source3/winbindd/winbindd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) by Tim Potter 2000-2002
   7    Copyright (C) Andrew Tridgell 2002
   8    Copyright (C) Jelmer Vernooij 2003
   9    Copyright (C) Volker Lendecke 2004
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "popt_common.h"
  27 #include "winbindd.h"
  28 #include "nsswitch/winbind_client.h"
  29 #include "nsswitch/wb_reqtrans.h"
  30 #include "ntdomain.h"
  31 #include "../librpc/gen_ndr/srv_lsa.h"
  32 #include "../librpc/gen_ndr/srv_samr.h"
  33 #include "secrets.h"
  34 #include "idmap.h"
  35 #include "lib/addrchange.h"
  36 #include "serverid.h"
  37 #include "auth.h"
  38 #include "messages.h"
  39
  40 #undef DBGC_CLASS
  41 #define DBGC_CLASS DBGC_WINBIND
  42
  43 static bool client_is_idle(struct winbindd_cli_state *state);
  44 static void remove_client(struct winbindd_cli_state *state);
  45
  46 static bool opt_nocache = False;
  47 static bool interactive = False;
  48
  49 extern bool override_logfile;
  50
  51 struct messaging_context *winbind_messaging_context(void)
  52 {
  53         struct messaging_context *msg_ctx = server_messaging_context();
  54         if (likely(msg_ctx != NULL)) {
  55                 return msg_ctx;
  56         }
  57         smb_panic("Could not init winbindd's messaging context.\n");
  58         return NULL;
  59 }
  60
  61 /* Reload configuration */
  62
  63 static bool reload_services_file(const char *lfile)
  64 {
  65         bool ret;
  66
  67         if (lp_loaded()) {
  68                 const char *fname = lp_configfile();
  69
  70                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  71                         set_dyn_CONFIGFILE(fname);
  72                 }
  73         }
  74
  75         /* if this is a child, restore the logfile to the special
  76            name - <domain>, idmap, etc. */
  77         if (lfile && *lfile) {
  78                 lp_set_logfile(lfile);
  79         }
  80
  81         reopen_logs();
  82         ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
  83
  84         reopen_logs();
  85         load_interfaces();
  86
  87         return(ret);
  88 }
  89
  90
  91 static void winbindd_status(void)
  92 {
  93         struct winbindd_cli_state *tmp;
  94
  95         DEBUG(0, ("winbindd status:\n"));
  96
  97         /* Print client state information */
  98
  99         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 100
 101         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 102                 DEBUG(2, ("\tclient list:\n"));
 103                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 104                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 105                                      (unsigned long)tmp->pid, tmp->sock,
 106                                      client_is_idle(tmp) ? "idle" : "active"));
 107                 }
 108         }
 109 }
 110
 111 /* Flush client cache */
 112
 113 static void flush_caches(void)
 114 {
 115         /* We need to invalidate cached user list entries on a SIGHUP
 116            otherwise cached access denied errors due to restrict anonymous
 117            hang around until the sequence number changes. */
 118
 119         if (!wcache_invalidate_cache()) {
 120                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 121                 if (!winbindd_cache_validate_and_initialize()) {
 122                         exit(1);
 123                 }
 124         }
 125 }
 126
 127 static void flush_caches_noinit(void)
 128 {
 129         /*
 130          * We need to invalidate cached user list entries on a SIGHUP
 131          * otherwise cached access denied errors due to restrict anonymous
 132          * hang around until the sequence number changes.
 133          * NB
 134          * Skip uninitialized domains when flush cache.
 135          * If domain is not initialized, it means it is never
 136          * used or never become online. look, wcache_invalidate_cache()
 137          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 138          * for unused domains and large traffic for primay domain's DC if there
 139          * are many domains..
 140          */
 141
 142         if (!wcache_invalidate_cache_noinit()) {
 143                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 144                 if (!winbindd_cache_validate_and_initialize()) {
 145                         exit(1);
 146                 }
 147         }
 148 }
 149
 150 /* Handle the signal by unlinking socket and exiting */
 151
 152 static void terminate(bool is_parent)
 153 {
 154         if (is_parent) {
 155                 /* When parent goes away we should
 156                  * remove the socket file. Not so
 157                  * when children terminate.
