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
   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 static_decl_rpc;
  26
  27 static int am_parent = 1;
  28
  29 /* the last message the was processed */
  30 int last_message = -1;
  31
  32 /* a useful macro to debug the last message processed */
  33 #define LAST_MESSAGE() smb_fn_name(last_message)
  34
  35 extern struct auth_context *negprot_global_auth_context;
  36 extern pstring user_socket_options;
  37 extern SIG_ATOMIC_T got_sig_term;
  38 extern SIG_ATOMIC_T reload_after_sighup;
  39 static SIG_ATOMIC_T got_sig_cld;
  40
  41 #ifdef WITH_DFS
  42 extern int dcelogin_atmost_once;
  43 #endif /* WITH_DFS */
  44
  45 /* really we should have a top level context structure that has the
  46    client file descriptor as an element. That would require a major rewrite :(
  47
  48    the following 2 functions are an alternative - they make the file
  49    descriptor private to smbd
  50  */
  51 static int server_fd = -1;
  52
  53 int smbd_server_fd(void)
  54 {
  55         return server_fd;
  56 }
  57
  58 static void smbd_set_server_fd(int fd)
  59 {
  60         server_fd = fd;
  61         client_setfd(fd);
  62 }
  63
  64 /*******************************************************************
  65  What to do when smb.conf is updated.
  66  ********************************************************************/
  67
  68 static void smb_conf_updated(int msg_type, struct process_id src,
  69                              void *buf, size_t len)
  70 {
  71         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was updated. Reloading.\n"));
  72         reload_services(False);
  73 }
  74
  75
  76 /****************************************************************************
  77  Terminate signal.
  78 ****************************************************************************/
  79
  80 static void sig_term(void)
  81 {
  82         got_sig_term = 1;
  83         sys_select_signal(SIGTERM);
  84 }
  85
  86 /****************************************************************************
  87  Catch a sighup.
  88 ****************************************************************************/
  89
  90 static void sig_hup(int sig)
  91 {
  92         reload_after_sighup = 1;
  93         sys_select_signal(SIGHUP);
  94 }
  95
  96 /****************************************************************************
  97  Catch a sigcld
  98 ****************************************************************************/
  99 static void sig_cld(int sig)
 100 {
 101         got_sig_cld = 1;
 102         sys_select_signal(SIGCLD);
 103 }
 104
 105 /****************************************************************************
 106   Send a SIGTERM to our process group.
 107 *****************************************************************************/
 108
 109 static void  killkids(void)
 110 {
 111         if(am_parent) kill(0,SIGTERM);
 112 }
 113
 114 /****************************************************************************
 115  Process a sam sync message - not sure whether to do this here or
 116  somewhere else.
 117 ****************************************************************************/
 118
 119 static void msg_sam_sync(int UNUSED(msg_type), struct process_id UNUSED(pid),
 120                          void *UNUSED(buf), size_t UNUSED(len))
 121 {
 122         DEBUG(10, ("** sam sync message received, ignoring\n"));
 123 }
 124
 125 /****************************************************************************
 126  Process a sam sync replicate message - not sure whether to do this here or
 127  somewhere else.
 128 ****************************************************************************/
 129
 130 static void msg_sam_repl(int msg_type, struct process_id pid,
 131                          void *buf, size_t len)
 132 {
 133         uint32 low_serial;
 134
 135         if (len != sizeof(uint32))
 136                 return;
 137
 138         low_serial = *((uint32 *)buf);
 139
 140         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
 141                   low_serial));
 142 }
 143
 144 /****************************************************************************
