source3/winbindd/winbindd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) by Tim Potter 2000-2002
   7    Copyright (C) Andrew Tridgell 2002
   8    Copyright (C) Jelmer Vernooij 2003
   9    Copyright (C) Volker Lendecke 2004
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "popt_common.h"
  27 #include "winbindd.h"
  28 #include "nsswitch/winbind_client.h"
  29 #include "nsswitch/wb_reqtrans.h"
  30 #include "../librpc/gen_ndr/srv_lsa.h"
  31 #include "../librpc/gen_ndr/srv_samr.h"
  32 #include "secrets.h"
  33 #include "idmap.h"
  34 #include "lib/addrchange.h"
  35 #include "serverid.h"
  36 #include "auth.h"
  37 #include "messages.h"
  38
  39 #undef DBGC_CLASS
  40 #define DBGC_CLASS DBGC_WINBIND
  41
  42 static bool client_is_idle(struct winbindd_cli_state *state);
  43 static void remove_client(struct winbindd_cli_state *state);
  44
  45 static bool opt_nocache = False;
  46 static bool interactive = False;
  47
  48 extern bool override_logfile;
  49
  50 struct messaging_context *winbind_messaging_context(void)
  51 {
  52         struct messaging_context *msg_ctx = server_messaging_context();
  53         if (likely(msg_ctx != NULL)) {
  54                 return msg_ctx;
  55         }
  56         smb_panic("Could not init winbindd's messaging context.\n");
  57         return NULL;
  58 }
  59
  60 /* Reload configuration */
  61
  62 static bool reload_services_file(const char *lfile)
  63 {
  64         bool ret;
  65
  66         if (lp_loaded()) {
  67                 const char *fname = lp_configfile();
  68
  69                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  70                         set_dyn_CONFIGFILE(fname);
  71                 }
  72         }
  73
  74         /* if this is a child, restore the logfile to the special
  75            name - <domain>, idmap, etc. */
  76         if (lfile && *lfile) {
  77                 lp_set_logfile(lfile);
  78         }
  79
  80         reopen_logs();
  81         ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
  82
  83         reopen_logs();
  84         load_interfaces();
  85
  86         return(ret);
  87 }
  88
  89
  90 static void winbindd_status(void)
  91 {
  92         struct winbindd_cli_state *tmp;
  93
  94         DEBUG(0, ("winbindd status:\n"));
  95
  96         /* Print client state information */
  97
  98         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
  99
 100         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 101                 DEBUG(2, ("\tclient list:\n"));
 102                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 103                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 104                                      (unsigned long)tmp->pid, tmp->sock,
 105                                      client_is_idle(tmp) ? "idle" : "active"));
 106                 }
 107         }
 108 }
 109
 110 /* Flush client cache */
 111
 112 static void flush_caches(void)
 113 {
 114         /* We need to invalidate cached user list entries on a SIGHUP
 115            otherwise cached access denied errors due to restrict anonymous
 116            hang around until the sequence number changes. */
 117
 118         if (!wcache_invalidate_cache()) {
 119                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 120                 if (!winbindd_cache_validate_and_initialize()) {
 121                         exit(1);
 122                 }
 123         }
 124 }
 125
 126 static void flush_caches_noinit(void)
 127 {
 128         /*
 129          * We need to invalidate cached user list entries on a SIGHUP
 130          * otherwise cached access denied errors due to restrict anonymous
 131          * hang around until the sequence number changes.
 132          * NB
 133          * Skip uninitialized domains when flush cache.
 134          * If domain is not initialized, it means it is never
 135          * used or never become online. look, wcache_invalidate_cache()
 136          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 137          * for unused domains and large traffic for primay domain's DC if there
 138          * are many domains..
 139          */
 140
 141         if (!wcache_invalidate_cache_noinit()) {
 142                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 143                 if (!winbindd_cache_validate_and_initialize()) {
 144                         exit(1);
 145                 }
 146         }
 147 }
 148
 149 /* Handle the signal by unlinking socket and exiting */
 150
 151 static void terminate(bool is_parent)
 152 {
 153         if (is_parent) {
 154                 /* When parent goes away we should
 155                  * remove the socket file. Not so
 156                  * when children terminate.
