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    Copyright (C) Jelmer Vernooij 2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "winbindd.h"
  26
  27 BOOL opt_nocache = False;
  28 BOOL opt_dual_daemon = False;
  29
  30 /* Reload configuration */
  31
  32 static BOOL reload_services_file(BOOL test)
  33 {
  34         BOOL ret;
  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         reopen_logs();
  47         ret = lp_load(dyn_CONFIGFILE,False,False,True);
  48
  49         reopen_logs();
  50         load_interfaces();
  51
  52         return(ret);
  53 }
  54
  55 #if DUMP_CORE
  56
  57 /**************************************************************************** **
  58  Prepare to dump a core file - carefully!
  59  **************************************************************************** */
  60
  61 static BOOL dump_core(void)
  62 {
  63         char *p;
  64         pstring dname;
  65         pstrcpy( dname, lp_logfile() );
  66         if ((p=strrchr(dname,'/')))
  67                 *p=0;
  68         pstrcat( dname, "/corefiles" );
  69         mkdir( dname, 0700 );
  70         sys_chown( dname, getuid(), getgid() );
  71         chmod( dname, 0700 );
  72         if ( chdir(dname) )
  73                 return( False );
  74         umask( ~(0700) );
  75
  76 #ifdef HAVE_GETRLIMIT
  77 #ifdef RLIMIT_CORE
  78         {
  79                 struct rlimit rlp;
  80                 getrlimit( RLIMIT_CORE, &rlp );
  81                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
  82                 setrlimit( RLIMIT_CORE, &rlp );
  83                 getrlimit( RLIMIT_CORE, &rlp );
  84                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
  85         }
  86 #endif
  87 #endif
  88
  89         DEBUG(0,("Dumping core in %s\n",dname));
  90         abort();
  91         return( True );
  92 } /* dump_core */
  93 #endif
  94
  95 /**************************************************************************** **
  96  Handle a fault..
  97  **************************************************************************** */
  98
  99 static void fault_quit(void)
 100 {
 101 #if DUMP_CORE
 102         dump_core();
 103 #endif
 104 }
 105
 106 static void winbindd_status(void)
 107 {
 108         struct winbindd_cli_state *tmp;
 109
 110         DEBUG(0, ("winbindd status:\n"));
 111
 112         /* Print client state information */
 113
 114         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 115
 116         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 117                 DEBUG(2, ("\tclient list:\n"));
 118                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 119                         DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
 120                                   tmp->pid, tmp->sock, tmp->read_buf_len,
 121                                   tmp->write_buf_len));
 122                 }
 123         }
 124 }
 125
 126 /* Print winbindd status to log file */
 127
 128 static void print_winbindd_status(void)
 129 {
 130         winbindd_status();
 131         winbindd_cm_status();
 132 }
 133
 134 /* Flush client cache */
 135
 136 static void flush_caches(void)
 137 {
 138         /* Clear cached user and group enumation info */
 139         wcache_flush_cache();
 140 }
 141
 142 /* Handle the signal by unlinking socket and exiting */
 143
 144 static void terminate(void)
 145 {
 146         pstring path;
 147
 148         idmap_close();
 149
 150         /* Remove socket file */
 151         snprintf(path, sizeof(path), "%s/%s",
 152                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 153         unlink(path);
 154         exit(0);
 155 }
 156
 157 static BOOL do_sigterm;
 158
 159 static void termination_handler(int signum)
 160 {
 161         do_sigterm = True;
 162         sys_select_signal();
 163 }
 164
 165 static BOOL do_sigusr2;
 166
 167 static void sigusr2_handler(int signum)
 168 {
 169         do_sigusr2 = True;
 170         sys_select_signal();
 171 }
 172
 173 static BOOL do_sighup;
 174
 175 static void sighup_handler(int signum)
 176 {
 177         do_sighup = True;
 178         sys_select_signal();
 179 }
 180
 181 struct dispatch_table {
 182         enum winbindd_cmd cmd;
 183         enum winbindd_result (*fn)(struct winbindd_cli_state *state);
 184         const char *winbindd_cmd_name;
 185 };
 186
 187 static struct dispatch_table dispatch_table[] = {
 188
 189         /* User functions */
 190
 191         { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
 192         { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
 193
 194         { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
 195         { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
 196         { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
 197
 198         { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
 199
 200         /* Group functions */
 201
 202         { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
 203         { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
 204         { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
 205         { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
 206         { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
 207         { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
