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 /**************************************************************************** **
  92  Handle a fault..
  93  **************************************************************************** */
  94
  95 static void fault_quit(void)
  96 {
  97         dump_core();
  98 }
  99
 100 static void winbindd_status(void)
 101 {
 102         struct winbindd_cli_state *tmp;
 103
 104         DEBUG(0, ("winbindd status:\n"));
 105
 106         /* Print client state information */
 107
 108         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 109
 110         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 111                 DEBUG(2, ("\tclient list:\n"));
 112                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 113                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 114                                      (unsigned long)tmp->pid, tmp->sock,
 115                                      client_is_idle(tmp) ? "idle" : "active"));
 116                 }
 117         }
 118 }
 119
 120 /* Flush client cache */
 121
 122 static void flush_caches(void)
 123 {
 124         /* We need to invalidate cached user list entries on a SIGHUP
 125            otherwise cached access denied errors due to restrict anonymous
 126            hang around until the sequence number changes. */
 127
 128         if (!wcache_invalidate_cache()) {
 129                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 130                 if (!winbindd_cache_validate_and_initialize()) {
 131                         exit(1);
 132                 }
 133         }
 134 }
 135
 136 static void flush_caches_noinit(void)
 137 {
 138         /*
 139          * We need to invalidate cached user list entries on a SIGHUP
 140          * otherwise cached access denied errors due to restrict anonymous
 141          * hang around until the sequence number changes.
 142          * NB
 143          * Skip uninitialized domains when flush cache.
 144          * If domain is not initialized, it means it is never
 145          * used or never become online. look, wcache_invalidate_cache()
 146          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 147          * for unused domains and large traffic for primay domain's DC if there
 148          * are many domains..
 149          */
 150
 151         if (!wcache_invalidate_cache_noinit()) {
 152                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 153                 if (!winbindd_cache_validate_and_initialize()) {
 154                         exit(1);
 155                 }
 156         }
 157 }
 158
 159 /* Handle the signal by unlinking socket and exiting */
 160
 161 static void terminate(bool is_parent)
 162 {
 163         if (is_parent) {
 164                 /* When parent goes away we should
 165                  * remove the socket file. Not so
 166                  * when children terminate.
 167                  */
 168                 char *path = NULL;
 169
 170                 if (asprintf(&path, "%s/%s",
 171                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 172                         unlink(path);
 173                         SAFE_FREE(path);
 174                 }
 175         }
 176
 177         idmap_close();
 178
 179         trustdom_cache_shutdown();
 180
 181         gencache_stabilize();
 182
 183 #if 0
 184         if (interactive) {
 185                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 186                 char *description = talloc_describe_all(mem_ctx);
 187
 188                 DEBUG(3, ("tallocs left:\n%s\n", description));
 189                 talloc_destroy(mem_ctx);
 190         }
 191 #endif
 192
 193         if (is_parent) {
 194                 serverid_deregister(procid_self());
 195                 pidfile_unlink();
 196         }
 197
 198         exit(0);
 199 }
 200
 201 static void winbindd_sig_term_handler(struct tevent_context *ev,
 202                                       struct tevent_signal *se,
 203                                       int signum,
 204                                       int count,
 205                                       void *siginfo,
 206                                       void *private_data)
 207 {
 208         bool *is_parent = talloc_get_type_abort(private_data, bool);
 209
 210         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 211                  signum, (int)*is_parent));
 212         terminate(*is_parent);
 213 }
 214
 215 bool winbindd_setup_sig_term_handler(bool parent)
 216 {
 217         struct tevent_signal *se;
 218         bool *is_parent;
 219
 220         is_parent = talloc(winbind_event_context(), bool);
 221         if (!is_parent) {
 222                 return false;
 223         }
 224
 225         *is_parent = parent;
 226
 227         se = tevent_add_signal(winbind_event_context(),
 228                                is_parent,
 229                                SIGTERM, 0,
 230                                winbindd_sig_term_handler,
 231                                is_parent);
 232         if (!se) {
 233                 DEBUG(0,("failed to setup SIGTERM handler"));
 234                 talloc_free(is_parent);
 235                 return false;
 236         }
 237
 238         se = tevent_add_signal(winbind_event_context(),
 239                                is_parent,
 240                                SIGINT, 0,
 241                                winbindd_sig_term_handler,
 242                                is_parent);
 243         if (!se) {