 157                  */
 158                 char *path = NULL;
 159
 160                 if (asprintf(&path, "%s/%s",
 161                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 162                         unlink(path);
 163                         SAFE_FREE(path);
 164                 }
 165         }
 166
 167         idmap_close();
 168
 169         trustdom_cache_shutdown();
 170
 171         gencache_stabilize();
 172
 173 #if 0
 174         if (interactive) {
 175                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 176                 char *description = talloc_describe_all(mem_ctx);
 177
 178                 DEBUG(3, ("tallocs left:\n%s\n", description));
 179                 talloc_destroy(mem_ctx);
 180         }
 181 #endif
 182
 183         if (is_parent) {
 184                 serverid_deregister(procid_self());
 185                 pidfile_unlink();
 186         }
 187
 188         exit(0);
 189 }
 190
 191 static void winbindd_sig_term_handler(struct tevent_context *ev,
 192                                       struct tevent_signal *se,
 193                                       int signum,
 194                                       int count,
 195                                       void *siginfo,
 196                                       void *private_data)
 197 {
 198         bool *is_parent = talloc_get_type_abort(private_data, bool);
 199
 200         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 201                  signum, (int)*is_parent));
 202         terminate(*is_parent);
 203 }
 204
 205 bool winbindd_setup_sig_term_handler(bool parent)
 206 {
 207         struct tevent_signal *se;
 208         bool *is_parent;
 209
 210         is_parent = talloc(winbind_event_context(), bool);
 211         if (!is_parent) {
 212                 return false;
 213         }
 214
 215         *is_parent = parent;
 216
 217         se = tevent_add_signal(winbind_event_context(),
 218                                is_parent,
 219                                SIGTERM, 0,
 220                                winbindd_sig_term_handler,
 221                                is_parent);
 222         if (!se) {
 223                 DEBUG(0,("failed to setup SIGTERM handler"));
 224                 talloc_free(is_parent);
 225                 return false;
 226         }
 227
 228         se = tevent_add_signal(winbind_event_context(),
 229                                is_parent,
 230                                SIGINT, 0,
 231                                winbindd_sig_term_handler,
 232                                is_parent);
 233         if (!se) {
 234                 DEBUG(0,("failed to setup SIGINT handler"));
 235                 talloc_free(is_parent);
 236                 return false;
 237         }
 238
 239         se = tevent_add_signal(winbind_event_context(),
 240                                is_parent,
 241                                SIGQUIT, 0,
 242                                winbindd_sig_term_handler,
 243                                is_parent);
 244         if (!se) {
 245                 DEBUG(0,("failed to setup SIGINT handler"));
 246                 talloc_free(is_parent);
 247                 return false;
 248         }
 249
 250         return true;
 251 }
 252
 253 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 254                                      struct tevent_signal *se,
 255                                      int signum,
 256                                      int count,
 257                                      void *siginfo,
 258                                      void *private_data)
 259 {
 260         const char *file = (const char *)private_data;
 261
 262         DEBUG(1,("Reloading services after SIGHUP\n"));
 263         flush_caches_noinit();
 264         reload_services_file(file);
 265 }
 266
 267 bool winbindd_setup_sig_hup_handler(const char *lfile)
 268 {
 269         struct tevent_signal *se;
 270         char *file = NULL;
 271
 272         if (lfile) {
 273                 file = talloc_strdup(winbind_event_context(),
 274                                      lfile);
 275                 if (!file) {
 276                         return false;
 277                 }
 278         }
 279
 280         se = tevent_add_signal(winbind_event_context(),
 281                                winbind_event_context(),
 282                                SIGHUP, 0,
 283                                winbindd_sig_hup_handler,
 284                                file);
 285         if (!se) {
 286                 return false;
 287         }
 288
 289         return true;
 290 }
 291
 292 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 293                                       struct tevent_signal *se,
 294                                       int signum,
 295                                       int count,
 296                                       void *siginfo,
 297                                       void *private_data)
 298 {
 299         pid_t pid;
 300
 301         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 302                 winbind_child_died(pid);
 303         }
 304 }
 305
 306 static bool winbindd_setup_sig_chld_handler(void)
 307 {
 308         struct tevent_signal *se;
 309
 310         se = tevent_add_signal(winbind_event_context(),
 311                                winbind_event_context(),
 312                                SIGCHLD, 0,
 313                                winbindd_sig_chld_handler,
 314                                NULL);
 315         if (!se) {
 316                 return false;
 317         }
 318
 319         return true;
 320 }
 321
 322 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 323                                       struct tevent_signal *se,
 324                                       int signum,
 325                                       int count,
 326                                       void *siginfo,
 327                                       void *private_data)
 328 {
 329         winbindd_status();
 330 }
 331
 332 static bool winbindd_setup_sig_usr2_handler(void)
 333 {
 334         struct tevent_signal *se;
 335
 336         se = tevent_add_signal(winbind_event_context(),
 337                                winbind_event_context(),
 338                                SIGUSR2, 0,
 339                                winbindd_sig_usr2_handler,
 340                                NULL);
 341         if (!se) {
 342                 return false;
 343         }
 344
 345         return true;
 346 }
 347
 348 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 349 static void msg_reload_services(struct messaging_context *msg,
 350                                 void *private_data,
 351                                 uint32_t msg_type,
 352                                 struct server_id server_id,
 353                                 DATA_BLOB *data)
 354 {
 355         /* Flush various caches */
 356         flush_caches();
 357         reload_services_file((const char *) private_data);
 358 }
 359
 360 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 361 static void msg_shutdown(struct messaging_context *msg,
 362                          void *private_data,
 363                          uint32_t msg_type,
 364                          struct server_id server_id,
 365                          DATA_BLOB *data)
 366 {
 367         /* only the parent waits for this message */
 368         DEBUG(0,("Got shutdown message\n"));
 369         terminate(true);
 370 }
 371
 372
 373 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 374                                        void *private_data,
 375                                        uint32_t msg_type,
 376                                        struct server_id server_id,
 377                                        DATA_BLOB *data)
 378 {
 379         uint8 ret;
 380         pid_t child_pid;
 381
 382         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 383                    "message.\n"));
 384
 385         /*
 386          * call the validation code from a child:
 387          * so we don't block the main winbindd and the validation
 388          * code can safely use fork/waitpid...
