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 #ifdef HAVE_SYS_PRCTL_H
  26 #include <sys/prctl.h>
  27 #endif
  28
  29 static int am_parent = 1;
  30
  31 /* the last message the was processed */
  32 int last_message = -1;
  33
  34 /* a useful macro to debug the last message processed */
  35 #define LAST_MESSAGE() smb_fn_name(last_message)
  36
  37 extern struct auth_context *negprot_global_auth_context;
  38 extern pstring user_socket_options;
  39 extern SIG_ATOMIC_T got_sig_term;
  40 extern SIG_ATOMIC_T reload_after_sighup;
  41
  42 #ifdef WITH_DFS
  43 extern int dcelogin_atmost_once;
  44 #endif /* WITH_DFS */
  45
  46 /* really we should have a top level context structure that has the
  47    client file descriptor as an element. That would require a major rewrite :(
  48
  49    the following 2 functions are an alternative - they make the file
  50    descriptor private to smbd
  51  */
  52 static int server_fd = -1;
  53
  54 int smbd_server_fd(void)
  55 {
  56         return server_fd;
  57 }
  58
  59 static void smbd_set_server_fd(int fd)
  60 {
  61         server_fd = fd;
  62         client_setfd(fd);
  63 }
  64
  65 /****************************************************************************
  66  Terminate signal.
  67 ****************************************************************************/
  68
  69 static void sig_term(void)
  70 {
  71         got_sig_term = 1;
  72         sys_select_signal(SIGTERM);
  73 }
  74
  75 /****************************************************************************
  76  Catch a sighup.
  77 ****************************************************************************/
  78
  79 static void sig_hup(int sig)
  80 {
  81         reload_after_sighup = 1;
  82         sys_select_signal(SIGHUP);
  83 }
  84
  85 /****************************************************************************
  86   Send a SIGTERM to our process group.
  87 *****************************************************************************/
  88
  89 static void  killkids(void)
  90 {
  91         if(am_parent) kill(0,SIGTERM);
  92 }
  93
  94 /****************************************************************************
  95  Process a sam sync message - not sure whether to do this here or
  96  somewhere else.
  97 ****************************************************************************/
  98
  99 static void msg_sam_sync(int UNUSED(msg_type), pid_t UNUSED(pid),
 100                          void *UNUSED(buf), size_t UNUSED(len))
 101 {
 102         DEBUG(10, ("** sam sync message received, ignoring\n"));
 103 }
 104
 105 /****************************************************************************
 106  Process a sam sync replicate message - not sure whether to do this here or
 107  somewhere else.
 108 ****************************************************************************/
 109
 110 static void msg_sam_repl(int msg_type, pid_t pid, void *buf, size_t len)
 111 {
 112         uint32 low_serial;
 113
 114         if (len != sizeof(uint32))
 115                 return;
 116
 117         low_serial = *((uint32 *)buf);
 118
 119         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 120                   low_serial));
 121 }
 122
 123 /****************************************************************************
 124  Open the socket communication - inetd.
 125 ****************************************************************************/
 126
 127 static BOOL open_sockets_inetd(void)
 128 {
 129         /* Started from inetd. fd 0 is the socket. */
 130         /* We will abort gracefully when the client or remote system
 131            goes away */
 132         smbd_set_server_fd(dup(0));
 133
 134         /* close our standard file descriptors */
 135         close_low_fds(False); /* Don't close stderr */
 136
 137         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 138         set_socket_options(smbd_server_fd(), user_socket_options);
 139
 140         return True;
 141 }
 142
 143 static void msg_exit_server(int msg_type, pid_t src, void *buf, size_t len)
 144 {
 145         exit_server("Got a SHUTDOWN message");
 146 }
 147
 148
 149 /****************************************************************************
 150  Have we reached the process limit ?
 151 ****************************************************************************/
 152
 153 static BOOL allowable_number_of_smbd_processes(void)
 154 {
 155         int max_processes = lp_max_smbd_processes();
 156
 157         if (!max_processes)
 158                 return True;
 159
 160         {
 161                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 162                 int32 val;
 163                 if (!tdb) {
 164                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 165                         return False;
 166                 }
 167
 168                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 169                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 170                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 171                                 tdb_errorstr(tdb) ));
 172                         return False;
 173                 }
 174                 if (val > max_processes) {
 175                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 176                                 val, max_processes ));
 177                         return False;
 178                 }
 179         }
 180         return True;
 181 }
 182
 183 /****************************************************************************
