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 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  Terminate signal.
  63 ****************************************************************************/
  64
  65 static void sig_term(void)
  66 {
  67         got_sig_term = 1;
  68         sys_select_signal(SIGTERM);
  69 }
  70
  71 /****************************************************************************
  72  Catch a sighup.
  73 ****************************************************************************/
  74
  75 static void sig_hup(int sig)
  76 {
  77         reload_after_sighup = 1;
  78         sys_select_signal(SIGHUP);
  79 }
  80
  81 /****************************************************************************
  82   Send a SIGTERM to our process group.
  83 *****************************************************************************/
  84
  85 static void  killkids(void)
  86 {
  87         if(am_parent) kill(0,SIGTERM);
  88 }
  89
  90 /****************************************************************************
  91  Process a sam sync message - not sure whether to do this here or
  92  somewhere else.
  93 ****************************************************************************/
  94
  95 static void msg_sam_sync(int UNUSED(msg_type), pid_t UNUSED(pid),
  96                          void *UNUSED(buf), size_t UNUSED(len))
  97 {
  98         DEBUG(10, ("** sam sync message received, ignoring\n"));
  99 }
 100
 101 /****************************************************************************
 102  Process a sam sync replicate message - not sure whether to do this here or
 103  somewhere else.
 104 ****************************************************************************/
 105
 106 static void msg_sam_repl(int msg_type, pid_t pid, void *buf, size_t len)
 107 {
 108         uint32 low_serial;
 109
 110         if (len != sizeof(uint32))
 111                 return;
 112
 113         low_serial = *((uint32 *)buf);
 114
 115         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 116                   low_serial));
 117 }
 118
 119 /****************************************************************************
 120  Open the socket communication - inetd.
 121 ****************************************************************************/
 122
 123 static BOOL open_sockets_inetd(void)
 124 {
 125         /* Started from inetd. fd 0 is the socket. */
 126         /* We will abort gracefully when the client or remote system
 127            goes away */
 128         smbd_set_server_fd(dup(0));
 129
 130         /* close our standard file descriptors */
 131         close_low_fds(False); /* Don't close stderr */
 132
 133         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 134         set_socket_options(smbd_server_fd(), user_socket_options);
 135
 136         return True;
 137 }
 138
 139 static void msg_exit_server(int msg_type, pid_t src, void *buf, size_t len)
 140 {
 141         exit_server("Got a SHUTDOWN message");
 142 }
 143
 144
 145 /****************************************************************************
 146  Have we reached the process limit ?
 147 ****************************************************************************/
 148
 149 static BOOL allowable_number_of_smbd_processes(void)
 150 {
 151         int max_processes = lp_max_smbd_processes();
 152
 153         if (!max_processes)
 154                 return True;
 155
 156         {
 157                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 158                 int32 val;
 159                 if (!tdb) {
 160                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 161                         return False;
 162                 }
 163
 164                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 165                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 166                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 167                                 tdb_errorstr(tdb) ));
 168                         return False;
 169                 }
 170                 if (val > max_processes) {
 171                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 172                                 val, max_processes ));
 173                         return False;
 174                 }
 175         }
 176         return True;
 177 }
 178
 179 /****************************************************************************
 180  Open the socket communication.
 181 ****************************************************************************/
 182
 183 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 184 {
 185         int num_interfaces = iface_count();
 186         int num_sockets = 0;
 187         int fd_listenset[FD_SETSIZE];
 188         fd_set listen_set;
 189         int s;
 190         int maxfd = 0;
 191         int i;
 192         char *ports;
 193
 194         if (!is_daemon) {
 195                 return open_sockets_inetd();
 196         }
 197
 198
 199 #ifdef HAVE_ATEXIT
 200         {
 201                 static int atexit_set;
 202                 if(atexit_set == 0) {
 203                         atexit_set=1;
 204                         atexit(killkids);
 205                 }
 206         }
 207 #endif
 208
 209         /* Stop zombies */
 210         CatchChild();
 211
 212         FD_ZERO(&listen_set);
 213
 214         /* use a reasonable default set of ports - listing on 445 and 139 */
 215         if (!smb_ports) {
 216                 ports = lp_smb_ports();
 217                 if (!ports || !*ports) {
 218                         ports = smb_xstrdup(SMB_PORTS);
 219                 } else {
 220                         ports = smb_xstrdup(ports);
 221                 }
 222         } else {
 223                 ports = smb_xstrdup(smb_ports);
 224         }
 225
 226         if (lp_interfaces() && lp_bind_interfaces_only()) {
 227                 /* We have been given an interfaces line, and been
 228                    told to only bind to those interfaces. Create a
 229                    socket per interface and bind to only these.
