source3/winbindd/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    Copyright (C) Volker Lendecke 2004
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "popt_common.h"
  27 #include "winbindd.h"
  28 #include "nsswitch/winbind_client.h"
  29 #include "nsswitch/wb_reqtrans.h"
  30 #include "librpc/gen_ndr/messaging.h"
  31 #include "../librpc/gen_ndr/srv_lsa.h"
  32 #include "../librpc/gen_ndr/srv_samr.h"
  33 #include "secrets.h"
  34 #include "idmap.h"
  35 #include "lib/addrchange.h"
  36 #include "serverid.h"
  37 #include "auth.h"
  38 #include "messages.h"
  39
  40 #undef DBGC_CLASS
  41 #define DBGC_CLASS DBGC_WINBIND
  42
  43 static bool client_is_idle(struct winbindd_cli_state *state);
  44 static void remove_client(struct winbindd_cli_state *state);
  45
  46 static bool opt_nocache = False;
  47 static bool interactive = False;
  48
  49 extern bool override_logfile;
  50
  51 struct messaging_context *winbind_messaging_context(void)
  52 {
  53         struct messaging_context *msg_ctx = server_messaging_context();
  54         if (likely(msg_ctx != NULL)) {
  55                 return msg_ctx;
  56         }
  57         smb_panic("Could not init winbindd's messaging context.\n");
  58         return NULL;
  59 }
  60
  61 /* Reload configuration */
  62
  63 static bool reload_services_file(const char *lfile)
  64 {
  65         bool ret;
  66
  67         if (lp_loaded()) {
  68                 const char *fname = lp_configfile();
  69
  70                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  71                         set_dyn_CONFIGFILE(fname);
  72                 }
  73         }
  74
  75         /* if this is a child, restore the logfile to the special
  76            name - <domain>, idmap, etc. */
  77         if (lfile && *lfile) {
  78                 lp_set_logfile(lfile);
  79         }
  80
  81         reopen_logs();
  82         ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
  83
  84         reopen_logs();
  85         load_interfaces();
  86
  87         return(ret);
  88 }
  89
  90
  91 static void winbindd_status(void)
  92 {
  93         struct winbindd_cli_state *tmp;
  94
  95         DEBUG(0, ("winbindd status:\n"));
  96
  97         /* Print client state information */
  98
  99         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 100
 101         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 102                 DEBUG(2, ("\tclient list:\n"));
 103                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 104                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 105                                      (unsigned long)tmp->pid, tmp->sock,
 106                                      client_is_idle(tmp) ? "idle" : "active"));
 107                 }
 108         }
 109 }
 110
 111 /* Flush client cache */
 112
 113 static void flush_caches(void)
 114 {
 115         /* We need to invalidate cached user list entries on a SIGHUP
 116            otherwise cached access denied errors due to restrict anonymous
 117            hang around until the sequence number changes. */
 118
 119         if (!wcache_invalidate_cache()) {
 120                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 121                 if (!winbindd_cache_validate_and_initialize()) {
 122                         exit(1);
 123                 }
 124         }
 125 }
 126
 127 static void flush_caches_noinit(void)
 128 {
 129         /*
 130          * We need to invalidate cached user list entries on a SIGHUP
 131          * otherwise cached access denied errors due to restrict anonymous
 132          * hang around until the sequence number changes.
 133          * NB
 134          * Skip uninitialized domains when flush cache.
 135          * If domain is not initialized, it means it is never
 136          * used or never become online. look, wcache_invalidate_cache()
 137          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 138          * for unused domains and large traffic for primay domain's DC if there
 139          * are many domains..
 140          */
 141
 142         if (!wcache_invalidate_cache_noinit()) {
 143                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 144                 if (!winbindd_cache_validate_and_initialize()) {
 145                         exit(1);
 146                 }
 147         }
 148 }
 149
 150 /* Handle the signal by unlinking socket and exiting */
 151
 152 static void terminate(bool is_parent)
 153 {
 154         if (is_parent) {
 155                 /* When parent goes away we should
 156                  * remove the socket file. Not so
 157                  * when children terminate.