 184  Open the socket communication.
 185 ****************************************************************************/
 186
 187 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 188 {
 189         int num_interfaces = iface_count();
 190         int num_sockets = 0;
 191         int fd_listenset[FD_SETSIZE];
 192         fd_set listen_set;
 193         int s;
 194         int maxfd = 0;
 195         int i;
 196         char *ports;
 197
 198         if (!is_daemon) {
 199                 return open_sockets_inetd();
 200         }
 201
 202
 203 #ifdef HAVE_ATEXIT
 204         {
 205                 static int atexit_set;
 206                 if(atexit_set == 0) {
 207                         atexit_set=1;
 208                         atexit(killkids);
 209                 }
 210         }
 211 #endif
 212
 213         /* Stop zombies */
 214         CatchChild();
 215
 216         FD_ZERO(&listen_set);
 217
 218         /* use a reasonable default set of ports - listing on 445 and 139 */
 219         if (!smb_ports) {
 220                 ports = lp_smb_ports();
 221                 if (!ports || !*ports) {
 222                         ports = smb_xstrdup(SMB_PORTS);
 223                 } else {
 224                         ports = smb_xstrdup(ports);
 225                 }
 226         } else {
 227                 ports = smb_xstrdup(smb_ports);
 228         }
 229
 230         if (lp_interfaces() && lp_bind_interfaces_only()) {
 231                 /* We have been given an interfaces line, and been
 232                    told to only bind to those interfaces. Create a
 233                    socket per interface and bind to only these.
 234                 */
 235
 236                 /* Now open a listen socket for each of the
 237                    interfaces. */
 238                 for(i = 0; i < num_interfaces; i++) {
 239                         struct in_addr *ifip = iface_n_ip(i);
 240                         fstring tok;
 241                         const char *ptr;
 242
 243                         if(ifip == NULL) {
 244                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 245                                 continue;
 246                         }
 247
 248                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 249                                 unsigned port = atoi(tok);
 250                                 if (port == 0) {
 251                                         continue;
 252                                 }
 253                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 254                                 if(s == -1)
 255                                         return False;
 256
 257                                 /* ready to listen */
 258                                 set_socket_options(s,"SO_KEEPALIVE");
 259                                 set_socket_options(s,user_socket_options);
 260
 261                                 /* Set server socket to non-blocking for the accept. */
 262                                 set_blocking(s,False);
 263
 264                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 265                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 266                                         close(s);
 267                                         return False;
 268                                 }
 269                                 FD_SET(s,&listen_set);
 270                                 maxfd = MAX( maxfd, s);
 271
 272                                 num_sockets++;
 273                                 if (num_sockets >= FD_SETSIZE) {
 274                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 275                                         return False;
 276                                 }
 277                         }
 278                 }
 279         } else {
 280                 /* Just bind to 0.0.0.0 - accept connections
 281                    from anywhere. */
 282
 283                 fstring tok;
 284                 const char *ptr;
 285
 286                 num_interfaces = 1;
 287
 288                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 289                         unsigned port = atoi(tok);
 290                         if (port == 0) continue;
 291                         /* open an incoming socket */
 292                         s = open_socket_in(SOCK_STREAM, port, 0,
 293                                            interpret_addr(lp_socket_address()),True);
 294                         if (s == -1)
 295                                 return(False);
 296
 297                         /* ready to listen */
 298                         set_socket_options(s,"SO_KEEPALIVE");
 299                         set_socket_options(s,user_socket_options);
 300
 301                         /* Set server socket to non-blocking for the accept. */
 302                         set_blocking(s,False);
 303
 304                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 305                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 306                                          strerror(errno)));
 307                                 close(s);
 308                                 return False;
 309                         }
 310
 311                         fd_listenset[num_sockets] = s;
 312                         FD_SET(s,&listen_set);
 313                         maxfd = MAX( maxfd, s);
 314
 315                         num_sockets++;
 316
 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
 324         SAFE_FREE(ports);
 325
 326         /* Listen to messages */
 327
 328         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 329         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 330         message_register(MSG_SHUTDOWN, msg_exit_server);
 331
 332         /* now accept incoming connections - forking a new process
 333            for each incoming connection */
 334         DEBUG(2,("waiting for a connection\n"));
 335         while (1) {
 336                 fd_set lfds;
 337                 int num;
 338
 339                 /* Free up temporary memory from the main smbd. */
