source3/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7
   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 struct auth_context *negprot_global_auth_context;
  34 extern pstring user_socket_options;
  35 extern SIG_ATOMIC_T got_sig_term;
  36 extern SIG_ATOMIC_T reload_after_sighup;
  37
  38 #ifdef WITH_DFS
  39 extern int dcelogin_atmost_once;
  40 #endif /* WITH_DFS */
  41
  42 /* really we should have a top level context structure that has the
  43    client file descriptor as an element. That would require a major rewrite :(
  44
  45    the following 2 functions are an alternative - they make the file
  46    descriptor private to smbd
  47  */
  48 static int server_fd = -1;
  49
  50 int smbd_server_fd(void)
  51 {
  52         return server_fd;
  53 }
  54
  55 static void smbd_set_server_fd(int fd)
  56 {
  57         server_fd = fd;
  58         client_setfd(fd);
  59 }
  60
  61 /*******************************************************************
  62  What to do when smb.conf is updated.
  63  ********************************************************************/
  64
  65 static void smb_conf_updated(int msg_type, struct process_id src,
  66                              void *buf, size_t len)
  67 {
  68         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was updated. Reloading.\n"));
  69         reload_services(False);
  70 }
  71
  72
  73 /****************************************************************************
  74  Terminate signal.
  75 ****************************************************************************/
  76
  77 static void sig_term(void)
  78 {
  79         got_sig_term = 1;
  80         sys_select_signal(SIGTERM);
  81 }
  82
  83 /****************************************************************************
  84  Catch a sighup.
  85 ****************************************************************************/
  86
  87 static void sig_hup(int sig)
  88 {
  89         reload_after_sighup = 1;
  90         sys_select_signal(SIGHUP);
  91 }
  92
  93 /****************************************************************************
  94   Send a SIGTERM to our process group.
  95 *****************************************************************************/
  96
  97 static void  killkids(void)
  98 {
  99         if(am_parent) kill(0,SIGTERM);
 100 }
 101
 102 /****************************************************************************
 103  Process a sam sync message - not sure whether to do this here or
 104  somewhere else.
 105 ****************************************************************************/
 106
 107 static void msg_sam_sync(int UNUSED(msg_type), struct process_id UNUSED(pid),
 108                          void *UNUSED(buf), size_t UNUSED(len))
 109 {
 110         DEBUG(10, ("** sam sync message received, ignoring\n"));
 111 }
 112
 113 /****************************************************************************
 114  Process a sam sync replicate message - not sure whether to do this here or
 115  somewhere else.
 116 ****************************************************************************/
 117
 118 static void msg_sam_repl(int msg_type, struct process_id pid,
 119                          void *buf, size_t len)
 120 {
 121         uint32 low_serial;
 122
 123         if (len != sizeof(uint32))
 124                 return;
 125
 126         low_serial = *((uint32 *)buf);
 127
 128         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 129                   low_serial));
 130 }
 131
 132 /****************************************************************************
 133  Open the socket communication - inetd.
 134 ****************************************************************************/
 135
 136 static BOOL open_sockets_inetd(void)
 137 {
 138         /* Started from inetd. fd 0 is the socket. */
 139         /* We will abort gracefully when the client or remote system
 140            goes away */
 141         smbd_set_server_fd(dup(0));
 142
 143         /* close our standard file descriptors */
 144         close_low_fds(False); /* Don't close stderr */
 145
 146         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 147         set_socket_options(smbd_server_fd(), user_socket_options);
 148
 149         return True;
 150 }
 151
 152 static void msg_exit_server(int msg_type, struct process_id src,
 153                             void *buf, size_t len)
 154 {
 155         DEBUG(3, ("got a SHUTDOWN message\n"));
 156         exit_server_cleanly(NULL);
 157 }
 158
 159 #ifdef DEVELOPER
 160 static void msg_inject_fault(int msg_type, struct process_id src,
 161                             void *buf, size_t len)
 162 {
 163         int sig;
 164
 165         if (len != sizeof(int)) {
 166
 167                 DEBUG(0, ("Process %llu sent bogus signal injection request\n",
 168                         (unsigned long long)src.pid));
 169                 return;
 170         }
 171
 172         sig = *(int *)buf;
 173         if (sig == -1) {
 174                 exit_server("internal error injected");
 175                 return;
 176         }
 177
 178 #if HAVE_STRSIGNAL
 179         DEBUG(0, ("Process %llu requested injection of signal %d (%s)\n",
 180                     (unsigned long long)src.pid, sig, strsignal(sig)));
 181 #else
 182         DEBUG(0, ("Process %llu requested injection of signal %d\n",
 183                     (unsigned long long)src.pid, sig));
 184 #endif
 185
 186         kill(sys_getpid(), sig);
 187 }
 188 #endif /* DEVELOPER */
 189
 190
 191 /****************************************************************************