 158                  */
 159                 char *path = NULL;
 160
 161                 if (asprintf(&path, "%s/%s",
 162                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 163                         unlink(path);
 164                         SAFE_FREE(path);
 165                 }
 166         }
 167
 168         idmap_close();
 169
 170         trustdom_cache_shutdown();
 171
 172         gencache_stabilize();
 173
 174 #if 0
 175         if (interactive) {
 176                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 177                 char *description = talloc_describe_all(mem_ctx);
 178
 179                 DEBUG(3, ("tallocs left:\n%s\n", description));
 180                 talloc_destroy(mem_ctx);
 181         }
 182 #endif
 183
 184         if (is_parent) {
 185                 serverid_deregister(procid_self());
 186                 pidfile_unlink();
 187         }
 188
 189         exit(0);
 190 }
 191
 192 static void winbindd_sig_term_handler(struct tevent_context *ev,
 193                                       struct tevent_signal *se,
 194                                       int signum,
 195                                       int count,
 196                                       void *siginfo,
 197                                       void *private_data)
 198 {
 199         bool *is_parent = talloc_get_type_abort(private_data, bool);
 200
 201         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 202                  signum, (int)*is_parent));
 203         terminate(*is_parent);
 204 }
 205
 206 bool winbindd_setup_sig_term_handler(bool parent)
 207 {
 208         struct tevent_signal *se;
 209         bool *is_parent;
 210
 211         is_parent = talloc(winbind_event_context(), bool);
 212         if (!is_parent) {
 213                 return false;
 214         }
 215
 216         *is_parent = parent;
 217
 218         se = tevent_add_signal(winbind_event_context(),
 219                                is_parent,
 220                                SIGTERM, 0,
 221                                winbindd_sig_term_handler,
 222                                is_parent);
 223         if (!se) {
 224                 DEBUG(0,("failed to setup SIGTERM handler"));
 225                 talloc_free(is_parent);
 226                 return false;
 227         }
 228
 229         se = tevent_add_signal(winbind_event_context(),
 230                                is_parent,
 231                                SIGINT, 0,
 232                                winbindd_sig_term_handler,
 233                                is_parent);
 234         if (!se) {
 235                 DEBUG(0,("failed to setup SIGINT handler"));
 236                 talloc_free(is_parent);
 237                 return false;
 238         }
 239
 240         se = tevent_add_signal(winbind_event_context(),
 241                                is_parent,
 242                                SIGQUIT, 0,
 243                                winbindd_sig_term_handler,
 244                                is_parent);
 245         if (!se) {
 246                 DEBUG(0,("failed to setup SIGINT handler"));
 247                 talloc_free(is_parent);
 248                 return false;
 249         }
 250
 251         return true;
 252 }
 253
 254 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 255                                      struct tevent_signal *se,
 256                                      int signum,
 257                                      int count,
 258                                      void *siginfo,
 259                                      void *private_data)
 260 {
 261         const char *file = (const char *)private_data;
 262
 263         DEBUG(1,("Reloading services after SIGHUP\n"));
 264         flush_caches_noinit();
 265         reload_services_file(file);
 266 }
 267
 268 bool winbindd_setup_sig_hup_handler(const char *lfile)
 269 {
 270         struct tevent_signal *se;
 271         char *file = NULL;
 272
 273         if (lfile) {
 274                 file = talloc_strdup(winbind_event_context(),
 275                                      lfile);
 276                 if (!file) {
 277                         return false;
 278                 }
 279         }
 280
 281         se = tevent_add_signal(winbind_event_context(),
 282                                winbind_event_context(),
 283                                SIGHUP, 0,
 284                                winbindd_sig_hup_handler,
 285                                file);
 286         if (!se) {
 287                 return false;
 288         }
 289
 290         return true;
 291 }
 292
 293 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 294                                       struct tevent_signal *se,
 295                                       int signum,
 296                                       int count,
 297                                       void *siginfo,
 298                                       void *private_data)
 299 {
 300         pid_t pid;
 301
 302         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 303                 winbind_child_died(pid);
 304         }
 305 }
 306
 307 static bool winbindd_setup_sig_chld_handler(void)
 308 {
 309         struct tevent_signal *se;
 310
 311         se = tevent_add_signal(winbind_event_context(),
 312                                winbind_event_context(),
 313                                SIGCHLD, 0,
 314                                winbindd_sig_chld_handler,
 315                                NULL);
 316         if (!se) {
 317                 return false;
 318         }
 319
 320         return true;
 321 }
 322
 323 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 324                                       struct tevent_signal *se,
 325                                       int signum,
 326                                       int count,
 327                                       void *siginfo,
 328                                       void *private_data)
 329 {
 330         winbindd_status();
 331 }
 332
 333 static bool winbindd_setup_sig_usr2_handler(void)
 334 {
 335         struct tevent_signal *se;
 336
 337         se = tevent_add_signal(winbind_event_context(),
 338                                winbind_event_context(),
 339                                SIGUSR2, 0,
 340                                winbindd_sig_usr2_handler,
 341                                NULL);
 342         if (!se) {
 343                 return false;
 344         }
 345
 346         return true;
 347 }
 348
 349 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 350 static void msg_reload_services(struct messaging_context *msg,
 351                                 void *private_data,
 352                                 uint32_t msg_type,
 353                                 struct server_id server_id,
 354                                 DATA_BLOB *data)
 355 {
 356         /* Flush various caches */
 357         flush_caches();
 358         reload_services_file((const char *) private_data);
 359 }
 360
 361 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 362 static void msg_shutdown(struct messaging_context *msg,
 363                          void *private_data,
 364                          uint32_t msg_type,
 365                          struct server_id server_id,
 366                          DATA_BLOB *data)
 367 {
 368         /* only the parent waits for this message */
 369         DEBUG(0,("Got shutdown message\n"));
 370         terminate(true);
 371 }
 372
 373
 374 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 375                                        void *private_data,
 376                                        uint32_t msg_type,
 377                                        struct server_id server_id,
 378                                        DATA_BLOB *data)
 379 {
 380         uint8 ret;
 381         pid_t child_pid;
 382         NTSTATUS status;
 383
 384         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 385                    "message.\n"));
 386
 387         /*
 388          * call the validation code from a child:
 389          * so we don't block the main winbindd and the validation
 390          * code can safely use fork/waitpid...
