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_global(get_dyn_CONFIGFILE());
  83
  84         reopen_logs();
  85         load_interfaces();
  86
  87         return(ret);
  88 }
  89
  90
  91 static void winbindd_status(void)
  92 {
  93         struct winbindd_cli_state *tmp;
  94
  95         DEBUG(0, ("winbindd status:\n"));
  96
  97         /* Print client state information */
  98
  99         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 100
 101         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 102                 DEBUG(2, ("\tclient list:\n"));
 103                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 104                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 105                                      (unsigned long)tmp->pid, tmp->sock,
 106                                      client_is_idle(tmp) ? "idle" : "active"));
 107                 }
 108         }
 109 }
 110
 111 /* Flush client cache */
 112
 113 static void flush_caches(void)
 114 {
 115         /* We need to invalidate cached user list entries on a SIGHUP
 116            otherwise cached access denied errors due to restrict anonymous
 117            hang around until the sequence number changes. */
 118
 119         if (!wcache_invalidate_cache()) {
 120                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 121                 if (!winbindd_cache_validate_and_initialize()) {
 122                         exit(1);
 123                 }
 124         }
 125 }
 126
 127 static void flush_caches_noinit(void)
 128 {
 129         /*
 130          * We need to invalidate cached user list entries on a SIGHUP
 131          * otherwise cached access denied errors due to restrict anonymous
 132          * hang around until the sequence number changes.
 133          * NB
 134          * Skip uninitialized domains when flush cache.
 135          * If domain is not initialized, it means it is never
 136          * used or never become online. look, wcache_invalidate_cache()
 137          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 138          * for unused domains and large traffic for primay domain's DC if there
 139          * are many domains..
 140          */
 141
 142         if (!wcache_invalidate_cache_noinit()) {
 143                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 144                 if (!winbindd_cache_validate_and_initialize()) {
 145                         exit(1);
 146                 }
 147         }
 148 }
 149
 150 /* Handle the signal by unlinking socket and exiting */
 151
 152 static void terminate(bool is_parent)
 153 {
 154         if (is_parent) {
 155                 /* When parent goes away we should
 156                  * remove the socket file. Not so
 157                  * when children terminate.
 158                  */
 159                 char *path = NULL;
 160
 161                 if (asprintf(&path, "%s/%s",
 162                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 163                         unlink(path);
 164                         SAFE_FREE(path);
 165                 }
 166         }
 167
 168         idmap_close();
 169
 170         trustdom_cache_shutdown();
 171
 172         gencache_stabilize();
 173
 174 #if 0
 175         if (interactive) {
 176                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 177                 char *description = talloc_describe_all(mem_ctx);
 178
 179                 DEBUG(3, ("tallocs left:\n%s\n", description));
 180                 talloc_destroy(mem_ctx);
 181         }
 182 #endif
 183
 184         if (is_parent) {
 185                 serverid_deregister(procid_self());
 186                 pidfile_unlink();
 187         }
 188
 189         exit(0);
 190 }
 191
 192 static void winbindd_sig_term_handler(struct tevent_context *ev,
 193                                       struct tevent_signal *se,
 194                                       int signum,
 195                                       int count,
 196                                       void *siginfo,
 197                                       void *private_data)
 198 {
 199         bool *is_parent = talloc_get_type_abort(private_data, bool);
 200
 201         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 202                  signum, (int)*is_parent));
 203         terminate(*is_parent);
 204 }
 205
 206 /*
 207   handle stdin becoming readable when we are in --foreground mode
 208  */
 209 static void winbindd_stdin_handler(struct tevent_context *ev,
 210                                struct tevent_fd *fde,
 211                                uint16_t flags,
 212                                void *private_data)
 213 {
 214         char c;
 215         if (read(0, &c, 1) != 1) {
 216                 bool *is_parent = talloc_get_type_abort(private_data, bool);
 217
 218                 /* we have reached EOF on stdin, which means the
 219                    parent has exited. Shutdown the server */
 220                 DEBUG(0,("EOF on stdin (is_parent=%d)\n",
 221                          (int)*is_parent));
 222                 terminate(*is_parent);
 223         }
 224 }
 225
 226 bool winbindd_setup_sig_term_handler(bool parent)
 227 {
 228         struct tevent_signal *se;
 229         bool *is_parent;
 230
 231         is_parent = talloc(winbind_event_context(), bool);
 232         if (!is_parent) {
 233                 return false;
 234         }
 235
 236         *is_parent = parent;
 237
 238         se = tevent_add_signal(winbind_event_context(),
 239                                is_parent,
 240                                SIGTERM, 0,
 241                                winbindd_sig_term_handler,
 242                                is_parent);
 243         if (!se) {
 244                 DEBUG(0,("failed to setup SIGTERM handler"));
 245                 talloc_free(is_parent);
 246                 return false;
 247         }
 248
 249         se = tevent_add_signal(winbind_event_context(),
 250                                is_parent,
 251                                SIGINT, 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         se = tevent_add_signal(winbind_event_context(),
