s3:winbind: Convert WINBINDD_LIST_USERS to the new API
[Samba/aatanasov.git] / source3 / winbindd / winbindd.c
blob1d3762f5b95b568efb9154c3b0d81e1ae7901c3c
1 /*
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/>.
25 #include "includes.h"
26 #include "winbindd.h"
27 #include "../../nsswitch/libwbclient/wbc_async.h"
29 #undef DBGC_CLASS
30 #define DBGC_CLASS DBGC_WINBIND
32 static void remove_client(struct winbindd_cli_state *state);
34 static bool opt_nocache = False;
35 static bool interactive = False;
37 extern bool override_logfile;
39 struct event_context *winbind_event_context(void)
41 static struct event_context *ctx;
43 if (!ctx && !(ctx = event_context_init(NULL))) {
44 smb_panic("Could not init winbind event context");
46 return ctx;
49 struct messaging_context *winbind_messaging_context(void)
51 static struct messaging_context *ctx;
53 if (ctx == NULL) {
54 ctx = messaging_init(NULL, server_id_self(),
55 winbind_event_context());
57 if (ctx == NULL) {
58 DEBUG(0, ("Could not init winbind messaging context.\n"));
60 return ctx;
63 /* Reload configuration */
65 static bool reload_services_file(const char *lfile)
67 bool ret;
69 if (lp_loaded()) {
70 const char *fname = lp_configfile();
72 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
73 set_dyn_CONFIGFILE(fname);
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);
83 reopen_logs();
84 ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
86 reopen_logs();
87 load_interfaces();
89 return(ret);
93 /**************************************************************************** **
94 Handle a fault..
95 **************************************************************************** */
97 static void fault_quit(void)
99 dump_core();
102 static void winbindd_status(void)
104 struct winbindd_cli_state *tmp;
106 DEBUG(0, ("winbindd status:\n"));
108 /* Print client state information */
110 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
112 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
113 DEBUG(2, ("\tclient list:\n"));
114 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
115 DEBUGADD(2, ("\t\tpid %lu, sock %d\n",
116 (unsigned long)tmp->pid, tmp->sock));
121 /* Print winbindd status to log file */
123 static void print_winbindd_status(void)
125 winbindd_status();
128 /* Flush client cache */
130 static void flush_caches(void)
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. */
136 if (!wcache_invalidate_cache()) {
137 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
138 if (!winbindd_cache_validate_and_initialize()) {
139 exit(1);
144 /* Handle the signal by unlinking socket and exiting */
146 static void terminate(bool is_parent)
148 if (is_parent) {
149 /* When parent goes away we should
150 * remove the socket file. Not so
151 * when children terminate.
153 char *path = NULL;
155 if (asprintf(&path, "%s/%s",
156 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
157 unlink(path);
158 SAFE_FREE(path);
162 idmap_close();
164 trustdom_cache_shutdown();
166 gencache_stabilize();
168 #if 0
169 if (interactive) {
170 TALLOC_CTX *mem_ctx = talloc_init("end_description");
171 char *description = talloc_describe_all(mem_ctx);
173 DEBUG(3, ("tallocs left:\n%s\n", description));
174 talloc_destroy(mem_ctx);
176 #endif
178 if (is_parent) {
179 pidfile_unlink();
182 exit(0);
185 static void winbindd_sig_term_handler(struct tevent_context *ev,
186 struct tevent_signal *se,
187 int signum,
188 int count,
189 void *siginfo,
190 void *private_data)
192 bool *is_parent = talloc_get_type_abort(private_data, bool);
194 DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
195 signum, (int)*is_parent));
196 terminate(*is_parent);
199 bool winbindd_setup_sig_term_handler(bool parent)
201 struct tevent_signal *se;
