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_decl_rpc;
  26
  27 static 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 struct auth_context *negprot_global_auth_context;
  36 extern pstring user_socket_options;
  37 extern SIG_ATOMIC_T got_sig_term;
  38 extern SIG_ATOMIC_T reload_after_sighup;
  39
  40 #ifdef WITH_DFS
  41 extern int dcelogin_atmost_once;
  42 #endif /* WITH_DFS */
  43
  44 /* really we should have a top level context structure that has the
  45    client file descriptor as an element. That would require a major rewrite :(
  46
  47    the following 2 functions are an alternative - they make the file
  48    descriptor private to smbd
  49  */
  50 static int server_fd = -1;
  51
  52 int smbd_server_fd(void)
  53 {
  54         return server_fd;
  55 }
  56
  57 static void smbd_set_server_fd(int fd)
  58 {
  59         server_fd = fd;
  60         client_setfd(fd);
  61 }
  62
  63 /*******************************************************************
  64  What to do when smb.conf is updated.
  65  ********************************************************************/
  66
  67 static void smb_conf_updated(int msg_type, struct process_id src,
  68                              void *buf, size_t len)
  69 {
  70         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was updated. Reloading.\n"));
  71         reload_services(False);
  72 }
  73
  74
  75 /****************************************************************************
  76  Terminate signal.
  77 ****************************************************************************/
  78
  79 static void sig_term(void)
  80 {
  81         got_sig_term = 1;
  82         sys_select_signal(SIGTERM);
  83 }
  84
  85 /****************************************************************************
  86  Catch a sighup.
  87 ****************************************************************************/
  88
  89 static void sig_hup(int sig)
  90 {
  91         reload_after_sighup = 1;
  92         sys_select_signal(SIGHUP);
  93 }
  94
  95 /****************************************************************************
  96   Send a SIGTERM to our process group.
  97 *****************************************************************************/
  98
  99 static void  killkids(void)
 100 {
 101         if(am_parent) kill(0,SIGTERM);
 102 }
 103
 104 /****************************************************************************
 105  Process a sam sync message - not sure whether to do this here or
 106  somewhere else.
 107 ****************************************************************************/
 108
 109 static void msg_sam_sync(int UNUSED(msg_type), struct process_id UNUSED(pid),
 110                          void *UNUSED(buf), size_t UNUSED(len))
 111 {
 112         DEBUG(10, ("** sam sync message received, ignoring\n"));
 113 }
 114
 115 /****************************************************************************
 116  Process a sam sync replicate message - not sure whether to do this here or
 117  somewhere else.
 118 ****************************************************************************/
 119
 120 static void msg_sam_repl(int msg_type, struct process_id pid,
 121                          void *buf, size_t len)
 122 {
 123         uint32 low_serial;
 124
 125         if (len != sizeof(uint32))
 126                 return;
 127
 128         low_serial = *((uint32 *)buf);
 129
 130         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 131                   low_serial));
 132 }
 133
 134 /****************************************************************************
 135  Open the socket communication - inetd.
 136 ****************************************************************************/
 137
 138 static BOOL open_sockets_inetd(void)
 139 {
 140         /* Started from inetd. fd 0 is the socket. */
 141         /* We will abort gracefully when the client or remote system
 142            goes away */
 143         smbd_set_server_fd(dup(0));
 144
 145         /* close our standard file descriptors */
 146         close_low_fds(False); /* Don't close stderr */
 147
 148         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 149         set_socket_options(smbd_server_fd(), user_socket_options);
 150
 151         return True;
 152 }
 153
 154 static void msg_exit_server(int msg_type, struct process_id src,
 155                             void *buf, size_t len)
 156 {
 157         DEBUG(3, ("got a SHUTDOWN message\n"));
 158         exit_server_cleanly(NULL);
 159 }
 160
 161 #ifdef DEVELOPER
 162 static void msg_inject_fault(int msg_type, struct process_id src,
 163                             void *buf, size_t len)
 164 {
 165         int sig;
 166
 167         if (len != sizeof(int)) {
 168
 169                 DEBUG(0, ("Process %llu sent bogus signal injection request\n",
 170                         (unsigned long long)src.pid));
 171                 return;
 172         }
 173
 174         sig = *(int *)buf;
 175         if (sig == -1) {
 176                 exit_server("internal error injected");
 177                 return;
 178         }
 179
 180 #if HAVE_STRSIGNAL
 181         DEBUG(0, ("Process %llu requested injection of signal %d (%s)\n",
 182                     (unsigned long long)src.pid, sig, strsignal(sig)));
 183 #else
 184         DEBUG(0, ("Process %llu requested injection of signal %d\n",
 185                     (unsigned long long)src.pid, sig));
 186 #endif
 187
 188         kill(sys_getpid(), sig);
 189 }
 190 #endif /* DEVELOPER */
 191
 192
 193 /****************************************************************************
