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 "ntdomain.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         NTSTATUS status;
 383
 384         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 385                    "message.\n"));
 386
 387         /*
 388          * call the validation code from a child:
 389          * so we don't block the main winbindd and the validation
 390          * code can safely use fork/waitpid...
 391          */
 392         child_pid = sys_fork();
 393
 394         if (child_pid == -1) {
 395                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 396                           strerror(errno)));
 397                 return;
 398         }
 399
 400         if (child_pid != 0) {
 401                 /* parent */
 402                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 403                           "pid %d.\n", (int)child_pid));
 404                 return;
 405         }
 406
 407         /* child */
 408
 409         status = winbindd_reinit_after_fork(NULL, NULL);
 410         if (!NT_STATUS_IS_OK(status)) {
 411                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 412                           nt_errstr(status)));
 413                 _exit(0);
 414         }
 415
 416         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 417         CatchSignal(SIGCHLD, SIG_DFL);
 418
 419         ret = (uint8)winbindd_validate_cache_nobackup();
 420         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 421         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 422                            (size_t)1);
 423         _exit(0);
 424 }
 425
 426 static struct winbindd_dispatch_table {
 427         enum winbindd_cmd cmd;
 428         void (*fn)(struct winbindd_cli_state *state);
 429         const char *winbindd_cmd_name;
 430 } dispatch_table[] = {
 431
 432         /* Enumeration functions */
 433
 434         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 435           "LIST_TRUSTDOM" },
 436
 437         /* Miscellaneous */
 438
 439         { WINBINDD_INFO, winbindd_info, "INFO" },
 440         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 441           "INTERFACE_VERSION" },
 442         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 443         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 444         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 445         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 446         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 447           "WINBINDD_PRIV_PIPE_DIR" },
 448
 449         /* Credential cache access */
 450         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 451         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 452
 453         /* WINS functions */
 454
 455         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 456         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 457
 458         /* End of list */
 459
 460         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 461 };
 462
 463 struct winbindd_async_dispatch_table {
 464         enum winbindd_cmd cmd;
 465         const char *cmd_name;
 466         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 467                                        struct tevent_context *ev,
 468                                        struct winbindd_cli_state *cli,
 469                                        struct winbindd_request *request);
 470         NTSTATUS (*recv_req)(struct tevent_req *req,
 471                              struct winbindd_response *presp);
 472 };
 473
 474 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 475         { WINBINDD_PING, "PING",
 476           wb_ping_send, wb_ping_recv },
 477         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 478           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 479         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 480           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 481         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 482           winbindd_lookupname_send, winbindd_lookupname_recv },
 483         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 484           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 485         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 486           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 487         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 488           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 489         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 490           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 491         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 492           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 493         { WINBINDD_GETPWSID, "GETPWSID",
 494           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 495         { WINBINDD_GETPWNAM, "GETPWNAM",
 496           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 497         { WINBINDD_GETPWUID, "GETPWUID",
