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  What to do when smb.conf is updated.
  67  ********************************************************************/
  68
  69 static void smb_conf_updated(int msg_type, struct process_id src,
  70                              void *buf, size_t len)
  71 {
  72         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was updated. Reloading.\n"));
  73         reload_services(False);
  74 }
  75
  76
  77 /****************************************************************************
  78  Terminate signal.
  79 ****************************************************************************/
  80
  81 static void sig_term(void)
  82 {
  83         got_sig_term = 1;
  84         sys_select_signal(SIGTERM);
  85 }
  86
  87 /****************************************************************************
  88  Catch a sighup.
  89 ****************************************************************************/
  90
  91 static void sig_hup(int sig)
  92 {
  93         reload_after_sighup = 1;
  94         sys_select_signal(SIGHUP);
  95 }
  96
  97 /****************************************************************************
  98   Send a SIGTERM to our process group.
  99 *****************************************************************************/
 100
 101 static void  killkids(void)
 102 {
 103         if(am_parent) kill(0,SIGTERM);
 104 }
 105
 106 /****************************************************************************
 107  Process a sam sync message - not sure whether to do this here or
 108  somewhere else.
 109 ****************************************************************************/
 110
 111 static void msg_sam_sync(int UNUSED(msg_type), struct process_id UNUSED(pid),
 112                          void *UNUSED(buf), size_t UNUSED(len))
 113 {
 114         DEBUG(10, ("** sam sync message received, ignoring\n"));
 115 }
 116
 117 /****************************************************************************
 118  Process a sam sync replicate message - not sure whether to do this here or
 119  somewhere else.
 120 ****************************************************************************/
 121
 122 static void msg_sam_repl(int msg_type, struct process_id pid,
 123                          void *buf, size_t len)
 124 {
 125         uint32 low_serial;
 126
 127         if (len != sizeof(uint32))
 128                 return;
 129
 130         low_serial = *((uint32 *)buf);
 131
 132         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 133                   low_serial));
 134 }
 135
 136 /****************************************************************************
 137  Open the socket communication - inetd.
 138 ****************************************************************************/
 139
 140 static BOOL open_sockets_inetd(void)
 141 {
 142         /* Started from inetd. fd 0 is the socket. */
 143         /* We will abort gracefully when the client or remote system
 144            goes away */
 145         smbd_set_server_fd(dup(0));
 146
 147         /* close our standard file descriptors */
 148         close_low_fds(False); /* Don't close stderr */
 149
 150         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 151         set_socket_options(smbd_server_fd(), user_socket_options);
 152
 153         return True;
 154 }
 155
 156 static void msg_exit_server(int msg_type, struct process_id src,
 157                             void *buf, size_t len)
 158 {
 159         exit_server("Got a SHUTDOWN message");
 160 }
 161
 162
 163 /****************************************************************************
 164  Have we reached the process limit ?
 165 ****************************************************************************/
 166
 167 static BOOL allowable_number_of_smbd_processes(void)
 168 {
 169         int max_processes = lp_max_smbd_processes();
 170
 171         if (!max_processes)
 172                 return True;
 173
 174         {
 175                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 176                 int32 val;
 177                 if (!tdb) {
 178                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 179                         return False;
 180                 }
 181
 182                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 183                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 184                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 185                                 tdb_errorstr(tdb) ));
 186                         return False;
 187                 }
 188                 if (val > max_processes) {
 189                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 190                                 val, max_processes ));
 191                         return False;
 192                 }
 193         }
 194         return True;
 195 }
 196
 197 /****************************************************************************
 198  Open the socket communication.
 199 ****************************************************************************/
 200
 201 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 202 {
 203         int num_interfaces = iface_count();
 204         int num_sockets = 0;
 205         int fd_listenset[FD_SETSIZE];
 206         fd_set listen_set;
 207         int s;
 208         int maxfd = 0;
 209         int i;
 210         char *ports;
 211
 212         if (!is_daemon) {
 213                 return open_sockets_inetd();
 214         }
 215
 216
 217 #ifdef HAVE_ATEXIT
 218         {
 219                 static int atexit_set;
 220                 if(atexit_set == 0) {
 221                         atexit_set=1;
 222                         atexit(killkids);
 223                 }
 224         }
 225 #endif
 226
 227         /* Stop zombies */
 228         CatchChild();
 229
 230         FD_ZERO(&listen_set);
 231
 232         /* use a reasonable default set of ports - listing on 445 and 139 */
 233         if (!smb_ports) {
 234                 ports = lp_smb_ports();
 235                 if (!ports || !*ports) {
 236                         ports = smb_xstrdup(SMB_PORTS);
 237                 } else {
 238                         ports = smb_xstrdup(ports);
 239                 }
 240         } else {
 241                 ports = smb_xstrdup(smb_ports);
 242         }
 243
 244         if (lp_interfaces() && lp_bind_interfaces_only()) {
 245                 /* We have been given an interfaces line, and been
 246                    told to only bind to those interfaces. Create a
 247                    socket per interface and bind to only these.
