source/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 static int am_parent = 1;
  26
  27 /* the last message the was processed */
  28 int last_message = -1;
  29
  30 /* a useful macro to debug the last message processed */
  31 #define LAST_MESSAGE() smb_fn_name(last_message)
  32
  33 extern pstring user_socket_options;
  34 extern SIG_ATOMIC_T got_sig_term;
  35 extern SIG_ATOMIC_T reload_after_sighup;
  36
  37 #ifdef WITH_DFS
  38 extern int dcelogin_atmost_once;
  39 #endif /* WITH_DFS */
  40
  41 /* really we should have a top level context structure that has the
  42    client file descriptor as an element. That would require a major rewrite :(
  43
  44    the following 2 functions are an alternative - they make the file
  45    descriptor private to smbd
  46  */
  47 static int server_fd = -1;
  48
  49 int smbd_server_fd(void)
  50 {
  51         return server_fd;
  52 }
  53
  54 static void smbd_set_server_fd(int fd)
  55 {
  56         server_fd = fd;
  57         client_setfd(fd);
  58 }
  59
  60 /****************************************************************************
  61  Terminate signal.
  62 ****************************************************************************/
  63
  64 static void sig_term(void)
  65 {
  66         got_sig_term = 1;
  67         sys_select_signal();
  68 }
  69
  70 /****************************************************************************
  71  Catch a sighup.
  72 ****************************************************************************/
  73
  74 static void sig_hup(int sig)
  75 {
  76         reload_after_sighup = 1;
  77         sys_select_signal();
  78 }
  79
  80 /****************************************************************************
  81   Send a SIGTERM to our process group.
  82 *****************************************************************************/
  83
  84 static void  killkids(void)
  85 {
  86         if(am_parent) kill(0,SIGTERM);
  87 }
  88
  89 /****************************************************************************
  90  Process a sam sync message - not sure whether to do this here or
  91  somewhere else.
  92 ****************************************************************************/
  93
  94 static void msg_sam_sync(int UNUSED(msg_type), pid_t UNUSED(pid),
  95                          void *UNUSED(buf), size_t UNUSED(len))
  96 {
  97         DEBUG(10, ("** sam sync message received, ignoring\n"));
  98 }
  99
 100 /****************************************************************************
 101  Process a sam sync replicate message - not sure whether to do this here or
 102  somewhere else.
 103 ****************************************************************************/
 104
 105 static void msg_sam_repl(int msg_type, pid_t pid, void *buf, size_t len)
 106 {
 107         uint32 low_serial;
 108
 109         if (len != sizeof(uint32))
 110                 return;
 111
 112         low_serial = *((uint32 *)buf);
 113
 114         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 115                   low_serial));
 116 }
 117
 118 /****************************************************************************
 119  Open the socket communication - inetd.
 120 ****************************************************************************/
 121
 122 static BOOL open_sockets_inetd(void)
 123 {
 124         /* Started from inetd. fd 0 is the socket. */
 125         /* We will abort gracefully when the client or remote system
 126            goes away */
 127         smbd_set_server_fd(dup(0));
 128
 129         /* close our standard file descriptors */
 130         close_low_fds(False); /* Don't close stderr */
 131
 132         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 133         set_socket_options(smbd_server_fd(), user_socket_options);
 134
 135         return True;
 136 }
 137
 138 static void msg_exit_server(int msg_type, pid_t src, void *buf, size_t len)
 139 {
 140         exit_server("Got a SHUTDOWN message");
 141 }
 142
 143
 144 /****************************************************************************
 145  Have we reached the process limit ?
 146 ****************************************************************************/
 147
 148 static BOOL allowable_number_of_smbd_processes(void)
 149 {
 150         int max_processes = lp_max_smbd_processes();
 151
 152         if (!max_processes)
 153                 return True;
 154
 155         {
 156                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 157                 int32 val;
 158                 if (!tdb) {
 159                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 160                         return False;
 161                 }
 162
 163                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 164                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 165                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 166                                 tdb_errorstr(tdb) ));
 167                         return False;
 168                 }
 169                 if (val > max_processes) {
 170                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 171                                 val, max_processes ));
 172                         return False;
 173                 }
 174         }
 175         return True;
 176 }
 177
 178 /****************************************************************************
