2 Unix SMB/CIFS implementation.
4 Winbind daemon for ntdom nss module
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
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.
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.
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/>.
29 #define DBGC_CLASS DBGC_WINBIND
31 bool opt_nocache = False;
32 static bool interactive = False;
34 extern bool override_logfile;
36 struct event_context *winbind_event_context(void)
38 static struct event_context *ctx;
40 if (!ctx && !(ctx = event_context_init(NULL))) {
41 smb_panic("Could not init winbind event context");
46 struct messaging_context *winbind_messaging_context(void)
48 static struct messaging_context *ctx;
51 ctx = messaging_init(NULL, server_id_self(),
52 winbind_event_context());
55 DEBUG(0, ("Could not init winbind messaging context.\n"));
60 /* Reload configuration */
62 static bool reload_services_file(void)
67 const char *fname = lp_configfile();
69 if (file_exist(fname,NULL) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
70 set_dyn_CONFIGFILE(fname);
75 ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
84 /**************************************************************************** **
86 **************************************************************************** */
88 static void fault_quit(void)
93 static void winbindd_status(void)
95 struct winbindd_cli_state *tmp;
97 DEBUG(0, ("winbindd status:\n"));
99 /* Print client state information */
101 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
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\n",
107 (unsigned long)tmp->pid, tmp->sock));
112 /* Print winbindd status to log file */
114 static void print_winbindd_status(void)
119 /* Flush client cache */
121 static void flush_caches(void)
123 /* We need to invalidate cached user list entries on a SIGHUP
124 otherwise cached access denied errors due to restrict anonymous
125 hang around until the sequence number changes. */
127 if (!wcache_invalidate_cache()) {
128 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
129 if (!winbindd_cache_validate_and_initialize()) {
135 /* Handle the signal by unlinking socket and exiting */
137 static void terminate(bool is_parent)
140 /* When parent goes away we should
141 * remove the socket file. Not so
142 * when children terminate.
146 if (asprintf(&path, "%s/%s",
147 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
155 trustdom_cache_shutdown();
159 TALLOC_CTX *mem_ctx = talloc_init("end_description");
160 char *description = talloc_describe_all(mem_ctx);
162 DEBUG(3, ("tallocs left:\n%s\n", description));
163 talloc_destroy(mem_ctx);
170 static bool do_sigterm;
172 static void termination_handler(int signum)
175 sys_select_signal(signum);
178 static bool do_sigusr2;
180 static void sigusr2_handler(int signum)
183 sys_select_signal(SIGUSR2);
186 static bool do_sighup;
188 static void sighup_handler(int signum)
191 sys_select_signal(SIGHUP);
194 static bool do_sigchld;
196 static void sigchld_handler(int signum)
199 sys_select_signal(SIGCHLD);
202 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
203 static void msg_reload_services(struct messaging_context *msg,
206 struct server_id server_id,
209 /* Flush various caches */
211 reload_services_file();
214 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
215 static void msg_shutdown(struct messaging_context *msg,
218 struct server_id server_id,
225 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
228 struct server_id server_id,
233 struct sigaction act;
234 struct sigaction oldact;
236 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
240 * call the validation code from a child:
241 * so we don't block the main winbindd and the validation
242 * code can safely use fork/waitpid...