 498           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 499         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 500           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 501         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 502           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 503         { WINBINDD_GETGROUPS, "GETGROUPS",
 504           winbindd_getgroups_send, winbindd_getgroups_recv },
 505         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 506           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 507         { WINBINDD_GETGRGID, "GETGRGID",
 508           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 509         { WINBINDD_GETGRNAM, "GETGRNAM",
 510           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 511         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 512           winbindd_getusersids_send, winbindd_getusersids_recv },
 513         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 514           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 515         { WINBINDD_SETPWENT, "SETPWENT",
 516           winbindd_setpwent_send, winbindd_setpwent_recv },
 517         { WINBINDD_GETPWENT, "GETPWENT",
 518           winbindd_getpwent_send, winbindd_getpwent_recv },
 519         { WINBINDD_ENDPWENT, "ENDPWENT",
 520           winbindd_endpwent_send, winbindd_endpwent_recv },
 521         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 522           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 523         { WINBINDD_GETDCNAME, "GETDCNAME",
 524           winbindd_getdcname_send, winbindd_getdcname_recv },
 525         { WINBINDD_SETGRENT, "SETGRENT",
 526           winbindd_setgrent_send, winbindd_setgrent_recv },
 527         { WINBINDD_GETGRENT, "GETGRENT",
 528           winbindd_getgrent_send, winbindd_getgrent_recv },
 529         { WINBINDD_ENDGRENT, "ENDGRENT",
 530           winbindd_endgrent_send, winbindd_endgrent_recv },
 531         { WINBINDD_LIST_USERS, "LIST_USERS",
 532           winbindd_list_users_send, winbindd_list_users_recv },
 533         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 534           winbindd_list_groups_send, winbindd_list_groups_recv },
 535         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 536           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 537         { WINBINDD_PING_DC, "PING_DC",
 538           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 539         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 540           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 541         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 542           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 543         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 544           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 545         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 546           winbindd_pam_chng_pswd_auth_crap_send,
 547           winbindd_pam_chng_pswd_auth_crap_recv },
 548
 549         { 0, NULL, NULL, NULL }
 550 };
 551
 552 static struct winbindd_async_dispatch_table async_priv_table[] = {
 553         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 554           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 555         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 556           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 557         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 558           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 559         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 560           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 561
 562         { 0, NULL, NULL, NULL }
 563 };
 564
 565 static void wb_request_done(struct tevent_req *req);
 566
 567 static void process_request(struct winbindd_cli_state *state)
 568 {
 569         struct winbindd_dispatch_table *table = dispatch_table;
 570         struct winbindd_async_dispatch_table *atable;
 571
 572         state->mem_ctx = talloc_named(state, 0, "winbind request");
 573         if (state->mem_ctx == NULL)
 574                 return;
 575
 576         /* Remember who asked us. */
 577         state->pid = state->request->pid;
 578
 579         state->cmd_name = "unknown request";
 580         state->recv_fn = NULL;
 581
 582         /* Process command */
 583
 584         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 585                 if (state->request->cmd == atable->cmd) {
 586                         break;
 587                 }
 588         }
 589
 590         if ((atable->send_req == NULL) && state->privileged) {
 591                 for (atable = async_priv_table; atable->send_req;
 592                      atable += 1) {
 593                         if (state->request->cmd == atable->cmd) {
 594                                 break;
 595                         }
 596                 }
 597         }
 598
 599         if (atable->send_req != NULL) {
 600                 struct tevent_req *req;
 601
 602                 state->cmd_name = atable->cmd_name;
 603                 state->recv_fn = atable->recv_req;
 604
 605                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 606                            (int)state->pid, state->cmd_name));
