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) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/globals.h"
  26
  27 static_decl_rpc;
  28
  29 #ifdef WITH_DFS
  30 extern int dcelogin_atmost_once;
  31 #endif /* WITH_DFS */
  32
  33 int smbd_server_fd(void)
  34 {
  35         return server_fd;
  36 }
  37
  38 static void smbd_set_server_fd(int fd)
  39 {
  40         server_fd = fd;
  41 }
  42
  43 int get_client_fd(void)
  44 {
  45         return server_fd;
  46 }
  47
  48 #ifdef CLUSTER_SUPPORT
  49 static int client_get_tcp_info(struct sockaddr_storage *server,
  50                                struct sockaddr_storage *client)
  51 {
  52         socklen_t length;
  53         if (server_fd == -1) {
  54                 return -1;
  55         }
  56         length = sizeof(*server);
  57         if (getsockname(server_fd, (struct sockaddr *)server, &length) != 0) {
  58                 return -1;
  59         }
  60         length = sizeof(*client);
  61         if (getpeername(server_fd, (struct sockaddr *)client, &length) != 0) {
  62                 return -1;
  63         }
  64         return 0;
  65 }
  66 #endif
  67
  68 struct event_context *smbd_event_context(void)
  69 {
  70         if (!smbd_event_ctx) {
  71                 smbd_event_ctx = event_context_init(talloc_autofree_context());
  72         }
  73         if (!smbd_event_ctx) {
  74                 smb_panic("Could not init smbd event context");
  75         }
  76         return smbd_event_ctx;
  77 }
  78
  79 struct messaging_context *smbd_messaging_context(void)
  80 {
  81         if (smbd_msg_ctx == NULL) {
  82                 smbd_msg_ctx = messaging_init(talloc_autofree_context(),
  83                                               server_id_self(),
  84                                               smbd_event_context());
  85         }
  86         if (smbd_msg_ctx == NULL) {
  87                 DEBUG(0, ("Could not init smbd messaging context.\n"));
  88         }
  89         return smbd_msg_ctx;
  90 }
  91
  92 struct memcache *smbd_memcache(void)
  93 {
  94         if (!smbd_memcache_ctx) {
  95                 smbd_memcache_ctx = memcache_init(talloc_autofree_context(),
  96                                                   lp_max_stat_cache_size()*1024);
  97         }
  98         if (!smbd_memcache_ctx) {
  99                 smb_panic("Could not init smbd memcache");
 100         }
 101
 102         return smbd_memcache_ctx;
 103 }
 104
 105 /*******************************************************************
 106  What to do when smb.conf is updated.
 107  ********************************************************************/
 108
 109 static void smb_conf_updated(struct messaging_context *msg,
 110                              void *private_data,
 111                              uint32_t msg_type,
 112                              struct server_id server_id,
 113                              DATA_BLOB *data)
 114 {
 115         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
 116                   "updated. Reloading.\n"));
 117         reload_services(False);
 118 }
 119
 120
 121 /*******************************************************************
 122  Delete a statcache entry.
 123  ********************************************************************/
 124
 125 static void smb_stat_cache_delete(struct messaging_context *msg,
 126                                   void *private_data,
 127                                   uint32_t msg_tnype,
 128                                   struct server_id server_id,
 129                                   DATA_BLOB *data)
 130 {
 131         const char *name = (const char *)data->data;
 132         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 133         stat_cache_delete(name);
 134 }
 135
 136 /****************************************************************************
 137  Terminate signal.
 138 ****************************************************************************/
 139
 140 static void sig_term(void)
 141 {
 142         got_sig_term = 1;
 143         sys_select_signal(SIGTERM);
 144 }
 145
 146 /****************************************************************************
 147  Catch a sighup.
 148 ****************************************************************************/
 149
 150 static void sig_hup(int sig)
 151 {
 152         reload_after_sighup = 1;
 153         sys_select_signal(SIGHUP);
 154 }
 155
 156 /****************************************************************************
 157  Catch a sigcld
 158 ****************************************************************************/
 159 static void sig_cld(int sig)
 160 {
 161         got_sig_cld = 1;
 162         sys_select_signal(SIGCLD);
 163 }
 164
 165 /****************************************************************************
 166   Send a SIGTERM to our process group.
 167 *****************************************************************************/
 168
 169 static void  killkids(void)
 170 {
 171         if(am_parent) kill(0,SIGTERM);
 172 }
 173
 174 /****************************************************************************
 175  Process a sam sync message - not sure whether to do this here or
 176  somewhere else.
 177 ****************************************************************************/
 178
 179 static void msg_sam_sync(struct messaging_context *msg,
 180                          void *private_data,
 181                          uint32_t msg_type,
 182                          struct server_id server_id,
 183                          DATA_BLOB *data)
 184 {
 185         DEBUG(10, ("** sam sync message received, ignoring\n"));
 186 }
 187
 188
 189 /****************************************************************************
