source3/nsswitch/winbindd.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4
   5    Winbind daemon for ntdom nss module
   6
   7    Copyright (C) by Tim Potter 2000, 2001
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "winbindd.h"
  25
  26 /* List of all connected clients */
  27
  28 struct winbindd_cli_state *client_list;
  29 static int num_clients;
  30 BOOL opt_nocache;
  31
  32 /* Reload configuration */
  33
  34 static BOOL reload_services_file(BOOL test)
  35 {
  36         BOOL ret;
  37         pstring logfile;
  38
  39         if (lp_loaded()) {
  40                 pstring fname;
  41
  42                 pstrcpy(fname,lp_configfile());
  43                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
  44                         pstrcpy(dyn_CONFIGFILE,fname);
  45                         test = False;
  46                 }
  47         }
  48
  49         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  50         lp_set_logfile(logfile);
  51
  52         reopen_logs();
  53         ret = lp_load(dyn_CONFIGFILE,False,False,True);
  54
  55         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
  56         lp_set_logfile(logfile);
  57
  58         reopen_logs();
  59         load_interfaces();
  60
  61         return(ret);
  62 }
  63
  64 #if DUMP_CORE
  65
  66 /**************************************************************************** **
  67  Prepare to dump a core file - carefully!
  68  **************************************************************************** */
  69
  70 static BOOL dump_core(void)
  71 {
  72         char *p;
  73         pstring dname;
  74         pstrcpy( dname, lp_logfile() );
  75         if ((p=strrchr(dname,'/')))
  76                 *p=0;
  77         pstrcat( dname, "/corefiles" );
  78         mkdir( dname, 0700 );
  79         sys_chown( dname, getuid(), getgid() );
  80         chmod( dname, 0700 );
  81         if ( chdir(dname) )
  82                 return( False );
  83         umask( ~(0700) );
  84
  85 #ifdef HAVE_GETRLIMIT
  86 #ifdef RLIMIT_CORE
  87         {
  88                 struct rlimit rlp;
  89                 getrlimit( RLIMIT_CORE, &rlp );
  90                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
  91                 setrlimit( RLIMIT_CORE, &rlp );
  92                 getrlimit( RLIMIT_CORE, &rlp );
  93                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
  94         }
  95 #endif
  96 #endif
  97
  98         DEBUG(0,("Dumping core in %s\n",dname));
  99         abort();
 100         return( True );
 101 } /* dump_core */
 102 #endif
 103
 104 /**************************************************************************** **
 105  Handle a fault..
 106  **************************************************************************** */
 107
 108 static void fault_quit(void)
 109 {
 110 #if DUMP_CORE
 111         dump_core();
 112 #endif
 113 }
 114
 115 static void winbindd_status(void)
 116 {
 117         struct winbindd_cli_state *tmp;
 118
 119         DEBUG(0, ("winbindd status:\n"));
 120
 121         /* Print client state information */
 122
 123         DEBUG(0, ("\t%d clients currently active\n", num_clients));
 124
 125         if (DEBUGLEVEL >= 2 && num_clients) {
 126                 DEBUG(2, ("\tclient list:\n"));
 127                 for(tmp = client_list; tmp; tmp = tmp->next) {
 128                         DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
 129                                   tmp->pid, tmp->sock, tmp->read_buf_len,
 130                                   tmp->write_buf_len));
 131                 }
 132         }
 133 }
 134
 135 /* Print winbindd status to log file */
 136
 137 static void print_winbindd_status(void)
 138 {
 139         winbindd_status();
 140         winbindd_idmap_status();
 141         winbindd_cm_status();
 142 }
 143
 144 /* Flush client cache */
 145
 146 static void flush_caches(void)
 147 {
 148         /* Clear cached user and group enumation info */
 149         wcache_flush_cache();
 150 }
 151
 152 /* Handle the signal by unlinking socket and exiting */
 153
 154 static void terminate(void)
 155 {
 156         pstring path;
 157
 158         /* Remove socket file */
 159         snprintf(path, sizeof(path), "%s/%s",
 160                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 161         unlink(path);
 162         exit(0);
 163 }
 164
 165 static BOOL do_sigterm;
 166
 167 static void termination_handler(int signum)
 168 {
 169         do_sigterm = True;
 170 }
 171
 172 static BOOL do_sigusr2;
 173
 174 static void sigusr2_handler(int signum)
 175 {
 176         do_sigusr2 = True;
 177 }
 178
 179 static BOOL do_sighup;
 180
 181 static void sighup_handler(int signum)
 182 {
 183         do_sighup = True;
 184 }
 185
 186 /* Create winbindd socket */
 187
 188 static int create_sock(void)
 189 {
 190         struct sockaddr_un sunaddr;
 191         struct stat st;
