source/nmbd/nmbd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT netbios routines and daemon - version 2
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jeremy Allison 1997-2002
   6    Copyright (C) Jelmer Vernooij 2002 (Conversion to popt)
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  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.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #include "includes.h"
  25
  26 int ClientNMB       = -1;
  27 int ClientDGRAM     = -1;
  28 int global_nmb_port = -1;
  29
  30 extern BOOL global_in_nmbd;
  31
  32 /* are we running as a daemon ? */
  33 static BOOL is_daemon = False;
  34
  35 /* fork or run in foreground ? */
  36 static BOOL Fork = True;
  37
  38 /* log to standard output ? */
  39 static BOOL log_stdout = False;
  40
  41 /* have we found LanMan clients yet? */
  42 BOOL found_lm_clients = False;
  43
  44 /* what server type are we currently */
  45
  46 time_t StartupTime = 0;
  47
  48 /**************************************************************************** **
  49  Handle a SIGTERM in band.
  50  **************************************************************************** */
  51
  52 static void terminate(void)
  53 {
  54         DEBUG(0,("Got SIGTERM: going down...\n"));
  55
  56         /* Write out wins.dat file if samba is a WINS server */
  57         wins_write_database(False);
  58
  59         /* Remove all SELF registered names from WINS */
  60         release_wins_names();
  61
  62         /* Announce all server entries as 0 time-to-live, 0 type. */
  63         announce_my_servers_removed();
  64
  65         /* If there was an async dns child - kill it. */
  66         kill_async_dns_child();
  67
  68         exit(0);
  69 }
  70
  71 /**************************************************************************** **
  72  Handle a SHUTDOWN message from smbcontrol.
  73  **************************************************************************** */
  74
  75 static void nmbd_terminate(int msg_type, pid_t src, void *buf, size_t len)
  76 {
  77         terminate();
  78 }
  79
  80 /**************************************************************************** **
  81  Catch a SIGTERM signal.
  82  **************************************************************************** */
  83
  84 static SIG_ATOMIC_T got_sig_term;
  85
  86 static void sig_term(int sig)
  87 {
  88         got_sig_term = 1;
  89         sys_select_signal();
  90 }
  91
  92 /**************************************************************************** **
  93  Catch a SIGHUP signal.
  94  **************************************************************************** */
  95
  96 static SIG_ATOMIC_T reload_after_sighup;
  97
  98 static void sig_hup(int sig)
  99 {
 100         reload_after_sighup = 1;
 101         sys_select_signal();
 102 }
 103
 104 /*******************************************************************
 105  Print out all talloc memory info.
 106 ********************************************************************/
 107
 108 void return_all_talloc_info(int msg_type, pid_t src_pid, void *buf, size_t len)
 109 {
 110         TALLOC_CTX *ctx = talloc_init("info context");
 111         char *info = NULL;
 112
 113         if (!ctx)
 114                 return;
 115
 116         info = talloc_describe_all(ctx);
 117         if (info)
 118                 DEBUG(10,(info));
 119         message_send_pid(src_pid, MSG_TALLOC_USAGE, info, info ? strlen(info) + 1 : 0, True);
 120         talloc_destroy(ctx);
 121 }
 122
 123 #if DUMP_CORE
 124 /**************************************************************************** **
 125  Prepare to dump a core file - carefully!
 126  **************************************************************************** */
 127
 128 static BOOL dump_core(void)
 129 {
 130         char *p;
 131         pstring dname;
 132         pstrcpy( dname, lp_logfile() );
 133         if ((p=strrchr_m(dname,'/')))
 134                 *p=0;
 135         pstrcat( dname, "/corefiles" );
 136         mkdir( dname, 0700 );
 137         sys_chown( dname, getuid(), getgid() );
 138         chmod( dname, 0700 );
 139         if ( chdir(dname) )
 140                 return( False );
 141         umask( ~(0700) );
 142
 143 #ifdef HAVE_GETRLIMIT
 144 #ifdef RLIMIT_CORE
 145         {
 146                 struct rlimit rlp;
 147                 getrlimit( RLIMIT_CORE, &rlp );
 148                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
 149                 setrlimit( RLIMIT_CORE, &rlp );
 150                 getrlimit( RLIMIT_CORE, &rlp );
 151                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
 152         }
 153 #endif
 154 #endif
 155
 156
 157         DEBUG(0,("Dumping core in %s\n",dname));
 158         abort();
 159         return( True );
 160 }
 161 #endif
 162
 163 /**************************************************************************** **