 389          */
 390         child_pid = sys_fork();
 391
 392         if (child_pid == -1) {
 393                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 394                           strerror(errno)));
 395                 return;
 396         }
 397
 398         if (child_pid != 0) {
 399                 /* parent */
 400                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 401                           "pid %d.\n", (int)child_pid));
 402                 return;
 403         }
 404
 405         /* child */
 406
 407         if (!winbindd_reinit_after_fork(NULL, NULL)) {
 408                 _exit(0);
 409         }
 410
 411         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 412         CatchSignal(SIGCHLD, SIG_DFL);
 413
 414         ret = (uint8)winbindd_validate_cache_nobackup();
 415         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 416         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 417                            (size_t)1);
 418         _exit(0);
 419 }
 420
 421 static struct winbindd_dispatch_table {
 422         enum winbindd_cmd cmd;
 423         void (*fn)(struct winbindd_cli_state *state);
 424         const char *winbindd_cmd_name;
 425 } dispatch_table[] = {
 426
 427         /* Enumeration functions */
 428
 429         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 430           "LIST_TRUSTDOM" },
 431
 432         /* Miscellaneous */
 433
 434         { WINBINDD_INFO, winbindd_info, "INFO" },
 435         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 436           "INTERFACE_VERSION" },
 437         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 438         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 439         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 440         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 441         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 442           "WINBINDD_PRIV_PIPE_DIR" },
 443
 444         /* Credential cache access */
 445         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 446         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 447
 448         /* WINS functions */
 449
 450         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 451         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 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
 544         { 0, NULL, NULL, NULL }
 545 };
 546
 547 static struct winbindd_async_dispatch_table async_priv_table[] = {
 548         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 549           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 550         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 551           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 552         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 553           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 554         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 555           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 556
 557         { 0, NULL, NULL, NULL }
 558 };
 559
 560 static void wb_request_done(struct tevent_req *req);
 561
 562 static void process_request(struct winbindd_cli_state *state)
 563 {
 564         struct winbindd_dispatch_table *table = dispatch_table;
 565         struct winbindd_async_dispatch_table *atable;
 566
 567         state->mem_ctx = talloc_named(state, 0, "winbind request");
 568         if (state->mem_ctx == NULL)
 569                 return;
 570
 571         /* Remember who asked us. */
 572         state->pid = state->request->pid;
 573
 574         state->cmd_name = "unknown request";
 575         state->recv_fn = NULL;
 576
 577         /* Process command */
 578
 579         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 580                 if (state->request->cmd == atable->cmd) {
 581                         break;
 582                 }
 583         }
 584
 585         if ((atable->send_req == NULL) && state->privileged) {
 586                 for (atable = async_priv_table; atable->send_req;
 587                      atable += 1) {
 588                         if (state->request->cmd == atable->cmd) {
 589                                 break;
 590                         }
 591                 }
 592         }
 593
 594         if (atable->send_req != NULL) {
 595                 struct tevent_req *req;
 596
 597                 state->cmd_name = atable->cmd_name;
 598                 state->recv_fn = atable->recv_req;
 599
 600                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 601                            (int)state->pid, state->cmd_name));
 602
 603                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 604                                        state, state->request);
 605                 if (req == NULL) {
 606                         DEBUG(0, ("process_request: atable->send failed for "
 607                                   "%s\n", atable->cmd_name));
 608                         request_error(state);
 609                         return;
 610                 }
 611                 tevent_req_set_callback(req, wb_request_done, state);
 612                 return;
 613         }
 614
 615         state->response = talloc_zero(state->mem_ctx,
 616                                       struct winbindd_response);
 617         if (state->response == NULL) {
 618                 DEBUG(10, ("talloc failed\n"));
 619                 remove_client(state);
 620                 return;
 621         }
 622         state->response->result = WINBINDD_PENDING;
 623         state->response->length = sizeof(struct winbindd_response);
 624
 625         for (table = dispatch_table; table->fn; table++) {