 194  Have we reached the process limit ?
 195 ****************************************************************************/
 196
 197 static BOOL allowable_number_of_smbd_processes(void)
 198 {
 199         int max_processes = lp_max_smbd_processes();
 200
 201         if (!max_processes)
 202                 return True;
 203
 204         {
 205                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 206                 int32 val;
 207                 if (!tdb) {
 208                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 209                         return False;
 210                 }
 211
 212                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 213                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 214                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 215                                 tdb_errorstr(tdb) ));
 216                         return False;
 217                 }
 218                 if (val > max_processes) {
 219                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 220                                 val, max_processes ));
 221                         return False;
 222                 }
 223         }
 224         return True;
 225 }
 226
 227 /****************************************************************************
 228  Open the socket communication.
 229 ****************************************************************************/
 230
 231 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 232 {
 233         int num_interfaces = iface_count();
 234         int num_sockets = 0;
 235         int fd_listenset[FD_SETSIZE];
 236         fd_set listen_set;
 237         int s;
 238         int maxfd = 0;
 239         int i;
 240         char *ports;
 241
 242         if (!is_daemon) {
 243                 return open_sockets_inetd();
 244         }
 245
 246
 247 #ifdef HAVE_ATEXIT
 248         {
 249                 static int atexit_set;
 250                 if(atexit_set == 0) {
 251                         atexit_set=1;
 252                         atexit(killkids);
 253                 }
 254         }
 255 #endif
 256
 257         /* Stop zombies */
 258         CatchChild();
 259
 260         FD_ZERO(&listen_set);
 261
 262         /* use a reasonable default set of ports - listing on 445 and 139 */
 263         if (!smb_ports) {
 264                 ports = lp_smb_ports();
 265                 if (!ports || !*ports) {
 266                         ports = smb_xstrdup(SMB_PORTS);
 267                 } else {
 268                         ports = smb_xstrdup(ports);
 269                 }
 270         } else {
 271                 ports = smb_xstrdup(smb_ports);
 272         }
 273
 274         if (lp_interfaces() && lp_bind_interfaces_only()) {
 275                 /* We have been given an interfaces line, and been
 276                    told to only bind to those interfaces. Create a
 277                    socket per interface and bind to only these.