 145  Open the socket communication - inetd.
 146 ****************************************************************************/
 147
 148 static BOOL open_sockets_inetd(void)
 149 {
 150         /* Started from inetd. fd 0 is the socket. */
 151         /* We will abort gracefully when the client or remote system
 152            goes away */
 153         smbd_set_server_fd(dup(0));
 154
 155         /* close our standard file descriptors */
 156         close_low_fds(False); /* Don't close stderr */
 157
 158         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 159         set_socket_options(smbd_server_fd(), user_socket_options);
 160
 161         return True;
 162 }
 163
 164 static void msg_exit_server(int msg_type, struct process_id src,
 165                             void *buf, size_t len)
 166 {
 167         DEBUG(3, ("got a SHUTDOWN message\n"));
 168         exit_server_cleanly(NULL);
 169 }
 170
 171 #ifdef DEVELOPER
 172 static void msg_inject_fault(int msg_type, struct process_id src,
 173                             void *buf, size_t len)
 174 {
 175         int sig;
 176
 177         if (len != sizeof(int)) {
 178
 179                 DEBUG(0, ("Process %llu sent bogus signal injection request\n",
 180                         (unsigned long long)src.pid));
 181                 return;
 182         }
 183
 184         sig = *(int *)buf;
 185         if (sig == -1) {
 186                 exit_server("internal error injected");
 187                 return;
 188         }
 189
 190 #if HAVE_STRSIGNAL
 191         DEBUG(0, ("Process %llu requested injection of signal %d (%s)\n",
 192                     (unsigned long long)src.pid, sig, strsignal(sig)));
 193 #else
 194         DEBUG(0, ("Process %llu requested injection of signal %d\n",
 195                     (unsigned long long)src.pid, sig));
 196 #endif
 197
 198         kill(sys_getpid(), sig);
 199 }
 200 #endif /* DEVELOPER */
 201
 202 struct child_pid {
 203         struct child_pid *prev, *next;
 204         pid_t pid;
 205 };
 206
 207 static struct child_pid *children;
 208 static int num_children;
 209
 210 static void add_child_pid(pid_t pid)
 211 {
 212         struct child_pid *child;
 213
 214         if (lp_max_smbd_processes() == 0) {
 215                 /* Don't bother with the child list if we don't care anyway */
 216                 return;
 217         }
 218
 219         child = SMB_MALLOC_P(struct child_pid);
 220         if (child == NULL) {
 221                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 222                 return;
 223         }
 224         child->pid = pid;
 225         DLIST_ADD(children, child);
 226         num_children += 1;
 227 }
 228
 229 static void remove_child_pid(pid_t pid)
 230 {
 231         struct child_pid *child;
 232
 233         if (lp_max_smbd_processes() == 0) {
 234                 /* Don't bother with the child list if we don't care anyway */
 235                 return;
 236         }
 237
 238         for (child = children; child != NULL; child = child->next) {
 239                 if (child->pid == pid) {
 240                         struct child_pid *tmp = child;
 241                         DLIST_REMOVE(children, child);
 242                         SAFE_FREE(tmp);
 243                         num_children -= 1;
 244                         return;
 245                 }
 246         }
 247
 248         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 249 }
 250
 251 /****************************************************************************
 252  Have we reached the process limit ?
 253 ****************************************************************************/
 254
 255 static BOOL allowable_number_of_smbd_processes(void)
 256 {
 257         int max_processes = lp_max_smbd_processes();
 258
 259         if (!max_processes)
 260                 return True;
 261
 262         return num_children < max_processes;
 263 }
 264
 265 /****************************************************************************
 266  Open the socket communication.
 267 ****************************************************************************/
 268
 269 static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports)
 270 {
 271         int num_interfaces = iface_count();
 272         int num_sockets = 0;
 273         int fd_listenset[FD_SETSIZE];
 274         fd_set listen_set;
 275         int s;
 276         int maxfd = 0;
 277         int i;
 278         char *ports;
 279
 280         if (!is_daemon) {
 281                 return open_sockets_inetd();
 282         }
 283
 284
 285 #ifdef HAVE_ATEXIT
 286         {
 287                 static int atexit_set;
 288                 if(atexit_set == 0) {
 289                         atexit_set=1;
 290                         atexit(killkids);
 291                 }
 292         }
 293 #endif
 294
 295         /* Stop zombies */
 296         CatchSignal(SIGCLD, sig_cld);
 297
 298         FD_ZERO(&listen_set);
 299
 300         /* use a reasonable default set of ports - listing on 445 and 139 */
 301         if (!smb_ports) {
 302                 ports = lp_smb_ports();
 303                 if (!ports || !*ports) {
 304                         ports = smb_xstrdup(SMB_PORTS);
 305                 } else {
 306                         ports = smb_xstrdup(ports);
 307                 }
 308         } else {
 309                 ports = smb_xstrdup(smb_ports);
 310         }
 311
 312         if (lp_interfaces() && lp_bind_interfaces_only()) {
 313                 /* We have been given an interfaces line, and been
 314                    told to only bind to those interfaces. Create a
 315                    socket per interface and bind to only these.
