source3/nsswitch/winbindd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) by Tim Potter 2000, 2001
   7    Copyright (C) Andrew Tridgell 2002
   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 static struct winbindd_cli_state *client_list;
  29 static int num_clients;
  30 BOOL opt_nocache = False;
  31 BOOL opt_dual_daemon = False;
  32
  33 /* Reload configuration */
  34
  35 static BOOL reload_services_file(BOOL test)
  36 {
  37         BOOL ret;
  38         pstring logfile;
  39
  40         if (lp_loaded()) {
  41                 pstring fname;
  42
  43                 pstrcpy(fname,lp_configfile());
  44                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
  45                         pstrcpy(dyn_CONFIGFILE,fname);
  46                         test = False;
  47                 }
  48         }
  49
  50         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  51         lp_set_logfile(logfile);
  52
  53         reopen_logs();
  54         ret = lp_load(dyn_CONFIGFILE,False,False,True);
  55
  56         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  57         lp_set_logfile(logfile);
  58
  59         reopen_logs();
  60         load_interfaces();
  61
  62         return(ret);
  63 }
  64
  65 #if DUMP_CORE
  66
  67 /**************************************************************************** **
  68  Prepare to dump a core file - carefully!
  69  **************************************************************************** */
  70
  71 static BOOL dump_core(void)
  72 {
  73         char *p;
  74         pstring dname;
  75         pstrcpy( dname, lp_logfile() );
  76         if ((p=strrchr(dname,'/')))
  77                 *p=0;
  78         pstrcat( dname, "/corefiles" );
  79         mkdir( dname, 0700 );
  80         sys_chown( dname, getuid(), getgid() );
  81         chmod( dname, 0700 );
  82         if ( chdir(dname) )
  83                 return( False );
  84         umask( ~(0700) );
  85
  86 #ifdef HAVE_GETRLIMIT
  87 #ifdef RLIMIT_CORE
  88         {
  89                 struct rlimit rlp;
  90                 getrlimit( RLIMIT_CORE, &rlp );
  91                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
  92                 setrlimit( RLIMIT_CORE, &rlp );
  93                 getrlimit( RLIMIT_CORE, &rlp );
  94                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
  95         }
  96 #endif
  97 #endif
  98
  99         DEBUG(0,("Dumping core in %s\n",dname));
 100         abort();
 101         return( True );
 102 } /* dump_core */
 103 #endif
 104
 105 /**************************************************************************** **
 106  Handle a fault..
 107  **************************************************************************** */
 108
 109 static void fault_quit(void)
 110 {
 111 #if DUMP_CORE
 112         dump_core();
 113 #endif
 114 }
 115
 116 static void winbindd_status(void)
 117 {
 118         struct winbindd_cli_state *tmp;
 119
 120         DEBUG(0, ("winbindd status:\n"));
 121
 122         /* Print client state information */
 123
 124         DEBUG(0, ("\t%d clients currently active\n", num_clients));
 125
 126         if (DEBUGLEVEL >= 2 && num_clients) {
 127                 DEBUG(2, ("\tclient list:\n"));
 128                 for(tmp = client_list; tmp; tmp = tmp->next) {
 129                         DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
 130                                   tmp->pid, tmp->sock, tmp->read_buf_len,
 131                                   tmp->write_buf_len));
 132                 }
 133         }
 134 }
 135
 136 /* Print winbindd status to log file */
 137
 138 static void print_winbindd_status(void)
 139 {
 140         winbindd_status();
 141         winbindd_idmap_status();
 142         winbindd_cm_status();
 143 }
 144
 145 /* Flush client cache */
 146
 147 static void flush_caches(void)
 148 {
 149         /* Clear cached user and group enumation info */
 150         wcache_flush_cache();
 151 }
 152
 153 /* Handle the signal by unlinking socket and exiting */
 154
 155 static void terminate(void)
 156 {
 157         pstring path;
 158
 159         winbindd_idmap_close();
 160
 161         /* Remove socket file */
 162         snprintf(path, sizeof(path), "%s/%s",
 163                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 164         unlink(path);
 165         exit(0);
 166 }
 167
 168 static BOOL do_sigterm;
 169
 170 static void termination_handler(int signum)
 171 {
 172         do_sigterm = True;
 173         sys_select_signal();
 174 }
 175
 176 static BOOL do_sigusr2;
 177
 178 static void sigusr2_handler(int signum)
 179 {
 180         do_sigusr2 = True;
 181         sys_select_signal();
 182 }
 183
 184 static BOOL do_sighup;
 185
 186 static void sighup_handler(int signum)
 187 {
 188         do_sighup = True;
 189         sys_select_signal();
 190 }
 191
 192 /* Create winbindd socket */
 193
 194 static int create_sock(void)