 192         int sock;
 193         mode_t old_umask;
 194         pstring path;
 195
 196         /* Create the socket directory or reuse the existing one */
 197
 198         if (lstat(WINBINDD_SOCKET_DIR, &st) == -1) {
 199
 200                 if (errno == ENOENT) {
 201
 202                         /* Create directory */
 203
 204                         if (mkdir(WINBINDD_SOCKET_DIR, 0755) == -1) {
 205                                 DEBUG(0, ("error creating socket directory "
 206                                           "%s: %s\n", WINBINDD_SOCKET_DIR,
 207                                           strerror(errno)));
 208                                 return -1;
 209                         }
 210
 211                 } else {
 212
 213                         DEBUG(0, ("lstat failed on socket directory %s: %s\n",
 214                                   WINBINDD_SOCKET_DIR, strerror(errno)));
 215                         return -1;
 216                 }
 217
 218         } else {
 219
 220                 /* Check ownership and permission on existing directory */
 221
 222                 if (!S_ISDIR(st.st_mode)) {
 223                         DEBUG(0, ("socket directory %s isn't a directory\n",
 224                                   WINBINDD_SOCKET_DIR));
 225                         return -1;
 226                 }
 227
 228                 if ((st.st_uid != sec_initial_uid()) ||
 229                     ((st.st_mode & 0777) != 0755)) {
 230                         DEBUG(0, ("invalid permissions on socket directory "
 231                                   "%s\n", WINBINDD_SOCKET_DIR));
 232                         return -1;
 233                 }
 234         }
 235
 236         /* Create the socket file */
 237
 238         old_umask = umask(0);
 239
 240         sock = socket(AF_UNIX, SOCK_STREAM, 0);
 241
 242         if (sock == -1) {
 243                 perror("socket");
 244                 return -1;
 245         }
 246
 247         snprintf(path, sizeof(path), "%s/%s",
 248                  WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
 249
 250         unlink(path);
 251         memset(&sunaddr, 0, sizeof(sunaddr));
 252         sunaddr.sun_family = AF_UNIX;
 253         safe_strcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)-1);
 254
 255         if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
 256                 DEBUG(0, ("bind failed on winbind socket %s: %s\n",
 257                           path,
 258                           strerror(errno)));
 259                 close(sock);
 260                 return -1;
 261         }
 262
 263         if (listen(sock, 5) == -1) {
 264                 DEBUG(0, ("listen failed on winbind socket %s: %s\n",
 265                           path,
 266                           strerror(errno)));
 267                 close(sock);
 268                 return -1;
 269         }
 270
 271         umask(old_umask);
 272
 273         /* Success! */
 274
 275         return sock;
 276 }
 277
 278 struct dispatch_table {
 279         enum winbindd_cmd cmd;
 280         enum winbindd_result (*fn)(struct winbindd_cli_state *state);
 281         char *winbindd_cmd_name;
 282 };
 283
 284 static struct dispatch_table dispatch_table[] = {
 285
 286         /* User functions */
 287
 288         { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
 289         { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
 290
 291         { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
 292         { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
 293         { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
 294
 295         { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
 296
 297         /* Group functions */
 298
 299         { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
 300         { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
 301         { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
 302         { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
 303         { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
 304
 305         /* PAM auth functions */
 306
 307         { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
 308         { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
 309         { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
 310
 311         /* Enumeration functions */
 312
 313         { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
 314         { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
 315         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
 316
 317         /* SID related functions */
 318
 319         { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
 320         { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
 321
 322         /* Lookup related functions */
 323
 324         { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
 325         { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
