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         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 268
 269         /* WINS functions */
 270
 271         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 272         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 273
 274         /* End of list */
 275
 276         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 277 };
 278
 279 static void process_request(struct winbindd_cli_state *state)
 280 {
 281         struct dispatch_table *table = dispatch_table;
 282
 283         /* Free response data - we may be interrupted and receive another
 284            command before being able to send this data off. */
 285
 286         SAFE_FREE(state->response.extra_data);
 287
 288         ZERO_STRUCT(state->response);
 289
 290         state->response.result = WINBINDD_ERROR;
 291         state->response.length = sizeof(struct winbindd_response);
 292
 293         /* Process command */
 294
 295         for (table = dispatch_table; table->fn; table++) {
 296                 if (state->request.cmd == table->cmd) {
 297                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 298                         state->response.result = table->fn(state);
 299                         break;
 300                 }
 301         }
 302
 303         if (!table->fn)
 304                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 305
 306         /* In case extra data pointer is NULL */
 307
 308         if (!state->response.extra_data)
 309                 state->response.length = sizeof(struct winbindd_response);
 310 }
 311
 312 /* Process a new connection by adding it to the client connection list */
 313
 314 static void new_connection(int listen_sock)
 315 {
 316         struct sockaddr_un sunaddr;
 317         struct winbindd_cli_state *state;
 318         socklen_t len;
 319         int sock;
 320
 321         /* Accept connection */
 322
 323         len = sizeof(sunaddr);
 324
 325         do {
 326                 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
 327         } while (sock == -1 && errno == EINTR);
 328
 329         if (sock == -1)
 330                 return;
 331
 332         DEBUG(6,("accepted socket %d\n", sock));
 333
 334         /* Create new connection structure */
 335
 336         if ((state = (struct winbindd_cli_state *)
 337              malloc(sizeof(*state))) == NULL)
 338                 return;
 339
 340         ZERO_STRUCTP(state);
 341         state->sock = sock;
 342
 343         /* Add to connection list */
 344
 345         winbindd_add_client(state);
 346 }
 347
 348 /* Remove a client connection from client connection list */
 349
 350 static void remove_client(struct winbindd_cli_state *state)
 351 {
 352         /* It's a dead client - hold a funeral */
 353
 354         if (state != NULL) {
 355
 356                 /* Close socket */
 357
 358                 close(state->sock);
 359
 360                 /* Free any getent state */
 361
 362                 free_getent_state(state->getpwent_state);
 363                 free_getent_state(state->getgrent_state);
 364
 365                 /* We may have some extra data that was not freed if the
 366                    client was killed unexpectedly */
 367
 368                 SAFE_FREE(state->response.extra_data);
 369
 370                 /* Remove from list and free */
 371
 372                 winbindd_remove_client(state);
 373                 SAFE_FREE(state);
 374         }
 375 }
 376
 377
 378 /* Process a complete received packet from a client */
 379
 380 void winbind_process_packet(struct winbindd_cli_state *state)
 381 {
 382         /* Process request */
 383
 384         /* Ensure null termination of entire request */
 385         state->request.null_term = '\0';
 386
 387         state->pid = state->request.pid;
 388
 389         process_request(state);
 390
 391         /* Update client state */
 392
 393         state->read_buf_len = 0;
 394         state->write_buf_len = sizeof(struct winbindd_response);
 395
 396         /* we might need to send it to the dual daemon */
 397         if (opt_dual_daemon) {
 398                 dual_send_request(state);
 399         }
 400 }
 401
 402 /* Read some data from a client connection */
 403
 404 void winbind_client_read(struct winbindd_cli_state *state)
 405 {
 406         int n;
 407
 408         /* Read data */
 409
 410         n = sys_read(state->sock, state->read_buf_len +
 411                  (char *)&state->request,
 412                  sizeof(state->request) - state->read_buf_len);
 413
 414         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 415
 416         /* Read failed, kill client */
 417
 418         if (n == -1 || n == 0) {
 419                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 420                          state->sock, state->pid,
 421                          (n == -1) ? strerror(errno) : "EOF"));
 422
 423                 state->finished = True;
 424                 return;
 425         }
 426
 427         /* Update client state */
 428
 429         state->read_buf_len += n;
 430 }
 431
 432 /* Write some data to a client connection */
 433
