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         /* End of list */
 454
 455         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 456 };
 457
 458 struct winbindd_async_dispatch_table {
 459         enum winbindd_cmd cmd;
 460         const char *cmd_name;
 461         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 462                                        struct tevent_context *ev,
 463                                        struct winbindd_cli_state *cli,
 464                                        struct winbindd_request *request);
 465         NTSTATUS (*recv_req)(struct tevent_req *req,
 466                              struct winbindd_response *presp);
 467 };
 468
 469 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 470         { WINBINDD_PING, "PING",
 471           wb_ping_send, wb_ping_recv },
 472         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 473           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 474         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 475           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 476         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 477           winbindd_lookupname_send, winbindd_lookupname_recv },
 478         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 479           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 480         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 481           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 482         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 483           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 484         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 485           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 486         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 487           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 488         { WINBINDD_GETPWSID, "GETPWSID",
 489           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 490         { WINBINDD_GETPWNAM, "GETPWNAM",
 491           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 492         { WINBINDD_GETPWUID, "GETPWUID",
 493           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 494         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 495           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 496         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 497           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 498         { WINBINDD_GETGROUPS, "GETGROUPS",
 499           winbindd_getgroups_send, winbindd_getgroups_recv },
 500         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 501           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 502         { WINBINDD_GETGRGID, "GETGRGID",
 503           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 504         { WINBINDD_GETGRNAM, "GETGRNAM",
 505           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 506         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 507           winbindd_getusersids_send, winbindd_getusersids_recv },
 508         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 509           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 510         { WINBINDD_SETPWENT, "SETPWENT",
 511           winbindd_setpwent_send, winbindd_setpwent_recv },
 512         { WINBINDD_GETPWENT, "GETPWENT",
 513           winbindd_getpwent_send, winbindd_getpwent_recv },
 514         { WINBINDD_ENDPWENT, "ENDPWENT",
 515           winbindd_endpwent_send, winbindd_endpwent_recv },
 516         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 517           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 518         { WINBINDD_GETDCNAME, "GETDCNAME",
 519           winbindd_getdcname_send, winbindd_getdcname_recv },
 520         { WINBINDD_SETGRENT, "SETGRENT",
 521           winbindd_setgrent_send, winbindd_setgrent_recv },
 522         { WINBINDD_GETGRENT, "GETGRENT",
 523           winbindd_getgrent_send, winbindd_getgrent_recv },
 524         { WINBINDD_ENDGRENT, "ENDGRENT",
 525           winbindd_endgrent_send, winbindd_endgrent_recv },
 526         { WINBINDD_LIST_USERS, "LIST_USERS",
 527           winbindd_list_users_send, winbindd_list_users_recv },
 528         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 529           winbindd_list_groups_send, winbindd_list_groups_recv },
 530         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 531           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 532         { WINBINDD_PING_DC, "PING_DC",
 533           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 534         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 535           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 536         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 537           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 538         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 539           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 540         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 541           winbindd_pam_chng_pswd_auth_crap_send,
 542           winbindd_pam_chng_pswd_auth_crap_recv },
 543         { WINBINDD_WINS_BYIP, "WINS_BYIP",
 544           winbindd_wins_byip_send, winbindd_wins_byip_recv },
 545         { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
 546           winbindd_wins_byname_send, winbindd_wins_byname_recv },
 547
 548         { 0, NULL, NULL, NULL }
 549 };
 550