 316                 */
 317
 318                 /* Now open a listen socket for each of the
 319                    interfaces. */
 320                 for(i = 0; i < num_interfaces; i++) {
 321                         struct in_addr *ifip = iface_n_ip(i);
 322                         fstring tok;
 323                         const char *ptr;
 324
 325                         if(ifip == NULL) {
 326                                 DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i));
 327                                 continue;
 328                         }
 329
 330                         for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 331                                 unsigned port = atoi(tok);
 332                                 if (port == 0) {
 333                                         continue;
 334                                 }
 335                                 s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
 336                                 if(s == -1)
 337                                         return False;
 338
 339                                 /* ready to listen */
 340                                 set_socket_options(s,"SO_KEEPALIVE");
 341                                 set_socket_options(s,user_socket_options);
 342
 343                                 /* Set server socket to non-blocking for the accept. */
 344                                 set_blocking(s,False);
 345
 346                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 347                                         DEBUG(0,("listen: %s\n",strerror(errno)));
 348                                         close(s);
 349                                         return False;
 350                                 }
 351                                 FD_SET(s,&listen_set);
 352                                 maxfd = MAX( maxfd, s);
 353
 354                                 num_sockets++;
 355                                 if (num_sockets >= FD_SETSIZE) {
 356                                         DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 357                                         return False;
 358                                 }
 359                         }
 360                 }
 361         } else {
 362                 /* Just bind to 0.0.0.0 - accept connections
 363                    from anywhere. */
 364
 365                 fstring tok;
 366                 const char *ptr;
 367
 368                 num_interfaces = 1;
 369
 370                 for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) {
 371                         unsigned port = atoi(tok);
 372                         if (port == 0) continue;
 373                         /* open an incoming socket */
 374                         s = open_socket_in(SOCK_STREAM, port, 0,
 375                                            interpret_addr(lp_socket_address()),True);
 376                         if (s == -1)
 377                                 return(False);
 378
 379                         /* ready to listen */
 380                         set_socket_options(s,"SO_KEEPALIVE");
 381                         set_socket_options(s,user_socket_options);
 382
 383                         /* Set server socket to non-blocking for the accept. */
 384                         set_blocking(s,False);
 385
 386                         if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 387                                 DEBUG(0,("open_sockets_smbd: listen: %s\n",
 388                                          strerror(errno)));
 389                                 close(s);
 390                                 return False;
 391                         }
 392
 393                         fd_listenset[num_sockets] = s;
 394                         FD_SET(s,&listen_set);
 395                         maxfd = MAX( maxfd, s);
 396
 397                         num_sockets++;
 398
 399                         if (num_sockets >= FD_SETSIZE) {
 400                                 DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n"));
 401                                 return False;
 402                         }
 403                 }
 404         }
 405
 406         SAFE_FREE(ports);
 407
 408         /* Listen to messages */
 409
 410         message_register(MSG_SMB_SAM_SYNC, msg_sam_sync);
 411         message_register(MSG_SMB_SAM_REPL, msg_sam_repl);
 412         message_register(MSG_SHUTDOWN, msg_exit_server);
 413         message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 414         message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated);
 415
 416 #ifdef DEVELOPER
 417         message_register(MSG_SMB_INJECT_FAULT, msg_inject_fault);
 418 #endif
 419
 420         /* now accept incoming connections - forking a new process
 421            for each incoming connection */
 422         DEBUG(2,("waiting for a connection\n"));
 423         while (1) {
 424                 fd_set lfds;
 425                 int num;
 426
 427                 /* Free up temporary memory from the main smbd. */
 428                 lp_TALLOC_FREE();
 429
 430                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 431                 message_dispatch();
 432
 433                 if (got_sig_cld) {
 434                         pid_t pid;
 435                         got_sig_cld = False;
 436
 437                         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 438                                 remove_child_pid(pid);
 439                         }
 440                 }
 441
 442                 memcpy((char *)&lfds, (char *)&listen_set,
 443                        sizeof(listen_set));
 444
 445                 num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL);
 446
 447                 if (num == -1 && errno == EINTR) {
 448                         if (got_sig_term) {
 449                                 exit_server_cleanly(NULL);
 450                         }
 451
 452                         /* check for sighup processing */
 453                         if (reload_after_sighup) {
