source3/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25
  26 static_decl_rpc;
  27
  28 static int am_parent = 1;
  29
  30 extern struct auth_context *negprot_global_auth_context;
  31 extern SIG_ATOMIC_T got_sig_term;
  32 extern SIG_ATOMIC_T reload_after_sighup;
  33 static SIG_ATOMIC_T got_sig_cld;
  34
  35 #ifdef WITH_DFS
  36 extern int dcelogin_atmost_once;
  37 #endif /* WITH_DFS */
  38
  39 /* really we should have a top level context structure that has the
  40    client file descriptor as an element. That would require a major rewrite :(
  41
  42    the following 2 functions are an alternative - they make the file
  43    descriptor private to smbd
  44  */
  45 static int server_fd = -1;
  46
  47 int smbd_server_fd(void)
  48 {
  49         return server_fd;
  50 }
  51
  52 static void smbd_set_server_fd(int fd)
  53 {
  54         server_fd = fd;
  55 }
  56
  57 int get_client_fd(void)
  58 {
  59         return server_fd;
  60 }
  61
  62 int client_get_tcp_info(struct sockaddr_in *server, struct sockaddr_in *client)
  63 {
  64         socklen_t length;
  65         if (server_fd == -1) {
  66                 return -1;
  67         }
  68         length = sizeof(*server);
  69         if (getsockname(server_fd, (struct sockaddr *)server, &length) != 0) {
  70                 return -1;
  71         }
  72         length = sizeof(*client);
  73         if (getpeername(server_fd, (struct sockaddr *)client, &length) != 0) {
  74                 return -1;
  75         }
  76         return 0;
  77 }
  78
  79 struct event_context *smbd_event_context(void)
  80 {
  81         static struct event_context *ctx;
  82
  83         if (!ctx && !(ctx = event_context_init(talloc_autofree_context()))) {
  84                 smb_panic("Could not init smbd event context");
  85         }
  86         return ctx;
  87 }
  88
  89 struct messaging_context *smbd_messaging_context(void)
  90 {
  91         static struct messaging_context *ctx;
  92
  93         if (ctx == NULL) {
  94                 ctx = messaging_init(talloc_autofree_context(), server_id_self(),
  95                                      smbd_event_context());
  96         }
  97         if (ctx == NULL) {
  98                 DEBUG(0, ("Could not init smbd messaging context.\n"));
  99         }
 100         return ctx;
 101 }
 102
 103 struct memcache *smbd_memcache(void)
 104 {
 105         static struct memcache *cache;
 106
 107         if (!cache
 108             && !(cache = memcache_init(talloc_autofree_context(),
 109                                        lp_max_stat_cache_size()*1024))) {
 110
 111                 smb_panic("Could not init smbd memcache");
 112         }
 113         return cache;
 114 }
 115
 116 /*******************************************************************
 117  What to do when smb.conf is updated.
 118  ********************************************************************/
 119
 120 static void smb_conf_updated(struct messaging_context *msg,
 121                              void *private_data,
 122                              uint32_t msg_type,
 123                              struct server_id server_id,
 124                              DATA_BLOB *data)
 125 {
 126         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
 127                   "updated. Reloading.\n"));
 128         reload_services(False);
 129 }
 130
 131
 132 /*******************************************************************
 133  Delete a statcache entry.
 134  ********************************************************************/
 135
 136 static void smb_stat_cache_delete(struct messaging_context *msg,
 137                                   void *private_data,
 138                                   uint32_t msg_tnype,
 139                                   struct server_id server_id,
 140                                   DATA_BLOB *data)
 141 {
 142         const char *name = (const char *)data->data;
 143         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 144         stat_cache_delete(name);
 145 }
 146
 147 /****************************************************************************
 148  Terminate signal.
 149 ****************************************************************************/
 150
 151 static void sig_term(void)
 152 {
 153         got_sig_term = 1;
 154         sys_select_signal(SIGTERM);
 155 }
 156
 157 /****************************************************************************
 158  Catch a sighup.
 159 ****************************************************************************/
 160
 161 static void sig_hup(int sig)
 162 {
 163         reload_after_sighup = 1;
 164         sys_select_signal(SIGHUP);
 165 }
 166
 167 /****************************************************************************
 168  Catch a sigcld
 169 ****************************************************************************/
 170 static void sig_cld(int sig)
 171 {
 172         got_sig_cld = 1;
 173         sys_select_signal(SIGCLD);
 174 }
 175
 176 /****************************************************************************
 177   Send a SIGTERM to our process group.
 178 *****************************************************************************/
 179
 180 static void  killkids(void)
 181 {
 182         if(am_parent) kill(0,SIGTERM);
 183 }
 184
 185 /****************************************************************************
 186  Process a sam sync message - not sure whether to do this here or
 187  somewhere else.
 188 ****************************************************************************/
 189
 190 static void msg_sam_sync(struct messaging_context *msg,
 191                          void *private_data,
 192                          uint32_t msg_type,
 193                          struct server_id server_id,
 194                          DATA_BLOB *data)
 195 {
 196         DEBUG(10, ("** sam sync message received, ignoring\n"));
 197 }
 198
 199
 200 /****************************************************************************