 551 static struct winbindd_async_dispatch_table async_priv_table[] = {
 552         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 553           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 554         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 555           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 556         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 557           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 558         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 559           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 560
 561         { 0, NULL, NULL, NULL }
 562 };
 563
 564 static void wb_request_done(struct tevent_req *req);
 565
 566 static void process_request(struct winbindd_cli_state *state)
 567 {
 568         struct winbindd_dispatch_table *table = dispatch_table;
 569         struct winbindd_async_dispatch_table *atable;
 570
 571         state->mem_ctx = talloc_named(state, 0, "winbind request");
 572         if (state->mem_ctx == NULL)
 573                 return;
 574
 575         /* Remember who asked us. */
 576         state->pid = state->request->pid;
 577
 578         state->cmd_name = "unknown request";
 579         state->recv_fn = NULL;
 580
 581         /* Process command */
 582
 583         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 584                 if (state->request->cmd == atable->cmd) {
 585                         break;
 586                 }
 587         }
 588
 589         if ((atable->send_req == NULL) && state->privileged) {
 590                 for (atable = async_priv_table; atable->send_req;
 591                      atable += 1) {
 592                         if (state->request->cmd == atable->cmd) {
 593                                 break;
 594                         }
 595                 }
 596         }
 597
 598         if (atable->send_req != NULL) {
 599                 struct tevent_req *req;
 600
 601                 state->cmd_name = atable->cmd_name;
 602                 state->recv_fn = atable->recv_req;
 603
 604                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 605                            (int)state->pid, state->cmd_name));
 606
 607                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 608                                        state, state->request);
 609                 if (req == NULL) {
 610                         DEBUG(0, ("process_request: atable->send failed for "
 611                                   "%s\n", atable->cmd_name));
 612                         request_error(state);
 613                         return;
 614                 }
 615                 tevent_req_set_callback(req, wb_request_done, state);
 616                 return;
 617         }
 618
 619         state->response = talloc_zero(state->mem_ctx,
 620                                       struct winbindd_response);
 621         if (state->response == NULL) {
 622                 DEBUG(10, ("talloc failed\n"));
 623                 remove_client(state);
 624                 return;
 625         }
 626         state->response->result = WINBINDD_PENDING;
 627         state->response->length = sizeof(struct winbindd_response);
 628
 629         for (table = dispatch_table; table->fn; table++) {
 630                 if (state->request->cmd == table->cmd) {
 631                         DEBUG(10,("process_request: request fn %s\n",
 632                                   table->winbindd_cmd_name ));
 633                         state->cmd_name = table->winbindd_cmd_name;
 634                         table->fn(state);
 635                         break;
 636                 }
 637         }
 638
 639         if (!table->fn) {
 640                 DEBUG(10,("process_request: unknown request fn number %d\n",
 641                           (int)state->request->cmd ));
 642                 request_error(state);
 643         }
 644 }
 645
 646 static void wb_request_done(struct tevent_req *req)
 647 {
 648         struct winbindd_cli_state *state = tevent_req_callback_data(
 649                 req, struct winbindd_cli_state);
 650         NTSTATUS status;
 651
 652         state->response = talloc_zero(state->mem_ctx,
 653                                       struct winbindd_response);
 654         if (state->response == NULL) {
 655                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 656                           (int)state->pid, state->cmd_name));
 657                 remove_client(state);
 658                 return;
 659         }
 660         state->response->result = WINBINDD_PENDING;
 661         state->response->length = sizeof(struct winbindd_response);
 662
 663         status = state->recv_fn(req, state->response);
 664         TALLOC_FREE(req);
 665
 666         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 667                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 668
 669         if (!NT_STATUS_IS_OK(status)) {
 670                 request_error(state);
 671                 return;
 672         }
 673         request_ok(state);
 674 }
 675
 676 /*
 677  * This is the main event loop of winbind requests. It goes through a
 678  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 679  *
 680  * An idle winbind client has a read request of 4 bytes outstanding,
 681  * finalizing function is request_len_recv, checking the length. request_recv
 682  * then processes the packet. The processing function then at some point has
 683  * to call request_finished which schedules sending the response.