 230                 */
 231
 232                 /* Now open a listen socket for each of the
 233                    interfaces. */
 234                 for(i = 0; i < num_interfaces; i++) {
 235                         struct in_addr *ifip = iface_n_ip(i);
 236                         fstring tok;
 237                         const char *ptr;
 238
 239                         if(ifip == NULL) {
 240                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 241                                 continue;
 242                         }
 243
 244                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 245                                 unsigned port = atoi(tok);
 246                                 if (port == 0) {
 247                                         continue;
 248                                 }
 249                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 250                                 if(s == -1)
 251                                         return False;
 252
 253                                 /* ready to listen */
 254                                 set_socket_options(s,"SO_KEEPALIVE");
 255                                 set_socket_options(s,user_socket_options);
 256
 257                                 /* Set server socket to non-blocking for the accept. */
 258                                 set_blocking(s,False);
 259
 260                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 261                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 262                                         close(s);
 263                                         return False;
 264                                 }
 265                                 FD_SET(s,&listen_set);
 266                                 maxfd = MAX( maxfd, s);
 267
 268                                 num_sockets++;
 269                                 if (num_sockets >= FD_SETSIZE) {
 270                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 271                                         return False;
 272                                 }
 273                         }
 274                 }
 275         } else {
 276                 /* Just bind to 0.0.0.0 - accept connections
 277                    from anywhere. */
 278
 279                 fstring tok;
 280                 const char *ptr;
 281
 282                 num_interfaces = 1;
 283
 284                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 285                         unsigned port = atoi(tok);
 286                         if (port == 0) continue;
 287                         /* open an incoming socket */
 288                         s = open_socket_in(SOCK_STREAM, port, 0,
 289                                            interpret_addr(lp_socket_address()),True);
 290                         if (s == -1)
 291                                 return(False);
 292
 293                         /* ready to listen */
 294                         set_socket_options(s,"SO_KEEPALIVE");
 295                         set_socket_options(s,user_socket_options);
 296
 297                         /* Set server socket to non-blocking for the accept. */
 298                         set_blocking(s,False);
 299
 300                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 301                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 302                                          strerror(errno)));
 303                                 close(s);
 304                                 return False;
 305                         }
 306
 307                         fd_listenset[num_sockets] = s;
 308                         FD_SET(s,&listen_set);
 309                         maxfd = MAX( maxfd, s);
 310
 311                         num_sockets++;
 312
 313                         if (num_sockets >= FD_SETSIZE) {
 314                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 315                                 return False;
 316                         }
 317                 }
 318         }
 319
 320         SAFE_FREE(ports);
 321
 322         /* Listen to messages */
 323
 324         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 325         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 326         message_register(MSG_SHUTDOWN, msg_exit_server);
 327
 328         /* now accept incoming connections - forking a new process
 329            for each incoming connection */
 330         DEBUG(2,("waiting for a connection\n"));
 331         while (1) {
 332                 fd_set lfds;
 333                 int num;
 334
 335                 /* Free up temporary memory from the main smbd. */
 336                 lp_talloc_free();
 337
 338                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 339                 message_dispatch();
 340
 341                 memcpy((char *)&lfds, (char *)&listen_set,
 342                        sizeof(listen_set));
 343
 344                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 345
 346                 if (num == -1 && errno == EINTR) {
 347                         if (got_sig_term) {
 348                                 exit_server("Caught TERM signal");
 349                         }
 350
 351                         /* check for sighup processing */
 352                         if (reload_after_sighup) {
 353                                 change_to_root_user();
 354                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 355                                 reload_services(False);
 356                                 reload_after_sighup = 0;
 357                         }
 358
 359                         continue;
 360                 }
 361
 362                 /* check if we need to reload services */
 363                 check_reload(time(NULL));
 364
 365                 /* Find the sockets that are read-ready -
 366                    accept on these. */
 367                 for( ; num > 0; num--) {
 368                         struct sockaddr addr;
 369                         socklen_t in_addrlen = sizeof(addr);
 370
 371                         s = -1;
 372                         for(i = 0; i < num_sockets; i++) {
 373                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 374                                         s = fd_listenset[i];
 375                                         /* Clear this so we don't look
 376                                            at it again. */
 377                                         FD_CLR(fd_listenset[i],&lfds);
 378                                         break;
 379                                 }
 380                         }
 381
 382                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 383
 384                         if (smbd_server_fd() == -1 && errno == EINTR)
 385                                 continue;
 386
 387                         if (smbd_server_fd() == -1) {
