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
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern fstring global_myworkgroup;
  25 extern pstring global_myname;
  26
  27 int am_parent = 1;
  28
  29 /* the last message the was processed */
  30 int last_message = -1;
  31
  32 /* a useful macro to debug the last message processed */
  33 #define LAST_MESSAGE() smb_fn_name(last_message)
  34
  35 extern pstring user_socket_options;
  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 SIG_ATOMIC_T got_sig_term = 0;
  65
  66 static void sig_term(void)
  67 {
  68         got_sig_term = 1;
  69         sys_select_signal();
  70 }
  71
  72 /****************************************************************************
  73  Catch a sighup.
  74 ****************************************************************************/
  75
  76 SIG_ATOMIC_T reload_after_sighup = 0;
  77
  78 static void sig_hup(int sig)
  79 {
  80         reload_after_sighup = 1;
  81         sys_select_signal();
  82 }
  83
  84 /****************************************************************************
  85   Send a SIGTERM to our process group.
  86 *****************************************************************************/
  87
  88 static void  killkids(void)
  89 {
  90         if(am_parent) kill(0,SIGTERM);
  91 }
  92
  93 /****************************************************************************
  94  Process a sam sync message - not sure whether to do this here or
  95  somewhere else.
  96 ****************************************************************************/
  97
  98 static void msg_sam_sync(int UNUSED(msg_type), pid_t UNUSED(pid),
  99                          void *UNUSED(buf), size_t UNUSED(len))
 100 {
 101         DEBUG(10, ("** sam sync message received, ignoring\n"));
 102 }
 103
 104 /****************************************************************************
 105  Process a sam sync replicate message - not sure whether to do this here or
 106  somewhere else.
 107 ****************************************************************************/
 108
 109 static void msg_sam_repl(int msg_type, pid_t pid, void *buf, size_t len)
 110 {
 111         uint32 low_serial;
 112
 113         if (len != sizeof(uint32))
 114                 return;
 115
 116         low_serial = *((uint32 *)buf);
 117
 118         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 119                   low_serial));
 120 }
 121
 122 /****************************************************************************
 123  Open the socket communication - inetd.
 124 ****************************************************************************/
 125
 126 static BOOL open_sockets_inetd(void)
 127 {
 128         /* Started from inetd. fd 0 is the socket. */
 129         /* We will abort gracefully when the client or remote system
 130            goes away */
 131         smbd_set_server_fd(dup(0));
 132
 133         /* close our standard file descriptors */
 134         close_low_fds(False); /* Don't close stderr */
 135
 136         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 137         set_socket_options(smbd_server_fd(), user_socket_options);
 138
 139         return True;
 140 }
 141
 142 static void msg_exit_server(int msg_type, pid_t src, void *buf, size_t len)
 143 {
 144         exit_server("Got a SHUTDOWN message");
 145 }
 146
 147
 148 /****************************************************************************
 149  Open the socket communication.
 150 ****************************************************************************/
 151
 152 static BOOL open_sockets_smbd(BOOL is_daemon,const char *smb_ports)
 153 {
 154         int num_interfaces = iface_count();
 155         int num_sockets = 0;
 156         int fd_listenset[FD_SETSIZE];
 157         fd_set listen_set;
 158         int s;
 159         int i;
 160         char *ports;
 161
 162         if (!is_daemon) {
 163                 return open_sockets_inetd();
 164         }
 165
 166
 167 #ifdef HAVE_ATEXIT
 168         {
 169                 static int atexit_set;
 170                 if(atexit_set == 0) {
 171                         atexit_set=1;
 172                         atexit(killkids);
 173                 }
 174         }
 175 #endif
 176
 177         /* Stop zombies */
 178         CatchChild();
 179
 180         FD_ZERO(&listen_set);
 181
 182         /* use a reasonable default set of ports - listing on 445 and 139 */
 183         if (!smb_ports) {
 184                 ports = lp_smb_ports();
 185                 if (!ports || !*ports) {
 186                         ports = SMB_PORTS;
 187                 }
 188                 ports = strdup(ports);
 189         } else {
 190                 ports = strdup(smb_ports);
 191         }
 192
 193         if (lp_interfaces() && lp_bind_interfaces_only()) {
 194                 /* We have been given an interfaces line, and been
 195                    told to only bind to those interfaces. Create a
 196                    socket per interface and bind to only these.