202 bool *is_parent;
204 is_parent = talloc(winbind_event_context(), bool);
205 if (!is_parent) {
206 return false;
209 *is_parent = parent;
211 se = tevent_add_signal(winbind_event_context(),
212 is_parent,
213 SIGTERM, 0,
214 winbindd_sig_term_handler,
215 is_parent);
216 if (!se) {
217 DEBUG(0,("failed to setup SIGTERM handler"));
218 talloc_free(is_parent);
219 return false;
222 se = tevent_add_signal(winbind_event_context(),
223 is_parent,
224 SIGINT, 0,
225 winbindd_sig_term_handler,
226 is_parent);
227 if (!se) {
228 DEBUG(0,("failed to setup SIGINT handler"));
229 talloc_free(is_parent);
230 return false;
233 se = tevent_add_signal(winbind_event_context(),
234 is_parent,
235 SIGQUIT, 0,
236 winbindd_sig_term_handler,
237 is_parent);
238 if (!se) {
239 DEBUG(0,("failed to setup SIGINT handler"));
240 talloc_free(is_parent);
241 return false;
244 return true;
247 static void winbindd_sig_hup_handler(struct tevent_context *ev,
248 struct tevent_signal *se,
249 int signum,
250 int count,
251 void *siginfo,
252 void *private_data)
254 const char *file = (const char *)private_data;
256 DEBUG(1,("Reloading services after SIGHUP\n"));
257 flush_caches();
258 reload_services_file(file);
261 bool winbindd_setup_sig_hup_handler(const char *lfile)
263 struct tevent_signal *se;
264 char *file = NULL;
266 if (lfile) {
267 file = talloc_strdup(winbind_event_context(),
268 lfile);
269 if (!file) {
270 return false;
274 se = tevent_add_signal(winbind_event_context(),
275 winbind_event_context(),
276 SIGHUP, 0,
277 winbindd_sig_hup_handler,
278 file);
279 if (!se) {
280 return false;
283 return true;
286 static void winbindd_sig_chld_handler(struct tevent_context *ev,
287 struct tevent_signal *se,
288 int signum,
289 int count,
290 void *siginfo,
291 void *private_data)
293 pid_t pid;
295 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
296 winbind_child_died(pid);
300 static bool winbindd_setup_sig_chld_handler(void)
302 struct tevent_signal *se;
304 se = tevent_add_signal(winbind_event_context(),
305 winbind_event_context(),
306 SIGCHLD, 0,
307 winbindd_sig_chld_handler,
308 NULL);
309 if (!se) {
310 return false;
313 return true;
316 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
317 struct tevent_signal *se,
318 int signum,
319 int count,
320 void *siginfo,
321 void *private_data)
323 print_winbindd_status();
326 static bool winbindd_setup_sig_usr2_handler(void)
328 struct tevent_signal *se;
330 se = tevent_add_signal(winbind_event_context(),
331 winbind_event_context(),
332 SIGUSR2, 0,
333 winbindd_sig_usr2_handler,
334 NULL);
335 if (!se) {
336 return false;
339 return true;
342 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
343 static void msg_reload_services(struct messaging_context *msg,
344 void *private_data,
345 uint32_t msg_type,
346 struct server_id server_id,
347 DATA_BLOB *data)
349 /* Flush various caches */
350 flush_caches();
351 reload_services_file((const char *) private_data);
354 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
355 static void msg_shutdown(struct messaging_context *msg,
356 void *private_data,
357 uint32_t msg_type,
358 struct server_id server_id,
359 DATA_BLOB *data)
361 /* only the parent waits for this message */
362 DEBUG(0,("Got shutdown message\n"));
363 terminate(true);
367 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
368 void *private_data,
369 uint32_t msg_type,
370 struct server_id server_id,
371 DATA_BLOB *data)
373 uint8 ret;
374 pid_t child_pid;
375 struct sigaction act;
376 struct sigaction oldact;
378 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
379 "message.\n"));
382 * call the validation code from a child:
383 * so we don't block the main winbindd and the validation
384 * code can safely use fork/waitpid...
