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(const char *logfile)
67 const char *fname = lp_configfile();
69 if (file_exist(fname,NULL) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
70 set_dyn_CONFIGFILE(fname);
74 /* if this is a child, restore the logfile to the special
75 name - <domain>, idmap, etc. */
76 if (logfile && *logfile) {
77 lp_set_logfile(logfile);
81 ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
90 /**************************************************************************** **
92 **************************************************************************** */
94 static void fault_quit(void)
99 static void winbindd_status(void)
101 struct winbindd_cli_state *tmp;
103 DEBUG(0, ("winbindd status:\n"));
105 /* Print client state information */
107 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
109 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
110 DEBUG(2, ("\tclient list:\n"));
111 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
112 DEBUGADD(2, ("\t\tpid %lu, sock %d\n",
113 (unsigned long)tmp->pid, tmp->sock));
118 /* Print winbindd status to log file */
120 static void print_winbindd_status(void)
125 /* Flush client cache */
127 static void flush_caches(void)
129 /* We need to invalidate cached user list entries on a SIGHUP
130 otherwise cached access denied errors due to restrict anonymous
131 hang around until the sequence number changes. */
133 if (!wcache_invalidate_cache()) {
134 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
135 if (!winbindd_cache_validate_and_initialize()) {
141 /* Handle the signal by unlinking socket and exiting */
143 static void terminate(bool is_parent)
146 /* When parent goes away we should
147 * remove the socket file. Not so
148 * when children terminate.
152 if (asprintf(&path, "%s/%s",
153 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
161 trustdom_cache_shutdown();
165 TALLOC_CTX *mem_ctx = talloc_init("end_description");
166 char *description = talloc_describe_all(mem_ctx);
168 DEBUG(3, ("tallocs left:\n%s\n", description));
169 talloc_destroy(mem_ctx);
176 static bool do_sigterm;
178 static void termination_handler(int signum)
181 sys_select_signal(signum);
184 static bool do_sigusr2;
186 static void sigusr2_handler(int signum)
189 sys_select_signal(SIGUSR2);
192 static bool do_sighup;
194 static void sighup_handler(int signum)
197 sys_select_signal(SIGHUP);
200 static bool do_sigchld;
202 static void sigchld_handler(int signum)
205 sys_select_signal(SIGCHLD);
208 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
209 static void msg_reload_services(struct messaging_context *msg,
212 struct server_id server_id,
215 /* Flush various caches */
217 reload_services_file((const char *) private_data);
220 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
221 static void msg_shutdown(struct messaging_context *msg,
224 struct server_id server_id,
231 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
234 struct server_id server_id,
239 struct sigaction act;
240 struct sigaction oldact;
242 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
246 * call the validation code from a child:
247 * so we don't block the main winbindd and the validation
248 * code can safely use fork/waitpid...
251 child_pid = sys_fork();
253 if (child_pid == -1) {
254 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
259 if (child_pid != 0) {
261 DEBUG(5, ("winbind_msg_validate_cache: child created with "
262 "pid %d.\n", child_pid));
268 /* install default SIGCHLD handler: validation code uses fork/waitpid */
270 act.sa_handler = SIG_DFL;
272 /* We *want* SIGALRM to interrupt a system call. */
273 act.sa_flags = SA_RESTART;
275 sigemptyset(&act.sa_mask);
276 sigaddset(&act.sa_mask,SIGCHLD);
277 sigaction(SIGCHLD,&act,&oldact);
279 ret = (uint8)winbindd_validate_cache_nobackup();
280 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
281 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
286 static struct winbindd_dispatch_table {
287 enum winbindd_cmd cmd;
288 void (*fn)(struct winbindd_cli_state *state);
289 const char *winbindd_cmd_name;
290 } dispatch_table[] = {
294 { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
295 { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
297 { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
298 { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
299 { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
301 { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
302 { WINBINDD_GETUSERSIDS, winbindd_getusersids, "GETUSERSIDS" },
303 { WINBINDD_GETUSERDOMGROUPS, winbindd_getuserdomgroups,
304 "GETUSERDOMGROUPS" },
306 /* Group functions */
308 { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
309 { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