 158                  */
 159                 char *path = NULL;
 160
 161                 if (asprintf(&path, "%s/%s",
 162                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 163                         unlink(path);
 164                         SAFE_FREE(path);
 165                 }
 166         }
 167
 168         idmap_close();
 169
 170         trustdom_cache_shutdown();
 171
 172         gencache_stabilize();
 173
 174 #if 0
 175         if (interactive) {
 176                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 177                 char *description = talloc_describe_all(mem_ctx);
 178
 179                 DEBUG(3, ("tallocs left:\n%s\n", description));
 180                 talloc_destroy(mem_ctx);
 181         }
 182 #endif
 183
 184         if (is_parent) {
 185                 serverid_deregister(procid_self());
 186                 pidfile_unlink();
 187         }
 188
 189         exit(0);
 190 }
 191
 192 static void winbindd_sig_term_handler(struct tevent_context *ev,
 193                                       struct tevent_signal *se,
 194                                       int signum,
 195                                       int count,
 196                                       void *siginfo,
 197                                       void *private_data)
 198 {
 199         bool *is_parent = talloc_get_type_abort(private_data, bool);
 200
 201         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 202                  signum, (int)*is_parent));
 203         terminate(*is_parent);
 204 }
 205
 206 bool winbindd_setup_sig_term_handler(bool parent)
 207 {
 208         struct tevent_signal *se;
 209         bool *is_parent;
 210
 211         is_parent = talloc(winbind_event_context(), bool);
 212         if (!is_parent) {
 213                 return false;
 214         }
 215
 216         *is_parent = parent;
 217
 218         se = tevent_add_signal(winbind_event_context(),
 219                                is_parent,
 220                                SIGTERM, 0,
 221                                winbindd_sig_term_handler,
 222                                is_parent);
 223         if (!se) {
 224                 DEBUG(0,("failed to setup SIGTERM handler"));
 225                 talloc_free(is_parent);
 226                 return false;
 227         }
 228
 229         se = tevent_add_signal(winbind_event_context(),
 230                                is_parent,
 231                                SIGINT, 0,
 232                                winbindd_sig_term_handler,
 233                                is_parent);
 234         if (!se) {
 235                 DEBUG(0,("failed to setup SIGINT handler"));
 236                 talloc_free(is_parent);
 237                 return false;
 238         }
 239
 240         se = tevent_add_signal(winbind_event_context(),
 241                                is_parent,
 242                                SIGQUIT, 0,
 243                                winbindd_sig_term_handler,
 244                                is_parent);
 245         if (!se) {
 246                 DEBUG(0,("failed to setup SIGINT handler"));
 247                 talloc_free(is_parent);
 248                 return false;
 249         }
 250
 251         return true;
 252 }
 253
 254 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 255                                      struct tevent_signal *se,
 256                                      int signum,
 257                                      int count,
 258                                      void *siginfo,
 259                                      void *private_data)
 260 {
 261         const char *file = (const char *)private_data;
 262
 263         DEBUG(1,("Reloading services after SIGHUP\n"));
 264         flush_caches_noinit();
 265         reload_services_file(file);
 266 }
 267
 268 bool winbindd_setup_sig_hup_handler(const char *lfile)
 269 {
 270         struct tevent_signal *se;
 271         char *file = NULL;
 272
 273         if (lfile) {
 274                 file = talloc_strdup(winbind_event_context(),
 275                                      lfile);
 276                 if (!file) {
 277                         return false;
 278                 }
 279         }
 280
 281         se = tevent_add_signal(winbind_event_context(),
 282                                winbind_event_context(),
 283                                SIGHUP, 0,
 284                                winbindd_sig_hup_handler,
 285                                file);
 286         if (!se) {
 287                 return false;
 288         }
 289
 290         return true;
 291 }
 292
 293 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 294                                       struct tevent_signal *se,
 295                                       int signum,
 296                                       int count,
 297                                       void *siginfo,
 298                                       void *private_data)
 299 {
 300         pid_t pid;
 301
 302         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 303                 winbind_child_died(pid);
 304         }
 305 }
 306
 307 static bool winbindd_setup_sig_chld_handler(void)
 308 {
 309         struct tevent_signal *se;
 310
 311         se = tevent_add_signal(winbind_event_context(),
 312                                winbind_event_context(),
 313                                SIGCHLD, 0,
 314                                winbindd_sig_chld_handler,
 315                                NULL);
 316         if (!se) {
 317                 return false;
 318         }
 319
 320         return true;
 321 }
 322
 323 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 324                                       struct tevent_signal *se,
 325                                       int signum,
 326                                       int count,
 327                                       void *siginfo,
 328                                       void *private_data)
 329 {
 330         winbindd_status();
 331 }
 332
 333 static bool winbindd_setup_sig_usr2_handler(void)
 334 {
 335         struct tevent_signal *se;
 336
 337         se = tevent_add_signal(winbind_event_context(),
 338                                winbind_event_context(),
 339                                SIGUSR2, 0,
 340                                winbindd_sig_usr2_handler,
 341                                NULL);
 342         if (!se) {
 343                 return false;
 344         }
 345
 346         return true;
 347 }
 348
 349 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 350 static void msg_reload_services(struct messaging_context *msg,
 351                                 void *private_data,
 352                                 uint32_t msg_type,
 353                                 struct server_id server_id,
 354                                 DATA_BLOB *data)
 355 {
 356         /* Flush various caches */
 357         flush_caches();
 358         reload_services_file((const char *) private_data);
 359 }
 360
 361 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 362 static void msg_shutdown(struct messaging_context *msg,
 363                          void *private_data,
 364                          uint32_t msg_type,
 365                          struct server_id server_id,
 366                          DATA_BLOB *data)
 367 {
 368         /* only the parent waits for this message */
 369         DEBUG(0,("Got shutdown message\n"));
 370         terminate(true);
 371 }
 372
 373
 374 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 375                                        void *private_data,
 376                                        uint32_t msg_type,
 377                                        struct server_id server_id,
 378                                        DATA_BLOB *data)
 379 {
 380         uint8 ret;
 381         pid_t child_pid;
 382
 383         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 384                    "message.\n"));
 385
 386         /*
 387          * call the validation code from a child:
 388          * so we don't block the main winbindd and the validation
 389          * code can safely use fork/waitpid...