 201  Open the socket communication - inetd.
 202 ****************************************************************************/
 203
 204 static bool open_sockets_inetd(void)
 205 {
 206         /* Started from inetd. fd 0 is the socket. */
 207         /* We will abort gracefully when the client or remote system
 208            goes away */
 209         smbd_set_server_fd(dup(0));
 210
 211         /* close our standard file descriptors */
 212         close_low_fds(False); /* Don't close stderr */
 213
 214         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 215         set_socket_options(smbd_server_fd(), lp_socket_options());
 216
 217         return True;
 218 }
 219
 220 static void msg_exit_server(struct messaging_context *msg,
 221                             void *private_data,
 222                             uint32_t msg_type,
 223                             struct server_id server_id,
 224                             DATA_BLOB *data)
 225 {
 226         DEBUG(3, ("got a SHUTDOWN message\n"));
 227         exit_server_cleanly(NULL);
 228 }
 229
 230 #ifdef DEVELOPER
 231 static void msg_inject_fault(struct messaging_context *msg,
 232                              void *private_data,
 233                              uint32_t msg_type,
 234                              struct server_id src,
 235                              DATA_BLOB *data)
 236 {
 237         int sig;
 238
 239         if (data->length != sizeof(sig)) {
 240
 241                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
 242                           procid_str_static(&src)));
 243                 return;
 244         }
 245
 246         sig = *(int *)data->data;
 247         if (sig == -1) {
 248                 exit_server("internal error injected");
 249                 return;
 250         }
 251
 252 #if HAVE_STRSIGNAL
 253         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
 254                   procid_str_static(&src), sig, strsignal(sig)));
 255 #else
 256         DEBUG(0, ("Process %s requested injection of signal %d\n",
 257                   procid_str_static(&src), sig));
 258 #endif
 259
 260         kill(sys_getpid(), sig);
 261 }
 262 #endif /* DEVELOPER */
 263
 264 struct child_pid {
 265         struct child_pid *prev, *next;
 266         pid_t pid;
 267 };
 268
 269 static struct child_pid *children;
 270 static int num_children;
 271
 272 static void add_child_pid(pid_t pid)
 273 {
 274         struct child_pid *child;
 275
 276         if (lp_max_smbd_processes() == 0) {
 277                 /* Don't bother with the child list if we don't care anyway */
 278                 return;
 279         }
 280
 281         child = SMB_MALLOC_P(struct child_pid);
 282         if (child == NULL) {
 283                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 284                 return;
 285         }
 286         child->pid = pid;
 287         DLIST_ADD(children, child);
 288         num_children += 1;
 289 }
 290
 291 static void remove_child_pid(pid_t pid, bool unclean_shutdown)
 292 {
 293         struct child_pid *child;
 294
 295         if (unclean_shutdown) {
 296                 /* a child terminated uncleanly so tickle all processes to see
 297                    if they can grab any of the pending locks
 298                 */
 299                 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n", pid));
 300                 messaging_send_buf(smbd_messaging_context(), procid_self(),
 301                                    MSG_SMB_BRL_VALIDATE, NULL, 0);
 302                 message_send_all(smbd_messaging_context(),
 303                                  MSG_SMB_UNLOCK, NULL, 0, NULL);
 304         }
 305
 306         if (lp_max_smbd_processes() == 0) {
 307                 /* Don't bother with the child list if we don't care anyway */
 308                 return;
 309         }
 310
 311         for (child = children; child != NULL; child = child->next) {
 312                 if (child->pid == pid) {
 313                         struct child_pid *tmp = child;
 314                         DLIST_REMOVE(children, child);
 315                         SAFE_FREE(tmp);
 316                         num_children -= 1;
 317                         return;
 318                 }
 319         }
 320
 321         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 322 }
 323
 324 /****************************************************************************
 325  Have we reached the process limit ?
 326 ****************************************************************************/
 327
 328 static bool allowable_number_of_smbd_processes(void)
 329 {
 330         int max_processes = lp_max_smbd_processes();
 331
 332         if (!max_processes)
 333                 return True;
 334
 335         return num_children < max_processes;
 336 }
 337
 338 /****************************************************************************
 339  Open the socket communication.
 340 ****************************************************************************/
 341
 342 static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ports)
 343 {
 344         int num_interfaces = iface_count();
 345         int num_sockets = 0;
 346         int fd_listenset[FD_SETSIZE];
 347         fd_set listen_set;
 348         int s;
 349         int maxfd = 0;
 350         int i;
 351         char *ports;
 352         struct dns_reg_state * dns_reg = NULL;
 353         unsigned dns_port = 0;
 354
 355         if (!is_daemon) {
 356                 return open_sockets_inetd();
 357         }
 358
 359 #ifdef HAVE_ATEXIT
 360         {
 361                 static int atexit_set;
 362                 if(atexit_set == 0) {
 363                         atexit_set=1;
 364                         atexit(killkids);
 365                 }
 366         }
 367 #endif
 368
 369         /* Stop zombies */
 370         CatchSignal(SIGCLD, sig_cld);
 371
 372         FD_ZERO(&listen_set);
 373
 374         /* use a reasonable default set of ports - listing on 445 and 139 */
 375         if (!smb_ports) {
 376                 ports = lp_smb_ports();
 377                 if (!ports || !*ports) {
 378                         ports = smb_xstrdup(SMB_PORTS);
 379                 } else {
 380                         ports = smb_xstrdup(ports);
 381                 }
 382         } else {
 383                 ports = smb_xstrdup(smb_ports);
 384         }
 385
 386         if (lp_interfaces() && lp_bind_interfaces_only()) {
 387                 /* We have been given an interfaces line, and been
 388                    told to only bind to those interfaces. Create a
 389                    socket per interface and bind to only these.