 454                                 change_to_root_user();
 455                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 456                                 reload_services(False);
 457                                 reload_after_sighup = 0;
 458                         }
 459
 460                         continue;
 461                 }
 462
 463                 /* check if we need to reload services */
 464                 check_reload(time(NULL));
 465
 466                 /* Find the sockets that are read-ready -
 467                    accept on these. */
 468                 for( ; num > 0; num--) {
 469                         struct sockaddr addr;
 470                         socklen_t in_addrlen = sizeof(addr);
 471                         pid_t child = 0;
 472
 473                         s = -1;
 474                         for(i = 0; i < num_sockets; i++) {
 475                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
 476                                         s = fd_listenset[i];
 477                                         /* Clear this so we don't look
 478                                            at it again. */
 479                                         FD_CLR(fd_listenset[i],&lfds);
 480                                         break;
 481                                 }
 482                         }
 483
 484                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 485
 486                         if (smbd_server_fd() == -1 && errno == EINTR)
 487                                 continue;
 488
 489                         if (smbd_server_fd() == -1) {
 490                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
 491                                          strerror(errno)));
 492                                 continue;
 493                         }
 494
 495                         /* Ensure child is set to blocking mode */
 496                         set_blocking(smbd_server_fd(),True);
 497
 498                         if (smbd_server_fd() != -1 && interactive)
 499                                 return True;
 500
 501                         if (allowable_number_of_smbd_processes() &&
 502                             smbd_server_fd() != -1 &&
 503                             ((child = sys_fork())==0)) {
 504                                 /* Child code ... */
 505
 506                                 /* Stop zombies, the parent explicitly handles
 507                                  * them, counting worker smbds. */
 508                                 CatchChild();
 509
 510                                 /* close the listening socket(s) */
 511                                 for(i = 0; i < num_sockets; i++)
 512                                         close(fd_listenset[i]);
 513
 514                                 /* close our standard file
 515                                    descriptors */
 516                                 close_low_fds(False);
 517                                 am_parent = 0;
 518
 519                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 520                                 set_socket_options(smbd_server_fd(),user_socket_options);
 521
 522                                 /* this is needed so that we get decent entries
 523                                    in smbstatus for port 445 connects */
 524                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()),
 525                                                         False);
 526
 527                                 /* Reset the state of the random
 528                                  * number generation system, so
 529                                  * children do not get the same random
 530                                  * numbers as each other */
 531
 532                                 set_need_random_reseed();
 533                                 /* tdb needs special fork handling - remove
 534                                  * CLEAR_IF_FIRST flags */
 535                                 if (tdb_reopen_all(1) == -1) {
 536                                         DEBUG(0,("tdb_reopen_all failed.\n"));
 537                                         smb_panic("tdb_reopen_all failed.");
 538                                 }
 539
 540                                 return True;
 541                         }
 542                         /* The parent doesn't need this socket */
 543                         close(smbd_server_fd());
 544
 545                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 546                                 Clear the closed fd info out of server_fd --
 547                                 and more importantly, out of client_fd in
 548                                 util_sock.c, to avoid a possible
 549                                 getpeername failure if we reopen the logs
 550                                 and use %I in the filename.
 551                         */
 552
 553                         smbd_set_server_fd(-1);
 554
 555                         if (child != 0) {
 556                                 add_child_pid(child);
 557                         }
 558
 559                         /* Force parent to check log size after
 560                          * spawning child.  Fix from
 561                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 562                          * parent smbd will log to logserver.smb.  It
 563                          * writes only two messages for each child
 564                          * started/finished. But each child writes,
 565                          * say, 50 messages also in logserver.smb,
 566                          * begining with the debug_count of the
 567                          * parent, before the child opens its own log
 568                          * file logserver.client. In a worst case
 569                          * scenario the size of logserver.smb would be
 570                          * checked after about 50*50=2500 messages
 571                          * (ca. 100kb).