 261                                is_parent,
 262                                SIGQUIT, 0,
 263                                winbindd_sig_term_handler,
 264                                is_parent);
 265         if (!se) {
 266                 DEBUG(0,("failed to setup SIGINT handler"));
 267                 talloc_free(is_parent);
 268                 return false;
 269         }
 270
 271         return true;
 272 }
 273
 274 bool winbindd_setup_stdin_handler(bool parent, bool foreground)
 275 {
 276         bool *is_parent;
 277
 278         if (foreground) {
 279                 is_parent = talloc(winbind_event_context(), bool);
 280                 if (!is_parent) {
 281                         return false;
 282                 }
 283
 284                 *is_parent = parent;
 285
 286                 /* if we are running in the foreground then look for
 287                    EOF on stdin, and exit if it happens. This allows
 288                    us to die if the parent process dies
 289                 */
 290                 tevent_add_fd(winbind_event_context(), is_parent, 0, TEVENT_FD_READ, winbindd_stdin_handler, is_parent);
 291         }
 292
 293         return true;
 294 }
 295
 296 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 297                                      struct tevent_signal *se,
 298                                      int signum,
 299                                      int count,
 300                                      void *siginfo,
 301                                      void *private_data)
 302 {
 303         const char *file = (const char *)private_data;
 304
 305         DEBUG(1,("Reloading services after SIGHUP\n"));
 306         flush_caches_noinit();
 307         reload_services_file(file);
 308 }
 309
 310 bool winbindd_setup_sig_hup_handler(const char *lfile)
 311 {
 312         struct tevent_signal *se;
 313         char *file = NULL;
 314
 315         if (lfile) {
 316                 file = talloc_strdup(winbind_event_context(),
 317                                      lfile);
 318                 if (!file) {
 319                         return false;
 320                 }
 321         }
 322
 323         se = tevent_add_signal(winbind_event_context(),
 324                                winbind_event_context(),
 325                                SIGHUP, 0,
 326                                winbindd_sig_hup_handler,
 327                                file);
 328         if (!se) {
 329                 return false;
 330         }
 331
 332         return true;
 333 }
 334
 335 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 336                                       struct tevent_signal *se,
 337                                       int signum,
 338                                       int count,
 339                                       void *siginfo,
 340                                       void *private_data)
 341 {
 342         pid_t pid;
 343
 344         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 345                 winbind_child_died(pid);
 346         }
 347 }
 348
 349 static bool winbindd_setup_sig_chld_handler(void)
 350 {
 351         struct tevent_signal *se;
 352
 353         se = tevent_add_signal(winbind_event_context(),
 354                                winbind_event_context(),
 355                                SIGCHLD, 0,
 356                                winbindd_sig_chld_handler,
 357                                NULL);
 358         if (!se) {
 359                 return false;
 360         }
 361
 362         return true;
 363 }
 364
 365 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 366                                       struct tevent_signal *se,
 367                                       int signum,
 368                                       int count,
 369                                       void *siginfo,
 370                                       void *private_data)
 371 {
 372         winbindd_status();
 373 }
 374
 375 static bool winbindd_setup_sig_usr2_handler(void)
 376 {
 377         struct tevent_signal *se;
 378
 379         se = tevent_add_signal(winbind_event_context(),
 380                                winbind_event_context(),
 381                                SIGUSR2, 0,
 382                                winbindd_sig_usr2_handler,
 383                                NULL);
 384         if (!se) {
 385                 return false;
 386         }
 387
 388         return true;
 389 }
 390
 391 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 392 static void msg_reload_services(struct messaging_context *msg,
 393                                 void *private_data,
 394                                 uint32_t msg_type,
 395                                 struct server_id server_id,
 396                                 DATA_BLOB *data)
 397 {
 398         /* Flush various caches */
 399         flush_caches();
 400         reload_services_file((const char *) private_data);
 401 }
 402
 403 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 404 static void msg_shutdown(struct messaging_context *msg,
 405                          void *private_data,
 406                          uint32_t msg_type,
 407                          struct server_id server_id,
 408                          DATA_BLOB *data)
 409 {
 410         /* only the parent waits for this message */
 411         DEBUG(0,("Got shutdown message\n"));
 412         terminate(true);
 413 }
 414
 415
 416 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 417                                        void *private_data,
 418                                        uint32_t msg_type,
 419                                        struct server_id server_id,
 420                                        DATA_BLOB *data)
 421 {
 422         uint8 ret;
 423         pid_t child_pid;
 424         NTSTATUS status;
 425
 426         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 427                    "message.\n"));
 428
 429         /*
 430          * call the validation code from a child:
 431          * so we don't block the main winbindd and the validation
 432          * code can safely use fork/waitpid...