 388                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 389                                          strerror(errno)));
 390                                 continue;
 391                         }
 392
 393                         /* Ensure child is set to blocking mode */
 394                         set_blocking(smbd_server_fd(),True);
 395
 396                         if (smbd_server_fd() != -1 && interactive)
 397                                 return True;
 398
 399                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 400                                 /* Child code ... */
 401
 402                                 /* close the listening socket(s) */
 403                                 for(i = 0; i < num_sockets; i++)
 404                                         close(fd_listenset[i]);
 405
 406                                 /* close our standard file
 407                                    descriptors */
 408                                 close_low_fds(False);
 409                                 am_parent = 0;
 410
 411                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 412                                 set_socket_options(smbd_server_fd(),user_socket_options);
 413
 414                                 /* this is needed so that we get decent entries
 415                                    in smbstatus for port 445 connects */
 416                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 417
 418                                 /* Reset the state of the random
 419                                  * number generation system, so
 420                                  * children do not get the same random
 421                                  * numbers as each other */
 422
 423                                 set_need_random_reseed();
 424                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 425                                 if (tdb_reopen_all() == -1) {
 426                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 427                                         smb_panic("tdb_reopen_all failed.");
 428                                 }
 429
 430                                 return True;
 431                         }
 432                         /* The parent doesn't need this socket */
 433                         close(smbd_server_fd());
 434
 435                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 436                                 Clear the closed fd info out of server_fd --
 437                                 and more importantly, out of client_fd in
 438                                 util_sock.c, to avoid a possible
 439                                 getpeername failure if we reopen the logs
 440                                 and use %I in the filename.
 441                         */
 442
 443                         smbd_set_server_fd(-1);
 444
 445                         /* Force parent to check log size after
 446                          * spawning child.  Fix from
 447                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 448                          * parent smbd will log to logserver.smb.  It
 449                          * writes only two messages for each child
 450                          * started/finished. But each child writes,
 451                          * say, 50 messages also in logserver.smb,
 452                          * begining with the debug_count of the
 453                          * parent, before the child opens its own log
 454                          * file logserver.client. In a worst case
 455                          * scenario the size of logserver.smb would be
 456                          * checked after about 50*50=2500 messages
 457                          * (ca. 100kb).
 458                          * */
 459                         force_check_log_size();
 460
 461                 } /* end for num */
 462         } /* end while 1 */
 463
 464 /* NOTREACHED   return True; */
 465 }
 466
 467 /****************************************************************************
 468  Reload printers
 469 **************************************************************************/
 470 void reload_printers(void)
 471 {
 472         int snum;
 473         int n_services = lp_numservices();
 474         int pnum = lp_servicenumber(PRINTERS_NAME);
 475         const char *pname;
 476
 477         pcap_cache_reload();
 478
 479         /* remove stale printers */
 480         for (snum = 0; snum < n_services; snum++) {
 481                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 482                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 483                                       lp_autoloaded(snum)))
 484                         continue;
 485
 486                 pname = lp_printername(snum);
 487                 if (!pcap_printername_ok(pname)) {
 488                         DEBUG(3, ("removing stale printer %s\n", pname));
 489
 490                         if (is_printer_published(NULL, snum, NULL))
 491                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 492                         del_a_printer(pname);
 493                         lp_killservice(snum);
 494                 }
 495         }
 496
 497         load_printers();
 498 }
 499
 500 /****************************************************************************
 501  Reload the services file.
 502 **************************************************************************/
 503
 504 BOOL reload_services(BOOL test)
 505 {
 506         BOOL ret;
 507
 508         if (lp_loaded()) {
 509                 pstring fname;
 510                 pstrcpy(fname,lp_configfile());
 511                 if (file_exist(fname, NULL) &&
 512                     !strcsequal(fname, dyn_CONFIGFILE)) {
 513                         pstrcpy(dyn_CONFIGFILE, fname);
 514                         test = False;
 515                 }
 516         }
 517
 518         reopen_logs();
 519
 520         if (test && !lp_file_list_changed())
 521                 return(True);
 522
 523         lp_killunused(conn_snum_used);
 524
 525         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 526
 527         reload_printers();
 528
 529         /* perhaps the config filename is now set */
 530         if (!test)
 531                 reload_services(True);
 532
 533         reopen_logs();
 534
 535         load_interfaces();
 536
 537         if (smbd_server_fd() != -1) {
 538                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 539                 set_socket_options(smbd_server_fd(), user_socket_options);
 540         }
 541
 542         mangle_reset_cache();
 543         reset_stat_cache();
 544
 545         /* this forces service parameters to be flushed */
 546         set_current_service(NULL,0,True);
 547
 548         return(ret);
 549 }
 550
 551
 552 #if DUMP_CORE
 553 /*******************************************************************
 554 prepare to dump a core file - carefully!
