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 2000-2002
   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 BOOL opt_nocache = False;
  27 BOOL opt_dual_daemon = False;
  28
  29 /* Reload configuration */
  30
  31 static BOOL reload_services_file(BOOL test)
  32 {
  33         BOOL ret;
  34         pstring logfile;
  35
  36         if (lp_loaded()) {
  37                 pstring fname;
  38
  39                 pstrcpy(fname,lp_configfile());
  40                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
  41                         pstrcpy(dyn_CONFIGFILE,fname);
  42                         test = False;
  43                 }
  44         }
  45
  46         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  47         lp_set_logfile(logfile);
  48
  49         reopen_logs();
  50         ret = lp_load(dyn_CONFIGFILE,False,False,True);
  51
  52         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  53         lp_set_logfile(logfile);
  54
  55         reopen_logs();
  56         load_interfaces();
  57
  58         return(ret);
  59 }
  60
  61 /*******************************************************************
  62  Print out all talloc memory info.
  63 ********************************************************************/
  64
  65 void return_all_talloc_info(int msg_type, pid_t src_pid, void *buf, size_t len)
  66 {
  67         TALLOC_CTX *ctx = talloc_init("info context");
  68         char *info = NULL;
  69
  70         if (!ctx)
  71                 return;
  72
  73         info = talloc_describe_all(ctx);
  74         if (info)
  75                 DEBUG(10,(info));
  76         message_send_pid(src_pid, MSG_TALLOC_USAGE, info, info ? strlen(info) + 1: 0, True);
  77         talloc_destroy(ctx);
  78 }
  79
  80 #if DUMP_CORE
  81
  82 /**************************************************************************** **
  83  Prepare to dump a core file - carefully!
  84  **************************************************************************** */
  85
  86 static BOOL dump_core(void)
  87 {
  88         char *p;
  89         pstring dname;
  90         pstrcpy( dname, lp_logfile() );
  91         if ((p=strrchr(dname,'/')))
  92                 *p=0;
  93         pstrcat( dname, "/corefiles" );
  94         mkdir( dname, 0700 );
  95         sys_chown( dname, getuid(), getgid() );
  96         chmod( dname, 0700 );
  97         if ( chdir(dname) )
  98                 return( False );
  99         umask( ~(0700) );
 100
 101 #ifdef HAVE_GETRLIMIT
 102 #ifdef RLIMIT_CORE
 103         {
 104                 struct rlimit rlp;
 105                 getrlimit( RLIMIT_CORE, &rlp );
 106                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
 107                 setrlimit( RLIMIT_CORE, &rlp );
 108                 getrlimit( RLIMIT_CORE, &rlp );
 109                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
 110         }
 111 #endif
 112 #endif
 113
 114         DEBUG(0,("Dumping core in %s\n",dname));
 115         abort();
 116         return( True );
 117 } /* dump_core */
 118 #endif
 119
 120 /**************************************************************************** **