 164  Possibly continue after a fault.
 165  **************************************************************************** */
 166
 167 static void fault_continue(void)
 168 {
 169 #if DUMP_CORE
 170         dump_core();
 171 #endif
 172 }
 173
 174 /**************************************************************************** **
 175  Expire old names from the namelist and server list.
 176  **************************************************************************** */
 177
 178 static void expire_names_and_servers(time_t t)
 179 {
 180         static time_t lastrun = 0;
 181
 182         if ( !lastrun )
 183                 lastrun = t;
 184         if ( t < (lastrun + 5) )
 185                 return;
 186         lastrun = t;
 187
 188         /*
 189          * Expire any timed out names on all the broadcast
 190          * subnets and those registered with the WINS server.
 191          * (nmbd_namelistdb.c)
 192          */
 193
 194         expire_names(t);
 195
 196         /*
 197          * Go through all the broadcast subnets and for each
 198          * workgroup known on that subnet remove any expired
 199          * server names. If a workgroup has an empty serverlist
 200          * and has itself timed out then remove the workgroup.
 201          * (nmbd_workgroupdb.c)
 202          */
 203
 204         expire_workgroups_and_servers(t);
 205 }
 206
 207 /************************************************************************** **
 208  Reload the list of network interfaces.
 209  ************************************************************************** */
 210
 211 static BOOL reload_interfaces(time_t t)
 212 {
 213         static time_t lastt;
 214         int n;
 215         struct subnet_record *subrec;
 216         extern BOOL rescan_listen_set;
 217         extern struct in_addr loopback_ip;
 218
 219         if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) return False;
 220         lastt = t;
 221
 222         if (!interfaces_changed()) return False;
 223
 224         /* the list of probed interfaces has changed, we may need to add/remove
 225            some subnets */
 226         load_interfaces();
 227
 228         /* find any interfaces that need adding */
 229         for (n=iface_count() - 1; n >= 0; n--) {
 230                 struct interface *iface = get_interface(n);
 231
 232                 /*
 233                  * We don't want to add a loopback interface, in case
 234                  * someone has added 127.0.0.1 for smbd, nmbd needs to
 235                  * ignore it here. JRA.
 236                  */
 237
 238                 if (ip_equal(iface->ip, loopback_ip)) {
 239                         DEBUG(2,("reload_interfaces: Ignoring loopback interface %s\n", inet_ntoa(iface->ip)));
 240                         continue;
 241                 }
 242
 243                 for (subrec=subnetlist; subrec; subrec=subrec->next) {
 244                         if (ip_equal(iface->ip, subrec->myip) &&
 245                             ip_equal(iface->nmask, subrec->mask_ip)) break;
 246                 }
 247
 248                 if (!subrec) {
 249                         /* it wasn't found! add it */
 250                         DEBUG(2,("Found new interface %s\n",
 251                                  inet_ntoa(iface->ip)));
 252                         subrec = make_normal_subnet(iface);
 253                         if (subrec) register_my_workgroup_one_subnet(subrec);
 254                 }
 255         }
 256
 257         /* find any interfaces that need deleting */
 258         for (subrec=subnetlist; subrec; subrec=subrec->next) {
 259                 for (n=iface_count() - 1; n >= 0; n--) {
 260                         struct interface *iface = get_interface(n);
 261                         if (ip_equal(iface->ip, subrec->myip) &&
 262                             ip_equal(iface->nmask, subrec->mask_ip)) break;
 263                 }
 264                 if (n == -1) {
 265                         /* oops, an interface has disapeared. This is
 266                          tricky, we don't dare actually free the
 267                          interface as it could be being used, so
 268                          instead we just wear the memory leak and
 269                          remove it from the list of interfaces without
 270                          freeing it */
 271                         DEBUG(2,("Deleting dead interface %s\n",
 272                                  inet_ntoa(subrec->myip)));
 273                         close_subnet(subrec);
 274                 }
 275         }
 276
 277         rescan_listen_set = True;
 278
 279         /* We need to shutdown if there are no subnets... */
 280         if (FIRST_SUBNET == NULL) {
 281                 DEBUG(0,("reload_interfaces: No subnets to listen to. Shutting down...\n"));
 282                 return True;
 283         }
 284         return False;
 285 }
 286
 287 /**************************************************************************** **