 555 ********************************************************************/
 556 static BOOL dump_core(void)
 557 {
 558         char *p;
 559         pstring dname;
 560
 561         pstrcpy(dname,lp_logfile());
 562         if ((p=strrchr_m(dname,'/'))) *p=0;
 563         pstrcat(dname,"/corefiles");
 564         mkdir(dname,0700);
 565         sys_chown(dname,getuid(),getgid());
 566         chmod(dname,0700);
 567         if (chdir(dname)) return(False);
 568         umask(~(0700));
 569
 570 #ifdef HAVE_GETRLIMIT
 571 #ifdef RLIMIT_CORE
 572         {
 573                 struct rlimit rlp;
 574                 getrlimit(RLIMIT_CORE, &rlp);
 575                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 576                 setrlimit(RLIMIT_CORE, &rlp);
 577                 getrlimit(RLIMIT_CORE, &rlp);
 578                 DEBUG(3,("Core limits now %d %d\n",
 579                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 580         }
 581 #endif
 582 #endif
 583
 584
 585         DEBUG(0,("Dumping core in %s\n", dname));
 586         /* Ensure we don't have a signal handler for abort. */
 587 #ifdef SIGABRT
 588         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 589 #endif
 590         abort();
 591         return(True);
 592 }
 593 #endif
 594
 595 /****************************************************************************
 596  Exit the server.
 597 ****************************************************************************/
 598
 599 void exit_server(const char *reason)
 600 {
 601         static int firsttime=1;
 602
 603         if (!firsttime)
 604                 exit(0);
 605         firsttime = 0;
 606
 607         change_to_root_user();
 608         DEBUG(2,("Closing connections\n"));
 609
 610         if (negprot_global_auth_context) {
 611                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 612         }
 613
 614         conn_close_all();
 615
 616         invalidate_all_vuids();
 617
 618         print_notify_send_messages(3); /* 3 second timeout. */
 619
 620         /* run all registered exit events */
 621         smb_run_exit_events();
 622
 623         /* delete our entry in the connections database. */
 624         yield_connection(NULL,"");
 625
 626         respond_to_all_remaining_local_messages();
 627         decrement_smbd_process_count();
 628
 629 #ifdef WITH_DFS
 630         if (dcelogin_atmost_once) {
 631                 dfs_unlogin();
 632         }
 633 #endif
 634
 635         if (!reason) {
 636                 int oldlevel = DEBUGLEVEL;
 637                 char *last_inbuf = get_InBuffer();
 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 (interactive && (DEBUGLEVEL >= 9)) {
 751                 talloc_enable_leak_report();
 752         }
 753
 754         if (log_stdout && Fork) {
 755                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 756                 exit(1);
 757         }
 758
 759         setup_logging(argv[0],log_stdout);
 760
 761         /* we want to re-seed early to prevent time delays causing
 762            client problems at a later date. (tridge) */
 763         generate_random_buffer(NULL, 0);
 764
 765         /* make absolutely sure we run as root - to handle cases where people
 766            are crazy enough to have it setuid */
 767
 768         gain_root_privilege();
 769         gain_root_group_privilege();
 770
 771         fault_setup((void (*)(void *))exit_server);
 772         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 773         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 774
 775         /* we are never interested in SIGPIPE */
 776         BlockSignals(True,SIGPIPE);
 777
 778 #if defined(SIGFPE)
 779         /* we are never interested in SIGFPE */
 780         BlockSignals(True,SIGFPE);
 781 #endif
 782
 783 #if defined(SIGUSR2)
 784         /* We are no longer interested in USR2 */
 785         BlockSignals(True,SIGUSR2);
 786 #endif
 787
 788         /* POSIX demands that signals are inherited. If the invoking process has
 789          * these signals masked, we will have problems, as we won't recieve them. */
 790         BlockSignals(False, SIGHUP);
 791         BlockSignals(False, SIGUSR1);
 792         BlockSignals(False, SIGTERM);
 793
 794         /* we want total control over the permissions on created files,
 795            so set our umask to 0 */
 796         umask(0);
 797
 798         init_sec_ctx();
 799
 800         reopen_logs();
 801
 802         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 803         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2004\n"));
 804
 805         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 806                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 807
 808         /* Output the build options to the debug log */
 809         build_options(False);
 810
 811         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 812                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 813                 exit(1);
 814         }
 815
 816         /*
 817          * Do this before reload_services.