 248                 */
 249
 250                 /* Now open a listen socket for each of the
 251                    interfaces. */
 252                 for(i = 0; i < num_interfaces; i++) {
 253                         struct in_addr *ifip = iface_n_ip(i);
 254                         fstring tok;
 255                         const char *ptr;
 256
 257                         if(ifip == NULL) {
 258                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 259                                 continue;
 260                         }
 261
 262                         for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 263                                 unsigned port = atoi(tok);
 264                                 if (port == 0) {
 265                                         continue;
 266                                 }
 267                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 268                                 if(s == -1)
 269                                         return False;
 270
 271                                 /* ready to listen */
 272                                 set_socket_options(s,"SO_KEEPALIVE");
 273                                 set_socket_options(s,user_socket_options);
 274
 275                                 /* Set server socket to non-blocking for the accept. */
 276                                 set_blocking(s,False);
 277
 278                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 279                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 280                                         close(s);
 281                                         return False;
 282                                 }
 283                                 FD_SET(s,&listen_set);
 284                                 maxfd = MAX( maxfd, s);
 285
 286                                 num_sockets++;
 287                                 if (num_sockets >= FD_SETSIZE) {
 288                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 289                                         return False;
 290                                 }
 291                         }
 292                 }
 293         } else {
 294                 /* Just bind to 0.0.0.0 - accept connections
 295                    from anywhere. */
 296
 297                 fstring tok;
 298                 const char *ptr;
 299
 300                 num_interfaces = 1;
 301
 302                 for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 303                         unsigned port = atoi(tok);
 304                         if (port == 0) continue;
 305                         /* open an incoming socket */
 306                         s = open_socket_in(SOCK_STREAM, port, 0,
 307                                            interpret_addr(lp_socket_address()),True);
 308                         if (s == -1)
 309                                 return(False);
 310
 311                         /* ready to listen */
 312                         set_socket_options(s,"SO_KEEPALIVE");
 313                         set_socket_options(s,user_socket_options);
 314
 315                         /* Set server socket to non-blocking for the accept. */
 316                         set_blocking(s,False);
 317
 318                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 319                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 320                                          strerror(errno)));
 321                                 close(s);
 322                                 return False;
 323                         }
 324
 325                         fd_listenset[num_sockets] = s;
 326                         FD_SET(s,&listen_set);
 327                         maxfd = MAX( maxfd, s);
 328
 329                         num_sockets++;
 330
 331                         if (num_sockets >= FD_SETSIZE) {
 332                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 333                                 return False;
 334                         }
 335                 }
 336         }
 337
 338         SAFE_FREE(ports);
 339
 340         /* Listen to messages */
 341
 342         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 343         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 344         message_register(MSG_SHUTDOWN, msg_exit_server);
 345         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 346         message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated);
 347
 348         /* now accept incoming connections - forking a new process
 349            for each incoming connection */
 350         DEBUG(2,("waiting for a connection\n"));
 351         while (1) {
 352                 fd_set lfds;
 353                 int num;
 354
 355                 /* Free up temporary memory from the main smbd. */
 356                 lp_TALLOC_FREE();
 357
 358                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 359                 message_dispatch();
 360
 361                 memcpy((char *)&lfds, (char *)&listen_set,
 362                        sizeof(listen_set));
 363
 364                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 365
 366                 if (num == -1 && errno == EINTR) {
 367                         if (got_sig_term) {
 368                                 exit_server("Caught TERM signal");
 369                         }
 370
 371                         /* check for sighup processing */
 372                         if (reload_after_sighup) {
 373                                 change_to_root_user();
 374                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 375                                 reload_services(False);
 376                                 reload_after_sighup = 0;
 377                         }
 378
 379                         continue;
 380                 }
 381
 382                 /* check if we need to reload services */
 383                 check_reload(time(NULL));
 384
 385                 /* Find the sockets that are read-ready -
 386                    accept on these. */
 387                 for( ; num > 0; num--) {
 388                         struct sockaddr addr;
 389                         socklen_t in_addrlen = sizeof(addr);