 190  Open the socket communication - inetd.
 191 ****************************************************************************/
 192
 193 static bool open_sockets_inetd(void)
 194 {
 195         /* Started from inetd. fd 0 is the socket. */
 196         /* We will abort gracefully when the client or remote system
 197            goes away */
 198         smbd_set_server_fd(dup(0));
 199
 200         /* close our standard file descriptors */
 201         close_low_fds(False); /* Don't close stderr */
 202
 203         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 204         set_socket_options(smbd_server_fd(), lp_socket_options());
 205
 206         return True;
 207 }
 208
 209 static void msg_exit_server(struct messaging_context *msg,
 210                             void *private_data,
 211                             uint32_t msg_type,
 212                             struct server_id server_id,
 213                             DATA_BLOB *data)
 214 {
 215         DEBUG(3, ("got a SHUTDOWN message\n"));
 216         exit_server_cleanly(NULL);
 217 }
 218
 219 #ifdef DEVELOPER
 220 static void msg_inject_fault(struct messaging_context *msg,
 221                              void *private_data,
 222                              uint32_t msg_type,
 223                              struct server_id src,
 224                              DATA_BLOB *data)
 225 {
 226         int sig;
 227
 228         if (data->length != sizeof(sig)) {
 229
 230                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
 231                           procid_str_static(&src)));
 232                 return;
 233         }
 234
 235         sig = *(int *)data->data;
 236         if (sig == -1) {
 237                 exit_server("internal error injected");
 238                 return;
 239         }
 240
 241 #if HAVE_STRSIGNAL
 242         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
 243                   procid_str_static(&src), sig, strsignal(sig)));
 244 #else
 245         DEBUG(0, ("Process %s requested injection of signal %d\n",
 246                   procid_str_static(&src), sig));
 247 #endif
 248
 249         kill(sys_getpid(), sig);
 250 }
 251 #endif /* DEVELOPER */
 252
 253 struct child_pid {
 254         struct child_pid *prev, *next;
 255         pid_t pid;
 256 };
 257
 258 static void add_child_pid(pid_t pid)
 259 {
 260         struct child_pid *child;
 261
 262         if (lp_max_smbd_processes() == 0) {
 263                 /* Don't bother with the child list if we don't care anyway */
 264                 return;
 265         }
 266
 267         child = SMB_MALLOC_P(struct child_pid);
 268         if (child == NULL) {
 269                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 270                 return;
 271         }
 272         child->pid = pid;
 273         DLIST_ADD(children, child);
 274         num_children += 1;
 275 }
 276
 277 static void remove_child_pid(pid_t pid, bool unclean_shutdown)
 278 {
 279         struct child_pid *child;
 280
 281         if (unclean_shutdown) {
 282                 /* a child terminated uncleanly so tickle all processes to see
 283                    if they can grab any of the pending locks
 284                 */
 285                 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n", pid));
 286                 messaging_send_buf(smbd_messaging_context(), procid_self(),
 287                                    MSG_SMB_BRL_VALIDATE, NULL, 0);
 288                 message_send_all(smbd_messaging_context(),
 289                                  MSG_SMB_UNLOCK, NULL, 0, NULL);
 290         }
 291
 292         if (lp_max_smbd_processes() == 0) {
 293                 /* Don't bother with the child list if we don't care anyway */
 294                 return;
 295         }
 296
 297         for (child = children; child != NULL; child = child->next) {
 298                 if (child->pid == pid) {
 299                         struct child_pid *tmp = child;
 300                         DLIST_REMOVE(children, child);
 301                         SAFE_FREE(tmp);
 302                         num_children -= 1;
 303                         return;
 304                 }
 305         }
 306
 307         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 308 }
 309
 310 /****************************************************************************
 311  Have we reached the process limit ?
 312 ****************************************************************************/
 313
 314 static bool allowable_number_of_smbd_processes(void)
 315 {
 316         int max_processes = lp_max_smbd_processes();
 317
 318         if (!max_processes)
 319                 return True;
 320
 321         return num_children < max_processes;
 322 }
 323
 324 /****************************************************************************
 325  Open the socket communication.
 326 ****************************************************************************/
 327
 328 static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ports)
 329 {
 330         int num_interfaces = iface_count();
 331         int num_sockets = 0;
 332         int fd_listenset[FD_SETSIZE];
 333         fd_set listen_set;
 334         int s;
 335         int maxfd = 0;
 336         int i;
 337         char *ports;
 338         struct dns_reg_state * dns_reg = NULL;
 339         unsigned dns_port = 0;
 340
 341         if (!is_daemon) {
 342                 return open_sockets_inetd();
 343         }
 344
 345 #ifdef HAVE_ATEXIT
 346         atexit(killkids);
 347 #endif
 348
 349         /* Stop zombies */
 350         CatchSignal(SIGCLD, sig_cld);
 351
 352         FD_ZERO(&listen_set);
 353
 354         /* use a reasonable default set of ports - listing on 445 and 139 */
 355         if (!smb_ports) {
 356                 ports = lp_smb_ports();
 357                 if (!ports || !*ports) {
 358                         ports = smb_xstrdup(SMB_PORTS);
 359                 } else {
 360                         ports = smb_xstrdup(ports);
 361                 }
 362         } else {
 363                 ports = smb_xstrdup(smb_ports);
 364         }
 365
 366         if (lp_interfaces() && lp_bind_interfaces_only()) {
 367                 /* We have been given an interfaces line, and been
 368                    told to only bind to those interfaces. Create a
 369                    socket per interface and bind to only these.
 370                 */
 371
 372                 /* Now open a listen socket for each of the
 373                    interfaces. */
 374                 for(i = 0; i < num_interfaces; i++) {
 375                         TALLOC_CTX *frame = NULL;
 376                         const struct sockaddr_storage *ifss =
 377                                         iface_n_sockaddr_storage(i);
 378                         char *tok;
 379                         const char *ptr;
 380
 381                         if (ifss == NULL) {
 382                                 DEBUG(0,("open_sockets_smbd: "
 383                                         "interface %d has NULL IP address !\n",
 384                                         i));
 385                                 continue;
 386                         }
 387
 388                         frame = talloc_stackframe();
 389                         for (ptr=ports;
 390                                         next_token_talloc(frame,&ptr, &tok, " \t,");) {
 391                                 unsigned port = atoi(tok);
 392                                 if (port == 0 || port > 0xffff) {
 393                                         continue;
 394                                 }
 395
 396                                 /* Keep the first port for mDNS service
 397                                  * registration.