 244                 DEBUG(0,("failed to setup SIGINT handler"));
 245                 talloc_free(is_parent);
 246                 return false;
 247         }
 248
 249         se = tevent_add_signal(winbind_event_context(),
 250                                is_parent,
 251                                SIGQUIT, 0,
 252                                winbindd_sig_term_handler,
 253                                is_parent);
 254         if (!se) {
 255                 DEBUG(0,("failed to setup SIGINT handler"));
 256                 talloc_free(is_parent);
 257                 return false;
 258         }
 259
 260         return true;
 261 }
 262
 263 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 264                                      struct tevent_signal *se,
 265                                      int signum,
 266                                      int count,
 267                                      void *siginfo,
 268                                      void *private_data)
 269 {
 270         const char *file = (const char *)private_data;
 271
 272         DEBUG(1,("Reloading services after SIGHUP\n"));
 273         flush_caches_noinit();
 274         reload_services_file(file);
 275 }
 276
 277 bool winbindd_setup_sig_hup_handler(const char *lfile)
 278 {
 279         struct tevent_signal *se;
 280         char *file = NULL;
 281
 282         if (lfile) {
 283                 file = talloc_strdup(winbind_event_context(),
 284                                      lfile);
 285                 if (!file) {
 286                         return false;
 287                 }
 288         }
 289
 290         se = tevent_add_signal(winbind_event_context(),
 291                                winbind_event_context(),
 292                                SIGHUP, 0,
 293                                winbindd_sig_hup_handler,
 294                                file);
 295         if (!se) {
 296                 return false;
 297         }
 298
 299         return true;
 300 }
 301
 302 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 303                                       struct tevent_signal *se,
 304                                       int signum,
 305                                       int count,
 306                                       void *siginfo,
 307                                       void *private_data)
 308 {
 309         pid_t pid;
 310
 311         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 312                 winbind_child_died(pid);
 313         }
 314 }
 315
 316 static bool winbindd_setup_sig_chld_handler(void)
 317 {
 318         struct tevent_signal *se;
 319
 320         se = tevent_add_signal(winbind_event_context(),
 321                                winbind_event_context(),
 322                                SIGCHLD, 0,
 323                                winbindd_sig_chld_handler,
 324                                NULL);
 325         if (!se) {
 326                 return false;
 327         }
 328
 329         return true;
 330 }
 331
 332 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 333                                       struct tevent_signal *se,
 334                                       int signum,
 335                                       int count,
 336                                       void *siginfo,
 337                                       void *private_data)
 338 {
 339         winbindd_status();
 340 }
 341
 342 static bool winbindd_setup_sig_usr2_handler(void)
 343 {
 344         struct tevent_signal *se;
 345
 346         se = tevent_add_signal(winbind_event_context(),
 347                                winbind_event_context(),
 348                                SIGUSR2, 0,
 349                                winbindd_sig_usr2_handler,
 350                                NULL);
 351         if (!se) {
 352                 return false;
 353         }
 354
 355         return true;
 356 }
 357
 358 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 359 static void msg_reload_services(struct messaging_context *msg,
 360                                 void *private_data,
 361                                 uint32_t msg_type,
 362                                 struct server_id server_id,
 363                                 DATA_BLOB *data)
 364 {
 365         /* Flush various caches */
 366         flush_caches();
 367         reload_services_file((const char *) private_data);
 368 }
 369
 370 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 371 static void msg_shutdown(struct messaging_context *msg,
 372                          void *private_data,
 373                          uint32_t msg_type,
 374                          struct server_id server_id,
 375                          DATA_BLOB *data)
 376 {
 377         /* only the parent waits for this message */
 378         DEBUG(0,("Got shutdown message\n"));
 379         terminate(true);
 380 }
 381
 382
 383 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 384                                        void *private_data,
 385                                        uint32_t msg_type,
 386                                        struct server_id server_id,
 387                                        DATA_BLOB *data)
 388 {
 389         uint8 ret;
 390         pid_t child_pid;
 391         NTSTATUS status;
 392
 393         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 394                    "message.\n"));
 395
 396         /*
 397          * call the validation code from a child:
 398          * so we don't block the main winbindd and the validation
 399          * code can safely use fork/waitpid...