 208
 209         /* PAM auth functions */
 210
 211         { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
 212         { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
 213         { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
 214
 215         /* Enumeration functions */
 216
 217         { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
 218         { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
 219         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
 220         { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
 221
 222         /* SID related functions */
 223
 224         { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
 225         { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
 226
 227         /* Lookup related functions */
 228
 229         { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
 230         { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
 231         { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
 232         { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
 233
 234         /* Miscellaneous */
 235
 236         { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
 237         { WINBINDD_PING, winbindd_ping, "PING" },
 238         { WINBINDD_INFO, winbindd_info, "INFO" },
 239         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
 240         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 241         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 242         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir, "WINBINDD_PRIV_PIPE_DIR" },
 243
 244         /* WINS functions */
 245
 246         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 247         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 248
 249         /* End of list */
 250
 251         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 252 };
 253
 254 static void process_request(struct winbindd_cli_state *state)
 255 {
 256         struct dispatch_table *table = dispatch_table;
 257
 258         /* Free response data - we may be interrupted and receive another
 259            command before being able to send this data off. */
 260
 261         SAFE_FREE(state->response.extra_data);
 262
 263         ZERO_STRUCT(state->response);
 264
 265         state->response.result = WINBINDD_ERROR;
 266         state->response.length = sizeof(struct winbindd_response);
 267
 268         /* Process command */
 269
 270         for (table = dispatch_table; table->fn; table++) {
 271                 if (state->request.cmd == table->cmd) {
 272                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 273                         state->response.result = table->fn(state);
 274                         break;
 275                 }
 276         }
 277
 278         if (!table->fn)
 279                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 280
 281         /* In case extra data pointer is NULL */
 282
 283         if (!state->response.extra_data)
 284                 state->response.length = sizeof(struct winbindd_response);
 285 }
 286
 287 /* Process a new connection by adding it to the client connection list */
 288
 289 static void new_connection(int listen_sock, BOOL privileged)
 290 {
 291         struct sockaddr_un sunaddr;
 292         struct winbindd_cli_state *state;
 293         socklen_t len;
 294         int sock;
 295
 296         /* Accept connection */
 297
 298         len = sizeof(sunaddr);
 299
 300         do {
 301                 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
 302         } while (sock == -1 && errno == EINTR);
 303
 304         if (sock == -1)
 305                 return;
 306
 307         DEBUG(6,("accepted socket %d\n", sock));
 308
 309         /* Create new connection structure */
 310
 311         if ((state = (struct winbindd_cli_state *)
 312              malloc(sizeof(*state))) == NULL)
 313                 return;
 314
 315         ZERO_STRUCTP(state);
 316         state->sock = sock;
 317
 318         state->last_access = time(NULL);
 319
 320         state->privileged = privileged;
 321
 322         /* Add to connection list */
 323
 324         winbindd_add_client(state);
 325 }
 326
 327 /* Remove a client connection from client connection list */
 328
 329 static void remove_client(struct winbindd_cli_state *state)
 330 {
 331         /* It's a dead client - hold a funeral */
 332
 333         if (state != NULL) {
 334
 335                 /* Close socket */
 336
 337                 close(state->sock);
 338
 339                 /* Free any getent state */
 340
 341                 free_getent_state(state->getpwent_state);
 342                 free_getent_state(state->getgrent_state);
 343
 344                 /* We may have some extra data that was not freed if the
 345                    client was killed unexpectedly */
 346
 347                 SAFE_FREE(state->response.extra_data);
 348
 349                 /* Remove from list and free */
 350
 351                 winbindd_remove_client(state);
 352                 SAFE_FREE(state);
 353         }
 354 }
 355
 356
 357 /* Shutdown client connection which has been idle for the longest time */
 358
 359 static BOOL remove_idle_client(void)
 360 {
 361         struct winbindd_cli_state *state, *remove_state = NULL;
