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_global(get_dyn_CONFIGFILE());
  84
  85         reopen_logs();
  86         load_interfaces();
  87
  88         return(ret);
  89 }
  90
  91
  92 static void winbindd_status(void)
  93 {
  94         struct winbindd_cli_state *tmp;
  95
  96         DEBUG(0, ("winbindd status:\n"));
  97
  98         /* Print client state information */
  99
 100         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 101
 102         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 103                 DEBUG(2, ("\tclient list:\n"));
 104                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 105                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 106                                      (unsigned long)tmp->pid, tmp->sock,
 107                                      client_is_idle(tmp) ? "idle" : "active"));
 108                 }
 109         }
 110 }
 111
 112 /* Flush client cache */
 113
 114 static void flush_caches(void)
 115 {
 116         /* We need to invalidate cached user list entries on a SIGHUP
 117            otherwise cached access denied errors due to restrict anonymous
 118            hang around until the sequence number changes. */
 119
 120         if (!wcache_invalidate_cache()) {
 121                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 122                 if (!winbindd_cache_validate_and_initialize()) {
 123                         exit(1);
 124                 }
 125         }
 126 }
 127
 128 static void flush_caches_noinit(void)
 129 {
 130         /*
 131          * We need to invalidate cached user list entries on a SIGHUP
 132          * otherwise cached access denied errors due to restrict anonymous
 133          * hang around until the sequence number changes.
 134          * NB
 135          * Skip uninitialized domains when flush cache.
 136          * If domain is not initialized, it means it is never
 137          * used or never become online. look, wcache_invalidate_cache()
 138          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 139          * for unused domains and large traffic for primay domain's DC if there
 140          * are many domains..
 141          */
 142
 143         if (!wcache_invalidate_cache_noinit()) {
 144                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 145                 if (!winbindd_cache_validate_and_initialize()) {
 146                         exit(1);
 147                 }
 148         }
 149 }
 150
 151 /* Handle the signal by unlinking socket and exiting */
 152
 153 static void terminate(bool is_parent)
 154 {
 155         if (is_parent) {
 156                 /* When parent goes away we should
 157                  * remove the socket file. Not so
 158                  * when children terminate.
 159                  */
 160                 char *path = NULL;
 161
 162                 if (asprintf(&path, "%s/%s",
 163                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 164                         unlink(path);
 165                         SAFE_FREE(path);
 166                 }
 167         }
 168
 169         idmap_close();
 170
 171         trustdom_cache_shutdown();
 172
 173         gencache_stabilize();
 174
 175 #if 0
 176         if (interactive) {
 177                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 178                 char *description = talloc_describe_all(mem_ctx);
 179
 180                 DEBUG(3, ("tallocs left:\n%s\n", description));
 181                 talloc_destroy(mem_ctx);
 182         }
 183 #endif
 184
 185         if (is_parent) {
 186                 serverid_deregister(procid_self());
 187                 pidfile_unlink();
 188         }
 189
 190         exit(0);
 191 }
 192
 193 static void winbindd_sig_term_handler(struct tevent_context *ev,
 194                                       struct tevent_signal *se,
 195                                       int signum,
 196                                       int count,
 197                                       void *siginfo,
 198                                       void *private_data)
 199 {
 200         bool *is_parent = talloc_get_type_abort(private_data, bool);
 201
 202         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 203                  signum, (int)*is_parent));
 204         terminate(*is_parent);
 205 }
 206
 207 /*
 208   handle stdin becoming readable when we are in --foreground mode
 209  */
 210 static void winbindd_stdin_handler(struct tevent_context *ev,
 211                                struct tevent_fd *fde,
 212                                uint16_t flags,
 213                                void *private_data)
 214 {
 215         char c;
 216         if (read(0, &c, 1) != 1) {
 217                 bool *is_parent = talloc_get_type_abort(private_data, bool);
 218
 219                 /* we have reached EOF on stdin, which means the
 220                    parent has exited. Shutdown the server */
 221                 DEBUG(0,("EOF on stdin (is_parent=%d)\n",
 222                          (int)*is_parent));
 223                 terminate(*is_parent);
 224         }
 225 }
 226
 227 bool winbindd_setup_sig_term_handler(bool parent)
 228 {
 229         struct tevent_signal *se;
 230         bool *is_parent;
 231
 232         is_parent = talloc(winbind_event_context(), bool);
 233         if (!is_parent) {
 234                 return false;
 235         }
 236
 237         *is_parent = parent;
 238
 239         se = tevent_add_signal(winbind_event_context(),
 240                                is_parent,
 241                                SIGTERM, 0,
 242                                winbindd_sig_term_handler,
 243                                is_parent);
 244         if (!se) {
 245                 DEBUG(0,("failed to setup SIGTERM handler"));
 246                 talloc_free(is_parent);
 247                 return false;
 248         }
 249
 250         se = tevent_add_signal(winbind_event_context(),
 251                                is_parent,
 252                                SIGINT, 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         se = tevent_add_signal(winbind_event_context(),