310 { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
311 { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
312 { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
313 { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
315 /* PAM auth functions */
317 { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
318 { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
319 { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
320 { WINBINDD_PAM_LOGOFF, winbindd_pam_logoff, "PAM_LOGOFF" },
321 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, winbindd_pam_chng_pswd_auth_crap, "CHNG_PSWD_AUTH_CRAP" },
323 /* Enumeration functions */
325 { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
326 { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
327 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
329 { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
331 /* SID related functions */
333 { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
334 { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
335 { WINBINDD_LOOKUPRIDS, winbindd_lookuprids, "LOOKUPRIDS" },
337 /* Lookup related functions */
339 { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
340 { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
341 { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
342 { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
343 { WINBINDD_ALLOCATE_UID, winbindd_allocate_uid, "ALLOCATE_UID" },
344 { WINBINDD_ALLOCATE_GID, winbindd_allocate_gid, "ALLOCATE_GID" },
345 { WINBINDD_SET_MAPPING, winbindd_set_mapping, "SET_MAPPING" },
346 { WINBINDD_SET_HWM, winbindd_set_hwm, "SET_HWMS" },
350 { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
351 { WINBINDD_PING, winbindd_ping, "PING" },
352 { WINBINDD_INFO, winbindd_info, "INFO" },
353 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
354 "INTERFACE_VERSION" },
355 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
356 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
357 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
358 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
359 "WINBINDD_PRIV_PIPE_DIR" },
360 { WINBINDD_GETDCNAME, winbindd_getdcname, "GETDCNAME" },
361 { WINBINDD_DSGETDCNAME, winbindd_dsgetdcname, "DSGETDCNAME" },
363 /* Credential cache access */
364 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
368 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
369 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
373 { WINBINDD_NUM_CMDS, NULL, "NONE" }
376 static void process_request(struct winbindd_cli_state *state)
378 struct winbindd_dispatch_table *table = dispatch_table;
380 /* Free response data - we may be interrupted and receive another
381 command before being able to send this data off. */
383 SAFE_FREE(state->response.extra_data.data);
385 ZERO_STRUCT(state->response);
387 state->response.result = WINBINDD_PENDING;
388 state->response.length = sizeof(struct winbindd_response);
390 state->mem_ctx = talloc_init("winbind request");
391 if (state->mem_ctx == NULL)
394 /* Remember who asked us. */
395 state->pid = state->request.pid;
397 /* Process command */
399 for (table = dispatch_table; table->fn; table++) {
400 if (state->request.cmd == table->cmd) {
401 DEBUG(10,("process_request: request fn %s\n",
402 table->winbindd_cmd_name ));
409 DEBUG(10,("process_request: unknown request fn number %d\n",
410 (int)state->request.cmd ));
411 request_error(state);
416 * A list of file descriptors being monitored by select in the main processing
417 * loop. fd_event->handler is called whenever the socket is readable/writable.
420 static struct fd_event *fd_events = NULL;
422 void add_fd_event(struct fd_event *ev)
424 struct fd_event *match;
426 /* only add unique fd_event structs */
428 for (match=fd_events; match; match=match->next ) {
430 SMB_ASSERT( match != ev );
437 DLIST_ADD(fd_events, ev);
440 void remove_fd_event(struct fd_event *ev)
442 DLIST_REMOVE(fd_events, ev);
446 * Handler for fd_events to complete a read/write request, set up by
447 * setup_async_read/setup_async_write.
450 static void rw_callback(struct fd_event *event, int flags)
455 todo = event->length - event->done;
457 if (event->flags & EVENT_FD_WRITE) {
458 SMB_ASSERT(flags == EVENT_FD_WRITE);
459 done = sys_write(event->fd,
460 &((char *)event->data)[event->done],
465 event->finished(event->private_data, False);
470 if (event->flags & EVENT_FD_READ) {
471 SMB_ASSERT(flags == EVENT_FD_READ);
472 done = sys_read(event->fd, &((char *)event->data)[event->done],
477 event->finished(event->private_data, False);
484 if (event->done == event->length) {
486 event->finished(event->private_data, True);
491 * Request an async read/write on a fd_event structure. (*finished) is called
492 * when the request is completed or an error had occurred.