 121  Handle a fault..
 122  **************************************************************************** */
 123
 124 static void fault_quit(void)
 125 {
 126 #if DUMP_CORE
 127         dump_core();
 128 #endif
 129 }
 130
 131 static void winbindd_status(void)
 132 {
 133         struct winbindd_cli_state *tmp;
 134
 135         DEBUG(0, ("winbindd status:\n"));
 136
 137         /* Print client state information */
 138
 139         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 140
 141         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 142                 DEBUG(2, ("\tclient list:\n"));
 143                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 144                         DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
 145                                   tmp->pid, tmp->sock, tmp->read_buf_len,
 146                                   tmp->write_buf_len));
 147                 }
 148         }
 149 }
 150
 151 /* Print winbindd status to log file */
 152
 153 static void print_winbindd_status(void)
 154 {
 155         winbindd_status();
 156         winbindd_idmap_status();
 157         winbindd_cm_status();
 158 }
 159
 160 /* Flush client cache */
 161
 162 static void flush_caches(void)
 163 {
 164         /* Clear cached user and group enumation info */
 165         wcache_flush_cache();
 166 }
 167
 168 /* Handle the signal by unlinking socket and exiting */
 169
 170 static void terminate(void)
 171 {
 172         pstring path;
 173
 174         winbindd_idmap_close();
 175
 176         /* Remove socket file */
 177         snprintf(path, sizeof(path), "%s/%s",
 178                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 179         unlink(path);
 180         exit(0);
 181 }
 182
 183 static BOOL do_sigterm;
 184
 185 static void termination_handler(int signum)
 186 {
 187         do_sigterm = True;
 188         sys_select_signal();
 189 }
 190
 191 static BOOL do_sigusr2;
 192
 193 static void sigusr2_handler(int signum)
 194 {
 195         do_sigusr2 = True;
 196         sys_select_signal();
 197 }
 198
 199 static BOOL do_sighup;
 200
 201 static void sighup_handler(int signum)
 202 {
 203         do_sighup = True;
 204         sys_select_signal();
 205 }
 206
 207 struct dispatch_table {
 208         enum winbindd_cmd cmd;
 209         enum winbindd_result (*fn)(struct winbindd_cli_state *state);
 210         const char *winbindd_cmd_name;
 211 };
 212
 213 static struct dispatch_table dispatch_table[] = {
 214
 215         /* User functions */
 216
 217         { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
 218         { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
 219
 220         { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
 221         { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
 222         { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
 223
 224         { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
 225
 226         /* Group functions */
 227
 228         { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
 229         { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
 230         { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
 231         { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
 232         { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
 233         { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
 234
 235         /* PAM auth functions */
 236
 237         { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
 238         { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
 239         { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
 240
 241         /* Enumeration functions */
 242
 243         { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
 244         { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
 245         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
 246         { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
 247
 248         /* SID related functions */
 249
 250         { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
 251         { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
 252
 253         /* Lookup related functions */
 254
 255         { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
 256         { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
 257         { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
 258         { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
 259
 260         /* Miscellaneous */
 261
 262         { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
 263         { WINBINDD_PING, winbindd_ping, "PING" },
 264         { WINBINDD_INFO, winbindd_info, "INFO" },
 265         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
 266         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 267
 268         /* WINS functions */
 269
 270         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 271         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 272
 273         /* End of list */
 274
 275         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 276 };
 277
 278 static void process_request(struct winbindd_cli_state *state)
 279 {
 280         struct dispatch_table *table = dispatch_table;
 281
 282         /* Free response data - we may be interrupted and receive another
 283            command before being able to send this data off. */
 284
 285         SAFE_FREE(state->response.extra_data);
 286
 287         ZERO_STRUCT(state->response);
 288
 289         state->response.result = WINBINDD_ERROR;
 290         state->response.length = sizeof(struct winbindd_response);
 291
 292         /* Process command */
 293
 294         for (table = dispatch_table; table->fn; table++) {