 326         { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
 327         { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
 328
 329         /* Miscellaneous */
 330
 331         { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
 332         { WINBINDD_PING, winbindd_ping, "PING" },
 333         { WINBINDD_INFO, winbindd_info, "INFO" },
 334         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
 335
 336         /* End of list */
 337
 338         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 339 };
 340
 341 static void process_request(struct winbindd_cli_state *state)
 342 {
 343         struct dispatch_table *table = dispatch_table;
 344
 345         /* Free response data - we may be interrupted and receive another
 346            command before being able to send this data off. */
 347
 348         SAFE_FREE(state->response.extra_data);
 349
 350         ZERO_STRUCT(state->response);
 351
 352         state->response.result = WINBINDD_ERROR;
 353         state->response.length = sizeof(struct winbindd_response);
 354
 355         /* Process command */
 356
 357         for (table = dispatch_table; table->fn; table++) {
 358                 if (state->request.cmd == table->cmd) {
 359                         DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
 360                         state->response.result = table->fn(state);
 361                         break;
 362                 }
 363         }
 364
 365         if (!table->fn)
 366                 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
 367
 368         /* In case extra data pointer is NULL */
 369
 370         if (!state->response.extra_data)
 371                 state->response.length = sizeof(struct winbindd_response);
 372 }
 373
 374 /* Process a new connection by adding it to the client connection list */
 375
 376 static void new_connection(int accept_sock)
 377 {
 378         struct sockaddr_un sunaddr;
 379         struct winbindd_cli_state *state;
 380         socklen_t len;
 381         int sock;
 382
 383         /* Accept connection */
 384
 385         len = sizeof(sunaddr);
 386
 387         do {
 388                 sock = accept(accept_sock, (struct sockaddr *)&sunaddr, &len);
 389         } while (sock == -1 && errno == EINTR);
 390
 391         if (sock == -1)
 392                 return;
 393
 394         DEBUG(6,("accepted socket %d\n", sock));
 395
 396         /* Create new connection structure */
 397
 398         if ((state = (struct winbindd_cli_state *)
 399              malloc(sizeof(*state))) == NULL)
 400                 return;
 401
 402         ZERO_STRUCTP(state);
 403         state->sock = sock;
 404
 405         /* Add to connection list */
 406
 407         DLIST_ADD(client_list, state);
 408         num_clients++;
 409 }
 410
 411 /* Remove a client connection from client connection list */
 412
 413 static void remove_client(struct winbindd_cli_state *state)
 414 {
 415         /* It's a dead client - hold a funeral */
 416
 417         if (state != NULL) {
 418
 419                 /* Close socket */
 420
 421                 close(state->sock);
 422
 423                 /* Free any getent state */
 424
 425                 free_getent_state(state->getpwent_state);
 426                 free_getent_state(state->getgrent_state);
 427
 428                 /* We may have some extra data that was not freed if the
 429                    client was killed unexpectedly */
 430
 431                 SAFE_FREE(state->response.extra_data);
 432
 433                 /* Remove from list and free */
 434
 435                 DLIST_REMOVE(client_list, state);
 436                 SAFE_FREE(state);
 437                 num_clients--;
 438         }
 439 }
 440
 441 /* Process a complete received packet from a client */
 442
 443 static void process_packet(struct winbindd_cli_state *state)
 444 {
 445         /* Process request */
 446
 447         state->pid = state->request.pid;
 448
 449         process_request(state);
 450
 451         /* Update client state */
 452
 453         state->read_buf_len = 0;
 454         state->write_buf_len = sizeof(struct winbindd_response);
 455 }
 456
 457 /* Read some data from a client connection */
 458
 459 static void client_read(struct winbindd_cli_state *state)
 460 {
 461         int n;
 462
 463         /* Read data */
 464
 465         do {
 466
 467                 n = read(state->sock, state->read_buf_len +
 468                          (char *)&state->request,
 469                          sizeof(state->request) - state->read_buf_len);
 470
 471         } while (n == -1 && errno == EINTR);
 472
 473         DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
 474
 475         /* Read failed, kill client */
 476
 477         if (n == -1 || n == 0) {
 478                 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
 479                          state->sock, state->pid,