 390          */
 391         child_pid = sys_fork();
 392
 393         if (child_pid == -1) {
 394                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 395                           strerror(errno)));
 396                 return;
 397         }
 398
 399         if (child_pid != 0) {
 400                 /* parent */
 401                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 402                           "pid %d.\n", (int)child_pid));
 403                 return;
 404         }
 405
 406         /* child */
 407
 408         if (!winbindd_reinit_after_fork(NULL)) {
 409                 _exit(0);
 410         }
 411
 412         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 413         CatchSignal(SIGCHLD, SIG_DFL);
 414
 415         ret = (uint8)winbindd_validate_cache_nobackup();
 416         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 417         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 418                            (size_t)1);
 419         _exit(0);
 420 }
 421
 422 static struct winbindd_dispatch_table {
 423         enum winbindd_cmd cmd;
 424         void (*fn)(struct winbindd_cli_state *state);
 425         const char *winbindd_cmd_name;
 426 } dispatch_table[] = {
 427
 428         /* Enumeration functions */
 429
 430         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 431           "LIST_TRUSTDOM" },
 432
 433         /* Miscellaneous */
 434
 435         { WINBINDD_INFO, winbindd_info, "INFO" },
 436         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 437           "INTERFACE_VERSION" },
 438         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 439         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 440         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 441         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 442         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 443           "WINBINDD_PRIV_PIPE_DIR" },
 444
 445         /* Credential cache access */
 446         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 447         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 448
 449         /* WINS functions */
 450
 451         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 452         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 453
 454         /* End of list */
 455
 456         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 457 };
 458
 459 struct winbindd_async_dispatch_table {
 460         enum winbindd_cmd cmd;
 461         const char *cmd_name;
 462         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 463                                        struct tevent_context *ev,
 464                                        struct winbindd_cli_state *cli,
 465                                        struct winbindd_request *request);
 466         NTSTATUS (*recv_req)(struct tevent_req *req,
 467                              struct winbindd_response *presp);
 468 };
 469
 470 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 471         { WINBINDD_PING, "PING",
 472           wb_ping_send, wb_ping_recv },
 473         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 474           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 475         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 476           winbindd_lookupname_send, winbindd_lookupname_recv },
 477         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 478           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 479         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 480           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 481         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 482           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 483         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 484           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 485         { WINBINDD_GETPWSID, "GETPWSID",
 486           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 487         { WINBINDD_GETPWNAM, "GETPWNAM",
 488           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 489         { WINBINDD_GETPWUID, "GETPWUID",
 490           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 491         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 492           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 493         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 494           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 495         { WINBINDD_GETGROUPS, "GETGROUPS",
 496           winbindd_getgroups_send, winbindd_getgroups_recv },
 497         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 498           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 499         { WINBINDD_GETGRGID, "GETGRGID",
 500           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 501         { WINBINDD_GETGRNAM, "GETGRNAM",
 502           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 503         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 504           winbindd_getusersids_send, winbindd_getusersids_recv },
 505         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 506           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 507         { WINBINDD_SETPWENT, "SETPWENT",
 508           winbindd_setpwent_send, winbindd_setpwent_recv },
 509         { WINBINDD_GETPWENT, "GETPWENT",
 510           winbindd_getpwent_send, winbindd_getpwent_recv },
 511         { WINBINDD_ENDPWENT, "ENDPWENT",
 512           winbindd_endpwent_send, winbindd_endpwent_recv },
 513         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 514           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 515         { WINBINDD_GETDCNAME, "GETDCNAME",
 516           winbindd_getdcname_send, winbindd_getdcname_recv },
 517         { WINBINDD_SETGRENT, "SETGRENT",
 518           winbindd_setgrent_send, winbindd_setgrent_recv },
 519         { WINBINDD_GETGRENT, "GETGRENT",
 520           winbindd_getgrent_send, winbindd_getgrent_recv },
 521         { WINBINDD_ENDGRENT, "ENDGRENT",
 522           winbindd_endgrent_send, winbindd_endgrent_recv },
 523         { WINBINDD_LIST_USERS, "LIST_USERS",
 524           winbindd_list_users_send, winbindd_list_users_recv },
 525         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 526           winbindd_list_groups_send, winbindd_list_groups_recv },
 527         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 528           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 529         { WINBINDD_PING_DC, "PING_DC",