 340                 lp_talloc_free();
 341
 342                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 343                 message_dispatch();
 344
 345                 memcpy((char *)&lfds, (char *)&listen_set,
 346                        sizeof(listen_set));
 347
 348                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 349
 350                 if (num == -1 && errno == EINTR) {
 351                         if (got_sig_term) {
 352                                 exit_server("Caught TERM signal");
 353                         }
 354
 355                         /* check for sighup processing */
 356                         if (reload_after_sighup) {
 357                                 change_to_root_user();
 358                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 359                                 reload_services(False);
 360                                 reload_after_sighup = 0;
 361                         }
 362
 363                         continue;
 364                 }
 365
 366                 /* check if we need to reload services */
 367                 check_reload(time(NULL));
 368
 369                 /* Find the sockets that are read-ready -
 370                    accept on these. */
 371                 for( ; num > 0; num--) {
 372                         struct sockaddr addr;
 373                         socklen_t in_addrlen = sizeof(addr);
 374
 375                         s = -1;
 376                         for(i = 0; i < num_sockets; i++) {
 377                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 378                                         s = fd_listenset[i];
 379                                         /* Clear this so we don't look
 380                                            at it again. */
 381                                         FD_CLR(fd_listenset[i],&lfds);
 382                                         break;
 383                                 }
 384                         }
 385
 386                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 387
 388                         if (smbd_server_fd() == -1 && errno == EINTR)
 389                                 continue;
 390
 391                         if (smbd_server_fd() == -1) {
 392                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 393                                          strerror(errno)));
 394                                 continue;
 395                         }
 396
 397                         /* Ensure child is set to blocking mode */
 398                         set_blocking(smbd_server_fd(),True);
 399
 400                         if (smbd_server_fd() != -1 && interactive)
 401                                 return True;
 402
 403                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 404                                 /* Child code ... */
 405
 406                                 /* close the listening socket(s) */
 407                                 for(i = 0; i < num_sockets; i++)
 408                                         close(fd_listenset[i]);
 409
 410                                 /* close our standard file
 411                                    descriptors */
 412                                 close_low_fds(False);
 413                                 am_parent = 0;
 414
 415                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 416                                 set_socket_options(smbd_server_fd(),user_socket_options);
 417
 418                                 /* this is needed so that we get decent entries
 419                                    in smbstatus for port 445 connects */
 420                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 421
 422                                 /* Reset the state of the random
 423                                  * number generation system, so
 424                                  * children do not get the same random
 425                                  * numbers as each other */
 426
 427                                 set_need_random_reseed();
 428                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 429                                 if (tdb_reopen_all() == -1) {
 430                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 431                                         smb_panic("tdb_reopen_all failed.");
 432                                 }
 433
 434                                 return True;
 435                         }
 436                         /* The parent doesn't need this socket */
 437                         close(smbd_server_fd());
 438
 439                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 440                                 Clear the closed fd info out of server_fd --
 441                                 and more importantly, out of client_fd in
 442                                 util_sock.c, to avoid a possible
 443                                 getpeername failure if we reopen the logs
 444                                 and use %I in the filename.
 445                         */
 446
 447                         smbd_set_server_fd(-1);
 448
 449                         /* Force parent to check log size after
 450                          * spawning child.  Fix from
 451                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 452                          * parent smbd will log to logserver.smb.  It
 453                          * writes only two messages for each child
 454                          * started/finished. But each child writes,
 455                          * say, 50 messages also in logserver.smb,
 456                          * begining with the debug_count of the
 457                          * parent, before the child opens its own log
 458                          * file logserver.client. In a worst case
 459                          * scenario the size of logserver.smb would be
 460                          * checked after about 50*50=2500 messages
 461                          * (ca. 100kb).