495 void setup_async_read(struct fd_event *event, void *data, size_t length,
496 void (*finished)(void *private_data, bool success),
499 SMB_ASSERT(event->flags == 0);
501 event->length = length;
503 event->handler = rw_callback;
504 event->finished = finished;
505 event->private_data = private_data;
506 event->flags = EVENT_FD_READ;
509 void setup_async_write(struct fd_event *event, void *data, size_t length,
510 void (*finished)(void *private_data, bool success),
513 SMB_ASSERT(event->flags == 0);
515 event->length = length;
517 event->handler = rw_callback;
518 event->finished = finished;
519 event->private_data = private_data;
520 event->flags = EVENT_FD_WRITE;
524 * This is the main event loop of winbind requests. It goes through a
525 * state-machine of 3 read/write requests, 4 if you have extra data to send.
527 * An idle winbind client has a read request of 4 bytes outstanding,
528 * finalizing function is request_len_recv, checking the length. request_recv
529 * then processes the packet. The processing function then at some point has
530 * to call request_finished which schedules sending the response.
533 static void request_len_recv(void *private_data, bool success);
534 static void request_recv(void *private_data, bool success);
535 static void request_main_recv(void *private_data, bool success);
536 static void request_finished(struct winbindd_cli_state *state);
537 void request_finished_cont(void *private_data, bool success);
538 static void response_main_sent(void *private_data, bool success);
539 static void response_extra_sent(void *private_data, bool success);
541 static void response_extra_sent(void *private_data, bool success)
543 struct winbindd_cli_state *state =
544 talloc_get_type_abort(private_data, struct winbindd_cli_state);
546 if (state->mem_ctx != NULL) {
547 talloc_destroy(state->mem_ctx);
548 state->mem_ctx = NULL;
552 state->finished = True;
556 SAFE_FREE(state->response.extra_data.data);
558 setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
559 request_len_recv, state);
562 static void response_main_sent(void *private_data, bool success)
564 struct winbindd_cli_state *state =
565 talloc_get_type_abort(private_data, struct winbindd_cli_state);
568 state->finished = True;
572 if (state->response.length == sizeof(state->response)) {
573 if (state->mem_ctx != NULL) {
574 talloc_destroy(state->mem_ctx);
575 state->mem_ctx = NULL;
578 setup_async_read(&state->fd_event, &state->request,
579 sizeof(uint32), request_len_recv, state);
583 setup_async_write(&state->fd_event, state->response.extra_data.data,
584 state->response.length - sizeof(state->response),
585 response_extra_sent, state);
588 static void request_finished(struct winbindd_cli_state *state)
590 /* Make sure request.extra_data is freed when finish processing a request */
591 SAFE_FREE(state->request.extra_data.data);
592 setup_async_write(&state->fd_event, &state->response,
593 sizeof(state->response), response_main_sent, state);
596 void request_error(struct winbindd_cli_state *state)
598 SMB_ASSERT(state->response.result == WINBINDD_PENDING);
599 state->response.result = WINBINDD_ERROR;
600 request_finished(state);
603 void request_ok(struct winbindd_cli_state *state)
605 SMB_ASSERT(state->response.result == WINBINDD_PENDING);
606 state->response.result = WINBINDD_OK;
607 request_finished(state);
610 void request_finished_cont(void *private_data, bool success)
612 struct winbindd_cli_state *state =
613 talloc_get_type_abort(private_data, struct winbindd_cli_state);
618 request_error(state);
621 static void request_len_recv(void *private_data, bool success)
623 struct winbindd_cli_state *state =
624 talloc_get_type_abort(private_data, struct winbindd_cli_state);
627 state->finished = True;
631 if (*(uint32 *)(&state->request) != sizeof(state->request)) {
632 DEBUG(0,("request_len_recv: Invalid request size received: %d (expected %u)\n",
633 *(uint32_t *)(&state->request), (uint32_t)sizeof(state->request)));
634 state->finished = True;
638 setup_async_read(&state->fd_event, (uint32 *)(&state->request)+1,
639 sizeof(state->request) - sizeof(uint32),
640 request_main_recv, state);
