source/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
   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 #include "includes.h"
  24
  25 static int am_parent = 1;
  26
  27 /* the last message the was processed */
  28 int last_message = -1;
  29
  30 /* a useful macro to debug the last message processed */
  31 #define LAST_MESSAGE() smb_fn_name(last_message)
  32
  33 extern pstring user_socket_options;
  34 extern SIG_ATOMIC_T got_sig_term;
  35 extern SIG_ATOMIC_T reload_after_sighup;
  36
  37 #ifdef WITH_DFS
  38 extern int dcelogin_atmost_once;
  39 #endif /* WITH_DFS */
  40
  41 /* really we should have a top level context structure that has the
  42    client file descriptor as an element. That would require a major rewrite :(
  43
  44    the following 2 functions are an alternative - they make the file
  45    descriptor private to smbd
  46  */
  47 static int server_fd = -1;
  48
  49 int smbd_server_fd(void)
  50 {
  51         return server_fd;
  52 }
  53
  54 static void smbd_set_server_fd(int fd)
  55 {
  56         server_fd = fd;
  57         client_setfd(fd);
  58 }
  59
  60 /****************************************************************************
  61  Terminate signal.
  62 ****************************************************************************/
  63
  64 static void sig_term(void)
  65 {
  66         got_sig_term = 1;
  67         sys_select_signal();
  68 }
  69
  70 /****************************************************************************
  71  Catch a sighup.
  72 ****************************************************************************/
  73
  74 static void sig_hup(int sig)
  75 {
  76         reload_after_sighup = 1;
  77         sys_select_signal();
  78 }
  79
  80 /****************************************************************************
  81   Send a SIGTERM to our process group.
  82 *****************************************************************************/
  83
  84 static void  killkids(void)
  85 {
  86         if(am_parent) kill(0,SIGTERM);
  87 }
  88
  89 /****************************************************************************
  90  Process a sam sync message - not sure whether to do this here or
  91  somewhere else.
  92 ****************************************************************************/
  93
  94 static void msg_sam_sync(int UNUSED(msg_type), pid_t UNUSED(pid),
  95                          void *UNUSED(buf), size_t UNUSED(len))
  96 {
  97         DEBUG(10, ("** sam sync message received, ignoring\n"));
  98 }
  99
 100 /****************************************************************************
 101  Process a sam sync replicate message - not sure whether to do this here or
 102  somewhere else.
 103 ****************************************************************************/
 104
 105 static void msg_sam_repl(int msg_type, pid_t pid, void *buf, size_t len)
 106 {
 107         uint32 low_serial;
 108
 109         if (len != sizeof(uint32))
 110                 return;
 111
 112         low_serial = *((uint32 *)buf);
 113
 114         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 115                   low_serial));
 116 }
 117
 118 /****************************************************************************
 119  Open the socket communication - inetd.
 120 ****************************************************************************/
 121
 122 static BOOL open_sockets_inetd(void)
 123 {
 124         /* Started from inetd. fd 0 is the socket. */
 125         /* We will abort gracefully when the client or remote system
 126            goes away */
 127         smbd_set_server_fd(dup(0));
 128
 129         /* close our standard file descriptors */
 130         close_low_fds(False); /* Don't close stderr */
 131
 132         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 133         set_socket_options(smbd_server_fd(), user_socket_options);
 134
 135         return True;
 136 }
 137
 138 static void msg_exit_server(int msg_type, pid_t src, void *buf, size_t len)
 139 {
 140         exit_server("Got a SHUTDOWN message");
 141 }
 142
 143
 144 /****************************************************************************
 145  Have we reached the process limit ?
 146 ****************************************************************************/
 147
 148 static BOOL allowable_number_of_smbd_processes(void)
 149 {
 150         int max_processes = lp_max_smbd_processes();
 151
 152         if (!max_processes)
 153                 return True;
 154
 155         {
 156                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 157                 int32 val;
 158                 if (!tdb) {
 159                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 160                         return False;
 161                 }
 162
 163                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 164                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 165                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 166                                 tdb_errorstr(tdb) ));
 167                         return False;
 168                 }
 169                 if (val > max_processes) {
 170                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 171                                 val, max_processes ));
 172                         return False;
 173                 }
 174         }
 175         return True;
 176 }
 177
 178 /****************************************************************************