 288  Reload the services file.
 289  **************************************************************************** */
 290
 291 static BOOL reload_nmbd_services(BOOL test)
 292 {
 293         BOOL ret;
 294
 295         set_remote_machine_name("nmbd");
 296
 297         if ( lp_loaded() ) {
 298                 pstring fname;
 299                 pstrcpy( fname,lp_configfile());
 300                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
 301                         pstrcpy(dyn_CONFIGFILE,fname);
 302                         test = False;
 303                 }
 304         }
 305
 306         if ( test && !lp_file_list_changed() )
 307                 return(True);
 308
 309         ret = lp_load( dyn_CONFIGFILE, True , False, False);
 310
 311         /* perhaps the config filename is now set */
 312         if ( !test ) {
 313                 DEBUG( 3, ( "services not loaded\n" ) );
 314                 reload_nmbd_services( True );
 315         }
 316
 317         return(ret);
 318 }
 319
 320 /**************************************************************************** **
 321  The main select loop.
 322  **************************************************************************** */
 323
 324 static void process(void)
 325 {
 326         BOOL run_election;
 327
 328         while( True ) {
 329                 time_t t = time(NULL);
 330
 331                 /* Check for internal messages */
 332
 333                 message_dispatch();
 334
 335                 /*
 336                  * Check all broadcast subnets to see if
 337                  * we need to run an election on any of them.
 338                  * (nmbd_elections.c)
 339                  */
 340
 341                 run_election = check_elections();
 342
 343                 /*
 344                  * Read incoming UDP packets.
 345                  * (nmbd_packets.c)
 346                  */
 347
 348                 if(listen_for_packets(run_election))
 349                         return;
 350
 351                 /*
 352                  * Handle termination inband.
 353                  */
 354
 355                 if (got_sig_term) {
 356                         got_sig_term = 0;
 357                         terminate();
 358                 }
 359
 360                 /*
 361                  * Process all incoming packets
 362                  * read above. This calls the success and
 363                  * failure functions registered when response
 364                  * packets arrrive, and also deals with request
 365                  * packets from other sources.
 366                  * (nmbd_packets.c)
 367                  */
 368
 369                 run_packet_queue();
 370
 371                 /*
 372                  * Run any elections - initiate becoming
 373                  * a local master browser if we have won.
 374                  * (nmbd_elections.c)
 375                  */
 376
 377                 run_elections(t);
 378
 379                 /*
 380                  * Send out any broadcast announcements
 381                  * of our server names. This also announces
 382                  * the workgroup name if we are a local
 383                  * master browser.
 384                  * (nmbd_sendannounce.c)
 385                  */
 386
 387                 announce_my_server_names(t);
 388
 389                 /*
 390                  * Send out any LanMan broadcast announcements
 391                  * of our server names.
 392                  * (nmbd_sendannounce.c)
 393                  */
 394
 395                 announce_my_lm_server_names(t);
 396
 397                 /*
 398                  * If we are a local master browser, periodically
 399                  * announce ourselves to the domain master browser.
 400                  * This also deals with syncronising the domain master
 401                  * browser server lists with ourselves as a local
 402                  * master browser.
 403                  * (nmbd_sendannounce.c)
 404                  */
 405
 406                 announce_myself_to_domain_master_browser(t);
 407
 408                 /*
 409                  * Fullfill any remote announce requests.
