source3/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002
   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 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 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 i;
 190         char *ports;
 191
 192         if (!is_daemon) {
 193                 return open_sockets_inetd();
 194         }
 195
 196
 197 #ifdef HAVE_ATEXIT
 198         {
 199                 static int atexit_set;
 200                 if(atexit_set == 0) {
 201                         atexit_set=1;
 202                         atexit(killkids);
 203                 }
 204         }
 205 #endif
 206
 207         /* Stop zombies */
 208         CatchChild();
 209
 210         FD_ZERO(&listen_set);
 211
 212         /* use a reasonable default set of ports - listing on 445 and 139 */
 213         if (!smb_ports) {
 214                 ports = lp_smb_ports();
 215                 if (!ports || !*ports) {
 216                         ports = smb_xstrdup(SMB_PORTS);
 217                 } else {
 218                         ports = smb_xstrdup(ports);
 219                 }
 220         } else {
 221                 ports = smb_xstrdup(smb_ports);
 222         }
 223
 224         if (lp_interfaces() && lp_bind_interfaces_only()) {
 225                 /* We have been given an interfaces line, and been
 226                    told to only bind to those interfaces. Create a
 227                    socket per interface and bind to only these.
 228                 */
 229
 230                 /* Now open a listen socket for each of the
 231                    interfaces. */
 232                 for(i = 0; i < num_interfaces; i++) {
 233                         struct in_addr *ifip = iface_n_ip(i);
 234                         fstring tok;
 235                         const char *ptr;
 236
 237                         if(ifip == NULL) {
 238                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 239                                 continue;
 240                         }
 241
 242                         for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 243                                 unsigned port = atoi(tok);
 244                                 if (port == 0) continue;
 245                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 246                                 if(s == -1)
 247                                         return False;
 248
 249                                 /* ready to listen */
 250                                 set_socket_options(s,"SO_KEEPALIVE");
 251                                 set_socket_options(s,user_socket_options);
 252
 253                                 if (listen(s, 5) == -1) {
 254                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 255                                         close(s);
 256                                         return False;
 257                                 }
 258                                 FD_SET(s,&listen_set);
 259
 260                                 num_sockets++;
 261                                 if (num_sockets >= FD_SETSIZE) {
 262                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 263                                         return False;
 264                                 }
 265                         }
 266                 }
 267         } else {
 268                 /* Just bind to 0.0.0.0 - accept connections
 269                    from anywhere. */
 270
 271                 fstring tok;
 272                 const char *ptr;
 273
 274                 num_interfaces = 1;
 275
 276                 for (ptr=ports; next_token(&ptr, tok, NULL, sizeof(tok)); ) {
 277                         unsigned port = atoi(tok);
 278                         if (port == 0) continue;
 279                         /* open an incoming socket */
 280                         s = open_socket_in(SOCK_STREAM, port, 0,
 281                                            interpret_addr(lp_socket_address()),True);
 282                         if (s == -1)
 283                                 return(False);
 284
 285                         /* ready to listen */
 286                         set_socket_options(s,"SO_KEEPALIVE");
 287                         set_socket_options(s,user_socket_options);
 288
 289                         if (listen(s, 5) == -1) {
 290                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 291                                          strerror(errno)));
 292                                 close(s);
 293                                 return False;
 294                         }
 295
 296                         fd_listenset[num_sockets] = s;
 297                         FD_SET(s,&listen_set);
 298
 299                         num_sockets++;
 300
 301                         if (num_sockets >= FD_SETSIZE) {
 302                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 303                                 return False;
 304                         }
 305                 }
 306         }
 307
 308         SAFE_FREE(ports);
 309
 310         /* Listen to messages */
 311
 312         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 313         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 314         message_register(MSG_SHUTDOWN, msg_exit_server);
 315
 316         /* now accept incoming connections - forking a new process
 317            for each incoming connection */
 318         DEBUG(2,("waiting for a connection\n"));
 319         while (1) {
 320                 fd_set lfds;
 321                 int num;
 322
 323                 /* Free up temporary memory from the main smbd. */
 324                 lp_talloc_free();
 325
 326                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 327                 message_dispatch();
 328
 329                 memcpy((char *)&lfds, (char *)&listen_set,