643 static void request_main_recv(void *private_data, bool success)
645 struct winbindd_cli_state *state =
646 talloc_get_type_abort(private_data, struct winbindd_cli_state);
649 state->finished = True;
653 if (state->request.extra_len == 0) {
654 state->request.extra_data.data = NULL;
655 request_recv(state, True);
659 if ((!state->privileged) &&
660 (state->request.extra_len > WINBINDD_MAX_EXTRA_DATA)) {
661 DEBUG(3, ("Got request with %d bytes extra data on "
662 "unprivileged socket\n", (int)state->request.extra_len));
663 state->request.extra_data.data = NULL;
664 state->finished = True;
668 state->request.extra_data.data =
669 SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
671 if (state->request.extra_data.data == NULL) {
672 DEBUG(0, ("malloc failed\n"));
673 state->finished = True;
677 /* Ensure null termination */
678 state->request.extra_data.data[state->request.extra_len] = '\0';
680 setup_async_read(&state->fd_event, state->request.extra_data.data,
681 state->request.extra_len, request_recv, state);
684 static void request_recv(void *private_data, bool success)
686 struct winbindd_cli_state *state =
687 talloc_get_type_abort(private_data, struct winbindd_cli_state);
690 state->finished = True;
694 process_request(state);
697 /* Process a new connection by adding it to the client connection list */
699 static void new_connection(int listen_sock, bool privileged)
701 struct sockaddr_un sunaddr;
702 struct winbindd_cli_state *state;
706 /* Accept connection */
708 len = sizeof(sunaddr);
711 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
712 } while (sock == -1 && errno == EINTR);
717 DEBUG(6,("accepted socket %d\n", sock));
719 /* Create new connection structure */
721 if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
728 state->last_access = time(NULL);
730 state->privileged = privileged;
732 state->fd_event.fd = state->sock;
733 state->fd_event.flags = 0;
734 add_fd_event(&state->fd_event);
736 setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
737 request_len_recv, state);
739 /* Add to connection list */
741 winbindd_add_client(state);
744 /* Remove a client connection from client connection list */
746 static void remove_client(struct winbindd_cli_state *state)
750 /* It's a dead client - hold a funeral */
756 /* tell client, we are closing ... */
757 write(state->sock, &c, sizeof(c));
763 /* Free any getent state */
765 free_getent_state(state->getpwent_state);
766 free_getent_state(state->getgrent_state);
768 /* We may have some extra data that was not freed if the client was
769 killed unexpectedly */
771 SAFE_FREE(state->response.extra_data.data);
773 if (state->mem_ctx != NULL) {
774 talloc_destroy(state->mem_ctx);
775 state->mem_ctx = NULL;
778 remove_fd_event(&state->fd_event);
780 /* Remove from list and free */
782 winbindd_remove_client(state);
786 /* Shutdown client connection which has been idle for the longest time */
788 static bool remove_idle_client(void)
790 struct winbindd_cli_state *state, *remove_state = NULL;
791 time_t last_access = 0;
794 for (state = winbindd_client_list(); state; state = state->next) {
795 if (state->response.result != WINBINDD_PENDING &&
796 !state->getpwent_state && !state->getgrent_state) {
798 if (!last_access || state->last_access < last_access) {
799 last_access = state->last_access;
800 remove_state = state;
806 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
807 nidle, remove_state->sock, (unsigned int)remove_state->pid));
808 remove_client(remove_state);
815 /* check if HUP has been received and reload files */
816 void winbind_check_sighup(const char *logfile)
820 DEBUG(3, ("got SIGHUP\n"));
823 reload_services_file(logfile);
829 /* check if TERM has been received */
830 void winbind_check_sigterm(bool is_parent)
833 terminate(is_parent);
836 /* Process incoming clients on listen_sock. We use a tricky non-blocking,
837 non-forking, non-threaded model which allows us to handle many
838 simultaneous connections while remaining impervious to many denial of
841 static void process_loop(void)
843 struct winbindd_cli_state *state;
846 int maxfd, listen_sock, listen_priv_sock, selret;
