source3/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) James Peach                    2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 static_decl_rpc;
  27
  28 static int am_parent = 1;
  29
  30 /* the last message the was processed */
  31 int last_message = -1;
  32
  33 /* a useful macro to debug the last message processed */
  34 #define LAST_MESSAGE() smb_fn_name(last_message)
  35
  36 extern struct auth_context *negprot_global_auth_context;
  37 extern pstring user_socket_options;
  38 extern SIG_ATOMIC_T got_sig_term;
  39 extern SIG_ATOMIC_T reload_after_sighup;
  40 static SIG_ATOMIC_T got_sig_cld;
  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 struct event_context *smbd_event_context(void)
  66 {
  67         static struct event_context *ctx;
  68
  69         if (!ctx && !(ctx = event_context_init(NULL))) {
  70                 smb_panic("Could not init smbd event context\n");
  71         }
  72         return ctx;
  73 }
  74
  75 struct messaging_context *smbd_messaging_context(void)
  76 {
  77         static struct messaging_context *ctx;
  78
  79         if (!ctx && !(ctx = messaging_init(NULL, server_id_self(),
  80                                            smbd_event_context()))) {
  81                 smb_panic("Could not init smbd messaging context\n");
  82         }
  83         return ctx;
  84 }
  85
  86 /*******************************************************************
  87  What to do when smb.conf is updated.
  88  ********************************************************************/
  89
  90 static void smb_conf_updated(int msg_type, struct server_id src,
  91                              void *buf, size_t len, void *private_data)
  92 {
  93         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was updated. Reloading.\n"));
  94         reload_services(False);
  95 }
  96
  97
  98 /*******************************************************************
  99  Delete a statcache entry.
 100  ********************************************************************/
 101
 102 static void smb_stat_cache_delete(int msg_type, struct server_id src,
 103                                   void *buf, size_t len, void *private_data)
 104 {
 105         const char *name = (const char *)buf;
 106         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 107         stat_cache_delete(name);
 108 }
 109
 110 /****************************************************************************
 111  Terminate signal.
 112 ****************************************************************************/
 113
 114 static void sig_term(void)
 115 {
 116         got_sig_term = 1;
 117         sys_select_signal(SIGTERM);
 118 }
 119
 120 /****************************************************************************
 121  Catch a sighup.
 122 ****************************************************************************/
 123
 124 static void sig_hup(int sig)
 125 {
 126         reload_after_sighup = 1;
 127         sys_select_signal(SIGHUP);
 128 }
 129
 130 /****************************************************************************
 131  Catch a sigcld
 132 ****************************************************************************/
 133 static void sig_cld(int sig)
 134 {
 135         got_sig_cld = 1;
 136         sys_select_signal(SIGCLD);
 137 }
 138
 139 /****************************************************************************
 140   Send a SIGTERM to our process group.
 141 *****************************************************************************/
 142
 143 static void  killkids(void)
 144 {
 145         if(am_parent) kill(0,SIGTERM);
 146 }
 147
 148 /****************************************************************************
 149  Process a sam sync message - not sure whether to do this here or
 150  somewhere else.
 151 ****************************************************************************/
 152
 153 static void msg_sam_sync(int UNUSED(msg_type), struct server_id UNUSED(pid),
 154                          void *UNUSED(buf), size_t UNUSED(len),
 155                          void *private_data)
 156 {
 157         DEBUG(10, ("** sam sync message received, ignoring\n"));
 158 }
 159
 160 /****************************************************************************
 161  Process a sam sync replicate message - not sure whether to do this here or
 162  somewhere else.