 391          */
 392         child_pid = sys_fork();
 393
 394         if (child_pid == -1) {
 395                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 396                           strerror(errno)));
 397                 return;
 398         }
 399
 400         if (child_pid != 0) {
 401                 /* parent */
 402                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 403                           "pid %d.\n", (int)child_pid));
 404                 return;
 405         }
 406
 407         /* child */
 408
 409         status = winbindd_reinit_after_fork(NULL, NULL);
 410         if (!NT_STATUS_IS_OK(status)) {
 411                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 412                           nt_errstr(status)));
 413                 _exit(0);
 414         }
 415
 416         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 417         CatchSignal(SIGCHLD, SIG_DFL);
 418
 419         ret = (uint8)winbindd_validate_cache_nobackup();
 420         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 421         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 422                            (size_t)1);
 423         _exit(0);
 424 }
 425
 426 static struct winbindd_dispatch_table {
 427         enum winbindd_cmd cmd;
 428         void (*fn)(struct winbindd_cli_state *state);
 429         const char *winbindd_cmd_name;
 430 } dispatch_table[] = {
 431
 432         /* Enumeration functions */
 433
 434         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 435           "LIST_TRUSTDOM" },
 436
 437         /* Miscellaneous */
 438
 439         { WINBINDD_INFO, winbindd_info, "INFO" },
 440         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 441           "INTERFACE_VERSION" },
 442         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 443         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 444         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 445         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 446         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 447           "WINBINDD_PRIV_PIPE_DIR" },
 448
 449         /* Credential cache access */
 450         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 451         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 452
 453         /* WINS functions */
 454
 455         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 456
 457         /* End of list */
 458
 459         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 460 };
 461
 462 struct winbindd_async_dispatch_table {
 463         enum winbindd_cmd cmd;
 464         const char *cmd_name;
 465         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 466                                        struct tevent_context *ev,
 467                                        struct winbindd_cli_state *cli,
 468                                        struct winbindd_request *request);
 469         NTSTATUS (*recv_req)(struct tevent_req *req,
 470                              struct winbindd_response *presp);
 471 };
 472
 473 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 474         { WINBINDD_PING, "PING",
 475           wb_ping_send, wb_ping_recv },
 476         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 477           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 478         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 479           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 480         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 481           winbindd_lookupname_send, winbindd_lookupname_recv },
 482         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 483           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 484         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 485           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 486         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 487           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 488         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 489           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 490         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 491           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 492         { WINBINDD_GETPWSID, "GETPWSID",
 493           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 494         { WINBINDD_GETPWNAM, "GETPWNAM",
 495           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 496         { WINBINDD_GETPWUID, "GETPWUID",
 497           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 498         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 499           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 500         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 501           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 502         { WINBINDD_GETGROUPS, "GETGROUPS",
 503           winbindd_getgroups_send, winbindd_getgroups_recv },
 504         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 505           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 506         { WINBINDD_GETGRGID, "GETGRGID",
 507           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 508         { WINBINDD_GETGRNAM, "GETGRNAM",
 509           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 510         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 511           winbindd_getusersids_send, winbindd_getusersids_recv },
 512         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 513           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 514         { WINBINDD_SETPWENT, "SETPWENT",
 515           winbindd_setpwent_send, winbindd_setpwent_recv },
 516         { WINBINDD_GETPWENT, "GETPWENT",
 517           winbindd_getpwent_send, winbindd_getpwent_recv },
 518         { WINBINDD_ENDPWENT, "ENDPWENT",
 519           winbindd_endpwent_send, winbindd_endpwent_recv },
 520         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 521           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 522         { WINBINDD_GETDCNAME, "GETDCNAME",
 523           winbindd_getdcname_send, winbindd_getdcname_recv },
 524         { WINBINDD_SETGRENT, "SETGRENT",
 525           winbindd_setgrent_send, winbindd_setgrent_recv },
 526         { WINBINDD_GETGRENT, "GETGRENT",
 527           winbindd_getgrent_send, winbindd_getgrent_recv },
 528         { WINBINDD_ENDGRENT, "ENDGRENT",
 529           winbindd_endgrent_send, winbindd_endgrent_recv },
 530         { WINBINDD_LIST_USERS, "LIST_USERS",
 531           winbindd_list_users_send, winbindd_list_users_recv },