 179  Open the socket communication.
 180 ****************************************************************************/
 181
 182 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 183 {
 184         int num_interfaces = iface_count();
 185         int num_sockets = 0;
 186         int fd_listenset[FD_SETSIZE];
 187         fd_set listen_set;
 188         int s;
 189         int i;
 190         char *ports;
 191
 192         if (!is_daemon) {
 193                 return open_sockets_inetd();
 194         }
 195
 196
 197 #ifdef HAVE_ATEXIT
 198         {
 199                 static int atexit_set;
 200                 if(atexit_set == 0) {
 201                         atexit_set=1;
 202                         atexit(killkids);
 203                 }
 204         }
 205 #endif
 206
 207         /* Stop zombies */
 208         CatchChild();
 209
 210         FD_ZERO(&listen_set);
 211
 212         /* use a reasonable default set of ports - listing on 445 and 139 */
 213         if (!smb_ports) {
 214                 ports = lp_smb_ports();
 215                 if (!ports || !*ports) {
 216                         ports = smb_xstrdup(SMB_PORTS);
 217                 } else {
 218                         ports = smb_xstrdup(ports);
 219                 }
 220         } else {
 221                 ports = smb_xstrdup(smb_ports);
 222         }
 223
 224         if (lp_interfaces() && lp_bind_interfaces_only()) {
 225                 /* We have been given an interfaces line, and been
 226                    told to only bind to those interfaces. Create a
 227                    socket per interface and bind to only these.
 228                 */
 229
 230                 /* Now open a listen socket for each of the
 231                    interfaces. */
 232                 for(i = 0; i < num_interfaces; i++) {
 233                         struct in_addr *ifip = iface_n_ip(i);
 234                         fstring tok;
 235                         const char *ptr;
 236
 237                         if(ifip == NULL) {
 238                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 239                                 continue;
 240                         }
 241
 242                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 243                                 unsigned port = atoi(tok);
 244                                 if (port == 0) continue;
 245                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 246                                 if(s == -1)
 247                                         return False;
 248
 249                                 /* ready to listen */
 250                                 set_socket_options(s,"SO_KEEPALIVE");
 251                                 set_socket_options(s,user_socket_options);
 252
 253                                 /* Set server socket to non-blocking for the accept. */
 254                                 set_blocking(s,False);
 255
 256                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 257                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 258                                         close(s);
 259                                         return False;
 260                                 }
 261                                 FD_SET(s,&listen_set);
 262
 263                                 num_sockets++;
 264                                 if (num_sockets >= FD_SETSIZE) {
 265                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 266                                         return False;
 267                                 }
 268                         }
 269                 }
 270         } else {
 271                 /* Just bind to 0.0.0.0 - accept connections
 272                    from anywhere. */
 273
 274                 fstring tok;
 275                 const char *ptr;
 276
 277                 num_interfaces = 1;
 278
 279                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 280                         unsigned port = atoi(tok);
 281                         if (port == 0) continue;
 282                         /* open an incoming socket */
 283                         s = open_socket_in(SOCK_STREAM, port, 0,
 284                                            interpret_addr(lp_socket_address()),True);
 285                         if (s == -1)
 286                                 return(False);
 287
 288                         /* ready to listen */
 289                         set_socket_options(s,"SO_KEEPALIVE");
 290                         set_socket_options(s,user_socket_options);
 291
 292                         /* Set server socket to non-blocking for the accept. */
 293                         set_blocking(s,False);
 294
 295                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 296                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 297                                          strerror(errno)));
 298                                 close(s);
 299                                 return False;
 300                         }
 301
 302                         fd_listenset[num_sockets] = s;
 303                         FD_SET(s,&listen_set);
 304
 305                         num_sockets++;
 306
 307                         if (num_sockets >= FD_SETSIZE) {
 308                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 309                                 return False;
 310                         }
 311                 }
 312         }
 313
 314         SAFE_FREE(ports);
 315
 316         /* Listen to messages */
 317
 318         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 319         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 320         message_register(MSG_SHUTDOWN, msg_exit_server);
 321
 322         /* now accept incoming connections - forking a new process
 323            for each incoming connection */
 324         DEBUG(2,("waiting for a connection\n"));
 325         while (1) {
 326                 fd_set lfds;
 327                 int num;
 328