 163 ****************************************************************************/
 164
 165 static void msg_sam_repl(int msg_type, struct server_id pid,
 166                          void *buf, size_t len, void *private_data)
 167 {
 168         uint32 low_serial;
 169
 170         if (len != sizeof(uint32))
 171                 return;
 172
 173         low_serial = *((uint32 *)buf);
 174
 175         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 176                   low_serial));
 177 }
 178
 179 /****************************************************************************
 180  Open the socket communication - inetd.
 181 ****************************************************************************/
 182
 183 static BOOL open_sockets_inetd(void)
 184 {
 185         /* Started from inetd. fd 0 is the socket. */
 186         /* We will abort gracefully when the client or remote system
 187            goes away */
 188         smbd_set_server_fd(dup(0));
 189
 190         /* close our standard file descriptors */
 191         close_low_fds(False); /* Don't close stderr */
 192
 193         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 194         set_socket_options(smbd_server_fd(), user_socket_options);
 195
 196         return True;
 197 }
 198
 199 static void msg_exit_server(int msg_type, struct server_id src,
 200                             void *buf, size_t len, void *private_data)
 201 {
 202         DEBUG(3, ("got a SHUTDOWN message\n"));
 203         exit_server_cleanly(NULL);
 204 }
 205
 206 #ifdef DEVELOPER
 207 static void msg_inject_fault(int msg_type, struct server_id src,
 208                             void *buf, size_t len, void *private_data)
 209 {
 210         int sig;
 211
 212         if (len != sizeof(int)) {
 213
 214                 DEBUG(0, ("Process %llu sent bogus signal injection request\n",
 215                         (unsigned long long)src.pid));
 216                 return;
 217         }
 218
 219         sig = *(int *)buf;
 220         if (sig == -1) {
 221                 exit_server("internal error injected");
 222                 return;
 223         }
 224
 225 #if HAVE_STRSIGNAL
 226         DEBUG(0, ("Process %llu requested injection of signal %d (%s)\n",
 227                     (unsigned long long)src.pid, sig, strsignal(sig)));
 228 #else
 229         DEBUG(0, ("Process %llu requested injection of signal %d\n",
 230                     (unsigned long long)src.pid, sig));
 231 #endif
 232
 233         kill(sys_getpid(), sig);
 234 }
 235 #endif /* DEVELOPER */
 236
 237 struct child_pid {
 238         struct child_pid *prev, *next;
 239         pid_t pid;
 240 };
 241
 242 static struct child_pid *children;
 243 static int num_children;
 244
 245 static void add_child_pid(pid_t pid)
 246 {
 247         struct child_pid *child;
 248
 249         if (lp_max_smbd_processes() == 0) {
 250                 /* Don't bother with the child list if we don't care anyway */
 251                 return;
 252         }
 253
 254         child = SMB_MALLOC_P(struct child_pid);
 255         if (child == NULL) {
 256                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 257                 return;
 258         }
 259         child->pid = pid;
 260         DLIST_ADD(children, child);
 261         num_children += 1;
 262 }
 263
 264 static void remove_child_pid(pid_t pid)
 265 {
 266         struct child_pid *child;
 267
 268         if (lp_max_smbd_processes() == 0) {
 269                 /* Don't bother with the child list if we don't care anyway */
 270                 return;
 271         }
 272
 273         for (child = children; child != NULL; child = child->next) {
 274                 if (child->pid == pid) {
 275                         struct child_pid *tmp = child;
 276                         DLIST_REMOVE(children, child);
 277                         SAFE_FREE(tmp);
 278                         num_children -= 1;
 279                         return;
 280                 }
 281         }
 282
 283         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 284 }
 285
 286 /****************************************************************************
 287  Have we reached the process limit ?
 288 ****************************************************************************/
 289
 290 static BOOL allowable_number_of_smbd_processes(void)
 291 {
 292         int max_processes = lp_max_smbd_processes();
 293
 294         if (!max_processes)
 295                 return True;
 296
 297         return num_children < max_processes;
 298 }
 299
 300 /****************************************************************************