 197                 */
 198
 199                 /* Now open a listen socket for each of the
 200                    interfaces. */
 201                 for(i = 0; i < num_interfaces; i++) {
 202                         struct in_addr *ifip = iface_n_ip(i);
 203                         fstring tok;
 204                         char *ptr;
 205
 206                         if(ifip == NULL) {
 207                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 208                                 continue;
 209                         }
 210
 211                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 212                                 unsigned port = atoi(tok);
 213                                 if (port == 0) continue;
 214                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 215                                 if(s == -1)
 216                                         return False;
 217
 218                                 /* ready to listen */
 219                                 set_socket_options(s,"SO_KEEPALIVE");
 220                                 set_socket_options(s,user_socket_options);
 221
 222                                 if (listen(s, 5) == -1) {
 223                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 224                                         close(s);
 225                                         return False;
 226                                 }
 227                                 FD_SET(s,&listen_set);
 228
 229                                 num_sockets++;
 230                                 if (num_sockets >= FD_SETSIZE) {
 231                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 232                                         return False;
 233                                 }
 234                         }
 235                 }
 236         } else {
 237                 /* Just bind to 0.0.0.0 - accept connections
 238                    from anywhere. */
 239
 240                 fstring tok;
 241                 char *ptr;
 242
 243                 num_interfaces = 1;
 244
 245                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 246                         unsigned port = atoi(tok);
 247                         if (port == 0) continue;
 248                         /* open an incoming socket */
 249                         s = open_socket_in(SOCK_STREAM, port, 0,
 250                                            interpret_addr(lp_socket_address()),True);
 251                         if (s == -1)
 252                                 return(False);
 253
 254                         /* ready to listen */
 255                         set_socket_options(s,"SO_KEEPALIVE");
 256                         set_socket_options(s,user_socket_options);
 257
 258                         if (listen(s, 5) == -1) {
 259                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 260                                          strerror(errno)));
 261                                 close(s);
 262                                 return False;
 263                         }
 264
 265                         fd_listenset[num_sockets] = s;
 266                         FD_SET(s,&listen_set);
 267
 268                         num_sockets++;
 269
 270                         if (num_sockets >= FD_SETSIZE) {
 271                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 272                                 return False;
 273                         }
 274                 }
 275         }
 276
 277         SAFE_FREE(ports);
 278
 279         /* Listen to messages */
 280
 281         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 282         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 283         message_register(MSG_SHUTDOWN, msg_exit_server);
 284
 285         /* now accept incoming connections - forking a new process
 286            for each incoming connection */
 287         DEBUG(2,("waiting for a connection\n"));
 288         while (1) {
 289                 fd_set lfds;
 290                 int num;
 291
 292                 /* Free up temporary memory from the main smbd. */
 293                 lp_talloc_free();
 294
 295                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 296                 message_dispatch();
 297
 298                 memcpy((char *)&lfds, (char *)&listen_set,
 299                        sizeof(listen_set));
 300
 301                 num = sys_select(FD_SETSIZE,&lfds,NULL,NULL,NULL);
 302
 303                 if (num == -1 && errno == EINTR) {
 304                         if (got_sig_term) {
 305                                 exit_server("Caught TERM signal");
 306                         }
 307
 308                         /* check for sighup processing */
 309                         if (reload_after_sighup) {
 310                                 change_to_root_user();
 311                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 312                                 reload_services(False);
 313                                 reload_after_sighup = 0;
 314                         }
 315
 316                         continue;
 317                 }
 318
 319                 /* check if we need to reload services */
 320                 check_reload(time(NULL));
 321
 322                 /* Find the sockets that are read-ready -
 323                    accept on these. */
 324                 for( ; num > 0; num--) {
 325                         struct sockaddr addr;
 326                         socklen_t in_addrlen = sizeof(addr);
 327
 328                         s = -1;
 329                         for(i = 0; i < num_sockets; i++) {
 330                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 331                                         s = fd_listenset[i];
 332                                         /* Clear this so we don't look
