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 #include "../lib/util/pidfile.h"
  40
  41 #undef DBGC_CLASS
  42 #define DBGC_CLASS DBGC_WINBIND
  43
  44 static bool client_is_idle(struct winbindd_cli_state *state);
  45 static void remove_client(struct winbindd_cli_state *state);
  46
  47 static bool opt_nocache = False;
  48 static bool interactive = False;
  49
  50 extern bool override_logfile;
  51
  52 struct messaging_context *winbind_messaging_context(void)
  53 {
  54         struct messaging_context *msg_ctx = server_messaging_context();
  55         if (likely(msg_ctx != NULL)) {
  56                 return msg_ctx;
  57         }
  58         smb_panic("Could not init winbindd's messaging context.\n");
  59         return NULL;
  60 }
  61
  62 /* Reload configuration */
  63
  64 static bool reload_services_file(const char *lfile)
  65 {
  66         bool ret;
  67
  68         if (lp_loaded()) {
  69                 char *fname = lp_configfile(talloc_tos());
  70
  71                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  72                         set_dyn_CONFIGFILE(fname);
  73                 }
  74                 TALLOC_FREE(fname);
  75         }
  76
  77         /* if this is a child, restore the logfile to the special
  78            name - <domain>, idmap, etc. */
  79         if (lfile && *lfile) {
  80                 lp_set_logfile(lfile);
  81         }
  82
  83         reopen_logs();
  84         ret = lp_load_global(get_dyn_CONFIGFILE());
  85
  86         reopen_logs();
  87         load_interfaces();
  88
  89         return(ret);
  90 }
  91
  92
  93 static void winbindd_status(void)
  94 {
  95         struct winbindd_cli_state *tmp;
  96
  97         DEBUG(0, ("winbindd status:\n"));
  98
  99         /* Print client state information */
 100
 101         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
 102
 103         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
 104                 DEBUG(2, ("\tclient list:\n"));
 105                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
 106                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
 107                                      (unsigned long)tmp->pid, tmp->sock,
 108                                      client_is_idle(tmp) ? "idle" : "active"));
 109                 }
 110         }
 111 }
 112
 113 /* Flush client cache */
 114
 115 static void flush_caches(void)
 116 {
 117         /* We need to invalidate cached user list entries on a SIGHUP
 118            otherwise cached access denied errors due to restrict anonymous
 119            hang around until the sequence number changes. */
 120
 121         if (!wcache_invalidate_cache()) {
 122                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 123                 if (!winbindd_cache_validate_and_initialize()) {
 124                         exit(1);
 125                 }
 126         }
 127 }
 128
 129 static void flush_caches_noinit(void)
 130 {
 131         /*
 132          * We need to invalidate cached user list entries on a SIGHUP
 133          * otherwise cached access denied errors due to restrict anonymous
 134          * hang around until the sequence number changes.
 135          * NB
 136          * Skip uninitialized domains when flush cache.
 137          * If domain is not initialized, it means it is never
 138          * used or never become online. look, wcache_invalidate_cache()
 139          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 140          * for unused domains and large traffic for primay domain's DC if there
 141          * are many domains..
 142          */
 143
 144         if (!wcache_invalidate_cache_noinit()) {
 145                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 146                 if (!winbindd_cache_validate_and_initialize()) {
 147                         exit(1);
 148                 }
 149         }
 150 }
 151
 152 /* Handle the signal by unlinking socket and exiting */
 153
 154 static void terminate(bool is_parent)
 155 {
 156         if (is_parent) {
 157                 /* When parent goes away we should
 158                  * remove the socket file. Not so
 159                  * when children terminate.
 160                  */
 161                 char *path = NULL;
 162
 163                 if (asprintf(&path, "%s/%s",
 164                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 165                         unlink(path);
 166                         SAFE_FREE(path);
 167                 }
 168         }
 169
 170         idmap_close();
 171
 172         trustdom_cache_shutdown();
 173
 174         gencache_stabilize();
 175
 176 #if 0
 177         if (interactive) {
 178                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 179                 char *description = talloc_describe_all(mem_ctx);
 180
 181                 DEBUG(3, ("tallocs left:\n%s\n", description));
 182                 talloc_destroy(mem_ctx);
 183         }
 184 #endif
 185
 186         if (is_parent) {
 187                 serverid_deregister(procid_self());
 188                 pidfile_unlink(lp_piddir(), "winbindd");
 189         }
 190
 191         exit(0);
 192 }
 193
 194 static void winbindd_sig_term_handler(struct tevent_context *ev,
 195                                       struct tevent_signal *se,
 196                                       int signum,
 197                                       int count,
 198                                       void *siginfo,
 199                                       void *private_data)
 200 {
 201         bool *is_parent = talloc_get_type_abort(private_data, bool);
 202
 203         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 204                  signum, (int)*is_parent));
 205         terminate(*is_parent);
 206 }
 207
 208 /*
 209   handle stdin becoming readable when we are in --foreground mode
 210  */
 211 static void winbindd_stdin_handler(struct tevent_context *ev,
 212                                struct tevent_fd *fde,
 213                                uint16_t flags,
 214                                void *private_data)
 215 {
 216         char c;
 217         if (read(0, &c, 1) != 1) {
 218                 bool *is_parent = talloc_get_type_abort(private_data, bool);
 219
 220                 /* we have reached EOF on stdin, which means the
 221                    parent has exited. Shutdown the server */
 222                 DEBUG(0,("EOF on stdin (is_parent=%d)\n",
 223                          (int)*is_parent));
 224                 terminate(*is_parent);
 225         }
 226 }
 227
 228 bool winbindd_setup_sig_term_handler(bool parent)
 229 {
 230         struct tevent_signal *se;
 231         bool *is_parent;
 232
 233         is_parent = talloc(winbind_event_context(), bool);
 234         if (!is_parent) {
 235                 return false;
 236         }
 237
 238         *is_parent = parent;
 239
 240         se = tevent_add_signal(winbind_event_context(),
 241                                is_parent,