 301  Open the socket communication.
 302 ****************************************************************************/
 303
 304 static BOOL open_sockets_smbd(enum smb_server_mode server_mode, const char *smb_ports)
 305 {
 306         int num_sockets = 0;
 307         int fd_listenset[FD_SETSIZE];
 308         fd_set listen_set;
 309         int s;
 310         int maxfd = 0;
 311         int i;
 312         struct timeval idle_timeout = timeval_zero();
 313
 314         if (server_mode == SERVER_MODE_INETD) {
 315                 return open_sockets_inetd();
 316         }
 317
 318 #ifdef HAVE_ATEXIT
 319         {
 320                 static int atexit_set;
 321                 if(atexit_set == 0) {
 322                         atexit_set=1;
 323                         atexit(killkids);
 324                 }
 325         }
 326 #endif
 327
 328         /* Stop zombies */
 329         CatchSignal(SIGCLD, sig_cld);
 330
 331         FD_ZERO(&listen_set);
 332
 333         /* At this point, it doesn't matter what daemon mode we are in, we
 334          * need some sockets to listen on.
 335          */
 336         num_sockets = smbd_sockinit(smb_ports, fd_listenset, &idle_timeout);
 337         if (num_sockets == 0) {
 338                 return False;
 339         }
 340
 341         for (i = 0; i < num_sockets; ++i) {
 342                 FD_SET(fd_listenset[i], &listen_set);
 343                 maxfd = MAX(maxfd, fd_listenset[i]);
 344         }
 345
 346         /* Listen to messages */
 347
 348         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync, NULL);
 349         message_register(MSG_SMB_SAM_REPL, msg_sam_repl, NULL);
 350         message_register(MSG_SHUTDOWN, msg_exit_server, NULL);
 351         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed, NULL);
 352         message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated, NULL);
 353         message_register(MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete,
 354                          NULL);
 355
 356 #ifdef DEVELOPER
 357         message_register(MSG_SMB_INJECT_FAULT, msg_inject_fault, NULL);
 358 #endif
 359
 360         /* now accept incoming connections - forking a new process
 361            for each incoming connection */
 362         DEBUG(2,("waiting for a connection\n"));
 363         while (1) {
 364                 fd_set lfds;
 365                 int num;
 366
 367                 /* Free up temporary memory from the main smbd. */
 368                 lp_TALLOC_FREE();
 369
 370                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 371                 message_dispatch();
 372
 373                 if (got_sig_cld) {
 374                         pid_t pid;
 375                         got_sig_cld = False;
 376
 377                         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 378                                 remove_child_pid(pid);
 379                         }
 380                 }
 381
 382                 memcpy((char *)&lfds, (char *)&listen_set,
 383                        sizeof(listen_set));
 384
 385                 num = sys_select(maxfd+1,&lfds,NULL,NULL,
 386                                  timeval_is_zero(&idle_timeout) ?
 387                                  NULL : &idle_timeout);
 388
 389                 if (num == -1 && errno == EINTR) {
 390                         if (got_sig_term) {
 391                                 exit_server_cleanly(NULL);
 392                         }
 393
 394                         /* check for sighup processing */
 395                         if (reload_after_sighup) {
 396                                 change_to_root_user();
 397                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 398                                 reload_services(False);
 399                                 reload_after_sighup = 0;
 400                         }
 401
 402                         continue;
 403                 }
 404
 405                 /* If the idle timeout fired and we don't have any connected
 406                  * users, exit gracefully. We should be running under a process
 407                  * controller that will restart us if necessry.
 408                  */
 409                 if (num == 0 && count_all_current_connections() == 0) {
 410                         exit_server_cleanly("idle timeout");
 411                 }
 412
 413                 /* check if we need to reload services */
 414                 check_reload(time(NULL));
 415
 416                 /* Find the sockets that are read-ready -
 417                    accept on these. */
 418                 for( ; num > 0; num--) {
 419                         struct sockaddr addr;
 420                         socklen_t in_addrlen = sizeof(addr);
 421                         pid_t child = 0;
 422
 423                         s = -1;
 424                         for(i = 0; i < num_sockets; i++) {
 425                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 426                                         s = fd_listenset[i];
 427                                         /* Clear this so we don't look
 428                                            at it again. */
 429                                         FD_CLR(fd_listenset[i],&lfds);
 430                                         break;
 431                                 }
 432                         }
 433
 434                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 435
 436                         if (smbd_server_fd() == -1 && errno == EINTR)
 437                                 continue;
 438
 439                         if (smbd_server_fd() == -1) {
 440                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 441                                          strerror(errno)));
 442                                 continue;
 443                         }
 444
 445                         /* Ensure child is set to blocking mode */
 446                         set_blocking(smbd_server_fd(),True);
 447
 448                         /* In interactive mode, return with a connected socket.