 390                 */
 391
 392                 /* Now open a listen socket for each of the
 393                    interfaces. */
 394                 for(i = 0; i < num_interfaces; i++) {
 395                         TALLOC_CTX *frame = NULL;
 396                         const struct sockaddr_storage *ifss =
 397                                         iface_n_sockaddr_storage(i);
 398                         char *tok;
 399                         const char *ptr;
 400
 401                         if (ifss == NULL) {
 402                                 DEBUG(0,("open_sockets_smbd: "
 403                                         "interface %d has NULL IP address !\n",
 404                                         i));
 405                                 continue;
 406                         }
 407
 408                         frame = talloc_stackframe();
 409                         for (ptr=ports;
 410                                         next_token_talloc(frame,&ptr, &tok, " \t,");) {
 411                                 unsigned port = atoi(tok);
 412                                 if (port == 0 || port > 0xffff) {
 413                                         continue;
 414                                 }
 415
 416                                 /* Keep the first port for mDNS service
 417                                  * registration.
 418                                  */
 419                                 if (dns_port == 0) {
 420                                         dns_port = port;
 421                                 }
 422
 423                                 s = fd_listenset[num_sockets] =
 424                                         open_socket_in(SOCK_STREAM,
 425                                                         port,
 426                                                         num_sockets == 0 ? 0 : 2,
 427                                                         ifss,
 428                                                         true);
 429                                 if(s == -1) {
 430                                         continue;
 431                                 }
 432
 433                                 /* ready to listen */
 434                                 set_socket_options(s,"SO_KEEPALIVE");
 435                                 set_socket_options(s,lp_socket_options());
 436
 437                                 /* Set server socket to
 438                                  * non-blocking for the accept. */
 439                                 set_blocking(s,False);
 440
 441                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 442                                         DEBUG(0,("open_sockets_smbd: listen: "
 443                                                 "%s\n", strerror(errno)));
 444                                         close(s);
 445                                         TALLOC_FREE(frame);
 446                                         return False;
 447                                 }
 448                                 FD_SET(s,&listen_set);
 449                                 maxfd = MAX( maxfd, s);
 450
 451                                 num_sockets++;
 452                                 if (num_sockets >= FD_SETSIZE) {
 453                                         DEBUG(0,("open_sockets_smbd: Too "
 454                                                 "many sockets to bind to\n"));
 455                                         TALLOC_FREE(frame);
 456                                         return False;
 457                                 }
 458                         }
 459                         TALLOC_FREE(frame);
 460                 }
 461         } else {
 462                 /* Just bind to 0.0.0.0 - accept connections
 463                    from anywhere. */
 464
 465                 TALLOC_CTX *frame = talloc_stackframe();
 466                 char *tok;
 467                 const char *ptr;
 468                 const char *sock_addr = lp_socket_address();
 469                 char *sock_tok;
 470                 const char *sock_ptr;
 471
 472                 if (strequal(sock_addr, "0.0.0.0") ||
 473                     strequal(sock_addr, "::")) {
 474 #if HAVE_IPV6
 475                         sock_addr = "::,0.0.0.0";
 476 #else
 477                         sock_addr = "0.0.0.0";
 478 #endif
 479                 }
 480
 481                 for (sock_ptr=sock_addr;
 482                                 next_token_talloc(frame, &sock_ptr, &sock_tok, " \t,"); ) {
 483                         for (ptr=ports; next_token_talloc(frame, &ptr, &tok, " \t,"); ) {
 484                                 struct sockaddr_storage ss;
 485
 486                                 unsigned port = atoi(tok);
 487                                 if (port == 0 || port > 0xffff) {
 488                                         continue;
 489                                 }
 490
 491                                 /* Keep the first port for mDNS service
 492                                  * registration.
 493                                  */
 494                                 if (dns_port == 0) {
 495                                         dns_port = port;
 496                                 }
 497
 498                                 /* open an incoming socket */
 499                                 if (!interpret_string_addr(&ss, sock_tok,
 500                                                 AI_NUMERICHOST|AI_PASSIVE)) {
 501                                         continue;
 502                                 }
 503
 504                                 s = open_socket_in(SOCK_STREAM,
 505                                                 port,
 506                                                 num_sockets == 0 ? 0 : 2,
 507                                                 &ss,
 508                                                 true);
 509                                 if (s == -1) {
 510                                         continue;
 511                                 }
 512
 513                                 /* ready to listen */
 514                                 set_socket_options(s,"SO_KEEPALIVE");
 515                                 set_socket_options(s,lp_socket_options());
 516
 517                                 /* Set server socket to non-blocking
 518                                  * for the accept. */
 519                                 set_blocking(s,False);
 520
 521                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 522                                         DEBUG(0,("open_sockets_smbd: "
 523                                                 "listen: %s\n",
 524                                                  strerror(errno)));
 525                                         close(s);
 526                                         TALLOC_FREE(frame);
 527                                         return False;
 528                                 }
 529
 530                                 fd_listenset[num_sockets] = s;
 531                                 FD_SET(s,&listen_set);
 532                                 maxfd = MAX( maxfd, s);
 533
 534                                 num_sockets++;
 535
 536                                 if (num_sockets >= FD_SETSIZE) {
 537                                         DEBUG(0,("open_sockets_smbd: Too "
 538                                                 "many sockets to bind to\n"));
 539                                         TALLOC_FREE(frame);
 540                                         return False;
 541                                 }
 542                         }
 543                 }
 544                 TALLOC_FREE(frame);
 545         }
 546
 547         SAFE_FREE(ports);
 548
 549         if (num_sockets == 0) {
 550                 DEBUG(0,("open_sockets_smbd: No "
 551                         "sockets available to bind to.\n"));
 552                 return false;
 553         }
 554
 555         /* Setup the main smbd so that we can get messages. Note that
 556            do this after starting listening. This is needed as when in
 557            clustered mode, ctdb won't allow us to start doing database
 558            operations until it has gone thru a full startup, which
 559            includes checking to see that smbd is listening. */
 560         claim_connection(NULL,"",
 561                          FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_DBWRAP);
 562
 563         /* Listen to messages */
 564
 565         messaging_register(smbd_messaging_context(), NULL,
 566                            MSG_SMB_SAM_SYNC, msg_sam_sync);
 567         messaging_register(smbd_messaging_context(), NULL,
 568                            MSG_SHUTDOWN, msg_exit_server);
 569         messaging_register(smbd_messaging_context(), NULL,
 570                            MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 571         messaging_register(smbd_messaging_context(), NULL,
 572                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 573         messaging_register(smbd_messaging_context(), NULL,
 574                            MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
