git.maemo.org Git - samba/blob - 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
 334         /* now accept incoming connections - forking a new process
 335            for each incoming connection */
 336         DEBUG(2,("waiting for a connection\n"));
 337         while (1) {
 338                 fd_set lfds;
 339                 int num;
 340
 341                 /* Free up temporary memory from the main smbd. */
 342                 lp_talloc_free();
 343
 344                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 345                 message_dispatch();
 346
 347                 memcpy((char *)&lfds, (char *)&listen_set,
 348                        sizeof(listen_set));
 349
 350                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 351
 352                 if (num == -1 && errno == EINTR) {
 353                         if (got_sig_term) {
 354                                 exit_server("Caught TERM signal");
 355                         }
 356
 357                         /* check for sighup processing */
 358                         if (reload_after_sighup) {
 359                                 change_to_root_user();
 360                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 361                                 reload_services(False);
 362                                 reload_after_sighup = 0;
 363                         }
 364
 365                         continue;
 366                 }
 367
 368                 /* check if we need to reload services */
 369                 check_reload(time(NULL));
 370
 371                 /* Find the sockets that are read-ready -
 372                    accept on these. */
 373                 for( ; num > 0; num--) {
 374                         struct sockaddr addr;
 375                         socklen_t in_addrlen = sizeof(addr);
 376
 377                         s = -1;
 378                         for(i = 0; i < num_sockets; i++) {
 379                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 380                                         s = fd_listenset[i];
 381                                         /* Clear this so we don't look
 382                                            at it again. */
 383                                         FD_CLR(fd_listenset[i],&lfds);
 384                                         break;
 385                                 }
 386                         }
 387
 388                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 389
 390                         if (smbd_server_fd() == -1 && errno == EINTR)
 391                                 continue;
 392
 393                         if (smbd_server_fd() == -1) {
 394                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 395                                          strerror(errno)));
 396                                 continue;
 397                         }
 398
 399                         /* Ensure child is set to blocking mode */
 400                         set_blocking(smbd_server_fd(),True);
 401
 402                         if (smbd_server_fd() != -1 && interactive)
 403                                 return True;
 404
 405                         if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) {
 406                                 /* Child code ... */
 407
 408                                 /* close the listening socket(s) */
 409                                 for(i = 0; i < num_sockets; i++)
 410                                         close(fd_listenset[i]);
 411
 412                                 /* close our standard file
 413                                    descriptors */
 414                                 close_low_fds(False);
 415                                 am_parent = 0;
 416
 417                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 418                                 set_socket_options(smbd_server_fd(),user_socket_options);
 419
 420                                 /* this is needed so that we get decent entries
 421                                    in smbstatus for port 445 connects */
 422                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()), False);
 423
 424                                 /* Reset the state of the random
 425                                  * number generation system, so
 426                                  * children do not get the same random
 427                                  * numbers as each other */
 428
 429                                 set_need_random_reseed();
 430                                 /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */
 431                                 if (tdb_reopen_all() == -1) {
 432                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 433                                         smb_panic("tdb_reopen_all failed.");
 434                                 }
 435
 436                                 return True;
 437                         }
 438                         /* The parent doesn't need this socket */
 439                         close(smbd_server_fd());
 440
 441                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 442                                 Clear the closed fd info out of server_fd --
 443                                 and more importantly, out of client_fd in
 444                                 util_sock.c, to avoid a possible
 445                                 getpeername failure if we reopen the logs
 446                                 and use %I in the filename.
 447                         */
 448
 449                         smbd_set_server_fd(-1);
 450
 451                         /* Force parent to check log size after
 452                          * spawning child.  Fix from
 453                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 454                          * parent smbd will log to logserver.smb.  It
 455                          * writes only two messages for each child
 456                          * started/finished. But each child writes,
 457                          * say, 50 messages also in logserver.smb,
 458                          * begining with the debug_count of the
 459                          * parent, before the child opens its own log
 460                          * file logserver.client. In a worst case
 461                          * scenario the size of logserver.smb would be
 462                          * checked after about 50*50=2500 messages
 463                          * (ca. 100kb).