 278                 */
 279
 280                 /* Now open a listen socket for each of the
 281                    interfaces. */
 282                 for(i = 0; i < num_interfaces; i++) {
 283                         struct in_addr *ifip = iface_n_ip(i);
 284                         fstring tok;
 285                         const char *ptr;
 286
 287                         if(ifip == NULL) {
 288                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 289                                 continue;
 290                         }
 291
 292                         for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 293                                 unsigned port = atoi(tok);
 294                                 if (port == 0) {
 295                                         continue;
 296                                 }
 297                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 298                                 if(s == -1)
 299                                         return False;
 300
 301                                 /* ready to listen */
 302                                 set_socket_options(s,"SO_KEEPALIVE");
 303                                 set_socket_options(s,user_socket_options);
 304
 305                                 /* Set server socket to non-blocking for the accept. */
 306                                 set_blocking(s,False);
 307
 308                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 309                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 310                                         close(s);
 311                                         return False;
 312                                 }
 313                                 FD_SET(s,&listen_set);
 314                                 maxfd = MAX( maxfd, s);
 315
 316                                 num_sockets++;
 317                                 if (num_sockets >= FD_SETSIZE) {
 318                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 319                                         return False;
 320                                 }
 321                         }
 322                 }
 323         } else {
 324                 /* Just bind to 0.0.0.0 - accept connections
 325                    from anywhere. */
 326
 327                 fstring tok;
 328                 const char *ptr;
 329
 330                 num_interfaces = 1;
 331
 332                 for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 333                         unsigned port = atoi(tok);
 334                         if (port == 0) continue;
 335                         /* open an incoming socket */
 336                         s = open_socket_in(SOCK_STREAM, port, 0,
 337                                            interpret_addr(lp_socket_address()),True);
 338                         if (s == -1)
 339                                 return(False);
 340
 341                         /* ready to listen */
 342                         set_socket_options(s,"SO_KEEPALIVE");
 343                         set_socket_options(s,user_socket_options);
 344
 345                         /* Set server socket to non-blocking for the accept. */
 346                         set_blocking(s,False);
 347
 348                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 349                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 350                                          strerror(errno)));
 351                                 close(s);
 352                                 return False;
 353                         }
 354
 355                         fd_listenset[num_sockets] = s;
 356                         FD_SET(s,&listen_set);
 357                         maxfd = MAX( maxfd, s);
 358
 359                         num_sockets++;
 360
 361                         if (num_sockets >= FD_SETSIZE) {
 362                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 363                                 return False;
 364                         }
 365                 }
 366         }
 367
 368         SAFE_FREE(ports);
 369
 370         /* Listen to messages */
 371
 372         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 373         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 374         message_register(MSG_SHUTDOWN, msg_exit_server);
 375         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 376         message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated);
 377
 378 #ifdef DEVELOPER
 379         message_register(MSG_SMB_INJECT_FAULT, msg_inject_fault);
 380 #endif
 381
 382         /* now accept incoming connections - forking a new process
 383            for each incoming connection */
 384         DEBUG(2,("waiting for a connection\n"));
 385         while (1) {
 386                 fd_set lfds;
 387                 int num;
 388
 389                 /* Free up temporary memory from the main smbd. */
 390                 lp_TALLOC_FREE();
 391
 392                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 393                 message_dispatch();
 394
 395                 memcpy((char *)&lfds, (char *)&listen_set,
 396                        sizeof(listen_set));
 397
 398                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 399
 400                 if (num == -1 && errno == EINTR) {
 401                         if (got_sig_term) {
 402                                 exit_server_cleanly(NULL);
 403                         }
 404
 405                         /* check for sighup processing */
 406                         if (reload_after_sighup) {
 407                                 change_to_root_user();
 408                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 409                                 reload_services(False);
 410                                 reload_after_sighup = 0;
 411                         }
 412
 413                         continue;
 414                 }
 415
 416                 /* check if we need to reload services */
 417                 check_reload(time(NULL));
 418
 419                 /* Find the sockets that are read-ready -
 420                    accept on these. */
 421                 for( ; num > 0; num--) {
 422                         struct sockaddr addr;
 423                         socklen_t in_addrlen = sizeof(addr);
 424
 425                         s = -1;