 532         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 533           winbindd_list_groups_send, winbindd_list_groups_recv },
 534         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 535           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 536         { WINBINDD_PING_DC, "PING_DC",
 537           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 538         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 539           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 540         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 541           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 542         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 543           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 544         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 545           winbindd_pam_chng_pswd_auth_crap_send,
 546           winbindd_pam_chng_pswd_auth_crap_recv },
 547         { WINBINDD_WINS_BYIP, "PING",
 548           winbindd_wins_byip_send, winbindd_wins_byip_recv },
 549
 550         { 0, NULL, NULL, NULL }
 551 };
 552
 553 static struct winbindd_async_dispatch_table async_priv_table[] = {
 554         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 555           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 556         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 557           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 558         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 559           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 560         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 561           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 562
 563         { 0, NULL, NULL, NULL }
 564 };
 565
 566 static void wb_request_done(struct tevent_req *req);
 567
 568 static void process_request(struct winbindd_cli_state *state)
 569 {
 570         struct winbindd_dispatch_table *table = dispatch_table;
 571         struct winbindd_async_dispatch_table *atable;
 572
 573         state->mem_ctx = talloc_named(state, 0, "winbind request");
 574         if (state->mem_ctx == NULL)
 575                 return;
 576
 577         /* Remember who asked us. */
 578         state->pid = state->request->pid;
 579
 580         state->cmd_name = "unknown request";
 581         state->recv_fn = NULL;
 582
 583         /* Process command */
 584
 585         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 586                 if (state->request->cmd == atable->cmd) {
 587                         break;
 588                 }
 589         }
 590
 591         if ((atable->send_req == NULL) && state->privileged) {
 592                 for (atable = async_priv_table; atable->send_req;
 593                      atable += 1) {
 594                         if (state->request->cmd == atable->cmd) {
 595                                 break;
 596                         }
 597                 }
 598         }
 599
 600         if (atable->send_req != NULL) {
 601                 struct tevent_req *req;
 602
 603                 state->cmd_name = atable->cmd_name;
 604                 state->recv_fn = atable->recv_req;
 605
 606                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 607                            (int)state->pid, state->cmd_name));
 608
 609                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 610                                        state, state->request);
 611                 if (req == NULL) {
 612                         DEBUG(0, ("process_request: atable->send failed for "
 613                                   "%s\n", atable->cmd_name));
 614                         request_error(state);
 615                         return;
 616                 }
 617                 tevent_req_set_callback(req, wb_request_done, state);
 618                 return;
 619         }
 620
 621         state->response = talloc_zero(state->mem_ctx,
 622                                       struct winbindd_response);
 623         if (state->response == NULL) {
 624                 DEBUG(10, ("talloc failed\n"));
 625                 remove_client(state);
 626                 return;
 627         }
 628         state->response->result = WINBINDD_PENDING;
 629         state->response->length = sizeof(struct winbindd_response);
 630
 631         for (table = dispatch_table; table->fn; table++) {
 632                 if (state->request->cmd == table->cmd) {
 633                         DEBUG(10,("process_request: request fn %s\n",
 634                                   table->winbindd_cmd_name ));
 635                         state->cmd_name = table->winbindd_cmd_name;
 636                         table->fn(state);
 637                         break;
 638                 }
 639         }
 640
 641         if (!table->fn) {
 642                 DEBUG(10,("process_request: unknown request fn number %d\n",
 643                           (int)state->request->cmd ));
 644                 request_error(state);
 645         }
 646 }
 647
 648 static void wb_request_done(struct tevent_req *req)
 649 {
 650         struct winbindd_cli_state *state = tevent_req_callback_data(
 651                 req, struct winbindd_cli_state);
 652         NTSTATUS status;
 653
 654         state->response = talloc_zero(state->mem_ctx,
 655                                       struct winbindd_response);
 656         if (state->response == NULL) {
 657                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 658                           (int)state->pid, state->cmd_name));
 659                 remove_client(state);
 660                 return;
 661         }
 662         state->response->result = WINBINDD_PENDING;
 663         state->response->length = sizeof(struct winbindd_response);
 664
 665         status = state->recv_fn(req, state->response);
 666         TALLOC_FREE(req);
 667
 668         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 669                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 670
 671         if (!NT_STATUS_IS_OK(status)) {
 672                 request_error(state);
 673                 return;
 674         }
 675         request_ok(state);
 676 }
 677
 678 /*
 679  * This is the main event loop of winbind requests. It goes through a
 680  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 681  *
 682  * An idle winbind client has a read request of 4 bytes outstanding,
 683  * finalizing function is request_len_recv, checking the length. request_recv
 684  * then processes the packet. The processing function then at some point has
 685  * to call request_finished which schedules sending the response.
