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                 char *fname = lp_configfile();
  69
  70                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  71                         set_dyn_CONFIGFILE(fname);
  72                 }
  73                 TALLOC_FREE(fname);
  74         }
  75
  76         /* if this is a child, restore the logfile to the special
  77            name - <domain>, idmap, etc. */
  78         if (lfile && *lfile) {
  79                 lp_set_logfile(lfile);
  80         }
  81
  82         reopen_logs();
  83         ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
  84
  85         reopen_logs();
  86         load_interfaces();
  87
  88         return(ret);
  89 }
  90
  91
  92 /**************************************************************************** **
  93  Handle a fault..
  94  **************************************************************************** */
  95
  96 static void fault_quit(void)
  97 {
  98         dump_core();
  99 }
 100
 101 static void winbindd_status(void)
 102 {
 103         struct winbindd_cli_state *tmp;
 104
 105         DEBUG(0, ("winbindd status:\n"));
 106
 107         /* Print client state information */
 108
 109         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 110
 111         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 112                 DEBUG(2, ("\tclient list:\n"));
 113                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 114                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 115                                      (unsigned long)tmp->pid, tmp->sock,
 116                                      client_is_idle(tmp) ? "idle" : "active"));
 117                 }
 118         }
 119 }
 120
 121 /* Flush client cache */
 122
 123 static void flush_caches(void)
 124 {
 125         /* We need to invalidate cached user list entries on a SIGHUP
 126            otherwise cached access denied errors due to restrict anonymous
 127            hang around until the sequence number changes. */
 128
 129         if (!wcache_invalidate_cache()) {
 130                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 131                 if (!winbindd_cache_validate_and_initialize()) {
 132                         exit(1);
 133                 }
 134         }
 135 }
 136
 137 static void flush_caches_noinit(void)
 138 {
 139         /*
 140          * We need to invalidate cached user list entries on a SIGHUP
 141          * otherwise cached access denied errors due to restrict anonymous
 142          * hang around until the sequence number changes.
 143          * NB
 144          * Skip uninitialized domains when flush cache.
 145          * If domain is not initialized, it means it is never
 146          * used or never become online. look, wcache_invalidate_cache()
 147          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 148          * for unused domains and large traffic for primay domain's DC if there
 149          * are many domains..
 150          */
 151
 152         if (!wcache_invalidate_cache_noinit()) {
 153                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 154                 if (!winbindd_cache_validate_and_initialize()) {
 155                         exit(1);
 156                 }
 157         }
 158 }
 159
 160 /* Handle the signal by unlinking socket and exiting */
 161
 162 static void terminate(bool is_parent)
 163 {
 164         if (is_parent) {
 165                 /* When parent goes away we should
 166                  * remove the socket file. Not so
 167                  * when children terminate.
 168                  */
 169                 char *path = NULL;
 170
 171                 if (asprintf(&path, "%s/%s",
 172                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 173                         unlink(path);
 174                         SAFE_FREE(path);
 175                 }
 176         }
 177
 178         idmap_close();
 179
 180         trustdom_cache_shutdown();
 181
 182         gencache_stabilize();
 183
 184 #if 0
 185         if (interactive) {
 186                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 187                 char *description = talloc_describe_all(mem_ctx);
 188
 189                 DEBUG(3, ("tallocs left:\n%s\n", description));
 190                 talloc_destroy(mem_ctx);
 191         }
 192 #endif
 193
 194         if (is_parent) {
 195                 serverid_deregister(procid_self());
 196                 pidfile_unlink();
 197         }
 198
 199         exit(0);
 200 }
 201
 202 static void winbindd_sig_term_handler(struct tevent_context *ev,
 203                                       struct tevent_signal *se,
 204                                       int signum,
 205                                       int count,
 206                                       void *siginfo,
 207                                       void *private_data)
 208 {
 209         bool *is_parent = talloc_get_type_abort(private_data, bool);
 210
 211         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 212                  signum, (int)*is_parent));
 213         terminate(*is_parent);
 214 }
 215
 216 bool winbindd_setup_sig_term_handler(bool parent)
 217 {
 218         struct tevent_signal *se;
 219         bool *is_parent;
 220
 221         is_parent = talloc(winbind_event_context(), bool);
 222         if (!is_parent) {
 223                 return false;
 224         }
 225
 226         *is_parent = parent;
 227
 228         se = tevent_add_signal(winbind_event_context(),
 229                                is_parent,
 230                                SIGTERM, 0,
 231                                winbindd_sig_term_handler,
 232                                is_parent);
 233         if (!se) {
 234                 DEBUG(0,("failed to setup SIGTERM handler"));
 235                 talloc_free(is_parent);
 236                 return false;