 398                                  */
 399                                 if (dns_port == 0) {
 400                                         dns_port = port;
 401                                 }
 402
 403                                 s = fd_listenset[num_sockets] =
 404                                         open_socket_in(SOCK_STREAM,
 405                                                         port,
 406                                                         num_sockets == 0 ? 0 : 2,
 407                                                         ifss,
 408                                                         true);
 409                                 if(s == -1) {
 410                                         continue;
 411                                 }
 412
 413                                 /* ready to listen */
 414                                 set_socket_options(s,"SO_KEEPALIVE");
 415                                 set_socket_options(s,lp_socket_options());
 416
 417                                 /* Set server socket to
 418                                  * non-blocking for the accept. */
 419                                 set_blocking(s,False);
 420
 421                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 422                                         DEBUG(0,("open_sockets_smbd: listen: "
 423                                                 "%s\n", strerror(errno)));
 424                                         close(s);
 425                                         TALLOC_FREE(frame);
 426                                         return False;
 427                                 }
 428                                 FD_SET(s,&listen_set);
 429                                 maxfd = MAX( maxfd, s);
 430
 431                                 num_sockets++;
 432                                 if (num_sockets >= FD_SETSIZE) {
 433                                         DEBUG(0,("open_sockets_smbd: Too "
 434                                                 "many sockets to bind to\n"));
 435                                         TALLOC_FREE(frame);
 436                                         return False;
 437                                 }
 438                         }
 439                         TALLOC_FREE(frame);
 440                 }
 441         } else {
 442                 /* Just bind to 0.0.0.0 - accept connections
 443                    from anywhere. */
 444
 445                 TALLOC_CTX *frame = talloc_stackframe();
 446                 char *tok;
 447                 const char *ptr;
 448                 const char *sock_addr = lp_socket_address();
 449                 char *sock_tok;
 450                 const char *sock_ptr;
 451
 452                 if (strequal(sock_addr, "0.0.0.0") ||
 453                     strequal(sock_addr, "::")) {
 454 #if HAVE_IPV6
 455                         sock_addr = "::,0.0.0.0";
 456 #else
 457                         sock_addr = "0.0.0.0";
 458 #endif
 459                 }
 460
 461                 for (sock_ptr=sock_addr;
 462                                 next_token_talloc(frame, &sock_ptr, &sock_tok, " \t,"); ) {
 463                         for (ptr=ports; next_token_talloc(frame, &ptr, &tok, " \t,"); ) {
 464                                 struct sockaddr_storage ss;
 465
 466                                 unsigned port = atoi(tok);
 467                                 if (port == 0 || port > 0xffff) {
 468                                         continue;
 469                                 }
 470
 471                                 /* Keep the first port for mDNS service
 472                                  * registration.
 473                                  */
 474                                 if (dns_port == 0) {
 475                                         dns_port = port;
 476                                 }
 477
 478                                 /* open an incoming socket */
 479                                 if (!interpret_string_addr(&ss, sock_tok,
 480                                                 AI_NUMERICHOST|AI_PASSIVE)) {
 481                                         continue;
 482                                 }
 483
 484                                 s = open_socket_in(SOCK_STREAM,
 485                                                 port,
 486                                                 num_sockets == 0 ? 0 : 2,
 487                                                 &ss,
 488                                                 true);
 489                                 if (s == -1) {
 490                                         continue;
 491                                 }
 492
 493                                 /* ready to listen */
 494                                 set_socket_options(s,"SO_KEEPALIVE");
 495                                 set_socket_options(s,lp_socket_options());
 496
 497                                 /* Set server socket to non-blocking
 498                                  * for the accept. */
 499                                 set_blocking(s,False);
 500
 501                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 502                                         DEBUG(0,("open_sockets_smbd: "
 503                                                 "listen: %s\n",
 504                                                  strerror(errno)));
 505                                         close(s);
 506                                         TALLOC_FREE(frame);
 507                                         return False;
 508                                 }
 509
 510                                 fd_listenset[num_sockets] = s;
 511                                 FD_SET(s,&listen_set);
 512                                 maxfd = MAX( maxfd, s);
 513
 514                                 num_sockets++;
 515
 516                                 if (num_sockets >= FD_SETSIZE) {
 517                                         DEBUG(0,("open_sockets_smbd: Too "
 518                                                 "many sockets to bind to\n"));
 519                                         TALLOC_FREE(frame);
 520                                         return False;
 521                                 }
 522                         }
 523                 }
 524                 TALLOC_FREE(frame);
 525         }
 526
 527         SAFE_FREE(ports);
 528
 529         if (num_sockets == 0) {
 530                 DEBUG(0,("open_sockets_smbd: No "
 531                         "sockets available to bind to.\n"));
 532                 return false;
 533         }
 534
 535         /* Setup the main smbd so that we can get messages. Note that
 536            do this after starting listening. This is needed as when in
 537            clustered mode, ctdb won't allow us to start doing database
 538            operations until it has gone thru a full startup, which
 539            includes checking to see that smbd is listening. */
 540         claim_connection(NULL,"",
 541                          FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_DBWRAP);
 542
 543         /* Listen to messages */
 544
 545         messaging_register(smbd_messaging_context(), NULL,
 546                            MSG_SMB_SAM_SYNC, msg_sam_sync);
 547         messaging_register(smbd_messaging_context(), NULL,
 548                            MSG_SHUTDOWN, msg_exit_server);
 549         messaging_register(smbd_messaging_context(), NULL,
 550                            MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 551         messaging_register(smbd_messaging_context(), NULL,
 552                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 553         messaging_register(smbd_messaging_context(), NULL,
 554                            MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
 555         brl_register_msgs(smbd_messaging_context());
 556
 557 #ifdef CLUSTER_SUPPORT
 558         if (lp_clustering()) {
 559                 ctdbd_register_reconfigure(messaging_ctdbd_connection());
 560         }
 561 #endif
 562
 563 #ifdef DEVELOPER
 564         messaging_register(smbd_messaging_context(), NULL,
 565                            MSG_SMB_INJECT_FAULT, msg_inject_fault);
 566 #endif
 567
 568         /* now accept incoming connections - forking a new process
 569            for each incoming connection */
 570         DEBUG(2,("waiting for a connection\n"));
 571         while (1) {
 572                 struct timeval now, idle_timeout;
 573                 fd_set r_fds, w_fds;
 574                 int num;
 575
 576                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 577                 message_dispatch(smbd_messaging_context());
 578
 579                 if (got_sig_cld) {
 580                         pid_t pid;
 581                         int status;
 582
 583                         got_sig_cld = False;
 584
 585                         while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
 586                                 bool unclean_shutdown = False;
 587
 588                                 /* If the child terminated normally, assume
 589                                    it was an unclean shutdown unless the
 590                                    status is 0
 591                                 */
 592                                 if (WIFEXITED(status)) {
 593                                         unclean_shutdown = WEXITSTATUS(status);
 594                                 }
 595                                 /* If the child terminated due to a signal
 596                                    we always assume it was unclean.