 449                          * Foreground and daemon modes should fork worker
 450                          * processes.
 451                          */
 452                         if (server_mode == SERVER_MODE_INTERACTIVE) {
 453                                 return True;
 454                         }
 455
 456                         if (allowable_number_of_smbd_processes() &&
 457                             smbd_server_fd() != -1 &&
 458                             ((child = sys_fork())==0)) {
 459                                 /* Child code ... */
 460
 461                                 /* Stop zombies, the parent explicitly handles
 462                                  * them, counting worker smbds. */
 463                                 CatchChild();
 464
 465                                 /* close the listening socket(s) */
 466                                 for(i = 0; i < num_sockets; i++)
 467                                         close(fd_listenset[i]);
 468
 469                                 /* close our standard file
 470                                    descriptors */
 471                                 close_low_fds(False);
 472                                 am_parent = 0;
 473
 474                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 475                                 set_socket_options(smbd_server_fd(),user_socket_options);
 476
 477                                 /* this is needed so that we get decent entries
 478                                    in smbstatus for port 445 connects */
 479                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()),
 480                                                         False);
 481
 482                                 /* Reset the state of the random
 483                                  * number generation system, so
 484                                  * children do not get the same random
 485                                  * numbers as each other */
 486
 487                                 set_need_random_reseed();
 488                                 /* tdb needs special fork handling - remove
 489                                  * CLEAR_IF_FIRST flags */
 490                                 if (tdb_reopen_all(1) == -1) {
 491                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 492                                         smb_panic("tdb_reopen_all failed.");
 493                                 }
 494
 495                                 return True;
 496                         }
 497                         /* The parent doesn't need this socket */
 498                         close(smbd_server_fd());
 499
 500                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 501                                 Clear the closed fd info out of server_fd --
 502                                 and more importantly, out of client_fd in
 503                                 util_sock.c, to avoid a possible
 504                                 getpeername failure if we reopen the logs
 505                                 and use %I in the filename.
 506                         */
 507
 508                         smbd_set_server_fd(-1);
 509
 510                         if (child != 0) {
 511                                 add_child_pid(child);
 512                         }
 513
 514                         /* Force parent to check log size after
 515                          * spawning child.  Fix from
 516                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 517                          * parent smbd will log to logserver.smb.  It
 518                          * writes only two messages for each child
 519                          * started/finished. But each child writes,
 520                          * say, 50 messages also in logserver.smb,
 521                          * begining with the debug_count of the
 522                          * parent, before the child opens its own log
 523                          * file logserver.client. In a worst case
 524                          * scenario the size of logserver.smb would be
 525                          * checked after about 50*50=2500 messages
 526                          * (ca. 100kb).
 527                          * */
 528                         force_check_log_size();
 529
 530                 } /* end for num */
 531         } /* end while 1 */
 532
 533 /* NOTREACHED   return True; */
 534 }
 535
 536 /****************************************************************************
 537  Reload printers
 538 **************************************************************************/
 539 void reload_printers(void)
 540 {
 541         int snum;
 542         int n_services = lp_numservices();
 543         int pnum = lp_servicenumber(PRINTERS_NAME);
 544         const char *pname;
 545
 546         pcap_cache_reload();
 547
 548         /* remove stale printers */
 549         for (snum = 0; snum < n_services; snum++) {
 550                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 551                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 552                                       lp_autoloaded(snum)))
 553                         continue;
 554
 555                 pname = lp_printername(snum);
 556                 if (!pcap_printername_ok(pname)) {
 557                         DEBUG(3, ("removing stale printer %s\n", pname));
 558
 559                         if (is_printer_published(NULL, snum, NULL))
 560                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 561                         del_a_printer(pname);
 562                         lp_killservice(snum);
 563                 }
 564         }
 565
 566         load_printers();
 567 }
 568
 569 /****************************************************************************