245 child_pid = sys_fork();
247 if (child_pid == -1) {
248 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
253 if (child_pid != 0) {
255 DEBUG(5, ("winbind_msg_validate_cache: child created with "
256 "pid %d.\n", child_pid));
262 /* install default SIGCHLD handler: validation code uses fork/waitpid */
264 act.sa_handler = SIG_DFL;
266 /* We *want* SIGALRM to interrupt a system call. */
267 act.sa_flags = SA_RESTART;
269 sigemptyset(&act.sa_mask);
270 sigaddset(&act.sa_mask,SIGCHLD);
271 sigaction(SIGCHLD,&act,&oldact);
273 ret = (uint8)winbindd_validate_cache_nobackup();
274 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
275 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
280 static struct winbindd_dispatch_table {
281 enum winbindd_cmd cmd;
282 void (*fn)(struct winbindd_cli_state *state);
283 const char *winbindd_cmd_name;
284 } dispatch_table[] = {
288 { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
289 { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
291 { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
292 { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
293 { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
295 { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
296 { WINBINDD_GETUSERSIDS, winbindd_getusersids, "GETUSERSIDS" },
297 { WINBINDD_GETUSERDOMGROUPS, winbindd_getuserdomgroups,
298 "GETUSERDOMGROUPS" },
300 /* Group functions */
302 { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
303 { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
304 { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
305 { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
306 { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
307 { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
309 /* PAM auth functions */
311 { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
312 { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
313 { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
314 { WINBINDD_PAM_LOGOFF, winbindd_pam_logoff, "PAM_LOGOFF" },
315 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, winbindd_pam_chng_pswd_auth_crap, "CHNG_PSWD_AUTH_CRAP" },
317 /* Enumeration functions */
319 { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
320 { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
321 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
323 { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
325 /* SID related functions */
327 { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
328 { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
329 { WINBINDD_LOOKUPRIDS, winbindd_lookuprids, "LOOKUPRIDS" },
331 /* Lookup related functions */
333 { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
334 { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
335 { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
336 { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
337 #if 0 /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
338 { WINBINDD_SIDS_TO_XIDS, winbindd_sids_to_unixids, "SIDS_TO_XIDS" },
339 #endif /* end DISABLED */
340 { WINBINDD_ALLOCATE_UID, winbindd_allocate_uid, "ALLOCATE_UID" },
341 { WINBINDD_ALLOCATE_GID, winbindd_allocate_gid, "ALLOCATE_GID" },
342 { WINBINDD_SET_MAPPING, winbindd_set_mapping, "SET_MAPPING" },
343 { WINBINDD_SET_HWM, winbindd_set_hwm, "SET_HWMS" },
347 { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
348 { WINBINDD_PING, winbindd_ping, "PING" },
349 { WINBINDD_INFO, winbindd_info, "INFO" },
350 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
351 "INTERFACE_VERSION" },
352 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
353 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
354 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
355 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
356 "WINBINDD_PRIV_PIPE_DIR" },
357 { WINBINDD_GETDCNAME, winbindd_getdcname, "GETDCNAME" },
358 { WINBINDD_DSGETDCNAME, winbindd_dsgetdcname, "DSGETDCNAME" },
360 /* Credential cache access */
361 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
365 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
366 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
370 { WINBINDD_NUM_CMDS, NULL, "NONE" }
373 static void process_request(struct winbindd_cli_state *state)
375 struct winbindd_dispatch_table *table = dispatch_table;
377 /* Free response data - we may be interrupted and receive another
378 command before being able to send this data off. */
380 SAFE_FREE(state->response.extra_data.data);
382 ZERO_STRUCT(state->response);
384 state->response.result = WINBINDD_PENDING;
385 state->response.length = sizeof(struct winbindd_response);
387 state->mem_ctx = talloc_init("winbind request");
388 if (state->mem_ctx == NULL)
391 /* Remember who asked us. */
392 state->pid = state->request.pid;
394 /* Process command */
396 for (table = dispatch_table; table->fn; table++) {
397 if (state->request.cmd == table->cmd) {
398 DEBUG(10,("process_request: request fn %s\n",
399 table->winbindd_cmd_name ));
406 DEBUG(10,("process_request: unknown request fn number %d\n",
407 (int)state->request.cmd ));
408 request_error(state);
413 * A list of file descriptors being monitored by select in the main processing
414 * loop. fd_event->handler is called whenever the socket is readable/writable.
417 static struct fd_event *fd_events = NULL;
419 void add_fd_event(struct fd_event *ev)
421 struct fd_event *match;
423 /* only add unique fd_event structs */
425 for (match=fd_events; match; match=match->next ) {
427 SMB_ASSERT( match != ev );
434 DLIST_ADD(fd_events, ev);
437 void remove_fd_event(struct fd_event *ev)
439 DLIST_REMOVE(fd_events, ev);
443 * Handler for fd_events to complete a read/write request, set up by
444 * setup_async_read/setup_async_write.
447 static void rw_callback(struct fd_event *event, int flags)
452 todo = event->length - event->done;
454 if (event->flags & EVENT_FD_WRITE) {
455 SMB_ASSERT(flags == EVENT_FD_WRITE);
456 done = sys_write(event->fd,
457 &((char *)event->data)[event->done],
462 event->finished(event->private_data, False);
467 if (event->flags & EVENT_FD_READ) {
468 SMB_ASSERT(flags == EVENT_FD_READ);
469 done = sys_read(event->fd, &((char *)event->data)[event->done],
474 event->finished(event->private_data, False);
481 if (event->done == event->length) {
483 event->finished(event->private_data, True);
488 * Request an async read/write on a fd_event structure. (*finished) is called
489 * when the request is completed or an error had occurred.