386 CatchChild();
387 child_pid = sys_fork();
389 if (child_pid == -1) {
390 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
391 strerror(errno)));
392 return;
395 if (child_pid != 0) {
396 /* parent */
397 DEBUG(5, ("winbind_msg_validate_cache: child created with "
398 "pid %d.\n", (int)child_pid));
399 return;
402 /* child */
404 /* install default SIGCHLD handler: validation code uses fork/waitpid */
405 ZERO_STRUCT(act);
406 act.sa_handler = SIG_DFL;
407 #ifdef SA_RESTART
408 /* We *want* SIGALRM to interrupt a system call. */
409 act.sa_flags = SA_RESTART;
410 #endif
411 sigemptyset(&act.sa_mask);
412 sigaddset(&act.sa_mask,SIGCHLD);
413 sigaction(SIGCHLD,&act,&oldact);
415 ret = (uint8)winbindd_validate_cache_nobackup();
416 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
417 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
418 (size_t)1);
419 _exit(0);
422 static struct winbindd_dispatch_table {
423 enum winbindd_cmd cmd;
424 void (*fn)(struct winbindd_cli_state *state);
425 const char *winbindd_cmd_name;
426 } dispatch_table[] = {
428 /* PAM auth functions */
430 { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
431 { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
432 { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
433 { WINBINDD_PAM_LOGOFF, winbindd_pam_logoff, "PAM_LOGOFF" },
434 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, winbindd_pam_chng_pswd_auth_crap, "CHNG_PSWD_AUTH_CRAP" },
436 /* Enumeration functions */
438 { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
439 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
440 "LIST_TRUSTDOM" },
442 /* Lookup related functions */
444 { WINBINDD_ALLOCATE_UID, winbindd_allocate_uid, "ALLOCATE_UID" },
445 { WINBINDD_ALLOCATE_GID, winbindd_allocate_gid, "ALLOCATE_GID" },
446 { WINBINDD_SET_MAPPING, winbindd_set_mapping, "SET_MAPPING" },
447 { WINBINDD_REMOVE_MAPPING, winbindd_remove_mapping, "REMOVE_MAPPING" },
448 { WINBINDD_SET_HWM, winbindd_set_hwm, "SET_HWMS" },
450 /* Miscellaneous */
452 { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
453 { WINBINDD_INFO, winbindd_info, "INFO" },
454 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
455 "INTERFACE_VERSION" },
456 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
457 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
458 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
459 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
460 "WINBINDD_PRIV_PIPE_DIR" },
462 /* Credential cache access */
463 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
465 /* WINS functions */
467 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
468 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
470 /* End of list */
472 { WINBINDD_NUM_CMDS, NULL, "NONE" }
475 struct winbindd_async_dispatch_table {
476 enum winbindd_cmd cmd;
477 const char *cmd_name;
478 struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
479 struct tevent_context *ev,
480 struct winbindd_cli_state *cli,
481 struct winbindd_request *request);
482 NTSTATUS (*recv_req)(struct tevent_req *req,
483 struct winbindd_response *presp);
486 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
487 { WINBINDD_PING, "PING",
488 wb_ping_send, wb_ping_recv },
489 { WINBINDD_LOOKUPSID, "LOOKUPSID",
490 winbindd_lookupsid_send, winbindd_lookupsid_recv },
491 { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
492 winbindd_lookupname_send, winbindd_lookupname_recv },
493 { WINBINDD_SID_TO_UID, "SID_TO_UID",
494 winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
495 { WINBINDD_SID_TO_GID, "SID_TO_GID",
496 winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
497 { WINBINDD_UID_TO_SID, "UID_TO_SID",
498 winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
499 { WINBINDD_GID_TO_SID, "GID_TO_SID",
500 winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
501 { WINBINDD_GETPWSID, "GETPWSID",
502 winbindd_getpwsid_send, winbindd_getpwsid_recv },
503 { WINBINDD_GETPWNAM, "GETPWNAM",
504 winbindd_getpwnam_send, winbindd_getpwnam_recv },
505 { WINBINDD_GETPWUID, "GETPWUID",
506 winbindd_getpwuid_send, winbindd_getpwuid_recv },
507 { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