 607
 608                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 609                                        state, state->request);
 610                 if (req == NULL) {
 611                         DEBUG(0, ("process_request: atable->send failed for "
 612                                   "%s\n", atable->cmd_name));
 613                         request_error(state);
 614                         return;
 615                 }
 616                 tevent_req_set_callback(req, wb_request_done, state);
 617                 return;
 618         }
 619
 620         state->response = talloc_zero(state->mem_ctx,
 621                                       struct winbindd_response);
 622         if (state->response == NULL) {
 623                 DEBUG(10, ("talloc failed\n"));
 624                 remove_client(state);
 625                 return;
 626         }
 627         state->response->result = WINBINDD_PENDING;
 628         state->response->length = sizeof(struct winbindd_response);
 629
 630         for (table = dispatch_table; table->fn; table++) {
 631                 if (state->request->cmd == table->cmd) {
 632                         DEBUG(10,("process_request: request fn %s\n",
 633                                   table->winbindd_cmd_name ));
 634                         state->cmd_name = table->winbindd_cmd_name;
 635                         table->fn(state);
 636                         break;
 637                 }
 638         }
 639
 640         if (!table->fn) {
 641                 DEBUG(10,("process_request: unknown request fn number %d\n",
 642                           (int)state->request->cmd ));
 643                 request_error(state);
 644         }
 645 }
 646
 647 static void wb_request_done(struct tevent_req *req)
 648 {
 649         struct winbindd_cli_state *state = tevent_req_callback_data(
 650                 req, struct winbindd_cli_state);
 651         NTSTATUS status;
 652
 653         state->response = talloc_zero(state->mem_ctx,
 654                                       struct winbindd_response);
 655         if (state->response == NULL) {
 656                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 657                           (int)state->pid, state->cmd_name));
 658                 remove_client(state);
 659                 return;
 660         }
 661         state->response->result = WINBINDD_PENDING;
 662         state->response->length = sizeof(struct winbindd_response);
 663
 664         status = state->recv_fn(req, state->response);
 665         TALLOC_FREE(req);
 666
 667         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 668                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 669
 670         if (!NT_STATUS_IS_OK(status)) {
 671                 request_error(state);
 672                 return;
 673         }
 674         request_ok(state);
 675 }
 676
 677 /*
 678  * This is the main event loop of winbind requests. It goes through a
 679  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 680  *
 681  * An idle winbind client has a read request of 4 bytes outstanding,
 682  * finalizing function is request_len_recv, checking the length. request_recv
 683  * then processes the packet. The processing function then at some point has
 684  * to call request_finished which schedules sending the response.
 685  */
 686
 687 static void request_finished(struct winbindd_cli_state *state);
 688
 689 static void winbind_client_request_read(struct tevent_req *req);
 690 static void winbind_client_response_written(struct tevent_req *req);
 691
 692 static void request_finished(struct winbindd_cli_state *state)
 693 {
 694         struct tevent_req *req;
 695
 696         TALLOC_FREE(state->request);
 697
 698         req = wb_resp_write_send(state, winbind_event_context(),
 699                                  state->out_queue, state->sock,
 700                                  state->response);
 701         if (req == NULL) {
 702                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 703                           (int)state->pid, state->cmd_name));
 704                 remove_client(state);
 705                 return;
 706         }
 707         tevent_req_set_callback(req, winbind_client_response_written, state);
 708 }
 709
 710 static void winbind_client_response_written(struct tevent_req *req)
 711 {
 712         struct winbindd_cli_state *state = tevent_req_callback_data(
 713                 req, struct winbindd_cli_state);
 714         ssize_t ret;
 715         int err;
 716
 717         ret = wb_resp_write_recv(req, &err);
 718         TALLOC_FREE(req);
 719         if (ret == -1) {
 720                 close(state->sock);
 721                 state->sock = -1;
 722                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 723                           (int)state->pid, state->cmd_name, strerror(err)));
 724                 remove_client(state);
 725                 return;
 726         }
 727
 728         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 729                   "to client\n", (int)state->pid, state->cmd_name));
 730
 731         TALLOC_FREE(state->mem_ctx);
 732         state->response = NULL;