 195 {
 196         return create_pipe_sock( WINBINDD_SOCKET_DIR,
 197                                  WINBINDD_SOCKET_NAME, 0755);
 198 }
 199
 200 struct dispatch_table {
 201         enum winbindd_cmd cmd;
 202         enum winbindd_result (*fn)(struct winbindd_cli_state *state);
 203         char *winbindd_cmd_name;
 204 };
 205
 206 static struct dispatch_table dispatch_table[] = {
 207
 208         /* User functions */
 209
 210         { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
 211         { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
 212
 213         { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
 214         { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
 215         { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
 216
 217         { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
 218
 219         /* Group functions */
 220
 221         { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
 222         { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
 223         { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
 224         { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
 225         { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
 226         { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
 227
 228         /* PAM auth functions */
 229
 230         { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
 231         { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
 232         { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
 233
 234         /* Enumeration functions */
 235
 236         { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
 237         { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
 238         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
 239         { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
 240
 241         /* SID related functions */
 242
 243         { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
 244         { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
 245
 246         /* Lookup related functions */
 247
 248         { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
 249         { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
 250         { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
 251         { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
 252
 253         /* Miscellaneous */
 254
 255         { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
 256         { WINBINDD_PING, winbindd_ping, "PING" },
 257         { WINBINDD_INFO, winbindd_info, "INFO" },
 258         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
 259         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 260
 261         /* WINS functions */
 262
 263         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 264         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 265
 266         /* End of list */
 267
 268         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 269 };
 270
 271 static void process_request(struct winbindd_cli_state *state)
 272 {
 273         struct dispatch_table *table = dispatch_table;
 274
 275         /* Free response data - we may be interrupted and receive another
 276            command before being able to send this data off. */
 277
 278         SAFE_FREE(state->response.extra_data);
 279
 280         ZERO_STRUCT(state->response);
 281
 282         state->response.result = WINBINDD_ERROR;
 283         state->response.length = sizeof(struct winbindd_response);
 284
 285         /* Process command */
 286
 287         for (table = dispatch_table; table->fn; table++) {
 288                 if (state->request.cmd == table->cmd) {
 289                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 290                         state->response.result = table->fn(state);
 291                         break;
 292                 }
 293         }
 294
 295         if (!table->fn)
 296                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 297
 298         /* In case extra data pointer is NULL */
 299
 300         if (!state->response.extra_data)
 301                 state->response.length = sizeof(struct winbindd_response);
 302 }
 303
 304 /* Process a new connection by adding it to the client connection list */
 305
 306 static void new_connection(int accept_sock)
 307 {
 308         struct sockaddr_un sunaddr;
 309         struct winbindd_cli_state *state;
 310         socklen_t len;
 311         int sock;
 312
 313         /* Accept connection */
 314
 315         len = sizeof(sunaddr);
 316
 317         do {
 318                 sock = accept(accept_sock, (struct sockaddr *)&sunaddr, &len);
 319         } while (sock == -1 && errno == EINTR);
 320
 321         if (sock == -1)
 322                 return;
 323
 324         DEBUG(6,("accepted socket %d\n", sock));
 325
 326         /* Create new connection structure */
 327
 328         if ((state = (struct winbindd_cli_state *)