 330                        sizeof(listen_set));
 331
 332                 num = sys_select(FD_SETSIZE,&lfds,NULL,NULL,NULL);
 333
 334                 if (num == -1 && errno == EINTR) {
 335                         if (got_sig_term) {
 336                                 exit_server("Caught TERM signal");
 337                         }
 338
 339                         /* check for sighup processing */
 340                         if (reload_after_sighup) {
 341                                 change_to_root_user();
 342                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 343                                 reload_services(False);
 344                                 reload_after_sighup = 0;
 345                         }
 346
 347                         continue;
 348                 }
 349
 350                 /* check if we need to reload services */
 351                 check_reload(time(NULL));
 352
 353                 /* Find the sockets that are read-ready -
 354                    accept on these. */
 355                 for( ; num > 0; num--) {
 356                         struct sockaddr addr;
 357                         socklen_t in_addrlen = sizeof(addr);
 358
 359                         s = -1;
 360                         for(i = 0; i < num_sockets; i++) {
 361                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 362                                         s = fd_listenset[i];
 363                                         /* Clear this so we don't look
 364                                            at it again. */
 365                                         FD_CLR(fd_listenset[i],&lfds);
 366                                         break;
 367                                 }
 368                         }
 369
 370                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 371
 372                         if (smbd_server_fd() == -1 && errno == EINTR)
 373                                 continue;
 374
 375                         if (smbd_server_fd() == -1) {
 376                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 377                                          strerror(errno)));
 378                                 continue;
 379                         }
 380
 381                         if (smbd_server_fd() != -1 && interactive)
 382                                 return True;
 383
 384                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 385                                 /* Child code ... */
 386
 387                                 /* close the listening socket(s) */
 388                                 for(i = 0; i < num_sockets; i++)
 389                                         close(fd_listenset[i]);
 390
 391                                 /* close our standard file
 392                                    descriptors */
 393                                 close_low_fds(False);
 394                                 am_parent = 0;
 395
 396                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 397                                 set_socket_options(smbd_server_fd(),user_socket_options);
 398
 399                                 /* this is needed so that we get decent entries
 400                                    in smbstatus for port 445 connects */
 401                                 set_remote_machine_name(get_socket_addr(smbd_server_fd()));
 402
 403                                 /* Reset global variables in util.c so
 404                                    that client substitutions will be
 405                                    done correctly in the process.  */
 406                                 reset_globals_after_fork();
 407
 408                                 /* tdb needs special fork handling */
 409                                 if (tdb_reopen_all() == -1) {
 410                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 411                                         return False;
 412                                 }
 413
 414                                 /* Load DSO's */
 415                                 if(lp_modules())
 416                                         smb_load_modules(lp_modules());
 417
 418                                 return True;
 419                         }
 420                         /* The parent doesn't need this socket */
 421                         close(smbd_server_fd());
 422
 423                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 424                                 Clear the closed fd info out of server_fd --
 425                                 and more importantly, out of client_fd in
 426                                 util_sock.c, to avoid a possible
 427                                 getpeername failure if we reopen the logs
 428                                 and use %I in the filename.
 429                         */
 430
 431                         smbd_set_server_fd(-1);
 432
 433                         /* Force parent to check log size after
 434                          * spawning child.  Fix from
 435                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 436                          * parent smbd will log to logserver.smb.  It
 437                          * writes only two messages for each child
 438                          * started/finished. But each child writes,
 439                          * say, 50 messages also in logserver.smb,
 440                          * begining with the debug_count of the
 441                          * parent, before the child opens its own log
 442                          * file logserver.client. In a worst case
 443                          * scenario the size of logserver.smb would be
 444                          * checked after about 50*50=2500 messages
 445                          * (ca. 100kb).
