source/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 #ifdef HAVE_SYS_PRCTL_H
  26 #include <sys/prctl.h>
  27 #endif
  28
  29 static int am_parent = 1;
  30
  31 /* the last message the was processed */
  32 int last_message = -1;
  33
  34 /* a useful macro to debug the last message processed */
  35 #define LAST_MESSAGE() smb_fn_name(last_message)
  36
  37 extern struct auth_context *negprot_global_auth_context;
  38 extern pstring user_socket_options;
  39 extern SIG_ATOMIC_T got_sig_term;
  40 extern SIG_ATOMIC_T reload_after_sighup;
  41
  42 #ifdef WITH_DFS
  43 extern int dcelogin_atmost_once;
  44 #endif /* WITH_DFS */
  45
  46 /* really we should have a top level context structure that has the
  47    client file descriptor as an element. That would require a major rewrite :(
  48
  49    the following 2 functions are an alternative - they make the file
  50    descriptor private to smbd
  51  */
  52 static int server_fd = -1;
  53
  54 int smbd_server_fd(void)
  55 {
  56         return server_fd;
  57 }
  58
  59 static void smbd_set_server_fd(int fd)
  60 {
  61         server_fd = fd;
  62         client_setfd(fd);
  63 }
  64
  65 /****************************************************************************
  66  Terminate signal.
  67 ****************************************************************************/
  68
  69 static void sig_term(void)
  70 {
  71         got_sig_term = 1;
  72         sys_select_signal(SIGTERM);
  73 }
  74
  75 /****************************************************************************
  76  Catch a sighup.
  77 ****************************************************************************/
  78
  79 static void sig_hup(int sig)
  80 {
  81         reload_after_sighup = 1;
  82         sys_select_signal(SIGHUP);
  83 }
  84
  85 /****************************************************************************
  86   Send a SIGTERM to our process group.
  87 *****************************************************************************/
  88
  89 static void  killkids(void)
  90 {
  91         if(am_parent) kill(0,SIGTERM);
  92 }
  93
  94 /****************************************************************************
  95  Process a sam sync message - not sure whether to do this here or
  96  somewhere else.
  97 ****************************************************************************/
  98
  99 static void msg_sam_sync(int UNUSED(msg_type), struct process_id UNUSED(pid),
 100                          void *UNUSED(buf), size_t UNUSED(len))
 101 {
 102         DEBUG(10, ("** sam sync message received, ignoring\n"));
 103 }
 104
 105 /****************************************************************************
 106  Process a sam sync replicate message - not sure whether to do this here or
 107  somewhere else.
 108 ****************************************************************************/
 109
 110 static void msg_sam_repl(int msg_type, struct process_id pid,
 111                          void *buf, size_t len)
 112 {
 113         uint32 low_serial;
 114
 115         if (len != sizeof(uint32))
 116                 return;
 117
 118         low_serial = *((uint32 *)buf);
 119
 120         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 121                   low_serial));
 122 }
 123
 124 /****************************************************************************
 125  Open the socket communication - inetd.
 126 ****************************************************************************/
 127
 128 static BOOL open_sockets_inetd(void)
 129 {
 130         /* Started from inetd. fd 0 is the socket. */
 131         /* We will abort gracefully when the client or remote system
 132            goes away */
 133         smbd_set_server_fd(dup(0));
 134
 135         /* close our standard file descriptors */
 136         close_low_fds(False); /* Don't close stderr */
 137
 138         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 139         set_socket_options(smbd_server_fd(), user_socket_options);
 140
 141         return True;
 142 }
 143
 144 static void msg_exit_server(int msg_type, struct process_id src,
 145                             void *buf, size_t len)
 146 {
 147         exit_server("Got a SHUTDOWN message");
 148 }
 149
 150
 151 /****************************************************************************