 295                 if (state->request.cmd == table->cmd) {
 296                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 297                         state->response.result = table->fn(state);
 298                         break;
 299                 }
 300         }
 301
 302         if (!table->fn)
 303                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 304
 305         /* In case extra data pointer is NULL */
 306
 307         if (!state->response.extra_data)
 308                 state->response.length = sizeof(struct winbindd_response);
 309 }
 310
 311 /* Process a new connection by adding it to the client connection list */
 312
 313 static void new_connection(int listen_sock)
 314 {
 315         struct sockaddr_un sunaddr;
 316         struct winbindd_cli_state *state;
 317         socklen_t len;
 318         int sock;
 319
 320         /* Accept connection */
 321
 322         len = sizeof(sunaddr);
 323
 324         do {
 325                 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
 326         } while (sock == -1 && errno == EINTR);
 327
 328         if (sock == -1)
 329                 return;
 330
 331         DEBUG(6,("accepted socket %d\n", sock));
 332
 333         /* Create new connection structure */
 334
 335         if ((state = (struct winbindd_cli_state *)
 336              malloc(sizeof(*state))) == NULL)
 337                 return;
 338
 339         ZERO_STRUCTP(state);
 340         state->sock = sock;
 341
 342         /* Add to connection list */
 343
 344         winbindd_add_client(state);
 345 }
 346
 347 /* Remove a client connection from client connection list */
 348
 349 static void remove_client(struct winbindd_cli_state *state)
 350 {
 351         /* It's a dead client - hold a funeral */
 352
 353         if (state != NULL) {
 354
 355                 /* Close socket */
 356
 357                 close(state->sock);
 358
 359                 /* Free any getent state */
 360
 361                 free_getent_state(state->getpwent_state);
 362                 free_getent_state(state->getgrent_state);
 363
 364                 /* We may have some extra data that was not freed if the
 365                    client was killed unexpectedly */
 366
 367                 SAFE_FREE(state->response.extra_data);
 368
 369                 /* Remove from list and free */
 370
 371                 winbindd_remove_client(state);
 372                 SAFE_FREE(state);
 373         }
 374 }
 375
 376
 377 /* Process a complete received packet from a client */
 378
 379 void winbind_process_packet(struct winbindd_cli_state *state)
 380 {
 381         /* Process request */
 382
 383         /* Ensure null termination of entire request */
 384         state->request.null_term = '\0';
 385
 386         state->pid = state->request.pid;
 387
 388         process_request(state);
 389
 390         /* Update client state */
 391
 392         state->read_buf_len = 0;
 393         state->write_buf_len = sizeof(struct winbindd_response);
 394
 395         /* we might need to send it to the dual daemon */
 396         if (opt_dual_daemon) {
 397                 dual_send_request(state);
 398         }
 399 }
 400
 401 /* Read some data from a client connection */
 402
 403 void winbind_client_read(struct winbindd_cli_state *state)
 404 {
 405         int n;
 406
 407         /* Read data */
 408
 409         n = sys_read(state->sock, state->read_buf_len +
 410                  (char *)&state->request,
 411                  sizeof(state->request) - state->read_buf_len);
 412
 413         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 414
 415         /* Read failed, kill client */
 416
 417         if (n == -1 || n == 0) {
 418                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 419                          state->sock, state->pid,
 420                          (n == -1) ? strerror(errno) : "EOF"));
 421
 422                 state->finished = True;
 423                 return;
 424         }
 425
 426         /* Update client state */
 427
 428         state->read_buf_len += n;
 429 }
 430
 431 /* Write some data to a client connection */
 432
 433 static void client_write(struct winbindd_cli_state *state)
 434 {
 435         char *data;
 436         int num_written;
 437
 438         /* Write some data */
 439
 440         if (!state->write_extra_data) {
 441
 442                 /* Write response structure */
 443
 444                 data = (char *)&state->response + sizeof(state->response) -
 445                         state->write_buf_len;
 446
 447         } else {
 448
 449                 /* Write extra data */
 450
 451                 data = (char *)state->response.extra_data +
 452                         state->response.length -
 453                         sizeof(struct winbindd_response) -
 454                         state->write_buf_len;
 455         }
 456
 457         num_written = sys_write(state->sock, data, state->write_buf_len);
 458
 459         DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
 460
 461         /* Write failed, kill cilent */
 462
 463         if (num_written == -1 || num_written == 0) {
 464
 465                 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
 466                          state->sock, state->pid,
 467                          (num_written == -1) ? strerror(errno) : "EOF"));
 468
 469                 state->finished = True;
 470
 471                 SAFE_FREE(state->response.extra_data);
 472
 473                 return;
 474         }
 475
 476         /* Update client state */
 477
 478         state->write_buf_len -= num_written;
 479
 480         /* Have we written all data? */
 481
 482         if (state->write_buf_len == 0) {
 483