 818          */
 819
 820         if (!reload_services(False))
 821                 return(-1);
 822
 823         init_structs();
 824
 825         if (!init_guest_info())
 826                 return -1;
 827
 828 #ifdef WITH_PROFILE
 829         if (!profile_setup(False)) {
 830                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 831                 return -1;
 832         }
 833 #endif
 834
 835         DEBUG(3,( "loaded services\n"));
 836
 837         if (!is_daemon && !is_a_socket(0)) {
 838                 if (!interactive)
 839                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 840
 841                 /*
 842                  * Setting is_daemon here prevents us from eventually calling
 843                  * the open_sockets_inetd()
 844                  */
 845
 846                 is_daemon = True;
 847         }
 848
 849         if (is_daemon && !interactive) {
 850                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 851                 become_daemon(Fork);
 852         }
 853
 854 #if HAVE_SETPGID
 855         /*
 856          * If we're interactive we want to set our own process group for
 857          * signal management.
 858          */
 859         if (interactive)
 860                 setpgid( (pid_t)0, (pid_t)0);
 861 #endif
 862
 863         if (!directory_exist(lp_lockdir(), NULL))
 864                 mkdir(lp_lockdir(), 0755);
 865
 866         if (is_daemon)
 867                 pidfile_create("smbd");
 868
 869         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 870         if (!message_init())
 871                 exit(1);
 872
 873         if (!session_init())
 874                 exit(1);
 875
 876         if (conn_tdb_ctx() == NULL)
 877                 exit(1);
 878
 879         if (!locking_init(0))
 880                 exit(1);
 881
 882         if (!share_info_db_init())
 883                 exit(1);
 884
 885         namecache_enable();
 886
 887         if (!init_registry())
 888                 exit(1);
 889
 890 #if 0
 891         if (!init_svcctl_db())
 892                 exit(1);
 893 #endif
 894
 895         if (!print_backend_init())
 896                 exit(1);
 897
 898         /* Setup the main smbd so that we can get messages. */
 899         /* don't worry about general printing messages here */
 900
 901         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 902
 903         /* only start the background queue daemon if we are
 904            running as a daemon -- bad things will happen if
 905            smbd is launched via inetd and we fork a copy of
 906            ourselves here */
 907
 908         if ( is_daemon && !interactive )
 909                 start_background_queue();
 910
 911         if (!open_sockets_smbd(is_daemon, interactive, ports))
 912                 exit(1);
 913
 914         /*
 915          * everything after this point is run after the fork()
 916          */
 917
 918         /* Initialise the password backed before the global_sam_sid
 919            to ensure that we fetch from ldap before we make a domain sid up */
 920
 921         if(!initialize_password_db(False))
 922                 exit(1);
 923
 924         if(!get_global_sam_sid()) {
 925                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 926                 exit(1);
 927         }
 928
 929         static_init_rpc;
 930
 931         init_modules();
 932
 933         /* possibly reload the services file. */
 934         reload_services(True);
 935
 936         if (!init_account_policy()) {
 937                 DEBUG(0,("Could not open account policy tdb.\n"));
 938                 exit(1);
 939         }
 940
 941         if (*lp_rootdir()) {
 942                 if (sys_chroot(lp_rootdir()) == 0)
 943                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 944         }
 945
 946         /* Setup oplocks */
 947         if (!init_oplocks())
 948                 exit(1);
 949
 950         /* Setup change notify */
 951         if (!init_change_notify())
 952                 exit(1);
 953
 954         /* Setup aio signal handler. */
 955         initialize_async_io_handler();
 956
 957         /* re-initialise the timezone */
 958         TimeInit();
 959
 960         /* register our message handlers */
 961         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 962
 963         smbd_process();
 964
 965         namecache_shutdown();
 966
 967         exit_server("normal exit");
 968         return(0);
 969 }