 152  Have we reached the process limit ?
 153 ****************************************************************************/
 154
 155 static BOOL allowable_number_of_smbd_processes(void)
 156 {
 157         int max_processes = lp_max_smbd_processes();
 158
 159         if (!max_processes)
 160                 return True;
 161
 162         {
 163                 TDB_CONTEXT *tdb = conn_tdb_ctx();
 164                 int32 val;
 165                 if (!tdb) {
 166                         DEBUG(0,("allowable_number_of_smbd_processes: can't open connection tdb.\n" ));
 167                         return False;
 168                 }
 169
 170                 val = tdb_fetch_int32(tdb, "INFO/total_smbds");
 171                 if (val == -1 && (tdb_error(tdb) != TDB_ERR_NOEXIST)) {
 172                         DEBUG(0,("allowable_number_of_smbd_processes: can't fetch INFO/total_smbds. Error %s\n",
 173                                 tdb_errorstr(tdb) ));
 174                         return False;
 175                 }
 176                 if (val > max_processes) {
 177                         DEBUG(0,("allowable_number_of_smbd_processes: number of processes (%d) is over allowed limit (%d)\n",
 178                                 val, max_processes ));
 179                         return False;
 180                 }
 181         }
 182         return True;
 183 }
 184
 185 /****************************************************************************
 186  Open the socket communication.
 187 ****************************************************************************/
 188
 189 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 190 {
 191         int num_interfaces = iface_count();
 192         int num_sockets = 0;
 193         int fd_listenset[FD_SETSIZE];
 194         fd_set listen_set;
 195         int s;
 196         int maxfd = 0;
 197         int i;
 198         char *ports;
 199
 200         if (!is_daemon) {
 201                 return open_sockets_inetd();
 202         }
 203
 204
 205 #ifdef HAVE_ATEXIT
 206         {
 207                 static int atexit_set;
 208                 if(atexit_set == 0) {
 209                         atexit_set=1;
 210                         atexit(killkids);
 211                 }
 212         }
 213 #endif
 214
 215         /* Stop zombies */
 216         CatchChild();
 217
 218         FD_ZERO(&listen_set);
 219
 220         /* use a reasonable default set of ports - listing on 445 and 139 */
 221         if (!smb_ports) {
 222                 ports = lp_smb_ports();
 223                 if (!ports || !*ports) {
 224                         ports = smb_xstrdup(SMB_PORTS);
 225                 } else {
 226                         ports = smb_xstrdup(ports);
 227                 }
 228         } else {
 229                 ports = smb_xstrdup(smb_ports);
 230         }
 231
 232         if (lp_interfaces() && lp_bind_interfaces_only()) {
 233                 /* We have been given an interfaces line, and been
 234                    told to only bind to those interfaces. Create a
 235                    socket per interface and bind to only these.
 236                 */
 237
 238                 /* Now open a listen socket for each of the
 239                    interfaces. */
 240                 for(i = 0; i < num_interfaces; i++) {
 241                         struct in_addr *ifip = iface_n_ip(i);
 242                         fstring tok;
 243                         const char *ptr;
 244
 245                         if(ifip == NULL) {
 246                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 247                                 continue;
 248                         }
 249
 250                         for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 251                                 unsigned port = atoi(tok);
 252                                 if (port == 0) {
 253                                         continue;
 254                                 }
 255                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 256                                 if(s == -1)
 257                                         return False;
 258
 259                                 /* ready to listen */
 260                                 set_socket_options(s,"SO_KEEPALIVE");
 261                                 set_socket_options(s,user_socket_options);
 262
 263                                 /* Set server socket to non-blocking for the accept. */
 264                                 set_blocking(s,False);
 265
 266                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 267                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 268                                         close(s);
 269                                         return False;
 270                                 }
 271                                 FD_SET(s,&listen_set);
 272                                 maxfd = MAX( maxfd, s);
 273
 274                                 num_sockets++;
 275                                 if (num_sockets >= FD_SETSIZE) {
 276                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 277                                         return False;
 278                                 }
 279                         }
 280                 }
 281         } else {
 282                 /* Just bind to 0.0.0.0 - accept connections
 283                    from anywhere. */
 284
 285                 fstring tok;
 286                 const char *ptr;
 287
 288                 num_interfaces = 1;
 289
 290                 for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 291                         unsigned port = atoi(tok);
 292                         if (port == 0) continue;
 293                         /* open an incoming socket */
 294                         s = open_socket_in(SOCK_STREAM, port, 0,
 295                                            interpret_addr(lp_socket_address()),True);
 296                         if (s == -1)
 297                                 return(False);
 298
 299                         /* ready to listen */
 300                         set_socket_options(s,"SO_KEEPALIVE");
 301                         set_socket_options(s,user_socket_options);
 302
 303                         /* Set server socket to non-blocking for the accept. */
 304                         set_blocking(s,False);
 305
