source/nsswitch/winbindd.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4
   5    Winbind daemon for ntdom nss module
   6
   7    Copyright (C) by Tim Potter 2000, 2001
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "winbindd.h"
  25
  26 /* List of all connected clients */
  27
  28 struct winbindd_cli_state *client_list;
  29 static int num_clients;
  30 BOOL opt_nocache;
  31
  32 /* Reload configuration */
  33
  34 static BOOL reload_services_file(BOOL test)
  35 {
  36         BOOL ret;
  37         pstring logfile;
  38
  39         if (lp_loaded()) {
  40                 pstring fname;
  41
  42                 pstrcpy(fname,lp_configfile());
  43                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
  44                         pstrcpy(dyn_CONFIGFILE,fname);
  45                         test = False;
  46                 }
  47         }
  48
  49         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  50         lp_set_logfile(logfile);
  51
  52         reopen_logs();
  53         ret = lp_load(dyn_CONFIGFILE,False,False,True);
  54
  55         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  56         lp_set_logfile(logfile);
  57
  58         reopen_logs();
  59         load_interfaces();
  60
  61         return(ret);
  62 }
  63
  64 #if DUMP_CORE
  65
  66 /**************************************************************************** **
  67  Prepare to dump a core file - carefully!
  68  **************************************************************************** */
  69
  70 static BOOL dump_core(void)
  71 {
  72         char *p;
  73         pstring dname;
  74         pstrcpy( dname, lp_logfile() );
  75         if ((p=strrchr(dname,'/')))
  76                 *p=0;
  77         pstrcat( dname, "/corefiles" );
  78         mkdir( dname, 0700 );
  79         sys_chown( dname, getuid(), getgid() );
  80         chmod( dname, 0700 );
  81         if ( chdir(dname) )
  82                 return( False );
  83         umask( ~(0700) );
  84
  85 #ifdef HAVE_GETRLIMIT
  86 #ifdef RLIMIT_CORE
  87         {
  88                 struct rlimit rlp;
  89                 getrlimit( RLIMIT_CORE, &rlp );
  90                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
  91                 setrlimit( RLIMIT_CORE, &rlp );
  92                 getrlimit( RLIMIT_CORE, &rlp );
  93                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
  94         }
  95 #endif
  96 #endif
  97
  98         DEBUG(0,("Dumping core in %s\n",dname));
  99         abort();
 100         return( True );
 101 } /* dump_core */
 102 #endif
 103
 104 /**************************************************************************** **
 105  Handle a fault..
 106  **************************************************************************** */
 107
 108 static void fault_quit(void)
 109 {
 110 #if DUMP_CORE
 111         dump_core();
 112 #endif
 113 }
 114
 115 static void winbindd_status(void)
 116 {
 117         struct winbindd_cli_state *tmp;
 118
 119         DEBUG(0, ("winbindd status:\n"));
 120
 121         /* Print client state information */
 122
 123         DEBUG(0, ("\t%d clients currently active\n", num_clients));
 124
 125         if (DEBUGLEVEL >= 2 && num_clients) {
 126                 DEBUG(2, ("\tclient list:\n"));
 127                 for(tmp = client_list; tmp; tmp = tmp->next) {
 128                         DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
 129                                   tmp->pid, tmp->sock, tmp->read_buf_len,
 130                                   tmp->write_buf_len));
 131                 }
 132         }
 133 }
 134
 135 /* Print winbindd status to log file */
 136
 137 static void print_winbindd_status(void)
 138 {
 139         winbindd_status();
 140         winbindd_idmap_status();
 141         winbindd_cm_status();
 142 }
 143
 144 /* Flush client cache */
 145
 146 static void flush_caches(void)
 147 {
 148         /* Clear cached user and group enumation info */
 149         wcache_flush_cache();
 150 }
 151
 152 /* Handle the signal by unlinking socket and exiting */
 153
 154 static void terminate(void)
 155 {
 156         pstring path;
 157
 158         /* Remove socket file */
 159         snprintf(path, sizeof(path), "%s/%s",
 160                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 161         unlink(path);
 162         exit(0);
 163 }
 164
 165 static BOOL do_sigterm;
 166
 167 static void termination_handler(int signum)
 168 {
 169         do_sigterm = True;
 170 }
 171
 172 static BOOL do_sigusr2;
 173
 174 static void sigusr2_handler(int signum)
 175 {
 176         do_sigusr2 = True;
 177 }
 178
 179 static BOOL do_sighup;
 180
 181 static void sighup_handler(int signum)
 182 {
 183         do_sighup = True;
 184 }
 185
 186 /* Create winbindd socket */
 187
 188 static int create_sock(void)
 189 {
 190         return create_pipe_sock( WINBINDD_SOCKET_DIR,
 191                                  WINBINDD_SOCKET_NAME, 0755);
 192 }
 193
 194 struct dispatch_table {
 195         enum winbindd_cmd cmd;
 196         enum winbindd_result (*fn)(struct winbindd_cli_state *state);
 197         char *winbindd_cmd_name;
 198 };
 199
 200 static struct dispatch_table dispatch_table[] = {
 201
 202         /* User functions */
 203
 204         { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
 205         { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
 206