 262                                is_parent,
 263                                SIGQUIT, 0,
 264                                winbindd_sig_term_handler,
 265                                is_parent);
 266         if (!se) {
 267                 DEBUG(0,("failed to setup SIGINT handler"));
 268                 talloc_free(is_parent);
 269                 return false;
 270         }
 271
 272         return true;
 273 }
 274
 275 bool winbindd_setup_stdin_handler(bool parent, bool foreground)
 276 {
 277         bool *is_parent;
 278
 279         if (foreground) {
 280                 is_parent = talloc(winbind_event_context(), bool);
 281                 if (!is_parent) {
 282                         return false;
 283                 }
 284
 285                 *is_parent = parent;
 286
 287                 /* if we are running in the foreground then look for
 288                    EOF on stdin, and exit if it happens. This allows
 289                    us to die if the parent process dies
 290                 */
 291                 tevent_add_fd(winbind_event_context(), is_parent, 0, TEVENT_FD_READ, winbindd_stdin_handler, is_parent);
 292         }
 293
 294         return true;
 295 }
 296
 297 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 298                                      struct tevent_signal *se,
 299                                      int signum,
 300                                      int count,
 301                                      void *siginfo,
 302                                      void *private_data)
 303 {
 304         const char *file = (const char *)private_data;
 305
 306         DEBUG(1,("Reloading services after SIGHUP\n"));
 307         flush_caches_noinit();
 308         reload_services_file(file);
 309 }
 310
 311 bool winbindd_setup_sig_hup_handler(const char *lfile)
 312 {
 313         struct tevent_signal *se;
 314         char *file = NULL;
 315
 316         if (lfile) {
 317                 file = talloc_strdup(winbind_event_context(),
 318                                      lfile);
 319                 if (!file) {
 320                         return false;
 321                 }
 322         }
 323
 324         se = tevent_add_signal(winbind_event_context(),
 325                                winbind_event_context(),
 326                                SIGHUP, 0,
 327                                winbindd_sig_hup_handler,
 328                                file);
 329         if (!se) {
 330                 return false;
 331         }
 332
 333         return true;
 334 }
 335
 336 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 337                                       struct tevent_signal *se,
 338                                       int signum,
 339                                       int count,
 340                                       void *siginfo,
 341                                       void *private_data)
 342 {
 343         pid_t pid;
 344
 345         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 346                 winbind_child_died(pid);
 347         }
 348 }
 349
 350 static bool winbindd_setup_sig_chld_handler(void)
 351 {
 352         struct tevent_signal *se;
 353
 354         se = tevent_add_signal(winbind_event_context(),
 355                                winbind_event_context(),
 356                                SIGCHLD, 0,
 357                                winbindd_sig_chld_handler,
 358                                NULL);
 359         if (!se) {
 360                 return false;
 361         }
 362
 363         return true;
 364 }
 365
 366 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 367                                       struct tevent_signal *se,
 368                                       int signum,
 369                                       int count,
 370                                       void *siginfo,
 371                                       void *private_data)
 372 {
 373         winbindd_status();
 374 }
 375
 376 static bool winbindd_setup_sig_usr2_handler(void)
 377 {
 378         struct tevent_signal *se;
 379
 380         se = tevent_add_signal(winbind_event_context(),
 381                                winbind_event_context(),
 382                                SIGUSR2, 0,
 383                                winbindd_sig_usr2_handler,
 384                                NULL);
 385         if (!se) {
 386                 return false;
 387         }
 388
 389         return true;
 390 }
 391
 392 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 393 static void msg_reload_services(struct messaging_context *msg,
 394                                 void *private_data,
 395                                 uint32_t msg_type,
 396                                 struct server_id server_id,
 397                                 DATA_BLOB *data)
 398 {
 399         /* Flush various caches */
 400         flush_caches();
 401         reload_services_file((const char *) private_data);
 402 }
 403
 404 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 405 static void msg_shutdown(struct messaging_context *msg,
 406                          void *private_data,
 407                          uint32_t msg_type,
 408                          struct server_id server_id,
 409                          DATA_BLOB *data)
 410 {
 411         /* only the parent waits for this message */
 412         DEBUG(0,("Got shutdown message\n"));
 413         terminate(true);
 414 }
 415
 416
 417 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 418                                        void *private_data,
 419                                        uint32_t msg_type,
 420                                        struct server_id server_id,
 421                                        DATA_BLOB *data)
 422 {
 423         uint8 ret;
 424         pid_t child_pid;
 425         NTSTATUS status;
 426
 427         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 428                    "message.\n"));
 429
 430         /*
 431          * call the validation code from a child:
 432          * so we don't block the main winbindd and the validation
 433          * code can safely use fork/waitpid...