 575         brl_register_msgs(smbd_messaging_context());
 576
 577 #ifdef CLUSTER_SUPPORT
 578         if (lp_clustering()) {
 579                 ctdbd_register_reconfigure(messaging_ctdbd_connection());
 580         }
 581 #endif
 582
 583 #ifdef DEVELOPER
 584         messaging_register(smbd_messaging_context(), NULL,
 585                            MSG_SMB_INJECT_FAULT, msg_inject_fault);
 586 #endif
 587
 588         /* now accept incoming connections - forking a new process
 589            for each incoming connection */
 590         DEBUG(2,("waiting for a connection\n"));
 591         while (1) {
 592                 struct timeval now, idle_timeout;
 593                 fd_set r_fds, w_fds;
 594                 int num;
 595
 596                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 597                 message_dispatch(smbd_messaging_context());
 598
 599                 if (got_sig_cld) {
 600                         pid_t pid;
 601                         int status;
 602
 603                         got_sig_cld = False;
 604
 605                         while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
 606                                 bool unclean_shutdown = False;
 607
 608                                 /* If the child terminated normally, assume
 609                                    it was an unclean shutdown unless the
 610                                    status is 0
 611                                 */
 612                                 if (WIFEXITED(status)) {
 613                                         unclean_shutdown = WEXITSTATUS(status);
 614                                 }
 615                                 /* If the child terminated due to a signal
 616                                    we always assume it was unclean.
 617                                 */
 618                                 if (WIFSIGNALED(status)) {
 619                                         unclean_shutdown = True;
 620                                 }
 621                                 remove_child_pid(pid, unclean_shutdown);
 622                         }
 623                 }
 624
 625                 idle_timeout = timeval_zero();
 626
 627                 memcpy((char *)&r_fds, (char *)&listen_set,
 628                        sizeof(listen_set));
 629                 FD_ZERO(&w_fds);
 630                 GetTimeOfDay(&now);
 631
 632                 /* Kick off our mDNS registration. */
 633                 if (dns_port != 0) {
 634                         dns_register_smbd(&dns_reg, dns_port, &maxfd,
 635                                         &r_fds, &idle_timeout);
 636                 }
 637
 638                 event_add_to_select_args(smbd_event_context(), &now,
 639                                          &r_fds, &w_fds, &idle_timeout,
 640                                          &maxfd);
 641
 642                 num = sys_select(maxfd+1,&r_fds,&w_fds,NULL,
 643                                  timeval_is_zero(&idle_timeout) ?
 644                                  NULL : &idle_timeout);
 645
 646                 if (num == -1 && errno == EINTR) {
 647                         if (got_sig_term) {
 648                                 exit_server_cleanly(NULL);
 649                         }
 650
 651                         /* check for sighup processing */
 652                         if (reload_after_sighup) {
 653                                 change_to_root_user();
 654                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 655                                 reload_services(False);
 656                                 reload_after_sighup = 0;
 657                         }
 658
 659                         continue;
 660                 }
 661
 662
 663                 /* If the idle timeout fired and we don't have any connected
 664                  * users, exit gracefully. We should be running under a process
 665                  * controller that will restart us if necessry.
 666                  */
 667                 if (num == 0 && count_all_current_connections() == 0) {
 668                         exit_server_cleanly("idle timeout");
 669                 }
 670
 671                 /* process pending nDNS responses */
 672                 if (dns_register_smbd_reply(dns_reg, &r_fds, &idle_timeout)) {
 673                         --num;
 674                 }
 675
 676                 if (run_events(smbd_event_context(), num, &r_fds, &w_fds)) {
 677                         continue;
 678                 }
 679
 680                 /* check if we need to reload services */
 681                 check_reload(time(NULL));
 682
 683                 /* Find the sockets that are read-ready -
 684                    accept on these. */
 685                 for( ; num > 0; num--) {
 686                         struct sockaddr addr;
 687                         socklen_t in_addrlen = sizeof(addr);
 688                         pid_t child = 0;
 689
 690                         s = -1;
 691                         for(i = 0; i < num_sockets; i++) {
 692                                 if(FD_ISSET(fd_listenset[i],&r_fds)) {
 693                                         s = fd_listenset[i];
 694                                         /* Clear this so we don't look
 695                                            at it again. */
 696                                         FD_CLR(fd_listenset[i],&r_fds);
 697                                         break;
 698                                 }
 699                         }
 700
 701                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 702
 703                         if (smbd_server_fd() == -1 && errno == EINTR)
 704                                 continue;
 705
 706                         if (smbd_server_fd() == -1) {
 707                                 DEBUG(2,("open_sockets_smbd: accept: %s\n",
 708                                          strerror(errno)));
 709                                 continue;
 710                         }
 711
 712                         /* Ensure child is set to blocking mode */
 713                         set_blocking(smbd_server_fd(),True);
 714
 715                         if (smbd_server_fd() != -1 && interactive)
 716                                 return True;
 717
 718                         if (allowable_number_of_smbd_processes() &&
 719                             smbd_server_fd() != -1 &&
 720                             ((child = sys_fork())==0)) {
 721                                 char remaddr[INET6_ADDRSTRLEN];
 722
 723                                 /* Child code ... */
 724
 725                                 /* Stop zombies, the parent explicitly handles
 726                                  * them, counting worker smbds. */
 727                                 CatchChild();
 728
 729                                 /* close the listening socket(s) */
 730                                 for(i = 0; i < num_sockets; i++)
 731                                         close(fd_listenset[i]);
 732
 733                                 /* close our mDNS daemon handle */
 734                                 dns_register_close(&dns_reg);
 735
 736                                 /* close our standard file
 737                                    descriptors */
 738                                 close_low_fds(False);
 739                                 am_parent = 0;
 740
 741                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 742                                 set_socket_options(smbd_server_fd(),
 743                                                    lp_socket_options());
 744
 745                                 /* this is needed so that we get decent entries
 746                                    in smbstatus for port 445 connects */
 747                                 set_remote_machine_name(get_peer_addr(smbd_server_fd(),
 748                                                                 remaddr,
 749                                                                 sizeof(remaddr)),
 750                                                                 false);
 751
 752                                 if (!reinit_after_fork(
 753                                             smbd_messaging_context(), true)) {
 754                                         DEBUG(0,("reinit_after_fork() failed\n"));
 755                                         smb_panic("reinit_after_fork() failed");
 756                                 }
 757
 758                                 return True;
 759                         }
 760                         /* The parent doesn't need this socket */
 761                         close(smbd_server_fd());
 762
 763                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 764                                 Clear the closed fd info out of server_fd --
 765                                 and more importantly, out of client_fd in
 766                                 util_sock.c, to avoid a possible
 767                                 getpeername failure if we reopen the logs
 768                                 and use %I in the filename.