 434 static void client_write(struct winbindd_cli_state *state)
 435 {
 436         char *data;
 437         int num_written;
 438
 439         /* Write some data */
 440
 441         if (!state->write_extra_data) {
 442
 443                 /* Write response structure */
 444
 445                 data = (char *)&state->response + sizeof(state->response) -
 446                         state->write_buf_len;
 447
 448         } else {
 449
 450                 /* Write extra data */
 451
 452                 data = (char *)state->response.extra_data +
 453                         state->response.length -
 454                         sizeof(struct winbindd_response) -
 455                         state->write_buf_len;
 456         }
 457
 458         num_written = sys_write(state->sock, data, state->write_buf_len);
 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(void)
 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, listen_sock, selret;
 524                 struct timeval timeout;
 525
 526                 /* Handle messages */
 527
 528                 message_dispatch();
 529
 530                 /* rescan the trusted domains list. This must be done
 531                    regularly to cope with transitive trusts */
 532                 rescan_trusted_domains();
 533
 534                 /* Free up temporary memory */
 535
 536                 lp_talloc_free();
 537                 main_loop_talloc_free();
 538
 539                 /* Initialise fd lists for select() */
 540
 541                 listen_sock = open_winbindd_socket();
 542
 543                 if (listen_sock == -1) {
 544                         perror("open_winbind_socket");
 545                         exit(1);
 546                 }
 547
 548                 maxfd = listen_sock;
 549
 550                 FD_ZERO(&r_fds);
 551                 FD_ZERO(&w_fds);
 552                 FD_SET(listen_sock, &r_fds);
 553
 554                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 555                 timeout.tv_usec = 0;
 556
 557                 if (opt_dual_daemon) {
 558                         maxfd = dual_select_setup(&w_fds, maxfd);
 559                 }
 560
 561                 /* Set up client readers and writers */
 562
 563                 state = winbindd_client_list();
 564
 565                 while (state) {
 566
 567                         /* Dispose of client connection if it is marked as
 568                            finished */
 569
 570                         if (state->finished) {
 571                                 struct winbindd_cli_state *next = state->next;
 572
 573                                 remove_client(state);
 574                                 state = next;
 575                                 continue;
 576                         }
 577
 578                         /* Select requires we know the highest fd used */
 579
 580                         if (state->sock > maxfd)
 581                                 maxfd = state->sock;
 582
 583                         /* Add fd for reading */
 584
 585                         if (state->read_buf_len != sizeof(state->request))
 586                                 FD_SET(state->sock, &r_fds);
 587
 588                         /* Add fd for writing */
 589
 590                         if (state->write_buf_len)
 591                                 FD_SET(state->sock, &w_fds);
 592
 593                         state = state->next;
 594                 }
 595
 596                 /* Call select */
 597
 598                 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 599
 600                 if (selret == 0)
 601                         continue;
 602
 603                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 604
 605                         /* Select error, something is badly wrong */
 606
 607                         perror("select");
 608                         exit(1);
 609                 }
 610
 611                 /* Create a new connection if accept_sock readable */
 612
 613                 if (selret > 0) {
 614
 615                         if (opt_dual_daemon) {
 616                                 dual_select(&w_fds);
 617                         }
 618
 619                         if (FD_ISSET(listen_sock, &r_fds))
 620                                 new_connection(listen_sock);
 621
 622                         /* Process activity on client connections */
 623
 624                         for (state = winbindd_client_list(); state;
 625                              state = state->next) {
 626
 627                                 /* Data available for reading */
 628
 629                                 if (FD_ISSET(state->sock, &r_fds)) {
 630
 631                                         /* Read data */
 632
 633                                         winbind_client_read(state);
 634
 635                                         /*
 636                                          * If we have the start of a
 637                                          * packet, then check the
 638                                          * length field to make sure
 639                                          * the client's not talking
 640                                          * Mock Swedish.