 237         }
 238
 239         se = tevent_add_signal(winbind_event_context(),
 240                                is_parent,
 241                                SIGINT, 0,
 242                                winbindd_sig_term_handler,
 243                                is_parent);
 244         if (!se) {
 245                 DEBUG(0,("failed to setup SIGINT handler"));
 246                 talloc_free(is_parent);
 247                 return false;
 248         }
 249
 250         se = tevent_add_signal(winbind_event_context(),
 251                                is_parent,
 252                                SIGQUIT, 0,
 253                                winbindd_sig_term_handler,
 254                                is_parent);
 255         if (!se) {
 256                 DEBUG(0,("failed to setup SIGINT handler"));
 257                 talloc_free(is_parent);
 258                 return false;
 259         }
 260
 261         return true;
 262 }
 263
 264 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 265                                      struct tevent_signal *se,
 266                                      int signum,
 267                                      int count,
 268                                      void *siginfo,
 269                                      void *private_data)
 270 {
 271         const char *file = (const char *)private_data;
 272
 273         DEBUG(1,("Reloading services after SIGHUP\n"));
 274         flush_caches_noinit();
 275         reload_services_file(file);
 276 }
 277
 278 bool winbindd_setup_sig_hup_handler(const char *lfile)
 279 {
 280         struct tevent_signal *se;
 281         char *file = NULL;
 282
 283         if (lfile) {
 284                 file = talloc_strdup(winbind_event_context(),
 285                                      lfile);
 286                 if (!file) {
 287                         return false;
 288                 }
 289         }
 290
 291         se = tevent_add_signal(winbind_event_context(),
 292                                winbind_event_context(),
 293                                SIGHUP, 0,
 294                                winbindd_sig_hup_handler,
 295                                file);
 296         if (!se) {
 297                 return false;
 298         }
 299
 300         return true;
 301 }
 302
 303 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 304                                       struct tevent_signal *se,
 305                                       int signum,
 306                                       int count,
 307                                       void *siginfo,
 308                                       void *private_data)
 309 {
 310         pid_t pid;
 311
 312         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 313                 winbind_child_died(pid);
 314         }
 315 }
 316
 317 static bool winbindd_setup_sig_chld_handler(void)
 318 {
 319         struct tevent_signal *se;
 320
 321         se = tevent_add_signal(winbind_event_context(),
 322                                winbind_event_context(),
 323                                SIGCHLD, 0,
 324                                winbindd_sig_chld_handler,
 325                                NULL);
 326         if (!se) {
 327                 return false;
 328         }
 329
 330         return true;
 331 }
 332
 333 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 334                                       struct tevent_signal *se,
 335                                       int signum,
 336                                       int count,
 337                                       void *siginfo,
 338                                       void *private_data)
 339 {
 340         winbindd_status();
 341 }
 342
 343 static bool winbindd_setup_sig_usr2_handler(void)
 344 {
 345         struct tevent_signal *se;
 346
 347         se = tevent_add_signal(winbind_event_context(),
 348                                winbind_event_context(),
 349                                SIGUSR2, 0,
 350                                winbindd_sig_usr2_handler,
 351                                NULL);
 352         if (!se) {
 353                 return false;
 354         }
 355
 356         return true;
 357 }
 358
 359 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 360 static void msg_reload_services(struct messaging_context *msg,
 361                                 void *private_data,
 362                                 uint32_t msg_type,
 363                                 struct server_id server_id,
 364                                 DATA_BLOB *data)
 365 {
 366         /* Flush various caches */
 367         flush_caches();
 368         reload_services_file((const char *) private_data);
 369 }
 370
 371 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 372 static void msg_shutdown(struct messaging_context *msg,
 373                          void *private_data,
 374                          uint32_t msg_type,
 375                          struct server_id server_id,
 376                          DATA_BLOB *data)
 377 {
 378         /* only the parent waits for this message */
 379         DEBUG(0,("Got shutdown message\n"));
 380         terminate(true);
 381 }
 382
 383
 384 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 385                                        void *private_data,
 386                                        uint32_t msg_type,
 387                                        struct server_id server_id,
 388                                        DATA_BLOB *data)
 389 {
 390         uint8 ret;
 391         pid_t child_pid;
 392         NTSTATUS status;
 393
 394         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 395                    "message.\n"));
 396
 397         /*
 398          * call the validation code from a child:
 399          * so we don't block the main winbindd and the validation
 400          * code can safely use fork/waitpid...