508 winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
509 { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
510 winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
511 { WINBINDD_GETGROUPS, "GETGROUPS",
512 winbindd_getgroups_send, winbindd_getgroups_recv },
513 { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
514 winbindd_show_sequence_send, winbindd_show_sequence_recv },
515 { WINBINDD_GETGRGID, "GETGRGID",
516 winbindd_getgrgid_send, winbindd_getgrgid_recv },
517 { WINBINDD_GETGRNAM, "GETGRNAM",
518 winbindd_getgrnam_send, winbindd_getgrnam_recv },
519 { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
520 winbindd_getusersids_send, winbindd_getusersids_recv },
521 { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
522 winbindd_lookuprids_send, winbindd_lookuprids_recv },
523 { WINBINDD_SETPWENT, "SETPWENT",
524 winbindd_setpwent_send, winbindd_setpwent_recv },
525 { WINBINDD_GETPWENT, "GETPWENT",
526 winbindd_getpwent_send, winbindd_getpwent_recv },
527 { WINBINDD_ENDPWENT, "ENDPWENT",
528 winbindd_endpwent_send, winbindd_endpwent_recv },
529 { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
530 winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
531 { WINBINDD_GETDCNAME, "GETDCNAME",
532 winbindd_getdcname_send, winbindd_getdcname_recv },
533 { WINBINDD_SETGRENT, "SETGRENT",
534 winbindd_setgrent_send, winbindd_setgrent_recv },
535 { WINBINDD_GETGRENT, "GETGRENT",
536 winbindd_getgrent_send, winbindd_getgrent_recv },
537 { WINBINDD_ENDGRENT, "ENDGRENT",
538 winbindd_endgrent_send, winbindd_endgrent_recv },
539 { WINBINDD_LIST_USERS, "LIST_USERS",
540 winbindd_list_users_send, winbindd_list_users_recv },
542 { 0, NULL, NULL, NULL }
545 static void wb_request_done(struct tevent_req *req);
547 static void process_request(struct winbindd_cli_state *state)
549 struct winbindd_dispatch_table *table = dispatch_table;
550 struct winbindd_async_dispatch_table *atable;
552 state->mem_ctx = talloc_init("winbind request");
553 if (state->mem_ctx == NULL)
554 return;
556 /* Remember who asked us. */
557 state->pid = state->request->pid;
559 /* Process command */
561 for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
562 if (state->request->cmd == atable->cmd) {
563 break;
567 if (atable->send_req != NULL) {
568 struct tevent_req *req;
570 DEBUG(10, ("process_request: Handling async request %s\n",
571 atable->cmd_name));
573 req = atable->send_req(state->mem_ctx, winbind_event_context(),
574 state, state->request);
575 if (req == NULL) {
576 DEBUG(0, ("process_request: atable->send failed for "
577 "%s\n", atable->cmd_name));
578 request_error(state);
579 return;
581 tevent_req_set_callback(req, wb_request_done, state);
582 state->recv_fn = atable->recv_req;
583 return;
586 state->response = talloc_zero(state->mem_ctx,
587 struct winbindd_response);
588 if (state->response == NULL) {
589 DEBUG(10, ("talloc failed\n"));
590 remove_client(state);
591 return;
593 state->response->result = WINBINDD_PENDING;
594 state->response->length = sizeof(struct winbindd_response);
596 for (table = dispatch_table; table->fn; table++) {
597 if (state->request->cmd == table->cmd) {
598 DEBUG(10,("process_request: request fn %s\n",
599 table->winbindd_cmd_name ));
600 table->fn(state);
601 break;
605 if (!table->fn) {
606 DEBUG(10,("process_request: unknown request fn number %d\n",
607 (int)state->request->cmd ));
608 request_error(state);
612 static void wb_request_done(struct tevent_req *req)
614 struct winbindd_cli_state *state = tevent_req_callback_data(
615 req, struct winbindd_cli_state);
616 NTSTATUS status;
618 state->response = talloc_zero(state, struct winbindd_response);
619 if (state->response == NULL) {
620 remove_client(state);
621 return;
623 state->response->result = WINBINDD_PENDING;
624 state->response->length = sizeof(struct winbindd_response);
626 status = state->recv_fn(req, state->response);
627 TALLOC_FREE(req);
628 if (!NT_STATUS_IS_OK(status)) {
629 DEBUG(10, ("returning %s\n", nt_errstr(status)));
630 request_error(state);
631 return;
633 request_ok(state);
637 * This is the main event loop of winbind requests. It goes through a
638 * state-machine of 3 read/write requests, 4 if you have extra data to send.