 530           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 531         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 532           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 533         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 534           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 535         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 536           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 537         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 538           winbindd_pam_chng_pswd_auth_crap_send,
 539           winbindd_pam_chng_pswd_auth_crap_recv },
 540
 541         { 0, NULL, NULL, NULL }
 542 };
 543
 544 static struct winbindd_async_dispatch_table async_priv_table[] = {
 545         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 546           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 547         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 548           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 549         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 550           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 551         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 552           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 553
 554         { 0, NULL, NULL, NULL }
 555 };
 556
 557 static void wb_request_done(struct tevent_req *req);
 558
 559 static void process_request(struct winbindd_cli_state *state)
 560 {
 561         struct winbindd_dispatch_table *table = dispatch_table;
 562         struct winbindd_async_dispatch_table *atable;
 563
 564         state->mem_ctx = talloc_named(state, 0, "winbind request");
 565         if (state->mem_ctx == NULL)
 566                 return;
 567
 568         /* Remember who asked us. */
 569         state->pid = state->request->pid;
 570
 571         state->cmd_name = "unknown request";
 572         state->recv_fn = NULL;
 573
 574         /* Process command */
 575
 576         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 577                 if (state->request->cmd == atable->cmd) {
 578                         break;
 579                 }
 580         }
 581
 582         if ((atable->send_req == NULL) && state->privileged) {
 583                 for (atable = async_priv_table; atable->send_req;
 584                      atable += 1) {
 585                         if (state->request->cmd == atable->cmd) {
 586                                 break;
 587                         }
 588                 }
 589         }
 590
 591         if (atable->send_req != NULL) {
 592                 struct tevent_req *req;
 593
 594                 state->cmd_name = atable->cmd_name;
 595                 state->recv_fn = atable->recv_req;
 596
 597                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 598                            (int)state->pid, state->cmd_name));
 599
 600                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 601                                        state, state->request);
 602                 if (req == NULL) {
 603                         DEBUG(0, ("process_request: atable->send failed for "
 604                                   "%s\n", atable->cmd_name));
 605                         request_error(state);
 606                         return;
 607                 }
 608                 tevent_req_set_callback(req, wb_request_done, state);
 609                 return;
 610         }
 611
 612         state->response = talloc_zero(state->mem_ctx,
 613                                       struct winbindd_response);
 614         if (state->response == NULL) {
 615                 DEBUG(10, ("talloc failed\n"));
 616                 remove_client(state);
 617                 return;
 618         }
 619         state->response->result = WINBINDD_PENDING;
 620         state->response->length = sizeof(struct winbindd_response);
 621
 622         for (table = dispatch_table; table->fn; table++) {
 623                 if (state->request->cmd == table->cmd) {
 624                         DEBUG(10,("process_request: request fn %s\n",
 625                                   table->winbindd_cmd_name ));
 626                         state->cmd_name = table->winbindd_cmd_name;
 627                         table->fn(state);
 628                         break;
 629                 }
 630         }
 631
 632         if (!table->fn) {
 633                 DEBUG(10,("process_request: unknown request fn number %d\n",
 634                           (int)state->request->cmd ));
 635                 request_error(state);
 636         }
 637 }
 638
 639 static void wb_request_done(struct tevent_req *req)
 640 {
 641         struct winbindd_cli_state *state = tevent_req_callback_data(
 642                 req, struct winbindd_cli_state);
 643         NTSTATUS status;
 644
 645         state->response = talloc_zero(state->mem_ctx,
 646                                       struct winbindd_response);
 647         if (state->response == NULL) {
 648                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 649                           (int)state->pid, state->cmd_name));
 650                 remove_client(state);
 651                 return;
 652         }
 653         state->response->result = WINBINDD_PENDING;
 654         state->response->length = sizeof(struct winbindd_response);
 655
 656         status = state->recv_fn(req, state->response);
 657         TALLOC_FREE(req);
 658
 659         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 660                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 661
 662         if (!NT_STATUS_IS_OK(status)) {
 663                 request_error(state);
 664                 return;
 665         }
 666         request_ok(state);
 667 }
 668
 669 /*
 670  * This is the main event loop of winbind requests. It goes through a
 671  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 672  *
 673  * An idle winbind client has a read request of 4 bytes outstanding,
 674  * finalizing function is request_len_recv, checking the length. request_recv
 675  * then processes the packet. The processing function then at some point has
 676  * to call request_finished which schedules sending the response.
 677  */
 678
 679 static void request_finished(struct winbindd_cli_state *state);
 680
 681 static void winbind_client_request_read(struct tevent_req *req);
 682 static void winbind_client_response_written(struct tevent_req *req);
 683
 684 static void request_finished(struct winbindd_cli_state *state)
 685 {
 686         struct tevent_req *req;
 687
 688         TALLOC_FREE(state->request);
 689
 690         req = wb_resp_write_send(state, winbind_event_context(),
 691                                  state->out_queue, state->sock,