 401          */
 402         child_pid = sys_fork();
 403
 404         if (child_pid == -1) {
 405                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 406                           strerror(errno)));
 407                 return;
 408         }
 409
 410         if (child_pid != 0) {
 411                 /* parent */
 412                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 413                           "pid %d.\n", (int)child_pid));
 414                 return;
 415         }
 416
 417         /* child */
 418
 419         status = winbindd_reinit_after_fork(NULL, NULL);
 420         if (!NT_STATUS_IS_OK(status)) {
 421                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 422                           nt_errstr(status)));
 423                 _exit(0);
 424         }
 425
 426         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 427         CatchSignal(SIGCHLD, SIG_DFL);
 428
 429         ret = (uint8)winbindd_validate_cache_nobackup();
 430         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 431         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 432                            (size_t)1);
 433         _exit(0);
 434 }
 435
 436 static struct winbindd_dispatch_table {
 437         enum winbindd_cmd cmd;
 438         void (*fn)(struct winbindd_cli_state *state);
 439         const char *winbindd_cmd_name;
 440 } dispatch_table[] = {
 441
 442         /* Enumeration functions */
 443
 444         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 445           "LIST_TRUSTDOM" },
 446
 447         /* Miscellaneous */
 448
 449         { WINBINDD_INFO, winbindd_info, "INFO" },
 450         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 451           "INTERFACE_VERSION" },
 452         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 453         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 454         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 455         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 456         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 457           "WINBINDD_PRIV_PIPE_DIR" },
 458
 459         /* Credential cache access */
 460         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 461         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 462
 463         /* WINS functions */
 464
 465         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 466         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 467
 468         /* End of list */
 469
 470         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 471 };
 472
 473 struct winbindd_async_dispatch_table {
 474         enum winbindd_cmd cmd;
 475         const char *cmd_name;
 476         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 477                                        struct tevent_context *ev,
 478                                        struct winbindd_cli_state *cli,
 479                                        struct winbindd_request *request);
 480         NTSTATUS (*recv_req)(struct tevent_req *req,
 481                              struct winbindd_response *presp);
 482 };
 483
 484 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 485         { WINBINDD_PING, "PING",
 486           wb_ping_send, wb_ping_recv },
 487         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 488           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 489         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 490           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 491         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 492           winbindd_lookupname_send, winbindd_lookupname_recv },
 493         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 494           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 495         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 496           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 497         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 498           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 499         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 500           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 501         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 502           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 503         { WINBINDD_GETPWSID, "GETPWSID",
 504           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 505         { WINBINDD_GETPWNAM, "GETPWNAM",
 506           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 507         { WINBINDD_GETPWUID, "GETPWUID",
 508           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 509         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 510           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 511         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 512           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 513         { WINBINDD_GETGROUPS, "GETGROUPS",
 514           winbindd_getgroups_send, winbindd_getgroups_recv },
 515         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 516           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 517         { WINBINDD_GETGRGID, "GETGRGID",
 518           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 519         { WINBINDD_GETGRNAM, "GETGRNAM",
 520           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 521         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 522           winbindd_getusersids_send, winbindd_getusersids_recv },
 523         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 524           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 525         { WINBINDD_SETPWENT, "SETPWENT",
 526           winbindd_setpwent_send, winbindd_setpwent_recv },
 527         { WINBINDD_GETPWENT, "GETPWENT",
 528           winbindd_getpwent_send, winbindd_getpwent_recv },
 529         { WINBINDD_ENDPWENT, "ENDPWENT",
 530           winbindd_endpwent_send, winbindd_endpwent_recv },
 531         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 532           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 533         { WINBINDD_GETDCNAME, "GETDCNAME",
 534           winbindd_getdcname_send, winbindd_getdcname_recv },
 535         { WINBINDD_SETGRENT, "SETGRENT",
 536           winbindd_setgrent_send, winbindd_setgrent_recv },
 537         { WINBINDD_GETGRENT, "GETGRENT",
 538           winbindd_getgrent_send, winbindd_getgrent_recv },
 539         { WINBINDD_ENDGRENT, "ENDGRENT",
 540           winbindd_endgrent_send, winbindd_endgrent_recv },
 541         { WINBINDD_LIST_USERS, "LIST_USERS",
 542           winbindd_list_users_send, winbindd_list_users_recv },
 543         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 544           winbindd_list_groups_send, winbindd_list_groups_recv },
 545         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 546           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 547         { WINBINDD_PING_DC, "PING_DC",