 306                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 307                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 308                                          strerror(errno)));
 309                                 close(s);
 310                                 return False;
 311                         }
 312
 313                         fd_listenset[num_sockets] = s;
 314                         FD_SET(s,&listen_set);
 315                         maxfd = MAX( maxfd, s);
 316
 317                         num_sockets++;
 318
 319                         if (num_sockets >= FD_SETSIZE) {
 320                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 321                                 return False;
 322                         }
 323                 }
 324         }
 325
 326         SAFE_FREE(ports);
 327
 328         /* Listen to messages */
 329
 330         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 331         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 332         message_register(MSG_SHUTDOWN, msg_exit_server);
 333         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 334
 335         /* now accept incoming connections - forking a new process
 336            for each incoming connection */
 337         DEBUG(2,("waiting for a connection\n"));
 338         while (1) {
 339                 fd_set lfds;
 340                 int num;
 341
 342                 /* Free up temporary memory from the main smbd. */
 343                 lp_talloc_free();
 344
 345                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 346                 message_dispatch();
 347
 348                 memcpy((char *)&lfds, (char *)&listen_set,
 349                        sizeof(listen_set));
 350
 351                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 352
 353                 if (num == -1 && errno == EINTR) {
 354                         if (got_sig_term) {
 355                                 exit_server("Caught TERM signal");
 356                         }
 357
 358                         /* check for sighup processing */
 359                         if (reload_after_sighup) {
 360                                 change_to_root_user();
 361                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 362                                 reload_services(False);
 363                                 reload_after_sighup = 0;
 364                         }
 365
 366                         continue;
 367                 }
 368
 369                 /* check if we need to reload services */
 370                 check_reload(time(NULL));
 371
 372                 /* Find the sockets that are read-ready -
 373                    accept on these. */
 374                 for( ; num > 0; num--) {
 375                         struct sockaddr addr;
 376                         socklen_t in_addrlen = sizeof(addr);
 377
 378                         s = -1;
 379                         for(i = 0; i < num_sockets; i++) {
 380                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 381                                         s = fd_listenset[i];
 382                                         /* Clear this so we don't look
 383                                            at it again. */
 384                                         FD_CLR(fd_listenset[i],&lfds);
 385                                         break;
 386                                 }
 387                         }
 388
 389                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 390
 391                         if (smbd_server_fd() == -1 && errno == EINTR)
 392                                 continue;
 393
 394                         if (smbd_server_fd() == -1) {
 395                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 396                                          strerror(errno)));
 397                                 continue;
 398                         }
 399
 400                         /* Ensure child is set to blocking mode */
 401                         set_blocking(smbd_server_fd(),True);
 402
 403                         if (smbd_server_fd() != -1 && interactive)
 404                                 return True;
 405
 406                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 407                                 /* Child code ... */
 408
 409                                 /* close the listening socket(s) */
 410                                 for(i = 0; i < num_sockets; i++)
 411                                         close(fd_listenset[i]);
 412
 413                                 /* close our standard file
 414                                    descriptors */
 415                                 close_low_fds(False);
 416                                 am_parent = 0;
 417
 418                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 419                                 set_socket_options(smbd_server_fd(),user_socket_options);
 420
 421                                 /* this is needed so that we get decent entries
 422                                    in smbstatus for port 445 connects */
 423                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 424
 425                                 /* Reset the state of the random
 426                                  * number generation system, so
 427                                  * children do not get the same random
 428                                  * numbers as each other */
 429
 430                                 set_need_random_reseed();
 431                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 432                                 if (tdb_reopen_all() == -1) {
 433                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 434                                         smb_panic("tdb_reopen_all failed.");
 435                                 }
 436
 437                                 return True;
 438                         }
 439                         /* The parent doesn't need this socket */
 440                         close(smbd_server_fd());
 441
 442                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 443                                 Clear the closed fd info out of server_fd --
 444                                 and more importantly, out of client_fd in
 445                                 util_sock.c, to avoid a possible
 446                                 getpeername failure if we reopen the logs
 447                                 and use %I in the filename.