 684  */
 685
 686 static void request_finished(struct winbindd_cli_state *state);
 687
 688 static void winbind_client_request_read(struct tevent_req *req);
 689 static void winbind_client_response_written(struct tevent_req *req);
 690
 691 static void request_finished(struct winbindd_cli_state *state)
 692 {
 693         struct tevent_req *req;
 694
 695         TALLOC_FREE(state->request);
 696
 697         req = wb_resp_write_send(state, winbind_event_context(),
 698                                  state->out_queue, state->sock,
 699                                  state->response);
 700         if (req == NULL) {
 701                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 702                           (int)state->pid, state->cmd_name));
 703                 remove_client(state);
 704                 return;
 705         }
 706         tevent_req_set_callback(req, winbind_client_response_written, state);
 707 }
 708
 709 static void winbind_client_response_written(struct tevent_req *req)
 710 {
 711         struct winbindd_cli_state *state = tevent_req_callback_data(
 712                 req, struct winbindd_cli_state);
 713         ssize_t ret;
 714         int err;
 715
 716         ret = wb_resp_write_recv(req, &err);
 717         TALLOC_FREE(req);
 718         if (ret == -1) {
 719                 close(state->sock);
 720                 state->sock = -1;
 721                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 722                           (int)state->pid, state->cmd_name, strerror(err)));
 723                 remove_client(state);
 724                 return;
 725         }
 726
 727         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 728                   "to client\n", (int)state->pid, state->cmd_name));
 729
 730         TALLOC_FREE(state->mem_ctx);
 731         state->response = NULL;
 732         state->cmd_name = "no request";
 733         state->recv_fn = NULL;
 734
 735         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 736                                WINBINDD_MAX_EXTRA_DATA);
 737         if (req == NULL) {
 738                 remove_client(state);
 739                 return;
 740         }
 741         tevent_req_set_callback(req, winbind_client_request_read, state);
 742 }
 743
 744 void request_error(struct winbindd_cli_state *state)
 745 {
 746         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 747         state->response->result = WINBINDD_ERROR;
 748         request_finished(state);
 749 }
 750
 751 void request_ok(struct winbindd_cli_state *state)
 752 {
 753         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 754         state->response->result = WINBINDD_OK;
 755         request_finished(state);
 756 }
 757
 758 /* Process a new connection by adding it to the client connection list */
 759
 760 static void new_connection(int listen_sock, bool privileged)
 761 {
 762         struct sockaddr_un sunaddr;
 763         struct winbindd_cli_state *state;
 764         struct tevent_req *req;
 765         socklen_t len;
 766         int sock;
 767
 768         /* Accept connection */
 769
 770         len = sizeof(sunaddr);
 771
 772         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 773
 774         if (sock == -1) {
 775                 if (errno != EINTR) {
 776                         DEBUG(0, ("Faild to accept socket - %s\n",
 777                                   strerror(errno)));
 778                 }
 779                 return;
 780         }
 781
 782         DEBUG(6,("accepted socket %d\n", sock));
 783
 784         /* Create new connection structure */
 785
 786         if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
 787                 close(sock);
 788                 return;
 789         }
 790
 791         state->sock = sock;
 792
 793         state->out_queue = tevent_queue_create(state, "winbind client reply");
 794         if (state->out_queue == NULL) {
 795                 close(sock);
 796                 TALLOC_FREE(state);
 797                 return;
 798         }
 799
 800         state->last_access = time(NULL);
 801
 802         state->privileged = privileged;
 803
 804         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 805                                WINBINDD_MAX_EXTRA_DATA);
 806         if (req == NULL) {
 807                 TALLOC_FREE(state);
 808                 close(sock);
 809                 return;
 810         }
 811         tevent_req_set_callback(req, winbind_client_request_read, state);
 812
 813         /* Add to connection list */
 814
 815         winbindd_add_client(state);
 816 }
 817
 818 static void winbind_client_request_read(struct tevent_req *req)
 819 {
 820         struct winbindd_cli_state *state = tevent_req_callback_data(
 821                 req, struct winbindd_cli_state);
 822         ssize_t ret;
 823         int err;
 824
 825         ret = wb_req_read_recv(req, state, &state->request, &err);
 826         TALLOC_FREE(req);
 827         if (ret == -1) {
 828                 if (err == EPIPE) {
 829                         DEBUG(6, ("closing socket %d, client exited\n",
 830                                   state->sock));
 831                 } else {
 832                         DEBUG(2, ("Could not read client request from fd %d: "
 833                                   "%s\n", state->sock, strerror(err)));
 834                 }
 835                 close(state->sock);
 836                 state->sock = -1;
 837                 remove_client(state);
 838                 return;
 839         }
 840         process_request(state);
 841 }
 842
 843 /* Remove a client connection from client connection list */
 844
 845 static void remove_client(struct winbindd_cli_state *state)
 846 {
 847         char c = 0;
 848         int nwritten;
 849
 850         /* It's a dead client - hold a funeral */
 851
 852         if (state == NULL) {
 853                 return;
 854         }
 855
 856         if (state->sock != -1) {
 857                 /* tell client, we are closing ... */
 858                 nwritten = write(state->sock, &c, sizeof(c));
 859                 if (nwritten == -1) {