 548           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 549         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 550           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 551         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 552           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 553         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 554           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 555         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 556           winbindd_pam_chng_pswd_auth_crap_send,
 557           winbindd_pam_chng_pswd_auth_crap_recv },
 558
 559         { 0, NULL, NULL, NULL }
 560 };
 561
 562 static struct winbindd_async_dispatch_table async_priv_table[] = {
 563         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 564           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 565         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 566           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 567         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 568           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 569         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 570           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 571
 572         { 0, NULL, NULL, NULL }
 573 };
 574
 575 static void wb_request_done(struct tevent_req *req);
 576
 577 static void process_request(struct winbindd_cli_state *state)
 578 {
 579         struct winbindd_dispatch_table *table = dispatch_table;
 580         struct winbindd_async_dispatch_table *atable;
 581
 582         state->mem_ctx = talloc_named(state, 0, "winbind request");
 583         if (state->mem_ctx == NULL)
 584                 return;
 585
 586         /* Remember who asked us. */
 587         state->pid = state->request->pid;
 588
 589         state->cmd_name = "unknown request";
 590         state->recv_fn = NULL;
 591         state->last_access = time(NULL);
 592
 593         /* Process command */
 594
 595         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 596                 if (state->request->cmd == atable->cmd) {
 597                         break;
 598                 }
 599         }
 600
 601         if ((atable->send_req == NULL) && state->privileged) {
 602                 for (atable = async_priv_table; atable->send_req;
 603                      atable += 1) {
 604                         if (state->request->cmd == atable->cmd) {
 605                                 break;
 606                         }
 607                 }
 608         }
 609
 610         if (atable->send_req != NULL) {
 611                 struct tevent_req *req;
 612
 613                 state->cmd_name = atable->cmd_name;
 614                 state->recv_fn = atable->recv_req;
 615
 616                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 617                            (int)state->pid, state->cmd_name));
 618
 619                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 620                                        state, state->request);
 621                 if (req == NULL) {
 622                         DEBUG(0, ("process_request: atable->send failed for "
 623                                   "%s\n", atable->cmd_name));
 624                         request_error(state);
 625                         return;
 626                 }
 627                 tevent_req_set_callback(req, wb_request_done, state);
 628                 return;
 629         }
 630
 631         state->response = talloc_zero(state->mem_ctx,
 632                                       struct winbindd_response);
 633         if (state->response == NULL) {
 634                 DEBUG(10, ("talloc failed\n"));
 635                 remove_client(state);
 636                 return;
 637         }
 638         state->response->result = WINBINDD_PENDING;
 639         state->response->length = sizeof(struct winbindd_response);
 640
 641         for (table = dispatch_table; table->fn; table++) {
 642                 if (state->request->cmd == table->cmd) {
 643                         DEBUG(10,("process_request: request fn %s\n",
 644                                   table->winbindd_cmd_name ));
 645                         state->cmd_name = table->winbindd_cmd_name;
 646                         table->fn(state);
 647                         break;
 648                 }
 649         }
 650
 651         if (!table->fn) {
 652                 DEBUG(10,("process_request: unknown request fn number %d\n",
 653                           (int)state->request->cmd ));
 654                 request_error(state);
 655         }
 656 }
 657
 658 static void wb_request_done(struct tevent_req *req)
 659 {
 660         struct winbindd_cli_state *state = tevent_req_callback_data(
 661                 req, struct winbindd_cli_state);
 662         NTSTATUS status;
 663
 664         state->response = talloc_zero(state->mem_ctx,
 665                                       struct winbindd_response);
 666         if (state->response == NULL) {
 667                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 668                           (int)state->pid, state->cmd_name));
 669                 remove_client(state);
 670                 return;
 671         }
 672         state->response->result = WINBINDD_PENDING;
 673         state->response->length = sizeof(struct winbindd_response);
 674
 675         status = state->recv_fn(req, state->response);
 676         TALLOC_FREE(req);
 677
 678         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 679                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 680
 681         if (!NT_STATUS_IS_OK(status)) {
 682                 request_error(state);
 683                 return;
 684         }
 685         request_ok(state);
 686 }
 687
 688 /*
 689  * This is the main event loop of winbind requests. It goes through a
 690  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 691  *
 692  * An idle winbind client has a read request of 4 bytes outstanding,
 693  * finalizing function is request_len_recv, checking the length. request_recv
 694  * then processes the packet. The processing function then at some point has
 695  * to call request_finished which schedules sending the response.
 696  */
 697
 698 static void request_finished(struct winbindd_cli_state *state);
 699
 700 static void winbind_client_request_read(struct tevent_req *req);
 701 static void winbind_client_response_written(struct tevent_req *req);
 702
 703 static void request_finished(struct winbindd_cli_state *state)
 704 {
 705         struct tevent_req *req;
 706
 707         TALLOC_FREE(state->request);
 708
 709         req = wb_resp_write_send(state, winbind_event_context(),
 710                                  state->out_queue, state->sock,
 711                                  state->response);
 712         if (req == NULL) {
 713                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 714                           (int)state->pid, state->cmd_name));
 715                 remove_client(state);
 716                 return;
 717         }
 718         tevent_req_set_callback(req, winbind_client_response_written, state);
 719 }
 720
 721 static void winbind_client_response_written(struct tevent_req *req)
 722 {
 723         struct winbindd_cli_state *state = tevent_req_callback_data(