 626                 if (state->request->cmd == table->cmd) {
 627                         DEBUG(10,("process_request: request fn %s\n",
 628                                   table->winbindd_cmd_name ));
 629                         state->cmd_name = table->winbindd_cmd_name;
 630                         table->fn(state);
 631                         break;
 632                 }
 633         }
 634
 635         if (!table->fn) {
 636                 DEBUG(10,("process_request: unknown request fn number %d\n",
 637                           (int)state->request->cmd ));
 638                 request_error(state);
 639         }
 640 }
 641
 642 static void wb_request_done(struct tevent_req *req)
 643 {
 644         struct winbindd_cli_state *state = tevent_req_callback_data(
 645                 req, struct winbindd_cli_state);
 646         NTSTATUS status;
 647
 648         state->response = talloc_zero(state->mem_ctx,
 649                                       struct winbindd_response);
 650         if (state->response == NULL) {
 651                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 652                           (int)state->pid, state->cmd_name));
 653                 remove_client(state);
 654                 return;
 655         }
 656         state->response->result = WINBINDD_PENDING;
 657         state->response->length = sizeof(struct winbindd_response);
 658
 659         status = state->recv_fn(req, state->response);
 660         TALLOC_FREE(req);
 661
 662         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 663                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 664
 665         if (!NT_STATUS_IS_OK(status)) {
 666                 request_error(state);
 667                 return;
 668         }
 669         request_ok(state);
 670 }
 671
 672 /*
 673  * This is the main event loop of winbind requests. It goes through a
 674  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 675  *
 676  * An idle winbind client has a read request of 4 bytes outstanding,
 677  * finalizing function is request_len_recv, checking the length. request_recv
 678  * then processes the packet. The processing function then at some point has
 679  * to call request_finished which schedules sending the response.
 680  */
 681
 682 static void request_finished(struct winbindd_cli_state *state);
 683
 684 static void winbind_client_request_read(struct tevent_req *req);
 685 static void winbind_client_response_written(struct tevent_req *req);
 686
 687 static void request_finished(struct winbindd_cli_state *state)
 688 {
 689         struct tevent_req *req;
 690
 691         TALLOC_FREE(state->request);
 692
 693         req = wb_resp_write_send(state, winbind_event_context(),
 694                                  state->out_queue, state->sock,
 695                                  state->response);
 696         if (req == NULL) {
 697                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 698                           (int)state->pid, state->cmd_name));
 699                 remove_client(state);
 700                 return;
 701         }
 702         tevent_req_set_callback(req, winbind_client_response_written, state);
 703 }
 704
 705 static void winbind_client_response_written(struct tevent_req *req)
 706 {
 707         struct winbindd_cli_state *state = tevent_req_callback_data(
 708                 req, struct winbindd_cli_state);
 709         ssize_t ret;
 710         int err;
 711
 712         ret = wb_resp_write_recv(req, &err);
 713         TALLOC_FREE(req);
 714         if (ret == -1) {
 715                 close(state->sock);
 716                 state->sock = -1;
 717                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 718                           (int)state->pid, state->cmd_name, strerror(err)));
 719                 remove_client(state);
 720                 return;
 721         }
 722
 723         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 724                   "to client\n", (int)state->pid, state->cmd_name));
 725
 726         TALLOC_FREE(state->mem_ctx);
 727         state->response = NULL;
 728         state->cmd_name = "no request";
 729         state->recv_fn = NULL;
 730
 731         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 732                                WINBINDD_MAX_EXTRA_DATA);
 733         if (req == NULL) {
 734                 remove_client(state);
 735                 return;
 736         }
 737         tevent_req_set_callback(req, winbind_client_request_read, state);
 738 }
 739
 740 void request_error(struct winbindd_cli_state *state)
 741 {
 742         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 743         state->response->result = WINBINDD_ERROR;
 744         request_finished(state);
 745 }
 746
 747 void request_ok(struct winbindd_cli_state *state)
 748 {
 749         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 750         state->response->result = WINBINDD_OK;
 751         request_finished(state);
 752 }
 753
 754 /* Process a new connection by adding it to the client connection list */
 755
 756 static void new_connection(int listen_sock, bool privileged)
 757 {
 758         struct sockaddr_un sunaddr;
 759         struct winbindd_cli_state *state;
 760         struct tevent_req *req;
 761         socklen_t len;
 762         int sock;
 763
 764         /* Accept connection */
 765
 766         len = sizeof(sunaddr);
 767
 768         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 769
 770         if (sock == -1) {
 771                 if (errno != EINTR) {
 772                         DEBUG(0, ("Faild to accept socket - %s\n",
 773                                   strerror(errno)));
 774                 }