 192  Have we reached the process limit ?
 193 ****************************************************************************/
 194
 195 static BOOL allowable_number_of_smbd_processes(void)
 196 {
 197         int max_processes = lp_max_smbd_processes();
 198
 199         if (!max_processes)
 200                 return True;
 201
 202         {
 203                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 204                 int32 val;
 205                 if (!tdb) {
 206                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 207                         return False;
 208                 }
 209
 210                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 211                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 212                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 213                                 tdb_errorstr(tdb) ));
 214                         return False;
 215                 }
 216                 if (val > max_processes) {
 217                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 218                                 val, max_processes ));
 219                         return False;
 220                 }
 221         }
 222         return True;
 223 }
 224
 225 /****************************************************************************
 226  Open the socket communication.
 227 ****************************************************************************/
 228
 229 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 230 {
 231         int num_interfaces = iface_count();
 232         int num_sockets = 0;
 233         int fd_listenset[FD_SETSIZE];
 234         fd_set listen_set;
 235         int s;
 236         int maxfd = 0;
 237         int i;
 238         char *ports;
 239
 240         if (!is_daemon) {
 241                 return open_sockets_inetd();
 242         }
 243
 244
 245 #ifdef HAVE_ATEXIT
 246         {
 247                 static int atexit_set;
 248                 if(atexit_set == 0) {
 249                         atexit_set=1;
 250                         atexit(killkids);
 251                 }
 252         }
 253 #endif
 254
 255         /* Stop zombies */
 256         CatchChild();
 257
 258         FD_ZERO(&listen_set);
 259
 260         /* use a reasonable default set of ports - listing on 445 and 139 */
 261         if (!smb_ports) {
 262                 ports = lp_smb_ports();
 263                 if (!ports || !*ports) {
 264                         ports = smb_xstrdup(SMB_PORTS);
 265                 } else {
 266                         ports = smb_xstrdup(ports);
 267                 }
 268         } else {
 269                 ports = smb_xstrdup(smb_ports);
 270         }
 271
 272         if (lp_interfaces() && lp_bind_interfaces_only()) {
 273                 /* We have been given an interfaces line, and been
 274                    told to only bind to those interfaces. Create a
 275                    socket per interface and bind to only these.
 276                 */
 277
 278                 /* Now open a listen socket for each of the
 279                    interfaces. */
 280                 for(i = 0; i < num_interfaces; i++) {
 281                         struct in_addr *ifip = iface_n_ip(i);
 282                         fstring tok;
 283                         const char *ptr;
 284
 285                         if(ifip == NULL) {
 286                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 287                                 continue;
 288                         }
 289
 290                         for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 291                                 unsigned port = atoi(tok);
 292                                 if (port == 0) {
 293                                         continue;
 294                                 }
 295                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 296                                 if(s == -1)
 297                                         return False;
 298
 299                                 /* ready to listen */
 300                                 set_socket_options(s,"SO_KEEPALIVE");
 301                                 set_socket_options(s,user_socket_options);
 302
 303                                 /* Set server socket to non-blocking for the accept. */
 304                                 set_blocking(s,False);
 305
 306                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 307                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 308                                         close(s);
 309                                         return False;
 310                                 }
 311                                 FD_SET(s,&listen_set);
 312                                 maxfd = MAX( maxfd, s);
 313
 314                                 num_sockets++;
 315                                 if (num_sockets >= FD_SETSIZE) {
 316                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 317                                         return False;
 318                                 }
 319                         }
 320                 }
 321         } else {
 322                 /* Just bind to 0.0.0.0 - accept connections
 323                    from anywhere. */
 324
 325                 fstring tok;
 326                 const char *ptr;
 327
 328                 num_interfaces = 1;
 329
 330                 for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 331                         unsigned port = atoi(tok);
 332                         if (port == 0) continue;
 333                         /* open an incoming socket */
 334                         s = open_socket_in(SOCK_STREAM, port, 0,
 335                                            interpret_addr(lp_socket_address()),True);
 336                         if (s == -1)
 337                                 return(False);
 338
 339                         /* ready to listen */
 340                         set_socket_options(s,"SO_KEEPALIVE");
 341                         set_socket_options(s,user_socket_options);
 342
 343                         /* Set server socket to non-blocking for the accept. */
 344                         set_blocking(s,False);
 345
 346                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 347                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 348                                          strerror(errno)));
 349                                 close(s);