 400          */
 401         child_pid = sys_fork();
 402
 403         if (child_pid == -1) {
 404                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 405                           strerror(errno)));
 406                 return;
 407         }
 408
 409         if (child_pid != 0) {
 410                 /* parent */
 411                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 412                           "pid %d.\n", (int)child_pid));
 413                 return;
 414         }
 415
 416         /* child */
 417
 418         status = winbindd_reinit_after_fork(NULL, NULL);
 419         if (!NT_STATUS_IS_OK(status)) {
 420                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 421                           nt_errstr(status)));
 422                 _exit(0);
 423         }
 424
 425         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 426         CatchSignal(SIGCHLD, SIG_DFL);
 427
 428         ret = (uint8)winbindd_validate_cache_nobackup();
 429         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 430         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 431                            (size_t)1);
 432         _exit(0);
 433 }
 434
 435 static struct winbindd_dispatch_table {
 436         enum winbindd_cmd cmd;
 437         void (*fn)(struct winbindd_cli_state *state);
 438         const char *winbindd_cmd_name;
 439 } dispatch_table[] = {
 440
 441         /* Enumeration functions */
 442
 443         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 444           "LIST_TRUSTDOM" },
 445
 446         /* Miscellaneous */
 447
 448         { WINBINDD_INFO, winbindd_info, "INFO" },
 449         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 450           "INTERFACE_VERSION" },
 451         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 452         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 453         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 454         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 455         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 456           "WINBINDD_PRIV_PIPE_DIR" },
 457
 458         /* Credential cache access */
 459         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 460         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 461
 462         /* WINS functions */
 463
 464         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 465         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 466
 467         /* End of list */
 468
 469         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 470 };
 471
 472 struct winbindd_async_dispatch_table {
 473         enum winbindd_cmd cmd;
 474         const char *cmd_name;
 475         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 476                                        struct tevent_context *ev,
 477                                        struct winbindd_cli_state *cli,
 478                                        struct winbindd_request *request);
 479         NTSTATUS (*recv_req)(struct tevent_req *req,
 480                              struct winbindd_response *presp);
 481 };
 482
 483 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 484         { WINBINDD_PING, "PING",
 485           wb_ping_send, wb_ping_recv },
 486         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 487           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 488         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 489           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 490         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 491           winbindd_lookupname_send, winbindd_lookupname_recv },
 492         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 493           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 494         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 495           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 496         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 497           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 498         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 499           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 500         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 501           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 502         { WINBINDD_GETPWSID, "GETPWSID",
 503           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 504         { WINBINDD_GETPWNAM, "GETPWNAM",
 505           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 506         { WINBINDD_GETPWUID, "GETPWUID",
 507           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 508         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 509           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 510         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 511           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 512         { WINBINDD_GETGROUPS, "GETGROUPS",
 513           winbindd_getgroups_send, winbindd_getgroups_recv },
 514         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 515           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 516         { WINBINDD_GETGRGID, "GETGRGID",
 517           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 518         { WINBINDD_GETGRNAM, "GETGRNAM",
 519           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 520         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 521           winbindd_getusersids_send, winbindd_getusersids_recv },
 522         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 523           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 524         { WINBINDD_SETPWENT, "SETPWENT",
 525           winbindd_setpwent_send, winbindd_setpwent_recv },
 526         { WINBINDD_GETPWENT, "GETPWENT",
 527           winbindd_getpwent_send, winbindd_getpwent_recv },
 528         { WINBINDD_ENDPWENT, "ENDPWENT",
 529           winbindd_endpwent_send, winbindd_endpwent_recv },
 530         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 531           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 532         { WINBINDD_GETDCNAME, "GETDCNAME",
 533           winbindd_getdcname_send, winbindd_getdcname_recv },
 534         { WINBINDD_SETGRENT, "SETGRENT",
 535           winbindd_setgrent_send, winbindd_setgrent_recv },
 536         { WINBINDD_GETGRENT, "GETGRENT",
 537           winbindd_getgrent_send, winbindd_getgrent_recv },
 538         { WINBINDD_ENDGRENT, "ENDGRENT",
 539           winbindd_endgrent_send, winbindd_endgrent_recv },
 540         { WINBINDD_LIST_USERS, "LIST_USERS",
 541           winbindd_list_users_send, winbindd_list_users_recv },