 570  Reload the services file.
 571 **************************************************************************/
 572
 573 BOOL reload_services(BOOL test)
 574 {
 575         BOOL ret;
 576
 577         if (lp_loaded()) {
 578                 pstring fname;
 579                 pstrcpy(fname,lp_configfile());
 580                 if (file_exist(fname, NULL) &&
 581                     !strcsequal(fname, dyn_CONFIGFILE)) {
 582                         pstrcpy(dyn_CONFIGFILE, fname);
 583                         test = False;
 584                 }
 585         }
 586
 587         reopen_logs();
 588
 589         if (test && !lp_file_list_changed())
 590                 return(True);
 591
 592         lp_killunused(conn_snum_used);
 593
 594         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
 595
 596         reload_printers();
 597
 598         /* perhaps the config filename is now set */
 599         if (!test)
 600                 reload_services(True);
 601
 602         reopen_logs();
 603
 604         load_interfaces();
 605
 606         if (smbd_server_fd() != -1) {
 607                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 608                 set_socket_options(smbd_server_fd(), user_socket_options);
 609         }
 610
 611         mangle_reset_cache();
 612         reset_stat_cache();
 613
 614         /* this forces service parameters to be flushed */
 615         set_current_service(NULL,0,True);
 616
 617         return(ret);
 618 }
 619
 620 /****************************************************************************
 621  Exit the server.
 622 ****************************************************************************/
 623
 624 /* Reasons for shutting down a server process. */
 625 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 626
 627 static void exit_server_common(enum server_exit_reason how,
 628         const char *const reason) NORETURN_ATTRIBUTE;
 629
 630 static void exit_server_common(enum server_exit_reason how,
 631         const char *const reason)
 632 {
 633         static int firsttime=1;
 634
 635         if (!firsttime)
 636                 exit(0);
 637         firsttime = 0;
 638
 639         change_to_root_user();
 640
 641         if (negprot_global_auth_context) {
 642                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 643         }
 644
 645         conn_close_all();
 646
 647         invalidate_all_vuids();
 648
 649         print_notify_send_messages(3); /* 3 second timeout. */
 650
 651         /* delete our entry in the connections database. */
 652         yield_connection(NULL,"");
 653
 654         respond_to_all_remaining_local_messages();
 655
 656 #ifdef WITH_DFS
 657         if (dcelogin_atmost_once) {
 658                 dfs_unlogin();
 659         }
 660 #endif
 661
 662         locking_end();
 663         printing_end();
 664
 665         server_encryption_shutdown();
 666
 667         if (how != SERVER_EXIT_NORMAL) {
 668                 int oldlevel = DEBUGLEVEL;
 669                 char *last_inbuf = get_InBuffer();
 670
 671                 DEBUGLEVEL = 10;
 672
 673                 DEBUGSEP(0);
 674                 DEBUG(0,("Abnormal server exit: %s\n",
 675                         reason ? reason : "no explanation provided"));
 676                 DEBUGSEP(0);
 677
 678                 log_stack_trace();
 679                 if (last_inbuf) {
 680                         DEBUG(0,("Last message was %s\n", LAST_MESSAGE()));
 681                         show_msg(last_inbuf);
 682                 }
 683
 684                 DEBUGLEVEL = oldlevel;
 685                 dump_core();
 686
 687         } else {
 688                 DEBUG(3,("Server exit (%s)\n",
 689                         (reason ? reason : "normal exit")));
 690         }
 691
 692         exit(0);
 693 }
 694
 695 void exit_server(const char *const explanation)
 696 {
 697         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 698 }
 699
 700 void exit_server_cleanly(const char *const explanation)
 701 {
 702         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 703 }
 704
 705 void exit_server_fault(void)
 706 {
 707         exit_server("critical server fault");
 708 }
 709
 710 /****************************************************************************