492 void setup_async_read(struct fd_event *event, void *data, size_t length,
493 void (*finished)(void *private_data, bool success),
496 SMB_ASSERT(event->flags == 0);
498 event->length = length;
500 event->handler = rw_callback;
501 event->finished = finished;
502 event->private_data = private_data;
503 event->flags = EVENT_FD_READ;
506 void setup_async_write(struct fd_event *event, void *data, size_t length,
507 void (*finished)(void *private_data, bool success),
510 SMB_ASSERT(event->flags == 0);
512 event->length = length;
514 event->handler = rw_callback;
515 event->finished = finished;
516 event->private_data = private_data;
517 event->flags = EVENT_FD_WRITE;
521 * This is the main event loop of winbind requests. It goes through a
522 * state-machine of 3 read/write requests, 4 if you have extra data to send.
524 * An idle winbind client has a read request of 4 bytes outstanding,
525 * finalizing function is request_len_recv, checking the length. request_recv
526 * then processes the packet. The processing function then at some point has
527 * to call request_finished which schedules sending the response.
530 static void request_len_recv(void *private_data, bool success);
531 static void request_recv(void *private_data, bool success);
532 static void request_main_recv(void *private_data, bool success);
533 static void request_finished(struct winbindd_cli_state *state);
534 void request_finished_cont(void *private_data, bool success);
535 static void response_main_sent(void *private_data, bool success);
536 static void response_extra_sent(void *private_data, bool success);
538 static void response_extra_sent(void *private_data, bool success)
540 struct winbindd_cli_state *state =
541 talloc_get_type_abort(private_data, struct winbindd_cli_state);
543 if (state->mem_ctx != NULL) {
544 talloc_destroy(state->mem_ctx);
545 state->mem_ctx = NULL;
549 state->finished = True;
553 SAFE_FREE(state->request.extra_data.data);
554 SAFE_FREE(state->response.extra_data.data);
556 setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
557 request_len_recv, state);
560 static void response_main_sent(void *private_data, bool success)
562 struct winbindd_cli_state *state =
563 talloc_get_type_abort(private_data, struct winbindd_cli_state);
566 state->finished = True;
570 if (state->response.length == sizeof(state->response)) {
571 if (state->mem_ctx != NULL) {
572 talloc_destroy(state->mem_ctx);
573 state->mem_ctx = NULL;
576 setup_async_read(&state->fd_event, &state->request,
577 sizeof(uint32), request_len_recv, state);
581 setup_async_write(&state->fd_event, state->response.extra_data.data,
582 state->response.length - sizeof(state->response),
583 response_extra_sent, state);
586 static void request_finished(struct winbindd_cli_state *state)
588 setup_async_write(&state->fd_event, &state->response,
589 sizeof(state->response), response_main_sent, state);
592 void request_error(struct winbindd_cli_state *state)
594 SMB_ASSERT(state->response.result == WINBINDD_PENDING);
595 state->response.result = WINBINDD_ERROR;
596 request_finished(state);
599 void request_ok(struct winbindd_cli_state *state)
601 SMB_ASSERT(state->response.result == WINBINDD_PENDING);
602 state->response.result = WINBINDD_OK;
603 request_finished(state);
606 void request_finished_cont(void *private_data, bool success)
608 struct winbindd_cli_state *state =
609 talloc_get_type_abort(private_data, struct winbindd_cli_state);
614 request_error(state);
617 static void request_len_recv(void *private_data, bool success)
619 struct winbindd_cli_state *state =
620 talloc_get_type_abort(private_data, struct winbindd_cli_state);
623 state->finished = True;
627 if (*(uint32 *)(&state->request) != sizeof(state->request)) {
628 DEBUG(0,("request_len_recv: Invalid request size received: %d (expected %u)\n",
629 *(uint32_t *)(&state->request), (uint32_t)sizeof(state->request)));
630 state->finished = True;
634 setup_async_read(&state->fd_event, (uint32 *)(&state->request)+1,
635 sizeof(state->request) - sizeof(uint32),
636 request_main_recv, state);
639 static void request_main_recv(void *private_data, bool success)