 641                                          */
 642
 643                                         if (state->read_buf_len >= sizeof(uint32)
 644                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 645                                                 DEBUG(0,("process_loop: Invalid request size from pid %d: %d bytes sent, should be %d\n",
 646                                                                 state->request.pid, *(uint32 *) &state->request, sizeof(state->request)));
 647
 648                                                 remove_client(state);
 649                                                 break;
 650                                         }
 651
 652                                         /* A request packet might be
 653                                            complete */
 654
 655                                         if (state->read_buf_len ==
 656                                             sizeof(state->request)) {
 657                                                 winbind_process_packet(state);
 658                                         }
 659                                 }
 660
 661                                 /* Data available for writing */
 662
 663                                 if (FD_ISSET(state->sock, &w_fds))
 664                                         client_write(state);
 665                         }
 666                 }
 667
 668 #if 0
 669                 winbindd_check_cache_size(time(NULL));
 670 #endif
 671
 672                 /* Check signal handling things */
 673
 674                 if (do_sigterm)
 675                         terminate();
 676
 677                 if (do_sighup) {
 678
 679                         DEBUG(3, ("got SIGHUP\n"));
 680
 681                         /* Flush various caches */
 682
 683                         flush_caches();
 684                         reload_services_file(True);
 685                         do_sighup = False;
 686                 }
 687
 688                 if (do_sigusr2) {
 689                         print_winbindd_status();
 690                         do_sigusr2 = False;
 691                 }
 692         }
 693 }
 694
 695
 696 /*
 697   these are split out from the main winbindd for use by the background daemon
 698  */
 699 BOOL winbind_setup_common(void)
 700 {
 701         load_interfaces();
 702
 703         if (!secrets_init()) {
 704
 705                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
 706                 return False;
 707         }
 708
 709         namecache_enable();     /* Enable netbios namecache */
 710
 711         /* Check winbindd parameters are valid */
 712
 713         ZERO_STRUCT(server_state);
 714
 715         if (!winbindd_param_init())
 716                 return False;
 717
 718         /* Winbind daemon initialisation */
 719
 720         if (!winbindd_idmap_init())
 721                 return False;
 722
 723         /* Unblock all signals we are interested in as they may have been
 724            blocked by the parent process. */
 725
 726         BlockSignals(False, SIGINT);
 727         BlockSignals(False, SIGQUIT);
 728         BlockSignals(False, SIGTERM);
 729         BlockSignals(False, SIGUSR1);
 730         BlockSignals(False, SIGUSR2);
 731         BlockSignals(False, SIGHUP);
 732
 733         /* Setup signal handlers */
 734
 735         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 736         CatchSignal(SIGQUIT, termination_handler);
 737         CatchSignal(SIGTERM, termination_handler);
 738
 739         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 740
 741         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 742         CatchSignal(SIGHUP, sighup_handler);
 743
 744         return True;
 745 }
 746
 747
 748 /* Main function */
 749
 750 struct winbindd_state server_state;   /* Server state information */
 751
 752
 753 static void usage(void)
 754 {
 755         printf("Usage: winbindd [options]\n");
 756         printf("\t-F                daemon in foreground mode\n");
 757         printf("\t-S                log to stdout\n");
 758         printf("\t-i                interactive mode\n");
 759         printf("\t-B                dual daemon mode\n");
 760         printf("\t-n                disable cacheing\n");
 761         printf("\t-d level          set debug level\n");
 762         printf("\t-s configfile     choose smb.conf location\n");
 763         printf("\t-h                show this help message\n");
 764 }
 765
 766  int main(int argc, char **argv)
 767 {
 768         extern BOOL AllowDebugChange;
 769         pstring logfile;
 770         BOOL interactive = False;
 771         BOOL Fork = True;
 772         BOOL log_stdout = False;
 773         int opt;
 774
 775         /* glibc (?) likes to print "User defined signal 1" and exit if a
 776            SIGUSR[12] is received before a handler is installed */
 777
 778         CatchSignal(SIGUSR1, SIG_IGN);
 779         CatchSignal(SIGUSR2, SIG_IGN);
 780
 781         fault_setup((void (*)(void *))fault_quit );
 782
 783         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 784         lp_set_logfile(logfile);
 785
 786         /* Initialise for running in non-root mode */
 787
 788         sec_init();
 789
 790         /* Set environment variable so we don't recursively call ourselves.