 390
 391                         s = -1;
 392                         for(i = 0; i < num_sockets; i++) {
 393                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 394                                         s = fd_listenset[i];
 395                                         /* Clear this so we don't look
 396                                            at it again. */
 397                                         FD_CLR(fd_listenset[i],&lfds);
 398                                         break;
 399                                 }
 400                         }
 401
 402                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 403
 404                         if (smbd_server_fd() == -1 && errno == EINTR)
 405                                 continue;
 406
 407                         if (smbd_server_fd() == -1) {
 408                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 409                                          strerror(errno)));
 410                                 continue;
 411                         }
 412
 413                         /* Ensure child is set to blocking mode */
 414                         set_blocking(smbd_server_fd(),True);
 415
 416                         if (smbd_server_fd() != -1 && interactive)
 417                                 return True;
 418
 419                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 420                                 /* Child code ... */
 421
 422                                 /* close the listening socket(s) */
 423                                 for(i = 0; i < num_sockets; i++)
 424                                         close(fd_listenset[i]);
 425
 426                                 /* close our standard file
 427                                    descriptors */
 428                                 close_low_fds(False);
 429                                 am_parent = 0;
 430
 431                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 432                                 set_socket_options(smbd_server_fd(),user_socket_options);
 433
 434                                 /* this is needed so that we get decent entries
 435                                    in smbstatus for port 445 connects */
 436                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 437
 438                                 /* Reset the state of the random
 439                                  * number generation system, so
 440                                  * children do not get the same random
 441                                  * numbers as each other */
 442
 443                                 set_need_random_reseed();
 444                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 445                                 if (tdb_reopen_all() == -1) {
 446                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 447                                         smb_panic("tdb_reopen_all failed.");
 448                                 }
 449
 450                                 return True;
 451                         }
 452                         /* The parent doesn't need this socket */
 453                         close(smbd_server_fd());
 454
 455                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 456                                 Clear the closed fd info out of server_fd --
 457                                 and more importantly, out of client_fd in
 458                                 util_sock.c, to avoid a possible
 459                                 getpeername failure if we reopen the logs
 460                                 and use %I in the filename.
 461                         */
 462
 463                         smbd_set_server_fd(-1);
 464
 465                         /* Force parent to check log size after
 466                          * spawning child.  Fix from
 467                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 468                          * parent smbd will log to logserver.smb.  It
 469                          * writes only two messages for each child
 470                          * started/finished. But each child writes,
 471                          * say, 50 messages also in logserver.smb,
 472                          * begining with the debug_count of the
 473                          * parent, before the child opens its own log
 474                          * file logserver.client. In a worst case
 475                          * scenario the size of logserver.smb would be
 476                          * checked after about 50*50=2500 messages
 477                          * (ca. 100kb).
 478                          * */
 479                         force_check_log_size();
 480
 481                 } /* end for num */
 482         } /* end while 1 */
 483
 484 /* NOTREACHED   return True; */
 485 }
 486
 487 /****************************************************************************
 488  Reload printers
 489 **************************************************************************/
 490 void reload_printers(void)
 491 {
 492         int snum;
 493         int n_services = lp_numservices();
 494         int pnum = lp_servicenumber(PRINTERS_NAME);
 495         const char *pname;
 496
 497         pcap_cache_reload();
 498
 499         /* remove stale printers */
 500         for (snum = 0; snum < n_services; snum++) {
 501                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 502                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 503                                       lp_autoloaded(snum)))
 504                         continue;
 505
 506                 pname = lp_printername(snum);
 507                 if (!pcap_printername_ok(pname)) {
 508                         DEBUG(3, ("removing stale printer %s\n", pname));
 509
 510                         if (is_printer_published(NULL, snum, NULL))
 511                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 512                         del_a_printer(pname);
 513                         lp_killservice(snum);
 514                 }
 515         }
 516
 517         load_printers();
 518 }
 519
 520 /****************************************************************************