 329                 /* Free up temporary memory from the main smbd. */
 330                 lp_talloc_free();
 331
 332                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 333                 message_dispatch();
 334
 335                 memcpy((char *)&lfds, (char *)&listen_set,
 336                        sizeof(listen_set));
 337
 338                 num = sys_select(FD_SETSIZE,&lfds,NULL,NULL,NULL);
 339
 340                 if (num == -1 && errno == EINTR) {
 341                         if (got_sig_term) {
 342                                 exit_server("Caught TERM signal");
 343                         }
 344
 345                         /* check for sighup processing */
 346                         if (reload_after_sighup) {
 347                                 change_to_root_user();
 348                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 349                                 reload_services(False);
 350                                 reload_after_sighup = 0;
 351                         }
 352
 353                         continue;
 354                 }
 355
 356                 /* check if we need to reload services */
 357                 check_reload(time(NULL));
 358
 359                 /* Find the sockets that are read-ready -
 360                    accept on these. */
 361                 for( ; num > 0; num--) {
 362                         struct sockaddr addr;
 363                         socklen_t in_addrlen = sizeof(addr);
 364
 365                         s = -1;
 366                         for(i = 0; i < num_sockets; i++) {
 367                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 368                                         s = fd_listenset[i];
 369                                         /* Clear this so we don't look
 370                                            at it again. */
 371                                         FD_CLR(fd_listenset[i],&lfds);
 372                                         break;
 373                                 }
 374                         }
 375
 376                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 377
 378                         if (smbd_server_fd() == -1 && errno == EINTR)
 379                                 continue;
 380
 381                         if (smbd_server_fd() == -1) {
 382                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 383                                          strerror(errno)));
 384                                 continue;
 385                         }
 386
 387                         /* Ensure child is set to blocking mode */
 388                         set_blocking(smbd_server_fd(),True);
 389
 390                         if (smbd_server_fd() != -1 && interactive)
 391                                 return True;
 392
 393                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 394                                 /* Child code ... */
 395
 396                                 /* close the listening socket(s) */
 397                                 for(i = 0; i < num_sockets; i++)
 398                                         close(fd_listenset[i]);
 399
 400                                 /* close our standard file
 401                                    descriptors */
 402                                 close_low_fds(False);
 403                                 am_parent = 0;
 404
 405                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 406                                 set_socket_options(smbd_server_fd(),user_socket_options);
 407
 408                                 /* this is needed so that we get decent entries
 409                                    in smbstatus for port 445 connects */
 410                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 411
 412                                 /* Reset global variables in util.c so
 413                                    that client substitutions will be
 414                                    done correctly in the process.  */
 415                                 reset_globals_after_fork();
 416
 417                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 418                                 if (tdb_reopen_all() == -1) {
 419                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 420                                         smb_panic("tdb_reopen_all failed.");
 421                                 }
 422
 423                                 return True;
 424                         }
 425                         /* The parent doesn't need this socket */
 426                         close(smbd_server_fd());
 427
 428                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 429                                 Clear the closed fd info out of server_fd --
 430                                 and more importantly, out of client_fd in
 431                                 util_sock.c, to avoid a possible
 432                                 getpeername failure if we reopen the logs
 433                                 and use %I in the filename.
 434                         */
 435
 436                         smbd_set_server_fd(-1);
 437
 438                         /* Force parent to check log size after
 439                          * spawning child.  Fix from
 440                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 441                          * parent smbd will log to logserver.smb.  It
 442                          * writes only two messages for each child
 443                          * started/finished. But each child writes,
 444                          * say, 50 messages also in logserver.smb,
 445                          * begining with the debug_count of the
 446                          * parent, before the child opens its own log
 447                          * file logserver.client. In a worst case
 448                          * scenario the size of logserver.smb would be
 449                          * checked after about 50*50=2500 messages
 450                          * (ca. 100kb).