 692                                  state->response);
 693         if (req == NULL) {
 694                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 695                           (int)state->pid, state->cmd_name));
 696                 remove_client(state);
 697                 return;
 698         }
 699         tevent_req_set_callback(req, winbind_client_response_written, state);
 700 }
 701
 702 static void winbind_client_response_written(struct tevent_req *req)
 703 {
 704         struct winbindd_cli_state *state = tevent_req_callback_data(
 705                 req, struct winbindd_cli_state);
 706         ssize_t ret;
 707         int err;
 708
 709         ret = wb_resp_write_recv(req, &err);
 710         TALLOC_FREE(req);
 711         if (ret == -1) {
 712                 close(state->sock);
 713                 state->sock = -1;
 714                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 715                           (int)state->pid, state->cmd_name, strerror(err)));
 716                 remove_client(state);
 717                 return;
 718         }
 719
 720         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 721                   "to client\n", (int)state->pid, state->cmd_name));
 722
 723         TALLOC_FREE(state->mem_ctx);
 724         state->response = NULL;
 725         state->cmd_name = "no request";
 726         state->recv_fn = NULL;
 727
 728         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 729                                WINBINDD_MAX_EXTRA_DATA);
 730         if (req == NULL) {
 731                 remove_client(state);
 732                 return;
 733         }
 734         tevent_req_set_callback(req, winbind_client_request_read, state);
 735 }
 736
 737 void request_error(struct winbindd_cli_state *state)
 738 {
 739         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 740         state->response->result = WINBINDD_ERROR;
 741         request_finished(state);
 742 }
 743
 744 void request_ok(struct winbindd_cli_state *state)
 745 {
 746         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 747         state->response->result = WINBINDD_OK;
 748         request_finished(state);
 749 }
 750
 751 /* Process a new connection by adding it to the client connection list */
 752
 753 static void new_connection(int listen_sock, bool privileged)
 754 {
 755         struct sockaddr_un sunaddr;
 756         struct winbindd_cli_state *state;
 757         struct tevent_req *req;
 758         socklen_t len;
 759         int sock;
 760
 761         /* Accept connection */
 762
 763         len = sizeof(sunaddr);
 764
 765         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 766
 767         if (sock == -1) {
 768                 if (errno != EINTR) {
 769                         DEBUG(0, ("Faild to accept socket - %s\n",
 770                                   strerror(errno)));
 771                 }
 772                 return;
 773         }
 774
 775         DEBUG(6,("accepted socket %d\n", sock));
 776
 777         /* Create new connection structure */
 778
 779         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 780                 close(sock);
 781                 return;
 782         }
 783
 784         state->sock = sock;
 785
 786         state->out_queue = tevent_queue_create(state, "winbind client reply");
 787         if (state->out_queue == NULL) {
 788                 close(sock);
 789                 TALLOC_FREE(state);
 790                 return;
 791         }
 792
 793         state->last_access = time(NULL);
 794
 795         state->privileged = privileged;
 796
 797         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 798                                WINBINDD_MAX_EXTRA_DATA);
 799         if (req == NULL) {
 800                 TALLOC_FREE(state);
 801                 close(sock);
 802                 return;
 803         }
 804         tevent_req_set_callback(req, winbind_client_request_read, state);
 805
 806         /* Add to connection list */
 807
 808         winbindd_add_client(state);
 809 }
 810
 811 static void winbind_client_request_read(struct tevent_req *req)
 812 {
 813         struct winbindd_cli_state *state = tevent_req_callback_data(
 814                 req, struct winbindd_cli_state);
 815         ssize_t ret;
 816         int err;
 817
 818         ret = wb_req_read_recv(req, state, &state->request, &err);
 819         TALLOC_FREE(req);
 820         if (ret == -1) {
 821                 if (err == EPIPE) {
 822                         DEBUG(6, ("closing socket %d, client exited\n",
 823                                   state->sock));
 824                 } else {
 825                         DEBUG(2, ("Could not read client request from fd %d: "
 826                                   "%s\n", state->sock, strerror(err)));
 827                 }
 828                 close(state->sock);
 829                 state->sock = -1;
 830                 remove_client(state);
 831                 return;
 832         }
 833         process_request(state);
 834 }
 835
 836 /* Remove a client connection from client connection list */
 837
 838 static void remove_client(struct winbindd_cli_state *state)
 839 {
 840         char c = 0;
 841         int nwritten;
 842
 843         /* It's a dead client - hold a funeral */
 844
 845         if (state == NULL) {
 846                 return;
 847         }
 848
 849         if (state->sock != -1) {
 850                 /* tell client, we are closing ... */
 851                 nwritten = write(state->sock, &c, sizeof(c));
 852                 if (nwritten == -1) {
 853                         DEBUG(2, ("final write to client failed: %s\n",
 854                                 strerror(errno)));
 855                 }
 856
 857                 /* Close socket */
 858
 859                 close(state->sock);
 860                 state->sock = -1;
 861         }
 862
 863         TALLOC_FREE(state->mem_ctx);
 864
 865         /* Remove from list and free */
 866
 867         winbindd_remove_client(state);
 868         TALLOC_FREE(state);
 869 }
 870
 871 /* Is a client idle? */
 872
 873 static bool client_is_idle(struct winbindd_cli_state *state) {
 874   return (state->response == NULL &&
 875           !state->pwent_state && !state->grent_state);
 876 }
 877
 878 /* Shutdown client connection which has been idle for the longest time */
 879
 880 static bool remove_idle_client(void)
 881 {
 882         struct winbindd_cli_state *state, *remove_state = NULL;
 883         time_t last_access = 0;
 884         int nidle = 0;
 885
 886         for (state = winbindd_client_list(); state; state = state->next) {
 887                 if (client_is_idle(state)) {