641 struct winbindd_cli_state *state =
642 talloc_get_type_abort(private_data, struct winbindd_cli_state);
645 state->finished = True;
649 if (state->request.extra_len == 0) {
650 state->request.extra_data.data = NULL;
651 request_recv(state, True);
655 if ((!state->privileged) &&
656 (state->request.extra_len > WINBINDD_MAX_EXTRA_DATA)) {
657 DEBUG(3, ("Got request with %d bytes extra data on "
658 "unprivileged socket\n", (int)state->request.extra_len));
659 state->request.extra_data.data = NULL;
660 state->finished = True;
664 state->request.extra_data.data =
665 SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
667 if (state->request.extra_data.data == NULL) {
668 DEBUG(0, ("malloc failed\n"));
669 state->finished = True;
673 /* Ensure null termination */
674 state->request.extra_data.data[state->request.extra_len] = '\0';
676 setup_async_read(&state->fd_event, state->request.extra_data.data,
677 state->request.extra_len, request_recv, state);
680 static void request_recv(void *private_data, bool success)
682 struct winbindd_cli_state *state =
683 talloc_get_type_abort(private_data, struct winbindd_cli_state);
686 state->finished = True;
690 process_request(state);
693 /* Process a new connection by adding it to the client connection list */
695 static void new_connection(int listen_sock, bool privileged)
697 struct sockaddr_un sunaddr;
698 struct winbindd_cli_state *state;
702 /* Accept connection */
704 len = sizeof(sunaddr);
707 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
708 } while (sock == -1 && errno == EINTR);
713 DEBUG(6,("accepted socket %d\n", sock));
715 /* Create new connection structure */
717 if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
724 state->last_access = time(NULL);
726 state->privileged = privileged;
728 state->fd_event.fd = state->sock;
729 state->fd_event.flags = 0;
730 add_fd_event(&state->fd_event);
732 setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
733 request_len_recv, state);
735 /* Add to connection list */
737 winbindd_add_client(state);
740 /* Remove a client connection from client connection list */
742 static void remove_client(struct winbindd_cli_state *state)
744 /* It's a dead client - hold a funeral */
754 /* Free any getent state */
756 free_getent_state(state->getpwent_state);
757 free_getent_state(state->getgrent_state);
759 /* We may have some extra data that was not freed if the client was
760 killed unexpectedly */
762 SAFE_FREE(state->response.extra_data.data);
764 if (state->mem_ctx != NULL) {
765 talloc_destroy(state->mem_ctx);
766 state->mem_ctx = NULL;
769 remove_fd_event(&state->fd_event);
771 /* Remove from list and free */
773 winbindd_remove_client(state);
777 /* Shutdown client connection which has been idle for the longest time */
779 static bool remove_idle_client(void)
781 struct winbindd_cli_state *state, *remove_state = NULL;
782 time_t last_access = 0;
785 for (state = winbindd_client_list(); state; state = state->next) {
786 if (state->response.result != WINBINDD_PENDING &&
787 !state->getpwent_state && !state->getgrent_state) {
789 if (!last_access || state->last_access < last_access) {
790 last_access = state->last_access;
791 remove_state = state;
797 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
798 nidle, remove_state->sock, (unsigned int)remove_state->pid));
799 remove_client(remove_state);
806 /* check if HUP has been received and reload files */
807 void winbind_check_sighup(void)
811 DEBUG(3, ("got SIGHUP\n"));
814 reload_services_file();
820 /* check if TERM has been received */
821 void winbind_check_sigterm(bool is_parent)
824 terminate(is_parent);
827 /* Process incoming clients on listen_sock. We use a tricky non-blocking,
828 non-forking, non-threaded model which allows us to handle many
829 simultaneous connections while remaining impervious to many denial of
832 static void process_loop(void)
834 struct winbindd_cli_state *state;
837 int maxfd, listen_sock, listen_priv_sock, selret;
838 struct timeval timeout, ev_timeout;
840 /* Open Sockets here to get stuff going ASAP */