 775                 return;
 776         }
 777
 778         DEBUG(6,("accepted socket %d\n", sock));
 779
 780         /* Create new connection structure */
 781
 782         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 783                 close(sock);
 784                 return;
 785         }
 786
 787         state->sock = sock;
 788
 789         state->out_queue = tevent_queue_create(state, "winbind client reply");
 790         if (state->out_queue == NULL) {
 791                 close(sock);
 792                 TALLOC_FREE(state);
 793                 return;
 794         }
 795
 796         state->last_access = time(NULL);
 797
 798         state->privileged = privileged;
 799
 800         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 801                                WINBINDD_MAX_EXTRA_DATA);
 802         if (req == NULL) {
 803                 TALLOC_FREE(state);
 804                 close(sock);
 805                 return;
 806         }
 807         tevent_req_set_callback(req, winbind_client_request_read, state);
 808
 809         /* Add to connection list */
 810
 811         winbindd_add_client(state);
 812 }
 813
 814 static void winbind_client_request_read(struct tevent_req *req)
 815 {
 816         struct winbindd_cli_state *state = tevent_req_callback_data(
 817                 req, struct winbindd_cli_state);
 818         ssize_t ret;
 819         int err;
 820
 821         ret = wb_req_read_recv(req, state, &state->request, &err);
 822         TALLOC_FREE(req);
 823         if (ret == -1) {
 824                 if (err == EPIPE) {
 825                         DEBUG(6, ("closing socket %d, client exited\n",
 826                                   state->sock));
 827                 } else {
 828                         DEBUG(2, ("Could not read client request from fd %d: "
 829                                   "%s\n", state->sock, strerror(err)));
 830                 }
 831                 close(state->sock);
 832                 state->sock = -1;
 833                 remove_client(state);
 834                 return;
 835         }
 836         process_request(state);
 837 }
 838
 839 /* Remove a client connection from client connection list */
 840
 841 static void remove_client(struct winbindd_cli_state *state)
 842 {
 843         char c = 0;
 844         int nwritten;
 845
 846         /* It's a dead client - hold a funeral */
 847
 848         if (state == NULL) {
 849                 return;
 850         }
 851
 852         if (state->sock != -1) {
 853                 /* tell client, we are closing ... */
 854                 nwritten = write(state->sock, &c, sizeof(c));
 855                 if (nwritten == -1) {
 856                         DEBUG(2, ("final write to client failed: %s\n",
 857                                 strerror(errno)));
 858                 }
 859
 860                 /* Close socket */
 861
 862                 close(state->sock);
 863                 state->sock = -1;
 864         }
 865
 866         TALLOC_FREE(state->mem_ctx);
 867
 868         /* Remove from list and free */
 869
 870         winbindd_remove_client(state);
 871         TALLOC_FREE(state);
 872 }
 873
 874 /* Is a client idle? */
 875
 876 static bool client_is_idle(struct winbindd_cli_state *state) {
 877   return (state->response == NULL &&
 878           !state->pwent_state && !state->grent_state);
 879 }
 880
 881 /* Shutdown client connection which has been idle for the longest time */
 882
 883 static bool remove_idle_client(void)
 884 {
 885         struct winbindd_cli_state *state, *remove_state = NULL;
 886         time_t last_access = 0;
 887         int nidle = 0;
 888
 889         for (state = winbindd_client_list(); state; state = state->next) {
 890                 if (client_is_idle(state)) {
 891                         nidle++;
 892                         if (!last_access || state->last_access < last_access) {
 893                                 last_access = state->last_access;
 894                                 remove_state = state;
 895                         }
 896                 }
 897         }
 898
 899         if (remove_state) {
 900                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 901                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 902                 remove_client(remove_state);
 903                 return True;
 904         }
 905
 906         return False;
 907 }
 908
 909 struct winbindd_listen_state {
 910         bool privileged;
 911         int fd;
 912 };
 913
 914 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 915                                         struct tevent_fd *fde,
 916                                         uint16_t flags,
 917                                         void *private_data)
 918 {
 919         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 920                                           struct winbindd_listen_state);
 921
 922         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 923                 DEBUG(5,("winbindd: Exceeding %d client "
 924                          "connections, removing idle "
 925                          "connection.\n", lp_winbind_max_clients()));
 926                 if (!remove_idle_client()) {
 927                         DEBUG(0,("winbindd: Exceeding %d "
 928                                  "client connections, no idle "
 929                                  "connection found\n",
 930                                  lp_winbind_max_clients()));
 931                         break;
 932                 }
 933         }
 934         new_connection(s->fd, s->privileged);
 935 }
 936
 937 /*
 938  * Winbindd socket accessor functions
 939  */
 940