 462                          * */
 463                         force_check_log_size();
 464
 465                 } /* end for num */
 466         } /* end while 1 */
 467
 468 /* NOTREACHED   return True; */
 469 }
 470
 471 /****************************************************************************
 472  Reload printers
 473 **************************************************************************/
 474 void reload_printers(void)
 475 {
 476         int snum;
 477         int n_services = lp_numservices();
 478         int pnum = lp_servicenumber(PRINTERS_NAME);
 479         const char *pname;
 480
 481         pcap_cache_reload();
 482
 483         /* remove stale printers */
 484         for (snum = 0; snum < n_services; snum++) {
 485                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 486                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 487                                       lp_autoloaded(snum)))
 488                         continue;
 489
 490                 pname = lp_printername(snum);
 491                 if (!pcap_printername_ok(pname)) {
 492                         DEBUG(3, ("removing stale printer %s\n", pname));
 493
 494                         if (is_printer_published(NULL, snum, NULL))
 495                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 496                         del_a_printer(pname);
 497                         lp_killservice(snum);
 498                 }
 499         }
 500
 501         load_printers();
 502 }
 503
 504 /****************************************************************************
 505  Reload the services file.
 506 **************************************************************************/
 507
 508 BOOL reload_services(BOOL test)
 509 {
 510         BOOL ret;
 511
 512         if (lp_loaded()) {
 513                 pstring fname;
 514                 pstrcpy(fname,lp_configfile());
 515                 if (file_exist(fname, NULL) &&
 516                     !strcsequal(fname, dyn_CONFIGFILE)) {
 517                         pstrcpy(dyn_CONFIGFILE, fname);
 518                         test = False;
 519                 }
 520         }
 521
 522         reopen_logs();
 523
 524         if (test && !lp_file_list_changed())
 525                 return(True);
 526
 527         lp_killunused(conn_snum_used);
 528
 529         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 530
 531         reload_printers();
 532
 533         /* perhaps the config filename is now set */
 534         if (!test)
 535                 reload_services(True);
 536
 537         reopen_logs();
 538
 539         load_interfaces();
 540
 541         if (smbd_server_fd() != -1) {
 542                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 543                 set_socket_options(smbd_server_fd(), user_socket_options);
 544         }
 545
 546         mangle_reset_cache();
 547         reset_stat_cache();
 548
 549         /* this forces service parameters to be flushed */
 550         set_current_service(NULL,0,True);
 551
 552         return(ret);
 553 }
 554
 555
 556 #if DUMP_CORE
 557 /*******************************************************************
 558 prepare to dump a core file - carefully!
 559 ********************************************************************/
 560 static BOOL dump_core(void)
 561 {
 562         char *p;
 563         pstring dname;
 564
 565         pstrcpy(dname,lp_logfile());
 566         if ((p=strrchr_m(dname,'/'))) *p=0;
 567         pstrcat(dname,"/corefiles");
 568         mkdir(dname,0700);
 569         sys_chown(dname,getuid(),getgid());
 570         chmod(dname,0700);
 571         if (chdir(dname)) return(False);
 572         umask(~(0700));
 573
 574 #ifdef HAVE_GETRLIMIT
 575 #ifdef RLIMIT_CORE
 576         {
 577                 struct rlimit rlp;
 578                 getrlimit(RLIMIT_CORE, &rlp);
 579                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 580                 setrlimit(RLIMIT_CORE, &rlp);
 581                 getrlimit(RLIMIT_CORE, &rlp);
 582                 DEBUG(3,("Core limits now %d %d\n",
 583                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 584         }
 585 #endif
 586 #endif
 587
 588
 589         DEBUG(0,("Dumping core in %s\n", dname));
 590         /* Ensure we don't have a signal handler for abort. */
 591 #ifdef SIGABRT
 592         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 593 #endif
 594         abort();
 595         return(True);
 596 }
 597 #endif
 598
 599 /****************************************************************************
 600  Exit the server.
 601 ****************************************************************************/
 602
 603 void exit_server(const char *reason)
 604 {
 605         static int firsttime=1;
 606
 607         if (!firsttime)
 608                 exit(0);
 609         firsttime = 0;
 610
 611         change_to_root_user();
 612         DEBUG(2,("Closing connections\n"));
 613
 614         if (negprot_global_auth_context) {
 615                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 616         }
 617
 618         conn_close_all();
 619
 620         invalidate_all_vuids();
 621
 622         print_notify_send_messages(3); /* 3 second timeout. */
 623
 624         /* run all registered exit events */
 625         smb_run_exit_events();
 626
 627         /* delete our entry in the connections database. */
 628         yield_connection(NULL,"");
 629
 630         respond_to_all_remaining_local_messages();
 631         decrement_smbd_process_count();
 632
 633 #ifdef WITH_DFS
 634         if (dcelogin_atmost_once) {
 635                 dfs_unlogin();
 636         }
 637 #endif
 638
 639         if (!reason) {
 640                 int oldlevel = DEBUGLEVEL;
 641                 char *last_inbuf = get_InBuffer();
 642                 DEBUGLEVEL = 10;
 643                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 644                 if (last_inbuf)
 645                         show_msg(last_inbuf);
 646                 DEBUGLEVEL = oldlevel;
 647                 DEBUG(0,("===============================================================\n"));
 648 #if DUMP_CORE
 649                 if (dump_core()) return;
 650 #endif
 651         }
 652
 653         locking_end();
 654         printing_end();
 655
 656         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 657         exit(0);
 658 }
 659
 660 /****************************************************************************