 448                         */
 449
 450                         smbd_set_server_fd(-1);
 451
 452                         /* Force parent to check log size after
 453                          * spawning child.  Fix from
 454                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 455                          * parent smbd will log to logserver.smb.  It
 456                          * writes only two messages for each child
 457                          * started/finished. But each child writes,
 458                          * say, 50 messages also in logserver.smb,
 459                          * begining with the debug_count of the
 460                          * parent, before the child opens its own log
 461                          * file logserver.client. In a worst case
 462                          * scenario the size of logserver.smb would be
 463                          * checked after about 50*50=2500 messages
 464                          * (ca. 100kb).
 465                          * */
 466                         force_check_log_size();
 467
 468                 } /* end for num */
 469         } /* end while 1 */
 470
 471 /* NOTREACHED   return True; */
 472 }
 473
 474 /****************************************************************************
 475  Reload printers
 476 **************************************************************************/
 477 void reload_printers(void)
 478 {
 479         int snum;
 480         int n_services = lp_numservices();
 481         int pnum = lp_servicenumber(PRINTERS_NAME);
 482         const char *pname;
 483
 484         pcap_cache_reload();
 485
 486         /* remove stale printers */
 487         for (snum = 0; snum < n_services; snum++) {
 488                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 489                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 490                                       lp_autoloaded(snum)))
 491                         continue;
 492
 493                 pname = lp_printername(snum);
 494                 if (!pcap_printername_ok(pname)) {
 495                         DEBUG(3, ("removing stale printer %s\n", pname));
 496
 497                         if (is_printer_published(NULL, snum, NULL))
 498                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 499                         del_a_printer(pname);
 500                         lp_killservice(snum);
 501                 }
 502         }
 503
 504         load_printers();
 505 }
 506
 507 /****************************************************************************
 508  Reload the services file.
 509 **************************************************************************/
 510
 511 BOOL reload_services(BOOL test)
 512 {
 513         BOOL ret;
 514
 515         if (lp_loaded()) {
 516                 pstring fname;
 517                 pstrcpy(fname,lp_configfile());
 518                 if (file_exist(fname, NULL) &&
 519                     !strcsequal(fname, dyn_CONFIGFILE)) {
 520                         pstrcpy(dyn_CONFIGFILE, fname);
 521                         test = False;
 522                 }
 523         }
 524
 525         reopen_logs();
 526
 527         if (test && !lp_file_list_changed())
 528                 return(True);
 529
 530         lp_killunused(conn_snum_used);
 531
 532         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 533
 534         reload_printers();
 535
 536         /* perhaps the config filename is now set */
 537         if (!test)
 538                 reload_services(True);
 539
 540         reopen_logs();
 541
 542         load_interfaces();
 543
 544         if (smbd_server_fd() != -1) {
 545                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 546                 set_socket_options(smbd_server_fd(), user_socket_options);
 547         }
 548
 549         mangle_reset_cache();
 550         reset_stat_cache();
 551
 552         /* this forces service parameters to be flushed */
 553         set_current_service(NULL,0,True);
 554
 555         return(ret);
 556 }
 557
 558
 559 #if DUMP_CORE
 560 /*******************************************************************
 561 prepare to dump a core file - carefully!