 242                                SIGTERM, 0,
 243                                winbindd_sig_term_handler,
 244                                is_parent);
 245         if (!se) {
 246                 DEBUG(0,("failed to setup SIGTERM handler"));
 247                 talloc_free(is_parent);
 248                 return false;
 249         }
 250
 251         se = tevent_add_signal(winbind_event_context(),
 252                                is_parent,
 253                                SIGINT, 0,
 254                                winbindd_sig_term_handler,
 255                                is_parent);
 256         if (!se) {
 257                 DEBUG(0,("failed to setup SIGINT handler"));
 258                 talloc_free(is_parent);
 259                 return false;
 260         }
 261
 262         se = tevent_add_signal(winbind_event_context(),
 263                                is_parent,
 264                                SIGQUIT, 0,
 265                                winbindd_sig_term_handler,
 266                                is_parent);
 267         if (!se) {
 268                 DEBUG(0,("failed to setup SIGINT handler"));
 269                 talloc_free(is_parent);
 270                 return false;
 271         }
 272
 273         return true;
 274 }
 275
 276 bool winbindd_setup_stdin_handler(bool parent, bool foreground)
 277 {
 278         bool *is_parent;
 279
 280         if (foreground) {
 281                 is_parent = talloc(winbind_event_context(), bool);
 282                 if (!is_parent) {
 283                         return false;
 284                 }
 285
 286                 *is_parent = parent;
 287
 288                 /* if we are running in the foreground then look for
 289                    EOF on stdin, and exit if it happens. This allows
 290                    us to die if the parent process dies
 291                 */
 292                 tevent_add_fd(winbind_event_context(), is_parent, 0, TEVENT_FD_READ, winbindd_stdin_handler, is_parent);
 293         }
 294
 295         return true;
 296 }
 297
 298 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 299                                      struct tevent_signal *se,
 300                                      int signum,
 301                                      int count,
 302                                      void *siginfo,
 303                                      void *private_data)
 304 {
 305         const char *file = (const char *)private_data;
 306
 307         DEBUG(1,("Reloading services after SIGHUP\n"));
 308         flush_caches_noinit();
 309         reload_services_file(file);
 310 }
 311
 312 bool winbindd_setup_sig_hup_handler(const char *lfile)
 313 {
 314         struct tevent_signal *se;
 315         char *file = NULL;
 316
 317         if (lfile) {
 318                 file = talloc_strdup(winbind_event_context(),
 319                                      lfile);
 320                 if (!file) {
 321                         return false;
 322                 }
 323         }
 324
 325         se = tevent_add_signal(winbind_event_context(),
 326                                winbind_event_context(),
 327                                SIGHUP, 0,
 328                                winbindd_sig_hup_handler,
 329                                file);
 330         if (!se) {
 331                 return false;
 332         }
 333
 334         return true;
 335 }
 336
 337 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 338                                       struct tevent_signal *se,
 339                                       int signum,
 340                                       int count,
 341                                       void *siginfo,
 342                                       void *private_data)
 343 {
 344         pid_t pid;
 345
 346         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 347                 winbind_child_died(pid);
 348         }
 349 }
 350
 351 static bool winbindd_setup_sig_chld_handler(void)
 352 {
 353         struct tevent_signal *se;
 354
 355         se = tevent_add_signal(winbind_event_context(),
 356                                winbind_event_context(),
 357                                SIGCHLD, 0,
 358                                winbindd_sig_chld_handler,
 359                                NULL);
 360         if (!se) {
 361                 return false;
 362         }
 363
 364         return true;
 365 }
 366
 367 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 368                                       struct tevent_signal *se,
 369                                       int signum,
 370                                       int count,
 371                                       void *siginfo,
 372                                       void *private_data)
 373 {
 374         winbindd_status();
 375 }
 376
 377 static bool winbindd_setup_sig_usr2_handler(void)
 378 {
 379         struct tevent_signal *se;
 380
 381         se = tevent_add_signal(winbind_event_context(),
 382                                winbind_event_context(),
 383                                SIGUSR2, 0,
 384                                winbindd_sig_usr2_handler,
 385                                NULL);
 386         if (!se) {
 387                 return false;
 388         }
 389
 390         return true;
 391 }
 392
 393 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 394 static void msg_reload_services(struct messaging_context *msg,
 395                                 void *private_data,
 396                                 uint32_t msg_type,
 397                                 struct server_id server_id,
 398                                 DATA_BLOB *data)
 399 {
 400         /* Flush various caches */
 401         flush_caches();
 402         reload_services_file((const char *) private_data);
 403 }
 404
 405 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 406 static void msg_shutdown(struct messaging_context *msg,
 407                          void *private_data,
 408                          uint32_t msg_type,
 409                          struct server_id server_id,
 410                          DATA_BLOB *data)
 411 {
 412         /* only the parent waits for this message */
 413         DEBUG(0,("Got shutdown message\n"));
 414         terminate(true);
 415 }
 416
 417
 418 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 419                                        void *private_data,
 420                                        uint32_t msg_type,
 421                                        struct server_id server_id,
 422                                        DATA_BLOB *data)
 423 {
 424         uint8 ret;
 425         pid_t child_pid;
 426         NTSTATUS status;
 427
 428         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 429                    "message.\n"));
 430
 431         /*
 432          * call the validation code from a child:
 433          * so we don't block the main winbindd and the validation
 434          * code can safely use fork/waitpid...