 433          */
 434         child_pid = sys_fork();
 435
 436         if (child_pid == -1) {
 437                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 438                           strerror(errno)));
 439                 return;
 440         }
 441
 442         if (child_pid != 0) {
 443                 /* parent */
 444                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 445                           "pid %d.\n", (int)child_pid));
 446                 return;
 447         }
 448
 449         /* child */
 450
 451         status = winbindd_reinit_after_fork(NULL, NULL);
 452         if (!NT_STATUS_IS_OK(status)) {
 453                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 454                           nt_errstr(status)));
 455                 _exit(0);
 456         }
 457
 458         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 459         CatchSignal(SIGCHLD, SIG_DFL);
 460
 461         ret = (uint8)winbindd_validate_cache_nobackup();
 462         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 463         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 464                            (size_t)1);
 465         _exit(0);
 466 }
 467
 468 static struct winbindd_dispatch_table {
 469         enum winbindd_cmd cmd;
 470         void (*fn)(struct winbindd_cli_state *state);
 471         const char *winbindd_cmd_name;
 472 } dispatch_table[] = {
 473
 474         /* Enumeration functions */
 475
 476         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 477           "LIST_TRUSTDOM" },
 478
 479         /* Miscellaneous */
 480
 481         { WINBINDD_INFO, winbindd_info, "INFO" },
 482         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 483           "INTERFACE_VERSION" },
 484         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 485         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 486         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 487         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 488         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 489           "WINBINDD_PRIV_PIPE_DIR" },
 490
 491         /* Credential cache access */
 492         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 493         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 494
 495         /* End of list */
 496
 497         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 498 };
 499
 500 struct winbindd_async_dispatch_table {
 501         enum winbindd_cmd cmd;
 502         const char *cmd_name;
 503         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 504                                        struct tevent_context *ev,
 505                                        struct winbindd_cli_state *cli,
 506                                        struct winbindd_request *request);
 507         NTSTATUS (*recv_req)(struct tevent_req *req,
 508                              struct winbindd_response *presp);
 509 };
 510
 511 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 512         { WINBINDD_PING, "PING",
 513           wb_ping_send, wb_ping_recv },
 514         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 515           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 516         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 517           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 518         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 519           winbindd_lookupname_send, winbindd_lookupname_recv },
 520         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 521           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 522         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 523           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 524         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 525           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 526         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 527           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 528         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 529           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 530         { WINBINDD_GETPWSID, "GETPWSID",
 531           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 532         { WINBINDD_GETPWNAM, "GETPWNAM",
 533           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 534         { WINBINDD_GETPWUID, "GETPWUID",
 535           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 536         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 537           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 538         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 539           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 540         { WINBINDD_GETGROUPS, "GETGROUPS",
 541           winbindd_getgroups_send, winbindd_getgroups_recv },
 542         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 543           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 544         { WINBINDD_GETGRGID, "GETGRGID",
 545           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 546         { WINBINDD_GETGRNAM, "GETGRNAM",
 547           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 548         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 549           winbindd_getusersids_send, winbindd_getusersids_recv },
 550         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 551           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 552         { WINBINDD_SETPWENT, "SETPWENT",
 553           winbindd_setpwent_send, winbindd_setpwent_recv },
 554         { WINBINDD_GETPWENT, "GETPWENT",
 555           winbindd_getpwent_send, winbindd_getpwent_recv },
 556         { WINBINDD_ENDPWENT, "ENDPWENT",
 557           winbindd_endpwent_send, winbindd_endpwent_recv },
 558         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 559           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 560         { WINBINDD_GETDCNAME, "GETDCNAME",
 561           winbindd_getdcname_send, winbindd_getdcname_recv },
 562         { WINBINDD_SETGRENT, "SETGRENT",
 563           winbindd_setgrent_send, winbindd_setgrent_recv },
 564         { WINBINDD_GETGRENT, "GETGRENT",
 565           winbindd_getgrent_send, winbindd_getgrent_recv },
 566         { WINBINDD_ENDGRENT, "ENDGRENT",
 567           winbindd_endgrent_send, winbindd_endgrent_recv },
 568         { WINBINDD_LIST_USERS, "LIST_USERS",
 569           winbindd_list_users_send, winbindd_list_users_recv },
 570         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 571           winbindd_list_groups_send, winbindd_list_groups_recv },
 572         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 573           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 574         { WINBINDD_PING_DC, "PING_DC",