 562 ********************************************************************/
 563 static BOOL dump_core(void)
 564 {
 565         char *p;
 566         pstring dname;
 567
 568         pstrcpy(dname,lp_logfile());
 569         if ((p=strrchr_m(dname,'/'))) *p=0;
 570         pstrcat(dname,"/corefiles");
 571         mkdir(dname,0700);
 572         sys_chown(dname,getuid(),getgid());
 573         chmod(dname,0700);
 574         if (chdir(dname)) return(False);
 575         umask(~(0700));
 576
 577 #ifdef HAVE_GETRLIMIT
 578 #ifdef RLIMIT_CORE
 579         {
 580                 struct rlimit rlp;
 581                 getrlimit(RLIMIT_CORE, &rlp);
 582                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 583                 setrlimit(RLIMIT_CORE, &rlp);
 584                 getrlimit(RLIMIT_CORE, &rlp);
 585                 DEBUG(3,("Core limits now %d %d\n",
 586                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 587         }
 588 #endif
 589 #endif
 590
 591
 592         DEBUG(0,("Dumping core in %s\n", dname));
 593         /* Ensure we don't have a signal handler for abort. */
 594 #ifdef SIGABRT
 595         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 596 #endif
 597         abort();
 598         return(True);
 599 }
 600 #endif
 601
 602 /****************************************************************************
 603  Exit the server.
 604 ****************************************************************************/
 605
 606 void exit_server(const char *reason)
 607 {
 608         static int firsttime=1;
 609
 610         if (!firsttime)
 611                 exit(0);
 612         firsttime = 0;
 613
 614         change_to_root_user();
 615         DEBUG(2,("Closing connections\n"));
 616
 617         if (negprot_global_auth_context) {
 618                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 619         }
 620
 621         conn_close_all();
 622
 623         invalidate_all_vuids();
 624
 625         print_notify_send_messages(3); /* 3 second timeout. */
 626
 627         /* delete our entry in the connections database. */
 628         yield_connection(NULL,"");
 629
 630         respond_to_all_remaining_local_messages();
 631         decrement_smbd_process_count();
 632
 633 #ifdef WITH_DFS
 634         if (dcelogin_atmost_once) {
 635                 dfs_unlogin();
 636         }
 637 #endif
 638
 639         if (!reason) {
 640                 int oldlevel = DEBUGLEVEL;
 641                 char *last_inbuf = get_InBuffer();
 642                 DEBUGLEVEL = 10;
 643                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 644                 if (last_inbuf)
 645                         show_msg(last_inbuf);
 646                 DEBUGLEVEL = oldlevel;
 647                 DEBUG(0,("===============================================================\n"));
 648 #if DUMP_CORE
 649                 if (dump_core()) return;
 650 #endif
 651         }
 652
 653         locking_end();
 654         printing_end();
 655
 656         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 657         exit(0);
 658 }
 659
 660 /****************************************************************************
 661  Initialise connect, service and file structs.
 662 ****************************************************************************/
 663
 664 static BOOL init_structs(void )
 665 {
 666         /*
 667          * Set the machine NETBIOS name if not already
 668          * set from the config file.
 669          */
 670
 671         if (!init_names())
 672                 return False;
 673
 674         conn_init();
 675
 676         file_init();
 677
 678         /* for RPC pipes */
 679         init_rpc_pipe_hnd();
 680
 681         init_dptrs();
 682
 683         secrets_init();
 684
 685         return True;
 686 }
 687
 688 /****************************************************************************
 689  main program.