 791            This may also be useful interactively. */
 792
 793         SETENV(WINBINDD_DONT_ENV, "1", 1);
 794
 795         /* Initialise samba/rpc client stuff */
 796
 797         while ((opt = getopt(argc, argv, "FSid:s:nhB")) != EOF) {
 798                 switch (opt) {
 799
 800                 case 'F':
 801                         Fork = False;
 802                         break;
 803                 case 'S':
 804                         log_stdout = True;
 805                         break;
 806                         /* Don't become a daemon */
 807                 case 'i':
 808                         interactive = True;
 809                         log_stdout = True;
 810                         Fork = False;
 811                         break;
 812
 813                         /* dual daemon system */
 814                 case 'B':
 815                         opt_dual_daemon = True;
 816                         break;
 817
 818                         /* disable cacheing */
 819                 case 'n':
 820                         opt_nocache = True;
 821                         break;
 822
 823                         /* Run with specified debug level */
 824                 case 'd':
 825                         DEBUGLEVEL = atoi(optarg);
 826                         AllowDebugChange = False;
 827                         break;
 828
 829                         /* Load a different smb.conf file */
 830                 case 's':
 831                         pstrcpy(dyn_CONFIGFILE,optarg);
 832                         break;
 833
 834                 case 'h':
 835                         usage();
 836                         exit(0);
 837
 838                 default:
 839                         printf("Unknown option %c\n", (char)opt);
 840                         exit(1);
 841                 }
 842         }
 843
 844         if (log_stdout && Fork) {
 845                 printf("Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n");
 846                 usage();
 847                 exit(1);
 848         }
 849
 850         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 851         lp_set_logfile(logfile);
 852         setup_logging("winbindd", log_stdout);
 853         reopen_logs();
 854
 855         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 856         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
 857
 858         if (!reload_services_file(False)) {
 859                 DEBUG(0, ("error opening config file\n"));
 860                 exit(1);
 861         }
 862
 863         /* Setup names. */
 864
 865         if (!init_names())
 866                 exit(1);
 867
 868         if (!interactive) {
 869                 become_daemon(Fork);
 870                 pidfile_create("winbindd");
 871         }
 872
 873
 874 #if HAVE_SETPGID
 875         /*
 876          * If we're interactive we want to set our own process group for
 877          * signal management.
 878          */
 879         if (interactive)
 880                 setpgid( (pid_t)0, (pid_t)0);
 881 #endif
 882
 883         if (!winbind_setup_common()) {
 884                 return 1;
 885         }
 886
 887         if (opt_dual_daemon) {
 888                 do_dual_daemon();
 889         }
 890
 891         /* Initialise messaging system */
 892
 893         if (!message_init()) {
 894                 DEBUG(0, ("unable to initialise messaging system\n"));
 895                 exit(1);
 896         }
 897
 898         register_msg_pool_usage();
 899         message_register(MSG_REQ_TALLOC_USAGE, return_all_talloc_info);
 900
 901         /* Loop waiting for requests */
 902
 903         process_loop();
 904
 905         trustdom_cache_shutdown();
 906         uni_group_cache_shutdown();
 907         return 0;
 908 }