 426                         for(i = 0; i < num_sockets; i++) {
 427                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 428                                         s = fd_listenset[i];
 429                                         /* Clear this so we don't look
 430                                            at it again. */
 431                                         FD_CLR(fd_listenset[i],&lfds);
 432                                         break;
 433                                 }
 434                         }
 435
 436                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 437
 438                         if (smbd_server_fd() == -1 && errno == EINTR)
 439                                 continue;
 440
 441                         if (smbd_server_fd() == -1) {
 442                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 443                                          strerror(errno)));
 444                                 continue;
 445                         }
 446
 447                         /* Ensure child is set to blocking mode */
 448                         set_blocking(smbd_server_fd(),True);
 449
 450                         if (smbd_server_fd() != -1 && interactive)
 451                                 return True;
 452
 453                         if (allowable_number_of_smbd_processes() &&
 454                             smbd_server_fd() != -1 && sys_fork()==0) {
 455                                 /* Child code ... */
 456
 457                                 /* close the listening socket(s) */
 458                                 for(i = 0; i < num_sockets; i++)
 459                                         close(fd_listenset[i]);
 460
 461                                 /* close our standard file
 462                                    descriptors */
 463                                 close_low_fds(False);
 464                                 am_parent = 0;
 465
 466                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 467                                 set_socket_options(smbd_server_fd(),user_socket_options);
 468
 469                                 /* this is needed so that we get decent entries
 470                                    in smbstatus for port 445 connects */
 471                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()),
 472                                                         False);
 473
 474                                 /* Reset the state of the random
 475                                  * number generation system, so
 476                                  * children do not get the same random
 477                                  * numbers as each other */
 478
 479                                 set_need_random_reseed();
 480                                 /* tdb needs special fork handling - remove
 481                                  * CLEAR_IF_FIRST flags */
 482                                 if (tdb_reopen_all(1) == -1) {
 483                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 484                                         smb_panic("tdb_reopen_all failed.");
 485                                 }
 486
 487                                 return True;
 488                         }
 489                         /* The parent doesn't need this socket */
 490                         close(smbd_server_fd());
 491
 492                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 493                                 Clear the closed fd info out of server_fd --
 494                                 and more importantly, out of client_fd in
 495                                 util_sock.c, to avoid a possible
 496                                 getpeername failure if we reopen the logs
 497                                 and use %I in the filename.
 498                         */
 499
 500                         smbd_set_server_fd(-1);
 501
 502                         /* Force parent to check log size after
 503                          * spawning child.  Fix from
 504                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 505                          * parent smbd will log to logserver.smb.  It
 506                          * writes only two messages for each child
 507                          * started/finished. But each child writes,
 508                          * say, 50 messages also in logserver.smb,
 509                          * begining with the debug_count of the
 510                          * parent, before the child opens its own log
 511                          * file logserver.client. In a worst case
 512                          * scenario the size of logserver.smb would be
 513                          * checked after about 50*50=2500 messages
 514                          * (ca. 100kb).
 515                          * */
 516                         force_check_log_size();
 517
 518                 } /* end for num */
 519         } /* end while 1 */
 520
 521 /* NOTREACHED   return True; */
 522 }
 523
 524 /****************************************************************************
 525  Reload printers
 526 **************************************************************************/
 527 void reload_printers(void)
 528 {
 529         int snum;
 530         int n_services = lp_numservices();
 531         int pnum = lp_servicenumber(PRINTERS_NAME);
 532         const char *pname;
 533
 534         pcap_cache_reload();
 535
 536         /* remove stale printers */
 537         for (snum = 0; snum < n_services; snum++) {
 538                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 539                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 540                                       lp_autoloaded(snum)))
 541                         continue;
 542
 543                 pname = lp_printername(snum);
 544                 if (!pcap_printername_ok(pname)) {
 545                         DEBUG(3, ("removing stale printer %s\n", pname));
 546
 547                         if (is_printer_published(NULL, snum, NULL))
 548                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 549                         del_a_printer(pname);
 550                         lp_killservice(snum);
 551                 }
 552         }
 553
 554         load_printers();
 555 }
 556
 557 /****************************************************************************