 329              malloc(sizeof(*state))) == NULL)
 330                 return;
 331
 332         ZERO_STRUCTP(state);
 333         state->sock = sock;
 334
 335         /* Add to connection list */
 336
 337         DLIST_ADD(client_list, state);
 338         num_clients++;
 339 }
 340
 341 /* Remove a client connection from client connection list */
 342
 343 static void remove_client(struct winbindd_cli_state *state)
 344 {
 345         /* It's a dead client - hold a funeral */
 346
 347         if (state != NULL) {
 348
 349                 /* Close socket */
 350
 351                 close(state->sock);
 352
 353                 /* Free any getent state */
 354
 355                 free_getent_state(state->getpwent_state);
 356                 free_getent_state(state->getgrent_state);
 357
 358                 /* We may have some extra data that was not freed if the
 359                    client was killed unexpectedly */
 360
 361                 SAFE_FREE(state->response.extra_data);
 362
 363                 /* Remove from list and free */
 364
 365                 DLIST_REMOVE(client_list, state);
 366                 SAFE_FREE(state);
 367                 num_clients--;
 368         }
 369 }
 370
 371
 372 /* Process a complete received packet from a client */
 373
 374 void winbind_process_packet(struct winbindd_cli_state *state)
 375 {
 376         /* Process request */
 377
 378         /* Ensure null termination of entire request */
 379         state->request.domain[sizeof(state->request.domain)-1]='\0';
 380
 381         state->pid = state->request.pid;
 382
 383         process_request(state);
 384
 385         /* Update client state */
 386
 387         state->read_buf_len = 0;
 388         state->write_buf_len = sizeof(struct winbindd_response);
 389
 390         /* we might need to send it to the dual daemon */
 391         if (opt_dual_daemon) {
 392                 dual_send_request(state);
 393         }
 394 }
 395
 396 /* Read some data from a client connection */
 397
 398 void winbind_client_read(struct winbindd_cli_state *state)
 399 {
 400         int n;
 401
 402         /* Read data */
 403
 404         do {
 405
 406                 n = read(state->sock, state->read_buf_len +
 407                          (char *)&state->request,
 408                          sizeof(state->request) - state->read_buf_len);
 409
 410         } while (n == -1 && errno == EINTR);
 411
 412         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 413
 414         /* Read failed, kill client */
 415
 416         if (n == -1 || n == 0) {
 417                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 418                          state->sock, state->pid,
 419                          (n == -1) ? strerror(errno) : "EOF"));
 420
 421                 state->finished = True;
 422                 return;
 423         }
 424
 425         /* Update client state */
 426
 427         state->read_buf_len += n;
 428 }
 429
 430 /* Write some data to a client connection */
 431
 432 static void client_write(struct winbindd_cli_state *state)
 433 {
 434         char *data;
 435         int num_written;
 436
 437         /* Write some data */
 438
 439         if (!state->write_extra_data) {
 440
 441                 /* Write response structure */
 442
 443                 data = (char *)&state->response + sizeof(state->response) -
 444                         state->write_buf_len;
 445
 446         } else {
 447
 448                 /* Write extra data */
 449
 450                 data = (char *)state->response.extra_data +
 451                         state->response.length -
 452                         sizeof(struct winbindd_response) -
 453                         state->write_buf_len;
 454         }
 455
 456         do {
 457                 num_written = write(state->sock, data, state->write_buf_len);
 458         } while (num_written == -1 && errno == EINTR);
 459
 460         DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
 461
 462         /* Write failed, kill cilent */
 463
 464         if (num_written == -1 || num_written == 0) {
 465
 466                 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
 467                          state->sock, state->pid,
 468                          (num_written == -1) ? strerror(errno) : "EOF"));
 469
 470                 state->finished = True;
 471
 472                 SAFE_FREE(state->response.extra_data);
 473
 474                 return;
 475         }
 476
 477         /* Update client state */
 478
 479         state->write_buf_len -= num_written;
 480
 481         /* Have we written all data? */
 482
 483         if (state->write_buf_len == 0) {
 484
 485                 /* Take care of extra data */
 486
 487                 if (state->write_extra_data) {
 488
 489                         SAFE_FREE(state->response.extra_data);
 490
 491                         state->write_extra_data = False;
 492