 435          */
 436         child_pid = fork();
 437
 438         if (child_pid == -1) {
 439                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 440                           strerror(errno)));
 441                 return;
 442         }
 443
 444         if (child_pid != 0) {
 445                 /* parent */
 446                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 447                           "pid %d.\n", (int)child_pid));
 448                 return;
 449         }
 450
 451         /* child */
 452
 453         status = winbindd_reinit_after_fork(NULL, NULL);
 454         if (!NT_STATUS_IS_OK(status)) {
 455                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 456                           nt_errstr(status)));
 457                 _exit(0);
 458         }
 459
 460         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 461         CatchSignal(SIGCHLD, SIG_DFL);
 462
 463         ret = (uint8)winbindd_validate_cache_nobackup();
 464         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 465         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 466                            (size_t)1);
 467         _exit(0);
 468 }
 469
 470 static struct winbindd_dispatch_table {
 471         enum winbindd_cmd cmd;
 472         void (*fn)(struct winbindd_cli_state *state);
 473         const char *winbindd_cmd_name;
 474 } dispatch_table[] = {
 475
 476         /* Enumeration functions */
 477
 478         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 479           "LIST_TRUSTDOM" },
 480
 481         /* Miscellaneous */
 482
 483         { WINBINDD_INFO, winbindd_info, "INFO" },
 484         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 485           "INTERFACE_VERSION" },
 486         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 487         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 488         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
 489         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 490         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 491           "WINBINDD_PRIV_PIPE_DIR" },
 492
 493         /* Credential cache access */
 494         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 495         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 496
 497         /* End of list */
 498
 499         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 500 };
 501
 502 struct winbindd_async_dispatch_table {
 503         enum winbindd_cmd cmd;
 504         const char *cmd_name;
 505         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 506                                        struct tevent_context *ev,
 507                                        struct winbindd_cli_state *cli,
 508                                        struct winbindd_request *request);
 509         NTSTATUS (*recv_req)(struct tevent_req *req,
 510                              struct winbindd_response *presp);
 511 };
 512
 513 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 514         { WINBINDD_PING, "PING",
 515           wb_ping_send, wb_ping_recv },
 516         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 517           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 518         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
 519           winbindd_lookupsids_send, winbindd_lookupsids_recv },
 520         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 521           winbindd_lookupname_send, winbindd_lookupname_recv },
 522         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 523           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 524         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 525           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 526         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 527           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 528         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 529           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 530         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
 531           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
 532         { WINBINDD_GETPWSID, "GETPWSID",
 533           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 534         { WINBINDD_GETPWNAM, "GETPWNAM",
 535           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 536         { WINBINDD_GETPWUID, "GETPWUID",
 537           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 538         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 539           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 540         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 541           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 542         { WINBINDD_GETGROUPS, "GETGROUPS",
 543           winbindd_getgroups_send, winbindd_getgroups_recv },
 544         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 545           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 546         { WINBINDD_GETGRGID, "GETGRGID",
 547           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 548         { WINBINDD_GETGRNAM, "GETGRNAM",
 549           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 550         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 551           winbindd_getusersids_send, winbindd_getusersids_recv },
 552         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 553           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 554         { WINBINDD_SETPWENT, "SETPWENT",
 555           winbindd_setpwent_send, winbindd_setpwent_recv },
 556         { WINBINDD_GETPWENT, "GETPWENT",
 557           winbindd_getpwent_send, winbindd_getpwent_recv },
 558         { WINBINDD_ENDPWENT, "ENDPWENT",
 559           winbindd_endpwent_send, winbindd_endpwent_recv },
 560         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 561           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 562         { WINBINDD_GETDCNAME, "GETDCNAME",
 563           winbindd_getdcname_send, winbindd_getdcname_recv },
 564         { WINBINDD_SETGRENT, "SETGRENT",
 565           winbindd_setgrent_send, winbindd_setgrent_recv },
 566         { WINBINDD_GETGRENT, "GETGRENT",
 567           winbindd_getgrent_send, winbindd_getgrent_recv },
 568         { WINBINDD_ENDGRENT, "ENDGRENT",
 569           winbindd_endgrent_send, winbindd_endgrent_recv },
 570         { WINBINDD_LIST_USERS, "LIST_USERS",
 571           winbindd_list_users_send, winbindd_list_users_recv },
 572         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 573           winbindd_list_groups_send, winbindd_list_groups_recv },
 574         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 575           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 576         { WINBINDD_PING_DC, "PING_DC",
 577           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 578         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 579           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 580         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 581           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 582         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 583           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 584         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 585           winbindd_pam_chng_pswd_auth_crap_send,