 733         state->cmd_name = "no request";
 734         state->recv_fn = NULL;
 735
 736         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 737                                WINBINDD_MAX_EXTRA_DATA);
 738         if (req == NULL) {
 739                 remove_client(state);
 740                 return;
 741         }
 742         tevent_req_set_callback(req, winbind_client_request_read, state);
 743 }
 744
 745 void request_error(struct winbindd_cli_state *state)
 746 {
 747         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 748         state->response->result = WINBINDD_ERROR;
 749         request_finished(state);
 750 }
 751
 752 void request_ok(struct winbindd_cli_state *state)
 753 {
 754         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 755         state->response->result = WINBINDD_OK;
 756         request_finished(state);
 757 }
 758
 759 /* Process a new connection by adding it to the client connection list */
 760
 761 static void new_connection(int listen_sock, bool privileged)
 762 {
 763         struct sockaddr_un sunaddr;
 764         struct winbindd_cli_state *state;
 765         struct tevent_req *req;
 766         socklen_t len;
 767         int sock;
 768
 769         /* Accept connection */
 770
 771         len = sizeof(sunaddr);
 772
 773         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 774
 775         if (sock == -1) {
 776                 if (errno != EINTR) {
 777                         DEBUG(0, ("Faild to accept socket - %s\n",
 778                                   strerror(errno)));
 779                 }
 780                 return;
 781         }
 782
 783         DEBUG(6,("accepted socket %d\n", sock));
 784
 785         /* Create new connection structure */
 786
 787         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 788                 close(sock);
 789                 return;
 790         }
 791
 792         state->sock = sock;
 793
 794         state->out_queue = tevent_queue_create(state, "winbind client reply");
 795         if (state->out_queue == NULL) {
 796                 close(sock);
 797                 TALLOC_FREE(state);
 798                 return;
 799         }
 800
 801         state->last_access = time(NULL);
 802
 803         state->privileged = privileged;
 804
 805         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 806                                WINBINDD_MAX_EXTRA_DATA);
 807         if (req == NULL) {
 808                 TALLOC_FREE(state);
 809                 close(sock);
 810                 return;
 811         }
 812         tevent_req_set_callback(req, winbind_client_request_read, state);
 813
 814         /* Add to connection list */
 815
 816         winbindd_add_client(state);
 817 }
 818
 819 static void winbind_client_request_read(struct tevent_req *req)
 820 {
 821         struct winbindd_cli_state *state = tevent_req_callback_data(
 822                 req, struct winbindd_cli_state);
 823         ssize_t ret;
 824         int err;
 825
 826         ret = wb_req_read_recv(req, state, &state->request, &err);
 827         TALLOC_FREE(req);
 828         if (ret == -1) {
 829                 if (err == EPIPE) {
 830                         DEBUG(6, ("closing socket %d, client exited\n",
 831                                   state->sock));
 832                 } else {
 833                         DEBUG(2, ("Could not read client request from fd %d: "
 834                                   "%s\n", state->sock, strerror(err)));
 835                 }
 836                 close(state->sock);
 837                 state->sock = -1;
 838                 remove_client(state);
 839                 return;
 840         }
 841         process_request(state);
 842 }
 843
 844 /* Remove a client connection from client connection list */
 845
 846 static void remove_client(struct winbindd_cli_state *state)
 847 {
 848         char c = 0;
 849         int nwritten;
 850
 851         /* It's a dead client - hold a funeral */
 852
 853         if (state == NULL) {
 854                 return;
 855         }
 856
 857         if (state->sock != -1) {
 858                 /* tell client, we are closing ... */
 859                 nwritten = write(state->sock, &c, sizeof(c));
 860                 if (nwritten == -1) {
 861                         DEBUG(2, ("final write to client failed: %s\n",
 862                                 strerror(errno)));
 863                 }
 864
 865                 /* Close socket */
 866
 867                 close(state->sock);
 868                 state->sock = -1;
 869         }
 870
 871         TALLOC_FREE(state->mem_ctx);
 872
 873         /* Remove from list and free */
 874
 875         winbindd_remove_client(state);
 876         TALLOC_FREE(state);
 877 }
 878
 879 /* Is a client idle? */
 880
 881 static bool client_is_idle(struct winbindd_cli_state *state) {
 882   return (state->response == NULL &&
 883           !state->pwent_state && !state->grent_state);
 884 }
 885
 886 /* Shutdown client connection which has been idle for the longest time */
 887
 888 static bool remove_idle_client(void)
 889 {
 890         struct winbindd_cli_state *state, *remove_state = NULL;
