd) |
| 509 | { |
| 510 | int n = lp_numservices(); |
| 511 | int i; |
| 512 | |
| 513 | for (i = 0; i < n; i++) { |
| 514 | if (lp_list(i)) |
| 515 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); |
| 516 | } |
| 517 | |
| 518 | if (protocol_version >= 25) |
| 519 | io_printf(fd,"@RSYNCD: EXIT\n"); |
| 520 | } |
| 521 | |
| 522 | /* this is called when a connection is established to a client |
| 523 | and we want to start talking. The setup of the system is done from |
| 524 | here */ |
| 525 | int start_daemon(int f_in, int f_out) |
| 526 | { |
| 527 | char line[200]; |
| 528 | char *motd; |
| 529 | int i; |
| 530 | |
| 531 | io_set_sock_fds(f_in, f_out); |
| 532 | |
| 533 | if (!lp_load(config_file, 0)) |
| 534 | exit_cleanup(RERR_SYNTAX); |
| 535 | |
| 536 | log_init(); |
| 537 | |
| 538 | if (!am_server) { |
| 539 | set_socket_options(f_in, "SO_KEEPALIVE"); |
| 540 | set_socket_options(f_in, lp_socket_options()); |
| 541 | set_nonblocking(f_in); |
| 542 | } |
| 543 | |
| 544 | io_printf(f_out, "@RSYNCD: %d\n", protocol_version); |
| 545 | |
| 546 | motd = lp_motd_file(); |
| 547 | if (motd && *motd) { |
| 548 | FILE *f = fopen(motd,"r"); |
| 549 | while (f && !feof(f)) { |
| 550 | int len = fread(line, 1, sizeof line - 1, f); |
| 551 | if (len > 0) { |
| 552 | line[len] = 0; |
| 553 | io_printf(f_out, "%s", line); |
| 554 | } |
| 555 | } |
| 556 | if (f) |
| 557 | fclose(f); |
| 558 | io_printf(f_out, "\n"); |
| 559 | } |
| 560 | |
| 561 | if (!read_line(f_in, line, sizeof line - 1)) |
| 562 | return -1; |
| 563 | |
| 564 | if (sscanf(line,"@RSYNCD: %d", &remote_protocol) != 1) { |
| 565 | io_printf(f_out, "@ERROR: protocol startup error\n"); |
| 566 | return -1; |
| 567 | } |
| 568 | if (protocol_version > remote_protocol) |
| 569 | protocol_version = remote_protocol; |
| 570 | |
| 571 | line[0] = 0; |
| 572 | if (!read_line(f_in, line, sizeof line - 1)) |
| 573 | return -1; |
| 574 | |
| 575 | if (!*line || strcmp(line, "#list") == 0) { |
| 576 | send_listing(f_out); |
| 577 | return -1; |
| 578 | } |
| 579 | |
| 580 | if (*line == '#') { |
| 581 | /* it's some sort of command that I don't understand */ |
| 582 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); |
| 583 | return -1; |
| 584 | } |
| 585 | |
| 586 | if ((i = lp_number(line)) < 0) { |
| 587 | char *addr = client_addr(f_in); |
| 588 | char *host = client_name(f_in); |
| 589 | rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n", |
| 590 | line, host, addr); |
| 591 | io_printf(f_out, "@ERROR: Unknown module '%s'\n", line); |
| 592 | return -1; |
| 593 | } |
| 594 | |
| 595 | return rsync_module(f_in, f_out, i); |
| 596 | } |
| 597 | |
| 598 | |
| 599 | int daemon_main(void) |
| 600 | { |
| 601 | char *pid_file; |
| 602 | |
| 603 | if (is_a_socket(STDIN_FILENO)) { |
| 604 | int i; |
| 605 | |
| 606 | /* we are running via inetd - close off stdout and |
| 607 | * stderr so that library functions (and getopt) don't |
| 608 | * try to use them. Redirect them to /dev/null */ |
| 609 | for (i = 1; i < 3; i++) { |
| 610 | close(i); |
| 611 | open("/dev/null", O_RDWR); |
| 612 | } |
| 613 | |
| 614 | return start_daemon(STDIN_FILENO, STDIN_FILENO); |
| 615 | } |
| 616 | |
| 617 | if (!no_detach) |
| 618 | become_daemon(); |
| 619 | |
| 620 | if (!lp_load(config_file, 1)) |
| 621 | exit_cleanup(RERR_SYNTAX); |
| 622 | |
| 623 | if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0) |
| 624 | rsync_port = RSYNC_PORT; |
| 625 | if (bind_address == NULL && *lp_bind_address()) |
| 626 | bind_address = lp_bind_address(); |
| 627 | |
| 628 | log_init(); |
| 629 | |
| 630 | rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n", |
| 631 | RSYNC_VERSION, rsync_port); |
| 632 | /* TODO: If listening on a particular address, then show that |
| 633 | * address too. In fact, why not just do inet_ntop on the |
| 634 | * local address??? */ |
| 635 | |
| 636 | if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) { |
| 637 | char pidbuf[16]; |
| 638 | int fd; |
| 639 | pid_t pid = getpid(); |
| 640 | cleanup_set_pid(pid); |
| 641 | if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC, |
| 642 | 0666 & ~orig_umask)) == -1) { |
| 643 | cleanup_set_pid(0); |
| 644 | rsyserr(FLOG, errno, "failed to create pid file %s", pid_file); |
| 645 | exit_cleanup(RERR_FILEIO); |
| 646 | } |
| 647 | snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); |
| 648 | write(fd, pidbuf, strlen(pidbuf)); |
| 649 | close(fd); |
| 650 | } |
| 651 | |
| 652 | start_accept_loop(rsync_port, start_daemon); |
| 653 | return -1; |
| 654 | } |