 575           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 576         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 577           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 578         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 579           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 580         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 581           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 582         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 583           winbindd_pam_chng_pswd_auth_crap_send,
 584           winbindd_pam_chng_pswd_auth_crap_recv },
 585         { WINBINDD_WINS_BYIP, "WINS_BYIP",
 586           winbindd_wins_byip_send, winbindd_wins_byip_recv },
 587         { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
 588           winbindd_wins_byname_send, winbindd_wins_byname_recv },
 589
 590         { 0, NULL, NULL, NULL }
 591 };
 592
 593 static struct winbindd_async_dispatch_table async_priv_table[] = {
 594         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 595           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 596         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 597           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 598         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 599           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 600         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 601           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 602
 603         { 0, NULL, NULL, NULL }
 604 };
 605
 606 static void wb_request_done(struct tevent_req *req);
 607
 608 static void process_request(struct winbindd_cli_state *state)
 609 {
 610         struct winbindd_dispatch_table *table = dispatch_table;
 611         struct winbindd_async_dispatch_table *atable;
 612
 613         state->mem_ctx = talloc_named(state, 0, "winbind request");
 614         if (state->mem_ctx == NULL)
 615                 return;
 616
 617         /* Remember who asked us. */
 618         state->pid = state->request->pid;
 619
 620         state->cmd_name = "unknown request";
 621         state->recv_fn = NULL;
 622
 623         /* Process command */
 624
 625         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 626                 if (state->request->cmd == atable->cmd) {
 627                         break;
 628                 }
 629         }
 630
 631         if ((atable->send_req == NULL) && state->privileged) {
 632                 for (atable = async_priv_table; atable->send_req;
 633                      atable += 1) {
 634                         if (state->request->cmd == atable->cmd) {
 635                                 break;
 636                         }
 637                 }
 638         }
 639
 640         if (atable->send_req != NULL) {
 641                 struct tevent_req *req;
 642
 643                 state->cmd_name = atable->cmd_name;
 644                 state->recv_fn = atable->recv_req;
 645
 646                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 647                            (int)state->pid, state->cmd_name));
 648
 649                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 650                                        state, state->request);
 651                 if (req == NULL) {
 652                         DEBUG(0, ("process_request: atable->send failed for "
 653                                   "%s\n", atable->cmd_name));
 654                         request_error(state);
 655                         return;
 656                 }
 657                 tevent_req_set_callback(req, wb_request_done, state);
 658                 return;
 659         }
 660
 661         state->response = talloc_zero(state->mem_ctx,
 662                                       struct winbindd_response);
 663         if (state->response == NULL) {
 664                 DEBUG(10, ("talloc failed\n"));
 665                 remove_client(state);
 666                 return;
 667         }
 668         state->response->result = WINBINDD_PENDING;
 669         state->response->length = sizeof(struct winbindd_response);
 670
 671         for (table = dispatch_table; table->fn; table++) {
 672                 if (state->request->cmd == table->cmd) {
 673                         DEBUG(10,("process_request: request fn %s\n",
 674                                   table->winbindd_cmd_name ));
 675                         state->cmd_name = table->winbindd_cmd_name;
 676                         table->fn(state);
 677                         break;
 678                 }
 679         }
 680
 681         if (!table->fn) {
 682                 DEBUG(10,("process_request: unknown request fn number %d\n",
 683                           (int)state->request->cmd ));
 684                 request_error(state);
 685         }
 686 }
 687
 688 static void wb_request_done(struct tevent_req *req)
 689 {
 690         struct winbindd_cli_state *state = tevent_req_callback_data(
 691                 req, struct winbindd_cli_state);
 692         NTSTATUS status;
 693
 694         state->response = talloc_zero(state->mem_ctx,
 695                                       struct winbindd_response);
 696         if (state->response == NULL) {
 697                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 698                           (int)state->pid, state->cmd_name));
 699                 remove_client(state);
 700                 return;
 701         }
 702         state->response->result = WINBINDD_PENDING;
 703         state->response->length = sizeof(struct winbindd_response);
 704
 705         status = state->recv_fn(req, state->response);
 706         TALLOC_FREE(req);
 707
 708         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 709                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 710
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 request_error(state);
 713                 return;
 714         }
 715         request_ok(state);
 716 }
 717
 718 /*
 719  * This is the main event loop of winbind requests. It goes through a
 720  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 721  *
 722  * An idle winbind client has a read request of 4 bytes outstanding,
 723  * finalizing function is request_len_recv, checking the length. request_recv
 724  * then processes the packet. The processing function then at some point has
 725  * to call request_finished which schedules sending the response.
 726  */
 727
 728 static void request_finished(struct winbindd_cli_state *state);
 729
 730 static void winbind_client_request_read(struct tevent_req *req);
 731 static void winbind_client_response_written(struct tevent_req *req);
 732
 733 static void request_finished(struct winbindd_cli_state *state)
 734 {
 735         struct tevent_req *req;
 736
 737         TALLOC_FREE(state->request);
 738
 739         req = wb_resp_write_send(state, winbind_event_context(),