 350                                 return False;
 351                         }
 352
 353                         fd_listenset[num_sockets] = s;
 354                         FD_SET(s,&listen_set);
 355                         maxfd = MAX( maxfd, s);
 356
 357                         num_sockets++;
 358
 359                         if (num_sockets >= FD_SETSIZE) {
 360                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 361                                 return False;
 362                         }
 363                 }
 364         }
 365
 366         SAFE_FREE(ports);
 367
 368         /* Listen to messages */
 369
 370         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 371         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 372         message_register(MSG_SHUTDOWN, msg_exit_server);
 373         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 374         message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated);
 375
 376 #ifdef DEVELOPER
 377         message_register(MSG_SMB_INJECT_FAULT, msg_inject_fault);
 378 #endif
 379
 380         /* now accept incoming connections - forking a new process
 381            for each incoming connection */
 382         DEBUG(2,("waiting for a connection\n"));
 383         while (1) {
 384                 fd_set lfds;
 385                 int num;
 386
 387                 /* Free up temporary memory from the main smbd. */
 388                 lp_TALLOC_FREE();
 389
 390                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 391                 message_dispatch();
 392
 393                 memcpy((char *)&lfds, (char *)&listen_set,
 394                        sizeof(listen_set));
 395
 396                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 397
 398                 if (num == -1 && errno == EINTR) {
 399                         if (got_sig_term) {
 400                                 exit_server_cleanly(NULL);
 401                         }
 402
 403                         /* check for sighup processing */
 404                         if (reload_after_sighup) {
 405                                 change_to_root_user();
 406                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 407                                 reload_services(False);
 408                                 reload_after_sighup = 0;
 409                         }
 410
 411                         continue;
 412                 }
 413
 414                 /* check if we need to reload services */
 415                 check_reload(time(NULL));
 416
 417                 /* Find the sockets that are read-ready -
 418                    accept on these. */
 419                 for( ; num > 0; num--) {
 420                         struct sockaddr addr;
 421                         socklen_t in_addrlen = sizeof(addr);
 422
 423                         s = -1;
 424                         for(i = 0; i < num_sockets; i++) {
 425                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 426                                         s = fd_listenset[i];
 427                                         /* Clear this so we don't look
 428                                            at it again. */
 429                                         FD_CLR(fd_listenset[i],&lfds);
 430                                         break;
 431                                 }
 432                         }
 433
 434                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 435
 436                         if (smbd_server_fd() == -1 && errno == EINTR)
 437                                 continue;
 438
 439                         if (smbd_server_fd() == -1) {
 440                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 441                                          strerror(errno)));
 442                                 continue;
 443                         }
 444
 445                         /* Ensure child is set to blocking mode */
 446                         set_blocking(smbd_server_fd(),True);
 447
 448                         if (smbd_server_fd() != -1 && interactive)
 449                                 return True;
 450
 451                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 452                                 /* Child code ... */
 453
 454                                 /* close the listening socket(s) */
 455                                 for(i = 0; i < num_sockets; i++)
 456                                         close(fd_listenset[i]);
 457
 458                                 /* close our standard file
 459                                    descriptors */
 460                                 close_low_fds(False);
 461                                 am_parent = 0;
 462
 463                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 464                                 set_socket_options(smbd_server_fd(),user_socket_options);
 465
 466                                 /* this is needed so that we get decent entries
 467                                    in smbstatus for port 445 connects */
 468                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 469
 470                                 /* Reset the state of the random
 471                                  * number generation system, so
 472                                  * children do not get the same random
 473                                  * numbers as each other */
 474
 475                                 set_need_random_reseed();
 476                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 477                                 if (tdb_reopen_all(1) == -1) {
 478                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 479                                         smb_panic("tdb_reopen_all failed.");
 480                                 }
 481
 482                                 return True;
 483                         }
 484                         /* The parent doesn't need this socket */
 485                         close(smbd_server_fd());
 486
 487                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 488                                 Clear the closed fd info out of server_fd --
 489                                 and more importantly, out of client_fd in
 490                                 util_sock.c, to avoid a possible
 491                                 getpeername failure if we reopen the logs
 492                                 and use %I in the filename.