 362         time_t last_access = 0;
 363         int nidle = 0;
 364
 365         for (state = winbindd_client_list(); state; state = state->next) {
 366                 if (state->read_buf_len == 0 && state->write_buf_len == 0 &&
 367                                 !state->getpwent_state && !state->getgrent_state) {
 368                         nidle++;
 369                         if (!last_access || state->last_access < last_access) {
 370                                 last_access = state->last_access;
 371                                 remove_state = state;
 372                         }
 373                 }
 374         }
 375
 376         if (remove_state) {
 377                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 378                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 379                 remove_client(remove_state);
 380                 return True;
 381         }
 382
 383         return False;
 384 }
 385
 386 /* Process a complete received packet from a client */
 387
 388 void winbind_process_packet(struct winbindd_cli_state *state)
 389 {
 390         /* Process request */
 391
 392         /* Ensure null termination of entire request */
 393         state->request.null_term = '\0';
 394
 395         state->pid = state->request.pid;
 396
 397         process_request(state);
 398
 399         /* Update client state */
 400
 401         state->read_buf_len = 0;
 402         state->write_buf_len = sizeof(struct winbindd_response);
 403
 404         /* we might need to send it to the dual daemon */
 405         if (opt_dual_daemon) {
 406                 dual_send_request(state);
 407         }
 408 }
 409
 410 /* Read some data from a client connection */
 411
 412 void winbind_client_read(struct winbindd_cli_state *state)
 413 {
 414         int n;
 415
 416         /* Read data */
 417
 418         n = sys_read(state->sock, state->read_buf_len +
 419                  (char *)&state->request,
 420                  sizeof(state->request) - state->read_buf_len);
 421
 422         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 423
 424         /* Read failed, kill client */
 425
 426         if (n == -1 || n == 0) {
 427                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 428                          state->sock, state->pid,
 429                          (n == -1) ? strerror(errno) : "EOF"));
 430
 431                 state->finished = True;
 432                 return;
 433         }
 434
 435         /* Update client state */
 436
 437         state->read_buf_len += n;
 438         state->last_access = time(NULL);
 439 }
 440
 441 /* Write some data to a client connection */
 442
 443 static void client_write(struct winbindd_cli_state *state)
 444 {
 445         char *data;
 446         int num_written;
 447
 448         /* Write some data */
 449
 450         if (!state->write_extra_data) {
 451
 452                 /* Write response structure */
 453
 454                 data = (char *)&state->response + sizeof(state->response) -
 455                         state->write_buf_len;
 456
 457         } else {
 458
 459                 /* Write extra data */
 460
 461                 data = (char *)state->response.extra_data +
 462                         state->response.length -
 463                         sizeof(struct winbindd_response) -
 464                         state->write_buf_len;
 465         }
 466
 467         num_written = sys_write(state->sock, data, state->write_buf_len);
 468
 469         DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
 470
 471         /* Write failed, kill cilent */
 472
 473         if (num_written == -1 || num_written == 0) {
 474
 475                 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
 476                          state->sock, state->pid,
 477                          (num_written == -1) ? strerror(errno) : "EOF"));
 478
 479                 state->finished = True;
 480
 481                 SAFE_FREE(state->response.extra_data);
 482
 483                 return;
 484         }
 485
 486         /* Update client state */
 487
 488         state->write_buf_len -= num_written;
 489         state->last_access = time(NULL);
 490
 491         /* Have we written all data? */
 492
 493         if (state->write_buf_len == 0) {
 494
 495                 /* Take care of extra data */
 496
 497                 if (state->write_extra_data) {
 498
 499                         SAFE_FREE(state->response.extra_data);
 500
 501                         state->write_extra_data = False;
 502
 503                         DEBUG(10,("client_write: client_write: complete response written.\n"));
 504
 505                 } else if (state->response.length >
 506                            sizeof(struct winbindd_response)) {
 507
 508                         /* Start writing extra data */
 509
 510                         state->write_buf_len =
 511                                 state->response.length -
 512                                 sizeof(struct winbindd_response);
 513
 514                         DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
 515
 516                         state->write_extra_data = True;
 517                 }
 518         }
 519 }
 520
 521 /* Process incoming clients on listen_sock.  We use a tricky non-blocking,