 434          */
 435         child_pid = fork();
 436
 437         if (child_pid == -1) {
 438                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 439                           strerror(errno)));
 440                 return;
 441         }
 442
 443         if (child_pid != 0) {
 444                 /* parent */
 445                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 446                           "pid %d.\n", (int)child_pid));
 447                 return;
 448         }
 449
 450         /* child */
 451
 452         status = winbindd_reinit_after_fork(NULL, NULL);
 453         if (!NT_STATUS_IS_OK(status)) {
 454                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 455                           nt_errstr(status)));
 456                 _exit(0);
 457         }
 458
 459         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 460         CatchSignal(SIGCHLD, SIG_DFL);
 461
 462         ret = (uint8)winbindd_validate_cache_nobackup();
 463         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 464         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 465                            (size_t)1);
 466         _exit(0);
 467 }
 468
 469 static struct winbindd_dispatch_table {
 470         enum winbindd_cmd cmd;
 471         void (*fn)(struct winbindd_cli_state *state);
 472         const char *winbindd_cmd_name;
 473 } dispatch_table[] = {
 474
 475         /* Enumeration functions */
 476
 477         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 478           "LIST_TRUSTDOM" },
 479
 480         /* Miscellaneous */
 481
 482         { WINBINDD_INFO, winbindd_info, "INFO" },
 483         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 484           "INTERFACE_VERSION" },
 485         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 486         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 487         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 488         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 489         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 490           "WINBINDD_PRIV_PIPE_DIR" },
 491
 492         /* Credential cache access */
 493         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 494         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 495
 496         /* End of list */
 497
 498         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 499 };
 500
 501 struct winbindd_async_dispatch_table {
 502         enum winbindd_cmd cmd;
 503         const char *cmd_name;
 504         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 505                                        struct tevent_context *ev,
 506                                        struct winbindd_cli_state *cli,
 507                                        struct winbindd_request *request);
 508         NTSTATUS (*recv_req)(struct tevent_req *req,
 509                              struct winbindd_response *presp);
 510 };
 511
 512 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 513         { WINBINDD_PING, "PING",
 514           wb_ping_send, wb_ping_recv },
 515         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 516           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 517         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 518           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 519         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 520           winbindd_lookupname_send, winbindd_lookupname_recv },
 521         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 522           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 523         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 524           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 525         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 526           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 527         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 528           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 529         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 530           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 531         { WINBINDD_GETPWSID, "GETPWSID",
 532           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 533         { WINBINDD_GETPWNAM, "GETPWNAM",
 534           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 535         { WINBINDD_GETPWUID, "GETPWUID",
 536           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 537         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 538           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 539         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 540           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 541         { WINBINDD_GETGROUPS, "GETGROUPS",
 542           winbindd_getgroups_send, winbindd_getgroups_recv },
 543         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 544           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 545         { WINBINDD_GETGRGID, "GETGRGID",
 546           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 547         { WINBINDD_GETGRNAM, "GETGRNAM",
 548           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 549         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 550           winbindd_getusersids_send, winbindd_getusersids_recv },
 551         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 552           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 553         { WINBINDD_SETPWENT, "SETPWENT",
 554           winbindd_setpwent_send, winbindd_setpwent_recv },
 555         { WINBINDD_GETPWENT, "GETPWENT",
 556           winbindd_getpwent_send, winbindd_getpwent_recv },
 557         { WINBINDD_ENDPWENT, "ENDPWENT",
 558           winbindd_endpwent_send, winbindd_endpwent_recv },
 559         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 560           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 561         { WINBINDD_GETDCNAME, "GETDCNAME",
 562           winbindd_getdcname_send, winbindd_getdcname_recv },
 563         { WINBINDD_SETGRENT, "SETGRENT",
 564           winbindd_setgrent_send, winbindd_setgrent_recv },
 565         { WINBINDD_GETGRENT, "GETGRENT",
 566           winbindd_getgrent_send, winbindd_getgrent_recv },
 567         { WINBINDD_ENDGRENT, "ENDGRENT",
 568           winbindd_endgrent_send, winbindd_endgrent_recv },
 569         { WINBINDD_LIST_USERS, "LIST_USERS",
 570           winbindd_list_users_send, winbindd_list_users_recv },
 571         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 572           winbindd_list_groups_send, winbindd_list_groups_recv },
 573         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 574           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 575         { WINBINDD_PING_DC, "PING_DC",