 597                                 */
 598                                 if (WIFSIGNALED(status)) {
 599                                         unclean_shutdown = True;
 600                                 }
 601                                 remove_child_pid(pid, unclean_shutdown);
 602                         }
 603                 }
 604
 605                 if (run_events(smbd_event_context(), 0, NULL, NULL)) {
 606                         continue;
 607                 }
 608
 609                 idle_timeout = timeval_zero();
 610
 611                 memcpy((char *)&r_fds, (char *)&listen_set,
 612                        sizeof(listen_set));
 613                 FD_ZERO(&w_fds);
 614                 GetTimeOfDay(&now);
 615
 616                 /* Kick off our mDNS registration. */
 617                 if (dns_port != 0) {
 618                         dns_register_smbd(&dns_reg, dns_port, &maxfd,
 619                                         &r_fds, &idle_timeout);
 620                 }
 621
 622                 event_add_to_select_args(smbd_event_context(), &now,
 623                                          &r_fds, &w_fds, &idle_timeout,
 624                                          &maxfd);
 625
 626                 num = sys_select(maxfd+1,&r_fds,&w_fds,NULL,
 627                                  timeval_is_zero(&idle_timeout) ?
 628                                  NULL : &idle_timeout);
 629
 630                 if (run_events(smbd_event_context(), num, &r_fds, &w_fds)) {
 631                         continue;
 632                 }
 633
 634                 if (num == -1 && errno == EINTR) {
 635                         if (got_sig_term) {
 636                                 exit_server_cleanly(NULL);
 637                         }
 638
 639                         /* check for sighup processing */
 640                         if (reload_after_sighup) {
 641                                 change_to_root_user();
 642                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 643                                 reload_services(False);
 644                                 reload_after_sighup = 0;
 645                         }
 646
 647                         continue;
 648                 }
 649
 650
 651                 /* If the idle timeout fired and we don't have any connected
 652                  * users, exit gracefully. We should be running under a process
 653                  * controller that will restart us if necessry.
 654                  */
 655                 if (num == 0 && count_all_current_connections() == 0) {
 656                         exit_server_cleanly("idle timeout");
 657                 }
 658
 659                 /* process pending nDNS responses */
 660                 if (dns_register_smbd_reply(dns_reg, &r_fds, &idle_timeout)) {
 661                         --num;
 662                 }
 663
 664                 /* check if we need to reload services */
 665                 check_reload(time(NULL));
 666
 667                 /* Find the sockets that are read-ready -
 668                    accept on these. */
 669                 for( ; num > 0; num--) {
 670                         struct sockaddr addr;
 671                         socklen_t in_addrlen = sizeof(addr);
 672                         pid_t child = 0;
 673
 674                         s = -1;
 675                         for(i = 0; i < num_sockets; i++) {
 676                                 if(FD_ISSET(fd_listenset[i],&r_fds)) {
 677                                         s = fd_listenset[i];
 678                                         /* Clear this so we don't look
 679                                            at it again. */
 680                                         FD_CLR(fd_listenset[i],&r_fds);
 681                                         break;
 682                                 }
 683                         }
 684
 685                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 686
 687                         if (smbd_server_fd() == -1 && errno == EINTR)
 688                                 continue;
 689
 690                         if (smbd_server_fd() == -1) {
 691                                 DEBUG(2,("open_sockets_smbd: accept: %s\n",
 692                                          strerror(errno)));
 693                                 continue;
 694                         }
 695
 696                         /* Ensure child is set to blocking mode */
 697                         set_blocking(smbd_server_fd(),True);
 698
 699                         if (smbd_server_fd() != -1 && interactive)
 700                                 return True;
 701
 702                         if (allowable_number_of_smbd_processes() &&
 703                             smbd_server_fd() != -1 &&
 704                             ((child = sys_fork())==0)) {
 705                                 char remaddr[INET6_ADDRSTRLEN];
 706
 707                                 /* Child code ... */
 708
 709                                 /* Stop zombies, the parent explicitly handles
 710                                  * them, counting worker smbds. */
 711                                 CatchChild();
 712
 713                                 /* close the listening socket(s) */
 714                                 for(i = 0; i < num_sockets; i++)
 715                                         close(fd_listenset[i]);
 716
 717                                 /* close our mDNS daemon handle */
 718                                 dns_register_close(&dns_reg);
 719
 720                                 /* close our standard file
 721                                    descriptors */
 722                                 close_low_fds(False);
 723                                 am_parent = 0;
 724
 725                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 726                                 set_socket_options(smbd_server_fd(),
 727                                                    lp_socket_options());
 728
 729                                 /* this is needed so that we get decent entries
 730                                    in smbstatus for port 445 connects */
 731                                 set_remote_machine_name(get_peer_addr(smbd_server_fd(),
 732                                                                 remaddr,
 733                                                                 sizeof(remaddr)),
 734                                                                 false);
 735
 736                                 if (!reinit_after_fork(
 737                                             smbd_messaging_context(),
 738                                             smbd_event_context(),
 739                                             true)) {
 740                                         DEBUG(0,("reinit_after_fork() failed\n"));
 741                                         smb_panic("reinit_after_fork() failed");
 742                                 }
 743
 744                                 return True;
 745                         }
 746                         /* The parent doesn't need this socket */
 747                         close(smbd_server_fd());
 748
 749                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 750                                 Clear the closed fd info out of server_fd --
 751                                 and more importantly, out of client_fd in
 752                                 util_sock.c, to avoid a possible
 753                                 getpeername failure if we reopen the logs
 754                                 and use %I in the filename.