 480                          (n == -1) ? strerror(errno) : "EOF"));
 481
 482                 state->finished = True;
 483                 return;
 484         }
 485
 486         /* Update client state */
 487
 488         state->read_buf_len += n;
 489 }
 490
 491 /* Write some data to a client connection */
 492
 493 static void client_write(struct winbindd_cli_state *state)
 494 {
 495         char *data;
 496         int num_written;
 497
 498         /* Write some data */
 499
 500         if (!state->write_extra_data) {
 501
 502                 /* Write response structure */
 503
 504                 data = (char *)&state->response + sizeof(state->response) -
 505                         state->write_buf_len;
 506
 507         } else {
 508
 509                 /* Write extra data */
 510
 511                 data = (char *)state->response.extra_data +
 512                         state->response.length -
 513                         sizeof(struct winbindd_response) -
 514                         state->write_buf_len;
 515         }
 516
 517         do {
 518                 num_written = write(state->sock, data, state->write_buf_len);
 519         } while (num_written == -1 && errno == EINTR);
 520
 521         DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
 522
 523         /* Write failed, kill cilent */
 524
 525         if (num_written == -1 || num_written == 0) {
 526
 527                 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
 528                          state->sock, state->pid,
 529                          (num_written == -1) ? strerror(errno) : "EOF"));
 530
 531                 state->finished = True;
 532
 533                 SAFE_FREE(state->response.extra_data);
 534
 535                 return;
 536         }
 537
 538         /* Update client state */
 539
 540         state->write_buf_len -= num_written;
 541
 542         /* Have we written all data? */
 543
 544         if (state->write_buf_len == 0) {
 545
 546                 /* Take care of extra data */
 547
 548                 if (state->write_extra_data) {
 549
 550                         SAFE_FREE(state->response.extra_data);
 551
 552                         state->write_extra_data = False;
 553
 554                         DEBUG(10,("client_write: client_write: complete response written.\n"));
 555
 556                 } else if (state->response.length >
 557                            sizeof(struct winbindd_response)) {
 558
 559                         /* Start writing extra data */
 560
 561                         state->write_buf_len =
 562                                 state->response.length -
 563                                 sizeof(struct winbindd_response);
 564
 565                         DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
 566
 567                         state->write_extra_data = True;
 568                 }
 569         }
 570 }
 571
 572 /* Process incoming clients on accept_sock.  We use a tricky non-blocking,
 573    non-forking, non-threaded model which allows us to handle many
 574    simultaneous connections while remaining impervious to many denial of
 575    service attacks. */
 576
 577 static void process_loop(int accept_sock)
 578 {
 579         /* We'll be doing this a lot */
 580
 581         while (1) {
 582                 struct winbindd_cli_state *state;
 583                 fd_set r_fds, w_fds;
 584                 int maxfd = accept_sock, selret;
 585                 struct timeval timeout;
 586
 587                 /* Free up temporary memory */
 588
 589                 lp_talloc_free();
 590
 591                 /* Initialise fd lists for select() */
 592
 593                 FD_ZERO(&r_fds);
 594                 FD_ZERO(&w_fds);
 595                 FD_SET(accept_sock, &r_fds);
 596
 597                 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
 598                 timeout.tv_usec = 0;
 599
 600                 /* Set up client readers and writers */
 601
 602                 state = client_list;
 603
 604                 while (state) {
 605
 606                         /* Dispose of client connection if it is marked as
 607                            finished */
 608
 609                         if (state->finished) {
 610                                 struct winbindd_cli_state *next = state->next;
 611
 612                                 remove_client(state);
 613                                 state = next;
 614                                 continue;
 615                         }
 616
 617                         /* Select requires we know the highest fd used */
 618
 619                         if (state->sock > maxfd)
 620                                 maxfd = state->sock;
 621
 622                         /* Add fd for reading */
 623
 624                         if (state->read_buf_len != sizeof(state->request))
 625                                 FD_SET(state->sock, &r_fds);
 626
 627                         /* Add fd for writing */