 576           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 577         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 578           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 579         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 580           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 581         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 582           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 583         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 584           winbindd_pam_chng_pswd_auth_crap_send,
 585           winbindd_pam_chng_pswd_auth_crap_recv },
 586         { WINBINDD_WINS_BYIP, "WINS_BYIP",
 587           winbindd_wins_byip_send, winbindd_wins_byip_recv },
 588         { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
 589           winbindd_wins_byname_send, winbindd_wins_byname_recv },
 590
 591         { 0, NULL, NULL, NULL }
 592 };
 593
 594 static struct winbindd_async_dispatch_table async_priv_table[] = {
 595         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 596           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 597         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 598           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 599         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 600           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 601         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 602           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 603
 604         { 0, NULL, NULL, NULL }
 605 };
 606
 607 static void wb_request_done(struct tevent_req *req);
 608
 609 static void process_request(struct winbindd_cli_state *state)
 610 {
 611         struct winbindd_dispatch_table *table = dispatch_table;
 612         struct winbindd_async_dispatch_table *atable;
 613
 614         state->mem_ctx = talloc_named(state, 0, "winbind request");
 615         if (state->mem_ctx == NULL)
 616                 return;
 617
 618         /* Remember who asked us. */
 619         state->pid = state->request->pid;
 620
 621         state->cmd_name = "unknown request";
 622         state->recv_fn = NULL;
 623
 624         /* Process command */
 625
 626         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 627                 if (state->request->cmd == atable->cmd) {
 628                         break;
 629                 }
 630         }
 631
 632         if ((atable->send_req == NULL) && state->privileged) {
 633                 for (atable = async_priv_table; atable->send_req;
 634                      atable += 1) {
 635                         if (state->request->cmd == atable->cmd) {
 636                                 break;
 637                         }
 638                 }
 639         }
 640
 641         if (atable->send_req != NULL) {
 642                 struct tevent_req *req;
 643
 644                 state->cmd_name = atable->cmd_name;
 645                 state->recv_fn = atable->recv_req;
 646
 647                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 648                            (int)state->pid, state->cmd_name));
 649
 650                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 651                                        state, state->request);
 652                 if (req == NULL) {
 653                         DEBUG(0, ("process_request: atable->send failed for "
 654                                   "%s\n", atable->cmd_name));
 655                         request_error(state);
 656                         return;
 657                 }
 658                 tevent_req_set_callback(req, wb_request_done, state);
 659                 return;
 660         }
 661
 662         state->response = talloc_zero(state->mem_ctx,
 663                                       struct winbindd_response);
 664         if (state->response == NULL) {
 665                 DEBUG(10, ("talloc failed\n"));
 666                 remove_client(state);
 667                 return;
 668         }
 669         state->response->result = WINBINDD_PENDING;
 670         state->response->length = sizeof(struct winbindd_response);
 671
 672         for (table = dispatch_table; table->fn; table++) {
 673                 if (state->request->cmd == table->cmd) {
 674                         DEBUG(10,("process_request: request fn %s\n",
 675                                   table->winbindd_cmd_name ));
 676                         state->cmd_name = table->winbindd_cmd_name;
 677                         table->fn(state);
 678                         break;
 679                 }
 680         }
 681
 682         if (!table->fn) {
 683                 DEBUG(10,("process_request: unknown request fn number %d\n",
 684                           (int)state->request->cmd ));
 685                 request_error(state);
 686         }
 687 }
 688
 689 static void wb_request_done(struct tevent_req *req)
 690 {
 691         struct winbindd_cli_state *state = tevent_req_callback_data(
 692                 req, struct winbindd_cli_state);
 693         NTSTATUS status;
 694
 695         state->response = talloc_zero(state->mem_ctx,
 696                                       struct winbindd_response);
 697         if (state->response == NULL) {
 698                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 699                           (int)state->pid, state->cmd_name));
 700                 remove_client(state);
 701                 return;
 702         }
 703         state->response->result = WINBINDD_PENDING;
 704         state->response->length = sizeof(struct winbindd_response);
 705
 706         status = state->recv_fn(req, state->response);
 707         TALLOC_FREE(req);
 708
 709         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 710                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 711
 712         if (!NT_STATUS_IS_OK(status)) {
 713                 request_error(state);
 714                 return;
 715         }
 716         request_ok(state);
 717 }
 718
 719 /*
 720  * This is the main event loop of winbind requests. It goes through a
 721  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 722  *
 723  * An idle winbind client has a read request of 4 bytes outstanding,
 724  * finalizing function is request_len_recv, checking the length. request_recv
 725  * then processes the packet. The processing function then at some point has
 726  * to call request_finished which schedules sending the response.
 727  */
 728
 729 static void request_finished(struct winbindd_cli_state *state);
 730
 731 static void winbind_client_request_read(struct tevent_req *req);
 732 static void winbind_client_response_written(struct tevent_req *req);
 733
 734 static void request_finished(struct winbindd_cli_state *state)
 735 {
 736         struct tevent_req *req;
 737
 738         TALLOC_FREE(state->request);
 739
 740         req = wb_resp_write_send(state, winbind_event_context(),