 333                                            at it again. */
 334                                         FD_CLR(fd_listenset[i],&lfds);
 335                                         break;
 336                                 }
 337                         }
 338
 339                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 340
 341                         if (smbd_server_fd() == -1 && errno == EINTR)
 342                                 continue;
 343
 344                         if (smbd_server_fd() == -1) {
 345                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 346                                          strerror(errno)));
 347                                 continue;
 348                         }
 349
 350                         if (smbd_server_fd() != -1 && sys_fork()==0) {
 351                                 /* Child code ... */
 352
 353                                 /* close the listening socket(s) */
 354                                 for(i = 0; i < num_sockets; i++)
 355                                         close(fd_listenset[i]);
 356
 357                                 /* close our standard file
 358                                    descriptors */
 359                                 close_low_fds(False);
 360                                 am_parent = 0;
 361
 362                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 363                                 set_socket_options(smbd_server_fd(),user_socket_options);
 364
 365                                 /* this is needed so that we get decent entries
 366                                    in smbstatus for port 445 connects */
 367                                 set_remote_machine_name(get_socket_addr(smbd_server_fd()));
 368
 369                                 /* Reset global variables in util.c so
 370                                    that client substitutions will be
 371                                    done correctly in the process.  */
 372                                 reset_globals_after_fork();
 373
 374                                 /* tdb needs special fork handling */
 375                                 tdb_reopen_all();
 376
 377                                 return True;
 378                         }
 379                         /* The parent doesn't need this socket */
 380                         close(smbd_server_fd());
 381
 382                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 383                                 Clear the closed fd info out of server_fd --
 384                                 and more importantly, out of client_fd in
 385                                 util_sock.c, to avoid a possible
 386                                 getpeername failure if we reopen the logs
 387                                 and use %I in the filename.
 388                         */
 389
 390                         smbd_set_server_fd(-1);
 391
 392                         /* Force parent to check log size after
 393                          * spawning child.  Fix from
 394                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 395                          * parent smbd will log to logserver.smb.  It
 396                          * writes only two messages for each child
 397                          * started/finished. But each child writes,
 398                          * say, 50 messages also in logserver.smb,
 399                          * begining with the debug_count of the
 400                          * parent, before the child opens its own log
 401                          * file logserver.client. In a worst case
 402                          * scenario the size of logserver.smb would be
 403                          * checked after about 50*50=2500 messages
 404                          * (ca. 100kb).
 405                          * */
 406                         force_check_log_size();
 407
 408                 } /* end for num */
 409         } /* end while 1 */
 410
 411 /* NOTREACHED   return True; */
 412 }
 413
 414 /****************************************************************************
 415  Reload the services file.
 416 **************************************************************************/
 417
 418 BOOL reload_services(BOOL test)
 419 {
 420         BOOL ret;
 421
 422         if (lp_loaded()) {
 423                 pstring fname;
 424                 pstrcpy(fname,lp_configfile());
 425                 if (file_exist(fname, NULL) &&
 426                     !strcsequal(fname, dyn_CONFIGFILE)) {
 427                         pstrcpy(dyn_CONFIGFILE, fname);
 428                         test = False;
 429                 }
 430         }
 431
 432         reopen_logs();
 433
 434         if (test && !lp_file_list_changed())
 435                 return(True);
 436
 437         lp_killunused(conn_snum_used);
 438
 439         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 440
 441         load_printers();
 442
 443         /* perhaps the config filename is now set */
 444         if (!test)
 445                 reload_services(True);
 446
 447         reopen_logs();
 448
 449         load_interfaces();
 450
 451         {
 452                 if (smbd_server_fd() != -1) {
 453                         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 454                         set_socket_options(smbd_server_fd(), user_socket_options);
 455                 }
 456         }
 457
 458         mangle_reset_cache();
 459         reset_stat_cache();
 460
 461         /* this forces service parameters to be flushed */
 462         set_current_service(NULL,True);
 463
 464         return(ret);
 465 }
 466
 467 #if DUMP_CORE
 468 /*******************************************************************
 469 prepare to dump a core file - carefully!