 446                          * */
 447                         force_check_log_size();
 448
 449                 } /* end for num */
 450         } /* end while 1 */
 451
 452 /* NOTREACHED   return True; */
 453 }
 454
 455 /****************************************************************************
 456  Reload the services file.
 457 **************************************************************************/
 458
 459 BOOL reload_services(BOOL test)
 460 {
 461         BOOL ret;
 462
 463         if (lp_loaded()) {
 464                 pstring fname;
 465                 pstrcpy(fname,lp_configfile());
 466                 if (file_exist(fname, NULL) &&
 467                     !strcsequal(fname, dyn_CONFIGFILE)) {
 468                         pstrcpy(dyn_CONFIGFILE, fname);
 469                         test = False;
 470                 }
 471         }
 472
 473         reopen_logs();
 474
 475         if (test && !lp_file_list_changed())
 476                 return(True);
 477
 478         lp_killunused(conn_snum_used);
 479
 480         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 481
 482         load_printers();
 483
 484         /* perhaps the config filename is now set */
 485         if (!test)
 486                 reload_services(True);
 487
 488         reopen_logs();
 489
 490         load_interfaces();
 491
 492         {
 493                 if (smbd_server_fd() != -1) {
 494                         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 495                         set_socket_options(smbd_server_fd(), user_socket_options);
 496                 }
 497         }
 498
 499         mangle_reset_cache();
 500         reset_stat_cache();
 501
 502         /* this forces service parameters to be flushed */
 503         set_current_service(NULL,True);
 504
 505         return(ret);
 506 }
 507
 508 /*******************************************************************
 509  Print out all talloc memory info.
 510 ********************************************************************/
 511
 512 void return_all_talloc_info(int msg_type, pid_t src_pid, void *buf, size_t len)
 513 {
 514         TALLOC_CTX *ctx = talloc_init("info context");
 515         char *info = NULL;
 516
 517         if (!ctx)
 518                 return;
 519
 520         info = talloc_describe_all(ctx);
 521         if (info)
 522                 DEBUG(10,(info));
 523         message_send_pid(src_pid, MSG_TALLOC_USAGE, info, info ? strlen(info) + 1 : 0, True);
 524         talloc_destroy(ctx);
 525 }
 526
 527 #if DUMP_CORE
 528 /*******************************************************************
 529 prepare to dump a core file - carefully!
 530 ********************************************************************/
 531 static BOOL dump_core(void)
 532 {
 533         char *p;
 534         pstring dname;
 535
 536         pstrcpy(dname,lp_logfile());
 537         if ((p=strrchr_m(dname,'/'))) *p=0;
 538         pstrcat(dname,"/corefiles");
 539         mkdir(dname,0700);
 540         sys_chown(dname,getuid(),getgid());
 541         chmod(dname,0700);
 542         if (chdir(dname)) return(False);
 543         umask(~(0700));
 544
 545 #ifdef HAVE_GETRLIMIT
 546 #ifdef RLIMIT_CORE
 547         {
 548                 struct rlimit rlp;
 549                 getrlimit(RLIMIT_CORE, &rlp);
 550                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 551                 setrlimit(RLIMIT_CORE, &rlp);
 552                 getrlimit(RLIMIT_CORE, &rlp);
 553                 DEBUG(3,("Core limits now %d %d\n",
 554                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 555         }
 556 #endif
 557 #endif
 558
 559
 560         DEBUG(0,("Dumping core in %s\n", dname));
 561         abort();
 562         return(True);
 563 }
 564 #endif
 565
 566 /****************************************************************************
 567  Exit the server.
 568 ****************************************************************************/
 569
 570 void exit_server(const char *reason)
 571 {
 572         static int firsttime=1;
 573         extern char *last_inbuf;
 574         extern struct auth_context *negprot_global_auth_context;
 575
 576         if (!firsttime)
 577                 exit(0);
 578         firsttime = 0;
 579
 580         change_to_root_user();
 581         DEBUG(2,("Closing connections\n"));
 582
 583         if (negprot_global_auth_context) {
 584                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 585         }
 586
 587         conn_close_all();
 588
 589         invalidate_all_vuids();
 590
 591         print_notify_send_messages(3); /* 3 second timeout. */
 592
 593         /* delete our entry in the connections database. */
 594         yield_connection(NULL,"");
 595
 596         respond_to_all_remaining_local_messages();
 597         decrement_smbd_process_count();
 598
 599 #ifdef WITH_DFS
 600         if (dcelogin_atmost_once) {
 601                 dfs_unlogin();
 602         }
 603 #endif
 604
 605         if (!reason) {
 606                 int oldlevel = DEBUGLEVEL;
 607                 DEBUGLEVEL = 10;
 608                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 609                 if (last_inbuf)
 610                         show_msg(last_inbuf);
 611                 DEBUGLEVEL = oldlevel;
 612                 DEBUG(0,("===============================================================\n"));
 613 #if DUMP_CORE
 614                 if (dump_core()) return;
 615 #endif
 616         }
 617
 618         locking_end();
 619         printing_end();
 620
 621         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 622         exit(0);
 623 }
 624
 625 /****************************************************************************