 451                          * */
 452                         force_check_log_size();
 453
 454                 } /* end for num */
 455         } /* end while 1 */
 456
 457 /* NOTREACHED   return True; */
 458 }
 459
 460 /****************************************************************************
 461  Reload the services file.
 462 **************************************************************************/
 463
 464 BOOL reload_services(BOOL test)
 465 {
 466         BOOL ret;
 467
 468         if (lp_loaded()) {
 469                 pstring fname;
 470                 pstrcpy(fname,lp_configfile());
 471                 if (file_exist(fname, NULL) &&
 472                     !strcsequal(fname, dyn_CONFIGFILE)) {
 473                         pstrcpy(dyn_CONFIGFILE, fname);
 474                         test = False;
 475                 }
 476         }
 477
 478         reopen_logs();
 479
 480         if (test && !lp_file_list_changed())
 481                 return(True);
 482
 483         lp_killunused(conn_snum_used);
 484
 485         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 486
 487         load_printers();
 488
 489         /* perhaps the config filename is now set */
 490         if (!test)
 491                 reload_services(True);
 492
 493         reopen_logs();
 494
 495         load_interfaces();
 496
 497         {
 498                 if (smbd_server_fd() != -1) {
 499                         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 500                         set_socket_options(smbd_server_fd(), user_socket_options);
 501                 }
 502         }
 503
 504         mangle_reset_cache();
 505         reset_stat_cache();
 506
 507         /* this forces service parameters to be flushed */
 508         set_current_service(NULL,True);
 509
 510         return(ret);
 511 }
 512
 513
 514 #if DUMP_CORE
 515 /*******************************************************************
 516 prepare to dump a core file - carefully!
 517 ********************************************************************/
 518 static BOOL dump_core(void)
 519 {
 520         char *p;
 521         pstring dname;
 522
 523         pstrcpy(dname,lp_logfile());
 524         if ((p=strrchr_m(dname,'/'))) *p=0;
 525         pstrcat(dname,"/corefiles");
 526         mkdir(dname,0700);
 527         sys_chown(dname,getuid(),getgid());
 528         chmod(dname,0700);
 529         if (chdir(dname)) return(False);
 530         umask(~(0700));
 531
 532 #ifdef HAVE_GETRLIMIT
 533 #ifdef RLIMIT_CORE
 534         {
 535                 struct rlimit rlp;
 536                 getrlimit(RLIMIT_CORE, &rlp);
 537                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 538                 setrlimit(RLIMIT_CORE, &rlp);
 539                 getrlimit(RLIMIT_CORE, &rlp);
 540                 DEBUG(3,("Core limits now %d %d\n",
 541                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 542         }
 543 #endif
 544 #endif
 545
 546
 547         DEBUG(0,("Dumping core in %s\n", dname));
 548         /* Ensure we don't have a signal handler for abort. */
 549 #ifdef SIGABRT
 550         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 551 #endif
 552         abort();
 553         return(True);
 554 }
 555 #endif
 556
 557 /****************************************************************************
 558  Exit the server.
 559 ****************************************************************************/
 560
 561 void exit_server(const char *reason)
 562 {
 563         static int firsttime=1;
 564         extern char *last_inbuf;
 565         extern struct auth_context *negprot_global_auth_context;
 566
 567         if (!firsttime)
 568                 exit(0);
 569         firsttime = 0;
 570
 571         change_to_root_user();
 572         DEBUG(2,("Closing connections\n"));
 573
 574         if (negprot_global_auth_context) {
 575                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 576         }
 577
 578         conn_close_all();
 579
 580         invalidate_all_vuids();
 581
 582         print_notify_send_messages(3); /* 3 second timeout. */
 583
 584         /* run all registered exit events */
 585         smb_run_exit_events();
 586
 587         /* delete our entry in the connections database. */
 588         yield_connection(NULL,"");
 589
 590         respond_to_all_remaining_local_messages();
 591         decrement_smbd_process_count();
 592
 593 #ifdef WITH_DFS
 594         if (dcelogin_atmost_once) {
 595                 dfs_unlogin();
 596         }
 597 #endif
 598
 599         if (!reason) {
 600                 int oldlevel = DEBUGLEVEL;
 601                 DEBUGLEVEL = 10;
 602                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 603                 if (last_inbuf)
 604                         show_msg(last_inbuf);
 605                 DEBUGLEVEL = oldlevel;
 606                 DEBUG(0,("===============================================================\n"));
 607 #if DUMP_CORE
 608                 if (dump_core()) return;
 609 #endif
 610         }
 611
 612         locking_end();
 613         printing_end();
 614
 615         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 616         exit(0);
 617 }
 618
 619 /****************************************************************************