 740                                  state->out_queue, state->sock,
 741                                  state->response);
 742         if (req == NULL) {
 743                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 744                           (int)state->pid, state->cmd_name));
 745                 remove_client(state);
 746                 return;
 747         }
 748         tevent_req_set_callback(req, winbind_client_response_written, state);
 749 }
 750
 751 static void winbind_client_response_written(struct tevent_req *req)
 752 {
 753         struct winbindd_cli_state *state = tevent_req_callback_data(
 754                 req, struct winbindd_cli_state);
 755         ssize_t ret;
 756         int err;
 757
 758         ret = wb_resp_write_recv(req, &err);
 759         TALLOC_FREE(req);
 760         if (ret == -1) {
 761                 close(state->sock);
 762                 state->sock = -1;
 763                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 764                           (int)state->pid, state->cmd_name, strerror(err)));
 765                 remove_client(state);
 766                 return;
 767         }
 768
 769         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 770                   "to client\n", (int)state->pid, state->cmd_name));
 771
 772         TALLOC_FREE(state->mem_ctx);
 773         state->response = NULL;
 774         state->cmd_name = "no request";
 775         state->recv_fn = NULL;
 776
 777         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 778                                WINBINDD_MAX_EXTRA_DATA);
 779         if (req == NULL) {
 780                 remove_client(state);
 781                 return;
 782         }
 783         tevent_req_set_callback(req, winbind_client_request_read, state);
 784 }
 785
 786 void request_error(struct winbindd_cli_state *state)
 787 {
 788         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 789         state->response->result = WINBINDD_ERROR;
 790         request_finished(state);
 791 }
 792
 793 void request_ok(struct winbindd_cli_state *state)
 794 {
 795         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 796         state->response->result = WINBINDD_OK;
 797         request_finished(state);
 798 }
 799
 800 /* Process a new connection by adding it to the client connection list */
 801
 802 static void new_connection(int listen_sock, bool privileged)
 803 {
 804         struct sockaddr_un sunaddr;
 805         struct winbindd_cli_state *state;
 806         struct tevent_req *req;
 807         socklen_t len;
 808         int sock;
 809
 810         /* Accept connection */
 811
 812         len = sizeof(sunaddr);
 813
 814         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 815
 816         if (sock == -1) {
 817                 if (errno != EINTR) {
 818                         DEBUG(0, ("Faild to accept socket - %s\n",
 819                                   strerror(errno)));
 820                 }
 821                 return;
 822         }
 823
 824         DEBUG(6,("accepted socket %d\n", sock));
 825
 826         /* Create new connection structure */
 827
 828         if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
 829                 close(sock);
 830                 return;
 831         }
 832
 833         state->sock = sock;
 834
 835         state->out_queue = tevent_queue_create(state, "winbind client reply");
 836         if (state->out_queue == NULL) {
 837                 close(sock);
 838                 TALLOC_FREE(state);
 839                 return;
 840         }
 841
 842         state->last_access = time(NULL);
 843
 844         state->privileged = privileged;
 845
 846         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 847                                WINBINDD_MAX_EXTRA_DATA);
 848         if (req == NULL) {
 849                 TALLOC_FREE(state);
 850                 close(sock);
 851                 return;
 852         }
 853         tevent_req_set_callback(req, winbind_client_request_read, state);
 854
 855         /* Add to connection list */
 856
 857         winbindd_add_client(state);
 858 }
 859
 860 static void winbind_client_request_read(struct tevent_req *req)
 861 {
 862         struct winbindd_cli_state *state = tevent_req_callback_data(
 863                 req, struct winbindd_cli_state);
 864         ssize_t ret;
 865         int err;
 866
 867         ret = wb_req_read_recv(req, state, &state->request, &err);
 868         TALLOC_FREE(req);
 869         if (ret == -1) {
 870                 if (err == EPIPE) {
 871                         DEBUG(6, ("closing socket %d, client exited\n",
 872                                   state->sock));
 873                 } else {
 874                         DEBUG(2, ("Could not read client request from fd %d: "
 875                                   "%s\n", state->sock, strerror(err)));
 876                 }
 877                 close(state->sock);
 878                 state->sock = -1;
 879                 remove_client(state);
 880                 return;
 881         }
 882         process_request(state);
 883 }
 884
 885 /* Remove a client connection from client connection list */
 886
 887 static void remove_client(struct winbindd_cli_state *state)
 888 {
 889         char c = 0;
 890         int nwritten;
 891
 892         /* It's a dead client - hold a funeral */
 893
 894         if (state == NULL) {
 895                 return;
 896         }
 897
 898         if (state->sock != -1) {
 899                 /* tell client, we are closing ... */
 900                 nwritten = write(state->sock, &c, sizeof(c));
 901                 if (nwritten == -1) {
 902                         DEBUG(2, ("final write to client failed: %s\n",
 903                                 strerror(errno)));
 904                 }
 905
 906                 /* Close socket */
 907
 908                 close(state->sock);
 909                 state->sock = -1;
 910         }
 911
 912         TALLOC_FREE(state->mem_ctx);
 913
 914         /* Remove from list and free */
 915
 916         winbindd_remove_client(state);
 917         TALLOC_FREE(state);
 918 }
 919
 920 /* Is a client idle? */
 921
 922 static bool client_is_idle(struct winbindd_cli_state *state) {
 923   return (state->response == NULL &&
 924           !state->pwent_state && !state->grent_state);
 925 }
 926
 927 /* Shutdown client connection which has been idle for the longest time */
 928
 929 static bool remove_idle_client(void)
 930 {
 931         struct winbindd_cli_state *state, *remove_state = NULL;
 932         time_t last_access = 0;
 933         int nidle = 0;
 934
 935         for (state = winbindd_client_list(); state; state = state->next) {
 936                 if (client_is_idle(state)) {
 937                         nidle++;
 938                         if (!last_access || state->last_access < last_access) {