 484                 /* Take care of extra data */
 485
 486                 if (state->write_extra_data) {
 487
 488                         SAFE_FREE(state->response.extra_data);
 489
 490                         state->write_extra_data = False;
 491
 492                         DEBUG(10,("client_write: client_write: complete response written.\n"));
 493
 494                 } else if (state->response.length >
 495                            sizeof(struct winbindd_response)) {
 496
 497                         /* Start writing extra data */
 498
 499                         state->write_buf_len =
 500                                 state->response.length -
 501                                 sizeof(struct winbindd_response);
 502
 503                         DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
 504
 505                         state->write_extra_data = True;
 506                 }
 507         }
 508 }
 509
 510 /* Process incoming clients on accept_sock.  We use a tricky non-blocking,
 511    non-forking, non-threaded model which allows us to handle many
 512    simultaneous connections while remaining impervious to many denial of
 513    service attacks. */
 514
 515 static void process_loop(void)
 516 {
 517         /* We'll be doing this a lot */
 518
 519         while (1) {
 520                 struct winbindd_cli_state *state;
 521                 fd_set r_fds, w_fds;
 522                 int maxfd, listen_sock, selret;
 523                 struct timeval timeout;
 524
 525                 /* Handle messages */
 526
 527                 message_dispatch();
 528
 529                 /* rescan the trusted domains list. This must be done
 530                    regularly to cope with transitive trusts */
 531                 rescan_trusted_domains();
 532
 533                 /* Free up temporary memory */
 534
 535                 lp_talloc_free();
 536                 main_loop_talloc_free();
 537
 538                 /* Initialise fd lists for select() */
 539
 540                 listen_sock = open_winbindd_socket();
 541
 542                 if (listen_sock == -1) {
 543                         perror("open_winbind_socket");
 544                         exit(1);
 545                 }
 546
 547                 maxfd = listen_sock;
 548
 549                 FD_ZERO(&r_fds);
 550                 FD_ZERO(&w_fds);
 551                 FD_SET(listen_sock, &r_fds);
 552
 553                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 554                 timeout.tv_usec = 0;
 555
 556                 if (opt_dual_daemon) {
 557                         maxfd = dual_select_setup(&w_fds, maxfd);
 558                 }
 559
 560                 /* Set up client readers and writers */
 561
 562                 state = winbindd_client_list();
 563
 564                 while (state) {
 565
 566                         /* Dispose of client connection if it is marked as
 567                            finished */
 568
 569                         if (state->finished) {
 570                                 struct winbindd_cli_state *next = state->next;
 571
 572                                 remove_client(state);
 573                                 state = next;
 574                                 continue;
 575                         }
 576
 577                         /* Select requires we know the highest fd used */
 578
 579                         if (state->sock > maxfd)
 580                                 maxfd = state->sock;
 581
 582                         /* Add fd for reading */
 583
 584                         if (state->read_buf_len != sizeof(state->request))
 585                                 FD_SET(state->sock, &r_fds);
 586
 587                         /* Add fd for writing */
 588
 589                         if (state->write_buf_len)
 590                                 FD_SET(state->sock, &w_fds);
 591
 592                         state = state->next;
 593                 }
 594
 595                 /* Call select */
 596
 597                 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 598
 599                 if (selret == 0)
 600                         continue;
 601
 602                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 603
 604                         /* Select error, something is badly wrong */
 605
 606                         perror("select");
 607                         exit(1);
 608                 }
 609
 610                 /* Create a new connection if accept_sock readable */
 611
 612                 if (selret > 0) {
 613
 614                         if (opt_dual_daemon) {
 615                                 dual_select(&w_fds);
 616                         }
 617
 618                         if (FD_ISSET(listen_sock, &r_fds))
 619                                 new_connection(listen_sock);
 620
 621                         /* Process activity on client connections */
 622
 623                         for (state = winbindd_client_list(); state;
 624                              state = state->next) {
 625
 626                                 /* Data available for reading */
 627
 628                                 if (FD_ISSET(state->sock, &r_fds)) {
 629
 630                                         /* Read data */
 631
 632                                         winbind_client_read(state);
 633
 634                                         /*
 635                                          * If we have the start of a
 636                                          * packet, then check the
 637                                          * length field to make sure
 638                                          * the client's not talking
 639                                          * Mock Swedish.