 620  Initialise connect, service and file structs.
 621 ****************************************************************************/
 622
 623 static BOOL init_structs(void )
 624 {
 625         /*
 626          * Set the machine NETBIOS name if not already
 627          * set from the config file.
 628          */
 629
 630         if (!init_names())
 631                 return False;
 632
 633         conn_init();
 634
 635         file_init();
 636
 637         /* for RPC pipes */
 638         init_rpc_pipe_hnd();
 639
 640         init_dptrs();
 641
 642         secrets_init();
 643
 644         return True;
 645 }
 646
 647 /****************************************************************************
 648  main program.
 649 ****************************************************************************/
 650
 651 /* Declare prototype for build_options() to avoid having to run it through
 652    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 653    prototype generation system is too complicated. */
 654
 655 void build_options(BOOL screen);
 656
 657  int main(int argc,const char *argv[])
 658 {
 659         /* shall I run as a daemon */
 660         static BOOL is_daemon = False;
 661         static BOOL interactive = False;
 662         static BOOL Fork = True;
 663         static BOOL log_stdout = False;
 664         static char *ports = NULL;
 665         int opt;
 666         poptContext pc;
 667
 668         struct poptOption long_options[] = {
 669                 POPT_AUTOHELP
 670         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 671         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 672         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 673         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 674         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 675         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 676         POPT_COMMON_SAMBA
 677         { NULL }
 678         };
 679
 680 #ifdef HAVE_SET_AUTH_PARAMETERS
 681         set_auth_parameters(argc,argv);
 682 #endif
 683
 684         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 685
 686         while((opt = poptGetNextOpt(pc)) != -1) {
 687                 switch (opt)  {
 688                 case 'b':
 689                         build_options(True); /* Display output to screen as well as debug */
 690                         exit(0);
 691                         break;
 692                 }
 693         }
 694
 695         poptFreeContext(pc);
 696
 697 #ifdef HAVE_SETLUID
 698         /* needed for SecureWare on SCO */
 699         setluid(0);
 700 #endif
 701
 702         sec_init();
 703
 704         load_case_tables();
 705
 706         set_remote_machine_name("smbd", False);
 707
 708         if (interactive) {
 709                 Fork = False;
 710                 log_stdout = True;
 711         }
 712
 713         if (log_stdout && Fork) {
 714                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 715                 exit(1);
 716         }
 717
 718         setup_logging(argv[0],log_stdout);
 719
 720         /* we want to re-seed early to prevent time delays causing
 721            client problems at a later date. (tridge) */
 722         generate_random_buffer(NULL, 0, False);
 723
 724         /* make absolutely sure we run as root - to handle cases where people
 725            are crazy enough to have it setuid */
 726
 727         gain_root_privilege();
 728         gain_root_group_privilege();
 729
 730         fault_setup((void (*)(void *))exit_server);
 731         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 732         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 733
 734         /* we are never interested in SIGPIPE */
 735         BlockSignals(True,SIGPIPE);
 736
 737 #if defined(SIGFPE)
 738         /* we are never interested in SIGFPE */
 739         BlockSignals(True,SIGFPE);
 740 #endif
 741
 742 #if defined(SIGUSR2)
 743         /* We are no longer interested in USR2 */
 744         BlockSignals(True,SIGUSR2);
 745 #endif
 746
 747         /* POSIX demands that signals are inherited. If the invoking process has
 748          * these signals masked, we will have problems, as we won't recieve them. */
 749         BlockSignals(False, SIGHUP);
 750         BlockSignals(False, SIGUSR1);
 751         BlockSignals(False, SIGTERM);
 752
 753         /* we want total control over the permissions on created files,
 754            so set our umask to 0 */
 755         umask(0);
 756
 757         init_sec_ctx();
 758
 759         reopen_logs();
 760
 761         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 762         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2004\n"));
 763
 764         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 765                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 766
 767         /* Output the build options to the debug log */
 768         build_options(False);
 769
 770         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 771                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 772                 exit(1);
 773         }
 774
 775         /*
 776          * Do this before reload_services.