640 * An idle winbind client has a read request of 4 bytes outstanding,
641 * finalizing function is request_len_recv, checking the length. request_recv
642 * then processes the packet. The processing function then at some point has
643 * to call request_finished which schedules sending the response.
646 static void request_finished(struct winbindd_cli_state *state);
648 static void winbind_client_request_read(struct tevent_req *req);
649 static void winbind_client_response_written(struct tevent_req *req);
651 static void request_finished(struct winbindd_cli_state *state)
653 struct tevent_req *req;
655 TALLOC_FREE(state->request);
657 req = wb_resp_write_send(state, winbind_event_context(),
658 state->out_queue, state->sock,
659 state->response);
660 if (req == NULL) {
661 remove_client(state);
662 return;
664 tevent_req_set_callback(req, winbind_client_response_written, state);
667 static void winbind_client_response_written(struct tevent_req *req)
669 struct winbindd_cli_state *state = tevent_req_callback_data(
670 req, struct winbindd_cli_state);
671 ssize_t ret;
672 int err;
674 ret = wb_resp_write_recv(req, &err);
675 TALLOC_FREE(req);
676 if (ret == -1) {
677 DEBUG(2, ("Could not write response to client: %s\n",
678 strerror(err)));
679 remove_client(state);
680 return;
683 TALLOC_FREE(state->mem_ctx);
684 state->response = NULL;
686 req = wb_req_read_send(state, winbind_event_context(), state->sock,
687 WINBINDD_MAX_EXTRA_DATA);
688 if (req == NULL) {
689 remove_client(state);
690 return;
692 tevent_req_set_callback(req, winbind_client_request_read, state);
695 void request_error(struct winbindd_cli_state *state)
697 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
698 state->response->result = WINBINDD_ERROR;
699 request_finished(state);
702 void request_ok(struct winbindd_cli_state *state)
704 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
705 state->response->result = WINBINDD_OK;
706 request_finished(state);
709 /* Process a new connection by adding it to the client connection list */
711 static void new_connection(int listen_sock, bool privileged)
713 struct sockaddr_un sunaddr;
714 struct winbindd_cli_state *state;
715 struct tevent_req *req;
716 socklen_t len;
717 int sock;
719 /* Accept connection */
721 len = sizeof(sunaddr);
723 do {
724 sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr,
725 &len);
726 } while (sock == -1 && errno == EINTR);
728 if (sock == -1)
729 return;
731 DEBUG(6,("accepted socket %d\n", sock));
733 /* Create new connection structure */
735 if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
736 close(sock);
737 return;
740 state->sock = sock;
742 state->out_queue = tevent_queue_create(state, "winbind client reply");
743 if (state->out_queue == NULL) {
744 close(sock);
745 TALLOC_FREE(state);
746 return;
749 state->last_access = time(NULL);
751 state->privileged = privileged;
753 req = wb_req_read_send(state, winbind_event_context(), state->sock,
754 WINBINDD_MAX_EXTRA_DATA);
755 if (req == NULL) {
756 TALLOC_FREE(state);
757 close(sock);
758 return;
760 tevent_req_set_callback(req, winbind_client_request_read, state);
762 /* Add to connection list */
764 winbindd_add_client(state);
767 static void winbind_client_request_read(struct tevent_req *req)
769 struct winbindd_cli_state *state = tevent_req_callback_data(
770 req, struct winbindd_cli_state);
771 ssize_t ret;
772 int err;
774 ret = wb_req_read_recv(req, state, &state->request, &err);
775 TALLOC_FREE(req);
776 if (ret == -1) {
777 DEBUG(2, ("Could not read client request: %s\n",
778 strerror(err)));
779 remove_client(state);
780 return;
782 process_request(state);
785 /* Remove a client connection from client connection list */
787 static void remove_client(struct winbindd_cli_state *state)
789 char c = 0;
790 int nwritten;
792 /* It's a dead client - hold a funeral */
794 if (state == NULL) {
795 return;
798 /* tell client, we are closing ... */
799 nwritten = write(state->sock, &c, sizeof(c));
800 if (nwritten == -1) {
802 * ignore EPIPE error here, because the other end might
803 * have already closed the socket.