 939                                 last_access = state->last_access;
 940                                 remove_state = state;
 941                         }
 942                 }
 943         }
 944
 945         if (remove_state) {
 946                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 947                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 948                 remove_client(remove_state);
 949                 return True;
 950         }
 951
 952         return False;
 953 }
 954
 955 struct winbindd_listen_state {
 956         bool privileged;
 957         int fd;
 958 };
 959
 960 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 961                                         struct tevent_fd *fde,
 962                                         uint16_t flags,
 963                                         void *private_data)
 964 {
 965         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 966                                           struct winbindd_listen_state);
 967
 968         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 969                 DEBUG(5,("winbindd: Exceeding %d client "
 970                          "connections, removing idle "
 971                          "connection.\n", lp_winbind_max_clients()));
 972                 if (!remove_idle_client()) {
 973                         DEBUG(0,("winbindd: Exceeding %d "
 974                                  "client connections, no idle "
 975                                  "connection found\n",
 976                                  lp_winbind_max_clients()));
 977                         break;
 978                 }
 979         }
 980         new_connection(s->fd, s->privileged);
 981 }
 982
 983 /*
 984  * Winbindd socket accessor functions
 985  */
 986
 987 const char *get_winbind_pipe_dir(void)
 988 {
 989         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 990 }
 991
 992 char *get_winbind_priv_pipe_dir(void)
 993 {
 994         return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 995 }
 996
 997 static bool winbindd_setup_listeners(void)
 998 {
 999         struct winbindd_listen_state *pub_state = NULL;
1000         struct winbindd_listen_state *priv_state = NULL;
1001         struct tevent_fd *fde;
1002         int rc;
1003
1004         pub_state = talloc(winbind_event_context(),
1005                            struct winbindd_listen_state);
1006         if (!pub_state) {
1007                 goto failed;
1008         }
1009
1010         pub_state->privileged = false;
1011         pub_state->fd = create_pipe_sock(
1012                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
1013         if (pub_state->fd == -1) {
1014                 goto failed;
1015         }
1016         rc = listen(pub_state->fd, 5);
1017         if (rc < 0) {
1018                 goto failed;
1019         }
1020
1021         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1022                             TEVENT_FD_READ, winbindd_listen_fde_handler,
1023                             pub_state);
1024         if (fde == NULL) {
1025                 close(pub_state->fd);
1026                 goto failed;
1027         }
1028         tevent_fd_set_auto_close(fde);
1029
1030         priv_state = talloc(winbind_event_context(),
1031                             struct winbindd_listen_state);
1032         if (!priv_state) {
1033                 goto failed;
1034         }
1035
1036         priv_state->privileged = true;
1037         priv_state->fd = create_pipe_sock(
1038                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1039         if (priv_state->fd == -1) {
1040                 goto failed;
1041         }
1042         rc = listen(priv_state->fd, 5);
1043         if (rc < 0) {
1044                 goto failed;
1045         }
1046
1047         fde = tevent_add_fd(winbind_event_context(), priv_state,
1048                             priv_state->fd, TEVENT_FD_READ,
1049                             winbindd_listen_fde_handler, priv_state);
1050         if (fde == NULL) {
1051                 close(priv_state->fd);
1052                 goto failed;
1053         }
1054         tevent_fd_set_auto_close(fde);
1055
1056         return true;
1057 failed:
1058         TALLOC_FREE(pub_state);
1059         TALLOC_FREE(priv_state);
1060         return false;
1061 }
1062
1063 bool winbindd_use_idmap_cache(void)
1064 {
1065         return !opt_nocache;
1066 }
1067
1068 bool winbindd_use_cache(void)
1069 {
1070         return !opt_nocache;
1071 }
1072
1073 void winbindd_register_handlers(bool foreground)
1074 {
1075         /* Setup signal handlers */
1076
1077         if (!winbindd_setup_sig_term_handler(true))
1078                 exit(1);
1079         if (!winbindd_setup_stdin_handler(true, foreground))
1080                 exit(1);
1081         if (!winbindd_setup_sig_hup_handler(NULL))
1082                 exit(1);
1083         if (!winbindd_setup_sig_chld_handler())
1084                 exit(1);
1085         if (!winbindd_setup_sig_usr2_handler())
1086                 exit(1);
1087
1088         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1089
1090         /*
1091          * Ensure all cache and idmap caches are consistent
1092          * and initialized before we startup.
1093          */
1094         if (!winbindd_cache_validate_and_initialize()) {
1095                 exit(1);
1096         }
1097
1098         /* get broadcast messages */
1099
1100         if (!serverid_register(procid_self(),
1101                                FLAG_MSG_GENERAL |
1102                                FLAG_MSG_WINBIND |
1103                                FLAG_MSG_DBWRAP)) {
1104                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1105                 exit(1);
1106         }
1107
1108         /* React on 'smbcontrol winbindd reload-config' in the same way
1109            as to SIGHUP signal */
1110         messaging_register(winbind_messaging_context(), NULL,
1111                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1112         messaging_register(winbind_messaging_context(), NULL,
1113                            MSG_SHUTDOWN, msg_shutdown);
1114
1115         /* Handle online/offline messages. */
1116         messaging_register(winbind_messaging_context(), NULL,
1117                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1118         messaging_register(winbind_messaging_context(), NULL,
1119                            MSG_WINBIND_ONLINE, winbind_msg_online);
1120         messaging_register(winbind_messaging_context(), NULL,
1121                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1122
1123         messaging_register(winbind_messaging_context(), NULL,
1124                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1125
1126         messaging_register(winbind_messaging_context(), NULL,
1127                            MSG_WINBIND_VALIDATE_CACHE,