 521  Reload the services file.
 522 **************************************************************************/
 523
 524 BOOL reload_services(BOOL test)
 525 {
 526         BOOL ret;
 527
 528         if (lp_loaded()) {
 529                 pstring fname;
 530                 pstrcpy(fname,lp_configfile());
 531                 if (file_exist(fname, NULL) &&
 532                     !strcsequal(fname, dyn_CONFIGFILE)) {
 533                         pstrcpy(dyn_CONFIGFILE, fname);
 534                         test = False;
 535                 }
 536         }
 537
 538         reopen_logs();
 539
 540         if (test && !lp_file_list_changed())
 541                 return(True);
 542
 543         lp_killunused(conn_snum_used);
 544
 545         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
 546
 547         reload_printers();
 548
 549         /* perhaps the config filename is now set */
 550         if (!test)
 551                 reload_services(True);
 552
 553         reopen_logs();
 554
 555         load_interfaces();
 556
 557         if (smbd_server_fd() != -1) {
 558                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 559                 set_socket_options(smbd_server_fd(), user_socket_options);
 560         }
 561
 562         mangle_reset_cache();
 563         reset_stat_cache();
 564
 565         /* this forces service parameters to be flushed */
 566         set_current_service(NULL,0,True);
 567
 568         return(ret);
 569 }
 570
 571
 572 #if DUMP_CORE
 573 /*******************************************************************
 574 prepare to dump a core file - carefully!
 575 ********************************************************************/
 576 static BOOL dump_core(void)
 577 {
 578         char *p;
 579         pstring dname;
 580
 581         pstrcpy(dname,lp_logfile());
 582         if ((p=strrchr_m(dname,'/'))) *p=0;
 583         pstrcat(dname,"/corefiles");
 584         mkdir(dname,0700);
 585         sys_chown(dname,getuid(),getgid());
 586         chmod(dname,0700);
 587         if (chdir(dname)) return(False);
 588         umask(~(0700));
 589
 590 #ifdef HAVE_GETRLIMIT
 591 #ifdef RLIMIT_CORE
 592         {
 593                 struct rlimit rlp;
 594                 getrlimit(RLIMIT_CORE, &rlp);
 595                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 596                 setrlimit(RLIMIT_CORE, &rlp);
 597                 getrlimit(RLIMIT_CORE, &rlp);
 598                 DEBUG(3,("Core limits now %d %d\n",
 599                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 600         }
 601 #endif
 602 #endif
 603
 604
 605         DEBUG(0,("Dumping core in %s\n", dname));
 606         /* Ensure we don't have a signal handler for abort. */
 607 #ifdef SIGABRT
 608         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 609 #endif
 610         abort();
 611         return(True);
 612 }
 613 #endif
 614
 615 /****************************************************************************
 616  Exit the server.
 617 ****************************************************************************/
 618
 619 void exit_server(const char *reason)
 620 {
 621         static int firsttime=1;
 622
 623         if (!firsttime)
 624                 exit(0);
 625         firsttime = 0;
 626
 627         change_to_root_user();
 628         DEBUG(2,("Closing connections\n"));
 629
 630         if (negprot_global_auth_context) {
 631                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 632         }
 633
 634         conn_close_all();
 635
 636         invalidate_all_vuids();
 637
 638         print_notify_send_messages(3); /* 3 second timeout. */
 639
 640         /* delete our entry in the connections database. */
 641         yield_connection(NULL,"");
 642
 643         respond_to_all_remaining_local_messages();
 644         decrement_smbd_process_count();
 645
 646 #ifdef WITH_DFS
 647         if (dcelogin_atmost_once) {
 648                 dfs_unlogin();
 649         }
 650 #endif
 651
 652         if (!reason) {
 653                 int oldlevel = DEBUGLEVEL;
 654                 char *last_inbuf = get_InBuffer();
 655                 DEBUGLEVEL = 10;
 656                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 657                 if (last_inbuf)
 658                         show_msg(last_inbuf);
 659                 DEBUGLEVEL = oldlevel;
 660                 DEBUG(0,("===============================================================\n"));
 661 #if DUMP_CORE
 662                 if (dump_core()) return;
 663 #endif
 664         }
 665
 666         locking_end();
 667         printing_end();
 668
 669         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 670         exit(0);
 671 }
 672
 673 /****************************************************************************
 674  Initialise connect, service and file structs.
 675 ****************************************************************************/
 676
 677 static BOOL init_structs(void )
 678 {
 679         /*
 680          * Set the machine NETBIOS name if not already
 681          * set from the config file.