 493                         DEBUG(10,("client_write: client_write: complete response written.\n"));
 494
 495                 } else if (state->response.length >
 496                            sizeof(struct winbindd_response)) {
 497
 498                         /* Start writing extra data */
 499
 500                         state->write_buf_len =
 501                                 state->response.length -
 502                                 sizeof(struct winbindd_response);
 503
 504                         DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
 505
 506                         state->write_extra_data = True;
 507                 }
 508         }
 509 }
 510
 511 /* Process incoming clients on accept_sock.  We use a tricky non-blocking,
 512    non-forking, non-threaded model which allows us to handle many
 513    simultaneous connections while remaining impervious to many denial of
 514    service attacks. */
 515
 516 static void process_loop(int accept_sock)
 517 {
 518         /* We'll be doing this a lot */
 519
 520         while (1) {
 521                 struct winbindd_cli_state *state;
 522                 fd_set r_fds, w_fds;
 523                 int maxfd = accept_sock, selret;
 524                 struct timeval timeout;
 525
 526                 /* Handle messages */
 527
 528                 message_dispatch();
 529
 530                 /* Free up temporary memory */
 531
 532                 lp_talloc_free();
 533                 main_loop_talloc_free();
 534
 535                 /* Initialise fd lists for select() */
 536
 537                 FD_ZERO(&r_fds);
 538                 FD_ZERO(&w_fds);
 539                 FD_SET(accept_sock, &r_fds);
 540
 541                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 542                 timeout.tv_usec = 0;
 543
 544                 if (opt_dual_daemon) {
 545                         maxfd = dual_select_setup(&w_fds, maxfd);
 546                 }
 547
 548                 /* Set up client readers and writers */
 549
 550                 state = client_list;
 551
 552                 while (state) {
 553
 554                         /* Dispose of client connection if it is marked as
 555                            finished */
 556
 557                         if (state->finished) {
 558                                 struct winbindd_cli_state *next = state->next;
 559
 560                                 remove_client(state);
 561                                 state = next;
 562                                 continue;
 563                         }
 564
 565                         /* Select requires we know the highest fd used */
 566
 567                         if (state->sock > maxfd)
 568                                 maxfd = state->sock;
 569
 570                         /* Add fd for reading */
 571
 572                         if (state->read_buf_len != sizeof(state->request))
 573                                 FD_SET(state->sock, &r_fds);
 574
 575                         /* Add fd for writing */
 576
 577                         if (state->write_buf_len)
 578                                 FD_SET(state->sock, &w_fds);
 579
 580                         state = state->next;
 581                 }
 582
 583                 /* Call select */
 584
 585                 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 586
 587                 if (selret == 0)
 588                         continue;
 589
 590                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 591
 592                         /* Select error, something is badly wrong */
 593
 594                         perror("select");
 595                         exit(1);
 596                 }
 597
 598                 /* Create a new connection if accept_sock readable */
 599
 600                 if (selret > 0) {
 601
 602                         if (opt_dual_daemon) {
 603                                 dual_select(&w_fds);
 604                         }
 605
 606                         if (FD_ISSET(accept_sock, &r_fds))
 607                                 new_connection(accept_sock);
 608
 609                         /* Process activity on client connections */
 610
 611                         for (state = client_list; state; state = state->next) {
 612
 613                                 /* Data available for reading */
 614
 615                                 if (FD_ISSET(state->sock, &r_fds)) {
 616
 617                                         /* Read data */
 618
 619                                         winbind_client_read(state);
 620
 621                                         /*
 622                                          * If we have the start of a
 623                                          * packet, then check the
 624                                          * length field to make sure
 625                                          * the client's not talking
 626                                          * Mock Swedish.