1128                            winbind_msg_validate_cache);
1129
1130         messaging_register(winbind_messaging_context(), NULL,
1131                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1132                            winbind_msg_dump_domain_list);
1133
1134         messaging_register(winbind_messaging_context(), NULL,
1135                            MSG_WINBIND_IP_DROPPED,
1136                            winbind_msg_ip_dropped_parent);
1137
1138         /* Register handler for MSG_DEBUG. */
1139         messaging_register(winbind_messaging_context(), NULL,
1140                            MSG_DEBUG,
1141                            winbind_msg_debug);
1142
1143         netsamlogon_cache_init(); /* Non-critical */
1144
1145         /* clear the cached list of trusted domains */
1146
1147         wcache_tdc_clear();
1148
1149         if (!init_domain_list()) {
1150                 DEBUG(0,("unable to initialize domain list\n"));
1151                 exit(1);
1152         }
1153
1154         init_idmap_child();
1155         init_locator_child();
1156
1157         smb_nscd_flush_user_cache();
1158         smb_nscd_flush_group_cache();
1159
1160         if (lp_allow_trusted_domains()) {
1161                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1162                               rescan_trusted_domains, NULL) == NULL) {
1163                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1164                         exit(1);
1165                 }
1166         }
1167
1168 }
1169
1170 struct winbindd_addrchanged_state {
1171         struct addrchange_context *ctx;
1172         struct tevent_context *ev;
1173         struct messaging_context *msg_ctx;
1174 };
1175
1176 static void winbindd_addr_changed(struct tevent_req *req);
1177
1178 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1179                                      struct tevent_context *ev,
1180                                      struct messaging_context *msg_ctx)
1181 {
1182         struct winbindd_addrchanged_state *state;
1183         struct tevent_req *req;
1184         NTSTATUS status;
1185
1186         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1187         if (state == NULL) {
1188                 DEBUG(10, ("talloc failed\n"));
1189                 return;
1190         }
1191         state->ev = ev;
1192         state->msg_ctx = msg_ctx;
1193
1194         status = addrchange_context_create(state, &state->ctx);
1195         if (!NT_STATUS_IS_OK(status)) {
1196                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1197                            nt_errstr(status)));
1198                 TALLOC_FREE(state);
1199                 return;
1200         }
1201         req = addrchange_send(state, ev, state->ctx);
1202         if (req == NULL) {
1203                 DEBUG(0, ("addrchange_send failed\n"));
1204                 TALLOC_FREE(state);
1205                 return;
1206         }
1207         tevent_req_set_callback(req, winbindd_addr_changed, state);
1208 }
1209
1210 static void winbindd_addr_changed(struct tevent_req *req)
1211 {
1212         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1213                 req, struct winbindd_addrchanged_state);
1214         enum addrchange_type type;
1215         struct sockaddr_storage addr;
1216         NTSTATUS status;
1217
1218         status = addrchange_recv(req, &type, &addr);
1219         TALLOC_FREE(req);
1220         if (!NT_STATUS_IS_OK(status)) {
1221                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1222                            nt_errstr(status)));
1223                 TALLOC_FREE(state);
1224                 return;
1225         }
1226         if (type == ADDRCHANGE_DEL) {
1227                 char addrstr[INET6_ADDRSTRLEN];
1228                 DATA_BLOB blob;
1229
1230                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1231
1232                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1233                           addrstr));
1234
1235                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1236
1237                 status = messaging_send(state->msg_ctx,
1238                                         messaging_server_id(state->msg_ctx),
1239                                         MSG_WINBIND_IP_DROPPED, &blob);
1240                 if (!NT_STATUS_IS_OK(status)) {
1241                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1242                                    nt_errstr(status)));
1243                 }
1244         }
1245         req = addrchange_send(state, state->ev, state->ctx);
1246         if (req == NULL) {
1247                 DEBUG(0, ("addrchange_send failed\n"));
1248                 TALLOC_FREE(state);
1249                 return;
1250         }
1251         tevent_req_set_callback(req, winbindd_addr_changed, state);
1252 }
1253
1254 /* Main function */
1255
1256 int main(int argc, char **argv, char **envp)
1257 {
1258         static bool is_daemon = False;
1259         static bool Fork = True;
1260         static bool log_stdout = False;
1261         static bool no_process_group = False;
1262         enum {
1263                 OPT_DAEMON = 1000,
1264                 OPT_FORK,
1265                 OPT_NO_PROCESS_GROUP,
1266                 OPT_LOG_STDOUT
1267         };
1268         struct poptOption long_options[] = {
1269                 POPT_AUTOHELP
1270                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1271                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1272                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1273                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1274                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1275                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1276                 POPT_COMMON_SAMBA
1277                 POPT_TABLEEND
1278         };
1279         poptContext pc;
1280         int opt;
1281         TALLOC_CTX *frame;
1282         NTSTATUS status;
1283
1284         /*
1285          * Do this before any other talloc operation
1286          */
1287         talloc_enable_null_tracking();
1288         frame = talloc_stackframe();
1289
1290         setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1291
1292         /* glibc (?) likes to print "User defined signal 1" and exit if a
1293            SIGUSR[12] is received before a handler is installed */
1294
1295         CatchSignal(SIGUSR1, SIG_IGN);
1296         CatchSignal(SIGUSR2, SIG_IGN);
1297
1298         fault_setup();
1299         dump_core_setup("winbindd", lp_logfile());
1300
1301         load_case_tables();
1302
1303         /* Initialise for running in non-root mode */
1304
1305         sec_init();
1306
1307         set_remote_machine_name("winbindd", False);
1308
1309         /* Set environment variable so we don't recursively call ourselves.