841 listen_sock = open_winbindd_socket();
842 listen_priv_sock = open_winbindd_priv_socket();
844 if (listen_sock == -1 || listen_priv_sock == -1) {
845 perror("open_winbind_socket");
849 /* We'll be doing this a lot */
851 /* Handle messages */
853 message_dispatch(winbind_messaging_context());
855 run_events(winbind_event_context(), 0, NULL, NULL);
857 /* refresh the trusted domain cache */
859 rescan_trusted_domains();
861 /* Initialise fd lists for select() */
863 maxfd = MAX(listen_sock, listen_priv_sock);
867 FD_SET(listen_sock, &r_fds);
868 FD_SET(listen_priv_sock, &r_fds);
870 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
873 /* Check for any event timeouts. */
874 if (get_timed_events_timeout(winbind_event_context(), &ev_timeout)) {
875 timeout = timeval_min(&timeout, &ev_timeout);
878 /* Set up client readers and writers */
880 state = winbindd_client_list();
884 struct winbindd_cli_state *next = state->next;
886 /* Dispose of client connection if it is marked as
890 remove_client(state);
895 for (ev = fd_events; ev; ev = ev->next) {
896 if (ev->flags & EVENT_FD_READ) {
897 FD_SET(ev->fd, &r_fds);
898 maxfd = MAX(ev->fd, maxfd);
900 if (ev->flags & EVENT_FD_WRITE) {
901 FD_SET(ev->fd, &w_fds);
902 maxfd = MAX(ev->fd, maxfd);
908 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
915 if (errno == EINTR) {
919 /* Select error, something is badly wrong */
929 struct fd_event *next = ev->next;
931 if (FD_ISSET(ev->fd, &r_fds))
932 flags |= EVENT_FD_READ;
933 if (FD_ISSET(ev->fd, &w_fds))
934 flags |= EVENT_FD_WRITE;
936 ev->handler(ev, flags);
940 if (FD_ISSET(listen_sock, &r_fds)) {
941 while (winbindd_num_clients() >
942 WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
943 DEBUG(5,("winbindd: Exceeding %d client "
944 "connections, removing idle "
946 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
947 if (!remove_idle_client()) {
948 DEBUG(0,("winbindd: Exceeding %d "
949 "client connections, no idle "
950 "connection found\n",
951 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
955 /* new, non-privileged connection */
956 new_connection(listen_sock, False);
959 if (FD_ISSET(listen_priv_sock, &r_fds)) {
960 while (winbindd_num_clients() >
961 WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
962 DEBUG(5,("winbindd: Exceeding %d client "
963 "connections, removing idle "
965 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
966 if (!remove_idle_client()) {
967 DEBUG(0,("winbindd: Exceeding %d "
968 "client connections, no idle "
969 "connection found\n",
970 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
974 /* new, privileged connection */
975 new_connection(listen_priv_sock, True);
981 winbindd_check_cache_size(time(NULL));
984 /* Check signal handling things */
986 winbind_check_sigterm(true);
987 winbind_check_sighup();
990 print_winbindd_status();
999 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
1000 winbind_child_died(pid);
1007 int main(int argc, char **argv, char **envp)
1009 static bool is_daemon = False;
1010 static bool Fork = True;
1011 static bool log_stdout = False;
1012 static bool no_process_group = False;
1016 OPT_NO_PROCESS_GROUP,
1019 struct poptOption long_options[] = {
1021 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1022 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1023 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1024 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1025 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1026 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1032 TALLOC_CTX *frame = talloc_stackframe();
1034 /* glibc (?) likes to print "User defined signal 1" and exit if a
1035 SIGUSR[12] is received before a handler is installed */
1037 CatchSignal(SIGUSR1, SIG_IGN);
1038 CatchSignal(SIGUSR2, SIG_IGN);
1040 fault_setup((void (*)(void *))fault_quit );
1041 dump_core_setup("winbindd");
1045 db_tdb2_setup_messaging(NULL, false);
1047 /* Initialise for running in non-root mode */
1051 set_remote_machine_name("winbindd", False);
1053 /* Set environment variable so we don't recursively call ourselves.