847 struct timeval timeout, ev_timeout;
849 /* Open Sockets here to get stuff going ASAP */
850 listen_sock = open_winbindd_socket();
851 listen_priv_sock = open_winbindd_priv_socket();
853 if (listen_sock == -1 || listen_priv_sock == -1) {
854 perror("open_winbind_socket");
858 /* We'll be doing this a lot */
860 /* Handle messages */
862 message_dispatch(winbind_messaging_context());
864 run_events(winbind_event_context(), 0, NULL, NULL);
866 /* refresh the trusted domain cache */
868 rescan_trusted_domains();
870 /* Initialise fd lists for select() */
872 maxfd = MAX(listen_sock, listen_priv_sock);
876 FD_SET(listen_sock, &r_fds);
877 FD_SET(listen_priv_sock, &r_fds);
879 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
882 /* Check for any event timeouts. */
883 if (get_timed_events_timeout(winbind_event_context(), &ev_timeout)) {
884 timeout = timeval_min(&timeout, &ev_timeout);
887 /* Set up client readers and writers */
889 state = winbindd_client_list();
893 struct winbindd_cli_state *next = state->next;
895 /* Dispose of client connection if it is marked as
899 remove_client(state);
904 for (ev = fd_events; ev; ev = ev->next) {
905 if (ev->flags & EVENT_FD_READ) {
906 FD_SET(ev->fd, &r_fds);
907 maxfd = MAX(ev->fd, maxfd);
909 if (ev->flags & EVENT_FD_WRITE) {
910 FD_SET(ev->fd, &w_fds);
911 maxfd = MAX(ev->fd, maxfd);
917 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
924 if (errno == EINTR) {
928 /* Select error, something is badly wrong */
938 struct fd_event *next = ev->next;
940 if (FD_ISSET(ev->fd, &r_fds))
941 flags |= EVENT_FD_READ;
942 if (FD_ISSET(ev->fd, &w_fds))
943 flags |= EVENT_FD_WRITE;
945 ev->handler(ev, flags);
949 if (FD_ISSET(listen_sock, &r_fds)) {
950 while (winbindd_num_clients() >
951 WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
952 DEBUG(5,("winbindd: Exceeding %d client "
953 "connections, removing idle "
955 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
956 if (!remove_idle_client()) {
957 DEBUG(0,("winbindd: Exceeding %d "
958 "client connections, no idle "
959 "connection found\n",
960 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
964 /* new, non-privileged connection */
965 new_connection(listen_sock, False);
968 if (FD_ISSET(listen_priv_sock, &r_fds)) {
969 while (winbindd_num_clients() >
970 WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
971 DEBUG(5,("winbindd: Exceeding %d client "
972 "connections, removing idle "
974 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
975 if (!remove_idle_client()) {
976 DEBUG(0,("winbindd: Exceeding %d "
977 "client connections, no idle "
978 "connection found\n",
979 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
983 /* new, privileged connection */
984 new_connection(listen_priv_sock, True);
990 winbindd_check_cache_size(time(NULL));
993 /* Check signal handling things */
995 winbind_check_sigterm(true);
996 winbind_check_sighup(NULL);
999 print_winbindd_status();
1008 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
1009 winbind_child_died(pid);
1016 int main(int argc, char **argv, char **envp)
1018 static bool is_daemon = False;
1019 static bool Fork = True;
1020 static bool log_stdout = False;
1021 static bool no_process_group = False;
1025 OPT_NO_PROCESS_GROUP,
1028 struct poptOption long_options[] = {
1030 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1031 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1032 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1033 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1034 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1035 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1041 TALLOC_CTX *frame = talloc_stackframe();
1043 /* glibc (?) likes to print "User defined signal 1" and exit if a
1044 SIGUSR[12] is received before a handler is installed */
1046 CatchSignal(SIGUSR1, SIG_IGN);
1047 CatchSignal(SIGUSR2, SIG_IGN);
1049 fault_setup((void (*)(void *))fault_quit );
1050 dump_core_setup("winbindd");
1054 /* Initialise for running in non-root mode */
1058 set_remote_machine_name("winbindd", False);
1060 /* Set environment variable so we don't recursively call ourselves.