 755                         */
 756
 757                         smbd_set_server_fd(-1);
 758
 759                         if (child != 0) {
 760                                 add_child_pid(child);
 761                         }
 762
 763                         /* Force parent to check log size after
 764                          * spawning child.  Fix from
 765                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 766                          * parent smbd will log to logserver.smb.  It
 767                          * writes only two messages for each child
 768                          * started/finished. But each child writes,
 769                          * say, 50 messages also in logserver.smb,
 770                          * begining with the debug_count of the
 771                          * parent, before the child opens its own log
 772                          * file logserver.client. In a worst case
 773                          * scenario the size of logserver.smb would be
 774                          * checked after about 50*50=2500 messages
 775                          * (ca. 100kb).
 776                          * */
 777                         force_check_log_size();
 778
 779                 } /* end for num */
 780         } /* end while 1 */
 781
 782 /* NOTREACHED   return True; */
 783 }
 784
 785 /****************************************************************************
 786  Reload printers
 787 **************************************************************************/
 788 void reload_printers(void)
 789 {
 790         int snum;
 791         int n_services = lp_numservices();
 792         int pnum = lp_servicenumber(PRINTERS_NAME);
 793         const char *pname;
 794
 795         pcap_cache_reload();
 796
 797         /* remove stale printers */
 798         for (snum = 0; snum < n_services; snum++) {
 799                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 800                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 801                                       lp_autoloaded(snum)))
 802                         continue;
 803
 804                 pname = lp_printername(snum);
 805                 if (!pcap_printername_ok(pname)) {
 806                         DEBUG(3, ("removing stale printer %s\n", pname));
 807
 808                         if (is_printer_published(NULL, snum, NULL))
 809                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 810                         del_a_printer(pname);
 811                         lp_killservice(snum);
 812                 }
 813         }
 814
 815         load_printers();
 816 }
 817
 818 /****************************************************************************
 819  Reload the services file.
 820 **************************************************************************/
 821
 822 bool reload_services(bool test)
 823 {
 824         bool ret;
 825
 826         if (lp_loaded()) {
 827                 char *fname = lp_configfile();
 828                 if (file_exist(fname) &&
 829                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 830                         set_dyn_CONFIGFILE(fname);
 831                         test = False;
 832                 }
 833         }
 834
 835         reopen_logs();
 836
 837         if (test && !lp_file_list_changed())
 838                 return(True);
 839
 840         lp_killunused(conn_snum_used);
 841
 842         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 843
 844         reload_printers();
 845
 846         /* perhaps the config filename is now set */
 847         if (!test)
 848                 reload_services(True);
 849
 850         reopen_logs();
 851
 852         load_interfaces();
 853
 854         if (smbd_server_fd() != -1) {
 855                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 856                 set_socket_options(smbd_server_fd(), lp_socket_options());
 857         }
 858
 859         mangle_reset_cache();
 860         reset_stat_cache();
 861
 862         /* this forces service parameters to be flushed */
 863         set_current_service(NULL,0,True);
 864
 865         return(ret);
 866 }
 867
 868 /****************************************************************************