 741                                  state->out_queue, state->sock,
 742                                  state->response);
 743         if (req == NULL) {
 744                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 745                           (int)state->pid, state->cmd_name));
 746                 remove_client(state);
 747                 return;
 748         }
 749         tevent_req_set_callback(req, winbind_client_response_written, state);
 750 }
 751
 752 static void winbind_client_response_written(struct tevent_req *req)
 753 {
 754         struct winbindd_cli_state *state = tevent_req_callback_data(
 755                 req, struct winbindd_cli_state);
 756         ssize_t ret;
 757         int err;
 758
 759         ret = wb_resp_write_recv(req, &err);
 760         TALLOC_FREE(req);
 761         if (ret == -1) {
 762                 close(state->sock);
 763                 state->sock = -1;
 764                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 765                           (int)state->pid, state->cmd_name, strerror(err)));
 766                 remove_client(state);
 767                 return;
 768         }
 769
 770         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 771                   "to client\n", (int)state->pid, state->cmd_name));
 772
 773         TALLOC_FREE(state->mem_ctx);
 774         state->response = NULL;
 775         state->cmd_name = "no request";
 776         state->recv_fn = NULL;
 777
 778         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 779                                WINBINDD_MAX_EXTRA_DATA);
 780         if (req == NULL) {
 781                 remove_client(state);
 782                 return;
 783         }
 784         tevent_req_set_callback(req, winbind_client_request_read, state);
 785 }
 786
 787 void request_error(struct winbindd_cli_state *state)
 788 {
 789         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 790         state->response->result = WINBINDD_ERROR;
 791         request_finished(state);
 792 }
 793
 794 void request_ok(struct winbindd_cli_state *state)
 795 {
 796         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 797         state->response->result = WINBINDD_OK;
 798         request_finished(state);
 799 }
 800
 801 /* Process a new connection by adding it to the client connection list */
 802
 803 static void new_connection(int listen_sock, bool privileged)
 804 {
 805         struct sockaddr_un sunaddr;
 806         struct winbindd_cli_state *state;
 807         struct tevent_req *req;
 808         socklen_t len;
 809         int sock;
 810
 811         /* Accept connection */
 812
 813         len = sizeof(sunaddr);
 814
 815         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 816
 817         if (sock == -1) {
 818                 if (errno != EINTR) {
 819                         DEBUG(0, ("Faild to accept socket - %s\n",
 820                                   strerror(errno)));
 821                 }
 822                 return;
 823         }
 824
 825         DEBUG(6,("accepted socket %d\n", sock));
 826
 827         /* Create new connection structure */
 828
 829         if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
 830                 close(sock);
 831                 return;
 832         }
 833
 834         state->sock = sock;
 835
 836         state->out_queue = tevent_queue_create(state, "winbind client reply");
 837         if (state->out_queue == NULL) {
 838                 close(sock);
 839                 TALLOC_FREE(state);
 840                 return;
 841         }
 842
 843         state->last_access = time(NULL);
 844
 845         state->privileged = privileged;
 846
 847         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 848                                WINBINDD_MAX_EXTRA_DATA);
 849         if (req == NULL) {
 850                 TALLOC_FREE(state);
 851                 close(sock);
 852                 return;
 853         }
 854         tevent_req_set_callback(req, winbind_client_request_read, state);
 855
 856         /* Add to connection list */
 857
 858         winbindd_add_client(state);
 859 }
 860
 861 static void winbind_client_request_read(struct tevent_req *req)
 862 {
 863         struct winbindd_cli_state *state = tevent_req_callback_data(
 864                 req, struct winbindd_cli_state);
 865         ssize_t ret;
 866         int err;
 867
 868         ret = wb_req_read_recv(req, state, &state->request, &err);
 869         TALLOC_FREE(req);
 870         if (ret == -1) {
 871                 if (err == EPIPE) {
 872                         DEBUG(6, ("closing socket %d, client exited\n",
 873                                   state->sock));
 874                 } else {
 875                         DEBUG(2, ("Could not read client request from fd %d: "
 876                                   "%s\n", state->sock, strerror(err)));
 877                 }
 878                 close(state->sock);
 879                 state->sock = -1;
 880                 remove_client(state);
 881                 return;
 882         }
 883         process_request(state);
 884 }
 885
 886 /* Remove a client connection from client connection list */
 887
 888 static void remove_client(struct winbindd_cli_state *state)
 889 {
 890         char c = 0;
 891         int nwritten;
 892
 893         /* It's a dead client - hold a funeral */
 894
 895         if (state == NULL) {
 896                 return;
 897         }
 898
 899         if (state->sock != -1) {
 900                 /* tell client, we are closing ... */
 901                 nwritten = write(state->sock, &c, sizeof(c));
 902                 if (nwritten == -1) {
 903                         DEBUG(2, ("final write to client failed: %s\n",
 904                                 strerror(errno)));
 905                 }
 906
 907                 /* Close socket */
 908
 909                 close(state->sock);
 910                 state->sock = -1;
 911         }
 912
 913         TALLOC_FREE(state->mem_ctx);
 914
 915         /* Remove from list and free */
 916
 917         winbindd_remove_client(state);
 918         TALLOC_FREE(state);
 919 }
 920
 921 /* Is a client idle? */
 922
 923 static bool client_is_idle(struct winbindd_cli_state *state) {
 924   return (state->response == NULL &&
 925           !state->pwent_state && !state->grent_state);
 926 }
 927
 928 /* Shutdown client connection which has been idle for the longest time */
 929
 930 static bool remove_idle_client(void)
 931 {
 932         struct winbindd_cli_state *state, *remove_state = NULL;
 933         time_t last_access = 0;
 934         int nidle = 0;
 935
 936         for (state = winbindd_client_list(); state; state = state->next) {
 937                 if (client_is_idle(state)) {
 938                         nidle++;
 939                         if (!last_access || state->last_access < last_access) {
