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