 891         time_t last_access = 0;
 892         int nidle = 0;
 893
 894         for (state = winbindd_client_list(); state; state = state->next) {
 895                 if (client_is_idle(state)) {
 896                         nidle++;
 897                         if (!last_access || state->last_access < last_access) {
 898                                 last_access = state->last_access;
 899                                 remove_state = state;
 900                         }
 901                 }
 902         }
 903
 904         if (remove_state) {
 905                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 906                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 907                 remove_client(remove_state);
 908                 return True;
 909         }
 910
 911         return False;
 912 }
 913
 914 struct winbindd_listen_state {
 915         bool privileged;
 916         int fd;
 917 };
 918
 919 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 920                                         struct tevent_fd *fde,
 921                                         uint16_t flags,
 922                                         void *private_data)
 923 {
 924         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 925                                           struct winbindd_listen_state);
 926
 927         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 928                 DEBUG(5,("winbindd: Exceeding %d client "
 929                          "connections, removing idle "
 930                          "connection.\n", lp_winbind_max_clients()));
 931                 if (!remove_idle_client()) {
 932                         DEBUG(0,("winbindd: Exceeding %d "
 933                                  "client connections, no idle "
 934                                  "connection found\n",
 935                                  lp_winbind_max_clients()));
 936                         break;
 937                 }
 938         }
 939         new_connection(s->fd, s->privileged);
 940 }
 941
 942 /*
 943  * Winbindd socket accessor functions
 944  */
 945
 946 const char *get_winbind_pipe_dir(void)
 947 {
 948         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 949 }
 950
 951 char *get_winbind_priv_pipe_dir(void)
 952 {
 953         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 954 }
 955
 956 static bool winbindd_setup_listeners(void)
 957 {
 958         struct winbindd_listen_state *pub_state = NULL;
 959         struct winbindd_listen_state *priv_state = NULL;
 960         struct tevent_fd *fde;
 961
 962         pub_state = talloc(winbind_event_context(),
 963                            struct winbindd_listen_state);
 964         if (!pub_state) {
 965                 goto failed;
 966         }
 967
 968         pub_state->privileged = false;
 969         pub_state->fd = create_pipe_sock(
 970                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 971         if (pub_state->fd == -1) {
 972                 goto failed;
 973         }
 974
 975         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 976                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 977                             pub_state);
 978         if (fde == NULL) {
 979                 close(pub_state->fd);
 980                 goto failed;
 981         }
 982         tevent_fd_set_auto_close(fde);
 983
 984         priv_state = talloc(winbind_event_context(),
 985                             struct winbindd_listen_state);
 986         if (!priv_state) {
 987                 goto failed;
 988         }
 989
 990         priv_state->privileged = true;
 991         priv_state->fd = create_pipe_sock(
 992                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 993         if (priv_state->fd == -1) {
 994                 goto failed;
 995         }
 996
 997         fde = tevent_add_fd(winbind_event_context(), priv_state,
 998                             priv_state->fd, TEVENT_FD_READ,
 999                             winbindd_listen_fde_handler, priv_state);
1000         if (fde == NULL) {
1001                 close(priv_state->fd);
1002                 goto failed;
1003         }
1004         tevent_fd_set_auto_close(fde);
1005
1006         return true;
1007 failed:
1008         TALLOC_FREE(pub_state);
1009         TALLOC_FREE(priv_state);
1010         return false;
1011 }
1012
1013 bool winbindd_use_idmap_cache(void)
1014 {
1015         return !opt_nocache;
1016 }
1017
1018 bool winbindd_use_cache(void)
1019 {
1020         return !opt_nocache;
1021 }
1022
1023 void winbindd_register_handlers(void)
1024 {
1025         /* Setup signal handlers */
1026
1027         if (!winbindd_setup_sig_term_handler(true))
1028                 exit(1);
1029         if (!winbindd_setup_sig_hup_handler(NULL))
1030                 exit(1);
1031         if (!winbindd_setup_sig_chld_handler())
1032                 exit(1);
1033         if (!winbindd_setup_sig_usr2_handler())
1034                 exit(1);
1035
1036         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1037
1038         /*
1039          * Ensure all cache and idmap caches are consistent
1040          * and initialized before we startup.