 542         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 543           winbindd_list_groups_send, winbindd_list_groups_recv },
 544         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 545           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 546         { WINBINDD_PING_DC, "PING_DC",
 547           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 548         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 549           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 550         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 551           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 552         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 553           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 554         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 555           winbindd_pam_chng_pswd_auth_crap_send,
 556           winbindd_pam_chng_pswd_auth_crap_recv },
 557
 558         { 0, NULL, NULL, NULL }
 559 };
 560
 561 static struct winbindd_async_dispatch_table async_priv_table[] = {
 562         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 563           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 564         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 565           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 566         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 567           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 568         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 569           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 570
 571         { 0, NULL, NULL, NULL }
 572 };
 573
 574 static void wb_request_done(struct tevent_req *req);
 575
 576 static void process_request(struct winbindd_cli_state *state)
 577 {
 578         struct winbindd_dispatch_table *table = dispatch_table;
 579         struct winbindd_async_dispatch_table *atable;
 580
 581         state->mem_ctx = talloc_named(state, 0, "winbind request");
 582         if (state->mem_ctx == NULL)
 583                 return;
 584
 585         /* Remember who asked us. */
 586         state->pid = state->request->pid;
 587
 588         state->cmd_name = "unknown request";
 589         state->recv_fn = NULL;
 590
 591         /* Process command */
 592
 593         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 594                 if (state->request->cmd == atable->cmd) {
 595                         break;
 596                 }
 597         }
 598
 599         if ((atable->send_req == NULL) && state->privileged) {
 600                 for (atable = async_priv_table; atable->send_req;
 601                      atable += 1) {
 602                         if (state->request->cmd == atable->cmd) {
 603                                 break;
 604                         }
 605                 }
 606         }
 607
 608         if (atable->send_req != NULL) {
 609                 struct tevent_req *req;
 610
 611                 state->cmd_name = atable->cmd_name;
 612                 state->recv_fn = atable->recv_req;
 613
 614                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 615                            (int)state->pid, state->cmd_name));
 616
 617                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 618                                        state, state->request);
 619                 if (req == NULL) {
 620                         DEBUG(0, ("process_request: atable->send failed for "
 621                                   "%s\n", atable->cmd_name));
 622                         request_error(state);
 623                         return;
 624                 }
 625                 tevent_req_set_callback(req, wb_request_done, state);
 626                 return;
 627         }
 628
 629         state->response = talloc_zero(state->mem_ctx,
 630                                       struct winbindd_response);
 631         if (state->response == NULL) {
 632                 DEBUG(10, ("talloc failed\n"));
 633                 remove_client(state);
 634                 return;
 635         }
 636         state->response->result = WINBINDD_PENDING;
 637         state->response->length = sizeof(struct winbindd_response);
 638
 639         for (table = dispatch_table; table->fn; table++) {
 640                 if (state->request->cmd == table->cmd) {
 641                         DEBUG(10,("process_request: request fn %s\n",
 642                                   table->winbindd_cmd_name ));
 643                         state->cmd_name = table->winbindd_cmd_name;
 644                         table->fn(state);
 645                         break;
 646                 }
 647         }
 648
 649         if (!table->fn) {
 650                 DEBUG(10,("process_request: unknown request fn number %d\n",
 651                           (int)state->request->cmd ));
 652                 request_error(state);
 653         }
 654 }
 655
 656 static void wb_request_done(struct tevent_req *req)
 657 {
 658         struct winbindd_cli_state *state = tevent_req_callback_data(
 659                 req, struct winbindd_cli_state);
 660         NTSTATUS status;
 661
 662         state->response = talloc_zero(state->mem_ctx,
 663                                       struct winbindd_response);
 664         if (state->response == NULL) {
 665                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 666                           (int)state->pid, state->cmd_name));
 667                 remove_client(state);
 668                 return;
 669         }
 670         state->response->result = WINBINDD_PENDING;
 671         state->response->length = sizeof(struct winbindd_response);
 672
 673         status = state->recv_fn(req, state->response);
 674         TALLOC_FREE(req);
 675
 676         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 677                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 678
 679         if (!NT_STATUS_IS_OK(status)) {
 680                 request_error(state);
 681                 return;
 682         }
 683         request_ok(state);
 684 }
 685
 686 /*
 687  * This is the main event loop of winbind requests. It goes through a
 688  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 689  *
 690  * An idle winbind client has a read request of 4 bytes outstanding,
 691  * finalizing function is request_len_recv, checking the length. request_recv
 692  * then processes the packet. The processing function then at some point has
 693  * to call request_finished which schedules sending the response.
 694  */
 695
 696 static void request_finished(struct winbindd_cli_state *state);
 697
 698 static void winbind_client_request_read(struct tevent_req *req);
 699 static void winbind_client_response_written(struct tevent_req *req);
 700
 701 static void request_finished(struct winbindd_cli_state *state)