 410                  * (nmbd_sendannounce.c)
 411                  */
 412
 413                 announce_remote(t);
 414
 415                 /*
 416                  * Fullfill any remote browse sync announce requests.
 417                  * (nmbd_sendannounce.c)
 418                  */
 419
 420                 browse_sync_remote(t);
 421
 422                 /*
 423                  * Scan the broadcast subnets, and WINS client
 424                  * namelists and refresh any that need refreshing.
 425                  * (nmbd_mynames.c)
 426                  */
 427
 428                 refresh_my_names(t);
 429
 430                 /*
 431                  * Scan the subnet namelists and server lists and
 432                  * expire thos that have timed out.
 433                  * (nmbd.c)
 434                  */
 435
 436                 expire_names_and_servers(t);
 437
 438                 /*
 439                  * Write out a snapshot of our current browse list into
 440                  * the browse.dat file. This is used by smbd to service
 441                  * incoming NetServerEnum calls - used to synchronise
 442                  * browse lists over subnets.
 443                  * (nmbd_serverlistdb.c)
 444                  */
 445
 446                 write_browse_list(t, False);
 447
 448                 /*
 449                  * If we are a domain master browser, we have a list of
 450                  * local master browsers we should synchronise browse
 451                  * lists with (these are added by an incoming local
 452                  * master browser announcement packet). Expire any of
 453                  * these that are no longer current, and pull the server
 454                  * lists from each of these known local master browsers.
 455                  * (nmbd_browsesync.c)
 456                  */
 457
 458                 dmb_expire_and_sync_browser_lists(t);
 459
 460                 /*
 461                  * Check that there is a local master browser for our
 462                  * workgroup for all our broadcast subnets. If one
 463                  * is not found, start an election (which we ourselves
 464                  * may or may not participate in, depending on the
 465                  * setting of the 'local master' parameter.
 466                  * (nmbd_elections.c)
 467                  */
 468
 469                 check_master_browser_exists(t);
 470
 471                 /*
 472                  * If we are configured as a logon server, attempt to
 473                  * register the special NetBIOS names to become such
 474                  * (WORKGROUP<1c> name) on all broadcast subnets and
 475                  * with the WINS server (if used). If we are configured
 476                  * to become a domain master browser, attempt to register
 477                  * the special NetBIOS name (WORKGROUP<1b> name) to
 478                  * become such.
 479                  * (nmbd_become_dmb.c)
 480                  */
 481
 482                 add_domain_names(t);
 483
 484                 /*
 485                  * If we are a WINS server, do any timer dependent
 486                  * processing required.
 487                  * (nmbd_winsserver.c)
 488                  */
 489
 490                 initiate_wins_processing(t);
 491
 492                 /*
 493                  * If we are a domain master browser, attempt to contact the
 494                  * WINS server to get a list of all known WORKGROUPS/DOMAINS.
 495                  * This will only work to a Samba WINS server.
 496                  * (nmbd_browsesync.c)
 497                  */
 498
 499                 if (lp_enhanced_browsing())
 500                         collect_all_workgroup_names_from_wins_server(t);
 501
 502                 /*
 503                  * Go through the response record queue and time out or re-transmit
 504                  * and expired entries.
 505                  * (nmbd_packets.c)
 506                  */
 507
 508                 retransmit_or_expire_response_records(t);
 509
 510                 /*
 511                  * check to see if any remote browse sync child processes have completed
 512                  */
 513
 514                 sync_check_completion();
 515
 516                 /*
 517                  * regularly sync with any other DMBs we know about
 518                  */
 519
 520                 if (lp_enhanced_browsing())
 521                         sync_all_dmbs(t);
 522
 523                 /*
 524                  * clear the unexpected packet queue
 525                  */
 526
 527                 clear_unexpected(t);
 528
 529                 /*
 530                  * Reload the services file if we got a sighup.