 724                 req, struct winbindd_cli_state);
 725         ssize_t ret;
 726         int err;
 727
 728         ret = wb_resp_write_recv(req, &err);
 729         TALLOC_FREE(req);
 730         if (ret == -1) {
 731                 close(state->sock);
 732                 state->sock = -1;
 733                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 734                           (int)state->pid, state->cmd_name, strerror(err)));
 735                 remove_client(state);
 736                 return;
 737         }
 738
 739         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 740                   "to client\n", (int)state->pid, state->cmd_name));
 741
 742         TALLOC_FREE(state->mem_ctx);
 743         state->response = NULL;
 744         state->cmd_name = "no request";
 745         state->recv_fn = NULL;
 746
 747         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 748                                WINBINDD_MAX_EXTRA_DATA);
 749         if (req == NULL) {
 750                 remove_client(state);
 751                 return;
 752         }
 753         tevent_req_set_callback(req, winbind_client_request_read, state);
 754 }
 755
 756 void request_error(struct winbindd_cli_state *state)
 757 {
 758         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 759         state->response->result = WINBINDD_ERROR;
 760         request_finished(state);
 761 }
 762
 763 void request_ok(struct winbindd_cli_state *state)
 764 {
 765         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 766         state->response->result = WINBINDD_OK;
 767         request_finished(state);
 768 }
 769
 770 /* Process a new connection by adding it to the client connection list */
 771
 772 static void new_connection(int listen_sock, bool privileged)
 773 {
 774         struct sockaddr_un sunaddr;
 775         struct winbindd_cli_state *state;
 776         struct tevent_req *req;
 777         socklen_t len;
 778         int sock;
 779
 780         /* Accept connection */
 781
 782         len = sizeof(sunaddr);
 783
 784         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 785
 786         if (sock == -1) {
 787                 if (errno != EINTR) {
 788                         DEBUG(0, ("Faild to accept socket - %s\n",
 789                                   strerror(errno)));
 790                 }
 791                 return;
 792         }
 793
 794         DEBUG(6,("accepted socket %d\n", sock));
 795
 796         /* Create new connection structure */
 797
 798         if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
 799                 close(sock);
 800                 return;
 801         }
 802
 803         state->sock = sock;
 804
 805         state->out_queue = tevent_queue_create(state, "winbind client reply");
 806         if (state->out_queue == NULL) {
 807                 close(sock);
 808                 TALLOC_FREE(state);
 809                 return;
 810         }
 811
 812         state->last_access = time(NULL);
 813
 814         state->privileged = privileged;
 815
 816         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 817                                WINBINDD_MAX_EXTRA_DATA);
 818         if (req == NULL) {
 819                 TALLOC_FREE(state);
 820                 close(sock);
 821                 return;
 822         }
 823         tevent_req_set_callback(req, winbind_client_request_read, state);
 824
 825         /* Add to connection list */
 826
 827         winbindd_add_client(state);
 828 }
 829
 830 static void winbind_client_request_read(struct tevent_req *req)
 831 {
 832         struct winbindd_cli_state *state = tevent_req_callback_data(
 833                 req, struct winbindd_cli_state);
 834         ssize_t ret;
 835         int err;
 836
 837         ret = wb_req_read_recv(req, state, &state->request, &err);
 838         TALLOC_FREE(req);
 839         if (ret == -1) {
 840                 if (err == EPIPE) {
 841                         DEBUG(6, ("closing socket %d, client exited\n",
 842                                   state->sock));
 843                 } else {
 844                         DEBUG(2, ("Could not read client request from fd %d: "
 845                                   "%s\n", state->sock, strerror(err)));
 846                 }
 847                 close(state->sock);
 848                 state->sock = -1;
 849                 remove_client(state);
 850                 return;
 851         }
 852         process_request(state);
 853 }
 854
 855 /* Remove a client connection from client connection list */
 856
 857 static void remove_client(struct winbindd_cli_state *state)
 858 {
 859         char c = 0;
 860         int nwritten;
 861
 862         /* It's a dead client - hold a funeral */
 863
 864         if (state == NULL) {
 865                 return;
 866         }
 867
 868         if (state->sock != -1) {
 869                 /* tell client, we are closing ... */
 870                 nwritten = write(state->sock, &c, sizeof(c));
 871                 if (nwritten == -1) {
 872                         DEBUG(2, ("final write to client failed: %s\n",
 873                                 strerror(errno)));
 874                 }
 875
 876                 /* Close socket */
 877
 878                 close(state->sock);
 879                 state->sock = -1;
 880         }
 881
 882         TALLOC_FREE(state->mem_ctx);
 883
 884         /* Remove from list and free */
 885
 886         winbindd_remove_client(state);
 887         TALLOC_FREE(state);
 888 }
 889
 890 /* Is a client idle? */
 891
 892 static bool client_is_idle(struct winbindd_cli_state *state) {
 893   return (state->request == NULL &&
 894           state->response == NULL &&
 895           !state->pwent_state && !state->grent_state);
 896 }
 897
 898 /* Shutdown client connection which has been idle for the longest time */
 899
 900 static bool remove_idle_client(void)
 901 {
 902         struct winbindd_cli_state *state, *remove_state = NULL;
 903         time_t last_access = 0;
 904         int nidle = 0;
 905
 906         for (state = winbindd_client_list(); state; state = state->next) {
 907                 if (client_is_idle(state)) {
 908                         nidle++;
 909                         if (!last_access || state->last_access < last_access) {
 910                                 last_access = state->last_access;
 911                                 remove_state = state;
 912                         }
 913                 }
 914         }
 915
 916         if (remove_state) {
 917                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 918                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 919                 remove_client(remove_state);
 920                 return True;
 921         }
 922
 923         return False;
 924 }
 925
 926 struct winbindd_listen_state {
 927         bool privileged;
 928         int fd;
 929 };
 930
 931 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 932                                         struct tevent_fd *fde,
 933                                         uint16_t flags,
 934                                         void *private_data)
 935 {