 586           winbindd_pam_chng_pswd_auth_crap_recv },
 587         { WINBINDD_WINS_BYIP, "WINS_BYIP",
 588           winbindd_wins_byip_send, winbindd_wins_byip_recv },
 589         { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
 590           winbindd_wins_byname_send, winbindd_wins_byname_recv },
 591
 592         { 0, NULL, NULL, NULL }
 593 };
 594
 595 static struct winbindd_async_dispatch_table async_priv_table[] = {
 596         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 597           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 598         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 599           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 600         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 601           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 602         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 603           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 604
 605         { 0, NULL, NULL, NULL }
 606 };
 607
 608 static void wb_request_done(struct tevent_req *req);
 609
 610 static void process_request(struct winbindd_cli_state *state)
 611 {
 612         struct winbindd_dispatch_table *table = dispatch_table;
 613         struct winbindd_async_dispatch_table *atable;
 614
 615         state->mem_ctx = talloc_named(state, 0, "winbind request");
 616         if (state->mem_ctx == NULL)
 617                 return;
 618
 619         /* Remember who asked us. */
 620         state->pid = state->request->pid;
 621
 622         state->cmd_name = "unknown request";
 623         state->recv_fn = NULL;
 624
 625         /* Process command */
 626
 627         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 628                 if (state->request->cmd == atable->cmd) {
 629                         break;
 630                 }
 631         }
 632
 633         if ((atable->send_req == NULL) && state->privileged) {
 634                 for (atable = async_priv_table; atable->send_req;
 635                      atable += 1) {
 636                         if (state->request->cmd == atable->cmd) {
 637                                 break;
 638                         }
 639                 }
 640         }
 641
 642         if (atable->send_req != NULL) {
 643                 struct tevent_req *req;
 644
 645                 state->cmd_name = atable->cmd_name;
 646                 state->recv_fn = atable->recv_req;
 647
 648                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
 649                            (int)state->pid, state->cmd_name));
 650
 651                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 652                                        state, state->request);
 653                 if (req == NULL) {
 654                         DEBUG(0, ("process_request: atable->send failed for "
 655                                   "%s\n", atable->cmd_name));
 656                         request_error(state);
 657                         return;
 658                 }
 659                 tevent_req_set_callback(req, wb_request_done, state);
 660                 return;
 661         }
 662
 663         state->response = talloc_zero(state->mem_ctx,
 664                                       struct winbindd_response);
 665         if (state->response == NULL) {
 666                 DEBUG(10, ("talloc failed\n"));
 667                 remove_client(state);
 668                 return;
 669         }
 670         state->response->result = WINBINDD_PENDING;
 671         state->response->length = sizeof(struct winbindd_response);
 672
 673         for (table = dispatch_table; table->fn; table++) {
 674                 if (state->request->cmd == table->cmd) {
 675                         DEBUG(10,("process_request: request fn %s\n",
 676                                   table->winbindd_cmd_name ));
 677                         state->cmd_name = table->winbindd_cmd_name;
 678                         table->fn(state);
 679                         break;
 680                 }
 681         }
 682
 683         if (!table->fn) {
 684                 DEBUG(10,("process_request: unknown request fn number %d\n",
 685                           (int)state->request->cmd ));
 686                 request_error(state);
 687         }
 688 }
 689
 690 static void wb_request_done(struct tevent_req *req)
 691 {
 692         struct winbindd_cli_state *state = tevent_req_callback_data(
 693                 req, struct winbindd_cli_state);
 694         NTSTATUS status;
 695
 696         state->response = talloc_zero(state->mem_ctx,
 697                                       struct winbindd_response);
 698         if (state->response == NULL) {
 699                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 700                           (int)state->pid, state->cmd_name));
 701                 remove_client(state);
 702                 return;
 703         }
 704         state->response->result = WINBINDD_PENDING;
 705         state->response->length = sizeof(struct winbindd_response);
 706
 707         status = state->recv_fn(req, state->response);
 708         TALLOC_FREE(req);
 709
 710         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 711                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 712
 713         if (!NT_STATUS_IS_OK(status)) {
 714                 request_error(state);
 715                 return;
 716         }
 717         request_ok(state);
 718 }
 719
 720 /*
 721  * This is the main event loop of winbind requests. It goes through a
 722  * state-machine of 3 read/write requests, 4 if you have extra data to send.
 723  *
 724  * An idle winbind client has a read request of 4 bytes outstanding,
 725  * finalizing function is request_len_recv, checking the length. request_recv
 726  * then processes the packet. The processing function then at some point has
 727  * to call request_finished which schedules sending the response.
 728  */
 729
 730 static void request_finished(struct winbindd_cli_state *state);
 731
 732 static void winbind_client_request_read(struct tevent_req *req);
 733 static void winbind_client_response_written(struct tevent_req *req);
 734
 735 static void request_finished(struct winbindd_cli_state *state)
 736 {
 737         struct tevent_req *req;
 738
 739         TALLOC_FREE(state->request);
 740
 741         req = wb_resp_write_send(state, winbind_event_context(),
 742                                  state->out_queue, state->sock,
 743                                  state->response);
 744         if (req == NULL) {
 745                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
 746                           (int)state->pid, state->cmd_name));
 747                 remove_client(state);
 748                 return;
 749         }
 750         tevent_req_set_callback(req, winbind_client_response_written, state);
 751 }
 752
 753 static void winbind_client_response_written(struct tevent_req *req)
 754 {
 755         struct winbindd_cli_state *state = tevent_req_callback_data(
 756                 req, struct winbindd_cli_state);
 757         ssize_t ret;
 758         int err;
 759
 760         ret = wb_resp_write_recv(req, &err);
 761         TALLOC_FREE(req);