 702 {
 703         struct tevent_req *req;
 704
 705         TALLOC_FREE(state->request);
 706
 707         req = wb_resp_write_send(state, winbind_event_context(),
 708                                  state->out_queue, state->sock,
 709                                  state->response);
 710         if (req == NULL) {
 711                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 712                           (int)state->pid, state->cmd_name));
 713                 remove_client(state);
 714                 return;
 715         }
 716         tevent_req_set_callback(req, winbind_client_response_written, state);
 717 }
 718
 719 static void winbind_client_response_written(struct tevent_req *req)
 720 {
 721         struct winbindd_cli_state *state = tevent_req_callback_data(
 722                 req, struct winbindd_cli_state);
 723         ssize_t ret;
 724         int err;
 725
 726         ret = wb_resp_write_recv(req, &err);
 727         TALLOC_FREE(req);
 728         if (ret == -1) {
 729                 close(state->sock);
 730                 state->sock = -1;
 731                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 732                           (int)state->pid, state->cmd_name, strerror(err)));
 733                 remove_client(state);
 734                 return;
 735         }
 736
 737         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 738                   "to client\n", (int)state->pid, state->cmd_name));
 739
 740         TALLOC_FREE(state->mem_ctx);
 741         state->response = NULL;
 742         state->cmd_name = "no request";
 743         state->recv_fn = NULL;
 744
 745         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 746                                WINBINDD_MAX_EXTRA_DATA);
 747         if (req == NULL) {
 748                 remove_client(state);
 749                 return;
 750         }
 751         tevent_req_set_callback(req, winbind_client_request_read, state);
 752 }
 753
 754 void request_error(struct winbindd_cli_state *state)
 755 {
 756         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 757         state->response->result = WINBINDD_ERROR;
 758         request_finished(state);
 759 }
 760
 761 void request_ok(struct winbindd_cli_state *state)
 762 {
 763         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 764         state->response->result = WINBINDD_OK;
 765         request_finished(state);
 766 }
 767
 768 /* Process a new connection by adding it to the client connection list */
 769
 770 static void new_connection(int listen_sock, bool privileged)
 771 {
 772         struct sockaddr_un sunaddr;
 773         struct winbindd_cli_state *state;
 774         struct tevent_req *req;
 775         socklen_t len;
 776         int sock;
 777
 778         /* Accept connection */
 779
 780         len = sizeof(sunaddr);
 781
 782         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 783
 784         if (sock == -1) {
 785                 if (errno != EINTR) {
 786                         DEBUG(0, ("Faild to accept socket - %s\n",
 787                                   strerror(errno)));
 788                 }
 789                 return;
 790         }
 791
 792         DEBUG(6,("accepted socket %d\n", sock));
 793
 794         /* Create new connection structure */
 795
 796         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 797                 close(sock);
 798                 return;
 799         }
 800
 801         state->sock = sock;
 802
 803         state->out_queue = tevent_queue_create(state, "winbind client reply");
 804         if (state->out_queue == NULL) {
 805                 close(sock);
 806                 TALLOC_FREE(state);
 807                 return;
 808         }
 809
 810         state->last_access = time(NULL);
 811
 812         state->privileged = privileged;
 813
 814         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 815                                WINBINDD_MAX_EXTRA_DATA);
 816         if (req == NULL) {
 817                 TALLOC_FREE(state);
 818                 close(sock);
 819                 return;
 820         }
 821         tevent_req_set_callback(req, winbind_client_request_read, state);
 822
 823         /* Add to connection list */
 824
 825         winbindd_add_client(state);
 826 }
 827
 828 static void winbind_client_request_read(struct tevent_req *req)
 829 {
 830         struct winbindd_cli_state *state = tevent_req_callback_data(
 831                 req, struct winbindd_cli_state);
 832         ssize_t ret;
 833         int err;
 834
 835         ret = wb_req_read_recv(req, state, &state->request, &err);
 836         TALLOC_FREE(req);
 837         if (ret == -1) {
 838                 if (err == EPIPE) {
 839                         DEBUG(6, ("closing socket %d, client exited\n",
 840                                   state->sock));
 841                 } else {
 842                         DEBUG(2, ("Could not read client request from fd %d: "
 843                                   "%s\n", state->sock, strerror(err)));
 844                 }
 845                 close(state->sock);
 846                 state->sock = -1;
 847                 remove_client(state);
 848                 return;
 849         }
 850         process_request(state);
 851 }
 852
 853 /* Remove a client connection from client connection list */
 854
 855 static void remove_client(struct winbindd_cli_state *state)
 856 {
 857         char c = 0;
 858         int nwritten;
 859
 860         /* It's a dead client - hold a funeral */
 861
 862         if (state == NULL) {
 863                 return;
 864         }
 865
 866         if (state->sock != -1) {
 867                 /* tell client, we are closing ... */
 868                 nwritten = write(state->sock, &c, sizeof(c));
 869                 if (nwritten == -1) {
 870                         DEBUG(2, ("final write to client failed: %s\n",
 871                                 strerror(errno)));
 872                 }
 873
 874                 /* Close socket */
 875
 876                 close(state->sock);
 877                 state->sock = -1;
 878         }
 879
 880         TALLOC_FREE(state->mem_ctx);
 881
 882         /* Remove from list and free */
 883
 884         winbindd_remove_client(state);
 885         TALLOC_FREE(state);
 886 }
 887
 888 /* Is a client idle? */
 889
 890 static bool client_is_idle(struct winbindd_cli_state *state) {
 891   return (state->response == NULL &&
 892           !state->pwent_state && !state->grent_state);
 893 }
 894
 895 /* Shutdown client connection which has been idle for the longest time */
 896
 897 static bool remove_idle_client(void)
 898 {
 899         struct winbindd_cli_state *state, *remove_state = NULL;
 900         time_t last_access = 0;