 711  Initialise connect, service and file structs.
 712 ****************************************************************************/
 713
 714 static BOOL init_structs(void )
 715 {
 716         /*
 717          * Set the machine NETBIOS name if not already
 718          * set from the config file.
 719          */
 720
 721         if (!init_names())
 722                 return False;
 723
 724         conn_init();
 725
 726         file_init();
 727
 728         /* for RPC pipes */
 729         init_rpc_pipe_hnd();
 730
 731         init_dptrs();
 732
 733         secrets_init();
 734
 735         return True;
 736 }
 737
 738 /*
 739  * Send keepalive packets to our client
 740  */
 741 static BOOL keepalive_fn(const struct timeval *now, void *private_data)
 742 {
 743         if (!send_keepalive(smbd_server_fd())) {
 744                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
 745                 return False;
 746         }
 747         return True;
 748 }
 749
 750 /*
 751  * Do the recurring check if we're idle
 752  */
 753 static BOOL deadtime_fn(const struct timeval *now, void *private_data)
 754 {
 755         if ((conn_num_open() == 0)
 756             || (conn_idle_all(now->tv_sec))) {
 757                 DEBUG( 2, ( "Closing idle connection\n" ) );
 758                 message_send_pid(procid_self(), MSG_SHUTDOWN, NULL, 0, False);
 759                 return False;
 760         }
 761
 762         return True;
 763 }
 764
 765
 766 /****************************************************************************
 767  main program.
 768 ****************************************************************************/
 769
 770 /* Declare prototype for build_options() to avoid having to run it through
 771    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 772    prototype generation system is too complicated. */
 773
 774 extern void build_options(BOOL screen);
 775
 776  int main(int argc,const char *argv[])
 777 {
 778         /* shall I run as a daemon */
 779         BOOL no_process_group = False;
 780         BOOL log_stdout = False;
 781         const char *ports = NULL;
 782         const char *profile_level = NULL;
 783         int opt;
 784         poptContext pc;
 785
 786         enum smb_server_mode server_mode = SERVER_MODE_DAEMON;
 787
 788         struct poptOption long_options[] = {
 789         POPT_AUTOHELP
 790         {"daemon", 'D', POPT_ARG_VAL, &server_mode, SERVER_MODE_DAEMON,
 791                 "Become a daemon (default)" },
 792         {"interactive", 'i', POPT_ARG_VAL, &server_mode, SERVER_MODE_INTERACTIVE,
 793                 "Run interactive (not a daemon)"},
 794         {"foreground", 'F', POPT_ARG_VAL, &server_mode, SERVER_MODE_FOREGROUND,
 795                 "Run daemon in foreground (for daemontools, etc.)" },
 796         {"no-process-group", '\0', POPT_ARG_VAL, &no_process_group, True,
 797                 "Don't create a new process group" },
 798         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 799         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 800         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 801         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
 802         POPT_COMMON_SAMBA
 803         POPT_COMMON_DYNCONFIG
 804         POPT_TABLEEND
 805         };
 806
 807         load_case_tables();
 808
 809         TimeInit();
 810
 811 #ifdef HAVE_SET_AUTH_PARAMETERS
 812         set_auth_parameters(argc,argv);
 813 #endif
 814
 815         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 816
 817         while((opt = poptGetNextOpt(pc)) != -1) {
 818                 switch (opt)  {
 819                 case 'b':
 820                         build_options(True); /* Display output to screen as well as debug */
 821                         exit(0);
 822                         break;
 823                 }
 824         }
 825
 826         poptFreeContext(pc);
 827
 828 #ifdef HAVE_SETLUID
 829         /* needed for SecureWare on SCO */
 830         setluid(0);
 831 #endif
 832
 833         sec_init();
 834
 835         set_remote_machine_name("smbd", False);
 836