 626  Initialise connect, service and file structs.
 627 ****************************************************************************/
 628
 629 static BOOL init_structs(void )
 630 {
 631         /*
 632          * Set the machine NETBIOS name if not already
 633          * set from the config file.
 634          */
 635
 636         if (!init_names())
 637                 return False;
 638
 639         conn_init();
 640
 641         file_init();
 642
 643         /* for RPC pipes */
 644         init_rpc_pipe_hnd();
 645
 646         init_dptrs();
 647
 648         secrets_init();
 649
 650         return True;
 651 }
 652
 653 /****************************************************************************
 654  main program.
 655 ****************************************************************************/
 656
 657  int main(int argc,const char *argv[])
 658 {
 659         /* shall I run as a daemon */
 660         static BOOL is_daemon = False;
 661         static BOOL interactive = False;
 662         static BOOL Fork = True;
 663         static BOOL log_stdout = False;
 664         static char *ports = NULL;
 665         int opt;
 666         poptContext pc;
 667
 668         struct poptOption long_options[] = {
 669                 POPT_AUTOHELP
 670         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 671         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 672         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 673         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 674         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 675         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 676         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_debug},
 677         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_configfile},
 678         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_socket_options},
 679         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_log_base},
 680         {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_version},
 681         { NULL }
 682         };
 683
 684 #ifdef HAVE_SET_AUTH_PARAMETERS
 685         set_auth_parameters(argc,argv);
 686 #endif
 687
 688         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 689
 690         while((opt = poptGetNextOpt(pc)) != -1) {
 691                 switch (opt)  {
 692                 case 'b':
 693                         build_options(True); /* Display output to screen as well as debug */
 694                         exit(0);
 695                         break;
 696                 }
 697         }
 698
 699         poptFreeContext(pc);
 700
 701 #ifdef HAVE_SETLUID
 702         /* needed for SecureWare on SCO */
 703         setluid(0);
 704 #endif
 705
 706         sec_init();
 707
 708         load_case_tables();
 709
 710         set_remote_machine_name("smbd");
 711
 712         if (interactive) {
 713                 Fork = False;
 714                 log_stdout = True;
 715         }
 716
 717         if (log_stdout && Fork) {
 718                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 719                 exit(1);
 720         }
 721
 722         setup_logging(argv[0],log_stdout);
 723
 724         /* we want to re-seed early to prevent time delays causing
 725            client problems at a later date. (tridge) */
 726         generate_random_buffer(NULL, 0, False);
 727
 728         /* make absolutely sure we run as root - to handle cases where people
 729            are crazy enough to have it setuid */
 730
 731         gain_root_privilege();
 732         gain_root_group_privilege();
 733
 734         fault_setup((void (*)(void *))exit_server);
 735         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 736         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 737
 738         /* we are never interested in SIGPIPE */
 739         BlockSignals(True,SIGPIPE);
 740
 741 #if defined(SIGFPE)
 742         /* we are never interested in SIGFPE */
 743         BlockSignals(True,SIGFPE);
 744 #endif
 745
 746 #if defined(SIGUSR2)
 747         /* We are no longer interested in USR2 */
 748         BlockSignals(True,SIGUSR2);
 749 #endif
 750
 751         /* POSIX demands that signals are inherited. If the invoking process has
 752          * these signals masked, we will have problems, as we won't recieve them. */
 753         BlockSignals(False, SIGHUP);
 754         BlockSignals(False, SIGUSR1);
 755         BlockSignals(False, SIGTERM);
 756
 757         /* we want total control over the permissions on created files,
 758            so set our umask to 0 */
 759         umask(0);
 760
 761         init_sec_ctx();
 762
 763         reopen_logs();
 764
 765         DEBUG(0,( "smbd version %s started.\n", VERSION));
 766         DEBUGADD(0,( "Copyright Andrew Tridgell and the Samba Team 1992-2002\n"));
 767
 768         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 769                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 770
 771         /* Output the build options to the debug log */
 772         build_options(False);
 773
 774         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 775                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 776                 exit(1);
 777         }
 778
 779         /*
 780          * Do this before reload_services.