805 if (errno != EPIPE) {
806 DEBUG(2, ("final write to client failed: %s\n",
807 strerror(errno)));
811 /* Close socket */
813 close(state->sock);
815 /* Free any getent state */
817 free_getent_state(state->getgrent_state);
819 TALLOC_FREE(state->mem_ctx);
821 /* Remove from list and free */
823 winbindd_remove_client(state);
824 TALLOC_FREE(state);
827 /* Shutdown client connection which has been idle for the longest time */
829 static bool remove_idle_client(void)
831 struct winbindd_cli_state *state, *remove_state = NULL;
832 time_t last_access = 0;
833 int nidle = 0;
835 for (state = winbindd_client_list(); state; state = state->next) {
836 if (state->response == NULL &&
837 !state->pwent_state && !state->getgrent_state) {
838 nidle++;
839 if (!last_access || state->last_access < last_access) {
840 last_access = state->last_access;
841 remove_state = state;
846 if (remove_state) {
847 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
848 nidle, remove_state->sock, (unsigned int)remove_state->pid));
849 remove_client(remove_state);
850 return True;
853 return False;
856 struct winbindd_listen_state {
857 bool privileged;
858 int fd;
861 static void winbindd_listen_fde_handler(struct tevent_context *ev,
862 struct tevent_fd *fde,
863 uint16_t flags,
864 void *private_data)
866 struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
867 struct winbindd_listen_state);
869 while (winbindd_num_clients() >
870 WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
871 DEBUG(5,("winbindd: Exceeding %d client "
872 "connections, removing idle "
873 "connection.\n",
874 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
875 if (!remove_idle_client()) {
876 DEBUG(0,("winbindd: Exceeding %d "
877 "client connections, no idle "
878 "connection found\n",
879 WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
880 break;
883 new_connection(s->fd, s->privileged);
886 static bool winbindd_setup_listeners(void)
888 struct winbindd_listen_state *pub_state = NULL;
889 struct winbindd_listen_state *priv_state = NULL;
890 struct tevent_fd *fde;
892 pub_state = talloc(winbind_event_context(),
893 struct winbindd_listen_state);
894 if (!pub_state) {
895 goto failed;
898 pub_state->privileged = false;
899 pub_state->fd = open_winbindd_socket();
900 if (pub_state->fd == -1) {
901 goto failed;
904 fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
905 TEVENT_FD_READ, winbindd_listen_fde_handler,
906 pub_state);
907 if (fde == NULL) {
908 close(pub_state->fd);
909 goto failed;
911 tevent_fd_set_auto_close(fde);
913 priv_state = talloc(winbind_event_context(),
914 struct winbindd_listen_state);
915 if (!priv_state) {
916 goto failed;
919 priv_state->privileged = true;
920 priv_state->fd = open_winbindd_priv_socket();
921 if (priv_state->fd == -1) {
922 goto failed;
925 fde = tevent_add_fd(winbind_event_context(), priv_state,
926 priv_state->fd, TEVENT_FD_READ,
927 winbindd_listen_fde_handler, priv_state);
928 if (fde == NULL) {
929 close(priv_state->fd);
930 goto failed;
932 tevent_fd_set_auto_close(fde);
934 return true;
935 failed:
936 TALLOC_FREE(pub_state);
937 TALLOC_FREE(priv_state);
938 return false;
941 bool winbindd_use_idmap_cache(void)
943 return !opt_nocache;
946 bool winbindd_use_cache(void)
948 return !opt_nocache;
951 /* Main function */
953 int main(int argc, char **argv, char **envp)
955 static bool is_daemon = False;
956 static bool Fork = True;
957 static bool log_stdout = False;
958 static bool no_process_group = False;
959 enum {
960 OPT_DAEMON = 1000,
961 OPT_FORK,
962 OPT_NO_PROCESS_GROUP,
963 OPT_LOG_STDOUT
965 struct poptOption long_options[] = {
966 POPT_AUTOHELP
967 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
968 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