 179  Open the socket communication.
 180 ****************************************************************************/
 181
 182 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 183 {
 184         int num_interfaces = iface_count();
 185         int num_sockets = 0;
 186         int fd_listenset[FD_SETSIZE];
 187         fd_set listen_set;
 188         int s;
 189         int maxfd = 0;
 190         int i;
 191         char *ports;
 192
 193         if (!is_daemon) {
 194                 return open_sockets_inetd();
 195         }
 196
 197
 198 #ifdef HAVE_ATEXIT
 199         {
 200                 static int atexit_set;
 201                 if(atexit_set == 0) {
 202                         atexit_set=1;
 203                         atexit(killkids);
 204                 }
 205         }
 206 #endif
 207
 208         /* Stop zombies */
 209         CatchChild();
 210
 211         FD_ZERO(&listen_set);
 212
 213         /* use a reasonable default set of ports - listing on 445 and 139 */
 214         if (!smb_ports) {
 215                 ports = lp_smb_ports();
 216                 if (!ports || !*ports) {
 217                         ports = smb_xstrdup(SMB_PORTS);
 218                 } else {
 219                         ports = smb_xstrdup(ports);
 220                 }
 221         } else {
 222                 ports = smb_xstrdup(smb_ports);
 223         }
 224
 225         if (lp_interfaces() && lp_bind_interfaces_only()) {
 226                 /* We have been given an interfaces line, and been
 227                    told to only bind to those interfaces. Create a
 228                    socket per interface and bind to only these.
 229                 */
 230
 231                 /* Now open a listen socket for each of the
 232                    interfaces. */
 233                 for(i = 0; i < num_interfaces; i++) {
 234                         struct in_addr *ifip = iface_n_ip(i);
 235                         fstring tok;
 236                         const char *ptr;
 237
 238                         if(ifip == NULL) {
 239                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 240                                 continue;
 241                         }
 242
 243                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 244                                 unsigned port = atoi(tok);
 245                                 if (port == 0) {
 246                                         continue;
 247                                 }
 248                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 249                                 if(s == -1)
 250                                         return False;
 251
 252                                 /* ready to listen */
 253                                 set_socket_options(s,"SO_KEEPALIVE");
 254                                 set_socket_options(s,user_socket_options);
 255
 256                                 /* Set server socket to non-blocking for the accept. */
 257                                 set_blocking(s,False);
 258
 259                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 260                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 261                                         close(s);
 262                                         return False;
 263                                 }
 264                                 FD_SET(s,&listen_set);
 265                                 maxfd = MAX( maxfd, s);
 266
 267                                 num_sockets++;
 268                                 if (num_sockets >= FD_SETSIZE) {
 269                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 270                                         return False;
 271                                 }
 272                         }
 273                 }
 274         } else {
 275                 /* Just bind to 0.0.0.0 - accept connections
 276                    from anywhere. */
 277
 278                 fstring tok;
 279                 const char *ptr;
 280
 281                 num_interfaces = 1;
 282
 283                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 284                         unsigned port = atoi(tok);
 285                         if (port == 0) continue;
 286                         /* open an incoming socket */
 287                         s = open_socket_in(SOCK_STREAM, port, 0,
 288                                            interpret_addr(lp_socket_address()),True);
 289                         if (s == -1)
 290                                 return(False);
 291
 292                         /* ready to listen */
 293                         set_socket_options(s,"SO_KEEPALIVE");
 294                         set_socket_options(s,user_socket_options);
 295
 296                         /* Set server socket to non-blocking for the accept. */
 297                         set_blocking(s,False);
 298
 299                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 300                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 301                                          strerror(errno)));
 302                                 close(s);
 303                                 return False;
 304                         }
 305
 306                         fd_listenset[num_sockets] = s;
 307                         FD_SET(s,&listen_set);
 308                         maxfd = MAX( maxfd, s);
 309
 310                         num_sockets++;
 311
 312                         if (num_sockets >= FD_SETSIZE) {
 313                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 314                                 return False;
 315                         }
 316                 }
 317         }
 318
 319         SAFE_FREE(ports);
 320
 321         /* Listen to messages */
 322
 323         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 324         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 325         message_register(MSG_SHUTDOWN, msg_exit_server);
 326
 327         /* now accept incoming connections - forking a new process
 328            for each incoming connection */
 329         DEBUG(2,("waiting for a connection\n"));
 330         while (1) {