 781          */
 782
 783         if (!reload_services(False))
 784                 return(-1);
 785
 786         init_structs();
 787
 788 #ifdef WITH_PROFILE
 789         if (!profile_setup(False)) {
 790                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 791                 return -1;
 792         }
 793 #endif
 794
 795         DEBUG(3,( "loaded services\n"));
 796
 797         if (!is_daemon && !is_a_socket(0)) {
 798                 if (!interactive)
 799                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 800
 801                 /*
 802                  * Setting is_daemon here prevents us from eventually calling
 803                  * the open_sockets_inetd()
 804                  */
 805
 806                 is_daemon = True;
 807         }
 808
 809         if (is_daemon && !interactive) {
 810                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 811                 become_daemon(Fork);
 812         }
 813
 814 #if HAVE_SETPGID
 815         /*
 816          * If we're interactive we want to set our own process group for
 817          * signal management.
 818          */
 819         if (interactive)
 820                 setpgid( (pid_t)0, (pid_t)0);
 821 #endif
 822
 823         if (!directory_exist(lp_lockdir(), NULL))
 824                 mkdir(lp_lockdir(), 0755);
 825
 826         if (is_daemon)
 827                 pidfile_create("smbd");
 828
 829         if (!message_init())
 830                 exit(1);
 831
 832         register_msg_pool_usage();
 833         register_dmalloc_msgs();
 834         message_register(MSG_REQ_TALLOC_USAGE, return_all_talloc_info);
 835
 836         if (!print_backend_init())
 837                 exit(1);
 838
 839         /* Setup the main smbd so that we can get messages. */
 840         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 841
 842         /*
 843            DO NOT ENABLE THIS TILL YOU COPE WITH KILLING THESE TASKS AND INETD
 844            THIS *killed* LOTS OF BUILD FARM MACHINES. IT CREATED HUNDREDS OF
 845            smbd PROCESSES THAT NEVER DIE
 846            start_background_queue();
 847         */
 848
 849         if (!open_sockets_smbd(is_daemon, interactive, ports))
 850                 exit(1);
 851
 852         /*
 853          * everything after this point is run after the fork()
 854          */
 855
 856         namecache_enable();
 857
 858         if (!locking_init(0))
 859                 exit(1);
 860
 861         if (!share_info_db_init())
 862                 exit(1);
 863
 864         if (!init_registry())
 865                 exit(1);
 866
 867         if(!initialize_password_db(False))
 868                 exit(1);
 869
 870         uni_group_cache_init(); /* Non-critical */
 871
 872         /* possibly reload the services file. */
 873         reload_services(True);
 874
 875         if(!get_global_sam_sid()) {
 876                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 877                 exit(1);
 878         }
 879
 880         if (!init_account_policy()) {
 881                 DEBUG(0,("Could not open account policy tdb.\n"));
 882                 exit(1);
 883         }
 884
 885         if (*lp_rootdir()) {
 886                 if (sys_chroot(lp_rootdir()) == 0)
 887                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 888         }
 889
 890         /* Setup oplocks */
 891         if (!init_oplocks())
 892                 exit(1);
 893
 894         /* Setup change notify */
 895         if (!init_change_notify())
 896                 exit(1);
 897
 898         /* re-initialise the timezone */
 899         TimeInit();
 900
 901         /* register our message handlers */
 902         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 903
 904         smbd_process();
 905
 906         uni_group_cache_shutdown();
 907         namecache_shutdown();
 908         exit_server("normal exit");
 909         return(0);
 910 }