1310            This may also be useful interactively. */
1311
1312         if ( !winbind_off() ) {
1313                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1314                 exit(1);
1315         }
1316
1317         /* Initialise samba/rpc client stuff */
1318
1319         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1320
1321         while ((opt = poptGetNextOpt(pc)) != -1) {
1322                 switch (opt) {
1323                         /* Don't become a daemon */
1324                 case OPT_DAEMON:
1325                         is_daemon = True;
1326                         break;
1327                 case 'i':
1328                         interactive = True;
1329                         log_stdout = True;
1330                         Fork = False;
1331                         break;
1332                 case OPT_FORK:
1333                         Fork = false;
1334                         break;
1335                 case OPT_NO_PROCESS_GROUP:
1336                         no_process_group = true;
1337                         break;
1338                 case OPT_LOG_STDOUT:
1339                         log_stdout = true;
1340                         break;
1341                 case 'n':
1342                         opt_nocache = true;
1343                         break;
1344                 default:
1345                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1346                                   poptBadOption(pc, 0), poptStrerror(opt));
1347                         poptPrintUsage(pc, stderr, 0);
1348                         exit(1);
1349                 }
1350         }
1351
1352         if (is_daemon && interactive) {
1353                 d_fprintf(stderr,"\nERROR: "
1354                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1355                 poptPrintUsage(pc, stderr, 0);
1356                 exit(1);
1357         }
1358
1359         if (log_stdout && Fork) {
1360                 d_fprintf(stderr, "\nERROR: "
1361                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1362                 poptPrintUsage(pc, stderr, 0);
1363                 exit(1);
1364         }
1365
1366         poptFreeContext(pc);
1367
1368         if (!override_logfile) {
1369                 char *lfile = NULL;
1370                 if (asprintf(&lfile,"%s/log.winbindd",
1371                                 get_dyn_LOGFILEBASE()) > 0) {
1372                         lp_set_logfile(lfile);
1373                         SAFE_FREE(lfile);
1374                 }
1375         }
1376
1377         if (log_stdout) {
1378                 setup_logging("winbindd", DEBUG_STDOUT);
1379         } else {
1380                 setup_logging("winbindd", DEBUG_FILE);
1381         }
1382         reopen_logs();
1383
1384         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1385         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1386
1387         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1388                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1389                 exit(1);
1390         }
1391
1392         /* Initialise messaging system */
1393
1394         if (winbind_messaging_context() == NULL) {
1395                 exit(1);
1396         }
1397
1398         if (!reload_services_file(NULL)) {
1399                 DEBUG(0, ("error opening config file\n"));
1400                 exit(1);
1401         }
1402
1403         if (!directory_exist(lp_lockdir())) {
1404                 mkdir(lp_lockdir(), 0755);
1405         }
1406
1407         if (!directory_exist(lp_piddir())) {
1408                 mkdir(lp_piddir(), 0755);
1409         }
1410
1411         /* Setup names. */
1412
1413         if (!init_names())
1414                 exit(1);
1415
1416         load_interfaces();
1417
1418         if (!secrets_init()) {
1419
1420                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1421                 return False;
1422         }
1423
1424         /* Unblock all signals we are interested in as they may have been
1425            blocked by the parent process. */
1426
1427         BlockSignals(False, SIGINT);
1428         BlockSignals(False, SIGQUIT);
1429         BlockSignals(False, SIGTERM);
1430         BlockSignals(False, SIGUSR1);
1431         BlockSignals(False, SIGUSR2);
1432         BlockSignals(False, SIGHUP);
1433         BlockSignals(False, SIGCHLD);
1434
1435         if (!interactive)
1436                 become_daemon(Fork, no_process_group, log_stdout);
1437
1438         pidfile_create("winbindd");
1439
1440 #if HAVE_SETPGID
1441         /*
1442          * If we're interactive we want to set our own process group for
1443          * signal management.
1444          */
1445         if (interactive && !no_process_group)
1446                 setpgid( (pid_t)0, (pid_t)0);
1447 #endif
1448
1449         TimeInit();
1450
1451         /* Don't use winbindd_reinit_after_fork here as
1452          * we're just starting up and haven't created any
1453          * winbindd-specific resources we must free yet. JRA.
1454          */
1455
1456         status = reinit_after_fork(winbind_messaging_context(),
1457                                    winbind_event_context(),
1458                                    false);
1459         if (!NT_STATUS_IS_OK(status)) {
1460                 DEBUG(0,("reinit_after_fork() failed\n"));
1461                 exit(1);
1462         }
1463
1464         /*
1465          * Do not initialize the parent-child-pipe before becoming
1466          * a daemon: this is used to detect a died parent in the child
1467          * process.
1468          */
1469         status = init_before_fork();
1470         if (!NT_STATUS_IS_OK(status)) {
1471                 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status)));
1472                 exit(1);
1473         }
1474
1475         winbindd_register_handlers(!Fork);
1476
1477         status = init_system_info();
1478         if (!NT_STATUS_IS_OK(status)) {
1479                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1480                           nt_errstr(status)));
1481                 exit(1);
1482         }
1483
1484         rpc_lsarpc_init(NULL);
1485         rpc_samr_init(NULL);
1486
1487         winbindd_init_addrchange(NULL, winbind_event_context(),
1488                                  winbind_messaging_context());
1489
1490         /* setup listen sockets */
1491
1492         if (!winbindd_setup_listeners()) {
1493                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1494                 exit(1);
1495         }
1496
1497         TALLOC_FREE(frame);
1498         /* Loop waiting for requests */
1499         while (1) {
1500                 frame = talloc_stackframe();
1501
1502                 if (tevent_loop_once(winbind_event_context()) == -1) {
1503                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1504                                   strerror(errno)));
1505                         return 1;
1506                 }
1507
1508                 TALLOC_FREE(frame);
1509         }
1510
1511         return 0;
1512 }