 522    non-forking, non-threaded model which allows us to handle many
 523    simultaneous connections while remaining impervious to many denial of
 524    service attacks. */
 525
 526 static void process_loop(void)
 527 {
 528         /* We'll be doing this a lot */
 529
 530         while (1) {
 531                 struct winbindd_cli_state *state;
 532                 fd_set r_fds, w_fds;
 533                 int maxfd, listen_sock, listen_priv_sock, selret;
 534                 struct timeval timeout;
 535
 536                 /* Handle messages */
 537
 538                 message_dispatch();
 539
 540                 /* rescan the trusted domains list. This must be done
 541                    regularly to cope with transitive trusts */
 542                 rescan_trusted_domains(False);
 543
 544                 /* Free up temporary memory */
 545
 546                 lp_talloc_free();
 547                 main_loop_talloc_free();
 548
 549                 /* Initialise fd lists for select() */
 550
 551                 listen_sock = open_winbindd_socket();
 552                 listen_priv_sock = open_winbindd_priv_socket();
 553
 554                 if (listen_sock == -1 || listen_priv_sock == -1) {
 555                         perror("open_winbind_socket");
 556                         exit(1);
 557                 }
 558
 559                 maxfd = MAX(listen_sock, listen_priv_sock);
 560
 561                 FD_ZERO(&r_fds);
 562                 FD_ZERO(&w_fds);
 563                 FD_SET(listen_sock, &r_fds);
 564                 FD_SET(listen_priv_sock, &r_fds);
 565
 566                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 567                 timeout.tv_usec = 0;
 568
 569                 if (opt_dual_daemon) {
 570                         maxfd = dual_select_setup(&w_fds, maxfd);
 571                 }
 572
 573                 /* Set up client readers and writers */
 574
 575                 state = winbindd_client_list();
 576
 577                 while (state) {
 578
 579                         /* Dispose of client connection if it is marked as
 580                            finished */
 581
 582                         if (state->finished) {
 583                                 struct winbindd_cli_state *next = state->next;
 584
 585                                 remove_client(state);
 586                                 state = next;
 587                                 continue;
 588                         }
 589
 590                         /* Select requires we know the highest fd used */
 591
 592                         if (state->sock > maxfd)
 593                                 maxfd = state->sock;
 594
 595                         /* Add fd for reading */
 596
 597                         if (state->read_buf_len != sizeof(state->request))
 598                                 FD_SET(state->sock, &r_fds);
 599
 600                         /* Add fd for writing */
 601
 602                         if (state->write_buf_len)
 603                                 FD_SET(state->sock, &w_fds);
 604
 605                         state = state->next;
 606                 }
 607
 608                 /* Call select */
 609
 610                 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 611
 612                 if (selret == 0)
 613                         continue;
 614
 615                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 616
 617                         /* Select error, something is badly wrong */
 618
 619                         perror("select");
 620                         exit(1);
 621                 }
 622
 623                 /* Create a new connection if listen_sock readable */
 624
 625                 if (selret > 0) {
 626
 627                         if (opt_dual_daemon) {
 628                                 dual_select(&w_fds);
 629                         }
 630
 631                         if (FD_ISSET(listen_sock, &r_fds)) {
 632                                 while (winbindd_num_clients() > WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
 633                                         DEBUG(5,("winbindd: Exceeding %d client connections, removing idle connection.\n",
 634                                                 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
 635                                         if (!remove_idle_client()) {
 636                                                 DEBUG(0,("winbindd: Exceeding %d client connections, no idle connection found\n",
 637                                                         WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
 638                                                 break;
 639                                         }
 640                                 }
 641                                 /* new, non-privileged connection */
 642                                 new_connection(listen_sock, False);
 643                         }
 644
 645                         if (FD_ISSET(listen_priv_sock, &r_fds)) {
 646                                 while (winbindd_num_clients() > WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
 647                                         DEBUG(5,("winbindd: Exceeding %d client connections, removing idle connection.\n",