 690 ****************************************************************************/
 691
 692 /* Declare prototype for build_options() to avoid having to run it through
 693    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 694    prototype generation system is too complicated. */
 695
 696 void build_options(BOOL screen);
 697
 698  int main(int argc,const char *argv[])
 699 {
 700         /* shall I run as a daemon */
 701         static BOOL is_daemon = False;
 702         static BOOL interactive = False;
 703         static BOOL Fork = True;
 704         static BOOL log_stdout = False;
 705         static char *ports = NULL;
 706         int opt;
 707         poptContext pc;
 708
 709         struct poptOption long_options[] = {
 710                 POPT_AUTOHELP
 711         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 712         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 713         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 714         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 715         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 716         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 717         POPT_COMMON_SAMBA
 718         { NULL }
 719         };
 720
 721         load_case_tables();
 722
 723 #ifdef HAVE_SET_AUTH_PARAMETERS
 724         set_auth_parameters(argc,argv);
 725 #endif
 726
 727         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 728
 729         while((opt = poptGetNextOpt(pc)) != -1) {
 730                 switch (opt)  {
 731                 case 'b':
 732                         build_options(True); /* Display output to screen as well as debug */
 733                         exit(0);
 734                         break;
 735                 }
 736         }
 737
 738         poptFreeContext(pc);
 739
 740 #ifdef HAVE_SETLUID
 741         /* needed for SecureWare on SCO */
 742         setluid(0);
 743 #endif
 744
 745         sec_init();
 746
 747         set_remote_machine_name("smbd", False);
 748
 749         if (interactive) {
 750                 Fork = False;
 751                 log_stdout = True;
 752         }
 753
 754         if (interactive && (DEBUGLEVEL >= 9)) {
 755                 talloc_enable_leak_report();
 756         }
 757
 758         if (log_stdout && Fork) {
 759                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 760                 exit(1);
 761         }
 762
 763         setup_logging(argv[0],log_stdout);
 764
 765         /* we want to re-seed early to prevent time delays causing
 766            client problems at a later date. (tridge) */
 767         generate_random_buffer(NULL, 0);
 768
 769         /* make absolutely sure we run as root - to handle cases where people
 770            are crazy enough to have it setuid */
 771
 772         gain_root_privilege();
 773         gain_root_group_privilege();
 774
 775         fault_setup((void (*)(void *))exit_server);
 776         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 777         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 778
 779         /* we are never interested in SIGPIPE */
 780         BlockSignals(True,SIGPIPE);
 781
 782 #if defined(SIGFPE)
 783         /* we are never interested in SIGFPE */
 784         BlockSignals(True,SIGFPE);
 785 #endif
 786
 787 #if defined(SIGUSR2)
 788         /* We are no longer interested in USR2 */
 789         BlockSignals(True,SIGUSR2);
 790 #endif
 791
 792         /* POSIX demands that signals are inherited. If the invoking process has
 793          * these signals masked, we will have problems, as we won't recieve them. */
 794         BlockSignals(False, SIGHUP);
 795         BlockSignals(False, SIGUSR1);
 796         BlockSignals(False, SIGTERM);
 797
 798         /* we want total control over the permissions on created files,
 799            so set our umask to 0 */
 800         umask(0);
 801
 802         init_sec_ctx();
 803
 804         reopen_logs();
 805
 806         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 807         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 808
 809         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 810                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 811
 812         /* Output the build options to the debug log */
 813         build_options(False);
 814
 815         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 816                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 817                 exit(1);
 818         }
 819
 820         /*
 821          * Do this before reload_services.