1061 This may also be useful interactively. */
1063 if ( !winbind_off() ) {
1064 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1068 /* Initialise samba/rpc client stuff */
1070 pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1072 while ((opt = poptGetNextOpt(pc)) != -1) {
1074 /* Don't become a daemon */
1086 case OPT_NO_PROCESS_GROUP:
1087 no_process_group = true;
1089 case OPT_LOG_STDOUT:
1096 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1097 poptBadOption(pc, 0), poptStrerror(opt));
1098 poptPrintUsage(pc, stderr, 0);
1103 if (is_daemon && interactive) {
1104 d_fprintf(stderr,"\nERROR: "
1105 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1106 poptPrintUsage(pc, stderr, 0);
1110 if (log_stdout && Fork) {
1111 d_fprintf(stderr, "\nERROR: "
1112 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1113 poptPrintUsage(pc, stderr, 0);
1117 poptFreeContext(pc);
1119 if (!override_logfile) {
1120 char *logfile = NULL;
1121 if (asprintf(&logfile,"%s/log.winbindd",
1122 get_dyn_LOGFILEBASE()) > 0) {
1123 lp_set_logfile(logfile);
1127 setup_logging("winbindd", log_stdout);
1130 DEBUG(0,("winbindd version %s started.\n", SAMBA_VERSION_STRING));
1131 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1133 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1134 DEBUG(0, ("error opening config file\n"));
1138 /* Initialise messaging system */
1140 if (winbind_messaging_context() == NULL) {
1144 if (!reload_services_file(NULL)) {
1145 DEBUG(0, ("error opening config file\n"));
1149 if (!directory_exist(lp_lockdir(), NULL)) {
1150 mkdir(lp_lockdir(), 0755);
1160 if (!secrets_init()) {
1162 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1166 /* Enable netbios namecache */
1170 /* Unblock all signals we are interested in as they may have been
1171 blocked by the parent process. */
1173 BlockSignals(False, SIGINT);
1174 BlockSignals(False, SIGQUIT);
1175 BlockSignals(False, SIGTERM);
1176 BlockSignals(False, SIGUSR1);
1177 BlockSignals(False, SIGUSR2);
1178 BlockSignals(False, SIGHUP);
1179 BlockSignals(False, SIGCHLD);
1181 /* Setup signal handlers */
1183 CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
1184 CatchSignal(SIGQUIT, termination_handler);
1185 CatchSignal(SIGTERM, termination_handler);
1186 CatchSignal(SIGCHLD, sigchld_handler);
1188 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1190 CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
1191 CatchSignal(SIGHUP, sighup_handler);
1194 become_daemon(Fork, no_process_group);
1196 pidfile_create("winbindd");
1200 * If we're interactive we want to set our own process group for
1201 * signal management.
1203 if (interactive && !no_process_group)
1204 setpgid( (pid_t)0, (pid_t)0);
1209 if (!reinit_after_fork(winbind_messaging_context(), false)) {
1210 DEBUG(0,("reinit_after_fork() failed\n"));
1215 * Ensure all cache and idmap caches are consistent
1216 * and initialized before we startup.
1218 if (!winbindd_cache_validate_and_initialize()) {
1222 /* get broadcast messages */
1223 claim_connection(NULL,"",FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP);
1225 /* React on 'smbcontrol winbindd reload-config' in the same way
1226 as to SIGHUP signal */
1227 messaging_register(winbind_messaging_context(), NULL,
1228 MSG_SMB_CONF_UPDATED, msg_reload_services);
1229 messaging_register(winbind_messaging_context(), NULL,
1230 MSG_SHUTDOWN, msg_shutdown);
1232 /* Handle online/offline messages. */
1233 messaging_register(winbind_messaging_context(), NULL,
1234 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1235 messaging_register(winbind_messaging_context(), NULL,
1236 MSG_WINBIND_ONLINE, winbind_msg_online);
1237 messaging_register(winbind_messaging_context(), NULL,
1238 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1240 messaging_register(winbind_messaging_context(), NULL,
1241 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1243 messaging_register(winbind_messaging_context(), NULL,
1244 MSG_WINBIND_VALIDATE_CACHE,
1245 winbind_msg_validate_cache);
1247 messaging_register(winbind_messaging_context(), NULL,
1248 MSG_WINBIND_DUMP_DOMAIN_LIST,
1249 winbind_msg_dump_domain_list);
1251 /* Register handler for MSG_DEBUG. */
1252 messaging_register(winbind_messaging_context(), NULL,
1256 netsamlogon_cache_init(); /* Non-critical */
1258 /* clear the cached list of trusted domains */
1262 if (!init_domain_list()) {
1263 DEBUG(0,("unable to initialize domain list\n"));
1268 init_locator_child();
1270 smb_nscd_flush_user_cache();
1271 smb_nscd_flush_group_cache();
1273 /* Loop waiting for requests */
1277 frame = talloc_stackframe();