1041          */
1042         if (!winbindd_cache_validate_and_initialize()) {
1043                 exit(1);
1044         }
1045
1046         /* get broadcast messages */
1047
1048         if (!serverid_register(procid_self(),
1049                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1050                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1051                 exit(1);
1052         }
1053
1054         /* React on 'smbcontrol winbindd reload-config' in the same way
1055            as to SIGHUP signal */
1056         messaging_register(winbind_messaging_context(), NULL,
1057                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1058         messaging_register(winbind_messaging_context(), NULL,
1059                            MSG_SHUTDOWN, msg_shutdown);
1060
1061         /* Handle online/offline messages. */
1062         messaging_register(winbind_messaging_context(), NULL,
1063                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1064         messaging_register(winbind_messaging_context(), NULL,
1065                            MSG_WINBIND_ONLINE, winbind_msg_online);
1066         messaging_register(winbind_messaging_context(), NULL,
1067                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1068
1069         messaging_register(winbind_messaging_context(), NULL,
1070                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1071
1072         messaging_register(winbind_messaging_context(), NULL,
1073                            MSG_WINBIND_VALIDATE_CACHE,
1074                            winbind_msg_validate_cache);
1075
1076         messaging_register(winbind_messaging_context(), NULL,
1077                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1078                            winbind_msg_dump_domain_list);
1079
1080         messaging_register(winbind_messaging_context(), NULL,
1081                            MSG_WINBIND_IP_DROPPED,
1082                            winbind_msg_ip_dropped_parent);
1083
1084         /* Register handler for MSG_DEBUG. */
1085         messaging_register(winbind_messaging_context(), NULL,
1086                            MSG_DEBUG,
1087                            winbind_msg_debug);
1088
1089         netsamlogon_cache_init(); /* Non-critical */
1090
1091         /* clear the cached list of trusted domains */
1092
1093         wcache_tdc_clear();
1094
1095         if (!init_domain_list()) {
1096                 DEBUG(0,("unable to initialize domain list\n"));
1097                 exit(1);
1098         }
1099
1100         init_idmap_child();
1101         init_locator_child();
1102
1103         smb_nscd_flush_user_cache();
1104         smb_nscd_flush_group_cache();
1105
1106         if (lp_allow_trusted_domains()) {
1107                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1108                               rescan_trusted_domains, NULL) == NULL) {
1109                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1110                         exit(1);
1111                 }
1112         }
1113
1114 }
1115
1116 struct winbindd_addrchanged_state {
1117         struct addrchange_context *ctx;
1118         struct tevent_context *ev;
1119         struct messaging_context *msg_ctx;
1120 };
1121
1122 static void winbindd_addr_changed(struct tevent_req *req);
1123
1124 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1125                                      struct tevent_context *ev,
1126                                      struct messaging_context *msg_ctx)
1127 {
1128         struct winbindd_addrchanged_state *state;
1129         struct tevent_req *req;
1130         NTSTATUS status;
1131
1132         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1133         if (state == NULL) {
1134                 DEBUG(10, ("talloc failed\n"));
1135                 return;
1136         }
1137         state->ev = ev;
1138         state->msg_ctx = msg_ctx;
1139
1140         status = addrchange_context_create(state, &state->ctx);
1141         if (!NT_STATUS_IS_OK(status)) {
1142                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1143                            nt_errstr(status)));
1144                 TALLOC_FREE(state);
1145                 return;
1146         }
1147         req = addrchange_send(state, ev, state->ctx);
1148         if (req == NULL) {
1149                 DEBUG(0, ("addrchange_send failed\n"));
1150                 TALLOC_FREE(state);
1151                 return;
1152         }
1153         tevent_req_set_callback(req, winbindd_addr_changed, state);
1154 }
1155
1156 static void winbindd_addr_changed(struct tevent_req *req)
1157 {
1158         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1159                 req, struct winbindd_addrchanged_state);
1160         enum addrchange_type type;
1161         struct sockaddr_storage addr;
1162         NTSTATUS status;
1163
1164         status = addrchange_recv(req, &type, &addr);
1165         TALLOC_FREE(req);