 901         int nidle = 0;
 902
 903         for (state = winbindd_client_list(); state; state = state->next) {
 904                 if (client_is_idle(state)) {
 905                         nidle++;
 906                         if (!last_access || state->last_access < last_access) {
 907                                 last_access = state->last_access;
 908                                 remove_state = state;
 909                         }
 910                 }
 911         }
 912
 913         if (remove_state) {
 914                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 915                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 916                 remove_client(remove_state);
 917                 return True;
 918         }
 919
 920         return False;
 921 }
 922
 923 struct winbindd_listen_state {
 924         bool privileged;
 925         int fd;
 926 };
 927
 928 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 929                                         struct tevent_fd *fde,
 930                                         uint16_t flags,
 931                                         void *private_data)
 932 {
 933         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 934                                           struct winbindd_listen_state);
 935
 936         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 937                 DEBUG(5,("winbindd: Exceeding %d client "
 938                          "connections, removing idle "
 939                          "connection.\n", lp_winbind_max_clients()));
 940                 if (!remove_idle_client()) {
 941                         DEBUG(0,("winbindd: Exceeding %d "
 942                                  "client connections, no idle "
 943                                  "connection found\n",
 944                                  lp_winbind_max_clients()));
 945                         break;
 946                 }
 947         }
 948         new_connection(s->fd, s->privileged);
 949 }
 950
 951 /*
 952  * Winbindd socket accessor functions
 953  */
 954
 955 const char *get_winbind_pipe_dir(void)
 956 {
 957         return lp_parm_const_string(-1, "winbindd", "socket dir", WINBINDD_SOCKET_DIR);
 958 }
 959
 960 char *get_winbind_priv_pipe_dir(void)
 961 {
 962         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 963 }
 964
 965 static bool winbindd_setup_listeners(void)
 966 {
 967         struct winbindd_listen_state *pub_state = NULL;
 968         struct winbindd_listen_state *priv_state = NULL;
 969         struct tevent_fd *fde;
 970
 971         pub_state = talloc(winbind_event_context(),
 972                            struct winbindd_listen_state);
 973         if (!pub_state) {
 974                 goto failed;
 975         }
 976
 977         pub_state->privileged = false;
 978         pub_state->fd = create_pipe_sock(
 979                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 980         if (pub_state->fd == -1) {
 981                 goto failed;
 982         }
 983
 984         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 985                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 986                             pub_state);
 987         if (fde == NULL) {
 988                 close(pub_state->fd);
 989                 goto failed;
 990         }
 991         tevent_fd_set_auto_close(fde);
 992
 993         priv_state = talloc(winbind_event_context(),
 994                             struct winbindd_listen_state);
 995         if (!priv_state) {
 996                 goto failed;
 997         }
 998
 999         priv_state->privileged = true;
1000         priv_state->fd = create_pipe_sock(
1001                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1002         if (priv_state->fd == -1) {
1003                 goto failed;
1004         }
1005
1006         fde = tevent_add_fd(winbind_event_context(), priv_state,
1007                             priv_state->fd, TEVENT_FD_READ,
1008                             winbindd_listen_fde_handler, priv_state);
1009         if (fde == NULL) {
1010                 close(priv_state->fd);
1011                 goto failed;
1012         }
1013         tevent_fd_set_auto_close(fde);
1014
1015         return true;
1016 failed:
1017         TALLOC_FREE(pub_state);
1018         TALLOC_FREE(priv_state);
1019         return false;
1020 }
1021
1022 bool winbindd_use_idmap_cache(void)
1023 {
1024         return !opt_nocache;
1025 }
1026
1027 bool winbindd_use_cache(void)
1028 {
1029         return !opt_nocache;
1030 }
1031
1032 void winbindd_register_handlers(void)
1033 {
1034         /* Setup signal handlers */
1035
1036         if (!winbindd_setup_sig_term_handler(true))
1037                 exit(1);
1038         if (!winbindd_setup_sig_hup_handler(NULL))
1039                 exit(1);
1040         if (!winbindd_setup_sig_chld_handler())
1041                 exit(1);
1042         if (!winbindd_setup_sig_usr2_handler())
1043                 exit(1);
1044
1045         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1046
1047         /*
1048          * Ensure all cache and idmap caches are consistent
1049          * and initialized before we startup.
1050          */
1051         if (!winbindd_cache_validate_and_initialize()) {
1052                 exit(1);
1053         }
1054
1055         /* get broadcast messages */
1056
1057         if (!serverid_register(procid_self(),
1058                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1059                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1060                 exit(1);
1061         }
1062
1063         /* React on 'smbcontrol winbindd reload-config' in the same way
1064            as to SIGHUP signal */
1065         messaging_register(winbind_messaging_context(), NULL,
1066                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1067         messaging_register(winbind_messaging_context(), NULL,
1068                            MSG_SHUTDOWN, msg_shutdown);
1069
1070         /* Handle online/offline messages. */
1071         messaging_register(winbind_messaging_context(), NULL,
1072                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1073         messaging_register(winbind_messaging_context(), NULL,
1074                            MSG_WINBIND_ONLINE, winbind_msg_online);
1075         messaging_register(winbind_messaging_context(), NULL,
1076                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1077
1078         messaging_register(winbind_messaging_context(), NULL,
1079                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1080
1081         messaging_register(winbind_messaging_context(), NULL,
1082                            MSG_WINBIND_VALIDATE_CACHE,
1083                            winbind_msg_validate_cache);