 558  Reload the services file.
 559 **************************************************************************/
 560
 561 BOOL reload_services(BOOL test)
 562 {
 563         BOOL ret;
 564
 565         if (lp_loaded()) {
 566                 pstring fname;
 567                 pstrcpy(fname,lp_configfile());
 568                 if (file_exist(fname, NULL) &&
 569                     !strcsequal(fname, dyn_CONFIGFILE)) {
 570                         pstrcpy(dyn_CONFIGFILE, fname);
 571                         test = False;
 572                 }
 573         }
 574
 575         reopen_logs();
 576
 577         if (test && !lp_file_list_changed())
 578                 return(True);
 579
 580         lp_killunused(conn_snum_used);
 581
 582         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
 583
 584         reload_printers();
 585
 586         /* perhaps the config filename is now set */
 587         if (!test)
 588                 reload_services(True);
 589
 590         reopen_logs();
 591
 592         load_interfaces();
 593
 594         if (smbd_server_fd() != -1) {
 595                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 596                 set_socket_options(smbd_server_fd(), user_socket_options);
 597         }
 598
 599         mangle_reset_cache();
 600         reset_stat_cache();
 601
 602         /* this forces service parameters to be flushed */
 603         set_current_service(NULL,0,True);
 604
 605         return(ret);
 606 }
 607
 608 /****************************************************************************
 609  Exit the server.
 610 ****************************************************************************/
 611
 612 /* Reasons for shutting down a server process. */
 613 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 614
 615 static void exit_server_common(enum server_exit_reason how,
 616         const char *const reason) NORETURN_ATTRIBUTE;
 617
 618 static void exit_server_common(enum server_exit_reason how,
 619         const char *const reason)
 620 {
 621         static int firsttime=1;
 622
 623         if (!firsttime)
 624                 exit(0);
 625         firsttime = 0;
 626
 627         change_to_root_user();
 628
 629         if (negprot_global_auth_context) {
 630                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 631         }
 632
 633         conn_close_all();
 634
 635         invalidate_all_vuids();
 636
 637         print_notify_send_messages(3); /* 3 second timeout. */
 638
 639         /* delete our entry in the connections database. */
 640         yield_connection(NULL,"");
 641
 642         respond_to_all_remaining_local_messages();
 643         decrement_smbd_process_count();
 644
 645 #ifdef WITH_DFS
 646         if (dcelogin_atmost_once) {
 647                 dfs_unlogin();
 648         }
 649 #endif
 650
 651         locking_end();
 652         printing_end();
 653
 654         if (how != SERVER_EXIT_NORMAL) {
 655                 int oldlevel = DEBUGLEVEL;
 656                 char *last_inbuf = get_InBuffer();
 657
 658                 DEBUGLEVEL = 10;
 659
 660                 DEBUGSEP(0);
 661                 DEBUG(0,("Abnormal server exit: %s\n",
 662                         reason ? reason : "no explanation provided"));
 663                 DEBUGSEP(0);
 664
 665                 log_stack_trace();
 666                 if (last_inbuf) {
 667                         DEBUG(0,("Last message was %s\n", LAST_MESSAGE()));
 668                         show_msg(last_inbuf);
 669                 }
 670
 671                 DEBUGLEVEL = oldlevel;
 672 #if DUMP_CORE
 673                 dump_core();
 674 #endif
 675
 676         } else {
 677                 DEBUG(3,("Server exit (%s)\n",
 678                         (reason ? reason : "normal exit")));
 679         }
 680
 681         exit(0);
 682 }
 683
 684 void exit_server(const char *const explanation)
 685 {
 686         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 687 }
 688
 689 void exit_server_cleanly(const char *const explanation)
 690 {
 691         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 692 }
 693
 694 void exit_server_fault(void)
 695 {
 696         exit_server("critical server fault");
 697 }
 698
 699 /****************************************************************************
 700  Initialise connect, service and file structs.
 701 ****************************************************************************/
 702
 703 static BOOL init_structs(void )
 704 {
 705         /*
 706          * Set the machine NETBIOS name if not already
 707          * set from the config file.
 708          */
 709
 710         if (!init_names())
 711                 return False;
 712
 713         conn_init();
 714
 715         file_init();
 716
 717         /* for RPC pipes */
 718         init_rpc_pipe_hnd();
 719
 720         init_dptrs();
 721
 722         secrets_init();
 723
 724         return True;
 725 }
 726
 727 /****************************************************************************
 728  main program.