 888                         nidle++;
 889                         if (!last_access || state->last_access < last_access) {
 890                                 last_access = state->last_access;
 891                                 remove_state = state;
 892                         }
 893                 }
 894         }
 895
 896         if (remove_state) {
 897                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 898                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 899                 remove_client(remove_state);
 900                 return True;
 901         }
 902
 903         return False;
 904 }
 905
 906 struct winbindd_listen_state {
 907         bool privileged;
 908         int fd;
 909 };
 910
 911 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 912                                         struct tevent_fd *fde,
 913                                         uint16_t flags,
 914                                         void *private_data)
 915 {
 916         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 917                                           struct winbindd_listen_state);
 918
 919         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 920                 DEBUG(5,("winbindd: Exceeding %d client "
 921                          "connections, removing idle "
 922                          "connection.\n", lp_winbind_max_clients()));
 923                 if (!remove_idle_client()) {
 924                         DEBUG(0,("winbindd: Exceeding %d "
 925                                  "client connections, no idle "
 926                                  "connection found\n",
 927                                  lp_winbind_max_clients()));
 928                         break;
 929                 }
 930         }
 931         new_connection(s->fd, s->privileged);
 932 }
 933
 934 /*
 935  * Winbindd socket accessor functions
 936  */
 937
 938 const char *get_winbind_pipe_dir(void)
 939 {
 940         return lp_parm_const_string(-1, "winbindd", "socket dir", WINBINDD_SOCKET_DIR);
 941 }
 942
 943 char *get_winbind_priv_pipe_dir(void)
 944 {
 945         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 946 }
 947
 948 static bool winbindd_setup_listeners(void)
 949 {
 950         struct winbindd_listen_state *pub_state = NULL;
 951         struct winbindd_listen_state *priv_state = NULL;
 952         struct tevent_fd *fde;
 953
 954         pub_state = talloc(winbind_event_context(),
 955                            struct winbindd_listen_state);
 956         if (!pub_state) {
 957                 goto failed;
 958         }
 959
 960         pub_state->privileged = false;
 961         pub_state->fd = create_pipe_sock(
 962                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 963         if (pub_state->fd == -1) {
 964                 goto failed;
 965         }
 966
 967         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 968                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 969                             pub_state);
 970         if (fde == NULL) {
 971                 close(pub_state->fd);
 972                 goto failed;
 973         }
 974         tevent_fd_set_auto_close(fde);
 975
 976         priv_state = talloc(winbind_event_context(),
 977                             struct winbindd_listen_state);
 978         if (!priv_state) {
 979                 goto failed;
 980         }
 981
 982         priv_state->privileged = true;
 983         priv_state->fd = create_pipe_sock(
 984                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 985         if (priv_state->fd == -1) {
 986                 goto failed;
 987         }
 988
 989         fde = tevent_add_fd(winbind_event_context(), priv_state,
 990                             priv_state->fd, TEVENT_FD_READ,
 991                             winbindd_listen_fde_handler, priv_state);
 992         if (fde == NULL) {
 993                 close(priv_state->fd);
 994                 goto failed;
 995         }
 996         tevent_fd_set_auto_close(fde);
 997
 998         return true;
 999 failed:
1000         TALLOC_FREE(pub_state);
1001         TALLOC_FREE(priv_state);
1002         return false;
1003 }
1004
1005 bool winbindd_use_idmap_cache(void)
1006 {
1007         return !opt_nocache;
1008 }
1009
1010 bool winbindd_use_cache(void)
1011 {
1012         return !opt_nocache;
1013 }
1014
1015 void winbindd_register_handlers(void)
1016 {
1017         struct tevent_timer *te;
1018         /* Setup signal handlers */
1019
1020         if (!winbindd_setup_sig_term_handler(true))
1021                 exit(1);
1022         if (!winbindd_setup_sig_hup_handler(NULL))
1023                 exit(1);
1024         if (!winbindd_setup_sig_chld_handler())
1025                 exit(1);
1026         if (!winbindd_setup_sig_usr2_handler())
1027                 exit(1);
1028
1029         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1030
1031         /*
1032          * Ensure all cache and idmap caches are consistent
1033          * and initialized before we startup.
1034          */
1035         if (!winbindd_cache_validate_and_initialize()) {
1036                 exit(1);
1037         }
1038
1039         /* get broadcast messages */
1040
1041         if (!serverid_register(procid_self(),
1042                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1043                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1044                 exit(1);
1045         }
1046
1047         /* React on 'smbcontrol winbindd reload-config' in the same way
1048            as to SIGHUP signal */
1049         messaging_register(winbind_messaging_context(), NULL,
1050                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1051         messaging_register(winbind_messaging_context(), NULL,
1052                            MSG_SHUTDOWN, msg_shutdown);
1053
1054         /* Handle online/offline messages. */
1055         messaging_register(winbind_messaging_context(), NULL,
1056                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1057         messaging_register(winbind_messaging_context(), NULL,
1058                            MSG_WINBIND_ONLINE, winbind_msg_online);
1059         messaging_register(winbind_messaging_context(), NULL,
1060                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1061
1062         messaging_register(winbind_messaging_context(), NULL,
1063                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1064
1065         messaging_register(winbind_messaging_context(), NULL,
1066                            MSG_WINBIND_VALIDATE_CACHE,
1067                            winbind_msg_validate_cache);