 860                         DEBUG(2, ("final write to client failed: %s\n",
 861                                 strerror(errno)));
 862                 }
 863
 864                 /* Close socket */
 865
 866                 close(state->sock);
 867                 state->sock = -1;
 868         }
 869
 870         TALLOC_FREE(state->mem_ctx);
 871
 872         /* Remove from list and free */
 873
 874         winbindd_remove_client(state);
 875         TALLOC_FREE(state);
 876 }
 877
 878 /* Is a client idle? */
 879
 880 static bool client_is_idle(struct winbindd_cli_state *state) {
 881   return (state->response == NULL &&
 882           !state->pwent_state && !state->grent_state);
 883 }
 884
 885 /* Shutdown client connection which has been idle for the longest time */
 886
 887 static bool remove_idle_client(void)
 888 {
 889         struct winbindd_cli_state *state, *remove_state = NULL;
 890         time_t last_access = 0;
 891         int nidle = 0;
 892
 893         for (state = winbindd_client_list(); state; state = state->next) {
 894                 if (client_is_idle(state)) {
 895                         nidle++;
 896                         if (!last_access || state->last_access < last_access) {
 897                                 last_access = state->last_access;
 898                                 remove_state = state;
 899                         }
 900                 }
 901         }
 902
 903         if (remove_state) {
 904                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 905                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 906                 remove_client(remove_state);
 907                 return True;
 908         }
 909
 910         return False;
 911 }
 912
 913 struct winbindd_listen_state {
 914         bool privileged;
 915         int fd;
 916 };
 917
 918 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 919                                         struct tevent_fd *fde,
 920                                         uint16_t flags,
 921                                         void *private_data)
 922 {
 923         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 924                                           struct winbindd_listen_state);
 925
 926         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 927                 DEBUG(5,("winbindd: Exceeding %d client "
 928                          "connections, removing idle "
 929                          "connection.\n", lp_winbind_max_clients()));
 930                 if (!remove_idle_client()) {
 931                         DEBUG(0,("winbindd: Exceeding %d "
 932                                  "client connections, no idle "
 933                                  "connection found\n",
 934                                  lp_winbind_max_clients()));
 935                         break;
 936                 }
 937         }
 938         new_connection(s->fd, s->privileged);
 939 }
 940
 941 /*
 942  * Winbindd socket accessor functions
 943  */
 944
 945 const char *get_winbind_pipe_dir(void)
 946 {
 947         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 948 }
 949
 950 char *get_winbind_priv_pipe_dir(void)
 951 {
 952         return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 953 }
 954
 955 static bool winbindd_setup_listeners(void)
 956 {
 957         struct winbindd_listen_state *pub_state = NULL;
 958         struct winbindd_listen_state *priv_state = NULL;
 959         struct tevent_fd *fde;
 960
 961         pub_state = talloc(winbind_event_context(),
 962                            struct winbindd_listen_state);
 963         if (!pub_state) {
 964                 goto failed;
 965         }
 966
 967         pub_state->privileged = false;
 968         pub_state->fd = create_pipe_sock(
 969                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 970         if (pub_state->fd == -1) {
 971                 goto failed;
 972         }
 973
 974         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 975                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 976                             pub_state);
 977         if (fde == NULL) {
 978                 close(pub_state->fd);
 979                 goto failed;
 980         }
 981         tevent_fd_set_auto_close(fde);
 982
 983         priv_state = talloc(winbind_event_context(),
 984                             struct winbindd_listen_state);
 985         if (!priv_state) {
 986                 goto failed;
 987         }
 988
 989         priv_state->privileged = true;
 990         priv_state->fd = create_pipe_sock(
 991                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 992         if (priv_state->fd == -1) {
 993                 goto failed;
 994         }
 995
 996         fde = tevent_add_fd(winbind_event_context(), priv_state,
 997                             priv_state->fd, TEVENT_FD_READ,
 998                             winbindd_listen_fde_handler, priv_state);
 999         if (fde == NULL) {
1000                 close(priv_state->fd);
1001                 goto failed;
1002         }
1003         tevent_fd_set_auto_close(fde);
1004
1005         return true;
1006 failed:
1007         TALLOC_FREE(pub_state);
1008         TALLOC_FREE(priv_state);
1009         return false;
1010 }
1011
1012 bool winbindd_use_idmap_cache(void)
1013 {
1014         return !opt_nocache;
1015 }
1016
1017 bool winbindd_use_cache(void)
1018 {
1019         return !opt_nocache;
1020 }
1021
1022 void winbindd_register_handlers(void)
1023 {
1024         /* Setup signal handlers */
1025
1026         if (!winbindd_setup_sig_term_handler(true))
1027                 exit(1);
1028         if (!winbindd_setup_sig_hup_handler(NULL))
1029                 exit(1);
1030         if (!winbindd_setup_sig_chld_handler())
1031                 exit(1);
1032         if (!winbindd_setup_sig_usr2_handler())
1033                 exit(1);
1034
1035         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1036
1037         /*
1038          * Ensure all cache and idmap caches are consistent
1039          * and initialized before we startup.