 940                                 last_access = state->last_access;
 941                                 remove_state = state;
 942                         }
 943                 }
 944         }
 945
 946         if (remove_state) {
 947                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 948                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 949                 remove_client(remove_state);
 950                 return True;
 951         }
 952
 953         return False;
 954 }
 955
 956 struct winbindd_listen_state {
 957         bool privileged;
 958         int fd;
 959 };
 960
 961 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 962                                         struct tevent_fd *fde,
 963                                         uint16_t flags,
 964                                         void *private_data)
 965 {
 966         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 967                                           struct winbindd_listen_state);
 968
 969         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 970                 DEBUG(5,("winbindd: Exceeding %d client "
 971                          "connections, removing idle "
 972                          "connection.\n", lp_winbind_max_clients()));
 973                 if (!remove_idle_client()) {
 974                         DEBUG(0,("winbindd: Exceeding %d "
 975                                  "client connections, no idle "
 976                                  "connection found\n",
 977                                  lp_winbind_max_clients()));
 978                         break;
 979                 }
 980         }
 981         new_connection(s->fd, s->privileged);
 982 }
 983
 984 /*
 985  * Winbindd socket accessor functions
 986  */
 987
 988 const char *get_winbind_pipe_dir(void)
 989 {
 990         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 991 }
 992
 993 char *get_winbind_priv_pipe_dir(void)
 994 {
 995         return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 996 }
 997
 998 static bool winbindd_setup_listeners(void)
 999 {
1000         struct winbindd_listen_state *pub_state = NULL;
1001         struct winbindd_listen_state *priv_state = NULL;
1002         struct tevent_fd *fde;
1003         int rc;
1004
1005         pub_state = talloc(winbind_event_context(),
1006                            struct winbindd_listen_state);
1007         if (!pub_state) {
1008                 goto failed;
1009         }
1010
1011         pub_state->privileged = false;
1012         pub_state->fd = create_pipe_sock(
1013                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
1014         if (pub_state->fd == -1) {
1015                 goto failed;
1016         }
1017         rc = listen(pub_state->fd, 5);
1018         if (rc < 0) {
1019                 goto failed;
1020         }
1021
1022         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1023                             TEVENT_FD_READ, winbindd_listen_fde_handler,
1024                             pub_state);
1025         if (fde == NULL) {
1026                 close(pub_state->fd);
1027                 goto failed;
1028         }
1029         tevent_fd_set_auto_close(fde);
1030
1031         priv_state = talloc(winbind_event_context(),
1032                             struct winbindd_listen_state);
1033         if (!priv_state) {
1034                 goto failed;
1035         }
1036
1037         priv_state->privileged = true;
1038         priv_state->fd = create_pipe_sock(
1039                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1040         if (priv_state->fd == -1) {
1041                 goto failed;
1042         }
1043         rc = listen(priv_state->fd, 5);
1044         if (rc < 0) {
1045                 goto failed;
1046         }
1047
1048         fde = tevent_add_fd(winbind_event_context(), priv_state,
1049                             priv_state->fd, TEVENT_FD_READ,
1050                             winbindd_listen_fde_handler, priv_state);
1051         if (fde == NULL) {
1052                 close(priv_state->fd);
1053                 goto failed;
1054         }
1055         tevent_fd_set_auto_close(fde);
1056
1057         return true;
1058 failed:
1059         TALLOC_FREE(pub_state);
1060         TALLOC_FREE(priv_state);
1061         return false;
1062 }
1063
1064 bool winbindd_use_idmap_cache(void)
1065 {
1066         return !opt_nocache;
1067 }
1068
1069 bool winbindd_use_cache(void)
1070 {
1071         return !opt_nocache;
1072 }
1073
1074 void winbindd_register_handlers(bool foreground)
1075 {
1076         /* Setup signal handlers */
1077
1078         if (!winbindd_setup_sig_term_handler(true))
1079                 exit(1);
1080         if (!winbindd_setup_stdin_handler(true, foreground))
1081                 exit(1);
1082         if (!winbindd_setup_sig_hup_handler(NULL))
1083                 exit(1);
1084         if (!winbindd_setup_sig_chld_handler())
1085                 exit(1);
1086         if (!winbindd_setup_sig_usr2_handler())
1087                 exit(1);
1088
1089         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1090
1091         /*
1092          * Ensure all cache and idmap caches are consistent
1093          * and initialized before we startup.
1094          */
1095         if (!winbindd_cache_validate_and_initialize()) {
1096                 exit(1);
1097         }
1098
1099         /* get broadcast messages */
1100
1101         if (!serverid_register(procid_self(),
1102                                FLAG_MSG_GENERAL |
1103                                FLAG_MSG_WINBIND |
1104                                FLAG_MSG_DBWRAP)) {
1105                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1106                 exit(1);
1107         }
1108
1109         /* React on 'smbcontrol winbindd reload-config' in the same way
1110            as to SIGHUP signal */
1111         messaging_register(winbind_messaging_context(), NULL,
1112                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1113         messaging_register(winbind_messaging_context(), NULL,
1114                            MSG_SHUTDOWN, msg_shutdown);
1115
1116         /* Handle online/offline messages. */
1117         messaging_register(winbind_messaging_context(), NULL,
1118                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1119         messaging_register(winbind_messaging_context(), NULL,
1120                            MSG_WINBIND_ONLINE, winbind_msg_online);
1121         messaging_register(winbind_messaging_context(), NULL,
1122                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1123
1124         messaging_register(winbind_messaging_context(), NULL,
1125                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1126
1127         messaging_register(winbind_messaging_context(), NULL,
1128                            MSG_WINBIND_VALIDATE_CACHE,