 493                         */
 494
 495                         smbd_set_server_fd(-1);
 496
 497                         /* Force parent to check log size after
 498                          * spawning child.  Fix from
 499                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 500                          * parent smbd will log to logserver.smb.  It
 501                          * writes only two messages for each child
 502                          * started/finished. But each child writes,
 503                          * say, 50 messages also in logserver.smb,
 504                          * begining with the debug_count of the
 505                          * parent, before the child opens its own log
 506                          * file logserver.client. In a worst case
 507                          * scenario the size of logserver.smb would be
 508                          * checked after about 50*50=2500 messages
 509                          * (ca. 100kb).
 510                          * */
 511                         force_check_log_size();
 512
 513                 } /* end for num */
 514         } /* end while 1 */
 515
 516 /* NOTREACHED   return True; */
 517 }
 518
 519 /****************************************************************************
 520  Reload printers
 521 **************************************************************************/
 522 void reload_printers(void)
 523 {
 524         int snum;
 525         int n_services = lp_numservices();
 526         int pnum = lp_servicenumber(PRINTERS_NAME);
 527         const char *pname;
 528
 529         pcap_cache_reload();
 530
 531         /* remove stale printers */
 532         for (snum = 0; snum < n_services; snum++) {
 533                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 534                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 535                                       lp_autoloaded(snum)))
 536                         continue;
 537
 538                 pname = lp_printername(snum);
 539                 if (!pcap_printername_ok(pname)) {
 540                         DEBUG(3, ("removing stale printer %s\n", pname));
 541
 542                         if (is_printer_published(NULL, snum, NULL))
 543                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 544                         del_a_printer(pname);
 545                         lp_killservice(snum);
 546                 }
 547         }
 548
 549         load_printers();
 550 }
 551
 552 /****************************************************************************
 553  Reload the services file.
 554 **************************************************************************/
 555
 556 BOOL reload_services(BOOL test)
 557 {
 558         BOOL ret;
 559
 560         if (lp_loaded()) {
 561                 pstring fname;
 562                 pstrcpy(fname,lp_configfile());
 563                 if (file_exist(fname, NULL) &&
 564                     !strcsequal(fname, dyn_CONFIGFILE)) {
 565                         pstrcpy(dyn_CONFIGFILE, fname);
 566                         test = False;
 567                 }
 568         }
 569
 570         reopen_logs();
 571
 572         if (test && !lp_file_list_changed())
 573                 return(True);
 574
 575         lp_killunused(conn_snum_used);
 576
 577         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
 578
 579         reload_printers();
 580
 581         /* perhaps the config filename is now set */
 582         if (!test)
 583                 reload_services(True);
 584
 585         reopen_logs();
 586
 587         load_interfaces();
 588
 589         if (smbd_server_fd() != -1) {
 590                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 591                 set_socket_options(smbd_server_fd(), user_socket_options);
 592         }
 593
 594         mangle_reset_cache();
 595         reset_stat_cache();
 596
 597         /* this forces service parameters to be flushed */
 598         set_current_service(NULL,0,True);
 599
 600         return(ret);
 601 }
 602
 603 /****************************************************************************