 762         if (ret == -1) {
 763                 close(state->sock);
 764                 state->sock = -1;
 765                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
 766                           (int)state->pid, state->cmd_name, strerror(err)));
 767                 remove_client(state);
 768                 return;
 769         }
 770
 771         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
 772                   "to client\n", (int)state->pid, state->cmd_name));
 773
 774         TALLOC_FREE(state->mem_ctx);
 775         state->response = NULL;
 776         state->cmd_name = "no request";
 777         state->recv_fn = NULL;
 778
 779         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 780                                WINBINDD_MAX_EXTRA_DATA);
 781         if (req == NULL) {
 782                 remove_client(state);
 783                 return;
 784         }
 785         tevent_req_set_callback(req, winbind_client_request_read, state);
 786 }
 787
 788 void request_error(struct winbindd_cli_state *state)
 789 {
 790         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 791         state->response->result = WINBINDD_ERROR;
 792         request_finished(state);
 793 }
 794
 795 void request_ok(struct winbindd_cli_state *state)
 796 {
 797         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 798         state->response->result = WINBINDD_OK;
 799         request_finished(state);
 800 }
 801
 802 /* Process a new connection by adding it to the client connection list */
 803
 804 static void new_connection(int listen_sock, bool privileged)
 805 {
 806         struct sockaddr_un sunaddr;
 807         struct winbindd_cli_state *state;
 808         struct tevent_req *req;
 809         socklen_t len;
 810         int sock;
 811
 812         /* Accept connection */
 813
 814         len = sizeof(sunaddr);
 815
 816         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 817
 818         if (sock == -1) {
 819                 if (errno != EINTR) {
 820                         DEBUG(0, ("Faild to accept socket - %s\n",
 821                                   strerror(errno)));
 822                 }
 823                 return;
 824         }
 825
 826         DEBUG(6,("accepted socket %d\n", sock));
 827
 828         /* Create new connection structure */
 829
 830         if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
 831                 close(sock);
 832                 return;
 833         }
 834
 835         state->sock = sock;
 836
 837         state->out_queue = tevent_queue_create(state, "winbind client reply");
 838         if (state->out_queue == NULL) {
 839                 close(sock);
 840                 TALLOC_FREE(state);
 841                 return;
 842         }
 843
 844         state->last_access = time(NULL);
 845
 846         state->privileged = privileged;
 847
 848         req = wb_req_read_send(state, winbind_event_context(), state->sock,
 849                                WINBINDD_MAX_EXTRA_DATA);
 850         if (req == NULL) {
 851                 TALLOC_FREE(state);
 852                 close(sock);
 853                 return;
 854         }
 855         tevent_req_set_callback(req, winbind_client_request_read, state);
 856
 857         /* Add to connection list */
 858
 859         winbindd_add_client(state);
 860 }
 861
 862 static void winbind_client_request_read(struct tevent_req *req)
 863 {
 864         struct winbindd_cli_state *state = tevent_req_callback_data(
 865                 req, struct winbindd_cli_state);
 866         ssize_t ret;
 867         int err;
 868
 869         ret = wb_req_read_recv(req, state, &state->request, &err);
 870         TALLOC_FREE(req);
 871         if (ret == -1) {
 872                 if (err == EPIPE) {
 873                         DEBUG(6, ("closing socket %d, client exited\n",
 874                                   state->sock));
 875                 } else {
 876                         DEBUG(2, ("Could not read client request from fd %d: "
 877                                   "%s\n", state->sock, strerror(err)));
 878                 }
 879                 close(state->sock);
 880                 state->sock = -1;
 881                 remove_client(state);
 882                 return;
 883         }
 884         process_request(state);
 885 }
 886
 887 /* Remove a client connection from client connection list */
 888
 889 static void remove_client(struct winbindd_cli_state *state)
 890 {
 891         char c = 0;
 892         int nwritten;
 893
 894         /* It's a dead client - hold a funeral */
 895
 896         if (state == NULL) {
 897                 return;
 898         }
 899
 900         if (state->sock != -1) {
 901                 /* tell client, we are closing ... */
 902                 nwritten = write(state->sock, &c, sizeof(c));
 903                 if (nwritten == -1) {
 904                         DEBUG(2, ("final write to client failed: %s\n",
 905                                 strerror(errno)));
 906                 }
 907
 908                 /* Close socket */
 909
 910                 close(state->sock);
 911                 state->sock = -1;
 912         }
 913
 914         TALLOC_FREE(state->mem_ctx);
 915
 916         /* Remove from list and free */
 917
 918         winbindd_remove_client(state);
 919         TALLOC_FREE(state);
 920 }
 921
 922 /* Is a client idle? */
 923
 924 static bool client_is_idle(struct winbindd_cli_state *state) {
 925   return (state->response == NULL &&
 926           !state->pwent_state && !state->grent_state);
 927 }
 928
 929 /* Shutdown client connection which has been idle for the longest time */
 930
 931 static bool remove_idle_client(void)
 932 {
 933         struct winbindd_cli_state *state, *remove_state = NULL;
 934         time_t last_access = 0;
 935         int nidle = 0;
 936
 937         for (state = winbindd_client_list(); state; state = state->next) {
 938                 if (client_is_idle(state)) {
 939                         nidle++;
 940                         if (!last_access || state->last_access < last_access) {
 941                                 last_access = state->last_access;
 942                                 remove_state = state;
 943                         }
 944                 }
 945         }
 946
 947         if (remove_state) {
 948                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
 949                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
 950                 remove_client(remove_state);
 951                 return True;
 952         }
 953
 954         return False;
 955 }
 956
 957 struct winbindd_listen_state {
 958         bool privileged;
 959         int fd;
 960 };
 961
 962 static void winbindd_listen_fde_handler(struct tevent_context *ev,
 963                                         struct tevent_fd *fde,
 964                                         uint16_t flags,
 965                                         void *private_data)
 966 {
 967         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
 968                                           struct winbindd_listen_state);
 969
 970         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
 971                 DEBUG(5,("winbindd: Exceeding %d client "
 972                          "connections, removing idle "