 628
 629                         if (state->write_buf_len)
 630                                 FD_SET(state->sock, &w_fds);
 631
 632                         state = state->next;
 633                 }
 634
 635                 /* Call select */
 636
 637                 selret = select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 638
 639                 if (selret == 0)
 640                         continue;
 641
 642                 if ((selret == -1 && errno != EINTR) || selret == 0) {
 643
 644                         /* Select error, something is badly wrong */
 645
 646                         perror("select");
 647                         exit(1);
 648                 }
 649
 650                 /* Create a new connection if accept_sock readable */
 651
 652                 if (selret > 0) {
 653
 654                         if (FD_ISSET(accept_sock, &r_fds))
 655                                 new_connection(accept_sock);
 656
 657                         /* Process activity on client connections */
 658
 659                         for (state = client_list; state; state = state->next) {
 660
 661                                 /* Data available for reading */
 662
 663                                 if (FD_ISSET(state->sock, &r_fds)) {
 664
 665                                         /* Read data */
 666
 667                                         client_read(state);
 668
 669                                         /*
 670                                          * If we have the start of a
 671                                          * packet, then check the
 672                                          * length field to make sure
 673                                          * the client's not talking
 674                                          * Mock Swedish.
 675                                          */
 676
 677                                         if (state->read_buf_len >= sizeof(uint32)
 678                                             && *(uint32 *) &state->request != sizeof(state->request)) {
 679                                                 DEBUG(0,("process_loop: Invalid request size (%d) send, should be (%d)\n",
 680                                                                 *(uint32 *) &state->request, sizeof(state->request)));
 681
 682                                                 remove_client(state);
 683                                                 break;
 684                                         }
 685
 686                                         /* A request packet might be
 687                                            complete */
 688
 689                                         if (state->read_buf_len ==
 690                                             sizeof(state->request)) {
 691                                                 process_packet(state);
 692                                         }
 693                                 }
 694
 695                                 /* Data available for writing */
 696
 697                                 if (FD_ISSET(state->sock, &w_fds))
 698                                         client_write(state);
 699                         }
 700                 }
 701
 702                 /* Check signal handling things */
 703
 704                 if (do_sigterm)
 705                         terminate();
 706
 707                 if (do_sighup) {
 708
 709                         /* Flush winbindd cache */
 710
 711                         flush_caches();
 712                         reload_services_file(True);
 713                         do_sighup = False;
 714                 }
 715
 716                 if (do_sigusr2) {
 717                         print_winbindd_status();
 718                         do_sigusr2 = False;
 719                 }
 720         }
 721 }
 722
 723 /* Main function */
 724
 725 struct winbindd_state server_state;   /* Server state information */
 726
 727 int main(int argc, char **argv)
 728 {
 729         extern pstring global_myname;
 730         extern fstring global_myworkgroup;
 731         extern BOOL append_log;
 732         pstring logfile;
 733         int accept_sock;
 734         BOOL interactive = False;
 735         int opt, new_debuglevel = -1;
 736
 737         /* glibc (?) likes to print "User defined signal 1" and exit if a
 738            SIGUSR2 is received before a handler is installed */
 739
 740         CatchSignal(SIGUSR2, SIG_IGN);
 741
 742         fault_setup((void (*)(void *))fault_quit );
 743
 744         /* Append to log file by default as we are a single process daemon
 745            program. */
 746
 747         append_log = True;
 748
 749         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 750         lp_set_logfile(logfile);
 751
 752         /* Initialise for running in non-root mode */
 753
 754         sec_init();
 755
 756         /* Set environment variable so we don't recursively call ourselves.