 686  */
 687
 688 static void request_finished(struct winbindd_cli_state *state);
 689
 690 static void winbind_client_request_read(struct tevent_req *req);
 691 static void winbind_client_response_written(struct tevent_req *req);
 692
 693 static void request_finished(struct winbindd_cli_state *state)
 694 {
 695         struct tevent_req *req;
 696
 697         TALLOC_FREE(state->request);
 698
 699         req = wb_resp_write_send(state, winbind_event_context(),
 700                                  state->out_queue, state->sock,
 701                                  state->response);
 702         if (req == NULL) {
 703                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 704                           (int)state->pid, state->cmd_name));
 705                 remove_client(state);
 706                 return;
 707         }
 708         tevent_req_set_callback(req, winbind_client_response_written, state);
 709 }
 710
 711 static void winbind_client_response_written(struct tevent_req *req)
 712 {
 713         struct winbindd_cli_state *state = tevent_req_callback_data(
 714                 req, struct winbindd_cli_state);
 715         ssize_t ret;
 716         int err;
 717
 718         ret = wb_resp_write_recv(req, &err);
 719         TALLOC_FREE(req);
 720         if (ret == -1) {
 721                 close(state->sock);
 722                 state->sock = -1;
 723                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 724                           (int)state->pid, state->cmd_name, strerror(err)));
 725                 remove_client(state);
 726                 return;
 727         }
 728
 729         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 730                   "to client\n", (int)state->pid, state->cmd_name));
 731
 732         TALLOC_FREE(state->mem_ctx);
 733         state->response = NULL;
 734         state->cmd_name = "no request";
 735         state->recv_fn = NULL;
 736
 737         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 738                                WINBINDD_MAX_EXTRA_DATA);
 739         if (req == NULL) {
 740                 remove_client(state);
 741                 return;
 742         }
 743         tevent_req_set_callback(req, winbind_client_request_read, state);
 744 }
 745
 746 void request_error(struct winbindd_cli_state *state)
 747 {
 748         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 749         state->response->result = WINBINDD_ERROR;
 750         request_finished(state);
 751 }
 752
 753 void request_ok(struct winbindd_cli_state *state)
 754 {
 755         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 756         state->response->result = WINBINDD_OK;
 757         request_finished(state);
 758 }
 759
 760 /* Process a new connection by adding it to the client connection list */
 761
 762 static void new_connection(int listen_sock, bool privileged)
 763 {
 764         struct sockaddr_un sunaddr;
 765         struct winbindd_cli_state *state;
 766         struct tevent_req *req;
 767         socklen_t len;
 768         int sock;
 769
 770         /* Accept connection */
 771
 772         len = sizeof(sunaddr);
 773
 774         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 775
 776         if (sock == -1) {
 777                 if (errno != EINTR) {
 778                         DEBUG(0, ("Faild to accept socket - %s\n",
 779                                   strerror(errno)));
 780                 }
 781                 return;
 782         }
 783
 784         DEBUG(6,("accepted socket %d\n", sock));
 785
 786         /* Create new connection structure */
 787
 788         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 789                 close(sock);
 790                 return;
 791         }
 792
 793         state->sock = sock;
 794
 795         state->out_queue = tevent_queue_create(state, "winbind client reply");
 796         if (state->out_queue == NULL) {
 797                 close(sock);
 798                 TALLOC_FREE(state);
 799                 return;
 800         }
 801
 802         state->last_access = time(NULL);
 803
 804         state->privileged = privileged;
 805
 806         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 807                                WINBINDD_MAX_EXTRA_DATA);
 808         if (req == NULL) {
 809                 TALLOC_FREE(state);
 810                 close(sock);
 811                 return;
 812         }
 813         tevent_req_set_callback(req, winbind_client_request_read, state);
 814
 815         /* Add to connection list */
 816
 817         winbindd_add_client(state);
 818 }
 819
 820 static void winbind_client_request_read(struct tevent_req *req)
 821 {
 822         struct winbindd_cli_state *state = tevent_req_callback_data(
 823                 req, struct winbindd_cli_state);
 824         ssize_t ret;
 825         int err;
 826
 827         ret = wb_req_read_recv(req, state, &state->request, &err);
 828         TALLOC_FREE(req);
 829         if (ret == -1) {
 830                 if (err == EPIPE) {
 831                         DEBUG(6, ("closing socket %d, client exited\n",
 832                                   state->sock));
 833                 } else {
 834                         DEBUG(2, ("Could not read client request from fd %d: "
 835                                   "%s\n", state->sock, strerror(err)));
 836                 }
 837                 close(state->sock);
 838                 state->sock = -1;
 839                 remove_client(state);
 840                 return;
 841         }
 842         process_request(state);
 843 }
 844
 845 /* Remove a client connection from client connection list */
 846
 847 static void remove_client(struct winbindd_cli_state *state)
 848 {
 849         char c = 0;
 850         int nwritten;
 851
 852         /* It's a dead client - hold a funeral */
 853
 854         if (state == NULL) {
 855                 return;
 856         }
 857
 858         if (state->sock != -1) {
 859                 /* tell client, we are closing ... */
 860                 nwritten = write(state->sock, &c, sizeof(c));
 861                 if (nwritten == -1) {