 769                         */
 770
 771                         smbd_set_server_fd(-1);
 772
 773                         if (child != 0) {
 774                                 add_child_pid(child);
 775                         }
 776
 777                         /* Force parent to check log size after
 778                          * spawning child.  Fix from
 779                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 780                          * parent smbd will log to logserver.smb.  It
 781                          * writes only two messages for each child
 782                          * started/finished. But each child writes,
 783                          * say, 50 messages also in logserver.smb,
 784                          * begining with the debug_count of the
 785                          * parent, before the child opens its own log
 786                          * file logserver.client. In a worst case
 787                          * scenario the size of logserver.smb would be
 788                          * checked after about 50*50=2500 messages
 789                          * (ca. 100kb).
 790                          * */
 791                         force_check_log_size();
 792
 793                 } /* end for num */
 794         } /* end while 1 */
 795
 796 /* NOTREACHED   return True; */
 797 }
 798
 799 /****************************************************************************
 800  Reload printers
 801 **************************************************************************/
 802 void reload_printers(void)
 803 {
 804         int snum;
 805         int n_services = lp_numservices();
 806         int pnum = lp_servicenumber(PRINTERS_NAME);
 807         const char *pname;
 808
 809         pcap_cache_reload();
 810
 811         /* remove stale printers */
 812         for (snum = 0; snum < n_services; snum++) {
 813                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 814                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 815                                       lp_autoloaded(snum)))
 816                         continue;
 817
 818                 pname = lp_printername(snum);
 819                 if (!pcap_printername_ok(pname)) {
 820                         DEBUG(3, ("removing stale printer %s\n", pname));
 821
 822                         if (is_printer_published(NULL, snum, NULL))
 823                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 824                         del_a_printer(pname);
 825                         lp_killservice(snum);
 826                 }
 827         }
 828
 829         load_printers();
 830 }
 831
 832 /****************************************************************************
 833  Reload the services file.
 834 **************************************************************************/
 835
 836 bool reload_services(bool test)
 837 {
 838         bool ret;
 839
 840         if (lp_loaded()) {
 841                 char *fname = lp_configfile();
 842                 if (file_exist(fname) &&
 843                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 844                         set_dyn_CONFIGFILE(fname);
 845                         test = False;
 846                 }
 847         }
 848
 849         reopen_logs();
 850
 851         if (test && !lp_file_list_changed())
 852                 return(True);
 853
 854         lp_killunused(conn_snum_used);
 855
 856         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 857
 858         reload_printers();
 859
 860         /* perhaps the config filename is now set */
 861         if (!test)
 862                 reload_services(True);
 863
 864         reopen_logs();
 865
 866         load_interfaces();
 867
 868         if (smbd_server_fd() != -1) {
 869                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 870                 set_socket_options(smbd_server_fd(), lp_socket_options());
 871         }
 872
 873         mangle_reset_cache();
 874         reset_stat_cache();
 875
 876         /* this forces service parameters to be flushed */
 877         set_current_service(NULL,0,True);
 878
 879         return(ret);
 880 }
 881
 882 /****************************************************************************