 757            This may also be useful interactively. */
 758
 759         SETENV(WINBINDD_DONT_ENV, "1", 1);
 760
 761         /* Initialise samba/rpc client stuff */
 762
 763         while ((opt = getopt(argc, argv, "id:s:n")) != EOF) {
 764                 switch (opt) {
 765
 766                         /* Don't become a daemon */
 767                 case 'i':
 768                         interactive = True;
 769                         break;
 770
 771                         /* disable cacheing */
 772                 case 'n':
 773                         opt_nocache = True;
 774                         break;
 775
 776                         /* Run with specified debug level */
 777                 case 'd':
 778                         new_debuglevel = atoi(optarg);
 779                         break;
 780
 781                         /* Load a different smb.conf file */
 782                 case 's':
 783                         pstrcpy(dyn_CONFIGFILE,optarg);
 784                         break;
 785
 786                 default:
 787                         printf("Unknown option %c\n", (char)opt);
 788                         exit(1);
 789                 }
 790         }
 791
 792         snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
 793         lp_set_logfile(logfile);
 794         setup_logging("winbindd", interactive);
 795         reopen_logs();
 796
 797         DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
 798         DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
 799
 800         if (!reload_services_file(False)) {
 801                 DEBUG(0, ("error opening config file\n"));
 802                 exit(1);
 803         }
 804
 805         /* Setup names. */
 806         if (!*global_myname) {
 807                 char *p;
 808
 809                 fstrcpy(global_myname, myhostname());
 810                 p = strchr(global_myname, '.');
 811                 if (p)
 812                         *p = 0;
 813         }
 814
 815         fstrcpy(global_myworkgroup, lp_workgroup());
 816
 817         if (new_debuglevel != -1)
 818                 DEBUGLEVEL = new_debuglevel;
 819
 820         if (!interactive)
 821                 become_daemon();
 822
 823 #if HAVE_SETPGID
 824         /*
 825          * If we're interactive we want to set our own process group for
 826          * signal management.
 827          */
 828         if (interactive)
 829                 setpgid( (pid_t)0, (pid_t)0);
 830 #endif
 831
 832         load_interfaces();
 833
 834         secrets_init();
 835
 836         /* Get list of domains we look up requests for.  This includes the
 837                 domain which we are a member of as well as any trusted
 838                 domains. */
 839
 840         get_domain_info();
 841
 842         ZERO_STRUCT(server_state);
 843
 844         /* Winbind daemon initialisation */
 845
 846         if (!winbindd_param_init())
 847                 return 1;
 848
 849         if (!winbindd_idmap_init())
 850                 return 1;
 851
 852         /* Unblock all signals we are interested in as they may have been
 853            blocked by the parent process. */
 854
 855         BlockSignals(False, SIGINT);
 856         BlockSignals(False, SIGQUIT);
 857         BlockSignals(False, SIGTERM);
 858         BlockSignals(False, SIGUSR2);
 859         BlockSignals(False, SIGHUP);
 860
 861         /* Setup signal handlers */
 862
 863         CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
 864         CatchSignal(SIGQUIT, termination_handler);
 865         CatchSignal(SIGTERM, termination_handler);
 866
 867         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 868         CatchSignal(SIGUSR1, SIG_IGN);                 /* Samba messages */
 869
 870         CatchSignal(SIGUSR2, sigusr2_handler);         /* Debugging sigs */
 871         CatchSignal(SIGHUP, sighup_handler);
 872
 873         /* Create UNIX domain socket */
 874
 875         if ((accept_sock = create_sock()) == -1) {
 876                 DEBUG(0, ("failed to create socket\n"));
 877                 return 1;
 878         }
 879
 880         /* Loop waiting for requests */
 881
 882         process_loop(accept_sock);
 883
 884         return 0;
 885 }