1054 This may also be useful interactively. */
1056 if ( !winbind_off() ) {
1057 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1061 /* Initialise samba/rpc client stuff */
1063 pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1065 while ((opt = poptGetNextOpt(pc)) != -1) {
1067 /* Don't become a daemon */
1079 case OPT_NO_PROCESS_GROUP:
1080 no_process_group = true;
1082 case OPT_LOG_STDOUT:
1089 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1090 poptBadOption(pc, 0), poptStrerror(opt));
1091 poptPrintUsage(pc, stderr, 0);
1096 if (is_daemon && interactive) {
1097 d_fprintf(stderr,"\nERROR: "
1098 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1099 poptPrintUsage(pc, stderr, 0);
1103 if (log_stdout && Fork) {
1104 d_fprintf(stderr, "\nERROR: "
1105 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1106 poptPrintUsage(pc, stderr, 0);
1110 poptFreeContext(pc);
1112 if (!override_logfile) {
1113 char *logfile = NULL;
1114 if (asprintf(&logfile,"%s/log.winbindd",
1115 get_dyn_LOGFILEBASE()) > 0) {
1116 lp_set_logfile(logfile);
1120 setup_logging("winbindd", log_stdout);
1123 DEBUG(0,("winbindd version %s started.\n", SAMBA_VERSION_STRING));
1124 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1126 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1127 DEBUG(0, ("error opening config file\n"));
1131 /* Initialise messaging system */
1133 if (winbind_messaging_context() == NULL) {
1137 db_tdb2_setup_messaging(winbind_messaging_context(), true);
1139 if (!reload_services_file()) {
1140 DEBUG(0, ("error opening config file\n"));
1144 if (!directory_exist(lp_lockdir(), NULL)) {
1145 mkdir(lp_lockdir(), 0755);
1155 if (!secrets_init()) {
1157 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1161 /* Enable netbios namecache */
1165 /* Winbind daemon initialisation */
1167 if ( ! NT_STATUS_IS_OK(idmap_init_cache()) ) {
1168 DEBUG(1, ("Could not init idmap cache!\n"));
1171 /* Unblock all signals we are interested in as they may have been
1172 blocked by the parent process. */
1174 BlockSignals(False, SIGINT);
1175 BlockSignals(False, SIGQUIT);
1176 BlockSignals(False, SIGTERM);
1177 BlockSignals(False, SIGUSR1);
1178 BlockSignals(False, SIGUSR2);
1179 BlockSignals(False, SIGHUP);
1180 BlockSignals(False, SIGCHLD);
1182 /* Setup signal handlers */
1184 CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
1185 CatchSignal(SIGQUIT, termination_handler);
1186 CatchSignal(SIGTERM, termination_handler);
1187 CatchSignal(SIGCHLD, sigchld_handler);
1189 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1191 CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
1192 CatchSignal(SIGHUP, sighup_handler);
1195 become_daemon(Fork, no_process_group);
1197 pidfile_create("winbindd");
1201 * If we're interactive we want to set our own process group for
1202 * signal management.
1204 if (interactive && !no_process_group)
1205 setpgid( (pid_t)0, (pid_t)0);
1210 if (!reinit_after_fork(winbind_messaging_context(), false)) {
1211 DEBUG(0,("reinit_after_fork() failed\n"));
1216 * Ensure all cache and idmap caches are consistent
1217 * and initialized before we startup.
1219 if (!winbindd_cache_validate_and_initialize()) {
1223 /* get broadcast messages */
1224 claim_connection(NULL,"",FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP);
1226 /* React on 'smbcontrol winbindd reload-config' in the same way
1227 as to SIGHUP signal */
1228 messaging_register(winbind_messaging_context(), NULL,
1229 MSG_SMB_CONF_UPDATED, msg_reload_services);
1230 messaging_register(winbind_messaging_context(), NULL,
1231 MSG_SHUTDOWN, msg_shutdown);
1233 /* Handle online/offline messages. */
1234 messaging_register(winbind_messaging_context(), NULL,
1235 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1236 messaging_register(winbind_messaging_context(), NULL,
1237 MSG_WINBIND_ONLINE, winbind_msg_online);
1238 messaging_register(winbind_messaging_context(), NULL,
1239 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1241 messaging_register(winbind_messaging_context(), NULL,
1242 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1244 messaging_register(winbind_messaging_context(), NULL,
1245 MSG_WINBIND_VALIDATE_CACHE,
1246 winbind_msg_validate_cache);
1248 messaging_register(winbind_messaging_context(), NULL,
1249 MSG_WINBIND_DUMP_DOMAIN_LIST,
1250 winbind_msg_dump_domain_list);
1252 /* Register handler for MSG_DEBUG. */
1253 messaging_register(winbind_messaging_context(), NULL,
1257 netsamlogon_cache_init(); /* Non-critical */
1259 /* clear the cached list of trusted domains */
1263 if (!init_domain_list()) {
1264 DEBUG(0,("unable to initialize domain list\n"));
1269 init_locator_child();
1271 smb_nscd_flush_user_cache();
1272 smb_nscd_flush_group_cache();
1274 /* Loop waiting for requests */
1278 frame = talloc_stackframe();