 331                 fd_set lfds;
 332                 int num;
 333
 334                 /* Free up temporary memory from the main smbd. */
 335                 lp_talloc_free();
 336
 337                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 338                 message_dispatch();
 339
 340                 memcpy((char *)&lfds, (char *)&listen_set,
 341                        sizeof(listen_set));
 342
 343                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 344
 345                 if (num == -1 && errno == EINTR) {
 346                         if (got_sig_term) {
 347                                 exit_server("Caught TERM signal");
 348                         }
 349
 350                         /* check for sighup processing */
 351                         if (reload_after_sighup) {
 352                                 change_to_root_user();
 353                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 354                                 reload_services(False);
 355                                 reload_after_sighup = 0;
 356                         }
 357
 358                         continue;
 359                 }
 360
 361                 /* check if we need to reload services */
 362                 check_reload(time(NULL));
 363
 364                 /* Find the sockets that are read-ready -
 365                    accept on these. */
 366                 for( ; num > 0; num--) {
 367                         struct sockaddr addr;
 368                         socklen_t in_addrlen = sizeof(addr);
 369
 370                         s = -1;
 371                         for(i = 0; i < num_sockets; i++) {
 372                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 373                                         s = fd_listenset[i];
 374                                         /* Clear this so we don't look
 375                                            at it again. */
 376                                         FD_CLR(fd_listenset[i],&lfds);
 377                                         break;
 378                                 }
 379                         }
 380
 381                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 382
 383                         if (smbd_server_fd() == -1 && errno == EINTR)
 384                                 continue;
 385
 386                         if (smbd_server_fd() == -1) {
 387                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 388                                          strerror(errno)));
 389                                 continue;
 390                         }
 391
 392                         /* Ensure child is set to blocking mode */
 393                         set_blocking(smbd_server_fd(),True);
 394
 395                         if (smbd_server_fd() != -1 && interactive)
 396                                 return True;
 397
 398                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 399                                 /* Child code ... */
 400
 401                                 /* close the listening socket(s) */
 402                                 for(i = 0; i < num_sockets; i++)
 403                                         close(fd_listenset[i]);
 404
 405                                 /* close our standard file
 406                                    descriptors */
 407                                 close_low_fds(False);
 408                                 am_parent = 0;
 409
 410                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 411                                 set_socket_options(smbd_server_fd(),user_socket_options);
 412
 413                                 /* this is needed so that we get decent entries
 414                                    in smbstatus for port 445 connects */
 415                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 416
 417                                 /* Reset the state of the random
 418                                  * number generation system, so
 419                                  * children do not get the same random
 420                                  * numbers as each other */
 421
 422                                 set_need_random_reseed();
 423                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 424                                 if (tdb_reopen_all() == -1) {
 425                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 426                                         smb_panic("tdb_reopen_all failed.");
 427                                 }
 428
 429                                 return True;
 430                         }
 431                         /* The parent doesn't need this socket */
 432                         close(smbd_server_fd());
 433
 434                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 435                                 Clear the closed fd info out of server_fd --
 436                                 and more importantly, out of client_fd in
 437                                 util_sock.c, to avoid a possible
 438                                 getpeername failure if we reopen the logs
 439                                 and use %I in the filename.
 440                         */
 441
 442                         smbd_set_server_fd(-1);
 443
 444                         /* Force parent to check log size after
 445                          * spawning child.  Fix from
 446                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 447                          * parent smbd will log to logserver.smb.  It
 448                          * writes only two messages for each child
 449                          * started/finished. But each child writes,
 450                          * say, 50 messages also in logserver.smb,
 451                          * begining with the debug_count of the
 452                          * parent, before the child opens its own log
 453                          * file logserver.client. In a worst case
 454                          * scenario the size of logserver.smb would be
 455                          * checked after about 50*50=2500 messages
 456                          * (ca. 100kb).