1040          */
1041         if (!winbindd_cache_validate_and_initialize()) {
1042                 exit(1);
1043         }
1044
1045         /* get broadcast messages */
1046
1047         if (!serverid_register(procid_self(),
1048                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1049                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1050                 exit(1);
1051         }
1052
1053         /* React on 'smbcontrol winbindd reload-config' in the same way
1054            as to SIGHUP signal */
1055         messaging_register(winbind_messaging_context(), NULL,
1056                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1057         messaging_register(winbind_messaging_context(), NULL,
1058                            MSG_SHUTDOWN, msg_shutdown);
1059
1060         /* Handle online/offline messages. */
1061         messaging_register(winbind_messaging_context(), NULL,
1062                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1063         messaging_register(winbind_messaging_context(), NULL,
1064                            MSG_WINBIND_ONLINE, winbind_msg_online);
1065         messaging_register(winbind_messaging_context(), NULL,
1066                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1067
1068         messaging_register(winbind_messaging_context(), NULL,
1069                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1070
1071         messaging_register(winbind_messaging_context(), NULL,
1072                            MSG_WINBIND_VALIDATE_CACHE,
1073                            winbind_msg_validate_cache);
1074
1075         messaging_register(winbind_messaging_context(), NULL,
1076                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1077                            winbind_msg_dump_domain_list);
1078
1079         messaging_register(winbind_messaging_context(), NULL,
1080                            MSG_WINBIND_IP_DROPPED,
1081                            winbind_msg_ip_dropped_parent);
1082
1083         /* Register handler for MSG_DEBUG. */
1084         messaging_register(winbind_messaging_context(), NULL,
1085                            MSG_DEBUG,
1086                            winbind_msg_debug);
1087
1088         netsamlogon_cache_init(); /* Non-critical */
1089
1090         /* clear the cached list of trusted domains */
1091
1092         wcache_tdc_clear();
1093
1094         if (!init_domain_list()) {
1095                 DEBUG(0,("unable to initialize domain list\n"));
1096                 exit(1);
1097         }
1098
1099         init_idmap_child();
1100         init_locator_child();
1101
1102         smb_nscd_flush_user_cache();
1103         smb_nscd_flush_group_cache();
1104
1105         if (lp_allow_trusted_domains()) {
1106                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1107                               rescan_trusted_domains, NULL) == NULL) {
1108                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1109                         exit(1);
1110                 }
1111         }
1112
1113 }
1114
1115 struct winbindd_addrchanged_state {
1116         struct addrchange_context *ctx;
1117         struct tevent_context *ev;
1118         struct messaging_context *msg_ctx;
1119 };
1120
1121 static void winbindd_addr_changed(struct tevent_req *req);
1122
1123 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1124                                      struct tevent_context *ev,
1125                                      struct messaging_context *msg_ctx)
1126 {
1127         struct winbindd_addrchanged_state *state;
1128         struct tevent_req *req;
1129         NTSTATUS status;
1130
1131         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1132         if (state == NULL) {
1133                 DEBUG(10, ("talloc failed\n"));
1134                 return;
1135         }
1136         state->ev = ev;
1137         state->msg_ctx = msg_ctx;
1138
1139         status = addrchange_context_create(state, &state->ctx);
1140         if (!NT_STATUS_IS_OK(status)) {
1141                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1142                            nt_errstr(status)));
1143                 TALLOC_FREE(state);