 531                  */
 532
 533                 if(reload_after_sighup) {
 534                         DEBUG( 0, ( "Got SIGHUP dumping debug info.\n" ) );
 535                         write_browse_list( 0, True );
 536                         dump_all_namelists();
 537                         reload_nmbd_services( True );
 538                         reopen_logs();
 539                         if(reload_interfaces(0))
 540                                 return;
 541                         reload_after_sighup = 0;
 542                 }
 543
 544                 /* check for new network interfaces */
 545
 546                 if(reload_interfaces(t))
 547                         return;
 548
 549                 /* free up temp memory */
 550                         lp_talloc_free();
 551         }
 552 }
 553
 554 /**************************************************************************** **
 555  Open the socket communication.
 556  **************************************************************************** */
 557
 558 static BOOL open_sockets(BOOL isdaemon, int port)
 559 {
 560         /*
 561          * The sockets opened here will be used to receive broadcast
 562          * packets *only*. Interface specific sockets are opened in
 563          * make_subnet() in namedbsubnet.c. Thus we bind to the
 564          * address "0.0.0.0". The parameter 'socket address' is
 565          * now deprecated.
 566          */
 567
 568         if ( isdaemon )
 569                 ClientNMB = open_socket_in(SOCK_DGRAM, port,0,0,True);
 570         else
 571                 ClientNMB = 0;
 572
 573         ClientDGRAM = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3,0,True);
 574
 575         if ( ClientNMB == -1 )
 576                 return( False );
 577
 578         /* we are never interested in SIGPIPE */
 579         BlockSignals(True,SIGPIPE);
 580
 581         set_socket_options( ClientNMB,   "SO_BROADCAST" );
 582         set_socket_options( ClientDGRAM, "SO_BROADCAST" );
 583
 584         DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
 585         return( True );
 586 }
 587
 588 /**************************************************************************** **
 589  main program
 590  **************************************************************************** */
 591  int main(int argc, const char *argv[])
 592 {
 593         static BOOL opt_interactive = False;
 594         poptContext pc;
 595         struct poptOption long_options[] = {
 596         POPT_AUTOHELP
 597         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon(default)" },
 598         {"interactive", 'i', POPT_ARG_VAL, &opt_interactive, True, "Run interactive (not a daemon)" },
 599         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 600         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 601         {"hosts", 'H', POPT_ARG_STRING, dyn_LMHOSTSFILE, 'H', "Load a netbios hosts file"},
 602         {"port", 'p', POPT_ARG_INT, &global_nmb_port, NMB_PORT, "Listen on the specified port" },
 603         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_debug },
 604         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_configfile },
 605         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_socket_options },
 606         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_version },
 607         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_netbios_name },
 608         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_log_base },
 609         { NULL }
 610         };
 611         int opt;
 612         pstring logfile;
 613
 614   global_nmb_port = NMB_PORT;
 615   global_in_nmbd = True;
 616
 617   StartupTime = time(NULL);
 618
 619   sys_srandom(time(NULL) ^ sys_getpid());
 620
 621   slprintf(logfile, sizeof(logfile)-1, "%s/log.nmbd", dyn_LOGFILEBASE);
 622   lp_set_logfile(logfile);
 623
 624   fault_setup((void (*)(void *))fault_continue );
 625
 626   /* POSIX demands that signals are inherited. If the invoking process has
 627    * these signals masked, we will have problems, as we won't recieve them. */
 628   BlockSignals(False, SIGHUP);
 629   BlockSignals(False, SIGUSR1);
 630   BlockSignals(False, SIGTERM);