 464                          * */
 465                         force_check_log_size();
 466
 467                 } /* end for num */
 468         } /* end while 1 */
 469
 470 /* NOTREACHED   return True; */
 471 }
 472
 473 /****************************************************************************
 474  Reload printers
 475 **************************************************************************/
 476 void reload_printers(void)
 477 {
 478         int snum;
 479         int n_services = lp_numservices();
 480         int pnum = lp_servicenumber(PRINTERS_NAME);
 481         const char *pname;
 482
 483         pcap_cache_reload();
 484
 485         /* remove stale printers */
 486         for (snum = 0; snum < n_services; snum++) {
 487                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 488                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 489                                       lp_autoloaded(snum)))
 490                         continue;
 491
 492                 pname = lp_printername(snum);
 493                 if (!pcap_printername_ok(pname)) {
 494                         DEBUG(3, ("removing stale printer %s\n", pname));
 495
 496                         if (is_printer_published(NULL, snum, NULL))
 497                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 498                         del_a_printer(pname);
 499                         lp_killservice(snum);
 500                 }
 501         }
 502
 503         load_printers();
 504 }
 505
 506 /****************************************************************************
 507  Reload the services file.
 508 **************************************************************************/
 509
 510 BOOL reload_services(BOOL test)
 511 {
 512         BOOL ret;
 513
 514         if (lp_loaded()) {
 515                 pstring fname;
 516                 pstrcpy(fname,lp_configfile());
 517                 if (file_exist(fname, NULL) &&
 518                     !strcsequal(fname, dyn_CONFIGFILE)) {
 519                         pstrcpy(dyn_CONFIGFILE, fname);
 520                         test = False;
 521                 }
 522         }
 523
 524         reopen_logs();
 525
 526         if (test && !lp_file_list_changed())
 527                 return(True);
 528
 529         lp_killunused(conn_snum_used);
 530
 531         ret = lp_load(dyn_CONFIGFILE, False, False, True);
 532
 533         reload_printers();
 534
 535         /* perhaps the config filename is now set */
 536         if (!test)
 537                 reload_services(True);
 538
 539         reopen_logs();
 540
 541         load_interfaces();
 542
 543         if (smbd_server_fd() != -1) {
 544                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 545                 set_socket_options(smbd_server_fd(), user_socket_options);
 546         }
 547
 548         mangle_reset_cache();
 549         reset_stat_cache();
 550
 551         /* this forces service parameters to be flushed */
 552         set_current_service(NULL,0,True);
 553
 554         return(ret);
 555 }
 556
 557
 558 #if DUMP_CORE
 559 /*******************************************************************
 560 prepare to dump a core file - carefully!
 561 ********************************************************************/
 562 static BOOL dump_core(void)
 563 {
 564         char *p;
 565         pstring dname;
 566
 567         pstrcpy(dname,lp_logfile());
 568         if ((p=strrchr_m(dname,'/'))) *p=0;
 569         pstrcat(dname,"/corefiles");
 570         mkdir(dname,0700);
 571         sys_chown(dname,getuid(),getgid());
 572         chmod(dname,0700);
 573         if (chdir(dname)) return(False);
 574         umask(~(0700));
 575
 576 #ifdef HAVE_GETRLIMIT
 577 #ifdef RLIMIT_CORE
 578         {
 579                 struct rlimit rlp;
 580                 getrlimit(RLIMIT_CORE, &rlp);
 581                 rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur);
 582                 setrlimit(RLIMIT_CORE, &rlp);
 583                 getrlimit(RLIMIT_CORE, &rlp);
 584                 DEBUG(3,("Core limits now %d %d\n",
 585                          (int)rlp.rlim_cur,(int)rlp.rlim_max));
 586         }
 587 #endif
 588 #endif
 589
 590
 591         DEBUG(0,("Dumping core in %s\n", dname));
 592         /* Ensure we don't have a signal handler for abort. */
 593 #ifdef SIGABRT
 594         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
 595 #endif
 596         abort();
 597         return(True);
 598 }
 599 #endif
 600
 601 /****************************************************************************
 602  Exit the server.
 603 ****************************************************************************/
 604
 605 void exit_server(const char *reason)
 606 {
 607         static int firsttime=1;
 608
 609         if (!firsttime)
 610                 exit(0);
 611         firsttime = 0;
 612
 613         change_to_root_user();
 614         DEBUG(2,("Closing connections\n"));
 615
 616         if (negprot_global_auth_context) {
 617                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 618         }
 619
 620         conn_close_all();
 621
 622         invalidate_all_vuids();
 623
 624         print_notify_send_messages(3); /* 3 second timeout. */
 625
 626         /* delete our entry in the connections database. */
 627         yield_connection(NULL,"");
 628
 629         respond_to_all_remaining_local_messages();
 630         decrement_smbd_process_count();
 631
 632 #ifdef WITH_DFS
 633         if (dcelogin_atmost_once) {
 634                 dfs_unlogin();
 635         }
 636 #endif
 637
 638         if (!reason) {
 639                 int oldlevel = DEBUGLEVEL;
 640                 char *last_inbuf = get_InBuffer();
 641                 DEBUGLEVEL = 10;
 642                 DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
 643                 if (last_inbuf)
 644                         show_msg(last_inbuf);
 645                 DEBUGLEVEL = oldlevel;
 646                 DEBUG(0,("===============================================================\n"));
 647 #if DUMP_CORE
 648                 if (dump_core()) return;
 649 #endif
 650         }
 651
 652         locking_end();
 653         printing_end();
 654
 655         DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
 656         exit(0);
 657 }
 658
 659 /****************************************************************************