 457                          * */
 458                         force_check_log_size();
 459
 460                 } /* end for num */
 461         } /* end while 1 */
 462
 463 /* NOTREACHED   return True; */
 464 }
 465
 466 /****************************************************************************
 467  Reload printers
 468 **************************************************************************/
 469 void reload_printers(void)
 470 {
 471         int snum;
 472         int n_services = lp_numservices();
 473         int pnum = lp_servicenumber(PRINTERS_NAME);
 474         const char *pname;
 475
 476         pcap_cache_reload();
 477
 478         /* remove stale printers */
 479         for (snum = 0; snum < n_services; snum++) {
 480                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 481                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 482                                       lp_autoloaded(snum)))
 483                         continue;
 484
 485                 pname = lp_printername(snum);
 486                 if (!pcap_printername_ok(pname)) {
 487                         DEBUG(3, ("removing stale printer %s\n", pname));
 488
 489                         if (is_printer_published(NULL, snum, NULL))
 490                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 491                         del_a_printer(pname);
 492                         lp_killservice(snum);
 493                 }
 494         }
 495
 496         load_printers();
 497 }
 498
 499 /****************************************************************************
 500  Reload the services file.
 501 **************************************************************************/
 502
 503 BOOL reload_services(BOOL test)
 504 {
 505         BOOL ret;
 506
 507         if (lp_loaded()) {
 508                 pstring fname;
 509                 pstrcpy(fname,lp_configfile());
 510                 if (file_exist(fname, NULL) &&
 511                     !strcsequal(fname, dyn_CONFIGFILE)) {
 512                         pstrcpy(dyn_CONFIGFILE, fname);
 513                         test = False;
 514                 }
 515         }
 516
 517         reopen_logs();
 518
 519         if (test && !lp_file_list_changed())
 520                 return(True);
 521
 522         lp_killunused(conn_snum_used);
 523
 524         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 525
 526         reload_printers();
 527
 528         /* perhaps the config filename is now set */
 529         if (!test)
 530                 reload_services(True);
 531
 532         reopen_logs();
 533
 534         load_interfaces();
 535
 536         if (smbd_server_fd() != -1) {
 537                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 538                 set_socket_options(smbd_server_fd(), user_socket_options);
 539         }
 540
 541         mangle_reset_cache();
 542         reset_stat_cache();
 543
 544         /* this forces service parameters to be flushed */
 545         set_current_service(NULL,0,True);
 546
 547         return(ret);
 548 }
 549
 550
 551 #if DUMP_CORE
 552 /*******************************************************************
 553 prepare to dump a core file - carefully!
 554 ********************************************************************/
 555 static BOOL dump_core(void)
 556 {
 557         char *p;
 558         pstring dname;
 559
 560         pstrcpy(dname,lp_logfile());
 561         if ((p=strrchr_m(dname,'/'))) *p=0;
 562         pstrcat(dname,"/corefiles");
 563         mkdir(dname,0700);
 564         sys_chown(dname,getuid(),getgid());
 565         chmod(dname,0700);
 566         if (chdir(dname)) return(False);
 567         umask(~(0700));
 568
 569 #ifdef HAVE_GETRLIMIT
 570 #ifdef RLIMIT_CORE
 571         {
 572                 struct rlimit rlp;
 573                 getrlimit(RLIMIT_CORE, &rlp);
 574                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 575                 setrlimit(RLIMIT_CORE, &rlp);
 576                 getrlimit(RLIMIT_CORE, &rlp);
 577                 DEBUG(3,("Core limits now %d %d\n",
 578                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 579         }
 580 #endif
 581 #endif
 582
 583
 584         DEBUG(0,("Dumping core in %s\n", dname));
 585         /* Ensure we don't have a signal handler for abort. */
 586 #ifdef SIGABRT
 587         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 588 #endif
 589         abort();
 590         return(True);
 591 }
 592 #endif
 593
 594 /****************************************************************************
 595  Exit the server.
 596 ****************************************************************************/
 597
 598 void exit_server(const char *reason)
 599 {
 600         static int firsttime=1;
 601         extern char *last_inbuf;
 602         extern struct auth_context *negprot_global_auth_context;
 603
 604         if (!firsttime)
 605                 exit(0);
 606         firsttime = 0;
 607
 608         change_to_root_user();
 609         DEBUG(2,("Closing connections\n"));
 610
 611         if (negprot_global_auth_context) {
 612                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 613         }
 614
 615         conn_close_all();
 616
 617         invalidate_all_vuids();
 618
 619         print_notify_send_messages(3); /* 3 second timeout. */
 620
 621         /* run all registered exit events */
 622         smb_run_exit_events();
 623
 624         /* delete our entry in the connections database. */
 625         yield_connection(NULL,"");
 626
 627         respond_to_all_remaining_local_messages();
 628         decrement_smbd_process_count();
 629
 630 #ifdef WITH_DFS
 631         if (dcelogin_atmost_once) {
 632                 dfs_unlogin();
 633         }
 634 #endif
 635
 636         if (!reason) {
 637                 int oldlevel = DEBUGLEVEL;
 638                 DEBUGLEVEL = 10;
 639                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 640                 if (last_inbuf)
 641                         show_msg(last_inbuf);
 642                 DEBUGLEVEL = oldlevel;
 643                 DEBUG(0,("===============================================================\n"));
 644 #if DUMP_CORE
 645                 if (dump_core()) return;
 646 #endif
 647         }
 648
 649         locking_end();
 650         printing_end();
 651
 652         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 653         exit(0);
 654 }
 655
 656 /****************************************************************************