 207         { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
 208         { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
 209         { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
 210
 211         { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
 212
 213         /* Group functions */
 214
 215         { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
 216         { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
 217         { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
 218         { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
 219         { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
 220
 221         /* PAM auth functions */
 222
 223         { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
 224         { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
 225         { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
 226
 227         /* Enumeration functions */
 228
 229         { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
 230         { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
 231         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
 232
 233         /* SID related functions */
 234
 235         { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
 236         { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
 237
 238         /* Lookup related functions */
 239
 240         { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
 241         { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
 242         { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
 243         { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
 244
 245         /* Miscellaneous */
 246
 247         { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
 248         { WINBINDD_PING, winbindd_ping, "PING" },
 249         { WINBINDD_INFO, winbindd_info, "INFO" },
 250         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
 251
 252         /* End of list */
 253
 254         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 255 };
 256
 257 static void process_request(struct winbindd_cli_state *state)
 258 {
 259         struct dispatch_table *table = dispatch_table;
 260
 261         /* Free response data - we may be interrupted and receive another
 262            command before being able to send this data off. */
 263
 264         SAFE_FREE(state->response.extra_data);
 265
 266         ZERO_STRUCT(state->response);
 267
 268         state->response.result = WINBINDD_ERROR;
 269         state->response.length = sizeof(struct winbindd_response);
 270
 271         /* Process command */
 272
 273         for (table = dispatch_table; table->fn; table++) {
 274                 if (state->request.cmd == table->cmd) {
 275                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 276                         state->response.result = table->fn(state);
 277                         break;
 278                 }
 279         }
 280
 281         if (!table->fn)
 282                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 283
 284         /* In case extra data pointer is NULL */
 285
 286         if (!state->response.extra_data)
 287                 state->response.length = sizeof(struct winbindd_response);
 288 }
 289
 290 /* Process a new connection by adding it to the client connection list */
 291
 292 static void new_connection(int accept_sock)
 293 {
 294         struct sockaddr_un sunaddr;
 295         struct winbindd_cli_state *state;
 296         socklen_t len;
 297         int sock;
 298
 299         /* Accept connection */
 300
 301         len = sizeof(sunaddr);
 302
 303         do {
 304                 sock = accept(accept_sock, (struct sockaddr *)&sunaddr, &len);
 305         } while (sock == -1 && errno == EINTR);
 306
 307         if (sock == -1)
 308                 return;
 309
 310         DEBUG(6,("accepted socket %d\n", sock));
 311
 312         /* Create new connection structure */
 313
 314         if ((state = (struct winbindd_cli_state *)
 315              malloc(sizeof(*state))) == NULL)
 316                 return;
 317
 318         ZERO_STRUCTP(state);
 319         state->sock = sock;
 320
 321         /* Add to connection list */
 322
 323         DLIST_ADD(client_list, state);
 324         num_clients++;
 325 }
 326
 327 /* Remove a client connection from client connection list */
 328
 329 static void remove_client(struct winbindd_cli_state *state)
 330 {
 331         /* It's a dead client - hold a funeral */
 332
 333         if (state != NULL) {
 334
 335                 /* Close socket */
 336
 337                 close(state->sock);
 338
 339                 /* Free any getent state */
 340
 341                 free_getent_state(state->getpwent_state);
 342                 free_getent_state(state->getgrent_state);
 343
 344                 /* We may have some extra data that was not freed if the
 345                    client was killed unexpectedly */
 346
 347                 SAFE_FREE(state->response.extra_data);
 348
 349                 /* Remove from list and free */
 350
 351                 DLIST_REMOVE(client_list, state);
 352                 SAFE_FREE(state);
 353                 num_clients--;
 354         }
 355 }
 356
 357 /* Process a complete received packet from a client */
 358
 359 static void process_packet(struct winbindd_cli_state *state)
 360 {
 361         /* Process request */
 362