 631
 632   CatchSignal( SIGHUP,  SIGNAL_CAST sig_hup );
 633   CatchSignal( SIGTERM, SIGNAL_CAST sig_term );
 634
 635 #if defined(SIGFPE)
 636   /* we are never interested in SIGFPE */
 637   BlockSignals(True,SIGFPE);
 638 #endif
 639
 640   /* We no longer use USR2... */
 641 #if defined(SIGUSR2)
 642   BlockSignals(True, SIGUSR2);
 643 #endif
 644   pc = poptGetContext("nmbd", argc, argv, long_options, 0);
 645
 646   while((opt = poptGetNextOpt(pc)) != -1)
 647     { }
 648
 649   poptFreeContext(pc);
 650
 651   if ( opt_interactive ) {
 652     Fork = False;
 653     log_stdout = True;
 654   }
 655
 656   if ( log_stdout && Fork ) {
 657     DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 658     exit(1);
 659   }
 660
 661   setup_logging( argv[0], log_stdout );
 662
 663   reopen_logs();
 664
 665   DEBUG( 0, ( "Netbios nameserver version %s started.\n", VERSION ) );
 666   DEBUGADD( 0, ( "Copyright Andrew Tridgell and the Samba Team 1994-2002\n" ) );
 667
 668   if ( !reload_nmbd_services(False) )
 669     return(-1);
 670
 671   if(!init_names())
 672     return -1;
 673
 674   reload_nmbd_services( True );
 675
 676   if (strequal(lp_workgroup(),"*"))
 677   {
 678     DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
 679     exit(1);
 680   }
 681
 682   set_samba_nb_type();
 683
 684   if (!is_daemon && !is_a_socket(0))
 685   {
 686     DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 687     is_daemon = True;
 688   }
 689
 690   if (is_daemon && !opt_interactive)
 691   {
 692     DEBUG( 2, ( "Becoming a daemon.\n" ) );
 693     become_daemon(Fork);
 694   }
 695
 696 #if HAVE_SETPGID
 697   /*
 698    * If we're interactive we want to set our own process group for
 699    * signal management.
 700    */
 701   if (opt_interactive)
 702     setpgid( (pid_t)0, (pid_t)0 );
 703 #endif
 704
 705 #ifndef SYNC_DNS
 706   /* Setup the async dns. We do it here so it doesn't have all the other
 707      stuff initialised and thus chewing memory and sockets */
 708   if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
 709           start_async_dns();
 710   }
 711 #endif
 712
 713   if (!directory_exist(lp_lockdir(), NULL)) {
 714           mkdir(lp_lockdir(), 0755);
 715   }
 716
 717   pidfile_create("nmbd");
 718   message_init();
 719   message_register(MSG_FORCE_ELECTION, nmbd_message_election);
 720   message_register(MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
 721   message_register(MSG_SHUTDOWN, nmbd_terminate);
 722   message_register(MSG_REQ_TALLOC_USAGE, return_all_talloc_info);
 723
 724   DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
 725
 726   if ( !open_sockets( is_daemon, global_nmb_port ) ) {
 727     kill_async_dns_child();
 728     return 1;
 729   }
 730
 731   /* Determine all the IP addresses we have. */
 732   load_interfaces();
 733
 734   /* Create an nmbd subnet record for each of the above. */
 735   if( False == create_subnets() )
 736   {
 737     DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
 738     kill_async_dns_child();
 739     exit(1);
 740   }
 741
 742   /* Load in any static local names. */
 743   load_lmhosts_file(dyn_LMHOSTSFILE);
 744   DEBUG(3,("Loaded hosts file %s\n", dyn_LMHOSTSFILE));
 745
 746   /* If we are acting as a WINS server, initialise data structures. */
 747   if( !initialise_wins() )
 748   {
 749     DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
 750     kill_async_dns_child();
 751     exit(1);
 752   }
 753
 754   /*
 755    * Register nmbd primary workgroup and nmbd names on all
 756    * the broadcast subnets, and on the WINS server (if specified).
 757    * Also initiate the startup of our primary workgroup (start
 758    * elections if we are setup as being able to be a local
 759    * master browser.
 760    */
 761
 762   if( False == register_my_workgroup_and_names() )
 763   {
 764     DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
 765     kill_async_dns_child();
 766     exit(1);
 767   }
 768
 769   /* We can only take signals in the select. */
 770   BlockSignals( True, SIGTERM );
 771
 772   process();
 773
 774   if (dbf)
 775     x_fclose(dbf);
 776   kill_async_dns_child();
 777   return(0);
 778 }