 862                         DEBUG(2, ("final write to client failed: %s\n",
 863                                 strerror(errno)));
 864                 }
 865
 866                 /* Close socket */
 867
 868                 close(state->sock);
 869                 state->sock = -1;
 870         }
 871
 872         TALLOC_FREE(state->mem_ctx);
 873
 874         /* Remove from list and free */
 875
 876         winbindd_remove_client(state);
 877         TALLOC_FREE(state);
 878 }
 879
 880 /* Is a client idle? */
 881
 882 static bool client_is_idle(struct winbindd_cli_state *state) {
 883   return (state->response == NULL &&
 884           !state->pwent_state && !state->grent_state);
 885 }
 886
 887 /* Shutdown client connection which has been idle for the longest time */
 888
 889 static bool remove_idle_client(void)
 890 {
 891         struct winbindd_cli_state *state, *remove_state = NULL;
 892         time_t last_access = 0;
 893         int nidle = 0;
 894
 895         for (state = winbindd_client_list(); state; state = state->next) {
 896                 if (client_is_idle(state)) {
 897                         nidle++;
 898                         if (!last_access || state->last_access < last_access) {
 899                                 last_access = state->last_access;
 900                                 remove_state = state;
 901                         }
 902                 }
 903         }
 904
 905         if (remove_state) {
 906                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 907                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 908                 remove_client(remove_state);
 909                 return True;
 910         }
 911
 912         return False;
 913 }
 914
 915 struct winbindd_listen_state {
 916         bool privileged;
 917         int fd;
 918 };
 919
 920 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 921                                         struct tevent_fd *fde,
 922                                         uint16_t flags,
 923                                         void *private_data)
 924 {
 925         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 926                                           struct winbindd_listen_state);
 927
 928         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 929                 DEBUG(5,("winbindd: Exceeding %d client "
 930                          "connections, removing idle "
 931                          "connection.\n", lp_winbind_max_clients()));
 932                 if (!remove_idle_client()) {
 933                         DEBUG(0,("winbindd: Exceeding %d "
 934                                  "client connections, no idle "
 935                                  "connection found\n",
 936                                  lp_winbind_max_clients()));
 937                         break;
 938                 }
 939         }
 940         new_connection(s->fd, s->privileged);
 941 }
 942
 943 /*
 944  * Winbindd socket accessor functions
 945  */
 946
 947 const char *get_winbind_pipe_dir(void)
 948 {
 949         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 950 }
 951
 952 char *get_winbind_priv_pipe_dir(void)
 953 {
 954         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 955 }
 956
 957 static bool winbindd_setup_listeners(void)
 958 {
 959         struct winbindd_listen_state *pub_state = NULL;
 960         struct winbindd_listen_state *priv_state = NULL;
 961         struct tevent_fd *fde;
 962
 963         pub_state = talloc(winbind_event_context(),
 964                            struct winbindd_listen_state);
 965         if (!pub_state) {
 966                 goto failed;
 967         }
 968
 969         pub_state->privileged = false;
 970         pub_state->fd = create_pipe_sock(
 971                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 972         if (pub_state->fd == -1) {
 973                 goto failed;
 974         }
 975
 976         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 977                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 978                             pub_state);
 979         if (fde == NULL) {
 980                 close(pub_state->fd);
 981                 goto failed;
 982         }
 983         tevent_fd_set_auto_close(fde);
 984
 985         priv_state = talloc(winbind_event_context(),
 986                             struct winbindd_listen_state);
 987         if (!priv_state) {
 988                 goto failed;
 989         }
 990
 991         priv_state->privileged = true;
 992         priv_state->fd = create_pipe_sock(
 993                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 994         if (priv_state->fd == -1) {
 995                 goto failed;
 996         }
 997
 998         fde = tevent_add_fd(winbind_event_context(), priv_state,
 999                             priv_state->fd, TEVENT_FD_READ,
1000                             winbindd_listen_fde_handler, priv_state);
1001         if (fde == NULL) {
1002                 close(priv_state->fd);
1003                 goto failed;
1004         }
1005         tevent_fd_set_auto_close(fde);
1006
1007         return true;
1008 failed:
1009         TALLOC_FREE(pub_state);
1010         TALLOC_FREE(priv_state);
1011         return false;
1012 }
1013
1014 bool winbindd_use_idmap_cache(void)
1015 {
1016         return !opt_nocache;
1017 }
1018
1019 bool winbindd_use_cache(void)
1020 {
1021         return !opt_nocache;
1022 }
1023
1024 void winbindd_register_handlers(void)
1025 {
1026         /* Setup signal handlers */
1027
1028         if (!winbindd_setup_sig_term_handler(true))
1029                 exit(1);
1030         if (!winbindd_setup_sig_hup_handler(NULL))
1031                 exit(1);
1032         if (!winbindd_setup_sig_chld_handler())
1033                 exit(1);
1034         if (!winbindd_setup_sig_usr2_handler())
1035                 exit(1);
1036
1037         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1038
1039         /*
1040          * Ensure all cache and idmap caches are consistent
1041          * and initialized before we startup.