 363         state->pid = state->request.pid;
 364
 365         process_request(state);
 366
 367         /* Update client state */
 368
 369         state->read_buf_len = 0;
 370         state->write_buf_len = sizeof(struct winbindd_response);
 371 }
 372
 373 /* Read some data from a client connection */
 374
 375 static void client_read(struct winbindd_cli_state *state)
 376 {
 377         int n;
 378
 379         /* Read data */
 380
 381         do {
 382
 383                 n = read(state->sock, state->read_buf_len +
 384                          (char *)&state->request,
 385                          sizeof(state->request) - state->read_buf_len);
 386
 387         } while (n == -1 && errno == EINTR);
 388
 389         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 390
 391         /* Read failed, kill client */
 392
 393         if (n == -1 || n == 0) {
 394                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 395                          state->sock, state->pid,
 396                          (n == -1) ? strerror(errno) : "EOF"));
 397
 398                 state->finished = True;
 399                 return;
 400         }
 401
 402         /* Update client state */
 403
 404         state->read_buf_len += n;
 405 }
 406
 407 /* Write some data to a client connection */
 408
 409 static void client_write(struct winbindd_cli_state *state)
 410 {
 411         char *data;
 412         int num_written;
 413
 414         /* Write some data */
 415
 416         if (!state->write_extra_data) {
 417
 418                 /* Write response structure */
 419
 420                 data = (char *)&state->response + sizeof(state->response) -
 421                         state->write_buf_len;
 422
 423         } else {
 424
 425                 /* Write extra data */
 426
 427                 data = (char *)state->response.extra_data +
 428                         state->response.length -
 429                         sizeof(struct winbindd_response) -
 430                         state->write_buf_len;
 431         }
 432
 433         do {
 434                 num_written = write(state->sock, data, state->write_buf_len);
 435         } while (num_written == -1 && errno == EINTR);
 436
 437         DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
 438
 439         /* Write failed, kill cilent */
 440
 441         if (num_written == -1 || num_written == 0) {
 442
 443                 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
 444                          state->sock, state->pid,
 445                          (num_written == -1) ? strerror(errno) : "EOF"));
 446
 447                 state->finished = True;
 448
 449                 SAFE_FREE(state->response.extra_data);
 450
 451                 return;
 452         }
 453
 454         /* Update client state */
 455
 456         state->write_buf_len -= num_written;
 457
 458         /* Have we written all data? */
 459
 460         if (state->write_buf_len == 0) {
 461
 462                 /* Take care of extra data */
 463
 464                 if (state->write_extra_data) {
 465
 466                         SAFE_FREE(state->response.extra_data);
 467
 468                         state->write_extra_data = False;
 469
 470                         DEBUG(10,("client_write: client_write: complete response written.\n"));
 471
 472                 } else if (state->response.length >
 473                            sizeof(struct winbindd_response)) {
 474
 475                         /* Start writing extra data */
 476
 477                         state->write_buf_len =
 478                                 state->response.length -
 479                                 sizeof(struct winbindd_response);
 480
 481                         DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
 482
 483                         state->write_extra_data = True;
 484                 }
 485         }
 486 }
 487
 488 /* Process incoming clients on accept_sock.  We use a tricky non-blocking,
 489    non-forking, non-threaded model which allows us to handle many
 490    simultaneous connections while remaining impervious to many denial of
 491    service attacks. */
 492
 493 static void process_loop(int accept_sock)
 494 {
 495         /* We'll be doing this a lot */
 496
 497         while (1) {
 498                 struct winbindd_cli_state *state;
 499                 fd_set r_fds, w_fds;
 500                 int maxfd = accept_sock, selret;
 501                 struct timeval timeout;
 502
 503                 /* Free up temporary memory */
 504
 505                 lp_talloc_free();
 506
 507                 /* Initialise fd lists for select() */
 508
 509                 FD_ZERO(&r_fds);
 510                 FD_ZERO(&w_fds);
 511                 FD_SET(accept_sock, &r_fds);
 512
 513                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 514                 timeout.tv_usec = 0;
 515
 516                 /* Set up client readers and writers */
 517
 518                 state = client_list;
 519
 520                 while (state) {
 521
 522                         /* Dispose of client connection if it is marked as
 523                            finished */
 524
 525                         if (state->finished) {
 526                                 struct winbindd_cli_state *next = state->next;
 527
 528                                 remove_client(state);
 529                                 state = next;