 869  Exit the server.
 870 ****************************************************************************/
 871
 872 /* Reasons for shutting down a server process. */
 873 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 874
 875 static void exit_server_common(enum server_exit_reason how,
 876         const char *const reason) _NORETURN_;
 877
 878 static void exit_server_common(enum server_exit_reason how,
 879         const char *const reason)
 880 {
 881         bool had_open_conn;
 882
 883         if (!exit_firsttime)
 884                 exit(0);
 885         exit_firsttime = false;
 886
 887         change_to_root_user();
 888
 889         if (negprot_global_auth_context) {
 890                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 891         }
 892
 893         had_open_conn = conn_close_all();
 894
 895         invalidate_all_vuids();
 896
 897         /* 3 second timeout. */
 898         print_notify_send_messages(smbd_messaging_context(), 3);
 899
 900         /* delete our entry in the connections database. */
 901         yield_connection(NULL,"");
 902
 903         respond_to_all_remaining_local_messages();
 904
 905 #ifdef WITH_DFS
 906         if (dcelogin_atmost_once) {
 907                 dfs_unlogin();
 908         }
 909 #endif
 910
 911 #ifdef USE_DMAPI
 912         /* Destroy Samba DMAPI session only if we are master smbd process */
 913         if (am_parent) {
 914                 if (!dmapi_destroy_session()) {
 915                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 916                 }
 917         }
 918 #endif
 919
 920         locking_end();
 921         printing_end();
 922
 923         if (how != SERVER_EXIT_NORMAL) {
 924                 int oldlevel = DEBUGLEVEL;
 925
 926                 DEBUGLEVEL = 10;
 927
 928                 DEBUGSEP(0);
 929                 DEBUG(0,("Abnormal server exit: %s\n",
 930                         reason ? reason : "no explanation provided"));
 931                 DEBUGSEP(0);
 932
 933                 log_stack_trace();
 934
 935                 DEBUGLEVEL = oldlevel;
 936                 dump_core();
 937
 938         } else {
 939                 DEBUG(3,("Server exit (%s)\n",
 940                         (reason ? reason : "normal exit")));
 941         }
 942
 943         /* if we had any open SMB connections when we exited then we
 944            need to tell the parent smbd so that it can trigger a retry
 945            of any locks we may have been holding or open files we were
 946            blocking */
 947         if (had_open_conn) {
 948                 exit(1);
 949         } else {
 950                 exit(0);
 951         }
 952 }
 953
 954 void exit_server(const char *const explanation)
 955 {
 956         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 957 }
 958
 959 void exit_server_cleanly(const char *const explanation)
 960 {
 961         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 962 }
 963
 964 void exit_server_fault(void)
 965 {
 966         exit_server("critical server fault");
 967 }
 968
 969
 970 /****************************************************************************
 971 received when we should release a specific IP
 972 ****************************************************************************/
 973 static void release_ip(const char *ip, void *priv)
 974 {
 975         char addr[INET6_ADDRSTRLEN];
 976
 977         if (strcmp(client_socket_addr(get_client_fd(),addr,sizeof(addr)), ip) == 0) {
 978                 /* we can't afford to do a clean exit - that involves
 979                    database writes, which would potentially mean we
 980                    are still running after the failover has finished -
 981                    we have to get rid of this process ID straight
 982                    away */
 983                 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
 984                         ip));
 985                 /* note we must exit with non-zero status so the unclean handler gets
 986                    called in the parent, so that the brl database is tickled */
 987                 _exit(1);
 988         }
 989 }
 990
 991 static void msg_release_ip(struct messaging_context *msg_ctx, void *private_data,
 992                            uint32_t msg_type, struct server_id server_id, DATA_BLOB *data)
 993 {
 994         release_ip((char *)data->data, NULL);
 995 }
 996
 997 /****************************************************************************
 998  Initialise connect, service and file structs.
 999 ****************************************************************************/
1000
1001 static bool init_structs(void )
1002 {
1003         /*
1004          * Set the machine NETBIOS name if not already
1005          * set from the config file.
1006          */
1007
1008         if (!init_names())
1009                 return False;
1010
1011         conn_init();
1012
1013         file_init();
1014
1015         init_dptrs();
1016
1017         if (!secrets_init())
1018                 return False;
1019
1020         return True;
1021 }
1022
1023 /*
1024  * Send keepalive packets to our client
1025  */
1026 static bool keepalive_fn(const struct timeval *now, void *private_data)
1027 {
1028         if (!send_keepalive(smbd_server_fd())) {
1029                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1030                 return False;
1031         }
1032         return True;
1033 }
1034
1035 /*
1036  * Do the recurring check if we're idle
1037  */
1038 static bool deadtime_fn(const struct timeval *now, void *private_data)
1039 {
1040         if ((conn_num_open() == 0)
1041             || (conn_idle_all(now->tv_sec))) {
1042                 DEBUG( 2, ( "Closing idle connection\n" ) );
1043                 messaging_send(smbd_messaging_context(), procid_self(),
1044                                MSG_SHUTDOWN, &data_blob_null);
1045                 return False;
1046         }
1047
1048         return True;
1049 }
1050
1051 /*
1052  * Do the recurring log file and smb.conf reload checks.
1053  */
1054
1055 static bool housekeeping_fn(const struct timeval *now, void *private_data)
1056 {
1057         change_to_root_user();
1058
1059         /* update printer queue caches if necessary */
1060         update_monitored_printq_cache();
1061
1062         /* check if we need to reload services */
1063         check_reload(time(NULL));
1064
1065         /* Change machine password if neccessary. */
1066         attempt_machine_password_change();
1067
1068         /*
1069          * Force a log file check.
1070          */
1071         force_check_log_size();
1072         check_log_size();
1073         return true;
1074 }
1075
1076 /****************************************************************************
1077  main program.