 470 ********************************************************************/
 471 static BOOL dump_core(void)
 472 {
 473         char *p;
 474         pstring dname;
 475
 476         pstrcpy(dname,lp_logfile());
 477         if ((p=strrchr_m(dname,'/'))) *p=0;
 478         pstrcat(dname,"/corefiles");
 479         mkdir(dname,0700);
 480         sys_chown(dname,getuid(),getgid());
 481         chmod(dname,0700);
 482         if (chdir(dname)) return(False);
 483         umask(~(0700));
 484
 485 #ifdef HAVE_GETRLIMIT
 486 #ifdef RLIMIT_CORE
 487         {
 488                 struct rlimit rlp;
 489                 getrlimit(RLIMIT_CORE, &rlp);
 490                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 491                 setrlimit(RLIMIT_CORE, &rlp);
 492                 getrlimit(RLIMIT_CORE, &rlp);
 493                 DEBUG(3,("Core limits now %d %d\n",
 494                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 495         }
 496 #endif
 497 #endif
 498
 499
 500         DEBUG(0,("Dumping core in %s\n", dname));
 501         abort();
 502         return(True);
 503 }
 504 #endif
 505
 506 /****************************************************************************
 507 update the current smbd process count
 508 ****************************************************************************/
 509
 510 static void decrement_smbd_process_count(void)
 511 {
 512         int32 total_smbds;
 513
 514         if (lp_max_smbd_processes()) {
 515                 total_smbds = 0;
 516                 tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds, -1);
 517         }
 518 }
 519
 520 /****************************************************************************
 521  Exit the server.
 522 ****************************************************************************/
 523
 524 void exit_server(char *reason)
 525 {
 526         static int firsttime=1;
 527         extern char *last_inbuf;
 528         extern struct auth_context *negprot_global_auth_context;
 529
 530         if (!firsttime)
 531                 exit(0);
 532         firsttime = 0;
 533
 534         change_to_root_user();
 535         DEBUG(2,("Closing connections\n"));
 536
 537         if (negprot_global_auth_context) {
 538                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 539         }
 540
 541         conn_close_all();
 542
 543         invalidate_all_vuids();
 544
 545         /* delete our entry in the connections database. */
 546         yield_connection(NULL,"");
 547
 548         respond_to_all_remaining_local_messages();
 549         decrement_smbd_process_count();
 550
 551 #ifdef WITH_DFS
 552         if (dcelogin_atmost_once) {
 553                 dfs_unlogin();
 554         }
 555 #endif
 556
 557         if (!reason) {
 558                 int oldlevel = DEBUGLEVEL;
 559                 DEBUGLEVEL = 10;
 560                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 561                 if (last_inbuf)
 562                         show_msg(last_inbuf);
 563                 DEBUGLEVEL = oldlevel;
 564                 DEBUG(0,("===============================================================\n"));
 565 #if DUMP_CORE
 566                 if (dump_core()) return;
 567 #endif
 568         }
 569
 570         locking_end();
 571         printing_end();
 572
 573         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 574         exit(0);
 575 }
 576
 577 /****************************************************************************
 578  Initialise connect, service and file structs.
 579 ****************************************************************************/
 580
 581 static void init_structs(void )
 582 {
 583         /*
 584          * Set the machine NETBIOS name if not already
 585          * set from the config file.
 586          */
 587
 588         if (!*global_myname) {
 589                 char *p;
 590                 pstrcpy( global_myname, myhostname() );
 591                 p = strchr_m(global_myname, '.' );
 592                 if (p)
 593                         *p = 0;
 594         }
 595
 596         strupper(global_myname);
 597
 598         conn_init();
 599
 600         file_init();
 601
 602         /* for RPC pipes */
 603         init_rpc_pipe_hnd();
 604
 605         init_dptrs();
 606
 607         secrets_init();
 608
 609 }
 610
 611 /****************************************************************************
 612  Usage on the program.
 613 ****************************************************************************/
 614
 615 static void usage(char *pname)
 616 {
 617
 618         d_printf("Usage: %s [-DaioPh?Vb] [-d debuglevel] [-l log basename] [-p port]\n", pname);
 619         d_printf("       [-O socket options] [-s services file]\n");
 620         d_printf("\t-D                    Become a daemon (default)\n");
 621         d_printf("\t-a                    Append to log file (default)\n");
 622         d_printf("\t-i                    Run interactive (not a daemon)\n" );
 623         d_printf("\t-o                    Overwrite log file, don't append\n");
 624         d_printf("\t-h                    Print usage\n");
 625         d_printf("\t-?                    Print usage\n");
 626         d_printf("\t-V                    Print version\n");
 627         d_printf("\t-b                    Print build options\n");
 628         d_printf("\t-d debuglevel         Set the debuglevel\n");
 629         d_printf("\t-l log basename.      Basename for log/debug files\n");
 630         d_printf("\t-p port               Listen on the specified port\n");
 631         d_printf("\t-O socket options     Socket options\n");
 632         d_printf("\t-s services file.     Filename of services file\n");
 633         d_printf("\n");
 634 }
 635
 636 /****************************************************************************
 637  main program.