 682          */
 683
 684         if (!init_names())
 685                 return False;
 686
 687         conn_init();
 688
 689         file_init();
 690
 691         /* for RPC pipes */
 692         init_rpc_pipe_hnd();
 693
 694         init_dptrs();
 695
 696         secrets_init();
 697
 698         return True;
 699 }
 700
 701 /****************************************************************************
 702  main program.
 703 ****************************************************************************/
 704
 705 /* Declare prototype for build_options() to avoid having to run it through
 706    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 707    prototype generation system is too complicated. */
 708
 709 void build_options(BOOL screen);
 710
 711  int main(int argc,const char *argv[])
 712 {
 713         extern BOOL in_server;
 714         /* shall I run as a daemon */
 715         static BOOL is_daemon = False;
 716         static BOOL interactive = False;
 717         static BOOL Fork = True;
 718         static BOOL no_process_group = False;
 719         static BOOL log_stdout = False;
 720         static char *ports = NULL;
 721         int opt;
 722         poptContext pc;
 723
 724         struct poptOption long_options[] = {
 725                 POPT_AUTOHELP
 726         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 727         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 728         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 729         {"no-process-group", 0, POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
 730         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 731         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 732         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 733         POPT_COMMON_SAMBA
 734         { NULL }
 735         };
 736
 737         in_server = True;
 738
 739         load_case_tables();
 740
 741 #ifdef HAVE_SET_AUTH_PARAMETERS
 742         set_auth_parameters(argc,argv);
 743 #endif
 744
 745         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 746
 747         while((opt = poptGetNextOpt(pc)) != -1) {
 748                 switch (opt)  {
 749                 case 'b':
 750                         build_options(True); /* Display output to screen as well as debug */
 751                         exit(0);
 752                         break;
 753                 }
 754         }
 755
 756         poptFreeContext(pc);
 757
 758 #ifdef HAVE_SETLUID
 759         /* needed for SecureWare on SCO */
 760         setluid(0);
 761 #endif
 762
 763         sec_init();
 764
 765         set_remote_machine_name("smbd", False);
 766
 767         if (interactive) {
 768                 Fork = False;
 769                 log_stdout = True;
 770         }
 771
 772         if (interactive && (DEBUGLEVEL >= 9)) {
 773                 talloc_enable_leak_report();
 774         }
 775
 776         if (log_stdout && Fork) {
 777                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 778                 exit(1);
 779         }
 780
 781         setup_logging(argv[0],log_stdout);
 782
 783         /* we want to re-seed early to prevent time delays causing
 784            client problems at a later date. (tridge) */
 785         generate_random_buffer(NULL, 0);
 786
 787         /* make absolutely sure we run as root - to handle cases where people
 788            are crazy enough to have it setuid */
 789
 790         gain_root_privilege();
 791         gain_root_group_privilege();
 792
 793         fault_setup((void (*)(void *))exit_server);
 794         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 795         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 796
 797         /* we are never interested in SIGPIPE */
 798         BlockSignals(True,SIGPIPE);
 799
 800 #if defined(SIGFPE)
 801         /* we are never interested in SIGFPE */
 802         BlockSignals(True,SIGFPE);
 803 #endif
 804
 805 #if defined(SIGUSR2)
 806         /* We are no longer interested in USR2 */
 807         BlockSignals(True,SIGUSR2);
 808 #endif
 809
 810         /* POSIX demands that signals are inherited. If the invoking process has
 811          * these signals masked, we will have problems, as we won't recieve them. */
 812         BlockSignals(False, SIGHUP);
 813         BlockSignals(False, SIGUSR1);
 814         BlockSignals(False, SIGTERM);
 815
 816         /* we want total control over the permissions on created files,
 817            so set our umask to 0 */
 818         umask(0);
 819
 820         init_sec_ctx();
 821
 822         reopen_logs();
 823
 824         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 825         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 826
 827         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 828                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 829
 830         /* Output the build options to the debug log */
 831         build_options(False);
 832
 833         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 834                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 835                 exit(1);
 836         }
 837
 838         /*
 839          * Do this before reload_services.