 604  Exit the server.
 605 ****************************************************************************/
 606
 607 /* Reasons for shutting down a server process. */
 608 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 609
 610 static void exit_server_common(enum server_exit_reason how,
 611         const char *const reason) NORETURN_ATTRIBUTE;
 612
 613 static void exit_server_common(enum server_exit_reason how,
 614         const char *const reason)
 615 {
 616         static int firsttime=1;
 617
 618         if (!firsttime)
 619                 exit(0);
 620         firsttime = 0;
 621
 622         change_to_root_user();
 623
 624         if (negprot_global_auth_context) {
 625                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 626         }
 627
 628         conn_close_all();
 629
 630         invalidate_all_vuids();
 631
 632         print_notify_send_messages(3); /* 3 second timeout. */
 633
 634         /* delete our entry in the connections database. */
 635         yield_connection(NULL,"");
 636
 637         respond_to_all_remaining_local_messages();
 638         decrement_smbd_process_count();
 639
 640 #ifdef WITH_DFS
 641         if (dcelogin_atmost_once) {
 642                 dfs_unlogin();
 643         }
 644 #endif
 645
 646         locking_end();
 647         printing_end();
 648
 649         if (how != SERVER_EXIT_NORMAL) {
 650                 int oldlevel = DEBUGLEVEL;
 651                 char *last_inbuf = get_InBuffer();
 652
 653                 DEBUGLEVEL = 10;
 654
 655                 DEBUGSEP(0);
 656                 DEBUG(0,("Abnormal server exit: %s\n",
 657                         reason ? reason : "no explanation provided"));
 658                 DEBUGSEP(0);
 659
 660                 log_stack_trace();
 661                 if (last_inbuf) {
 662                         DEBUG(0,("Last message was %s\n", LAST_MESSAGE()));
 663                         show_msg(last_inbuf);
 664                 }
 665
 666                 DEBUGLEVEL = oldlevel;
 667 #if DUMP_CORE
 668                 dump_core();
 669 #endif
 670
 671         } else {
 672                 DEBUG(3,("Server exit (%s)\n",
 673                         (reason ? reason : "normal exit")));
 674         }
 675
 676         exit(0);
 677 }
 678
 679 void exit_server(const char *const explanation)
 680 {
 681         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 682 }
 683
 684 void exit_server_cleanly(const char *const explanation)
 685 {
 686         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 687 }
 688
 689 void exit_server_fault(void)
 690 {
 691         exit_server("critical server fault");
 692 }
 693
 694 /****************************************************************************
 695  Initialise connect, service and file structs.
 696 ****************************************************************************/
 697
 698 static BOOL init_structs(void )
 699 {
 700         /*
 701          * Set the machine NETBIOS name if not already
 702          * set from the config file.
 703          */
 704
 705         if (!init_names())
 706                 return False;
 707
 708         conn_init();
 709
 710         file_init();
 711
 712         /* for RPC pipes */
 713         init_rpc_pipe_hnd();
 714
 715         init_dptrs();
 716
 717         secrets_init();
 718
 719         return True;
 720 }
 721
 722 /****************************************************************************
 723  main program.
 724 ****************************************************************************/
 725
 726 /* Declare prototype for build_options() to avoid having to run it through
 727    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 728    prototype generation system is too complicated. */
 729
 730 void build_options(BOOL screen);
 731
 732  int main(int argc,const char *argv[])
 733 {
 734         /* shall I run as a daemon */
 735         static BOOL is_daemon = False;
 736         static BOOL interactive = False;
 737         static BOOL Fork = True;
 738         static BOOL no_process_group = False;
 739         static BOOL log_stdout = False;
 740         static char *ports = NULL;
 741         int opt;
 742         poptContext pc;
 743
 744         struct poptOption long_options[] = {
 745                 POPT_AUTOHELP
 746         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 747         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 748         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 749         {"no-process-group", 0, POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
 750         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 751         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 752         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 753         POPT_COMMON_SAMBA
 754         { NULL }
 755         };
 756
 757         load_case_tables();
 758
 759 #ifdef HAVE_SET_AUTH_PARAMETERS
 760         set_auth_parameters(argc,argv);
 761 #endif
 762
 763         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 764
 765         while((opt = poptGetNextOpt(pc)) != -1) {
 766                 switch (opt)  {
 767                 case 'b':