 883  Exit the server.
 884 ****************************************************************************/
 885
 886 /* Reasons for shutting down a server process. */
 887 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 888
 889 static void exit_server_common(enum server_exit_reason how,
 890         const char *const reason) _NORETURN_;
 891
 892 static void exit_server_common(enum server_exit_reason how,
 893         const char *const reason)
 894 {
 895         static int firsttime=1;
 896         bool had_open_conn;
 897
 898         if (!firsttime)
 899                 exit(0);
 900         firsttime = 0;
 901
 902         change_to_root_user();
 903
 904         if (negprot_global_auth_context) {
 905                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 906         }
 907
 908         had_open_conn = conn_close_all();
 909
 910         invalidate_all_vuids();
 911
 912         /* 3 second timeout. */
 913         print_notify_send_messages(smbd_messaging_context(), 3);
 914
 915         /* delete our entry in the connections database. */
 916         yield_connection(NULL,"");
 917
 918         respond_to_all_remaining_local_messages();
 919
 920 #ifdef WITH_DFS
 921         if (dcelogin_atmost_once) {
 922                 dfs_unlogin();
 923         }
 924 #endif
 925
 926 #ifdef USE_DMAPI
 927         /* Destroy Samba DMAPI session only if we are master smbd process */
 928         if (am_parent) {
 929                 if (!dmapi_destroy_session()) {
 930                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 931                 }
 932         }
 933 #endif
 934
 935         locking_end();
 936         printing_end();
 937
 938         if (how != SERVER_EXIT_NORMAL) {
 939                 int oldlevel = DEBUGLEVEL;
 940
 941                 DEBUGLEVEL = 10;
 942
 943                 DEBUGSEP(0);
 944                 DEBUG(0,("Abnormal server exit: %s\n",
 945                         reason ? reason : "no explanation provided"));
 946                 DEBUGSEP(0);
 947
 948                 log_stack_trace();
 949
 950                 DEBUGLEVEL = oldlevel;
 951                 dump_core();
 952
 953         } else {
 954                 DEBUG(3,("Server exit (%s)\n",
 955                         (reason ? reason : "normal exit")));
 956         }
 957
 958         /* if we had any open SMB connections when we exited then we
 959            need to tell the parent smbd so that it can trigger a retry
 960            of any locks we may have been holding or open files we were
 961            blocking */
 962         if (had_open_conn) {
 963                 exit(1);
 964         } else {
 965                 exit(0);
 966         }
 967 }
 968
 969 void exit_server(const char *const explanation)
 970 {
 971         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 972 }
 973
 974 void exit_server_cleanly(const char *const explanation)
 975 {
 976         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 977 }
 978
 979 void exit_server_fault(void)
 980 {
 981         exit_server("critical server fault");
 982 }
 983
 984
 985 /****************************************************************************
 986 received when we should release a specific IP
 987 ****************************************************************************/
 988 static void release_ip(const char *ip, void *priv)
 989 {
 990         char addr[INET6_ADDRSTRLEN];
 991
 992         if (strcmp(client_socket_addr(get_client_fd(),addr,sizeof(addr)), ip) == 0) {
 993                 /* we can't afford to do a clean exit - that involves
 994                    database writes, which would potentially mean we
 995                    are still running after the failover has finished -
 996                    we have to get rid of this process ID straight
 997                    away */
 998                 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
 999                         ip));
1000                 /* note we must exit with non-zero status so the unclean handler gets
1001                    called in the parent, so that the brl database is tickled */
1002                 _exit(1);
1003         }
1004 }
1005
1006 static void msg_release_ip(struct messaging_context *msg_ctx, void *private_data,
1007                            uint32_t msg_type, struct server_id server_id, DATA_BLOB *data)
1008 {
1009         release_ip((char *)data->data, NULL);
1010 }
1011
1012 /****************************************************************************
1013  Initialise connect, service and file structs.
1014 ****************************************************************************/
1015
1016 static bool init_structs(void )
1017 {
1018         /*
1019          * Set the machine NETBIOS name if not already
1020          * set from the config file.
1021          */
1022
1023         if (!init_names())
1024                 return False;
1025
1026         conn_init();
1027
1028         file_init();
1029
1030         /* for RPC pipes */
1031         init_rpc_pipe_hnd();
1032
1033         init_dptrs();
1034
1035         if (!secrets_init())
1036                 return False;
1037
1038         return True;
1039 }
1040
1041 /*
1042  * Send keepalive packets to our client
1043  */
1044 static bool keepalive_fn(const struct timeval *now, void *private_data)
1045 {
1046         if (!send_keepalive(smbd_server_fd())) {
1047                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1048                 return False;
1049         }
1050         return True;
1051 }
1052
1053 /*
1054  * Do the recurring check if we're idle
1055  */
1056 static bool deadtime_fn(const struct timeval *now, void *private_data)
1057 {
1058         if ((conn_num_open() == 0)
1059             || (conn_idle_all(now->tv_sec))) {
1060                 DEBUG( 2, ( "Closing idle connection\n" ) );
1061                 messaging_send(smbd_messaging_context(), procid_self(),
1062                                MSG_SHUTDOWN, &data_blob_null);
1063                 return False;
1064         }
1065
1066         return True;
1067 }
1068
1069 /*
1070  * Do the recurring log file and smb.conf reload checks.
1071  */
1072
1073 static bool housekeeping_fn(const struct timeval *now, void *private_data)
1074 {
1075         change_to_root_user();
1076
1077         /* update printer queue caches if necessary */
1078         update_monitored_printq_cache();
1079
1080         /* check if we need to reload services */
1081         check_reload(time(NULL));
1082
1083         /* Change machine password if neccessary. */
1084         attempt_machine_password_change();
1085
1086         /*
1087          * Force a log file check.
1088          */
1089         force_check_log_size();
1090         check_log_size();
1091         return true;
1092 }
1093
1094 /****************************************************************************
1095  main program.