1166         if (!NT_STATUS_IS_OK(status)) {
1167                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1168                            nt_errstr(status)));
1169                 TALLOC_FREE(state);
1170                 return;
1171         }
1172         if (type == ADDRCHANGE_DEL) {
1173                 char addrstr[INET6_ADDRSTRLEN];
1174                 DATA_BLOB blob;
1175
1176                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1177
1178                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1179                           addrstr));
1180
1181                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1182
1183                 status = messaging_send(state->msg_ctx,
1184                                         messaging_server_id(state->msg_ctx),
1185                                         MSG_WINBIND_IP_DROPPED, &blob);
1186                 if (!NT_STATUS_IS_OK(status)) {
1187                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1188                                    nt_errstr(status)));
1189                 }
1190         }
1191         req = addrchange_send(state, state->ev, state->ctx);
1192         if (req == NULL) {
1193                 DEBUG(0, ("addrchange_send failed\n"));
1194                 TALLOC_FREE(state);
1195                 return;
1196         }
1197         tevent_req_set_callback(req, winbindd_addr_changed, state);
1198 }
1199
1200 /* Main function */
1201
1202 int main(int argc, char **argv, char **envp)
1203 {
1204         static bool is_daemon = False;
1205         static bool Fork = True;
1206         static bool log_stdout = False;
1207         static bool no_process_group = False;
1208         enum {
1209                 OPT_DAEMON = 1000,
1210                 OPT_FORK,
1211                 OPT_NO_PROCESS_GROUP,
1212                 OPT_LOG_STDOUT
1213         };
1214         struct poptOption long_options[] = {
1215                 POPT_AUTOHELP
1216                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1217                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1218                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1219                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1220                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1221                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1222                 POPT_COMMON_SAMBA
1223                 POPT_TABLEEND
1224         };
1225         poptContext pc;
1226         int opt;
1227         TALLOC_CTX *frame;
1228         NTSTATUS status;
1229
1230         /*
1231          * Do this before any other talloc operation
1232          */
1233         talloc_enable_null_tracking();
1234         frame = talloc_stackframe();
1235
1236         /* glibc (?) likes to print "User defined signal 1" and exit if a
1237            SIGUSR[12] is received before a handler is installed */
1238
1239         CatchSignal(SIGUSR1, SIG_IGN);
1240         CatchSignal(SIGUSR2, SIG_IGN);
1241
1242         fault_setup();
1243         dump_core_setup("winbindd", lp_logfile());
1244
1245         load_case_tables();
1246
1247         /* Initialise for running in non-root mode */
1248
1249         sec_init();
1250
1251         set_remote_machine_name("winbindd", False);
1252
1253         /* Set environment variable so we don't recursively call ourselves.
1254            This may also be useful interactively. */
1255
1256         if ( !winbind_off() ) {
1257                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1258                 exit(1);
1259         }
1260
1261         /* Initialise samba/rpc client stuff */
1262
1263         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1264
1265         while ((opt = poptGetNextOpt(pc)) != -1) {
1266                 switch (opt) {
1267                         /* Don't become a daemon */
1268                 case OPT_DAEMON:
1269                         is_daemon = True;
1270                         break;
1271                 case 'i':
1272                         interactive = True;
1273                         log_stdout = True;
1274                         Fork = False;
1275                         break;
1276                 case OPT_FORK:
1277                         Fork = false;
1278                         break;
1279                 case OPT_NO_PROCESS_GROUP:
1280                         no_process_group = true;
1281                         break;
1282                 case OPT_LOG_STDOUT:
1283                         log_stdout = true;
1284                         break;
1285                 case 'n':
1286                         opt_nocache = true;
1287                         break;
1288                 default:
1289                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1290                                   poptBadOption(pc, 0), poptStrerror(opt));
1291                         poptPrintUsage(pc, stderr, 0);
1292                         exit(1);