 627                                          */
 628
 629                                         if (state->read_buf_len >= sizeof(uint32)
 630                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 631                                                 DEBUG(0,("process_loop: Invalid request size from pid %d: %d bytes sent, should be %d\n",
 632                                                                 state->request.pid, *(uint32 *) &state->request, sizeof(state->request)));
 633
 634                                                 remove_client(state);
 635                                                 break;
 636                                         }
 637
 638                                         /* A request packet might be
 639                                            complete */
 640
 641                                         if (state->read_buf_len ==
 642                                             sizeof(state->request)) {
 643                                                 winbind_process_packet(state);
 644                                         }
 645                                 }
 646
 647                                 /* Data available for writing */
 648
 649                                 if (FD_ISSET(state->sock, &w_fds))
 650                                         client_write(state);
 651                         }
 652                 }
 653
 654 #if 0
 655                 winbindd_check_cache_size(time(NULL));
 656 #endif
 657
 658                 /* Check signal handling things */
 659
 660                 if (do_sigterm)
 661                         terminate();
 662
 663                 if (do_sighup) {
 664
 665                         /* Flush winbindd cache */
 666
 667                         flush_caches();
 668                         reload_services_file(True);
 669                         do_sighup = False;
 670                 }
 671
 672                 if (do_sigusr2) {
 673                         print_winbindd_status();
 674                         do_sigusr2 = False;
 675                 }
 676         }
 677 }
 678
 679
 680 /*
 681   these are split out from the main winbindd for use by the background daemon
 682  */
 683 int winbind_setup_common(void)
 684 {
 685         load_interfaces();
 686
 687         if (!secrets_init()) {
 688
 689                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
 690                 return 1;
 691
 692         }
 693
 694         namecache_enable();     /* Enable netbios namecache */
 695
 696         /* Get list of domains we look up requests for.  This includes the
 697            domain which we are a member of as well as any trusted
 698            domains. */
 699
 700         init_domain_list();
 701
 702         ZERO_STRUCT(server_state);
 703
 704         /* Winbind daemon initialisation */
 705
 706         if (!winbindd_param_init())
 707                 return 1;
 708
 709         if (!winbindd_idmap_init())
 710                 return 1;
 711
 712         /* Unblock all signals we are interested in as they may have been
 713            blocked by the parent process. */
 714
 715         BlockSignals(False, SIGINT);
 716         BlockSignals(False, SIGQUIT);
 717         BlockSignals(False, SIGTERM);
 718         BlockSignals(False, SIGUSR1);
 719         BlockSignals(False, SIGUSR2);
 720         BlockSignals(False, SIGHUP);
 721
 722         /* Setup signal handlers */
 723
 724         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 725         CatchSignal(SIGQUIT, termination_handler);
 726         CatchSignal(SIGTERM, termination_handler);
 727
 728         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 729
 730         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 731         CatchSignal(SIGHUP, sighup_handler);
 732
 733         return 0;
 734 }
 735
 736
 737 /* Main function */
 738
 739 struct winbindd_state server_state;   /* Server state information */
 740
 741
 742 static void usage(void)
 743 {
 744         printf("Usage: winbindd [options]\n");
 745         printf("\t-i                interactive mode\n");
 746         printf("\t-B                dual daemon mode\n");
 747         printf("\t-n                disable cacheing\n");
 748         printf("\t-d level          set debug level\n");
 749         printf("\t-s configfile     choose smb.conf location\n");
 750         printf("\t-h                show this help message\n");
 751 }
 752
 753  int main(int argc, char **argv)
 754 {
 755         extern BOOL AllowDebugChange;
 756         extern pstring global_myname;
 757         extern fstring global_myworkgroup;
 758         extern BOOL append_log;
 759         pstring logfile;
 760         int accept_sock;
 761         BOOL interactive = False;
 762         int opt;
 763
 764         /* glibc (?) likes to print "User defined signal 1" and exit if a
 765            SIGUSR[12] is received before a handler is installed */
 766
 767         CatchSignal(SIGUSR1, SIG_IGN);
 768         CatchSignal(SIGUSR2, SIG_IGN);
 769
 770         fault_setup((void (*)(void *))fault_quit );
 771
 772         /* Append to log file by default as we are a single process daemon
 773            program. */
 774
 775         append_log = True;
 776
 777         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 778         lp_set_logfile(logfile);
 779
 780         /* Initialise for running in non-root mode */
 781
 782         sec_init();
 783
 784         /* Set environment variable so we don't recursively call ourselves.