1129                            winbind_msg_validate_cache);
1130
1131         messaging_register(winbind_messaging_context(), NULL,
1132                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1133                            winbind_msg_dump_domain_list);
1134
1135         messaging_register(winbind_messaging_context(), NULL,
1136                            MSG_WINBIND_IP_DROPPED,
1137                            winbind_msg_ip_dropped_parent);
1138
1139         /* Register handler for MSG_DEBUG. */
1140         messaging_register(winbind_messaging_context(), NULL,
1141                            MSG_DEBUG,
1142                            winbind_msg_debug);
1143
1144         netsamlogon_cache_init(); /* Non-critical */
1145
1146         /* clear the cached list of trusted domains */
1147
1148         wcache_tdc_clear();
1149
1150         if (!init_domain_list()) {
1151                 DEBUG(0,("unable to initialize domain list\n"));
1152                 exit(1);
1153         }
1154
1155         init_idmap_child();
1156         init_locator_child();
1157
1158         smb_nscd_flush_user_cache();
1159         smb_nscd_flush_group_cache();
1160
1161         if (lp_allow_trusted_domains()) {
1162                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1163                               rescan_trusted_domains, NULL) == NULL) {
1164                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1165                         exit(1);
1166                 }
1167         }
1168
1169 }
1170
1171 struct winbindd_addrchanged_state {
1172         struct addrchange_context *ctx;
1173         struct tevent_context *ev;
1174         struct messaging_context *msg_ctx;
1175 };
1176
1177 static void winbindd_addr_changed(struct tevent_req *req);
1178
1179 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1180                                      struct tevent_context *ev,
1181                                      struct messaging_context *msg_ctx)
1182 {
1183         struct winbindd_addrchanged_state *state;
1184         struct tevent_req *req;
1185         NTSTATUS status;
1186
1187         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1188         if (state == NULL) {
1189                 DEBUG(10, ("talloc failed\n"));
1190                 return;
1191         }
1192         state->ev = ev;
1193         state->msg_ctx = msg_ctx;
1194
1195         status = addrchange_context_create(state, &state->ctx);
1196         if (!NT_STATUS_IS_OK(status)) {
1197                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1198                            nt_errstr(status)));
1199                 TALLOC_FREE(state);
1200                 return;
1201         }
1202         req = addrchange_send(state, ev, state->ctx);
1203         if (req == NULL) {
1204                 DEBUG(0, ("addrchange_send failed\n"));
1205                 TALLOC_FREE(state);
1206                 return;
1207         }
1208         tevent_req_set_callback(req, winbindd_addr_changed, state);
1209 }
1210
1211 static void winbindd_addr_changed(struct tevent_req *req)
1212 {
1213         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1214                 req, struct winbindd_addrchanged_state);
1215         enum addrchange_type type;
1216         struct sockaddr_storage addr;
1217         NTSTATUS status;
1218
1219         status = addrchange_recv(req, &type, &addr);
1220         TALLOC_FREE(req);
1221         if (!NT_STATUS_IS_OK(status)) {
1222                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1223                            nt_errstr(status)));
1224                 TALLOC_FREE(state);
1225                 return;
1226         }
1227         if (type == ADDRCHANGE_DEL) {
1228                 char addrstr[INET6_ADDRSTRLEN];
1229                 DATA_BLOB blob;
1230
1231                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1232
1233                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1234                           addrstr));
1235
1236                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1237
1238                 status = messaging_send(state->msg_ctx,
1239                                         messaging_server_id(state->msg_ctx),
1240                                         MSG_WINBIND_IP_DROPPED, &blob);
1241                 if (!NT_STATUS_IS_OK(status)) {
1242                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1243                                    nt_errstr(status)));
1244                 }
1245         }
1246         req = addrchange_send(state, state->ev, state->ctx);
1247         if (req == NULL) {
1248                 DEBUG(0, ("addrchange_send failed\n"));
1249                 TALLOC_FREE(state);
1250                 return;
1251         }
1252         tevent_req_set_callback(req, winbindd_addr_changed, state);
1253 }
1254
1255 /* Main function */
1256
1257 int main(int argc, char **argv, char **envp)
1258 {
1259         static bool is_daemon = False;
1260         static bool Fork = True;
1261         static bool log_stdout = False;
1262         static bool no_process_group = False;
1263         enum {
1264                 OPT_DAEMON = 1000,
1265                 OPT_FORK,
1266                 OPT_NO_PROCESS_GROUP,
1267                 OPT_LOG_STDOUT
1268         };
1269         struct poptOption long_options[] = {
1270                 POPT_AUTOHELP
1271                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1272                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1273                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1274                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1275                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1276                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1277                 POPT_COMMON_SAMBA
1278                 POPT_TABLEEND
1279         };
1280         poptContext pc;
1281         int opt;
1282         TALLOC_CTX *frame;
1283         NTSTATUS status;
1284
1285         /*
1286          * Do this before any other talloc operation
1287          */
1288         talloc_enable_null_tracking();
1289         frame = talloc_stackframe();
1290
1291         setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1292
1293         /* glibc (?) likes to print "User defined signal 1" and exit if a
1294            SIGUSR[12] is received before a handler is installed */
1295
1296         CatchSignal(SIGUSR1, SIG_IGN);
1297         CatchSignal(SIGUSR2, SIG_IGN);
1298
1299         fault_setup();
1300         dump_core_setup("winbindd", lp_logfile());
1301
1302         load_case_tables();
1303
1304         /* Initialise for running in non-root mode */
1305
1306         sec_init();
1307
1308         set_remote_machine_name("winbindd", False);
1309
1310         /* Set environment variable so we don't recursively call ourselves.