 936         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 937                                           struct winbindd_listen_state);
 938
 939         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 940                 DEBUG(5,("winbindd: Exceeding %d client "
 941                          "connections, removing idle "
 942                          "connection.\n", lp_winbind_max_clients()));
 943                 if (!remove_idle_client()) {
 944                         DEBUG(0,("winbindd: Exceeding %d "
 945                                  "client connections, no idle "
 946                                  "connection found\n",
 947                                  lp_winbind_max_clients()));
 948                         break;
 949                 }
 950         }
 951         new_connection(s->fd, s->privileged);
 952 }
 953
 954 /*
 955  * Winbindd socket accessor functions
 956  */
 957
 958 const char *get_winbind_pipe_dir(void)
 959 {
 960         return lp_parm_const_string(-1, "winbindd", "socket dir", WINBINDD_SOCKET_DIR);
 961 }
 962
 963 char *get_winbind_priv_pipe_dir(void)
 964 {
 965         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 966 }
 967
 968 static bool winbindd_setup_listeners(void)
 969 {
 970         struct winbindd_listen_state *pub_state = NULL;
 971         struct winbindd_listen_state *priv_state = NULL;
 972         struct tevent_fd *fde;
 973
 974         pub_state = talloc(winbind_event_context(),
 975                            struct winbindd_listen_state);
 976         if (!pub_state) {
 977                 goto failed;
 978         }
 979
 980         pub_state->privileged = false;
 981         pub_state->fd = create_pipe_sock(
 982                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
 983         if (pub_state->fd == -1) {
 984                 goto failed;
 985         }
 986
 987         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
 988                             TEVENT_FD_READ, winbindd_listen_fde_handler,
 989                             pub_state);
 990         if (fde == NULL) {
 991                 close(pub_state->fd);
 992                 goto failed;
 993         }
 994         tevent_fd_set_auto_close(fde);
 995
 996         priv_state = talloc(winbind_event_context(),
 997                             struct winbindd_listen_state);
 998         if (!priv_state) {
 999                 goto failed;
1000         }
1001
1002         priv_state->privileged = true;
1003         priv_state->fd = create_pipe_sock(
1004                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1005         if (priv_state->fd == -1) {
1006                 goto failed;
1007         }
1008
1009         fde = tevent_add_fd(winbind_event_context(), priv_state,
1010                             priv_state->fd, TEVENT_FD_READ,
1011                             winbindd_listen_fde_handler, priv_state);
1012         if (fde == NULL) {
1013                 close(priv_state->fd);
1014                 goto failed;
1015         }
1016         tevent_fd_set_auto_close(fde);
1017
1018         return true;
1019 failed:
1020         TALLOC_FREE(pub_state);
1021         TALLOC_FREE(priv_state);
1022         return false;
1023 }
1024
1025 bool winbindd_use_idmap_cache(void)
1026 {
1027         return !opt_nocache;
1028 }
1029
1030 bool winbindd_use_cache(void)
1031 {
1032         return !opt_nocache;
1033 }
1034
1035 void winbindd_register_handlers(void)
1036 {
1037         /* Setup signal handlers */
1038
1039         if (!winbindd_setup_sig_term_handler(true))
1040                 exit(1);
1041         if (!winbindd_setup_sig_hup_handler(NULL))
1042                 exit(1);
1043         if (!winbindd_setup_sig_chld_handler())
1044                 exit(1);
1045         if (!winbindd_setup_sig_usr2_handler())
1046                 exit(1);
1047
1048         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1049
1050         /*
1051          * Ensure all cache and idmap caches are consistent
1052          * and initialized before we startup.
1053          */
1054         if (!winbindd_cache_validate_and_initialize()) {
1055                 exit(1);
1056         }
1057
1058         /* get broadcast messages */
1059
1060         if (!serverid_register(procid_self(),
1061                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1062                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1063                 exit(1);
1064         }
1065
1066         /* React on 'smbcontrol winbindd reload-config' in the same way
1067            as to SIGHUP signal */
1068         messaging_register(winbind_messaging_context(), NULL,
1069                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1070         messaging_register(winbind_messaging_context(), NULL,
1071                            MSG_SHUTDOWN, msg_shutdown);
1072
1073         /* Handle online/offline messages. */
1074         messaging_register(winbind_messaging_context(), NULL,
1075                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1076         messaging_register(winbind_messaging_context(), NULL,
1077                            MSG_WINBIND_ONLINE, winbind_msg_online);
1078         messaging_register(winbind_messaging_context(), NULL,
1079                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1080
1081         messaging_register(winbind_messaging_context(), NULL,
1082                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1083
1084         messaging_register(winbind_messaging_context(), NULL,
1085                            MSG_WINBIND_VALIDATE_CACHE,
1086                            winbind_msg_validate_cache);
1087
1088         messaging_register(winbind_messaging_context(), NULL,
1089                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1090                            winbind_msg_dump_domain_list);
1091
1092         messaging_register(winbind_messaging_context(), NULL,
1093                            MSG_WINBIND_IP_DROPPED,
1094                            winbind_msg_ip_dropped_parent);
1095
1096         /* Register handler for MSG_DEBUG. */
1097         messaging_register(winbind_messaging_context(), NULL,
1098                            MSG_DEBUG,
1099                            winbind_msg_debug);
1100
1101         netsamlogon_cache_init(); /* Non-critical */
1102
1103         /* clear the cached list of trusted domains */
1104
1105         wcache_tdc_clear();
1106
1107         if (!init_domain_list()) {
1108                 DEBUG(0,("unable to initialize domain list\n"));
1109                 exit(1);
1110         }
1111
1112         init_idmap_child();
1113         init_locator_child();
1114
1115         smb_nscd_flush_user_cache();
1116         smb_nscd_flush_group_cache();
1117
1118         if (lp_allow_trusted_domains()) {
1119                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1120                               rescan_trusted_domains, NULL) == NULL) {
1121                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1122                         exit(1);
1123                 }
1124         }
1125
1126 }
1127
1128 struct winbindd_addrchanged_state {
1129         struct addrchange_context *ctx;
1130         struct tevent_context *ev;
1131         struct messaging_context *msg_ctx;