1078 ****************************************************************************/
1079
1080 /* Declare prototype for build_options() to avoid having to run it through
1081    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1082    prototype generation system is too complicated. */
1083
1084 extern void build_options(bool screen);
1085
1086  int main(int argc,const char *argv[])
1087 {
1088         /* shall I run as a daemon */
1089         bool is_daemon = false;
1090         bool interactive = false;
1091         bool Fork = true;
1092         bool no_process_group = false;
1093         bool log_stdout = false;
1094         char *ports = NULL;
1095         char *profile_level = NULL;
1096         int opt;
1097         poptContext pc;
1098         bool print_build_options = False;
1099         enum {
1100                 OPT_DAEMON = 1000,
1101                 OPT_INTERACTIVE,
1102                 OPT_FORK,
1103                 OPT_NO_PROCESS_GROUP,
1104                 OPT_LOG_STDOUT
1105         };
1106         struct poptOption long_options[] = {
1107         POPT_AUTOHELP
1108         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1109         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1110         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1111         {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1112         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1113         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1114         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1115         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1116         POPT_COMMON_SAMBA
1117         POPT_COMMON_DYNCONFIG
1118         POPT_TABLEEND
1119         };
1120         TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
1121
1122         smbd_init_globals();
1123
1124         TimeInit();
1125
1126 #ifdef HAVE_SET_AUTH_PARAMETERS
1127         set_auth_parameters(argc,argv);
1128 #endif
1129
1130         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1131         while((opt = poptGetNextOpt(pc)) != -1) {
1132                 switch (opt)  {
1133                 case OPT_DAEMON:
1134                         is_daemon = true;
1135                         break;
1136                 case OPT_INTERACTIVE:
1137                         interactive = true;
1138                         break;
1139                 case OPT_FORK:
1140                         Fork = false;
1141                         break;
1142                 case OPT_NO_PROCESS_GROUP:
1143                         no_process_group = true;
1144                         break;
1145                 case OPT_LOG_STDOUT:
1146                         log_stdout = true;
1147                         break;
1148                 case 'b':
1149                         print_build_options = True;
1150                         break;
1151                 default:
1152                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1153                                   poptBadOption(pc, 0), poptStrerror(opt));
1154                         poptPrintUsage(pc, stderr, 0);
1155                         exit(1);
1156                 }
1157         }
1158         poptFreeContext(pc);
1159
1160         if (interactive) {
1161                 Fork = False;
1162                 log_stdout = True;
1163         }
1164
1165         setup_logging(argv[0],log_stdout);
1166
1167         if (print_build_options) {
1168                 build_options(True); /* Display output to screen as well as debug */
1169                 exit(0);
1170         }
1171
1172         load_case_tables();
1173
1174 #ifdef HAVE_SETLUID
1175         /* needed for SecureWare on SCO */
1176         setluid(0);
1177 #endif
1178
1179         sec_init();
1180
1181         set_remote_machine_name("smbd", False);
1182
1183         if (interactive && (DEBUGLEVEL >= 9)) {
1184                 talloc_enable_leak_report();
1185         }
1186
1187         if (log_stdout && Fork) {
1188                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1189                 exit(1);
1190         }
1191
1192         /* we want to re-seed early to prevent time delays causing
1193            client problems at a later date. (tridge) */
1194         generate_random_buffer(NULL, 0);
1195
1196         /* make absolutely sure we run as root - to handle cases where people
1197            are crazy enough to have it setuid */
1198
1199         gain_root_privilege();
1200         gain_root_group_privilege();
1201
1202         fault_setup((void (*)(void *))exit_server_fault);
1203         dump_core_setup("smbd");
1204
1205         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
1206         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
1207
1208         /* we are never interested in SIGPIPE */
1209         BlockSignals(True,SIGPIPE);
1210
1211 #if defined(SIGFPE)
1212         /* we are never interested in SIGFPE */
1213         BlockSignals(True,SIGFPE);
1214 #endif
1215
1216 #if defined(SIGUSR2)
1217         /* We are no longer interested in USR2 */
1218         BlockSignals(True,SIGUSR2);
1219 #endif
1220
1221         /* POSIX demands that signals are inherited. If the invoking process has
1222          * these signals masked, we will have problems, as we won't recieve them. */
1223         BlockSignals(False, SIGHUP);
1224         BlockSignals(False, SIGUSR1);
1225         BlockSignals(False, SIGTERM);
1226
1227         /* we want total control over the permissions on created files,
1228            so set our umask to 0 */
1229         umask(0);
1230
1231         init_sec_ctx();
1232
1233         reopen_logs();
1234
1235         DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1236         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1237
1238         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1239                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1240
1241         /* Output the build options to the debug log */
1242         build_options(False);
1243
1244         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1245                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1246                 exit(1);
1247         }
1248
1249         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1250                 DEBUG(0, ("error opening config file\n"));
1251                 exit(1);
1252         }
1253
1254         if (smbd_messaging_context() == NULL)
1255                 exit(1);
1256
1257         if (!reload_services(False))
1258                 return(-1);
1259
1260         init_structs();
1261
1262 #ifdef WITH_PROFILE
1263         if (!profile_setup(smbd_messaging_context(), False)) {
1264                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1265                 return -1;
1266         }
1267         if (profile_level != NULL) {
1268                 int pl = atoi(profile_level);
1269                 struct server_id src;
1270
1271                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1272                 src.pid = getpid();
1273                 set_profile_level(pl, src);
1274         }
1275 #endif
1276
1277         DEBUG(3,( "loaded services\n"));
1278
1279         if (!is_daemon && !is_a_socket(0)) {
1280                 if (!interactive)
1281                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1282
1283                 /*
1284                  * Setting is_daemon here prevents us from eventually calling
1285                  * the open_sockets_inetd()
1286                  */
1287
1288                 is_daemon = True;
1289         }
1290
1291         if (is_daemon && !interactive) {
1292                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1293                 become_daemon(Fork, no_process_group);
1294         }
1295
1296 #if HAVE_SETPGID
1297         /*
1298          * If we're interactive we want to set our own process group for
1299          * signal management.