 729 ****************************************************************************/
 730
 731 /* Declare prototype for build_options() to avoid having to run it through
 732    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 733    prototype generation system is too complicated. */
 734
 735 void build_options(BOOL screen);
 736
 737  int main(int argc,const char *argv[])
 738 {
 739         /* shall I run as a daemon */
 740         static BOOL is_daemon = False;
 741         static BOOL interactive = False;
 742         static BOOL Fork = True;
 743         static BOOL no_process_group = False;
 744         static BOOL log_stdout = False;
 745         static char *ports = NULL;
 746         int opt;
 747         poptContext pc;
 748
 749         struct poptOption long_options[] = {
 750         POPT_AUTOHELP
 751         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 752         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 753         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools, etc.)" },
 754         {"no-process-group", '\0', POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
 755         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 756         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 757         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 758         POPT_COMMON_SAMBA
 759         POPT_COMMON_DYNCONFIG
 760         POPT_TABLEEND
 761         };
 762
 763         load_case_tables();
 764
 765 #ifdef HAVE_SET_AUTH_PARAMETERS
 766         set_auth_parameters(argc,argv);
 767 #endif
 768
 769         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 770
 771         while((opt = poptGetNextOpt(pc)) != -1) {
 772                 switch (opt)  {
 773                 case 'b':
 774                         build_options(True); /* Display output to screen as well as debug */
 775                         exit(0);
 776                         break;
 777                 }
 778         }
 779
 780         poptFreeContext(pc);
 781
 782 #ifdef HAVE_SETLUID
 783         /* needed for SecureWare on SCO */
 784         setluid(0);
 785 #endif
 786
 787         sec_init();
 788
 789         set_remote_machine_name("smbd", False);
 790
 791         if (interactive) {
 792                 Fork = False;
 793                 log_stdout = True;
 794         }
 795
 796         if (interactive && (DEBUGLEVEL >= 9)) {
 797                 talloc_enable_leak_report();
 798         }
 799
 800         if (log_stdout && Fork) {
 801                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 802                 exit(1);
 803         }
 804
 805         setup_logging(argv[0],log_stdout);
 806
 807         /* we want to re-seed early to prevent time delays causing
 808            client problems at a later date. (tridge) */
 809         generate_random_buffer(NULL, 0);
 810
 811         /* make absolutely sure we run as root - to handle cases where people
 812            are crazy enough to have it setuid */
 813
 814         gain_root_privilege();
 815         gain_root_group_privilege();
 816
 817         fault_setup((void (*)(void *))exit_server_fault);
 818         dump_core_setup("smbd");
 819
 820         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 821         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 822
 823         /* we are never interested in SIGPIPE */
 824         BlockSignals(True,SIGPIPE);
 825
 826 #if defined(SIGFPE)
 827         /* we are never interested in SIGFPE */
 828         BlockSignals(True,SIGFPE);
 829 #endif
 830
 831 #if defined(SIGUSR2)
 832         /* We are no longer interested in USR2 */
 833         BlockSignals(True,SIGUSR2);
 834 #endif
 835
 836         /* POSIX demands that signals are inherited. If the invoking process has
 837          * these signals masked, we will have problems, as we won't recieve them. */
 838         BlockSignals(False, SIGHUP);
 839         BlockSignals(False, SIGUSR1);
 840         BlockSignals(False, SIGTERM);
 841
 842         /* we want total control over the permissions on created files,
 843            so set our umask to 0 */
 844         umask(0);
 845
 846         init_sec_ctx();
 847
 848         reopen_logs();
 849
 850         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 851         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 852
 853         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 854                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 855
 856         /* Output the build options to the debug log */
 857         build_options(False);
 858
 859         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 860                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 861                 exit(1);
 862         }
 863
 864         /*
 865          * Do this before reload_services.