 973                          "connection.\n", lp_winbind_max_clients()));
 974                 if (!remove_idle_client()) {
 975                         DEBUG(0,("winbindd: Exceeding %d "
 976                                  "client connections, no idle "
 977                                  "connection found\n",
 978                                  lp_winbind_max_clients()));
 979                         break;
 980                 }
 981         }
 982         new_connection(s->fd, s->privileged);
 983 }
 984
 985 /*
 986  * Winbindd socket accessor functions
 987  */
 988
 989 const char *get_winbind_pipe_dir(void)
 990 {
 991         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 992 }
 993
 994 char *get_winbind_priv_pipe_dir(void)
 995 {
 996         return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 997 }
 998
 999 static bool winbindd_setup_listeners(void)
1000 {
1001         struct winbindd_listen_state *pub_state = NULL;
1002         struct winbindd_listen_state *priv_state = NULL;
1003         struct tevent_fd *fde;
1004         int rc;
1005
1006         pub_state = talloc(winbind_event_context(),
1007                            struct winbindd_listen_state);
1008         if (!pub_state) {
1009                 goto failed;
1010         }
1011
1012         pub_state->privileged = false;
1013         pub_state->fd = create_pipe_sock(
1014                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
1015         if (pub_state->fd == -1) {
1016                 goto failed;
1017         }
1018         rc = listen(pub_state->fd, 5);
1019         if (rc < 0) {
1020                 goto failed;
1021         }
1022
1023         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1024                             TEVENT_FD_READ, winbindd_listen_fde_handler,
1025                             pub_state);
1026         if (fde == NULL) {
1027                 close(pub_state->fd);
1028                 goto failed;
1029         }
1030         tevent_fd_set_auto_close(fde);
1031
1032         priv_state = talloc(winbind_event_context(),
1033                             struct winbindd_listen_state);
1034         if (!priv_state) {
1035                 goto failed;
1036         }
1037
1038         priv_state->privileged = true;
1039         priv_state->fd = create_pipe_sock(
1040                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1041         if (priv_state->fd == -1) {
1042                 goto failed;
1043         }
1044         rc = listen(priv_state->fd, 5);
1045         if (rc < 0) {
1046                 goto failed;
1047         }
1048
1049         fde = tevent_add_fd(winbind_event_context(), priv_state,
1050                             priv_state->fd, TEVENT_FD_READ,
1051                             winbindd_listen_fde_handler, priv_state);
1052         if (fde == NULL) {
1053                 close(priv_state->fd);
1054                 goto failed;
1055         }
1056         tevent_fd_set_auto_close(fde);
1057
1058         return true;
1059 failed:
1060         TALLOC_FREE(pub_state);
1061         TALLOC_FREE(priv_state);
1062         return false;
1063 }
1064
1065 bool winbindd_use_idmap_cache(void)
1066 {
1067         return !opt_nocache;
1068 }
1069
1070 bool winbindd_use_cache(void)
1071 {
1072         return !opt_nocache;
1073 }
1074
1075 void winbindd_register_handlers(bool foreground)
1076 {
1077         /* Setup signal handlers */
1078
1079         if (!winbindd_setup_sig_term_handler(true))
1080                 exit(1);
1081         if (!winbindd_setup_stdin_handler(true, foreground))
1082                 exit(1);
1083         if (!winbindd_setup_sig_hup_handler(NULL))
1084                 exit(1);
1085         if (!winbindd_setup_sig_chld_handler())
1086                 exit(1);
1087         if (!winbindd_setup_sig_usr2_handler())
1088                 exit(1);
1089
1090         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1091
1092         /*
1093          * Ensure all cache and idmap caches are consistent
1094          * and initialized before we startup.
1095          */
1096         if (!winbindd_cache_validate_and_initialize()) {
1097                 exit(1);
1098         }
1099
1100         /* get broadcast messages */
1101
1102         if (!serverid_register(procid_self(),
1103                                FLAG_MSG_GENERAL |
1104                                FLAG_MSG_WINBIND |
1105                                FLAG_MSG_DBWRAP)) {
1106                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1107                 exit(1);
1108         }
1109
1110         /* React on 'smbcontrol winbindd reload-config' in the same way
1111            as to SIGHUP signal */
1112         messaging_register(winbind_messaging_context(), NULL,
1113                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1114         messaging_register(winbind_messaging_context(), NULL,
1115                            MSG_SHUTDOWN, msg_shutdown);
1116
1117         /* Handle online/offline messages. */
1118         messaging_register(winbind_messaging_context(), NULL,
1119                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1120         messaging_register(winbind_messaging_context(), NULL,
1121                            MSG_WINBIND_ONLINE, winbind_msg_online);
1122         messaging_register(winbind_messaging_context(), NULL,
1123                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1124
1125         messaging_register(winbind_messaging_context(), NULL,
1126                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1127
1128         messaging_register(winbind_messaging_context(), NULL,
1129                            MSG_WINBIND_VALIDATE_CACHE,
1130                            winbind_msg_validate_cache);
1131
1132         messaging_register(winbind_messaging_context(), NULL,
1133                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1134                            winbind_msg_dump_domain_list);
1135
1136         messaging_register(winbind_messaging_context(), NULL,
1137                            MSG_WINBIND_IP_DROPPED,
1138                            winbind_msg_ip_dropped_parent);
1139
1140         /* Register handler for MSG_DEBUG. */
1141         messaging_register(winbind_messaging_context(), NULL,
1142                            MSG_DEBUG,
1143                            winbind_msg_debug);
1144
1145         netsamlogon_cache_init(); /* Non-critical */
1146
1147         /* clear the cached list of trusted domains */
1148
1149         wcache_tdc_clear();
1150
1151         if (!init_domain_list()) {
1152                 DEBUG(0,("unable to initialize domain list\n"));
1153                 exit(1);
1154         }
1155
1156         init_idmap_child();
1157         init_locator_child();
1158
1159         smb_nscd_flush_user_cache();
1160         smb_nscd_flush_group_cache();
1161
1162         if (lp_allow_trusted_domains()) {
1163                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1164                               rescan_trusted_domains, NULL) == NULL) {
1165                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1166                         exit(1);
1167                 }
1168         }
1169
1170 }
1171
1172 struct winbindd_addrchanged_state {
1173         struct addrchange_context *ctx;
1174         struct tevent_context *ev;