 768                         build_options(True); /* Display output to screen as well as debug */
 769                         exit(0);
 770                         break;
 771                 }
 772         }
 773
 774         poptFreeContext(pc);
 775
 776 #ifdef HAVE_SETLUID
 777         /* needed for SecureWare on SCO */
 778         setluid(0);
 779 #endif
 780
 781         sec_init();
 782
 783         set_remote_machine_name("smbd", False);
 784
 785         if (interactive) {
 786                 Fork = False;
 787                 log_stdout = True;
 788         }
 789
 790         if (interactive && (DEBUGLEVEL >= 9)) {
 791                 talloc_enable_leak_report();
 792         }
 793
 794         if (log_stdout && Fork) {
 795                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 796                 exit(1);
 797         }
 798
 799         setup_logging(argv[0],log_stdout);
 800
 801         /* we want to re-seed early to prevent time delays causing
 802            client problems at a later date. (tridge) */
 803         generate_random_buffer(NULL, 0);
 804
 805         /* make absolutely sure we run as root - to handle cases where people
 806            are crazy enough to have it setuid */
 807
 808         gain_root_privilege();
 809         gain_root_group_privilege();
 810
 811         fault_setup((void (*)(void *))exit_server_fault);
 812         dump_core_setup("smbd");
 813
 814         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 815         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 816
 817         /* we are never interested in SIGPIPE */
 818         BlockSignals(True,SIGPIPE);
 819
 820 #if defined(SIGFPE)
 821         /* we are never interested in SIGFPE */
 822         BlockSignals(True,SIGFPE);
 823 #endif
 824
 825 #if defined(SIGUSR2)
 826         /* We are no longer interested in USR2 */
 827         BlockSignals(True,SIGUSR2);
 828 #endif
 829
 830         /* POSIX demands that signals are inherited. If the invoking process has
 831          * these signals masked, we will have problems, as we won't recieve them. */
 832         BlockSignals(False, SIGHUP);
 833         BlockSignals(False, SIGUSR1);
 834         BlockSignals(False, SIGTERM);
 835
 836         /* we want total control over the permissions on created files,
 837            so set our umask to 0 */
 838         umask(0);
 839
 840         init_sec_ctx();
 841
 842         reopen_logs();
 843
 844         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 845         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 846
 847         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 848                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 849
 850         /* Output the build options to the debug log */
 851         build_options(False);
 852
 853         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 854                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 855                 exit(1);
 856         }
 857
 858         /*
 859          * Do this before reload_services.
 860          */
 861
 862         if (!reload_services(False))
 863                 return(-1);
 864
 865         init_structs();
 866
 867 #ifdef WITH_PROFILE
 868         if (!profile_setup(False)) {
 869                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 870                 return -1;
 871         }
 872 #endif
 873
 874         DEBUG(3,( "loaded services\n"));
 875
 876         if (!is_daemon && !is_a_socket(0)) {
 877                 if (!interactive)
 878                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 879
 880                 /*
 881                  * Setting is_daemon here prevents us from eventually calling
 882                  * the open_sockets_inetd()
 883                  */
 884
 885                 is_daemon = True;
 886         }
 887
 888         if (is_daemon && !interactive) {
 889                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 890                 become_daemon(Fork, no_process_group);
 891         }
 892
 893 #if HAVE_SETPGID
 894         /*
 895          * If we're interactive we want to set our own process group for
 896          * signal management.
 897          */
 898         if (interactive && !no_process_group)
 899                 setpgid( (pid_t)0, (pid_t)0);
 900 #endif
 901
 902         if (!directory_exist(lp_lockdir(), NULL))
 903                 mkdir(lp_lockdir(), 0755);
 904
 905         if (is_daemon)
 906                 pidfile_create("smbd");
 907
 908         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 909         if (!message_init())
 910                 exit(1);
 911
 912         /* Initialize our global sam sid first -- quite a lot of the other
 913          * initialization routines further down depend on it.
 914          */
 915
 916         /* Initialise the password backed before the global_sam_sid
 917            to ensure that we fetch from ldap before we make a domain sid up */
 918
 919         if(!initialize_password_db(False))
 920                 exit(1);
 921
 922         /* Fail gracefully if we can't open secrets.tdb */
 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 }