 572                          * */
 573                         force_check_log_size();
 574
 575                 } /* end for num */
 576         } /* end while 1 */
 577
 578 /* NOTREACHED   return True; */
 579 }
 580
 581 /****************************************************************************
 582  Reload printers
 583 **************************************************************************/
 584 void reload_printers(void)
 585 {
 586         int snum;
 587         int n_services = lp_numservices();
 588         int pnum = lp_servicenumber(PRINTERS_NAME);
 589         const char *pname;
 590
 591         pcap_cache_reload();
 592
 593         /* remove stale printers */
 594         for (snum = 0; snum < n_services; snum++) {
 595                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 596                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 597                                       lp_autoloaded(snum)))
 598                         continue;
 599
 600                 pname = lp_printername(snum);
 601                 if (!pcap_printername_ok(pname)) {
 602                         DEBUG(3, ("removing stale printer %s\n", pname));
 603
 604                         if (is_printer_published(NULL, snum, NULL))
 605                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 606                         del_a_printer(pname);
 607                         lp_killservice(snum);
 608                 }
 609         }
 610
 611         load_printers();
 612 }
 613
 614 /****************************************************************************
 615  Reload the services file.
 616 **************************************************************************/
 617
 618 BOOL reload_services(BOOL test)
 619 {
 620         BOOL ret;
 621
 622         if (lp_loaded()) {
 623                 pstring fname;
 624                 pstrcpy(fname,lp_configfile());
 625                 if (file_exist(fname, NULL) &&
 626                     !strcsequal(fname, dyn_CONFIGFILE)) {
 627                         pstrcpy(dyn_CONFIGFILE, fname);
 628                         test = False;
 629                 }
 630         }
 631
 632         reopen_logs();
 633
 634         if (test && !lp_file_list_changed())
 635                 return(True);
 636
 637         lp_killunused(conn_snum_used);
 638
 639         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
 640
 641         reload_printers();
 642
 643         /* perhaps the config filename is now set */
 644         if (!test)
 645                 reload_services(True);
 646
 647         reopen_logs();
 648
 649         load_interfaces();
 650
 651         if (smbd_server_fd() != -1) {
 652                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 653                 set_socket_options(smbd_server_fd(), user_socket_options);
 654         }
 655
 656         mangle_reset_cache();
 657         reset_stat_cache();
 658
 659         /* this forces service parameters to be flushed */
 660         set_current_service(NULL,0,True);
 661
 662         return(ret);
 663 }
 664
 665 /****************************************************************************
 666  Exit the server.
 667 ****************************************************************************/
 668
 669 /* Reasons for shutting down a server process. */
 670 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 671
 672 static void exit_server_common(enum server_exit_reason how,
 673         const char *const reason) NORETURN_ATTRIBUTE;
 674
 675 static void exit_server_common(enum server_exit_reason how,
 676         const char *const reason)
 677 {
 678         static int firsttime=1;
 679
 680         if (!firsttime)
 681                 exit(0);
 682         firsttime = 0;
 683
 684         change_to_root_user();
 685
 686         if (negprot_global_auth_context) {
 687                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 688         }
 689
 690         conn_close_all();
 691
 692         invalidate_all_vuids();
 693
 694         print_notify_send_messages(3); /* 3 second timeout. */
 695
 696         /* delete our entry in the connections database. */
 697         yield_connection(NULL,"");
 698
 699         respond_to_all_remaining_local_messages();
 700
 701 #ifdef WITH_DFS
 702         if (dcelogin_atmost_once) {
 703                 dfs_unlogin();
 704         }
 705 #endif
 706
 707         locking_end();
 708         printing_end();
 709
 710         if (how != SERVER_EXIT_NORMAL) {
 711                 int oldlevel = DEBUGLEVEL;
 712                 char *last_inbuf = get_InBuffer();
 713
 714                 DEBUGLEVEL = 10;
 715
 716                 DEBUGSEP(0);
 717                 DEBUG(0,("Abnormal server exit: %s\n",
 718                         reason ? reason : "no explanation provided"));
 719                 DEBUGSEP(0);
 720
 721                 log_stack_trace();
 722                 if (last_inbuf) {
 723                         DEBUG(0,("Last message was %s\n", LAST_MESSAGE()));
 724                         show_msg(last_inbuf);
 725                 }
 726
 727                 DEBUGLEVEL = oldlevel;
 728                 dump_core();
 729
 730         } else {
 731                 DEBUG(3,("Server exit (%s)\n",
 732                         (reason ? reason : "normal exit")));
 733         }
 734
 735         exit(0);
 736 }
 737
 738 void exit_server(const char *const explanation)
 739 {
 740         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 741 }
 742
 743 void exit_server_cleanly(const char *const explanation)
 744 {
 745         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 746 }
 747
 748 void exit_server_fault(void)
 749 {
 750         exit_server("critical server fault");
 751 }
 752
 753 /****************************************************************************
 754  Initialise connect, service and file structs.
 755 ****************************************************************************/
 756
 757 static BOOL init_structs(void )
 758 {
 759         /*
 760          * Set the machine NETBIOS name if not already
 761          * set from the config file.