 660  Initialise connect, service and file structs.
 661 ****************************************************************************/
 662
 663 static BOOL init_structs(void )
 664 {
 665         /*
 666          * Set the machine NETBIOS name if not already
 667          * set from the config file.
 668          */
 669
 670         if (!init_names())
 671                 return False;
 672
 673         conn_init();
 674
 675         file_init();
 676
 677         /* for RPC pipes */
 678         init_rpc_pipe_hnd();
 679
 680         init_dptrs();
 681
 682         secrets_init();
 683
 684         return True;
 685 }
 686
 687 /****************************************************************************
 688  main program.
 689 ****************************************************************************/
 690
 691 /* Declare prototype for build_options() to avoid having to run it through
 692    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 693    prototype generation system is too complicated. */
 694
 695 void build_options(BOOL screen);
 696
 697  int main(int argc,const char *argv[])
 698 {
 699         /* shall I run as a daemon */
 700         static BOOL is_daemon = False;
 701         static BOOL interactive = False;
 702         static BOOL Fork = True;
 703         static BOOL log_stdout = False;
 704         static char *ports = NULL;
 705         int opt;
 706         poptContext pc;
 707
 708         struct poptOption long_options[] = {
 709                 POPT_AUTOHELP
 710         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 711         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 712         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 713         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 714         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 715         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 716         POPT_COMMON_SAMBA
 717         { NULL }
 718         };
 719
 720         load_case_tables();
 721
 722 #ifdef HAVE_SET_AUTH_PARAMETERS
 723         set_auth_parameters(argc,argv);
 724 #endif
 725
 726         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 727
 728         while((opt = poptGetNextOpt(pc)) != -1) {
 729                 switch (opt)  {
 730                 case 'b':
 731                         build_options(True); /* Display output to screen as well as debug */
 732                         exit(0);
 733                         break;
 734                 }
 735         }
 736
 737         poptFreeContext(pc);
 738
 739 #ifdef HAVE_SETLUID
 740         /* needed for SecureWare on SCO */
 741         setluid(0);
 742 #endif
 743
 744         sec_init();
 745
 746         set_remote_machine_name("smbd", False);
 747
 748         if (interactive) {
 749                 Fork = False;
 750                 log_stdout = True;
 751         }
 752
 753         if (interactive && (DEBUGLEVEL >= 9)) {
 754                 talloc_enable_leak_report();
 755         }
 756
 757         if (log_stdout && Fork) {
 758                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 759                 exit(1);
 760         }
 761
 762         setup_logging(argv[0],log_stdout);
 763
 764         /* we want to re-seed early to prevent time delays causing
 765            client problems at a later date. (tridge) */
 766         generate_random_buffer(NULL, 0);
 767
 768         /* make absolutely sure we run as root - to handle cases where people
 769            are crazy enough to have it setuid */
 770
 771         gain_root_privilege();
 772         gain_root_group_privilege();
 773
 774         fault_setup((void (*)(void *))exit_server);
 775         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 776         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 777
 778         /* we are never interested in SIGPIPE */
 779         BlockSignals(True,SIGPIPE);
 780
 781 #if defined(SIGFPE)
 782         /* we are never interested in SIGFPE */
 783         BlockSignals(True,SIGFPE);
 784 #endif
 785
 786 #if defined(SIGUSR2)
 787         /* We are no longer interested in USR2 */
 788         BlockSignals(True,SIGUSR2);
 789 #endif
 790
 791         /* POSIX demands that signals are inherited. If the invoking process has
 792          * these signals masked, we will have problems, as we won't recieve them. */
 793         BlockSignals(False, SIGHUP);
 794         BlockSignals(False, SIGUSR1);
 795         BlockSignals(False, SIGTERM);
 796
 797         /* we want total control over the permissions on created files,
 798            so set our umask to 0 */
 799         umask(0);
 800
 801         init_sec_ctx();
 802
 803         reopen_logs();
 804
 805         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 806         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 807
 808         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 809                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 810
 811         /* Output the build options to the debug log */
 812         build_options(False);
 813
 814         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 815                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 816                 exit(1);
 817         }
 818
 819         /*
 820          * Do this before reload_services.