 648                                                 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
 649                                         if (!remove_idle_client()) {
 650                                                 DEBUG(0,("winbindd: Exceeding %d client connections, no idle connection found\n",
 651                                                         WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
 652                                                 break;
 653                                         }
 654                                 }
 655                                 /* new, privileged connection */
 656                                 new_connection(listen_priv_sock, True);
 657                         }
 658
 659                         /* Process activity on client connections */
 660
 661                         for (state = winbindd_client_list(); state;
 662                              state = state->next) {
 663
 664                                 /* Data available for reading */
 665
 666                                 if (FD_ISSET(state->sock, &r_fds)) {
 667
 668                                         /* Read data */
 669
 670                                         winbind_client_read(state);
 671
 672                                         /*
 673                                          * If we have the start of a
 674                                          * packet, then check the
 675                                          * length field to make sure
 676                                          * the client's not talking
 677                                          * Mock Swedish.
 678                                          */
 679
 680                                         if (state->read_buf_len >= sizeof(uint32)
 681                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 682                                                 DEBUG(0,("process_loop: Invalid request size from pid %d: %d bytes sent, should be %d\n",
 683                                                                 state->request.pid, *(uint32 *) &state->request, sizeof(state->request)));
 684
 685                                                 remove_client(state);
 686                                                 break;
 687                                         }
 688
 689                                         /* A request packet might be
 690                                            complete */
 691
 692                                         if (state->read_buf_len ==
 693                                             sizeof(state->request)) {
 694                                                 winbind_process_packet(state);
 695                                         }
 696                                 }
 697
 698                                 /* Data available for writing */
 699
 700                                 if (FD_ISSET(state->sock, &w_fds))
 701                                         client_write(state);
 702                         }
 703                 }
 704
 705 #if 0
 706                 winbindd_check_cache_size(time(NULL));
 707 #endif
 708
 709                 /* Check signal handling things */
 710
 711                 if (do_sigterm)
 712                         terminate();
 713
 714                 if (do_sighup) {
 715
 716                         DEBUG(3, ("got SIGHUP\n"));
 717
 718                         /* Flush various caches */
 719
 720                         flush_caches();
 721                         reload_services_file(True);
 722                         do_sighup = False;
 723                 }
 724
 725                 if (do_sigusr2) {
 726                         print_winbindd_status();
 727                         do_sigusr2 = False;
 728                 }
 729         }
 730 }
 731
 732 /* Main function */
 733
 734 struct winbindd_state server_state;   /* Server state information */
 735
 736 int main(int argc, char **argv)
 737 {
 738         pstring logfile;
 739         static BOOL interactive = False;
 740         static BOOL Fork = True;
 741         static BOOL log_stdout = False;
 742         struct poptOption long_options[] = {
 743                 POPT_AUTOHELP
 744                 { "stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 745                 { "foreground", 'F', POPT_ARG_VAL, &Fork, False, "Daemon in foreground mode" },
 746                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
 747                 { "dual-daemon", 'B', POPT_ARG_VAL, &opt_dual_daemon, True, "Dual daemon mode" },
 748                 { "no-caching", 'n', POPT_ARG_VAL, &opt_nocache, False, "Disable caching" },
 749                 POPT_COMMON_SAMBA
 750                 POPT_TABLEEND
 751         };
 752         poptContext pc;
 753         int opt;
 754
 755         /* glibc (?) likes to print "User defined signal 1" and exit if a
 756            SIGUSR[12] is received before a handler is installed */
 757
 758         CatchSignal(SIGUSR1, SIG_IGN);
 759         CatchSignal(SIGUSR2, SIG_IGN);
 760
 761         fault_setup((void (*)(void *))fault_quit );
 762
 763         /* Initialise for running in non-root mode */
 764
 765         sec_init();
 766
 767         set_remote_machine_name("winbindd", False);
 768
 769         /* Set environment variable so we don't recursively call ourselves.