 941 const char *get_winbind_pipe_dir(void)
 942 {
 943         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 944 }
 945
 946 char *get_winbind_priv_pipe_dir(void)
 947 {
 948         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 949 }
 950
 951 static bool winbindd_setup_listeners(void)
 952 {
 953         struct winbindd_listen_state *pub_state = NULL;
 954         struct winbindd_listen_state *priv_state = NULL;
 955         struct tevent_fd *fde;
 956
 957         pub_state = talloc(winbind_event_context(),
 958                            struct winbindd_listen_state);
 959         if (!pub_state) {
 960                 goto failed;
 961         }
 962
 963         pub_state->privileged = false;
 964         pub_state->fd = create_pipe_sock(
 965                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 966         if (pub_state->fd == -1) {
 967                 goto failed;
 968         }
 969
 970         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 971                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 972                             pub_state);
 973         if (fde == NULL) {
 974                 close(pub_state->fd);
 975                 goto failed;
 976         }
 977         tevent_fd_set_auto_close(fde);
 978
 979         priv_state = talloc(winbind_event_context(),
 980                             struct winbindd_listen_state);
 981         if (!priv_state) {
 982                 goto failed;
 983         }
 984
 985         priv_state->privileged = true;
 986         priv_state->fd = create_pipe_sock(
 987                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 988         if (priv_state->fd == -1) {
 989                 goto failed;
 990         }
 991
 992         fde = tevent_add_fd(winbind_event_context(), priv_state,
 993                             priv_state->fd, TEVENT_FD_READ,
 994                             winbindd_listen_fde_handler, priv_state);
 995         if (fde == NULL) {
 996                 close(priv_state->fd);
 997                 goto failed;
 998         }
 999         tevent_fd_set_auto_close(fde);
1000
1001         return true;
1002 failed:
1003         TALLOC_FREE(pub_state);
1004         TALLOC_FREE(priv_state);
1005         return false;
1006 }
1007
1008 bool winbindd_use_idmap_cache(void)
1009 {
1010         return !opt_nocache;
1011 }
1012
1013 bool winbindd_use_cache(void)
1014 {
1015         return !opt_nocache;
1016 }
1017
1018 void winbindd_register_handlers(void)
1019 {
1020         /* Setup signal handlers */
1021
1022         if (!winbindd_setup_sig_term_handler(true))
1023                 exit(1);
1024         if (!winbindd_setup_sig_hup_handler(NULL))
1025                 exit(1);
1026         if (!winbindd_setup_sig_chld_handler())
1027                 exit(1);
1028         if (!winbindd_setup_sig_usr2_handler())
1029                 exit(1);
1030
1031         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1032
1033         /*
1034          * Ensure all cache and idmap caches are consistent
1035          * and initialized before we startup.
1036          */
1037         if (!winbindd_cache_validate_and_initialize()) {
1038                 exit(1);
1039         }
1040
1041         /* get broadcast messages */
1042
1043         if (!serverid_register(procid_self(),
1044                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1045                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1046                 exit(1);
1047         }
1048
1049         /* React on 'smbcontrol winbindd reload-config' in the same way
1050            as to SIGHUP signal */
1051         messaging_register(winbind_messaging_context(), NULL,
1052                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1053         messaging_register(winbind_messaging_context(), NULL,
1054                            MSG_SHUTDOWN, msg_shutdown);
1055
1056         /* Handle online/offline messages. */
1057         messaging_register(winbind_messaging_context(), NULL,
1058                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1059         messaging_register(winbind_messaging_context(), NULL,
1060                            MSG_WINBIND_ONLINE, winbind_msg_online);
1061         messaging_register(winbind_messaging_context(), NULL,
1062                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1063
1064         messaging_register(winbind_messaging_context(), NULL,
1065                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1066
1067         messaging_register(winbind_messaging_context(), NULL,
1068                            MSG_WINBIND_VALIDATE_CACHE,
1069                            winbind_msg_validate_cache);
1070
1071         messaging_register(winbind_messaging_context(), NULL,
1072                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1073                            winbind_msg_dump_domain_list);
1074
1075         messaging_register(winbind_messaging_context(), NULL,
1076                            MSG_WINBIND_IP_DROPPED,
1077                            winbind_msg_ip_dropped_parent);
1078
1079         /* Register handler for MSG_DEBUG. */
1080         messaging_register(winbind_messaging_context(), NULL,
1081                            MSG_DEBUG,
1082                            winbind_msg_debug);
1083
1084         netsamlogon_cache_init(); /* Non-critical */
1085
1086         /* clear the cached list of trusted domains */
1087
1088         wcache_tdc_clear();
1089
1090         if (!init_domain_list()) {
1091                 DEBUG(0,("unable to initialize domain list\n"));
1092                 exit(1);
1093         }
1094
1095         init_idmap_child();
1096         init_locator_child();
1097