1144                 return;
1145         }
1146         req = addrchange_send(state, ev, state->ctx);
1147         if (req == NULL) {
1148                 DEBUG(0, ("addrchange_send failed\n"));
1149                 TALLOC_FREE(state);
1150                 return;
1151         }
1152         tevent_req_set_callback(req, winbindd_addr_changed, state);
1153 }
1154
1155 static void winbindd_addr_changed(struct tevent_req *req)
1156 {
1157         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1158                 req, struct winbindd_addrchanged_state);
1159         enum addrchange_type type;
1160         struct sockaddr_storage addr;
1161         NTSTATUS status;
1162
1163         status = addrchange_recv(req, &type, &addr);
1164         TALLOC_FREE(req);
1165         if (!NT_STATUS_IS_OK(status)) {
1166                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1167                            nt_errstr(status)));
1168                 TALLOC_FREE(state);
1169                 return;
1170         }
1171         if (type == ADDRCHANGE_DEL) {
1172                 char addrstr[INET6_ADDRSTRLEN];
1173                 DATA_BLOB blob;
1174
1175                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1176
1177                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1178                           addrstr));
1179
1180                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1181
1182                 status = messaging_send(state->msg_ctx,
1183                                         messaging_server_id(state->msg_ctx),
1184                                         MSG_WINBIND_IP_DROPPED, &blob);
1185                 if (!NT_STATUS_IS_OK(status)) {
1186                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1187                                    nt_errstr(status)));
1188                 }
1189         }
1190         req = addrchange_send(state, state->ev, state->ctx);
1191         if (req == NULL) {
1192                 DEBUG(0, ("addrchange_send failed\n"));
1193                 TALLOC_FREE(state);
1194                 return;
1195         }
1196         tevent_req_set_callback(req, winbindd_addr_changed, state);
1197 }
1198
1199 /* Main function */
1200
1201 int main(int argc, char **argv, char **envp)
1202 {
1203         static bool is_daemon = False;
1204         static bool Fork = True;
1205         static bool log_stdout = False;
1206         static bool no_process_group = False;
1207         enum {
1208                 OPT_DAEMON = 1000,
1209                 OPT_FORK,
1210                 OPT_NO_PROCESS_GROUP,
1211                 OPT_LOG_STDOUT
1212         };
1213         struct poptOption long_options[] = {
1214                 POPT_AUTOHELP
1215                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1216                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1217                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1218                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1219                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1220                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1221                 POPT_COMMON_SAMBA
1222                 POPT_TABLEEND
1223         };
1224         poptContext pc;
1225         int opt;
1226         TALLOC_CTX *frame;
1227         NTSTATUS status;
1228
1229         /*
1230          * Do this before any other talloc operation
1231          */
1232         talloc_enable_null_tracking();
1233         frame = talloc_stackframe();
1234
1235         setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1236
1237         /* glibc (?) likes to print "User defined signal 1" and exit if a
1238            SIGUSR[12] is received before a handler is installed */
1239
1240         CatchSignal(SIGUSR1, SIG_IGN);
1241         CatchSignal(SIGUSR2, SIG_IGN);
1242
1243         fault_setup();
1244         dump_core_setup("winbindd", lp_logfile());
1245
1246         load_case_tables();
1247
1248         /* Initialise for running in non-root mode */
1249
1250         sec_init();
1251
1252         set_remote_machine_name("winbindd", False);
1253
1254         /* Set environment variable so we don't recursively call ourselves.