969 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
970 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
971 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
972 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
973 POPT_COMMON_SAMBA
974 POPT_TABLEEND
976 poptContext pc;
977 int opt;
978 TALLOC_CTX *frame = talloc_stackframe();
979 struct tevent_timer *te;
981 /* glibc (?) likes to print "User defined signal 1" and exit if a
982 SIGUSR[12] is received before a handler is installed */
984 CatchSignal(SIGUSR1, SIG_IGN);
985 CatchSignal(SIGUSR2, SIG_IGN);
987 fault_setup((void (*)(void *))fault_quit );
988 dump_core_setup("winbindd");
990 load_case_tables();
992 /* Initialise for running in non-root mode */
994 sec_init();
996 set_remote_machine_name("winbindd", False);
998 /* Set environment variable so we don't recursively call ourselves.
999 This may also be useful interactively. */
1001 if ( !winbind_off() ) {
1002 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1003 exit(1);
1006 /* Initialise samba/rpc client stuff */
1008 pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1010 while ((opt = poptGetNextOpt(pc)) != -1) {
1011 switch (opt) {
1012 /* Don't become a daemon */
1013 case OPT_DAEMON:
1014 is_daemon = True;
1015 break;
1016 case 'i':
1017 interactive = True;
1018 log_stdout = True;
1019 Fork = False;
1020 break;
1021 case OPT_FORK:
1022 Fork = false;
1023 break;
1024 case OPT_NO_PROCESS_GROUP:
1025 no_process_group = true;
1026 break;
1027 case OPT_LOG_STDOUT:
1028 log_stdout = true;
1029 break;
1030 case 'n':
1031 opt_nocache = true;
1032 break;
1033 default:
1034 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1035 poptBadOption(pc, 0), poptStrerror(opt));
1036 poptPrintUsage(pc, stderr, 0);
1037 exit(1);
1041 if (is_daemon && interactive) {
1042 d_fprintf(stderr,"\nERROR: "
1043 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1044 poptPrintUsage(pc, stderr, 0);
1045 exit(1);
1048 if (log_stdout && Fork) {
1049 d_fprintf(stderr, "\nERROR: "
1050 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1051 poptPrintUsage(pc, stderr, 0);
1052 exit(1);
1055 poptFreeContext(pc);
1057 if (!override_logfile) {
1058 char *lfile = NULL;
1059 if (asprintf(&lfile,"%s/log.winbindd",
1060 get_dyn_LOGFILEBASE()) > 0) {
1061 lp_set_logfile(lfile);
1062 SAFE_FREE(lfile);
1065 setup_logging("winbindd", log_stdout);
1066 reopen_logs();
1068 DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1069 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1071 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1072 DEBUG(0, ("error opening config file\n"));
1073 exit(1);
1076 /* Initialise messaging system */
1078 if (winbind_messaging_context() == NULL) {
1079 exit(1);
1082 if (!reload_services_file(NULL)) {
1083 DEBUG(0, ("error opening config file\n"));
1084 exit(1);
1087 if (!directory_exist(lp_lockdir())) {
1088 mkdir(lp_lockdir(), 0755);
1091 /* Setup names. */
1093 if (!init_names())
1094 exit(1);
1096 load_interfaces();
1098 if (!secrets_init()) {
1100 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1101 return False;
1104 /* Enable netbios namecache */
1106 namecache_enable();
1108 /* Unblock all signals we are interested in as they may have been
1109 blocked by the parent process. */
1111 BlockSignals(False, SIGINT);
1112 BlockSignals(False, SIGQUIT);
1113 BlockSignals(False, SIGTERM);
1114 BlockSignals(False, SIGUSR1);
1115 BlockSignals(False, SIGUSR2);
1116 BlockSignals(False, SIGHUP);
1117 BlockSignals(False, SIGCHLD);
1119 if (!interactive)
1120 become_daemon(Fork, no_process_group);
1122 pidfile_create("winbindd");
1124 #if HAVE_SETPGID
1126 * If we're interactive we want to set our own process group for
1127 * signal management.