1311            This may also be useful interactively. */
1312
1313         if ( !winbind_off() ) {
1314                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1315                 exit(1);
1316         }
1317
1318         /* Initialise samba/rpc client stuff */
1319
1320         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1321
1322         while ((opt = poptGetNextOpt(pc)) != -1) {
1323                 switch (opt) {
1324                         /* Don't become a daemon */
1325                 case OPT_DAEMON:
1326                         is_daemon = True;
1327                         break;
1328                 case 'i':
1329                         interactive = True;
1330                         log_stdout = True;
1331                         Fork = False;
1332                         break;
1333                 case OPT_FORK:
1334                         Fork = false;
1335                         break;
1336                 case OPT_NO_PROCESS_GROUP:
1337                         no_process_group = true;
1338                         break;
1339                 case OPT_LOG_STDOUT:
1340                         log_stdout = true;
1341                         break;
1342                 case 'n':
1343                         opt_nocache = true;
1344                         break;
1345                 default:
1346                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1347                                   poptBadOption(pc, 0), poptStrerror(opt));
1348                         poptPrintUsage(pc, stderr, 0);
1349                         exit(1);
1350                 }
1351         }
1352
1353         dump_core_setup("winbindd", lp_logfile());
1354         if (is_daemon && interactive) {
1355                 d_fprintf(stderr,"\nERROR: "
1356                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1357                 poptPrintUsage(pc, stderr, 0);
1358                 exit(1);
1359         }
1360
1361         if (log_stdout && Fork) {
1362                 d_fprintf(stderr, "\nERROR: "
1363                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1364                 poptPrintUsage(pc, stderr, 0);
1365                 exit(1);
1366         }
1367
1368         poptFreeContext(pc);
1369
1370         if (!override_logfile) {
1371                 char *lfile = NULL;
1372                 if (asprintf(&lfile,"%s/log.winbindd",
1373                                 get_dyn_LOGFILEBASE()) > 0) {
1374                         lp_set_logfile(lfile);
1375                         SAFE_FREE(lfile);
1376                 }
1377         }
1378
1379         if (log_stdout) {
1380                 setup_logging("winbindd", DEBUG_STDOUT);
1381         } else {
1382                 setup_logging("winbindd", DEBUG_FILE);
1383         }
1384         reopen_logs();
1385
1386         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1387         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1388
1389         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1390                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1391                 exit(1);
1392         }
1393         dump_core_setup("winbindd", lp_logfile());
1394
1395         /* Initialise messaging system */
1396
1397         if (winbind_messaging_context() == NULL) {
1398                 exit(1);
1399         }
1400
1401         if (!reload_services_file(NULL)) {
1402                 DEBUG(0, ("error opening config file\n"));
1403                 exit(1);
1404         }
1405
1406         if (!directory_exist(lp_lockdir())) {
1407                 mkdir(lp_lockdir(), 0755);
1408         }
1409
1410         if (!directory_exist(lp_piddir())) {
1411                 mkdir(lp_piddir(), 0755);
1412         }
1413
1414         /* Setup names. */
1415
1416         if (!init_names())
1417                 exit(1);
1418
1419         load_interfaces();
1420
1421         if (!secrets_init()) {
1422
1423                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1424                 return False;
1425         }
1426
1427         /* Unblock all signals we are interested in as they may have been
1428            blocked by the parent process. */
1429
1430         BlockSignals(False, SIGINT);
1431         BlockSignals(False, SIGQUIT);
1432         BlockSignals(False, SIGTERM);
1433         BlockSignals(False, SIGUSR1);
1434         BlockSignals(False, SIGUSR2);
1435         BlockSignals(False, SIGHUP);
1436         BlockSignals(False, SIGCHLD);
1437
1438         if (!interactive)
1439                 become_daemon(Fork, no_process_group, log_stdout);
1440
1441         pidfile_create("winbindd");
1442
1443 #if HAVE_SETPGID
1444         /*
1445          * If we're interactive we want to set our own process group for
1446          * signal management.
1447          */
1448         if (interactive && !no_process_group)
1449                 setpgid( (pid_t)0, (pid_t)0);
1450 #endif
1451
1452         TimeInit();
1453
1454         /* Don't use winbindd_reinit_after_fork here as
1455          * we're just starting up and haven't created any
1456          * winbindd-specific resources we must free yet. JRA.
1457          */
1458
1459         status = reinit_after_fork(winbind_messaging_context(),
1460                                    winbind_event_context(),
1461                                    false);
1462         if (!NT_STATUS_IS_OK(status)) {
1463                 DEBUG(0,("reinit_after_fork() failed\n"));
1464                 exit(1);
1465         }
1466
1467         /*
1468          * Do not initialize the parent-child-pipe before becoming
1469          * a daemon: this is used to detect a died parent in the child
1470          * process.
1471          */
1472         status = init_before_fork();
1473         if (!NT_STATUS_IS_OK(status)) {
1474                 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status)));
1475                 exit(1);
1476         }
1477
1478         winbindd_register_handlers(!Fork);
1479
1480         status = init_system_session_info();
1481         if (!NT_STATUS_IS_OK(status)) {
1482                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1483                           nt_errstr(status)));
1484                 exit(1);
1485         }
1486
1487         rpc_lsarpc_init(NULL);
1488         rpc_samr_init(NULL);
1489
1490         winbindd_init_addrchange(NULL, winbind_event_context(),
1491                                  winbind_messaging_context());
1492
1493         /* setup listen sockets */
1494
1495         if (!winbindd_setup_listeners()) {
1496                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1497                 exit(1);
1498         }
1499
1500         TALLOC_FREE(frame);
1501         /* Loop waiting for requests */
1502         while (1) {
1503                 frame = talloc_stackframe();
1504
1505                 if (tevent_loop_once(winbind_event_context()) == -1) {
1506                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1507                                   strerror(errno)));
1508                         return 1;
1509                 }
1510
1511                 TALLOC_FREE(frame);
1512         }
1513
1514         return 0;
1515 }