 785            This may also be useful interactively. */
 786
 787         SETENV(WINBINDD_DONT_ENV, "1", 1);
 788
 789         /* Initialise samba/rpc client stuff */
 790
 791         while ((opt = getopt(argc, argv, "id:s:nhB")) != EOF) {
 792                 switch (opt) {
 793
 794                         /* Don't become a daemon */
 795                 case 'i':
 796                         interactive = True;
 797                         break;
 798
 799                         /* dual daemon system */
 800                 case 'B':
 801                         opt_dual_daemon = True;
 802                         break;
 803
 804                         /* disable cacheing */
 805                 case 'n':
 806                         opt_nocache = True;
 807                         break;
 808
 809                         /* Run with specified debug level */
 810                 case 'd':
 811                         DEBUGLEVEL = atoi(optarg);
 812                         AllowDebugChange = False;
 813                         break;
 814
 815                         /* Load a different smb.conf file */
 816                 case 's':
 817                         pstrcpy(dyn_CONFIGFILE,optarg);
 818                         break;
 819
 820                 case 'h':
 821                         usage();
 822                         exit(0);
 823
 824                 default:
 825                         printf("Unknown option %c\n", (char)opt);
 826                         exit(1);
 827                 }
 828         }
 829
 830         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 831         lp_set_logfile(logfile);
 832         setup_logging("winbindd", interactive);
 833         reopen_logs();
 834
 835         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 836         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
 837
 838         if (!reload_services_file(False)) {
 839                 DEBUG(0, ("error opening config file\n"));
 840                 exit(1);
 841         }
 842
 843         /* Setup names. */
 844
 845         if (!*global_myname) {
 846                 char *p;
 847
 848                 fstrcpy(global_myname, myhostname());
 849                 p = strchr(global_myname, '.');
 850                 if (p)
 851                         *p = 0;
 852         }
 853
 854         fstrcpy(global_myworkgroup, lp_workgroup());
 855
 856         if (!interactive) {
 857                 become_daemon();
 858                 pidfile_create("winbindd");
 859         }
 860
 861
 862 #if HAVE_SETPGID
 863         /*
 864          * If we're interactive we want to set our own process group for
 865          * signal management.
 866          */
 867         if (interactive)
 868                 setpgid( (pid_t)0, (pid_t)0);
 869 #endif
 870
 871         if (opt_dual_daemon) {
 872                 do_dual_daemon();
 873         }
 874
 875         if (winbind_setup_common() != 0) {
 876                 return 1;
 877         }
 878
 879         /* Initialise messaging system */
 880
 881         if (!message_init()) {
 882                 DEBUG(0, ("unable to initialise messaging system\n"));
 883                 exit(1);
 884         }
 885
 886         register_msg_pool_usage();
 887
 888         /* Create UNIX domain socket */
 889
 890         if ((accept_sock = create_sock()) == -1) {
 891                 DEBUG(0, ("failed to create socket\n"));
 892                 return 1;
 893         }
 894
 895         /* Loop waiting for requests */
 896
 897         process_loop(accept_sock);
 898
 899         uni_group_cache_shutdown();
 900         return 0;
 901 }