1175         struct messaging_context *msg_ctx;
1176 };
1177
1178 static void winbindd_addr_changed(struct tevent_req *req);
1179
1180 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1181                                      struct tevent_context *ev,
1182                                      struct messaging_context *msg_ctx)
1183 {
1184         struct winbindd_addrchanged_state *state;
1185         struct tevent_req *req;
1186         NTSTATUS status;
1187
1188         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1189         if (state == NULL) {
1190                 DEBUG(10, ("talloc failed\n"));
1191                 return;
1192         }
1193         state->ev = ev;
1194         state->msg_ctx = msg_ctx;
1195
1196         status = addrchange_context_create(state, &state->ctx);
1197         if (!NT_STATUS_IS_OK(status)) {
1198                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1199                            nt_errstr(status)));
1200                 TALLOC_FREE(state);
1201                 return;
1202         }
1203         req = addrchange_send(state, ev, state->ctx);
1204         if (req == NULL) {
1205                 DEBUG(0, ("addrchange_send failed\n"));
1206                 TALLOC_FREE(state);
1207                 return;
1208         }
1209         tevent_req_set_callback(req, winbindd_addr_changed, state);
1210 }
1211
1212 static void winbindd_addr_changed(struct tevent_req *req)
1213 {
1214         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1215                 req, struct winbindd_addrchanged_state);
1216         enum addrchange_type type;
1217         struct sockaddr_storage addr;
1218         NTSTATUS status;
1219
1220         status = addrchange_recv(req, &type, &addr);
1221         TALLOC_FREE(req);
1222         if (!NT_STATUS_IS_OK(status)) {
1223                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1224                            nt_errstr(status)));
1225                 TALLOC_FREE(state);
1226                 return;
1227         }
1228         if (type == ADDRCHANGE_DEL) {
1229                 char addrstr[INET6_ADDRSTRLEN];
1230                 DATA_BLOB blob;
1231
1232                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1233
1234                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1235                           addrstr));
1236
1237                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1238
1239                 status = messaging_send(state->msg_ctx,
1240                                         messaging_server_id(state->msg_ctx),
1241                                         MSG_WINBIND_IP_DROPPED, &blob);
1242                 if (!NT_STATUS_IS_OK(status)) {
1243                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1244                                    nt_errstr(status)));
1245                 }
1246         }
1247         req = addrchange_send(state, state->ev, state->ctx);
1248         if (req == NULL) {
1249                 DEBUG(0, ("addrchange_send failed\n"));
1250                 TALLOC_FREE(state);
1251                 return;
1252         }
1253         tevent_req_set_callback(req, winbindd_addr_changed, state);
1254 }
1255
1256 /* Main function */
1257
1258 int main(int argc, char **argv, char **envp)
1259 {
1260         static bool is_daemon = False;
1261         static bool Fork = True;
1262         static bool log_stdout = False;
1263         static bool no_process_group = False;
1264         enum {
1265                 OPT_DAEMON = 1000,
1266                 OPT_FORK,
1267                 OPT_NO_PROCESS_GROUP,
1268                 OPT_LOG_STDOUT
1269         };
1270         struct poptOption long_options[] = {
1271                 POPT_AUTOHELP
1272                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1273                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1274                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1275                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1276                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1277                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1278                 POPT_COMMON_SAMBA
1279                 POPT_TABLEEND
1280         };
1281         poptContext pc;
1282         int opt;
1283         TALLOC_CTX *frame;
1284         NTSTATUS status;
1285
1286         /*
1287          * Do this before any other talloc operation
1288          */
1289         talloc_enable_null_tracking();
1290         frame = talloc_stackframe();
1291
1292         setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1293
1294         /* glibc (?) likes to print "User defined signal 1" and exit if a
1295            SIGUSR[12] is received before a handler is installed */
1296
1297         CatchSignal(SIGUSR1, SIG_IGN);
1298         CatchSignal(SIGUSR2, SIG_IGN);
1299
1300         fault_setup();
1301         dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1302
1303         load_case_tables();
1304
1305         /* Initialise for running in non-root mode */
1306
1307         sec_init();
1308
1309         set_remote_machine_name("winbindd", False);
1310
1311         /* Set environment variable so we don't recursively call ourselves.
1312            This may also be useful interactively. */
1313
1314         if ( !winbind_off() ) {
1315                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1316                 exit(1);
1317         }
1318
1319         /* Initialise samba/rpc client stuff */
1320
1321         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1322
1323         while ((opt = poptGetNextOpt(pc)) != -1) {
1324                 switch (opt) {
1325                         /* Don't become a daemon */
1326                 case OPT_DAEMON:
1327                         is_daemon = True;
1328                         break;
1329                 case 'i':
1330                         interactive = True;
1331                         log_stdout = True;
1332                         Fork = False;
1333                         break;
1334                 case OPT_FORK:
1335                         Fork = false;
1336                         break;
1337                 case OPT_NO_PROCESS_GROUP:
1338                         no_process_group = true;
1339                         break;
1340                 case OPT_LOG_STDOUT:
1341                         log_stdout = true;
1342                         break;
1343                 case 'n':
1344                         opt_nocache = true;
1345                         break;
1346                 default:
1347                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1348                                   poptBadOption(pc, 0), poptStrerror(opt));
1349                         poptPrintUsage(pc, stderr, 0);
1350                         exit(1);
1351                 }
1352         }
1353
1354         /* We call dump_core_setup one more time because the command line can
1355          * set the log file or the log-basename and this will influence where
1356          * cores are stored. Without this call get_dyn_LOGFILEBASE will be
1357          * the default value derived from build's prefix. For EOM this value
1358          * is often not related to the path where winbindd is actually run
1359          * in production.