1068
1069         messaging_register(winbind_messaging_context(), NULL,
1070                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1071                            winbind_msg_dump_domain_list);
1072
1073         messaging_register(winbind_messaging_context(), NULL,
1074                            MSG_WINBIND_IP_DROPPED,
1075                            winbind_msg_ip_dropped_parent);
1076
1077         /* Register handler for MSG_DEBUG. */
1078         messaging_register(winbind_messaging_context(), NULL,
1079                            MSG_DEBUG,
1080                            winbind_msg_debug);
1081
1082         netsamlogon_cache_init(); /* Non-critical */
1083
1084         /* clear the cached list of trusted domains */
1085
1086         wcache_tdc_clear();
1087
1088         if (!init_domain_list()) {
1089                 DEBUG(0,("unable to initialize domain list\n"));
1090                 exit(1);
1091         }
1092
1093         init_idmap_child();
1094         init_locator_child();
1095
1096         smb_nscd_flush_user_cache();
1097         smb_nscd_flush_group_cache();
1098
1099         te = tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1100                               rescan_trusted_domains, NULL);
1101         if (te == NULL) {
1102                 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1103                 exit(1);
1104         }
1105
1106 }
1107
1108 struct winbindd_addrchanged_state {
1109         struct addrchange_context *ctx;
1110         struct tevent_context *ev;
1111         struct messaging_context *msg_ctx;
1112 };
1113
1114 static void winbindd_addr_changed(struct tevent_req *req);
1115
1116 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1117                                      struct tevent_context *ev,
1118                                      struct messaging_context *msg_ctx)
1119 {
1120         struct winbindd_addrchanged_state *state;
1121         struct tevent_req *req;
1122         NTSTATUS status;
1123
1124         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1125         if (state == NULL) {
1126                 DEBUG(10, ("talloc failed\n"));
1127                 return;
1128         }
1129         state->ev = ev;
1130         state->msg_ctx = msg_ctx;
1131
1132         status = addrchange_context_create(state, &state->ctx);
1133         if (!NT_STATUS_IS_OK(status)) {
1134                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1135                            nt_errstr(status)));
1136                 TALLOC_FREE(state);
1137                 return;
1138         }
1139         req = addrchange_send(state, ev, state->ctx);
1140         if (req == NULL) {
1141                 DEBUG(0, ("addrchange_send failed\n"));
1142                 TALLOC_FREE(state);
1143                 return;
1144         }
1145         tevent_req_set_callback(req, winbindd_addr_changed, state);
1146 }
1147
1148 static void winbindd_addr_changed(struct tevent_req *req)
1149 {
1150         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1151                 req, struct winbindd_addrchanged_state);
1152         enum addrchange_type type;
1153         struct sockaddr_storage addr;
1154         NTSTATUS status;
1155
1156         status = addrchange_recv(req, &type, &addr);
1157         TALLOC_FREE(req);
1158         if (!NT_STATUS_IS_OK(status)) {
1159                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1160                            nt_errstr(status)));
1161                 TALLOC_FREE(state);
1162                 return;
1163         }
1164         if (type == ADDRCHANGE_DEL) {
1165                 char addrstr[INET6_ADDRSTRLEN];
1166                 DATA_BLOB blob;
1167
1168                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1169
1170                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1171                           addrstr));
1172
1173                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1174
1175                 status = messaging_send(state->msg_ctx,
1176                                         messaging_server_id(state->msg_ctx),
1177                                         MSG_WINBIND_IP_DROPPED, &blob);
1178                 if (!NT_STATUS_IS_OK(status)) {
1179                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1180                                    nt_errstr(status)));
1181                 }
1182         }
1183         req = addrchange_send(state, state->ev, state->ctx);
1184         if (req == NULL) {
1185                 DEBUG(0, ("addrchange_send failed\n"));
1186                 TALLOC_FREE(state);
1187                 return;
1188         }
1189         tevent_req_set_callback(req, winbindd_addr_changed, state);
1190 }
1191
1192 /* Main function */
1193
1194 int main(int argc, char **argv, char **envp)
1195 {
1196         static bool is_daemon = False;
1197         static bool Fork = True;
1198         static bool log_stdout = False;
1199         static bool no_process_group = False;
1200         enum {
1201                 OPT_DAEMON = 1000,
1202                 OPT_FORK,
1203                 OPT_NO_PROCESS_GROUP,
1204                 OPT_LOG_STDOUT
1205         };
1206         struct poptOption long_options[] = {
1207                 POPT_AUTOHELP
1208                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1209                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1210                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1211                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1212                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1213                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1214                 POPT_COMMON_SAMBA
1215                 POPT_TABLEEND
1216         };
1217         poptContext pc;
1218         int opt;
1219         TALLOC_CTX *frame;
1220         NTSTATUS status;
1221
1222         /*
1223          * Do this before any other talloc operation
1224          */
1225         talloc_enable_null_tracking();
1226         frame = talloc_stackframe();
1227
1228         /* glibc (?) likes to print "User defined signal 1" and exit if a
1229            SIGUSR[12] is received before a handler is installed */
1230
1231         CatchSignal(SIGUSR1, SIG_IGN);
1232         CatchSignal(SIGUSR2, SIG_IGN);
1233
1234         fault_setup();
1235         dump_core_setup("winbindd", lp_logfile());
1236
1237         load_case_tables();
1238
1239         /* Initialise for running in non-root mode */
1240
1241         sec_init();
1242
1243         set_remote_machine_name("winbindd", False);
1244
1245         /* Set environment variable so we don't recursively call ourselves.