1293                 }
1294         }
1295
1296         if (is_daemon && interactive) {
1297                 d_fprintf(stderr,"\nERROR: "
1298                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1299                 poptPrintUsage(pc, stderr, 0);
1300                 exit(1);
1301         }
1302
1303         if (log_stdout && Fork) {
1304                 d_fprintf(stderr, "\nERROR: "
1305                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1306                 poptPrintUsage(pc, stderr, 0);
1307                 exit(1);
1308         }
1309
1310         poptFreeContext(pc);
1311
1312         if (!override_logfile) {
1313                 char *lfile = NULL;
1314                 if (asprintf(&lfile,"%s/log.winbindd",
1315                                 get_dyn_LOGFILEBASE()) > 0) {
1316                         lp_set_logfile(lfile);
1317                         SAFE_FREE(lfile);
1318                 }
1319         }
1320         if (log_stdout) {
1321                 setup_logging("winbindd", DEBUG_STDOUT);
1322         } else {
1323                 setup_logging("winbindd", DEBUG_FILE);
1324         }
1325         reopen_logs();
1326
1327         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1328         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1329
1330         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1331                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1332                 exit(1);
1333         }
1334
1335         /* Initialise messaging system */
1336
1337         if (winbind_messaging_context() == NULL) {
1338                 exit(1);
1339         }
1340
1341         if (!reload_services_file(NULL)) {
1342                 DEBUG(0, ("error opening config file\n"));
1343                 exit(1);
1344         }
1345
1346         if (!directory_exist(lp_lockdir())) {
1347                 mkdir(lp_lockdir(), 0755);
1348         }
1349
1350         /* Setup names. */
1351
1352         if (!init_names())
1353                 exit(1);
1354
1355         load_interfaces();
1356
1357         if (!secrets_init()) {
1358
1359                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1360                 return False;
1361         }
1362
1363         /* Unblock all signals we are interested in as they may have been
1364            blocked by the parent process. */
1365
1366         BlockSignals(False, SIGINT);
1367         BlockSignals(False, SIGQUIT);
1368         BlockSignals(False, SIGTERM);
1369         BlockSignals(False, SIGUSR1);
1370         BlockSignals(False, SIGUSR2);
1371         BlockSignals(False, SIGHUP);
1372         BlockSignals(False, SIGCHLD);
1373
1374         if (!interactive)
1375                 become_daemon(Fork, no_process_group, log_stdout);
1376
1377         pidfile_create("winbindd");
1378
1379 #if HAVE_SETPGID
1380         /*
1381          * If we're interactive we want to set our own process group for
1382          * signal management.
1383          */
1384         if (interactive && !no_process_group)
1385                 setpgid( (pid_t)0, (pid_t)0);
1386 #endif
1387
1388         TimeInit();
1389
1390         /* Don't use winbindd_reinit_after_fork here as
1391          * we're just starting up and haven't created any
1392          * winbindd-specific resources we must free yet. JRA.
1393          */
1394
1395         status = reinit_after_fork(winbind_messaging_context(),
1396                                    winbind_event_context(),
1397                                    procid_self(), false);
1398         if (!NT_STATUS_IS_OK(status)) {
1399                 DEBUG(0,("reinit_after_fork() failed\n"));
1400                 exit(1);
1401         }
1402
1403         winbindd_register_handlers();
1404
1405         status = init_system_info();
1406         if (!NT_STATUS_IS_OK(status)) {
1407                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1408                           nt_errstr(status)));
1409                 exit(1);
1410         }
1411
1412         rpc_lsarpc_init(NULL);
1413         rpc_samr_init(NULL);
1414
1415         winbindd_init_addrchange(NULL, winbind_event_context(),
1416                                  winbind_messaging_context());
1417
1418         /* setup listen sockets */
1419
1420         if (!winbindd_setup_listeners()) {
1421                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1422                 exit(1);
1423         }
1424
1425         TALLOC_FREE(frame);
1426         /* Loop waiting for requests */
1427         while (1) {
1428                 frame = talloc_stackframe();
1429
1430                 if (tevent_loop_once(winbind_event_context()) == -1) {
1431                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1432                                   strerror(errno)));
1433                         return 1;
1434                 }
1435
1436                 TALLOC_FREE(frame);
1437         }
1438
1439         return 0;
1440 }