1084
1085         messaging_register(winbind_messaging_context(), NULL,
1086                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1087                            winbind_msg_dump_domain_list);
1088
1089         messaging_register(winbind_messaging_context(), NULL,
1090                            MSG_WINBIND_IP_DROPPED,
1091                            winbind_msg_ip_dropped_parent);
1092
1093         /* Register handler for MSG_DEBUG. */
1094         messaging_register(winbind_messaging_context(), NULL,
1095                            MSG_DEBUG,
1096                            winbind_msg_debug);
1097
1098         netsamlogon_cache_init(); /* Non-critical */
1099
1100         /* clear the cached list of trusted domains */
1101
1102         wcache_tdc_clear();
1103
1104         if (!init_domain_list()) {
1105                 DEBUG(0,("unable to initialize domain list\n"));
1106                 exit(1);
1107         }
1108
1109         init_idmap_child();
1110         init_locator_child();
1111
1112         smb_nscd_flush_user_cache();
1113         smb_nscd_flush_group_cache();
1114
1115         if (lp_allow_trusted_domains()) {
1116                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1117                               rescan_trusted_domains, NULL) == NULL) {
1118                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1119                         exit(1);
1120                 }
1121         }
1122
1123 }
1124
1125 struct winbindd_addrchanged_state {
1126         struct addrchange_context *ctx;
1127         struct tevent_context *ev;
1128         struct messaging_context *msg_ctx;
1129 };
1130
1131 static void winbindd_addr_changed(struct tevent_req *req);
1132
1133 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1134                                      struct tevent_context *ev,
1135                                      struct messaging_context *msg_ctx)
1136 {
1137         struct winbindd_addrchanged_state *state;
1138         struct tevent_req *req;
1139         NTSTATUS status;
1140
1141         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1142         if (state == NULL) {
1143                 DEBUG(10, ("talloc failed\n"));
1144                 return;
1145         }
1146         state->ev = ev;
1147         state->msg_ctx = msg_ctx;
1148
1149         status = addrchange_context_create(state, &state->ctx);
1150         if (!NT_STATUS_IS_OK(status)) {
1151                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1152                            nt_errstr(status)));
1153                 TALLOC_FREE(state);
1154                 return;
1155         }
1156         req = addrchange_send(state, ev, state->ctx);
1157         if (req == NULL) {
1158                 DEBUG(0, ("addrchange_send failed\n"));
1159                 TALLOC_FREE(state);
1160                 return;
1161         }
1162         tevent_req_set_callback(req, winbindd_addr_changed, state);
1163 }
1164
1165 static void winbindd_addr_changed(struct tevent_req *req)
1166 {
1167         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1168                 req, struct winbindd_addrchanged_state);
1169         enum addrchange_type type;
1170         struct sockaddr_storage addr;
1171         NTSTATUS status;
1172
1173         status = addrchange_recv(req, &type, &addr);
1174         TALLOC_FREE(req);
1175         if (!NT_STATUS_IS_OK(status)) {
1176                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1177                            nt_errstr(status)));
1178                 TALLOC_FREE(state);
1179                 return;
1180         }
1181         if (type == ADDRCHANGE_DEL) {
1182                 char addrstr[INET6_ADDRSTRLEN];
1183                 DATA_BLOB blob;
1184
1185                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1186
1187                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1188                           addrstr));
1189
1190                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1191
1192                 status = messaging_send(state->msg_ctx,
1193                                         messaging_server_id(state->msg_ctx),
1194                                         MSG_WINBIND_IP_DROPPED, &blob);
1195                 if (!NT_STATUS_IS_OK(status)) {
1196                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1197                                    nt_errstr(status)));
1198                 }
1199         }
1200         req = addrchange_send(state, state->ev, state->ctx);
1201         if (req == NULL) {
1202                 DEBUG(0, ("addrchange_send failed\n"));
1203                 TALLOC_FREE(state);
1204                 return;
1205         }
1206         tevent_req_set_callback(req, winbindd_addr_changed, state);
1207 }
1208
1209 /* Main function */
1210
1211 int main(int argc, char **argv, char **envp)
1212 {
1213         static bool is_daemon = False;
1214         static bool Fork = True;
1215         static bool log_stdout = False;
1216         static bool no_process_group = False;
1217         enum {
1218                 OPT_DAEMON = 1000,
1219                 OPT_FORK,
1220                 OPT_NO_PROCESS_GROUP,
1221                 OPT_LOG_STDOUT
1222         };
1223         struct poptOption long_options[] = {
1224                 POPT_AUTOHELP
1225                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1226                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1227                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1228                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1229                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1230                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1231                 POPT_COMMON_SAMBA
1232                 POPT_TABLEEND
1233         };
1234         poptContext pc;
1235         int opt;
1236         TALLOC_CTX *frame;
1237         NTSTATUS status;
1238
1239         /*
1240          * Do this before any other talloc operation
1241          */
1242         talloc_enable_null_tracking();
1243         frame = talloc_stackframe();
1244
1245         /* glibc (?) likes to print "User defined signal 1" and exit if a
1246            SIGUSR[12] is received before a handler is installed */
1247
1248         CatchSignal(SIGUSR1, SIG_IGN);
1249         CatchSignal(SIGUSR2, SIG_IGN);
1250
1251         fault_setup((void (*)(void *))fault_quit );
1252         dump_core_setup("winbindd");
1253
1254         load_case_tables();
1255
1256         /* Initialise for running in non-root mode */
1257
1258         sec_init();
1259
1260         set_remote_machine_name("winbindd", False);
1261
1262         /* Set environment variable so we don't recursively call ourselves.