 657  Initialise connect, service and file structs.
 658 ****************************************************************************/
 659
 660 static BOOL init_structs(void )
 661 {
 662         /*
 663          * Set the machine NETBIOS name if not already
 664          * set from the config file.
 665          */
 666
 667         if (!init_names())
 668                 return False;
 669
 670         conn_init();
 671
 672         file_init();
 673
 674         /* for RPC pipes */
 675         init_rpc_pipe_hnd();
 676
 677         init_dptrs();
 678
 679         secrets_init();
 680
 681         return True;
 682 }
 683
 684 /****************************************************************************
 685  main program.
 686 ****************************************************************************/
 687
 688 /* Declare prototype for build_options() to avoid having to run it through
 689    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 690    prototype generation system is too complicated. */
 691
 692 void build_options(BOOL screen);
 693
 694  int main(int argc,const char *argv[])
 695 {
 696         /* shall I run as a daemon */
 697         static BOOL is_daemon = False;
 698         static BOOL interactive = False;
 699         static BOOL Fork = True;
 700         static BOOL log_stdout = False;
 701         static char *ports = NULL;
 702         int opt;
 703         poptContext pc;
 704
 705         struct poptOption long_options[] = {
 706                 POPT_AUTOHELP
 707         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 708         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 709         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 710         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 711         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 712         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 713         POPT_COMMON_SAMBA
 714         { NULL }
 715         };
 716
 717 #ifdef HAVE_SET_AUTH_PARAMETERS
 718         set_auth_parameters(argc,argv);
 719 #endif
 720
 721         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 722
 723         while((opt = poptGetNextOpt(pc)) != -1) {
 724                 switch (opt)  {
 725                 case 'b':
 726                         build_options(True); /* Display output to screen as well as debug */
 727                         exit(0);
 728                         break;
 729                 }
 730         }
 731
 732         poptFreeContext(pc);
 733
 734 #ifdef HAVE_SETLUID
 735         /* needed for SecureWare on SCO */
 736         setluid(0);
 737 #endif
 738
 739         sec_init();
 740
 741         load_case_tables();
 742
 743         set_remote_machine_name("smbd", False);
 744
 745         if (interactive) {
 746                 Fork = False;
 747                 log_stdout = True;
 748         }
 749
 750         if (log_stdout && Fork) {
 751                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 752                 exit(1);
 753         }
 754
 755         setup_logging(argv[0],log_stdout);
 756
 757         /* we want to re-seed early to prevent time delays causing
 758            client problems at a later date. (tridge) */
 759         generate_random_buffer(NULL, 0);
 760
 761         /* make absolutely sure we run as root - to handle cases where people
 762            are crazy enough to have it setuid */
 763
 764         gain_root_privilege();
 765         gain_root_group_privilege();
 766
 767         fault_setup((void (*)(void *))exit_server);
 768         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 769         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 770
 771         /* we are never interested in SIGPIPE */
 772         BlockSignals(True,SIGPIPE);
 773
 774 #if defined(SIGFPE)
 775         /* we are never interested in SIGFPE */
 776         BlockSignals(True,SIGFPE);
 777 #endif
 778
 779 #if defined(SIGUSR2)
 780         /* We are no longer interested in USR2 */
 781         BlockSignals(True,SIGUSR2);
 782 #endif
 783
 784         /* POSIX demands that signals are inherited. If the invoking process has
 785          * these signals masked, we will have problems, as we won't recieve them. */
 786         BlockSignals(False, SIGHUP);
 787         BlockSignals(False, SIGUSR1);
 788         BlockSignals(False, SIGTERM);
 789
 790         /* we want total control over the permissions on created files,
 791            so set our umask to 0 */
 792         umask(0);
 793
 794         init_sec_ctx();
 795
 796         reopen_logs();
 797
 798         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 799         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2004\n"));
 800
 801         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 802                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 803
 804         /* Output the build options to the debug log */
 805         build_options(False);
 806
 807         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 808                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 809                 exit(1);
 810         }
 811
 812         /*
 813          * Do this before reload_services.