 837         if (server_mode == SERVER_MODE_INTERACTIVE) {
 838                 log_stdout = True;
 839                 if (DEBUGLEVEL >= 9) {
 840                         talloc_enable_leak_report();
 841                 }
 842         }
 843
 844         if (log_stdout && server_mode == SERVER_MODE_DAEMON) {
 845                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 846                 exit(1);
 847         }
 848
 849         setup_logging(argv[0],log_stdout);
 850
 851         /* we want to re-seed early to prevent time delays causing
 852            client problems at a later date. (tridge) */
 853         generate_random_buffer(NULL, 0);
 854
 855         /* make absolutely sure we run as root - to handle cases where people
 856            are crazy enough to have it setuid */
 857
 858         gain_root_privilege();
 859         gain_root_group_privilege();
 860
 861         fault_setup((void (*)(void *))exit_server_fault);
 862         dump_core_setup("smbd");
 863
 864         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 865         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 866
 867         /* we are never interested in SIGPIPE */
 868         BlockSignals(True,SIGPIPE);
 869
 870 #if defined(SIGFPE)
 871         /* we are never interested in SIGFPE */
 872         BlockSignals(True,SIGFPE);
 873 #endif
 874
 875 #if defined(SIGUSR2)
 876         /* We are no longer interested in USR2 */
 877         BlockSignals(True,SIGUSR2);
 878 #endif
 879
 880         /* POSIX demands that signals are inherited. If the invoking process has
 881          * these signals masked, we will have problems, as we won't recieve them. */
 882         BlockSignals(False, SIGHUP);
 883         BlockSignals(False, SIGUSR1);
 884         BlockSignals(False, SIGTERM);
 885
 886         /* we want total control over the permissions on created files,
 887            so set our umask to 0 */
 888         umask(0);
 889
 890         init_sec_ctx();
 891
 892         reopen_logs();
 893
 894         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 895         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 896
 897         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 898                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 899
 900         /* Output the build options to the debug log */
 901         build_options(False);
 902
 903         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 904                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 905                 exit(1);
 906         }
 907
 908         /*
 909          * Do this before reload_services.
 910          */
 911
 912         if (!reload_services(False))
 913                 return(-1);
 914
 915         init_structs();
 916
 917 #ifdef WITH_PROFILE
 918         if (!profile_setup(False)) {
 919                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 920                 return -1;
 921         }
 922         if (profile_level != NULL) {
 923                 int pl = atoi(profile_level);
 924                 struct server_id src;
 925
 926                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
 927                 src.pid = getpid();
 928                 set_profile_level(pl, src);
 929         }
 930 #endif
 931
 932         DEBUG(3,( "loaded services\n"));
 933
 934         if (is_a_socket(0)) {
 935                 if (server_mode == SERVER_MODE_DAEMON) {
 936                         DEBUG(0,("standard input is a socket, "
 937                                     "assuming -F option\n"));
 938                 }
 939                 server_mode = SERVER_MODE_INETD;
 940         }
 941
 942         if (server_mode == SERVER_MODE_DAEMON) {
 943                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 944                 become_daemon(True, no_process_group);
 945         } else if (server_mode == SERVER_MODE_FOREGROUND) {
 946                 become_daemon(False, no_process_group);
 947         }
 948
 949 #if HAVE_SETPGID
 950         /*
 951          * If we're interactive we want to set our own process group for
 952          * signal management.