1042          */
1043         if (!winbindd_cache_validate_and_initialize()) {
1044                 exit(1);
1045         }
1046
1047         /* get broadcast messages */
1048
1049         if (!serverid_register(procid_self(),
1050                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1051                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1052                 exit(1);
1053         }
1054
1055         /* React on 'smbcontrol winbindd reload-config' in the same way
1056            as to SIGHUP signal */
1057         messaging_register(winbind_messaging_context(), NULL,
1058                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1059         messaging_register(winbind_messaging_context(), NULL,
1060                            MSG_SHUTDOWN, msg_shutdown);
1061
1062         /* Handle online/offline messages. */
1063         messaging_register(winbind_messaging_context(), NULL,
1064                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1065         messaging_register(winbind_messaging_context(), NULL,
1066                            MSG_WINBIND_ONLINE, winbind_msg_online);
1067         messaging_register(winbind_messaging_context(), NULL,
1068                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1069
1070         messaging_register(winbind_messaging_context(), NULL,
1071                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1072
1073         messaging_register(winbind_messaging_context(), NULL,
1074                            MSG_WINBIND_VALIDATE_CACHE,
1075                            winbind_msg_validate_cache);
1076
1077         messaging_register(winbind_messaging_context(), NULL,
1078                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1079                            winbind_msg_dump_domain_list);
1080
1081         messaging_register(winbind_messaging_context(), NULL,
1082                            MSG_WINBIND_IP_DROPPED,
1083                            winbind_msg_ip_dropped_parent);
1084
1085         /* Register handler for MSG_DEBUG. */
1086         messaging_register(winbind_messaging_context(), NULL,
1087                            MSG_DEBUG,
1088                            winbind_msg_debug);
1089
1090         netsamlogon_cache_init(); /* Non-critical */
1091
1092         /* clear the cached list of trusted domains */
1093
1094         wcache_tdc_clear();
1095
1096         if (!init_domain_list()) {
1097                 DEBUG(0,("unable to initialize domain list\n"));
1098                 exit(1);
1099         }
1100
1101         init_idmap_child();
1102         init_locator_child();
1103
1104         smb_nscd_flush_user_cache();
1105         smb_nscd_flush_group_cache();
1106
1107         if (lp_allow_trusted_domains()) {
1108                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1109                               rescan_trusted_domains, NULL) == NULL) {
1110                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1111                         exit(1);
1112                 }
1113         }
1114
1115 }
1116
1117 struct winbindd_addrchanged_state {
1118         struct addrchange_context *ctx;
1119         struct tevent_context *ev;
1120         struct messaging_context *msg_ctx;
1121 };
1122
1123 static void winbindd_addr_changed(struct tevent_req *req);
1124
1125 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1126                                      struct tevent_context *ev,
1127                                      struct messaging_context *msg_ctx)
1128 {
1129         struct winbindd_addrchanged_state *state;
1130         struct tevent_req *req;
1131         NTSTATUS status;
1132
1133         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1134         if (state == NULL) {
1135                 DEBUG(10, ("talloc failed\n"));
1136                 return;
1137         }
1138         state->ev = ev;
1139         state->msg_ctx = msg_ctx;
1140
1141         status = addrchange_context_create(state, &state->ctx);
1142         if (!NT_STATUS_IS_OK(status)) {
1143                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1144                            nt_errstr(status)));
1145                 TALLOC_FREE(state);
1146                 return;
1147         }
1148         req = addrchange_send(state, ev, state->ctx);
1149         if (req == NULL) {
1150                 DEBUG(0, ("addrchange_send failed\n"));
1151                 TALLOC_FREE(state);
1152                 return;
1153         }
1154         tevent_req_set_callback(req, winbindd_addr_changed, state);
1155 }
1156
1157 static void winbindd_addr_changed(struct tevent_req *req)
1158 {
1159         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1160                 req, struct winbindd_addrchanged_state);
1161         enum addrchange_type type;
1162         struct sockaddr_storage addr;
1163         NTSTATUS status;
1164
1165         status = addrchange_recv(req, &type, &addr);
1166         TALLOC_FREE(req);
1167         if (!NT_STATUS_IS_OK(status)) {
1168                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1169                            nt_errstr(status)));
1170                 TALLOC_FREE(state);
1171                 return;
1172         }
1173         if (type == ADDRCHANGE_DEL) {
1174                 char addrstr[INET6_ADDRSTRLEN];
1175                 DATA_BLOB blob;
1176
1177                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1178
1179                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1180                           addrstr));
1181
1182                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1183
1184                 status = messaging_send(state->msg_ctx,
1185                                         messaging_server_id(state->msg_ctx),
1186                                         MSG_WINBIND_IP_DROPPED, &blob);
1187                 if (!NT_STATUS_IS_OK(status)) {