 640                                          */
 641
 642                                         if (state->read_buf_len >= sizeof(uint32)
 643                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 644                                                 DEBUG(0,("process_loop: Invalid request size from pid %d: %d bytes sent, should be %d\n",
 645                                                                 state->request.pid, *(uint32 *) &state->request, sizeof(state->request)));
 646
 647                                                 remove_client(state);
 648                                                 break;
 649                                         }
 650
 651                                         /* A request packet might be
 652                                            complete */
 653
 654                                         if (state->read_buf_len ==
 655                                             sizeof(state->request)) {
 656                                                 winbind_process_packet(state);
 657                                         }
 658                                 }
 659
 660                                 /* Data available for writing */
 661
 662                                 if (FD_ISSET(state->sock, &w_fds))
 663                                         client_write(state);
 664                         }
 665                 }
 666
 667 #if 0
 668                 winbindd_check_cache_size(time(NULL));
 669 #endif
 670
 671                 /* Check signal handling things */
 672
 673                 if (do_sigterm)
 674                         terminate();
 675
 676                 if (do_sighup) {
 677
 678                         DEBUG(3, ("got SIGHUP\n"));
 679
 680                         /* Flush various caches */
 681
 682                         flush_caches();
 683                         reload_services_file(True);
 684                         do_sighup = False;
 685                 }
 686
 687                 if (do_sigusr2) {
 688                         print_winbindd_status();
 689                         do_sigusr2 = False;
 690                 }
 691         }
 692 }
 693
 694
 695 /*
 696   these are split out from the main winbindd for use by the background daemon
 697  */
 698 BOOL winbind_setup_common(void)
 699 {
 700         load_interfaces();
 701
 702         if (!secrets_init()) {
 703
 704                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
 705                 return False;
 706         }
 707
 708         namecache_enable();     /* Enable netbios namecache */
 709
 710         /* Check winbindd parameters are valid */
 711
 712         ZERO_STRUCT(server_state);
 713
 714         if (!winbindd_param_init())
 715                 return False;
 716
 717         /* Get list of domains we look up requests for.  This includes the
 718            domain which we are a member of as well as any trusted
 719            domains. */
 720
 721         init_domain_list();
 722
 723         /* Winbind daemon initialisation */
 724
 725         if (!winbindd_idmap_init())
 726                 return False;
 727
 728         /* Unblock all signals we are interested in as they may have been
 729            blocked by the parent process. */
 730
 731         BlockSignals(False, SIGINT);
 732         BlockSignals(False, SIGQUIT);
 733         BlockSignals(False, SIGTERM);
 734         BlockSignals(False, SIGUSR1);
 735         BlockSignals(False, SIGUSR2);
 736         BlockSignals(False, SIGHUP);
 737
 738         /* Setup signal handlers */
 739
 740         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 741         CatchSignal(SIGQUIT, termination_handler);
 742         CatchSignal(SIGTERM, termination_handler);
 743
 744         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 745
 746         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 747         CatchSignal(SIGHUP, sighup_handler);
 748
 749         return True;
 750 }
 751
 752
 753 /* Main function */
 754
 755 struct winbindd_state server_state;   /* Server state information */
 756
 757
 758 static void usage(void)
 759 {
 760         printf("Usage: winbindd [options]\n");
 761         printf("\t-F                daemon in foreground mode\n");
 762         printf("\t-S                log to stdout\n");
 763         printf("\t-i                interactive mode\n");
 764         printf("\t-B                dual daemon mode\n");
 765         printf("\t-n                disable cacheing\n");
 766         printf("\t-d level          set debug level\n");
 767         printf("\t-s configfile     choose smb.conf location\n");
 768         printf("\t-h                show this help message\n");
 769 }
 770
 771  int main(int argc, char **argv)
 772 {
 773         extern BOOL AllowDebugChange;
 774         pstring logfile;
 775         BOOL interactive = False;
 776         BOOL Fork = True;
 777         BOOL log_stdout = False;
 778         int opt;
 779
 780         /* glibc (?) likes to print "User defined signal 1" and exit if a
 781            SIGUSR[12] is received before a handler is installed */
 782
 783         CatchSignal(SIGUSR1, SIG_IGN);
 784         CatchSignal(SIGUSR2, SIG_IGN);
 785
 786         fault_setup((void (*)(void *))fault_quit );
 787
 788         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 789         lp_set_logfile(logfile);
 790
 791         /* Initialise for running in non-root mode */
 792
 793         sec_init();
 794
 795         /* Set environment variable so we don't recursively call ourselves.