1132 };
1133
1134 static void winbindd_addr_changed(struct tevent_req *req);
1135
1136 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1137                                      struct tevent_context *ev,
1138                                      struct messaging_context *msg_ctx)
1139 {
1140         struct winbindd_addrchanged_state *state;
1141         struct tevent_req *req;
1142         NTSTATUS status;
1143
1144         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1145         if (state == NULL) {
1146                 DEBUG(10, ("talloc failed\n"));
1147                 return;
1148         }
1149         state->ev = ev;
1150         state->msg_ctx = msg_ctx;
1151
1152         status = addrchange_context_create(state, &state->ctx);
1153         if (!NT_STATUS_IS_OK(status)) {
1154                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1155                            nt_errstr(status)));
1156                 TALLOC_FREE(state);
1157                 return;
1158         }
1159         req = addrchange_send(state, ev, state->ctx);
1160         if (req == NULL) {
1161                 DEBUG(0, ("addrchange_send failed\n"));
1162                 TALLOC_FREE(state);
1163                 return;
1164         }
1165         tevent_req_set_callback(req, winbindd_addr_changed, state);
1166 }
1167
1168 static void winbindd_addr_changed(struct tevent_req *req)
1169 {
1170         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1171                 req, struct winbindd_addrchanged_state);
1172         enum addrchange_type type;
1173         struct sockaddr_storage addr;
1174         NTSTATUS status;
1175
1176         status = addrchange_recv(req, &type, &addr);
1177         TALLOC_FREE(req);
1178         if (!NT_STATUS_IS_OK(status)) {
1179                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1180                            nt_errstr(status)));
1181                 TALLOC_FREE(state);
1182                 return;
1183         }
1184         if (type == ADDRCHANGE_DEL) {
1185                 char addrstr[INET6_ADDRSTRLEN];
1186                 DATA_BLOB blob;
1187
1188                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1189
1190                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1191                           addrstr));
1192
1193                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1194
1195                 status = messaging_send(state->msg_ctx,
1196                                         messaging_server_id(state->msg_ctx),
1197                                         MSG_WINBIND_IP_DROPPED, &blob);
1198                 if (!NT_STATUS_IS_OK(status)) {
1199                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1200                                    nt_errstr(status)));
1201                 }
1202         }
1203         req = addrchange_send(state, state->ev, state->ctx);
1204         if (req == NULL) {
1205                 DEBUG(0, ("addrchange_send failed\n"));
1206                 TALLOC_FREE(state);
1207                 return;
1208         }
1209         tevent_req_set_callback(req, winbindd_addr_changed, state);
1210 }
1211
1212 /* Main function */
1213
1214 int main(int argc, char **argv, char **envp)
1215 {
1216         static bool is_daemon = False;
1217         static bool Fork = True;
1218         static bool log_stdout = False;
1219         static bool no_process_group = False;
1220         enum {
1221                 OPT_DAEMON = 1000,
1222                 OPT_FORK,
1223                 OPT_NO_PROCESS_GROUP,
1224                 OPT_LOG_STDOUT
1225         };
1226         struct poptOption long_options[] = {
1227                 POPT_AUTOHELP
1228                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1229                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1230                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1231                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1232                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1233                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1234                 POPT_COMMON_SAMBA
1235                 POPT_TABLEEND
1236         };
1237         poptContext pc;
1238         int opt;
1239         TALLOC_CTX *frame;
1240         NTSTATUS status;
1241
1242         /*
1243          * Do this before any other talloc operation
1244          */
1245         talloc_enable_null_tracking();
1246         frame = talloc_stackframe();
1247
1248         /* glibc (?) likes to print "User defined signal 1" and exit if a
1249            SIGUSR[12] is received before a handler is installed */
1250
1251         CatchSignal(SIGUSR1, SIG_IGN);
1252         CatchSignal(SIGUSR2, SIG_IGN);
1253
1254         fault_setup((void (*)(void *))fault_quit );
1255         dump_core_setup("winbindd");
1256
1257         load_case_tables();
1258
1259         /* Initialise for running in non-root mode */
1260
1261         sec_init();
1262
1263         set_remote_machine_name("winbindd", False);
1264
1265         /* Set environment variable so we don't recursively call ourselves.
1266            This may also be useful interactively. */
1267
1268         if ( !winbind_off() ) {
1269                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1270                 exit(1);
1271         }
1272
1273         /* Initialise samba/rpc client stuff */
1274
1275         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1276
1277         while ((opt = poptGetNextOpt(pc)) != -1) {
1278                 switch (opt) {
1279                         /* Don't become a daemon */
1280                 case OPT_DAEMON:
1281                         is_daemon = True;
1282                         break;
1283                 case 'i':
1284                         interactive = True;
1285                         log_stdout = True;
1286                         Fork = False;
1287                         break;
1288                 case OPT_FORK:
1289                         Fork = false;
1290                         break;
1291                 case OPT_NO_PROCESS_GROUP:
1292                         no_process_group = true;
1293                         break;
1294                 case OPT_LOG_STDOUT:
1295                         log_stdout = true;
1296                         break;
1297                 case 'n':
1298                         opt_nocache = true;
1299                         break;
1300                 default:
1301                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1302                                   poptBadOption(pc, 0), poptStrerror(opt));
1303                         poptPrintUsage(pc, stderr, 0);
1304                         exit(1);
1305                 }
1306         }
1307
1308         /* We call dump_core_setup one more time because the command line can
1309          * set the log file or the log-basename and this will influence where
1310          * cores are stored. Without this call get_dyn_LOGFILEBASE will be
1311          * the default value derived from build's prefix. For EOM this value
1312          * is often not related to the path where winbindd is actually run
1313          * in production.