 953          */
 954         if (server_mode == SERVER_MODE_INTERACTIVE && !no_process_group) {
 955                 setpgid( (pid_t)0, (pid_t)0);
 956         }
 957 #endif
 958
 959         if (!directory_exist(lp_lockdir(), NULL))
 960                 mkdir(lp_lockdir(), 0755);
 961
 962         if (server_mode != SERVER_MODE_INETD &&
 963             server_mode != SERVER_MODE_INTERACTIVE) {
 964                 pidfile_create("smbd");
 965         }
 966
 967         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 968         if (!message_init())
 969                 exit(1);
 970
 971         /* Initialise the password backed before the global_sam_sid
 972            to ensure that we fetch from ldap before we make a domain sid up */
 973
 974         if(!initialize_password_db(False, smbd_event_context()))
 975                 exit(1);
 976
 977         if (!secrets_init()) {
 978                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
 979                 exit(1);
 980         }
 981
 982         if(!get_global_sam_sid()) {
 983                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 984                 exit(1);
 985         }
 986
 987         if (!session_init())
 988                 exit(1);
 989
 990         if (conn_tdb_ctx() == NULL)
 991                 exit(1);
 992
 993         if (!locking_init(0))
 994                 exit(1);
 995
 996         namecache_enable();
 997
 998         if (!init_registry())
 999                 exit(1);
1000
1001 #if 0
1002         if (!init_svcctl_db())
1003                 exit(1);
1004 #endif
1005
1006         if (!print_backend_init())
1007                 exit(1);
1008
1009         if (!init_guest_info()) {
1010                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1011                 return -1;
1012         }
1013
1014         /* Setup the main smbd so that we can get messages. */
1015         /* don't worry about general printing messages here */
1016
1017         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
1018
1019         /* only start the background queue daemon if we are
1020            running as a daemon -- bad things will happen if
1021            smbd is launched via inetd and we fork a copy of
1022            ourselves here */
1023         if (server_mode != SERVER_MODE_INETD &&
1024             server_mode != SERVER_MODE_INTERACTIVE) {
1025                 start_background_queue();
1026         }
1027
1028         /* Always attempt to initialize DMAPI. We will only use it later if
1029          * lp_dmapi_support is set on the share, but we need a single global
1030          * session to work with.
1031          */
1032         dmapi_init_session();
1033
1034         if (!open_sockets_smbd(server_mode, ports)) {
1035                 exit(1);
1036         }
1037
1038         /*
1039          * everything after this point is run after the fork()
1040          */
1041
1042         static_init_rpc;
1043
1044         init_modules();
1045
1046         /* Possibly reload the services file. Only worth doing in
1047          * daemon mode. In inetd mode, we know we only just loaded this.
1048          */
1049         if (server_mode != SERVER_MODE_INETD &&
1050             server_mode != SERVER_MODE_INTERACTIVE) {
1051                 reload_services(True);
1052         }
1053
1054         if (!init_account_policy()) {
1055                 DEBUG(0,("Could not open account policy tdb.\n"));
1056                 exit(1);
1057         }
1058
1059         if (*lp_rootdir()) {
1060                 if (sys_chroot(lp_rootdir()) == 0)
1061                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1062         }
1063
1064         /* Setup oplocks */
1065         if (!init_oplocks())
1066                 exit(1);
1067
1068         /* Setup aio signal handler. */
1069         initialize_async_io_handler();
1070
1071         /* register our message handlers */
1072         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis, NULL);
1073
1074         if ((lp_keepalive() != 0)
1075             && !(event_add_idle(smbd_event_context(), NULL,
1076                                 timeval_set(lp_keepalive(), 0),
1077                                 "keepalive", keepalive_fn,
1078                                 NULL))) {
1079                 DEBUG(0, ("Could not add keepalive event\n"));
1080                 exit(1);
1081         }
1082
1083         if (!(event_add_idle(smbd_event_context(), NULL,
1084                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1085                              "deadtime", deadtime_fn, NULL))) {
1086                 DEBUG(0, ("Could not add deadtime event\n"));
1087                 exit(1);
1088         }
1089
1090         smbd_process();
1091
1092         namecache_shutdown();
1093
1094         exit_server_cleanly(NULL);
1095         return(0);
1096 }