 762          */
 763
 764         if (!init_names())
 765                 return False;
 766
 767         conn_init();
 768
 769         file_init();
 770
 771         /* for RPC pipes */
 772         init_rpc_pipe_hnd();
 773
 774         init_dptrs();
 775
 776         secrets_init();
 777
 778         return True;
 779 }
 780
 781 /****************************************************************************
 782  main program.
 783 ****************************************************************************/
 784
 785 /* Declare prototype for build_options() to avoid having to run it through
 786    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
 787    prototype generation system is too complicated. */
 788
 789 void build_options(BOOL screen);
 790
 791  int main(int argc,const char *argv[])
 792 {
 793         /* shall I run as a daemon */
 794         static BOOL is_daemon = False;
 795         static BOOL interactive = False;
 796         static BOOL Fork = True;
 797         static BOOL no_process_group = False;
 798         static BOOL log_stdout = False;
 799         static char *ports = NULL;
 800         int opt;
 801         poptContext pc;
 802
 803         struct poptOption long_options[] = {
 804         POPT_AUTOHELP
 805         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon (default)" },
 806         {"interactive", 'i', POPT_ARG_VAL, &interactive, True, "Run interactive (not a daemon)"},
 807         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools, etc.)" },
 808         {"no-process-group", '\0', POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
 809         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 810         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
 811         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
 812         POPT_COMMON_SAMBA
 813         POPT_COMMON_DYNCONFIG
 814         POPT_TABLEEND
 815         };
 816
 817         load_case_tables();
 818
 819 #ifdef HAVE_SET_AUTH_PARAMETERS
 820         set_auth_parameters(argc,argv);
 821 #endif
 822
 823         pc = poptGetContext("smbd", argc, argv, long_options, 0);
 824
 825         while((opt = poptGetNextOpt(pc)) != -1) {
 826                 switch (opt)  {
 827                 case 'b':
 828                         build_options(True); /* Display output to screen as well as debug */
 829                         exit(0);
 830                         break;
 831                 }
 832         }
 833
 834         poptFreeContext(pc);
 835
 836 #ifdef HAVE_SETLUID
 837         /* needed for SecureWare on SCO */
 838         setluid(0);
 839 #endif
 840
 841         sec_init();
 842
 843         set_remote_machine_name("smbd", False);
 844
 845         if (interactive) {
 846                 Fork = False;
 847                 log_stdout = True;
 848         }
 849
 850         if (interactive && (DEBUGLEVEL >= 9)) {
 851                 talloc_enable_leak_report();
 852         }
 853
 854         if (log_stdout && Fork) {
 855                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 856                 exit(1);
 857         }
 858
 859         setup_logging(argv[0],log_stdout);
 860
 861         /* we want to re-seed early to prevent time delays causing
 862            client problems at a later date. (tridge) */
 863         generate_random_buffer(NULL, 0);
 864
 865         /* make absolutely sure we run as root - to handle cases where people
 866            are crazy enough to have it setuid */
 867
 868         gain_root_privilege();
 869         gain_root_group_privilege();
 870
 871         fault_setup((void (*)(void *))exit_server_fault);
 872         dump_core_setup("smbd");
 873
 874         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
 875         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
 876
 877         /* we are never interested in SIGPIPE */
 878         BlockSignals(True,SIGPIPE);
 879
 880 #if defined(SIGFPE)
 881         /* we are never interested in SIGFPE */
 882         BlockSignals(True,SIGFPE);
 883 #endif
 884
 885 #if defined(SIGUSR2)
 886         /* We are no longer interested in USR2 */
 887         BlockSignals(True,SIGUSR2);
 888 #endif
 889
 890         /* POSIX demands that signals are inherited. If the invoking process has
 891          * these signals masked, we will have problems, as we won't recieve them. */
 892         BlockSignals(False, SIGHUP);
 893         BlockSignals(False, SIGUSR1);
 894         BlockSignals(False, SIGTERM);
 895
 896         /* we want total control over the permissions on created files,
 897            so set our umask to 0 */
 898         umask(0);
 899
 900         init_sec_ctx();
 901
 902         reopen_logs();
 903
 904         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
 905         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
 906
 907         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
 908                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
 909
 910         /* Output the build options to the debug log */
 911         build_options(False);
 912
 913         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
 914                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
 915                 exit(1);
 916         }
 917
 918         /*
 919          * Do this before reload_services.