 821          */
 822
 823         if (!reload_services(False))
 824                 return(-1);
 825
 826         init_structs();
 827
 828         if (!init_guest_info()) {
 829                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
 830                 return -1;
 831         }
 832
 833 #ifdef WITH_PROFILE
 834         if (!profile_setup(False)) {
 835                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 836                 return -1;
 837         }
 838 #endif
 839
 840         DEBUG(3,( "loaded services\n"));
 841
 842         if (!is_daemon && !is_a_socket(0)) {
 843                 if (!interactive)
 844                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 845
 846                 /*
 847                  * Setting is_daemon here prevents us from eventually calling
 848                  * the open_sockets_inetd()
 849                  */
 850
 851                 is_daemon = True;
 852         }
 853
 854         if (is_daemon && !interactive) {
 855                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 856                 become_daemon(Fork);
 857         }
 858
 859 #if HAVE_SETPGID
 860         /*
 861          * If we're interactive we want to set our own process group for
 862          * signal management.
 863          */
 864         if (interactive)
 865                 setpgid( (pid_t)0, (pid_t)0);
 866 #endif
 867
 868         if (!directory_exist(lp_lockdir(), NULL))
 869                 mkdir(lp_lockdir(), 0755);
 870
 871         if (is_daemon)
 872                 pidfile_create("smbd");
 873
 874         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 875         if (!message_init())
 876                 exit(1);
 877
 878         if (!session_init())
 879                 exit(1);
 880
 881         if (conn_tdb_ctx() == NULL)
 882                 exit(1);
 883
 884         if (!locking_init(0))
 885                 exit(1);
 886
 887         if (!share_info_db_init())
 888                 exit(1);
 889
 890         namecache_enable();
 891
 892         if (!init_registry())
 893                 exit(1);
 894
 895 #if 0
 896         if (!init_svcctl_db())
 897                 exit(1);
 898 #endif
 899
 900         if (!print_backend_init())
 901                 exit(1);
 902
 903         /* Setup the main smbd so that we can get messages. */
 904         /* don't worry about general printing messages here */
 905
 906         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
 907
 908         /* only start the background queue daemon if we are
 909            running as a daemon -- bad things will happen if
 910            smbd is launched via inetd and we fork a copy of
 911            ourselves here */
 912
 913         if ( is_daemon && !interactive )
 914                 start_background_queue();
 915
 916         if (!open_sockets_smbd(is_daemon, interactive, ports))
 917                 exit(1);
 918
 919         /*
 920          * everything after this point is run after the fork()
 921          */
 922
 923 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
 924         /* On Linux we lose the ability to dump core when we change our user
 925          * ID. We know how to dump core safely, so let's make sure we have our
 926          * dumpable flag set.
 927          */
 928         prctl(PR_SET_DUMPABLE, 1);
 929 #endif
 930
 931         /* Initialise the password backed before the global_sam_sid
 932            to ensure that we fetch from ldap before we make a domain sid up */
 933
 934         if(!initialize_password_db(False))
 935                 exit(1);
 936
 937         if(!get_global_sam_sid()) {
 938                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 939                 exit(1);
 940         }
 941
 942         static_init_rpc;
 943
 944         init_modules();
 945
 946         /* possibly reload the services file. */
 947         reload_services(True);
 948
 949         if (!init_account_policy()) {
 950                 DEBUG(0,("Could not open account policy tdb.\n"));
 951                 exit(1);
 952         }
 953
 954         if (*lp_rootdir()) {
 955                 if (sys_chroot(lp_rootdir()) == 0)
 956                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
 957         }
 958
 959         /* Setup oplocks */
 960         if (!init_oplocks())
 961                 exit(1);
 962
 963         /* Setup change notify */
 964         if (!init_change_notify())
 965                 exit(1);
 966
 967         /* Setup aio signal handler. */
 968         initialize_async_io_handler();
 969
 970         /* re-initialise the timezone */
 971         TimeInit();
 972
 973         /* register our message handlers */
 974         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
 975
 976         smbd_process();
 977
 978         namecache_shutdown();
 979
 980         exit_server("normal exit");
 981         return(0);
 982 }