1098         smb_nscd_flush_user_cache();
1099         smb_nscd_flush_group_cache();
1100
1101         if (lp_allow_trusted_domains()) {
1102                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1103                               rescan_trusted_domains, NULL) == NULL) {
1104                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1105                         exit(1);
1106                 }
1107         }
1108
1109 }
1110
1111 struct winbindd_addrchanged_state {
1112         struct addrchange_context *ctx;
1113         struct tevent_context *ev;
1114         struct messaging_context *msg_ctx;
1115 };
1116
1117 static void winbindd_addr_changed(struct tevent_req *req);
1118
1119 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1120                                      struct tevent_context *ev,
1121                                      struct messaging_context *msg_ctx)
1122 {
1123         struct winbindd_addrchanged_state *state;
1124         struct tevent_req *req;
1125         NTSTATUS status;
1126
1127         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1128         if (state == NULL) {
1129                 DEBUG(10, ("talloc failed\n"));
1130                 return;
1131         }
1132         state->ev = ev;
1133         state->msg_ctx = msg_ctx;
1134
1135         status = addrchange_context_create(state, &state->ctx);
1136         if (!NT_STATUS_IS_OK(status)) {
1137                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1138                            nt_errstr(status)));
1139                 TALLOC_FREE(state);
1140                 return;
1141         }
1142         req = addrchange_send(state, ev, state->ctx);
1143         if (req == NULL) {
1144                 DEBUG(0, ("addrchange_send failed\n"));
1145                 TALLOC_FREE(state);
1146                 return;
1147         }
1148         tevent_req_set_callback(req, winbindd_addr_changed, state);
1149 }
1150
1151 static void winbindd_addr_changed(struct tevent_req *req)
1152 {
1153         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1154                 req, struct winbindd_addrchanged_state);
1155         enum addrchange_type type;
1156         struct sockaddr_storage addr;
1157         NTSTATUS status;
1158
1159         status = addrchange_recv(req, &type, &addr);
1160         TALLOC_FREE(req);
1161         if (!NT_STATUS_IS_OK(status)) {
1162                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1163                            nt_errstr(status)));
1164                 TALLOC_FREE(state);
1165                 return;
1166         }
1167         if (type == ADDRCHANGE_DEL) {
1168                 char addrstr[INET6_ADDRSTRLEN];
1169                 DATA_BLOB blob;
1170
1171                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1172
1173                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1174                           addrstr));
1175
1176                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1177
1178                 status = messaging_send(state->msg_ctx,
1179                                         messaging_server_id(state->msg_ctx),
1180                                         MSG_WINBIND_IP_DROPPED, &blob);
1181                 if (!NT_STATUS_IS_OK(status)) {
1182                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1183                                    nt_errstr(status)));
1184                 }
1185         }
1186         req = addrchange_send(state, state->ev, state->ctx);
1187         if (req == NULL) {
1188                 DEBUG(0, ("addrchange_send failed\n"));
1189                 TALLOC_FREE(state);
1190                 return;
1191         }
1192         tevent_req_set_callback(req, winbindd_addr_changed, state);
1193 }
1194
1195 /* Main function */
1196
1197 int main(int argc, char **argv, char **envp)
1198 {
1199         static bool is_daemon = False;
1200         static bool Fork = True;
1201         static bool log_stdout = False;
1202         static bool no_process_group = False;
1203         enum {
1204                 OPT_DAEMON = 1000,
1205                 OPT_FORK,
1206                 OPT_NO_PROCESS_GROUP,
1207                 OPT_LOG_STDOUT
1208         };
1209         struct poptOption long_options[] = {
1210                 POPT_AUTOHELP
1211                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1212                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1213                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1214                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1215                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1216                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1217                 POPT_COMMON_SAMBA
1218                 POPT_TABLEEND
1219         };
1220         poptContext pc;
1221         int opt;
1222         TALLOC_CTX *frame;
1223         NTSTATUS status;
1224
1225         /*
1226          * Do this before any other talloc operation
1227          */
1228         talloc_enable_null_tracking();
1229         frame = talloc_stackframe();
1230
1231         /* glibc (?) likes to print "User defined signal 1" and exit if a
1232            SIGUSR[12] is received before a handler is installed */
1233
1234         CatchSignal(SIGUSR1, SIG_IGN);
1235         CatchSignal(SIGUSR2, SIG_IGN);
1236
1237         fault_setup();
1238         dump_core_setup("winbindd", lp_logfile());
1239
1240         load_case_tables();
1241
1242         /* Initialise for running in non-root mode */
1243
1244         sec_init();
1245
1246         set_remote_machine_name("winbindd", False);
1247
1248         /* Set environment variable so we don't recursively call ourselves.