 840          */
 841
 842         if (!reload_services(False))
 843                 return(-1);
 844
 845         init_structs();
 846
 847 #ifdef WITH_PROFILE
 848         if (!profile_setup(False)) {
 849                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 850                 return -1;
 851         }
 852 #endif
 853
 854         DEBUG(3,( "loaded services\n"));
 855
 856         if (!is_daemon && !is_a_socket(0)) {
 857                 if (!interactive)
 858                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 859
 860                 /*
 861                  * Setting is_daemon here prevents us from eventually calling
 862                  * the open_sockets_inetd()
 863                  */
 864
 865                 is_daemon = True;
 866         }
 867
 868         if (is_daemon && !interactive) {
 869                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 870                 become_daemon(Fork, no_process_group);
 871         }
 872
 873 #if HAVE_SETPGID
 874         /*
 875          * If we're interactive we want to set our own process group for
 876          * signal management.
 877          */
 878         if (interactive && !no_process_group) {
 879                 setpgid( (pid_t)0, (pid_t)0);
 880         }
 881 #endif
 882
 883         if (!directory_exist(lp_lockdir(), NULL))
 884                 mkdir(lp_lockdir(), 0755);
 885
 886         if (is_daemon)
 887                 pidfile_create("smbd");
 888
 889         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 890         if (!message_init())
 891                 exit(1);
 892
 893         if (!session_init())
 894                 exit(1);
 895
 896         if (conn_tdb_ctx() == NULL)
 897                 exit(1);
 898
 899         if (!locking_init(0))
 900                 exit(1);
 901
 902         namecache_enable();
 903
 904         if (!init_registry())
 905                 exit(1);
 906
 907 #if 0
 908         if (!init_svcctl_db())
 909                 exit(1);
 910 #endif
 911
 912         if (!print_backend_init())
 913                 exit(1);
 914
 915         if (!init_guest_info()) {
 916                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
 917                 return -1;
 918         }
 919
 920         /* Setup the main smbd so that we can get messages. */
 921         /* don't worry about general printing messages here */
 922
 923         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 924
 925         /* only start the background queue daemon if we are
 926            running as a daemon -- bad things will happen if
 927            smbd is launched via inetd and we fork a copy of
 928            ourselves here */
 929
 930         if ( is_daemon && !interactive )
 931                 start_background_queue();
 932
 933         /* Always attempt to initialize DMAPI. We will only use it later if
 934          * lp_dmapi_support is set on the share, but we need a single global
 935          * session to work with.
 936          */
 937         dmapi_init_session();
 938
 939         if (!open_sockets_smbd(is_daemon, interactive, ports))
 940                 exit(1);
 941
 942         /*
 943          * everything after this point is run after the fork()
 944          */
 945
 946 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
 947         /* On Linux we lose the ability to dump core when we change our user
 948          * ID. We know how to dump core safely, so let's make sure we have our
 949          * dumpable flag set.
 950          */
 951         prctl(PR_SET_DUMPABLE, 1);
 952 #endif
 953
 954         /* Initialise the password backed before the global_sam_sid
 955            to ensure that we fetch from ldap before we make a domain sid up */
 956
 957         if(!initialize_password_db(False))
 958                 exit(1);
 959
 960         if(!get_global_sam_sid()) {
 961                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 962                 exit(1);
 963         }
 964
 965         static_init_rpc;
 966
 967         init_modules();
 968
 969         /* possibly reload the services file. */
 970         reload_services(True);
 971
 972         if (!init_account_policy()) {
 973                 DEBUG(0,("Could not open account policy tdb.\n"));
 974                 exit(1);
 975         }
 976
 977         if (*lp_rootdir()) {
 978                 if (sys_chroot(lp_rootdir()) == 0)
 979                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 980         }
 981
 982         /* Setup oplocks */
 983         if (!init_oplocks())
 984                 exit(1);
 985
 986         /* Setup change notify */
 987         if (!init_change_notify())
 988                 exit(1);
 989
 990         /* Setup aio signal handler. */
 991         initialize_async_io_handler();
 992
 993         /* re-initialise the timezone */
 994         TimeInit();
 995
 996         /* register our message handlers */
 997         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 998
 999         smbd_process();
1000
1001         namecache_shutdown();
1002
1003         exit_server("normal exit");
1004         return(0);
1005 }