 796            This may also be useful interactively. */
 797
 798         SETENV(WINBINDD_DONT_ENV, "1", 1);
 799
 800         /* Initialise samba/rpc client stuff */
 801
 802         while ((opt = getopt(argc, argv, "FSid:s:nhB")) != EOF) {
 803                 switch (opt) {
 804
 805                 case 'F':
 806                         Fork = False;
 807                         break;
 808                 case 'S':
 809                         log_stdout = True;
 810                         break;
 811                         /* Don't become a daemon */
 812                 case 'i':
 813                         interactive = True;
 814                         log_stdout = True;
 815                         Fork = False;
 816                         break;
 817
 818                         /* dual daemon system */
 819                 case 'B':
 820                         opt_dual_daemon = True;
 821                         break;
 822
 823                         /* disable cacheing */
 824                 case 'n':
 825                         opt_nocache = True;
 826                         break;
 827
 828                         /* Run with specified debug level */
 829                 case 'd':
 830                         DEBUGLEVEL = atoi(optarg);
 831                         AllowDebugChange = False;
 832                         break;
 833
 834                         /* Load a different smb.conf file */
 835                 case 's':
 836                         pstrcpy(dyn_CONFIGFILE,optarg);
 837                         break;
 838
 839                 case 'h':
 840                         usage();
 841                         exit(0);
 842
 843                 default:
 844                         printf("Unknown option %c\n", (char)opt);
 845                         exit(1);
 846                 }
 847         }
 848
 849         if (log_stdout && Fork) {
 850                 printf("Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n");
 851                 usage();
 852                 exit(1);
 853         }
 854
 855         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 856         lp_set_logfile(logfile);
 857         setup_logging("winbindd", log_stdout);
 858         reopen_logs();
 859
 860         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 861         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
 862
 863         if (!reload_services_file(False)) {
 864                 DEBUG(0, ("error opening config file\n"));
 865                 exit(1);
 866         }
 867
 868         /* Setup names. */
 869
 870         if (!init_names())
 871                 exit(1);
 872
 873         if (!interactive) {
 874                 become_daemon(Fork);
 875                 pidfile_create("winbindd");
 876         }
 877
 878
 879 #if HAVE_SETPGID
 880         /*
 881          * If we're interactive we want to set our own process group for
 882          * signal management.
 883          */
 884         if (interactive)
 885                 setpgid( (pid_t)0, (pid_t)0);
 886 #endif
 887
 888         if (!winbind_setup_common()) {
 889                 return 1;
 890         }
 891
 892         if (opt_dual_daemon) {
 893                 do_dual_daemon();
 894         }
 895
 896         /* Initialise messaging system */
 897
 898         if (!message_init()) {
 899                 DEBUG(0, ("unable to initialise messaging system\n"));
 900                 exit(1);
 901         }
 902
 903         register_msg_pool_usage();
 904         message_register(MSG_REQ_TALLOC_USAGE, return_all_talloc_info);
 905
 906         /* Loop waiting for requests */
 907
 908         process_loop();
 909
 910         uni_group_cache_shutdown();
 911         return 0;
 912 }