 866          */
 867
 868         if (!reload_services(False))
 869                 return(-1);
 870
 871         init_structs();
 872
 873 #ifdef WITH_PROFILE
 874         if (!profile_setup(False)) {
 875                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 876                 return -1;
 877         }
 878 #endif
 879
 880         DEBUG(3,( "loaded services\n"));
 881
 882         if (!is_daemon && !is_a_socket(0)) {
 883                 if (!interactive)
 884                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 885
 886                 /*
 887                  * Setting is_daemon here prevents us from eventually calling
 888                  * the open_sockets_inetd()
 889                  */
 890
 891                 is_daemon = True;
 892         }
 893
 894         if (is_daemon && !interactive) {
 895                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 896                 become_daemon(Fork, no_process_group);
 897         }
 898
 899 #if HAVE_SETPGID
 900         /*
 901          * If we're interactive we want to set our own process group for
 902          * signal management.
 903          */
 904         if (interactive && !no_process_group)
 905                 setpgid( (pid_t)0, (pid_t)0);
 906 #endif
 907
 908         if (!directory_exist(lp_lockdir(), NULL))
 909                 mkdir(lp_lockdir(), 0755);
 910
 911         if (is_daemon)
 912                 pidfile_create("smbd");
 913
 914         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 915         if (!message_init())
 916                 exit(1);
 917
 918         /* Initialise the password backed before the global_sam_sid
 919            to ensure that we fetch from ldap before we make a domain sid up */
 920
 921         if(!initialize_password_db(False))
 922                 exit(1);
 923
 924         if (!secrets_init()) {
 925                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
 926                 exit(1);
 927         }
 928
 929         if(!get_global_sam_sid()) {
 930                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 931                 exit(1);
 932         }
 933
 934         if (!session_init())
 935                 exit(1);
 936
 937         if (conn_tdb_ctx() == NULL)
 938                 exit(1);
 939
 940         if (!locking_init(0))
 941                 exit(1);
 942
 943         namecache_enable();
 944
 945         if (!init_registry())
 946                 exit(1);
 947
 948 #if 0
 949         if (!init_svcctl_db())
 950                 exit(1);
 951 #endif
 952
 953         if (!print_backend_init())
 954                 exit(1);
 955
 956         if (!init_guest_info()) {
 957                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
 958                 return -1;
 959         }
 960
 961         /* Setup the main smbd so that we can get messages. */
 962         /* don't worry about general printing messages here */
 963
 964         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 965
 966         /* only start the background queue daemon if we are
 967            running as a daemon -- bad things will happen if
 968            smbd is launched via inetd and we fork a copy of
 969            ourselves here */
 970
 971         if ( is_daemon && !interactive )
 972                 start_background_queue();
 973
 974         /* Always attempt to initialize DMAPI. We will only use it later if
 975          * lp_dmapi_support is set on the share, but we need a single global
 976          * session to work with.
 977          */
 978         dmapi_init_session();
 979
 980         if (!open_sockets_smbd(is_daemon, interactive, ports))
 981                 exit(1);
 982
 983         /*
 984          * everything after this point is run after the fork()
 985          */
 986
 987         static_init_rpc;
 988
 989         init_modules();
 990
 991         /* possibly reload the services file. */
 992         reload_services(True);
 993
 994         if (!init_account_policy()) {
 995                 DEBUG(0,("Could not open account policy tdb.\n"));
 996                 exit(1);
 997         }
 998
 999         if (*lp_rootdir()) {
1000                 if (sys_chroot(lp_rootdir()) == 0)
1001                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1002         }
1003
1004         /* Setup oplocks */
1005         if (!init_oplocks())
1006                 exit(1);
1007
1008         /* Setup change notify */
1009         if (!init_change_notify())
1010                 exit(1);
1011
1012         /* Setup aio signal handler. */
1013         initialize_async_io_handler();
1014
1015         /* re-initialise the timezone */
1016         TimeInit();
1017
1018         /* register our message handlers */
1019         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
1020
1021         smbd_process();
1022
1023         namecache_shutdown();
1024
1025         exit_server_cleanly(NULL);
1026         return(0);
1027 }