 822          */
 823
 824         if (!reload_services(False))
 825                 return(-1);
 826
 827         init_structs();
 828
 829         if (!init_guest_info())
 830                 return -1;
 831
 832 #ifdef WITH_PROFILE
 833         if (!profile_setup(False)) {
 834                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 835                 return -1;
 836         }
 837 #endif
 838
 839         DEBUG(3,( "loaded services\n"));
 840
 841         if (!is_daemon && !is_a_socket(0)) {
 842                 if (!interactive)
 843                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 844
 845                 /*
 846                  * Setting is_daemon here prevents us from eventually calling
 847                  * the open_sockets_inetd()
 848                  */
 849
 850                 is_daemon = True;
 851         }
 852
 853         if (is_daemon && !interactive) {
 854                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 855                 become_daemon(Fork);
 856         }
 857
 858 #if HAVE_SETPGID
 859         /*
 860          * If we're interactive we want to set our own process group for
 861          * signal management.
 862          */
 863         if (interactive)
 864                 setpgid( (pid_t)0, (pid_t)0);
 865 #endif
 866
 867         if (!directory_exist(lp_lockdir(), NULL))
 868                 mkdir(lp_lockdir(), 0755);
 869
 870         if (is_daemon)
 871                 pidfile_create("smbd");
 872
 873         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 874         if (!message_init())
 875                 exit(1);
 876
 877         if (!session_init())
 878                 exit(1);
 879
 880         if (conn_tdb_ctx() == NULL)
 881                 exit(1);
 882
 883         if (!locking_init(0))
 884                 exit(1);
 885
 886         if (!share_info_db_init())
 887                 exit(1);
 888
 889         namecache_enable();
 890
 891         if (!init_registry())
 892                 exit(1);
 893
 894 #if 0
 895         if (!init_svcctl_db())
 896                 exit(1);
 897 #endif
 898
 899         if (!print_backend_init())
 900                 exit(1);
 901
 902         /* Setup the main smbd so that we can get messages. */
 903         /* don't worry about general printing messages here */
 904
 905         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 906
 907         /* only start the background queue daemon if we are
 908            running as a daemon -- bad things will happen if
 909            smbd is launched via inetd and we fork a copy of
 910            ourselves here */
 911
 912         if ( is_daemon && !interactive )
 913                 start_background_queue();
 914
 915         if (!open_sockets_smbd(is_daemon, interactive, ports))
 916                 exit(1);
 917
 918         /*
 919          * everything after this point is run after the fork()
 920          */
 921
 922 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
 923         /* On Linux we lose the ability to dump core when we change our user
 924          * ID. We know how to dump core safely, so let's make sure we have our
 925          * dumpable flag set.
 926          */
 927         prctl(PR_SET_DUMPABLE, 1);
 928 #endif
 929
 930         /* Initialise the password backed before the global_sam_sid
 931            to ensure that we fetch from ldap before we make a domain sid up */
 932
 933         if(!initialize_password_db(False))
 934                 exit(1);
 935
 936         if(!get_global_sam_sid()) {
 937                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 938                 exit(1);
 939         }
 940
 941         static_init_rpc;
 942
 943         init_modules();
 944
 945         /* possibly reload the services file. */
 946         reload_services(True);
 947
 948         if (!init_account_policy()) {
 949                 DEBUG(0,("Could not open account policy tdb.\n"));
 950                 exit(1);
 951         }
 952
 953         if (*lp_rootdir()) {
 954                 if (sys_chroot(lp_rootdir()) == 0)
 955                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 956         }
 957
 958         /* Setup oplocks */
 959         if (!init_oplocks())
 960                 exit(1);
 961
 962         /* Setup change notify */
 963         if (!init_change_notify())
 964                 exit(1);
 965
 966         /* Setup aio signal handler. */
 967         initialize_async_io_handler();
 968
 969         /* re-initialise the timezone */
 970         TimeInit();
 971
 972         /* register our message handlers */
 973         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 974
 975         smbd_process();
 976
 977         namecache_shutdown();
 978
 979         exit_server("normal exit");
 980         return(0);
 981 }