1263            This may also be useful interactively. */
1264
1265         if ( !winbind_off() ) {
1266                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1267                 exit(1);
1268         }
1269
1270         /* Initialise samba/rpc client stuff */
1271
1272         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1273
1274         while ((opt = poptGetNextOpt(pc)) != -1) {
1275                 switch (opt) {
1276                         /* Don't become a daemon */
1277                 case OPT_DAEMON:
1278                         is_daemon = True;
1279                         break;
1280                 case 'i':
1281                         interactive = True;
1282                         log_stdout = True;
1283                         Fork = False;
1284                         break;
1285                 case OPT_FORK:
1286                         Fork = false;
1287                         break;
1288                 case OPT_NO_PROCESS_GROUP:
1289                         no_process_group = true;
1290                         break;
1291                 case OPT_LOG_STDOUT:
1292                         log_stdout = true;
1293                         break;
1294                 case 'n':
1295                         opt_nocache = true;
1296                         break;
1297                 default:
1298                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1299                                   poptBadOption(pc, 0), poptStrerror(opt));
1300                         poptPrintUsage(pc, stderr, 0);
1301                         exit(1);
1302                 }
1303         }
1304
1305         if (is_daemon && interactive) {
1306                 d_fprintf(stderr,"\nERROR: "
1307                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1308                 poptPrintUsage(pc, stderr, 0);
1309                 exit(1);
1310         }
1311
1312         if (log_stdout && Fork) {
1313                 d_fprintf(stderr, "\nERROR: "
1314                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1315                 poptPrintUsage(pc, stderr, 0);
1316                 exit(1);
1317         }
1318
1319         poptFreeContext(pc);
1320
1321         if (!override_logfile) {
1322                 char *lfile = NULL;
1323                 if (asprintf(&lfile,"%s/log.winbindd",
1324                                 get_dyn_LOGFILEBASE()) > 0) {
1325                         lp_set_logfile(lfile);
1326                         SAFE_FREE(lfile);
1327                 }
1328         }
1329         if (log_stdout) {
1330                 setup_logging("winbindd", DEBUG_STDOUT);
1331         } else {
1332                 setup_logging("winbindd", DEBUG_FILE);
1333         }
1334         reopen_logs();
1335
1336         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1337         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1338
1339         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1340                 DEBUG(0, ("error opening config file\n"));
1341                 exit(1);
1342         }
1343
1344         /* Initialise messaging system */
1345
1346         if (winbind_messaging_context() == NULL) {
1347                 exit(1);
1348         }
1349
1350         if (!reload_services_file(NULL)) {
1351                 DEBUG(0, ("error opening config file\n"));
1352                 exit(1);
1353         }
1354
1355         if (!directory_exist(lp_lockdir())) {
1356                 mkdir(lp_lockdir(), 0755);
1357         }
1358
1359         /* Setup names. */
1360
1361         if (!init_names())
1362                 exit(1);
1363
1364         load_interfaces();
1365
1366         if (!secrets_init()) {
1367
1368                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1369                 return False;
1370         }
1371
1372         /* Unblock all signals we are interested in as they may have been
1373            blocked by the parent process. */
1374
1375         BlockSignals(False, SIGINT);
1376         BlockSignals(False, SIGQUIT);
1377         BlockSignals(False, SIGTERM);
1378         BlockSignals(False, SIGUSR1);
1379         BlockSignals(False, SIGUSR2);
1380         BlockSignals(False, SIGHUP);
1381         BlockSignals(False, SIGCHLD);
1382
1383         if (!interactive)
1384                 become_daemon(Fork, no_process_group, log_stdout);
1385
1386         pidfile_create("winbindd");
1387
1388 #if HAVE_SETPGID
1389         /*
1390          * If we're interactive we want to set our own process group for
1391          * signal management.
1392          */
1393         if (interactive && !no_process_group)
1394                 setpgid( (pid_t)0, (pid_t)0);
1395 #endif
1396
1397         TimeInit();
1398
1399         /* Don't use winbindd_reinit_after_fork here as
1400          * we're just starting up and haven't created any
1401          * winbindd-specific resources we must free yet. JRA.
1402          */
1403
1404         status = reinit_after_fork(winbind_messaging_context(),
1405                                    winbind_event_context(),
1406                                    procid_self(), false);
1407         if (!NT_STATUS_IS_OK(status)) {
1408                 DEBUG(0,("reinit_after_fork() failed\n"));
1409                 exit(1);
1410         }
1411
1412         winbindd_register_handlers();
1413
1414         status = init_system_info();
1415         if (!NT_STATUS_IS_OK(status)) {
1416                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1417                           nt_errstr(status)));
1418                 exit(1);
1419         }
1420
1421         rpc_lsarpc_init(NULL);
1422         rpc_samr_init(NULL);
1423
1424         winbindd_init_addrchange(NULL, winbind_event_context(),
1425                                  winbind_messaging_context());
1426
1427         /* setup listen sockets */
1428
1429         if (!winbindd_setup_listeners()) {
1430                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1431                 exit(1);
1432         }
1433
1434         TALLOC_FREE(frame);
1435         /* Loop waiting for requests */
1436         while (1) {
1437                 frame = talloc_stackframe();
1438
1439                 if (tevent_loop_once(winbind_event_context()) == -1) {
1440                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1441                                   strerror(errno)));
1442                         return 1;
1443                 }
1444
1445                 TALLOC_FREE(frame);
1446         }
1447
1448         return 0;
1449 }