 530                                 continue;
 531                         }
 532
 533                         /* Select requires we know the highest fd used */
 534
 535                         if (state->sock > maxfd)
 536                                 maxfd = state->sock;
 537
 538                         /* Add fd for reading */
 539
 540                         if (state->read_buf_len != sizeof(state->request))
 541                                 FD_SET(state->sock, &r_fds);
 542
 543                         /* Add fd for writing */
 544
 545                         if (state->write_buf_len)
 546                                 FD_SET(state->sock, &w_fds);
 547
 548                         state = state->next;
 549                 }
 550
 551                 /* Call select */
 552
 553                 selret = select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 554
 555                 if (selret == 0)
 556                         continue;
 557
 558                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 559
 560                         /* Select error, something is badly wrong */
 561
 562                         perror("select");
 563                         exit(1);
 564                 }
 565
 566                 /* Create a new connection if accept_sock readable */
 567
 568                 if (selret > 0) {
 569
 570                         if (FD_ISSET(accept_sock, &r_fds))
 571                                 new_connection(accept_sock);
 572
 573                         /* Process activity on client connections */
 574
 575                         for (state = client_list; state; state = state->next) {
 576
 577                                 /* Data available for reading */
 578
 579                                 if (FD_ISSET(state->sock, &r_fds)) {
 580
 581                                         /* Read data */
 582
 583                                         client_read(state);
 584
 585                                         /*
 586                                          * If we have the start of a
 587                                          * packet, then check the
 588                                          * length field to make sure
 589                                          * the client's not talking
 590                                          * Mock Swedish.
 591                                          */
 592
 593                                         if (state->read_buf_len >= sizeof(uint32)
 594                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 595                                                 DEBUG(0,("process_loop: Invalid request size (%d) send, should be (%d)\n",
 596                                                                 *(uint32 *) &state->request, sizeof(state->request)));
 597
 598                                                 remove_client(state);
 599                                                 break;
 600                                         }
 601
 602                                         /* A request packet might be
 603                                            complete */
 604
 605                                         if (state->read_buf_len ==
 606                                             sizeof(state->request)) {
 607                                                 process_packet(state);
 608                                         }
 609                                 }
 610
 611                                 /* Data available for writing */
 612
 613                                 if (FD_ISSET(state->sock, &w_fds))
 614                                         client_write(state);
 615                         }
 616                 }
 617
 618                 /* Check signal handling things */
 619
 620                 if (do_sigterm)
 621                         terminate();
 622
 623                 if (do_sighup) {
 624
 625                         /* Flush winbindd cache */
 626
 627                         flush_caches();
 628                         reload_services_file(True);
 629                         do_sighup = False;
 630                 }
 631
 632                 if (do_sigusr2) {
 633                         print_winbindd_status();
 634                         do_sigusr2 = False;
 635                 }
 636         }
 637 }
 638
 639 /* Main function */
 640
 641 struct winbindd_state server_state;   /* Server state information */
 642
 643 int main(int argc, char **argv)
 644 {
 645         extern pstring global_myname;
 646         extern fstring global_myworkgroup;
 647         extern BOOL append_log;
 648         pstring logfile;
 649         int accept_sock;
 650         BOOL interactive = False;
 651         int opt, new_debuglevel = -1;
 652
 653         /* glibc (?) likes to print "User defined signal 1" and exit if a
 654            SIGUSR2 is received before a handler is installed */
 655
 656         CatchSignal(SIGUSR2, SIG_IGN);
 657
 658         fault_setup((void (*)(void *))fault_quit );
 659
 660         /* Append to log file by default as we are a single process daemon
 661            program. */
 662
 663         append_log = True;
 664
 665         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 666         lp_set_logfile(logfile);
 667
 668         /* Initialise for running in non-root mode */
 669
 670         sec_init();
 671
 672         /* Set environment variable so we don't recursively call ourselves.