1096 ****************************************************************************/
1097
1098 /* Declare prototype for build_options() to avoid having to run it through
1099    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1100    prototype generation system is too complicated. */
1101
1102 extern void build_options(bool screen);
1103
1104  int main(int argc,const char *argv[])
1105 {
1106         /* shall I run as a daemon */
1107         static bool is_daemon = False;
1108         static bool interactive = False;
1109         static bool Fork = True;
1110         static bool no_process_group = False;
1111         static bool log_stdout = False;
1112         static char *ports = NULL;
1113         static char *profile_level = NULL;
1114         int opt;
1115         poptContext pc;
1116         bool print_build_options = False;
1117         enum {
1118                 OPT_DAEMON = 1000,
1119                 OPT_INTERACTIVE,
1120                 OPT_FORK,
1121                 OPT_NO_PROCESS_GROUP,
1122                 OPT_LOG_STDOUT
1123         };
1124         struct poptOption long_options[] = {
1125         POPT_AUTOHELP
1126         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1127         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1128         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1129         {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1130         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1131         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1132         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1133         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1134         POPT_COMMON_SAMBA
1135         POPT_COMMON_DYNCONFIG
1136         POPT_TABLEEND
1137         };
1138         TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
1139
1140         TimeInit();
1141
1142 #ifdef HAVE_SET_AUTH_PARAMETERS
1143         set_auth_parameters(argc,argv);
1144 #endif
1145
1146         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1147         while((opt = poptGetNextOpt(pc)) != -1) {
1148                 switch (opt)  {
1149                 case OPT_DAEMON:
1150                         is_daemon = true;
1151                         break;
1152                 case OPT_INTERACTIVE:
1153                         interactive = true;
1154                         break;
1155                 case OPT_FORK:
1156                         Fork = false;
1157                         break;
1158                 case OPT_NO_PROCESS_GROUP:
1159                         no_process_group = true;
1160                         break;
1161                 case OPT_LOG_STDOUT:
1162                         log_stdout = true;
1163                         break;
1164                 case 'b':
1165                         print_build_options = True;
1166                         break;
1167                 default:
1168                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1169                                   poptBadOption(pc, 0), poptStrerror(opt));
1170                         poptPrintUsage(pc, stderr, 0);
1171                         exit(1);
1172                 }
1173         }
1174         poptFreeContext(pc);
1175
1176         if (interactive) {
1177                 Fork = False;
1178                 log_stdout = True;
1179         }
1180
1181         setup_logging(argv[0],log_stdout);
1182
1183         if (print_build_options) {
1184                 build_options(True); /* Display output to screen as well as debug */
1185                 exit(0);
1186         }
1187
1188         load_case_tables();
1189
1190 #ifdef HAVE_SETLUID
1191         /* needed for SecureWare on SCO */
1192         setluid(0);
1193 #endif
1194
1195         sec_init();
1196
1197         set_remote_machine_name("smbd", False);
1198
1199         if (interactive && (DEBUGLEVEL >= 9)) {
1200                 talloc_enable_leak_report();
1201         }
1202
1203         if (log_stdout && Fork) {
1204                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1205                 exit(1);
1206         }
1207
1208         /* we want to re-seed early to prevent time delays causing
1209            client problems at a later date. (tridge) */
1210         generate_random_buffer(NULL, 0);
1211
1212         /* make absolutely sure we run as root - to handle cases where people
1213            are crazy enough to have it setuid */
1214
1215         gain_root_privilege();
1216         gain_root_group_privilege();
1217
1218         fault_setup((void (*)(void *))exit_server_fault);
1219         dump_core_setup("smbd");
1220
1221         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
1222         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
1223
1224         /* we are never interested in SIGPIPE */
1225         BlockSignals(True,SIGPIPE);
1226
1227 #if defined(SIGFPE)
1228         /* we are never interested in SIGFPE */
1229         BlockSignals(True,SIGFPE);
1230 #endif
1231
1232 #if defined(SIGUSR2)
1233         /* We are no longer interested in USR2 */
1234         BlockSignals(True,SIGUSR2);
1235 #endif
1236
1237         /* POSIX demands that signals are inherited. If the invoking process has
1238          * these signals masked, we will have problems, as we won't recieve them. */
1239         BlockSignals(False, SIGHUP);
1240         BlockSignals(False, SIGUSR1);
1241         BlockSignals(False, SIGTERM);
1242
1243         /* we want total control over the permissions on created files,
1244            so set our umask to 0 */
1245         umask(0);
1246
1247         init_sec_ctx();
1248
1249         reopen_logs();
1250
1251         DEBUG(0,("smbd version %s started.\n", SAMBA_VERSION_STRING));
1252         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1253
1254         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1255                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1256
1257         /* Output the build options to the debug log */
1258         build_options(False);
1259
1260         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1261                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1262                 exit(1);
1263         }
1264
1265         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1266                 DEBUG(0, ("error opening config file\n"));
1267                 exit(1);
1268         }
1269
1270         if (smbd_messaging_context() == NULL)
1271                 exit(1);
1272
1273         if (!reload_services(False))
1274                 return(-1);
1275
1276         init_structs();
1277
1278 #ifdef WITH_PROFILE
1279         if (!profile_setup(smbd_messaging_context(), False)) {
1280                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1281                 return -1;
1282         }
1283         if (profile_level != NULL) {
1284                 int pl = atoi(profile_level);
1285                 struct server_id src;
1286
1287                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1288                 src.pid = getpid();
1289                 set_profile_level(pl, src);
1290         }
1291 #endif
1292
1293         DEBUG(3,( "loaded services\n"));
1294
1295         if (!is_daemon && !is_a_socket(0)) {
1296                 if (!interactive)
1297                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1298
1299                 /*
1300                  * Setting is_daemon here prevents us from eventually calling
1301                  * the open_sockets_inetd()
1302                  */
1303
1304                 is_daemon = True;
1305         }
1306
1307         if (is_daemon && !interactive) {
1308                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1309                 become_daemon(Fork, no_process_group);
1310         }
1311
1312 #if HAVE_SETPGID
1313         /*
1314          * If we're interactive we want to set our own process group for
1315          * signal management.