1255            This may also be useful interactively. */
1256
1257         if ( !winbind_off() ) {
1258                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1259                 exit(1);
1260         }
1261
1262         /* Initialise samba/rpc client stuff */
1263
1264         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1265
1266         while ((opt = poptGetNextOpt(pc)) != -1) {
1267                 switch (opt) {
1268                         /* Don't become a daemon */
1269                 case OPT_DAEMON:
1270                         is_daemon = True;
1271                         break;
1272                 case 'i':
1273                         interactive = True;
1274                         log_stdout = True;
1275                         Fork = False;
1276                         break;
1277                 case OPT_FORK:
1278                         Fork = false;
1279                         break;
1280                 case OPT_NO_PROCESS_GROUP:
1281                         no_process_group = true;
1282                         break;
1283                 case OPT_LOG_STDOUT:
1284                         log_stdout = true;
1285                         break;
1286                 case 'n':
1287                         opt_nocache = true;
1288                         break;
1289                 default:
1290                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1291                                   poptBadOption(pc, 0), poptStrerror(opt));
1292                         poptPrintUsage(pc, stderr, 0);
1293                         exit(1);
1294                 }
1295         }
1296
1297         if (is_daemon && interactive) {
1298                 d_fprintf(stderr,"\nERROR: "
1299                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1300                 poptPrintUsage(pc, stderr, 0);
1301                 exit(1);
1302         }
1303
1304         if (log_stdout && Fork) {
1305                 d_fprintf(stderr, "\nERROR: "
1306                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1307                 poptPrintUsage(pc, stderr, 0);
1308                 exit(1);
1309         }
1310
1311         poptFreeContext(pc);
1312
1313         if (!override_logfile) {
1314                 char *lfile = NULL;
1315                 if (asprintf(&lfile,"%s/log.winbindd",
1316                                 get_dyn_LOGFILEBASE()) > 0) {
1317                         lp_set_logfile(lfile);
1318                         SAFE_FREE(lfile);
1319                 }
1320         }
1321
1322         if (log_stdout) {
1323                 setup_logging("winbindd", DEBUG_STDOUT);
1324         } else {
1325                 setup_logging("winbindd", DEBUG_FILE);
1326         }
1327         reopen_logs();
1328
1329         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1330         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1331
1332         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1333                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1334                 exit(1);
1335         }
1336
1337         /* Initialise messaging system */
1338
1339         if (winbind_messaging_context() == NULL) {
1340                 exit(1);
1341         }
1342
1343         if (!reload_services_file(NULL)) {
1344                 DEBUG(0, ("error opening config file\n"));
1345                 exit(1);
1346         }
1347
1348         if (!directory_exist(lp_lockdir())) {
1349                 mkdir(lp_lockdir(), 0755);
1350         }
1351
1352         /* Setup names. */
1353
1354         if (!init_names())
1355                 exit(1);
1356
1357         load_interfaces();
1358
1359         if (!secrets_init()) {
1360
1361                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1362                 return False;
1363         }
1364
1365         /* Unblock all signals we are interested in as they may have been
1366            blocked by the parent process. */
1367
1368         BlockSignals(False, SIGINT);
1369         BlockSignals(False, SIGQUIT);
1370         BlockSignals(False, SIGTERM);
1371         BlockSignals(False, SIGUSR1);
1372         BlockSignals(False, SIGUSR2);
1373         BlockSignals(False, SIGHUP);
1374         BlockSignals(False, SIGCHLD);
1375
1376         if (!interactive)
1377                 become_daemon(Fork, no_process_group, log_stdout);
1378
1379         pidfile_create("winbindd");
1380
1381 #if HAVE_SETPGID
1382         /*
1383          * If we're interactive we want to set our own process group for
1384          * signal management.
1385          */
1386         if (interactive && !no_process_group)
1387                 setpgid( (pid_t)0, (pid_t)0);
1388 #endif
1389
1390         TimeInit();
1391
1392         /* Don't use winbindd_reinit_after_fork here as
1393          * we're just starting up and haven't created any
1394          * winbindd-specific resources we must free yet. JRA.
1395          */
1396
1397         status = reinit_after_fork(winbind_messaging_context(),
1398                                    winbind_event_context(),
1399                                    procid_self(), false);
1400         if (!NT_STATUS_IS_OK(status)) {
1401                 DEBUG(0,("reinit_after_fork() failed\n"));
1402                 exit(1);
1403         }
1404
1405         winbindd_register_handlers();
1406
1407         status = init_system_info();
1408         if (!NT_STATUS_IS_OK(status)) {
1409                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1410                           nt_errstr(status)));
1411                 exit(1);
1412         }
1413
1414         rpc_lsarpc_init(NULL);
1415         rpc_samr_init(NULL);
1416
1417         winbindd_init_addrchange(NULL, winbind_event_context(),
1418                                  winbind_messaging_context());
1419
1420         /* setup listen sockets */
1421
1422         if (!winbindd_setup_listeners()) {
1423                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1424                 exit(1);
1425         }
1426
1427         TALLOC_FREE(frame);
1428         /* Loop waiting for requests */
1429         while (1) {
1430                 frame = talloc_stackframe();
1431
1432                 if (tevent_loop_once(winbind_event_context()) == -1) {
1433                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1434                                   strerror(errno)));
1435                         return 1;
1436                 }
1437
1438                 TALLOC_FREE(frame);
1439         }
1440
1441         return 0;
1442 }