1188                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1189                                    nt_errstr(status)));
1190                 }
1191         }
1192         req = addrchange_send(state, state->ev, state->ctx);
1193         if (req == NULL) {
1194                 DEBUG(0, ("addrchange_send failed\n"));
1195                 TALLOC_FREE(state);
1196                 return;
1197         }
1198         tevent_req_set_callback(req, winbindd_addr_changed, state);
1199 }
1200
1201 /* Main function */
1202
1203 int main(int argc, char **argv, char **envp)
1204 {
1205         static bool is_daemon = False;
1206         static bool Fork = True;
1207         static bool log_stdout = False;
1208         static bool no_process_group = False;
1209         enum {
1210                 OPT_DAEMON = 1000,
1211                 OPT_FORK,
1212                 OPT_NO_PROCESS_GROUP,
1213                 OPT_LOG_STDOUT
1214         };
1215         struct poptOption long_options[] = {
1216                 POPT_AUTOHELP
1217                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1218                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1219                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1220                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1221                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1222                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1223                 POPT_COMMON_SAMBA
1224                 POPT_TABLEEND
1225         };
1226         poptContext pc;
1227         int opt;
1228         TALLOC_CTX *frame;
1229         NTSTATUS status;
1230
1231         /*
1232          * Do this before any other talloc operation
1233          */
1234         talloc_enable_null_tracking();
1235         frame = talloc_stackframe();
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         if (log_stdout) {
1322                 setup_logging("winbindd", DEBUG_STDOUT);
1323         } else {
1324                 setup_logging("winbindd", DEBUG_FILE);
1325         }
1326         reopen_logs();
1327
1328         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1329         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1330
1331         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1332                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1333                 exit(1);
1334         }
1335
1336         /* Initialise messaging system */
1337
1338         if (winbind_messaging_context() == NULL) {
1339                 exit(1);
1340         }
1341
1342         if (!reload_services_file(NULL)) {
1343                 DEBUG(0, ("error opening config file\n"));
1344                 exit(1);
1345         }
1346
1347         if (!directory_exist(lp_lockdir())) {
1348                 mkdir(lp_lockdir(), 0755);
1349         }
1350
1351         /* Setup names. */
1352
1353         if (!init_names())
1354                 exit(1);
1355
1356         load_interfaces();
1357
1358         if (!secrets_init()) {
1359
1360                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1361                 return False;
1362         }
1363
1364         /* Unblock all signals we are interested in as they may have been
1365            blocked by the parent process. */
1366
1367         BlockSignals(False, SIGINT);
1368         BlockSignals(False, SIGQUIT);
1369         BlockSignals(False, SIGTERM);
1370         BlockSignals(False, SIGUSR1);
1371         BlockSignals(False, SIGUSR2);
1372         BlockSignals(False, SIGHUP);
1373         BlockSignals(False, SIGCHLD);
1374
1375         if (!interactive)
1376                 become_daemon(Fork, no_process_group, log_stdout);
1377
1378         pidfile_create("winbindd");
1379
1380 #if HAVE_SETPGID
1381         /*
1382          * If we're interactive we want to set our own process group for
1383          * signal management.
1384          */
1385         if (interactive && !no_process_group)
1386                 setpgid( (pid_t)0, (pid_t)0);
1387 #endif
1388
1389         TimeInit();
1390
1391         /* Don't use winbindd_reinit_after_fork here as
1392          * we're just starting up and haven't created any
1393          * winbindd-specific resources we must free yet. JRA.
1394          */
1395
1396         status = reinit_after_fork(winbind_messaging_context(),
1397                                    winbind_event_context(),
1398                                    procid_self(), false);
1399         if (!NT_STATUS_IS_OK(status)) {
1400                 DEBUG(0,("reinit_after_fork() failed\n"));
1401                 exit(1);
1402         }
1403
1404         winbindd_register_handlers();
1405
1406         status = init_system_info();
1407         if (!NT_STATUS_IS_OK(status)) {
1408                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1409                           nt_errstr(status)));
1410                 exit(1);
1411         }
1412
1413         rpc_lsarpc_init(NULL);
1414         rpc_samr_init(NULL);
1415
1416         winbindd_init_addrchange(NULL, winbind_event_context(),
1417                                  winbind_messaging_context());
1418
1419         /* setup listen sockets */
1420
1421         if (!winbindd_setup_listeners()) {
1422                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1423                 exit(1);
1424         }
1425
1426         TALLOC_FREE(frame);
1427         /* Loop waiting for requests */
1428         while (1) {
1429                 frame = talloc_stackframe();
1430
1431                 if (tevent_loop_once(winbind_event_context()) == -1) {
1432                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1433                                   strerror(errno)));
1434                         return 1;
1435                 }
1436
1437                 TALLOC_FREE(frame);
1438         }
1439
1440         return 0;
1441 }