1300          */
1301         if (interactive && !no_process_group)
1302                 setpgid( (pid_t)0, (pid_t)0);
1303 #endif
1304
1305         if (!directory_exist(lp_lockdir()))
1306                 mkdir(lp_lockdir(), 0755);
1307
1308         if (is_daemon)
1309                 pidfile_create("smbd");
1310
1311         if (!reinit_after_fork(smbd_messaging_context(),
1312                                smbd_event_context(), false)) {
1313                 DEBUG(0,("reinit_after_fork() failed\n"));
1314                 exit(1);
1315         }
1316
1317         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1318
1319         if (smbd_memcache() == NULL) {
1320                 exit(1);
1321         }
1322
1323         memcache_set_global(smbd_memcache());
1324
1325         /* Initialise the password backed before the global_sam_sid
1326            to ensure that we fetch from ldap before we make a domain sid up */
1327
1328         if(!initialize_password_db(False, smbd_event_context()))
1329                 exit(1);
1330
1331         if (!secrets_init()) {
1332                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1333                 exit(1);
1334         }
1335
1336         if(!get_global_sam_sid()) {
1337                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1338                 exit(1);
1339         }
1340
1341         if (!session_init())
1342                 exit(1);
1343
1344         if (!connections_init(True))
1345                 exit(1);
1346
1347         if (!locking_init())
1348                 exit(1);
1349
1350         namecache_enable();
1351
1352         if (!W_ERROR_IS_OK(registry_init_full()))
1353                 exit(1);
1354
1355 #if 0
1356         if (!init_svcctl_db())
1357                 exit(1);
1358 #endif
1359
1360         if (!print_backend_init(smbd_messaging_context()))
1361                 exit(1);
1362
1363         if (!init_guest_info()) {
1364                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1365                 return -1;
1366         }
1367
1368         /* only start the background queue daemon if we are
1369            running as a daemon -- bad things will happen if
1370            smbd is launched via inetd and we fork a copy of
1371            ourselves here */
1372
1373         if (is_daemon && !interactive
1374             && lp_parm_bool(-1, "smbd", "backgroundqueue", true)) {
1375                 start_background_queue();
1376         }
1377
1378         if (!open_sockets_smbd(is_daemon, interactive, ports))
1379                 exit(1);
1380
1381         /*
1382          * everything after this point is run after the fork()
1383          */
1384
1385         static_init_rpc;
1386
1387         init_modules();
1388
1389         /* Possibly reload the services file. Only worth doing in
1390          * daemon mode. In inetd mode, we know we only just loaded this.
1391          */
1392         if (is_daemon) {
1393                 reload_services(True);
1394         }
1395
1396         if (!init_account_policy()) {
1397                 DEBUG(0,("Could not open account policy tdb.\n"));
1398                 exit(1);
1399         }
1400
1401         if (*lp_rootdir()) {
1402                 if (chroot(lp_rootdir()) == 0)
1403                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1404         }
1405
1406         /* Setup oplocks */
1407         if (!init_oplocks(smbd_messaging_context()))
1408                 exit(1);
1409
1410         /* Setup aio signal handler. */
1411         initialize_async_io_handler();
1412
1413         /* register our message handlers */
1414         messaging_register(smbd_messaging_context(), NULL,
1415                            MSG_SMB_FORCE_TDIS, msg_force_tdis);
1416         messaging_register(smbd_messaging_context(), NULL,
1417                            MSG_SMB_RELEASE_IP, msg_release_ip);
1418         messaging_register(smbd_messaging_context(), NULL,
1419                            MSG_SMB_CLOSE_FILE, msg_close_file);
1420
1421         if ((lp_keepalive() != 0)
1422             && !(event_add_idle(smbd_event_context(), NULL,
1423                                 timeval_set(lp_keepalive(), 0),
1424                                 "keepalive", keepalive_fn,
1425                                 NULL))) {
1426                 DEBUG(0, ("Could not add keepalive event\n"));
1427                 exit(1);
1428         }
1429
1430         if (!(event_add_idle(smbd_event_context(), NULL,
1431                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1432                              "deadtime", deadtime_fn, NULL))) {
1433                 DEBUG(0, ("Could not add deadtime event\n"));
1434                 exit(1);
1435         }
1436
1437         if (!(event_add_idle(smbd_event_context(), NULL,
1438                              timeval_set(SMBD_SELECT_TIMEOUT, 0),
1439                              "housekeeping", housekeeping_fn, NULL))) {
1440                 DEBUG(0, ("Could not add housekeeping event\n"));
1441                 exit(1);
1442         }
1443
1444 #ifdef CLUSTER_SUPPORT
1445
1446         if (lp_clustering()) {
1447                 /*
1448                  * We need to tell ctdb about our client's TCP
1449                  * connection, so that for failover ctdbd can send
1450                  * tickle acks, triggering a reconnection by the
1451                  * client.
1452                  */
1453
1454                 struct sockaddr_storage srv, clnt;
1455
1456                 if (client_get_tcp_info(&srv, &clnt) == 0) {
1457
1458                         NTSTATUS status;
1459
1460                         status = ctdbd_register_ips(
1461                                 messaging_ctdbd_connection(),
1462                                 &srv, &clnt, release_ip, NULL);
1463
1464                         if (!NT_STATUS_IS_OK(status)) {
1465                                 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
1466                                           nt_errstr(status)));
1467                         }
1468                 } else
1469                 {
1470                         DEBUG(0,("Unable to get tcp info for "
1471                                  "CTDB_CONTROL_TCP_CLIENT: %s\n",
1472                                  strerror(errno)));
1473                 }
1474         }
1475
1476 #endif
1477
1478         TALLOC_FREE(frame);
1479
1480         smbd_process();
1481
1482         namecache_shutdown();
1483
1484         exit_server_cleanly(NULL);
1485         return(0);
1486 }