 920          */
 921
 922         if (!reload_services(False))
 923                 return(-1);
 924
 925         init_structs();
 926
 927 #ifdef WITH_PROFILE
 928         if (!profile_setup(False)) {
 929                 DEBUG(0,("ERROR: failed to setup profiling\n"));
 930                 return -1;
 931         }
 932 #endif
 933
 934         DEBUG(3,( "loaded services\n"));
 935
 936         if (!is_daemon && !is_a_socket(0)) {
 937                 if (!interactive)
 938                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 939
 940                 /*
 941                  * Setting is_daemon here prevents us from eventually calling
 942                  * the open_sockets_inetd()
 943                  */
 944
 945                 is_daemon = True;
 946         }
 947
 948         if (is_daemon && !interactive) {
 949                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
 950                 become_daemon(Fork, no_process_group);
 951         }
 952
 953 #if HAVE_SETPGID
 954         /*
 955          * If we're interactive we want to set our own process group for
 956          * signal management.
 957          */
 958         if (interactive && !no_process_group)
 959                 setpgid( (pid_t)0, (pid_t)0);
 960 #endif
 961
 962         if (!directory_exist(lp_lockdir(), NULL))
 963                 mkdir(lp_lockdir(), 0755);
 964
 965         if (is_daemon)
 966                 pidfile_create("smbd");
 967
 968         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
 969         if (!message_init())
 970                 exit(1);
 971
 972         /* Initialise the password backed before the global_sam_sid
 973            to ensure that we fetch from ldap before we make a domain sid up */
 974
 975         if(!initialize_password_db(False))
 976                 exit(1);
 977
 978         if (!secrets_init()) {
 979                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
 980                 exit(1);
 981         }
 982
 983         if(!get_global_sam_sid()) {
 984                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
 985                 exit(1);
 986         }
 987
 988         if (!session_init())
 989                 exit(1);
 990
 991         if (conn_tdb_ctx() == NULL)
 992                 exit(1);
 993
 994         if (!locking_init(0))
 995                 exit(1);
 996
 997         namecache_enable();
 998
 999         if (!init_registry())
1000                 exit(1);
1001
1002 #if 0
1003         if (!init_svcctl_db())
1004                 exit(1);
1005 #endif
1006
1007         if (!print_backend_init())
1008                 exit(1);
1009
1010         if (!init_guest_info()) {
1011                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1012                 return -1;
1013         }
1014
1015         /* Setup the main smbd so that we can get messages. */
1016         /* don't worry about general printing messages here */
1017
1018         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
1019
1020         /* only start the background queue daemon if we are
1021            running as a daemon -- bad things will happen if
1022            smbd is launched via inetd and we fork a copy of
1023            ourselves here */
1024
1025         if ( is_daemon && !interactive )
1026                 start_background_queue();
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(is_daemon, interactive, ports))
1035                 exit(1);
1036
1037         /*
1038          * everything after this point is run after the fork()
1039          */
1040
1041         static_init_rpc;
1042
1043         init_modules();
1044
1045         /* possibly reload the services file. */
1046         reload_services(True);
1047
1048         if (!init_account_policy()) {
1049                 DEBUG(0,("Could not open account policy tdb.\n"));
1050                 exit(1);
1051         }
1052
1053         if (*lp_rootdir()) {
1054                 if (sys_chroot(lp_rootdir()) == 0)
1055                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1056         }
1057
1058         /* Setup oplocks */
1059         if (!init_oplocks())
1060                 exit(1);
1061
1062         /* Setup change notify */
1063         if (!init_change_notify())
1064                 exit(1);
1065
1066         /* Setup aio signal handler. */
1067         initialize_async_io_handler();
1068
1069         /* re-initialise the timezone */
1070         TimeInit();
1071
1072         /* register our message handlers */
1073         message_register(MSG_SMB_FORCE_TDIS, msg_force_tdis);
1074
1075         smbd_process();
1076
1077         namecache_shutdown();
1078
1079         exit_server_cleanly(NULL);
1080         return(0);
1081 }