 814          */
 815
 816         if (!reload_services(False))
 817                 return(-1);
 818
 819         init_structs();
 820
 821         if (!init_guest_info())
 822                 return -1;
 823
 824 #ifdef WITH_PROFILE
 825         if (!profile_setup(False)) {
 826                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 827                 return -1;
 828         }
 829 #endif
 830
 831         DEBUG(3,( "loaded services\n"));
 832
 833         if (!is_daemon && !is_a_socket(0)) {
 834                 if (!interactive)
 835                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 836
 837                 /*
 838                  * Setting is_daemon here prevents us from eventually calling
 839                  * the open_sockets_inetd()
 840                  */
 841
 842                 is_daemon = True;
 843         }
 844
 845         if (is_daemon && !interactive) {
 846                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 847                 become_daemon(Fork);
 848         }
 849
 850 #if HAVE_SETPGID
 851         /*
 852          * If we're interactive we want to set our own process group for
 853          * signal management.
 854          */
 855         if (interactive)
 856                 setpgid( (pid_t)0, (pid_t)0);
 857 #endif
 858
 859         if (!directory_exist(lp_lockdir(), NULL))
 860                 mkdir(lp_lockdir(), 0755);
 861
 862         if (is_daemon)
 863                 pidfile_create("smbd");
 864
 865         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 866         if (!message_init())
 867                 exit(1);
 868
 869         if (!session_init())
 870                 exit(1);
 871
 872         if (conn_tdb_ctx() == NULL)
 873                 exit(1);
 874
 875         if (!locking_init(0))
 876                 exit(1);
 877
 878         if (!share_info_db_init())
 879                 exit(1);
 880
 881         namecache_enable();
 882
 883         if (!init_registry())
 884                 exit(1);
 885
 886         if (!print_backend_init())
 887                 exit(1);
 888
 889         /* Setup the main smbd so that we can get messages. */
 890         /* don't worry about general printing messages here */
 891
 892         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 893
 894         /* only start the background queue daemon if we are
 895            running as a daemon -- bad things will happen if
 896            smbd is launched via inetd and we fork a copy of
 897            ourselves here */
 898
 899         if ( is_daemon && !interactive )
 900                 start_background_queue();
 901
 902         if (!open_sockets_smbd(is_daemon, interactive, ports))
 903                 exit(1);
 904
 905         /*
 906          * everything after this point is run after the fork()
 907          */
 908
 909         /* Initialise the password backed before the global_sam_sid
 910            to ensure that we fetch from ldap before we make a domain sid up */
 911
 912         if(!initialize_password_db(False))
 913                 exit(1);
 914
 915         if(!get_global_sam_sid()) {
 916                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 917                 exit(1);
 918         }
 919
 920         static_init_rpc;
 921
 922         init_modules();
 923
 924         /* possibly reload the services file. */
 925         reload_services(True);
 926
 927         if (!init_account_policy()) {
 928                 DEBUG(0,("Could not open account policy tdb.\n"));
 929                 exit(1);
 930         }
 931
 932         if (*lp_rootdir()) {
 933                 if (sys_chroot(lp_rootdir()) == 0)
 934                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 935         }
 936
 937         /* Setup oplocks */
 938         if (!init_oplocks())
 939                 exit(1);
 940
 941         /* Setup change notify */
 942         if (!init_change_notify())
 943                 exit(1);
 944
 945         /* re-initialise the timezone */
 946         TimeInit();
 947
 948         /* register our message handlers */
 949         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 950
 951         smbd_process();
 952
 953         namecache_shutdown();
 954
 955         if (interactive) {
 956                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 957                 char *description = talloc_describe_all(mem_ctx);
 958
 959                 DEBUG(3, ("tallocs left:\n%s\n", description));
 960                 talloc_destroy(mem_ctx);
 961         }
 962
 963         exit_server("normal exit");
 964         return(0);
 965 }