 638 ****************************************************************************/
 639
 640  int main(int argc,char *argv[])
 641 {
 642         extern BOOL append_log;
 643         extern BOOL AllowDebugChange;
 644         extern char *optarg;
 645         /* shall I run as a daemon */
 646         BOOL is_daemon = False;
 647         BOOL interactive = False;
 648         BOOL specified_logfile = False;
 649         char *ports = NULL;
 650         int opt;
 651         pstring logfile;
 652
 653 #ifdef HAVE_SET_AUTH_PARAMETERS
 654         set_auth_parameters(argc,argv);
 655 #endif
 656
 657         /* this is for people who can't start the program correctly */
 658         while (argc > 1 && (*argv[1] != '-')) {
 659                 argv++;
 660                 argc--;
 661         }
 662
 663         while ( EOF != (opt = getopt(argc, argv, "O:l:s:d:Dp:h?bVaiof:")) )
 664                 switch (opt)  {
 665                 case 'O':
 666                         pstrcpy(user_socket_options,optarg);
 667                         break;
 668
 669                 case 's':
 670                         pstrcpy(dyn_CONFIGFILE,optarg);
 671                         break;
 672
 673                 case 'l':
 674                         specified_logfile = True;
 675                         pstr_sprintf(logfile, "%s/log.smbd", optarg);
 676                         lp_set_logfile(logfile);
 677                         break;
 678
 679                 case 'a':
 680                         append_log = True;
 681                         break;
 682
 683                 case 'i':
 684                         interactive = True;
 685                         break;
 686
 687                 case 'o':
 688                         append_log = False;
 689                         break;
 690
 691                 case 'D':
 692                         is_daemon = True;
 693                         break;
 694
 695                 case 'd':
 696                         if (*optarg == 'A')
 697                                 DEBUGLEVEL = 10000;
 698                         else
 699                                 DEBUGLEVEL = atoi(optarg);
 700                         AllowDebugChange = False;
 701                         break;
 702
 703                 case 'p':
 704                         ports = optarg;
 705                         break;
 706
 707                 case 'h':
 708                 case '?':
 709                         usage(argv[0]);
 710                         exit(0);
 711                         break;
 712
 713                 case 'V':
 714                         d_printf("Version %s\n",VERSION);
 715                         exit(0);
 716                         break;
 717                 case 'b':
 718                         build_options(True); /* Display output to screen as well as debug */
 719                         exit(0);
 720                         break;
 721                 default:
 722                         DEBUG(0,("Incorrect program usage - are you sure the command line is correct?\n"));
 723                         usage(argv[0]);
 724                         exit(1);
 725                 }
 726
 727 #ifdef HAVE_SETLUID
 728         /* needed for SecureWare on SCO */
 729         setluid(0);
 730 #endif
 731
 732         sec_init();
 733
 734         load_case_tables();
 735
 736         append_log = True;
 737
 738         if(!specified_logfile) {
 739                 pstr_sprintf(logfile, "%s/log.smbd", dyn_LOGFILEBASE);
 740                 lp_set_logfile(logfile);
 741         }
 742
 743         set_remote_machine_name("smbd");
 744
 745         setup_logging(argv[0],interactive);
 746
 747         /* we want to re-seed early to prevent time delays causing
 748            client problems at a later date. (tridge) */
 749         generate_random_buffer(NULL, 0, False);
 750
 751         /* make absolutely sure we run as root - to handle cases where people
 752            are crazy enough to have it setuid */
 753
 754         gain_root_privilege();
 755         gain_root_group_privilege();
 756
 757         fault_setup((void (*)(void *))exit_server);
 758         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 759         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 760
 761         /* we are never interested in SIGPIPE */
 762         BlockSignals(True,SIGPIPE);
 763
 764 #if defined(SIGFPE)
 765         /* we are never interested in SIGFPE */
 766         BlockSignals(True,SIGFPE);
 767 #endif
 768
 769 #if defined(SIGUSR2)
 770         /* We are no longer interested in USR2 */
 771         BlockSignals(True,SIGUSR2);
 772 #endif
 773
 774         /* POSIX demands that signals are inherited. If the invoking process has
 775          * these signals masked, we will have problems, as we won't recieve them. */
 776         BlockSignals(False, SIGHUP);
 777         BlockSignals(False, SIGUSR1);
 778         BlockSignals(False, SIGTERM);
 779
 780         /* we want total control over the permissions on created files,
 781            so set our umask to 0 */
 782         umask(0);
 783
 784         init_sec_ctx();
 785
 786         reopen_logs();
 787
 788         DEBUG(0,( "smbd version %s started.\n", VERSION));
 789         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2002\n"));
 790
 791         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 792                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 793
 794         /* Output the build options to the debug log */
 795         build_options(False);
 796
 797         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 798                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 799                 exit(1);
 800         }
 801
 802         /*
 803          * Do this before reload_services.