1314          */
1315         dump_core_setup("winbindd");
1316
1317         if (is_daemon && interactive) {
1318                 d_fprintf(stderr,"\nERROR: "
1319                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1320                 poptPrintUsage(pc, stderr, 0);
1321                 exit(1);
1322         }
1323
1324         if (log_stdout && Fork) {
1325                 d_fprintf(stderr, "\nERROR: "
1326                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1327                 poptPrintUsage(pc, stderr, 0);
1328                 exit(1);
1329         }
1330
1331         poptFreeContext(pc);
1332
1333         if (!override_logfile) {
1334                 char *lfile = NULL;
1335                 if (asprintf(&lfile,"%s/log.winbindd",
1336                                 get_dyn_LOGFILEBASE()) > 0) {
1337                         lp_set_logfile(lfile);
1338                         SAFE_FREE(lfile);
1339                 }
1340         }
1341         if (log_stdout) {
1342                 setup_logging("winbindd", DEBUG_STDOUT);
1343         } else {
1344                 setup_logging("winbindd", DEBUG_FILE);
1345         }
1346         reopen_logs();
1347
1348         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1349         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1350
1351         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1352                 DEBUG(0, ("error opening config file\n"));
1353                 exit(1);
1354         }
1355         /* After parsing the configuration file we setup the core path one more time
1356          * as the log file might have been set in the configuration and cores's
1357          * path is by default basename(lp_logfile()).
1358          */
1359         dump_core_setup("winbindd");
1360
1361         /* Initialise messaging system */
1362
1363         if (winbind_messaging_context() == NULL) {
1364                 exit(1);
1365         }
1366
1367         if (!reload_services_file(NULL)) {
1368                 DEBUG(0, ("error opening config file\n"));
1369                 exit(1);
1370         }
1371
1372         if (!directory_exist(lp_lockdir())) {
1373                 mkdir(lp_lockdir(), 0755);
1374         }
1375
1376         /* Setup names. */
1377
1378         if (!init_names())
1379                 exit(1);
1380
1381         load_interfaces();
1382
1383         if (!secrets_init()) {
1384
1385                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1386                 return False;
1387         }
1388
1389         /* Unblock all signals we are interested in as they may have been
1390            blocked by the parent process. */
1391
1392         BlockSignals(False, SIGINT);
1393         BlockSignals(False, SIGQUIT);
1394         BlockSignals(False, SIGTERM);
1395         BlockSignals(False, SIGUSR1);
1396         BlockSignals(False, SIGUSR2);
1397         BlockSignals(False, SIGHUP);
1398         BlockSignals(False, SIGCHLD);
1399
1400         if (!interactive)
1401                 become_daemon(Fork, no_process_group, log_stdout);
1402
1403         pidfile_create("winbindd");
1404
1405 #if HAVE_SETPGID
1406         /*
1407          * If we're interactive we want to set our own process group for
1408          * signal management.
1409          */
1410         if (interactive && !no_process_group)
1411                 setpgid( (pid_t)0, (pid_t)0);
1412 #endif
1413
1414         TimeInit();
1415
1416         /* Don't use winbindd_reinit_after_fork here as
1417          * we're just starting up and haven't created any
1418          * winbindd-specific resources we must free yet. JRA.
1419          */
1420
1421         status = reinit_after_fork(winbind_messaging_context(),
1422                                    winbind_event_context(),
1423                                    procid_self(), false);
1424         if (!NT_STATUS_IS_OK(status)) {
1425                 DEBUG(0,("reinit_after_fork() failed\n"));
1426                 exit(1);
1427         }
1428
1429         winbindd_register_handlers();
1430
1431         status = init_system_info();
1432         if (!NT_STATUS_IS_OK(status)) {
1433                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1434                           nt_errstr(status)));
1435                 exit(1);
1436         }
1437
1438         rpc_lsarpc_init(NULL);
1439         rpc_samr_init(NULL);
1440
1441         winbindd_init_addrchange(NULL, winbind_event_context(),
1442                                  winbind_messaging_context());
1443
1444         /* setup listen sockets */
1445
1446         if (!winbindd_setup_listeners()) {
1447                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1448                 exit(1);
1449         }
1450
1451         TALLOC_FREE(frame);
1452         /* Loop waiting for requests */
1453         while (1) {
1454                 frame = talloc_stackframe();
1455
1456                 if (tevent_loop_once(winbind_event_context()) == -1) {
1457                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1458                                   strerror(errno)));
1459                         return 1;
1460                 }
1461
1462                 TALLOC_FREE(frame);
1463         }
1464
1465         return 0;
1466 }