 661  Initialise connect, service and file structs.
 662 ****************************************************************************/
 663
 664 static BOOL init_structs(void )
 665 {
 666         /*
 667          * Set the machine NETBIOS name if not already
 668          * set from the config file.
 669          */
 670
 671         if (!init_names())
 672                 return False;
 673
 674         conn_init();
 675
 676         file_init();
 677
 678         /* for RPC pipes */
 679         init_rpc_pipe_hnd();
 680
 681         init_dptrs();
 682
 683         secrets_init();
 684
 685         return True;
 686 }
 687
 688 /****************************************************************************
 689  main program.
 690 ****************************************************************************/
 691
 692 /* Declare prototype for build_options() to avoid having to run it through
 693    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 694    prototype generation system is too complicated. */
 695
 696 void build_options(BOOL screen);
 697
 698  int main(int argc,const char *argv[])
 699 {
 700         /* shall I run as a daemon */
 701         static BOOL is_daemon = False;
 702         static BOOL interactive = False;
 703         static BOOL Fork = True;
 704         static BOOL log_stdout = False;
 705         static char *ports = NULL;
 706         int opt;
 707         poptContext pc;
 708
 709         struct poptOption long_options[] = {
 710                 POPT_AUTOHELP
 711         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 712         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 713         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 714         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 715         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 716         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 717         POPT_COMMON_SAMBA
 718         { NULL }
 719         };
 720
 721 #ifdef HAVE_SET_AUTH_PARAMETERS
 722         set_auth_parameters(argc,argv);
 723 #endif
 724
 725         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 726
 727         while((opt = poptGetNextOpt(pc)) != -1) {
 728                 switch (opt)  {
 729                 case 'b':
 730                         build_options(True); /* Display output to screen as well as debug */
 731                         exit(0);
 732                         break;
 733                 }
 734         }
 735
 736         poptFreeContext(pc);
 737
 738 #ifdef HAVE_SETLUID
 739         /* needed for SecureWare on SCO */
 740         setluid(0);
 741 #endif
 742
 743         sec_init();
 744
 745         load_case_tables();
 746
 747         set_remote_machine_name("smbd", False);
 748
 749         if (interactive) {
 750                 Fork = False;
 751                 log_stdout = True;
 752         }
 753
 754         if (interactive && (DEBUGLEVEL >= 9)) {
 755                 talloc_enable_leak_report();
 756         }
 757
 758         if (log_stdout && Fork) {
 759                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 760                 exit(1);
 761         }
 762
 763         setup_logging(argv[0],log_stdout);
 764
 765         /* we want to re-seed early to prevent time delays causing
 766            client problems at a later date. (tridge) */
 767         generate_random_buffer(NULL, 0);
 768
 769         /* make absolutely sure we run as root - to handle cases where people
 770            are crazy enough to have it setuid */
 771
 772         gain_root_privilege();
 773         gain_root_group_privilege();
 774
 775         fault_setup((void (*)(void *))exit_server);
 776         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 777         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 778
 779         /* we are never interested in SIGPIPE */
 780         BlockSignals(True,SIGPIPE);
 781
 782 #if defined(SIGFPE)
 783         /* we are never interested in SIGFPE */
 784         BlockSignals(True,SIGFPE);
 785 #endif
 786
 787 #if defined(SIGUSR2)
 788         /* We are no longer interested in USR2 */
 789         BlockSignals(True,SIGUSR2);
 790 #endif
 791
 792         /* POSIX demands that signals are inherited. If the invoking process has
 793          * these signals masked, we will have problems, as we won't recieve them. */
 794         BlockSignals(False, SIGHUP);
 795         BlockSignals(False, SIGUSR1);
 796         BlockSignals(False, SIGTERM);
 797
 798         /* we want total control over the permissions on created files,
 799            so set our umask to 0 */
 800         umask(0);
 801
 802         init_sec_ctx();
 803
 804         reopen_logs();
 805
 806         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 807         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2004\n"));
 808
 809         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 810                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 811
 812         /* Output the build options to the debug log */
 813         build_options(False);
 814
 815         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 816                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 817                 exit(1);
 818         }
 819
 820         /*
 821          * Do this before reload_services.