 673            This may also be useful interactively. */
 674
 675         SETENV(WINBINDD_DONT_ENV, "1", 1);
 676
 677         /* Initialise samba/rpc client stuff */
 678
 679         while ((opt = getopt(argc, argv, "id:s:n")) != EOF) {
 680                 switch (opt) {
 681
 682                         /* Don't become a daemon */
 683                 case 'i':
 684                         interactive = True;
 685                         break;
 686
 687                         /* disable cacheing */
 688                 case 'n':
 689                         opt_nocache = True;
 690                         break;
 691
 692                         /* Run with specified debug level */
 693                 case 'd':
 694                         new_debuglevel = atoi(optarg);
 695                         break;
 696
 697                         /* Load a different smb.conf file */
 698                 case 's':
 699                         pstrcpy(dyn_CONFIGFILE,optarg);
 700                         break;
 701
 702                 default:
 703                         printf("Unknown option %c\n", (char)opt);
 704                         exit(1);
 705                 }
 706         }
 707
 708         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 709         lp_set_logfile(logfile);
 710         setup_logging("winbindd", interactive);
 711         reopen_logs();
 712
 713         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 714         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
 715
 716         if (!reload_services_file(False)) {
 717                 DEBUG(0, ("error opening config file\n"));
 718                 exit(1);
 719         }
 720
 721         /* Setup names. */
 722         if (!*global_myname) {
 723                 char *p;
 724
 725                 fstrcpy(global_myname, myhostname());
 726                 p = strchr(global_myname, '.');
 727                 if (p)
 728                         *p = 0;
 729         }
 730
 731         fstrcpy(global_myworkgroup, lp_workgroup());
 732
 733         if (new_debuglevel != -1)
 734                 DEBUGLEVEL = new_debuglevel;
 735
 736         if (!interactive)
 737                 become_daemon();
 738
 739 #if HAVE_SETPGID
 740         /*
 741          * If we're interactive we want to set our own process group for
 742          * signal management.
 743          */
 744         if (interactive)
 745                 setpgid( (pid_t)0, (pid_t)0);
 746 #endif
 747
 748         load_interfaces();
 749
 750         secrets_init();
 751
 752         /* Get list of domains we look up requests for.  This includes the
 753            domain which we are a member of as well as any trusted
 754            domains. */
 755
 756         init_domain_list();
 757
 758         ZERO_STRUCT(server_state);
 759
 760         /* Winbind daemon initialisation */
 761
 762         if (!winbindd_param_init())
 763                 return 1;
 764
 765         if (!winbindd_idmap_init())
 766                 return 1;
 767
 768         /* Unblock all signals we are interested in as they may have been
 769            blocked by the parent process. */
 770
 771         BlockSignals(False, SIGINT);
 772         BlockSignals(False, SIGQUIT);
 773         BlockSignals(False, SIGTERM);
 774         BlockSignals(False, SIGUSR2);
 775         BlockSignals(False, SIGHUP);
 776
 777         /* Setup signal handlers */
 778
 779         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 780         CatchSignal(SIGQUIT, termination_handler);
 781         CatchSignal(SIGTERM, termination_handler);
 782
 783         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 784         CatchSignal(SIGUSR1, SIG_IGN);                 /* Samba messages */
 785
 786         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 787         CatchSignal(SIGHUP, sighup_handler);
 788
 789         /* Create UNIX domain socket */
 790
 791         if ((accept_sock = create_sock()) == -1) {
 792                 DEBUG(0, ("failed to create socket\n"));
 793                 return 1;
 794         }
 795
 796         /* Loop waiting for requests */
 797
 798         process_loop(accept_sock);
 799
 800         uni_group_cache_shutdown();
 801         return 0;
 802 }