1316          */
1317         if (interactive && !no_process_group)
1318                 setpgid( (pid_t)0, (pid_t)0);
1319 #endif
1320
1321         if (!directory_exist(lp_lockdir()))
1322                 mkdir(lp_lockdir(), 0755);
1323
1324         if (is_daemon)
1325                 pidfile_create("smbd");
1326
1327         if (!reinit_after_fork(smbd_messaging_context(), false)) {
1328                 DEBUG(0,("reinit_after_fork() failed\n"));
1329                 exit(1);
1330         }
1331
1332         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1333
1334         if (smbd_memcache() == NULL) {
1335                 exit(1);
1336         }
1337
1338         memcache_set_global(smbd_memcache());
1339
1340         /* Initialise the password backed before the global_sam_sid
1341            to ensure that we fetch from ldap before we make a domain sid up */
1342
1343         if(!initialize_password_db(False, smbd_event_context()))
1344                 exit(1);
1345
1346         if (!secrets_init()) {
1347                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1348                 exit(1);
1349         }
1350
1351         if(!get_global_sam_sid()) {
1352                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1353                 exit(1);
1354         }
1355
1356         if (!session_init())
1357                 exit(1);
1358
1359         if (!connections_init(True))
1360                 exit(1);
1361
1362         if (!locking_init())
1363                 exit(1);
1364
1365         namecache_enable();
1366
1367         if (!W_ERROR_IS_OK(registry_init_full()))
1368                 exit(1);
1369
1370 #if 0
1371         if (!init_svcctl_db())
1372                 exit(1);
1373 #endif
1374
1375         if (!print_backend_init(smbd_messaging_context()))
1376                 exit(1);
1377
1378         if (!init_guest_info()) {
1379                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1380                 return -1;
1381         }
1382
1383         /* only start the background queue daemon if we are
1384            running as a daemon -- bad things will happen if
1385            smbd is launched via inetd and we fork a copy of
1386            ourselves here */
1387
1388         if (is_daemon && !interactive
1389             && lp_parm_bool(-1, "smbd", "backgroundqueue", true)) {
1390                 start_background_queue();
1391         }
1392
1393         if (!open_sockets_smbd(is_daemon, interactive, ports))
1394                 exit(1);
1395
1396         /*
1397          * everything after this point is run after the fork()
1398          */
1399
1400         static_init_rpc;
1401
1402         init_modules();
1403
1404         /* Possibly reload the services file. Only worth doing in
1405          * daemon mode. In inetd mode, we know we only just loaded this.
1406          */
1407         if (is_daemon) {
1408                 reload_services(True);
1409         }
1410
1411         if (!init_account_policy()) {
1412                 DEBUG(0,("Could not open account policy tdb.\n"));
1413                 exit(1);
1414         }
1415
1416         if (*lp_rootdir()) {
1417                 if (chroot(lp_rootdir()) == 0)
1418                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1419         }
1420
1421         /* Setup oplocks */
1422         if (!init_oplocks(smbd_messaging_context()))
1423                 exit(1);
1424
1425         /* Setup aio signal handler. */
1426         initialize_async_io_handler();
1427
1428         /* register our message handlers */
1429         messaging_register(smbd_messaging_context(), NULL,
1430                            MSG_SMB_FORCE_TDIS, msg_force_tdis);
1431         messaging_register(smbd_messaging_context(), NULL,
1432                            MSG_SMB_RELEASE_IP, msg_release_ip);
1433         messaging_register(smbd_messaging_context(), NULL,
1434                            MSG_SMB_CLOSE_FILE, msg_close_file);
1435
1436         if ((lp_keepalive() != 0)
1437             && !(event_add_idle(smbd_event_context(), NULL,
1438                                 timeval_set(lp_keepalive(), 0),
1439                                 "keepalive", keepalive_fn,
1440                                 NULL))) {
1441                 DEBUG(0, ("Could not add keepalive event\n"));
1442                 exit(1);
1443         }
1444
1445         if (!(event_add_idle(smbd_event_context(), NULL,
1446                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1447                              "deadtime", deadtime_fn, NULL))) {
1448                 DEBUG(0, ("Could not add deadtime event\n"));
1449                 exit(1);
1450         }
1451
1452         if (!(event_add_idle(smbd_event_context(), NULL,
1453                              timeval_set(SMBD_SELECT_TIMEOUT, 0),
1454                              "housekeeping", housekeeping_fn, NULL))) {
1455                 DEBUG(0, ("Could not add housekeeping event\n"));
1456                 exit(1);
1457         }
1458
1459 #ifdef CLUSTER_SUPPORT
1460
1461         if (lp_clustering()) {
1462                 /*
1463                  * We need to tell ctdb about our client's TCP
1464                  * connection, so that for failover ctdbd can send
1465                  * tickle acks, triggering a reconnection by the
1466                  * client.
1467                  */
1468
1469                 struct sockaddr_in srv, clnt;
1470
1471                 if (client_get_tcp_info(&srv, &clnt) == 0) {
1472
1473                         NTSTATUS status;
1474
1475                         status = ctdbd_register_ips(
1476                                 messaging_ctdbd_connection(),
1477                                 &srv, &clnt, release_ip, NULL);
1478
1479                         if (!NT_STATUS_IS_OK(status)) {
1480                                 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
1481                                           nt_errstr(status)));
1482                         }
1483                 } else
1484                 {
1485                         DEBUG(0,("Unable to get tcp info for "
1486                                  "CTDB_CONTROL_TCP_CLIENT: %s\n",
1487                                  strerror(errno)));
1488                 }
1489         }
1490
1491 #endif
1492
1493         TALLOC_FREE(frame);
1494
1495         smbd_process();
1496
1497         namecache_shutdown();
1498
1499         exit_server_cleanly(NULL);
1500         return(0);
1501 }