 822          */
 823
 824         if (!reload_services(False))
 825                 return(-1);
 826
 827         init_structs();
 828
 829         if (!init_guest_info())
 830                 return -1;
 831
 832 #ifdef WITH_PROFILE
 833         if (!profile_setup(False)) {
 834                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 835                 return -1;
 836         }
 837 #endif
 838
 839         DEBUG(3,( "loaded services\n"));
 840
 841         if (!is_daemon && !is_a_socket(0)) {
 842                 if (!interactive)
 843                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 844
 845                 /*
 846                  * Setting is_daemon here prevents us from eventually calling
 847                  * the open_sockets_inetd()
 848                  */
 849
 850                 is_daemon = True;
 851         }
 852
 853         if (is_daemon && !interactive) {
 854                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 855                 become_daemon(Fork);
 856         }
 857
 858 #if HAVE_SETPGID
 859         /*
 860          * If we're interactive we want to set our own process group for
 861          * signal management.
 862          */
 863         if (interactive)
 864                 setpgid( (pid_t)0, (pid_t)0);
 865 #endif
 866
 867         if (!directory_exist(lp_lockdir(), NULL))
 868                 mkdir(lp_lockdir(), 0755);
 869
 870         if (is_daemon)
 871                 pidfile_create("smbd");
 872
 873         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 874         if (!message_init())
 875                 exit(1);
 876
 877         if (!session_init())
 878                 exit(1);
 879
 880         if (conn_tdb_ctx() == NULL)
 881                 exit(1);
 882
 883         if (!locking_init(0))
 884                 exit(1);
 885
 886         if (!share_info_db_init())
 887                 exit(1);
 888
 889         namecache_enable();
 890
 891         if (!init_registry())
 892                 exit(1);
 893
 894 #if 0
 895         if (!init_svcctl_db())
 896                 exit(1);
 897 #endif
 898
 899         if (!print_backend_init())
 900                 exit(1);
 901
 902         /* Setup the main smbd so that we can get messages. */
 903         /* don't worry about general printing messages here */
 904
 905         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 906
 907         /* only start the background queue daemon if we are
 908            running as a daemon -- bad things will happen if
 909            smbd is launched via inetd and we fork a copy of
 910            ourselves here */
 911
 912         if ( is_daemon && !interactive )
 913                 start_background_queue();
 914
 915         if (!open_sockets_smbd(is_daemon, interactive, ports))
 916                 exit(1);
 917
 918         /*
 919          * everything after this point is run after the fork()
 920          */
 921
 922 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
 923         /* On Linux we lose the ability to dump core when we change our user
 924          * ID. We know how to dump core safely, so let's make sure we have our
 925          * dumpable flag set.
 926          */
 927         prctl(PR_SET_DUMPABLE, 1);
 928 #endif
 929
 930         /* Initialise the password backed before the global_sam_sid
 931            to ensure that we fetch from ldap before we make a domain sid up */
 932
 933         if(!initialize_password_db(False))
 934                 exit(1);
 935
 936         if(!get_global_sam_sid()) {
 937                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 938                 exit(1);
 939         }
 940
 941         static_init_rpc;
 942
 943         init_modules();
 944
 945         /* possibly reload the services file. */
 946         reload_services(True);
 947
 948         if (!init_account_policy()) {
 949                 DEBUG(0,("Could not open account policy tdb.\n"));
 950                 exit(1);
 951         }
 952
 953         if (*lp_rootdir()) {
 954                 if (sys_chroot(lp_rootdir()) == 0)
 955                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 956         }
 957
 958         /* Setup oplocks */
 959         if (!init_oplocks())
 960                 exit(1);
 961
 962         /* Setup change notify */
 963         if (!init_change_notify())
 964                 exit(1);
 965
 966         /* Setup aio signal handler. */
 967         initialize_async_io_handler();
 968
 969         /* re-initialise the timezone */
 970         TimeInit();
 971
 972         /* register our message handlers */
 973         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 974
 975         smbd_process();
 976
 977         namecache_shutdown();
 978
 979         exit_server("normal exit");
 980         return(0);
 981 }