1249            This may also be useful interactively. */
1250
1251         if ( !winbind_off() ) {
1252                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1253                 exit(1);
1254         }
1255
1256         /* Initialise samba/rpc client stuff */
1257
1258         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1259
1260         while ((opt = poptGetNextOpt(pc)) != -1) {
1261                 switch (opt) {
1262                         /* Don't become a daemon */
1263                 case OPT_DAEMON:
1264                         is_daemon = True;
1265                         break;
1266                 case 'i':
1267                         interactive = True;
1268                         log_stdout = True;
1269                         Fork = False;
1270                         break;
1271                 case OPT_FORK:
1272                         Fork = false;
1273                         break;
1274                 case OPT_NO_PROCESS_GROUP:
1275                         no_process_group = true;
1276                         break;
1277                 case OPT_LOG_STDOUT:
1278                         log_stdout = true;
1279                         break;
1280                 case 'n':
1281                         opt_nocache = true;
1282                         break;
1283                 default:
1284                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1285                                   poptBadOption(pc, 0), poptStrerror(opt));
1286                         poptPrintUsage(pc, stderr, 0);
1287                         exit(1);
1288                 }
1289         }
1290
1291         if (is_daemon && interactive) {
1292                 d_fprintf(stderr,"\nERROR: "
1293                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1294                 poptPrintUsage(pc, stderr, 0);
1295                 exit(1);
1296         }
1297
1298         if (log_stdout && Fork) {
1299                 d_fprintf(stderr, "\nERROR: "
1300                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1301                 poptPrintUsage(pc, stderr, 0);
1302                 exit(1);
1303         }
1304
1305         poptFreeContext(pc);
1306
1307         if (!override_logfile) {
1308                 char *lfile = NULL;
1309                 if (asprintf(&lfile,"%s/log.winbindd",
1310                                 get_dyn_LOGFILEBASE()) > 0) {
1311                         lp_set_logfile(lfile);
1312                         SAFE_FREE(lfile);
1313                 }
1314         }
1315         if (log_stdout) {
1316                 setup_logging("winbindd", DEBUG_STDOUT);
1317         } else {
1318                 setup_logging("winbindd", DEBUG_FILE);
1319         }
1320         reopen_logs();
1321
1322         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1323         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1324
1325         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1326                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1327                 exit(1);
1328         }
1329
1330         /* Initialise messaging system */
1331
1332         if (winbind_messaging_context() == NULL) {
1333                 exit(1);
1334         }
1335
1336         if (!reload_services_file(NULL)) {
1337                 DEBUG(0, ("error opening config file\n"));
1338                 exit(1);
1339         }
1340
1341         if (!directory_exist(lp_lockdir())) {
1342                 mkdir(lp_lockdir(), 0755);
1343         }
1344
1345         /* Setup names. */
1346
1347         if (!init_names())
1348                 exit(1);
1349
1350         load_interfaces();
1351
1352         if (!secrets_init()) {
1353
1354                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1355                 return False;
1356         }
1357
1358         /* Unblock all signals we are interested in as they may have been
1359            blocked by the parent process. */
1360
1361         BlockSignals(False, SIGINT);
1362         BlockSignals(False, SIGQUIT);
1363         BlockSignals(False, SIGTERM);
1364         BlockSignals(False, SIGUSR1);
1365         BlockSignals(False, SIGUSR2);
1366         BlockSignals(False, SIGHUP);
1367         BlockSignals(False, SIGCHLD);
1368
1369         if (!interactive)
1370                 become_daemon(Fork, no_process_group, log_stdout);
1371
1372         pidfile_create("winbindd");
1373
1374 #if HAVE_SETPGID
1375         /*
1376          * If we're interactive we want to set our own process group for
1377          * signal management.
1378          */
1379         if (interactive && !no_process_group)
1380                 setpgid( (pid_t)0, (pid_t)0);
1381 #endif
1382
1383         TimeInit();
1384
1385         /* Don't use winbindd_reinit_after_fork here as
1386          * we're just starting up and haven't created any
1387          * winbindd-specific resources we must free yet. JRA.
1388          */
1389
1390         status = reinit_after_fork(winbind_messaging_context(),
1391                                    winbind_event_context(),
1392                                    procid_self(), false);
1393         if (!NT_STATUS_IS_OK(status)) {
1394                 DEBUG(0,("reinit_after_fork() failed\n"));
1395                 exit(1);
1396         }
1397
1398         winbindd_register_handlers();
1399
1400         status = init_system_info();
1401         if (!NT_STATUS_IS_OK(status)) {
1402                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1403                           nt_errstr(status)));
1404                 exit(1);
1405         }
1406
1407         rpc_lsarpc_init(NULL);
1408         rpc_samr_init(NULL);
1409
1410         winbindd_init_addrchange(NULL, winbind_event_context(),
1411                                  winbind_messaging_context());
1412
1413         /* setup listen sockets */
1414
1415         if (!winbindd_setup_listeners()) {
1416                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1417                 exit(1);
1418         }
1419
1420         TALLOC_FREE(frame);
1421         /* Loop waiting for requests */
1422         while (1) {
1423                 frame = talloc_stackframe();
1424
1425                 if (tevent_loop_once(winbind_event_context()) == -1) {
1426                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1427                                   strerror(errno)));
1428                         return 1;
1429                 }
1430
1431                 TALLOC_FREE(frame);
1432         }
1433
1434         return 0;
1435 }