1246            This may also be useful interactively. */
1247
1248         if ( !winbind_off() ) {
1249                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1250                 exit(1);
1251         }
1252
1253         /* Initialise samba/rpc client stuff */
1254
1255         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1256
1257         while ((opt = poptGetNextOpt(pc)) != -1) {
1258                 switch (opt) {
1259                         /* Don't become a daemon */
1260                 case OPT_DAEMON:
1261                         is_daemon = True;
1262                         break;
1263                 case 'i':
1264                         interactive = True;
1265                         log_stdout = True;
1266                         Fork = False;
1267                         break;
1268                 case OPT_FORK:
1269                         Fork = false;
1270                         break;
1271                 case OPT_NO_PROCESS_GROUP:
1272                         no_process_group = true;
1273                         break;
1274                 case OPT_LOG_STDOUT:
1275                         log_stdout = true;
1276                         break;
1277                 case 'n':
1278                         opt_nocache = true;
1279                         break;
1280                 default:
1281                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1282                                   poptBadOption(pc, 0), poptStrerror(opt));
1283                         poptPrintUsage(pc, stderr, 0);
1284                         exit(1);
1285                 }
1286         }
1287
1288         if (is_daemon && interactive) {
1289                 d_fprintf(stderr,"\nERROR: "
1290                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1291                 poptPrintUsage(pc, stderr, 0);
1292                 exit(1);
1293         }
1294
1295         if (log_stdout && Fork) {
1296                 d_fprintf(stderr, "\nERROR: "
1297                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1298                 poptPrintUsage(pc, stderr, 0);
1299                 exit(1);
1300         }
1301
1302         poptFreeContext(pc);
1303
1304         if (!override_logfile) {
1305                 char *lfile = NULL;
1306                 if (asprintf(&lfile,"%s/log.winbindd",
1307                                 get_dyn_LOGFILEBASE()) > 0) {
1308                         lp_set_logfile(lfile);
1309                         SAFE_FREE(lfile);
1310                 }
1311         }
1312         if (log_stdout) {
1313                 setup_logging("winbindd", DEBUG_STDOUT);
1314         } else {
1315                 setup_logging("winbindd", DEBUG_FILE);
1316         }
1317         reopen_logs();
1318
1319         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1320         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1321
1322         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1323                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1324                 exit(1);
1325         }
1326
1327         /* Initialise messaging system */
1328
1329         if (winbind_messaging_context() == NULL) {
1330                 exit(1);
1331         }
1332
1333         if (!reload_services_file(NULL)) {
1334                 DEBUG(0, ("error opening config file\n"));
1335                 exit(1);
1336         }
1337
1338         if (!directory_exist(lp_lockdir())) {
1339                 mkdir(lp_lockdir(), 0755);
1340         }
1341
1342         /* Setup names. */
1343
1344         if (!init_names())
1345                 exit(1);
1346
1347         load_interfaces();
1348
1349         if (!secrets_init()) {
1350
1351                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1352                 return False;
1353         }
1354
1355         /* Unblock all signals we are interested in as they may have been
1356            blocked by the parent process. */
1357
1358         BlockSignals(False, SIGINT);
1359         BlockSignals(False, SIGQUIT);
1360         BlockSignals(False, SIGTERM);
1361         BlockSignals(False, SIGUSR1);
1362         BlockSignals(False, SIGUSR2);
1363         BlockSignals(False, SIGHUP);
1364         BlockSignals(False, SIGCHLD);
1365
1366         if (!interactive)
1367                 become_daemon(Fork, no_process_group, log_stdout);
1368
1369         pidfile_create("winbindd");
1370
1371 #if HAVE_SETPGID
1372         /*
1373          * If we're interactive we want to set our own process group for
1374          * signal management.
1375          */
1376         if (interactive && !no_process_group)
1377                 setpgid( (pid_t)0, (pid_t)0);
1378 #endif
1379
1380         TimeInit();
1381
1382         /* Don't use winbindd_reinit_after_fork here as
1383          * we're just starting up and haven't created any
1384          * winbindd-specific resources we must free yet. JRA.
1385          */
1386
1387         status = reinit_after_fork(winbind_messaging_context(),
1388                                    winbind_event_context(),
1389                                    procid_self(), false);
1390         if (!NT_STATUS_IS_OK(status)) {
1391                 DEBUG(0,("reinit_after_fork() failed\n"));
1392                 exit(1);
1393         }
1394
1395         winbindd_register_handlers();
1396
1397         status = init_system_info();
1398         if (!NT_STATUS_IS_OK(status)) {
1399                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1400                           nt_errstr(status)));
1401                 exit(1);
1402         }
1403
1404         rpc_lsarpc_init(NULL);
1405         rpc_samr_init(NULL);
1406
1407         winbindd_init_addrchange(NULL, winbind_event_context(),
1408                                  winbind_messaging_context());
1409
1410         /* setup listen sockets */
1411
1412         if (!winbindd_setup_listeners()) {
1413                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1414                 exit(1);
1415         }
1416
1417         TALLOC_FREE(frame);
1418         /* Loop waiting for requests */
1419         while (1) {
1420                 frame = talloc_stackframe();
1421
1422                 if (tevent_loop_once(winbind_event_context()) == -1) {
1423                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1424                                   strerror(errno)));
1425                         return 1;
1426                 }
1427
1428                 TALLOC_FREE(frame);
1429         }
1430
1431         return 0;
1432 }