1360          */
1361         dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1362         if (is_daemon && interactive) {
1363                 d_fprintf(stderr,"\nERROR: "
1364                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1365                 poptPrintUsage(pc, stderr, 0);
1366                 exit(1);
1367         }
1368
1369         if (log_stdout && Fork) {
1370                 d_fprintf(stderr, "\nERROR: "
1371                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1372                 poptPrintUsage(pc, stderr, 0);
1373                 exit(1);
1374         }
1375
1376         poptFreeContext(pc);
1377
1378         if (!override_logfile) {
1379                 char *lfile = NULL;
1380                 if (asprintf(&lfile,"%s/log.winbindd",
1381                                 get_dyn_LOGFILEBASE()) > 0) {
1382                         lp_set_logfile(lfile);
1383                         SAFE_FREE(lfile);
1384                 }
1385         }
1386
1387         if (log_stdout) {
1388                 setup_logging("winbindd", DEBUG_STDOUT);
1389         } else {
1390                 setup_logging("winbindd", DEBUG_FILE);
1391         }
1392         reopen_logs();
1393
1394         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1395         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1396
1397         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1398                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1399                 exit(1);
1400         }
1401         /* After parsing the configuration file we setup the core path one more time
1402          * as the log file might have been set in the configuration and cores's
1403          * path is by default basename(lp_logfile()).
1404          */
1405         dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1406
1407         /* Initialise messaging system */
1408
1409         if (winbind_messaging_context() == NULL) {
1410                 exit(1);
1411         }
1412
1413         if (!reload_services_file(NULL)) {
1414                 DEBUG(0, ("error opening config file\n"));
1415                 exit(1);
1416         }
1417
1418         if (!directory_exist(lp_lockdir())) {
1419                 mkdir(lp_lockdir(), 0755);
1420         }
1421
1422         if (!directory_exist(lp_piddir())) {
1423                 mkdir(lp_piddir(), 0755);
1424         }
1425
1426         /* Setup names. */
1427
1428         if (!init_names())
1429                 exit(1);
1430
1431         load_interfaces();
1432
1433         if (!secrets_init()) {
1434
1435                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1436                 return False;
1437         }
1438
1439         /* Unblock all signals we are interested in as they may have been
1440            blocked by the parent process. */
1441
1442         BlockSignals(False, SIGINT);
1443         BlockSignals(False, SIGQUIT);
1444         BlockSignals(False, SIGTERM);
1445         BlockSignals(False, SIGUSR1);
1446         BlockSignals(False, SIGUSR2);
1447         BlockSignals(False, SIGHUP);
1448         BlockSignals(False, SIGCHLD);
1449
1450         if (!interactive)
1451                 become_daemon(Fork, no_process_group, log_stdout);
1452
1453         pidfile_create(lp_piddir(), "winbindd");
1454
1455 #if HAVE_SETPGID
1456         /*
1457          * If we're interactive we want to set our own process group for
1458          * signal management.
1459          */
1460         if (interactive && !no_process_group)
1461                 setpgid( (pid_t)0, (pid_t)0);
1462 #endif
1463
1464         TimeInit();
1465
1466         /* Don't use winbindd_reinit_after_fork here as
1467          * we're just starting up and haven't created any
1468          * winbindd-specific resources we must free yet. JRA.
1469          */
1470
1471         status = reinit_after_fork(winbind_messaging_context(),
1472                                    winbind_event_context(),
1473                                    false);
1474         if (!NT_STATUS_IS_OK(status)) {
1475                 DEBUG(0,("reinit_after_fork() failed\n"));
1476                 exit(1);
1477         }
1478
1479         /*
1480          * Do not initialize the parent-child-pipe before becoming
1481          * a daemon: this is used to detect a died parent in the child
1482          * process.
1483          */
1484         status = init_before_fork();
1485         if (!NT_STATUS_IS_OK(status)) {
1486                 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status)));
1487                 exit(1);
1488         }
1489
1490         winbindd_register_handlers(!Fork);
1491
1492         status = init_system_session_info();
1493         if (!NT_STATUS_IS_OK(status)) {
1494                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1495                           nt_errstr(status)));
1496                 exit(1);
1497         }
1498
1499         rpc_lsarpc_init(NULL);
1500         rpc_samr_init(NULL);
1501
1502         winbindd_init_addrchange(NULL, winbind_event_context(),
1503                                  winbind_messaging_context());
1504
1505         /* setup listen sockets */
1506
1507         if (!winbindd_setup_listeners()) {
1508                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1509                 exit(1);
1510         }
1511
1512         TALLOC_FREE(frame);
1513         /* Loop waiting for requests */
1514         while (1) {
1515                 frame = talloc_stackframe();
1516
1517                 if (tevent_loop_once(winbind_event_context()) == -1) {
1518                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1519                                   strerror(errno)));
1520                         return 1;
1521                 }
1522
1523                 TALLOC_FREE(frame);
1524         }
1525
1526         return 0;
1527 }