 777          */
 778
 779         if (!reload_services(False))
 780                 return(-1);
 781
 782         init_structs();
 783
 784 #ifdef WITH_PROFILE
 785         if (!profile_setup(False)) {
 786                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 787                 return -1;
 788         }
 789 #endif
 790
 791         DEBUG(3,( "loaded services\n"));
 792
 793         if (!is_daemon && !is_a_socket(0)) {
 794                 if (!interactive)
 795                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 796
 797                 /*
 798                  * Setting is_daemon here prevents us from eventually calling
 799                  * the open_sockets_inetd()
 800                  */
 801
 802                 is_daemon = True;
 803         }
 804
 805         if (is_daemon && !interactive) {
 806                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 807                 become_daemon(Fork);
 808         }
 809
 810 #if HAVE_SETPGID
 811         /*
 812          * If we're interactive we want to set our own process group for
 813          * signal management.
 814          */
 815         if (interactive)
 816                 setpgid( (pid_t)0, (pid_t)0);
 817 #endif
 818
 819         if (!directory_exist(lp_lockdir(), NULL))
 820                 mkdir(lp_lockdir(), 0755);
 821
 822         if (is_daemon)
 823                 pidfile_create("smbd");
 824
 825         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 826         if (!message_init())
 827                 exit(1);
 828
 829         if (!session_init())
 830                 exit(1);
 831
 832         if (conn_tdb_ctx() == NULL)
 833                 exit(1);
 834
 835         if (!locking_init(0))
 836                 exit(1);
 837
 838         if (!share_info_db_init())
 839                 exit(1);
 840
 841         namecache_enable();
 842
 843         if (!init_registry())
 844                 exit(1);
 845
 846         if (!print_backend_init())
 847                 exit(1);
 848
 849         /* Setup the main smbd so that we can get messages. */
 850         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 851
 852         /* only start the background queue daemon if we are
 853            running as a daemon -- bad things will happen if
 854            smbd is launched via inetd and we fork a copy of
 855            ourselves here */
 856
 857         if ( is_daemon )
 858                 start_background_queue();
 859
 860         if (!open_sockets_smbd(is_daemon, interactive, ports))
 861                 exit(1);
 862
 863         /*
 864          * everything after this point is run after the fork()
 865          */
 866
 867         /* Initialise the password backed before the global_sam_sid
 868            to ensure that we fetch from ldap before we make a domain sid up */
 869
 870         if(!initialize_password_db(False))
 871                 exit(1);
 872
 873         if(!get_global_sam_sid()) {
 874                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 875                 exit(1);
 876         }
 877
 878         static_init_rpc;
 879
 880         init_modules();
 881
 882         /* possibly reload the services file. */
 883         reload_services(True);
 884
 885         if (!init_account_policy()) {
 886                 DEBUG(0,("Could not open account policy tdb.\n"));
 887                 exit(1);
 888         }
 889
 890         if (*lp_rootdir()) {
 891                 if (sys_chroot(lp_rootdir()) == 0)
 892                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 893         }
 894
 895         /* Setup oplocks */
 896         if (!init_oplocks())
 897                 exit(1);
 898
 899         /* Setup change notify */
 900         if (!init_change_notify())
 901                 exit(1);
 902
 903         /* re-initialise the timezone */
 904         TimeInit();
 905
 906         /* register our message handlers */
 907         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 908
 909         smbd_process();
 910
 911         namecache_shutdown();
 912         exit_server("normal exit");
 913         return(0);
 914 }