 804          */
 805
 806         if (!reload_services(False))
 807                 return(-1);
 808
 809         init_structs();
 810
 811 #ifdef WITH_PROFILE
 812         if (!profile_setup(False)) {
 813                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 814                 return -1;
 815         }
 816 #endif
 817
 818         fstrcpy(global_myworkgroup, lp_workgroup());
 819
 820         DEBUG(3,( "loaded services\n"));
 821
 822         if (!is_daemon && !is_a_socket(0)) {
 823                 if (!interactive)
 824                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 825
 826                 /*
 827                  * Setting is_daemon here prevents us from eventually calling
 828                  * the open_sockets_inetd()
 829                  */
 830
 831                 is_daemon = True;
 832         }
 833
 834         if (is_daemon && !interactive) {
 835                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 836                 become_daemon();
 837         }
 838
 839 #if HAVE_SETPGID
 840         /*
 841          * If we're interactive we want to set our own process group for
 842          * signal management.
 843          */
 844         if (interactive)
 845                 setpgid( (pid_t)0, (pid_t)0);
 846 #endif
 847
 848         if (!directory_exist(lp_lockdir(), NULL)) {
 849                 mkdir(lp_lockdir(), 0755);
 850         }
 851
 852         if (is_daemon) {
 853                 pidfile_create("smbd");
 854         }
 855
 856         if (!message_init()) {
 857                 exit(1);
 858         }
 859         register_msg_pool_usage();
 860         register_dmalloc_msgs();
 861
 862         /* Setup the main smbd so that we can get messages. */
 863         claim_connection(NULL,"",0,True);
 864
 865         /*
 866            DO NOT ENABLE THIS TILL YOU COPE WITH KILLING THESE TASKS AND INETD
 867            THIS *killed* LOTS OF BUILD FARM MACHINES. IT CREATED HUNDREDS OF
 868            smbd PROCESSES THAT NEVER DIE
 869            start_background_queue();
 870         */
 871
 872         if (!open_sockets_smbd(is_daemon,ports))
 873                 exit(1);
 874
 875         /*
 876          * everything after this point is run after the fork()
 877          */
 878
 879         namecache_enable();
 880
 881         if (!locking_init(0))
 882                 exit(1);
 883
 884         if (!print_backend_init())
 885                 exit(1);
 886
 887         if (!share_info_db_init())
 888                 exit(1);
 889
 890         if (!init_registry())
 891                 exit(1);
 892
 893         if(!initialize_password_db(False))
 894                 exit(1);
 895
 896         uni_group_cache_init(); /* Non-critical */
 897
 898         /* possibly reload the services file. */
 899         reload_services(True);
 900
 901         if(!get_global_sam_sid()) {
 902                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 903                 exit(1);
 904         }
 905
 906         if (!init_account_policy()) {
 907                 DEBUG(0,("Could not open account policy tdb.\n"));
 908                 exit(1);
 909         }
 910
 911         if (*lp_rootdir()) {
 912                 if (sys_chroot(lp_rootdir()) == 0)
 913                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 914         }
 915
 916         /* Setup oplocks */
 917         if (!init_oplocks())
 918                 exit(1);
 919
 920         /* Setup change notify */
 921         if (!init_change_notify())
 922                 exit(1);
 923
 924         /* re-initialise the timezone */
 925         TimeInit();
 926
 927         /* register our message handlers */
 928         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 929         talloc_init_named("dummy!");
 930
 931         smbd_process();
 932
 933         uni_group_cache_shutdown();
 934         exit_server("normal exit");
 935         return(0);
 936 }