 770            This may also be useful interactively. */
 771
 772         setenv(WINBINDD_DONT_ENV, "1", 1);
 773
 774         /* Initialise samba/rpc client stuff */
 775
 776         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options,
 777                                                 POPT_CONTEXT_KEEP_FIRST);
 778
 779         while ((opt = poptGetNextOpt(pc)) != -1) {
 780                 switch (opt) {
 781                         /* Don't become a daemon */
 782                 case 'i':
 783                         interactive = True;
 784                         log_stdout = True;
 785                         Fork = False;
 786                         break;
 787                 }
 788         }
 789
 790
 791         if (log_stdout && Fork) {
 792                 printf("Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n");
 793                 poptPrintUsage(pc, stderr, 0);
 794                 exit(1);
 795         }
 796
 797         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 798         lp_set_logfile(logfile);
 799         setup_logging("winbindd", log_stdout);
 800         reopen_logs();
 801
 802         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 803         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2003\n" ) );
 804
 805         if (!reload_services_file(False)) {
 806                 DEBUG(0, ("error opening config file\n"));
 807                 exit(1);
 808         }
 809
 810         /* Setup names. */
 811
 812         if (!init_names())
 813                 exit(1);
 814
 815         load_interfaces();
 816
 817         if (!secrets_init()) {
 818
 819                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
 820                 return False;
 821         }
 822
 823         /* Enable netbios namecache */
 824
 825         namecache_enable();
 826
 827         /* Check winbindd parameters are valid */
 828
 829         ZERO_STRUCT(server_state);
 830
 831         if (!winbindd_param_init())
 832                 return 1;
 833
 834         /* Winbind daemon initialisation */
 835
 836         if (!idmap_init())
 837                 return 1;
 838
 839         if (!idmap_init_wellknown_sids())
 840                 exit(1);
 841
 842         /* Unblock all signals we are interested in as they may have been
 843            blocked by the parent process. */
 844
 845         BlockSignals(False, SIGINT);
 846         BlockSignals(False, SIGQUIT);
 847         BlockSignals(False, SIGTERM);
 848         BlockSignals(False, SIGUSR1);
 849         BlockSignals(False, SIGUSR2);
 850         BlockSignals(False, SIGHUP);
 851
 852         /* Setup signal handlers */
 853
 854         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 855         CatchSignal(SIGQUIT, termination_handler);
 856         CatchSignal(SIGTERM, termination_handler);
 857
 858         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 859
 860         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 861         CatchSignal(SIGHUP, sighup_handler);
 862
 863         if (!interactive)
 864                 become_daemon(Fork);
 865
 866         pidfile_create("winbindd");
 867
 868 #if HAVE_SETPGID
 869         /*
 870          * If we're interactive we want to set our own process group for
 871          * signal management.
 872          */
 873         if (interactive)
 874                 setpgid( (pid_t)0, (pid_t)0);
 875 #endif
 876
 877         if (opt_dual_daemon) {
 878                 do_dual_daemon();
 879         }
 880
 881         /* Initialise messaging system */
 882
 883         if (!message_init()) {
 884                 DEBUG(0, ("unable to initialise messaging system\n"));
 885                 exit(1);
 886         }
 887         poptFreeContext(pc);
 888
 889         /* Loop waiting for requests */
 890
 891         process_loop();
 892
 893         trustdom_cache_shutdown();
 894         uni_group_cache_shutdown();
 895
 896         return 0;
 897 }