1129 if (interactive && !no_process_group)
1130 setpgid( (pid_t)0, (pid_t)0);
1131 #endif
1133 TimeInit();
1135 /* Don't use winbindd_reinit_after_fork here as
1136 * we're just starting up and haven't created any
1137 * winbindd-specific resources we must free yet. JRA.
1140 if (!NT_STATUS_IS_OK(reinit_after_fork(winbind_messaging_context(),
1141 winbind_event_context(),
1142 false))) {
1143 DEBUG(0,("reinit_after_fork() failed\n"));
1144 exit(1);
1147 /* Setup signal handlers */
1149 if (!winbindd_setup_sig_term_handler(true))
1150 exit(1);
1151 if (!winbindd_setup_sig_hup_handler(NULL))
1152 exit(1);
1153 if (!winbindd_setup_sig_chld_handler())
1154 exit(1);
1155 if (!winbindd_setup_sig_usr2_handler())
1156 exit(1);
1158 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1161 * Ensure all cache and idmap caches are consistent
1162 * and initialized before we startup.
1164 if (!winbindd_cache_validate_and_initialize()) {
1165 exit(1);
1168 /* get broadcast messages */
1169 claim_connection(NULL,"",FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP);
1171 /* React on 'smbcontrol winbindd reload-config' in the same way
1172 as to SIGHUP signal */
1173 messaging_register(winbind_messaging_context(), NULL,
1174 MSG_SMB_CONF_UPDATED, msg_reload_services);
1175 messaging_register(winbind_messaging_context(), NULL,
1176 MSG_SHUTDOWN, msg_shutdown);
1178 /* Handle online/offline messages. */
1179 messaging_register(winbind_messaging_context(), NULL,
1180 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1181 messaging_register(winbind_messaging_context(), NULL,
1182 MSG_WINBIND_ONLINE, winbind_msg_online);
1183 messaging_register(winbind_messaging_context(), NULL,
1184 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1186 messaging_register(winbind_messaging_context(), NULL,
1187 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1189 messaging_register(winbind_messaging_context(), NULL,
1190 MSG_WINBIND_VALIDATE_CACHE,
1191 winbind_msg_validate_cache);
1193 messaging_register(winbind_messaging_context(), NULL,
1194 MSG_WINBIND_DUMP_DOMAIN_LIST,
1195 winbind_msg_dump_domain_list);
1197 /* Register handler for MSG_DEBUG. */
1198 messaging_register(winbind_messaging_context(), NULL,
1199 MSG_DEBUG,
1200 winbind_msg_debug);
1202 netsamlogon_cache_init(); /* Non-critical */
1204 /* clear the cached list of trusted domains */
1206 wcache_tdc_clear();
1208 if (!init_domain_list()) {
1209 DEBUG(0,("unable to initialize domain list\n"));
1210 exit(1);
1213 init_idmap_child();
1214 init_locator_child();
1216 smb_nscd_flush_user_cache();
1217 smb_nscd_flush_group_cache();
1219 /* setup listen sockets */
1221 if (!winbindd_setup_listeners()) {
1222 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1223 exit(1);
1226 te = tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1227 rescan_trusted_domains, NULL);
1228 if (te == NULL) {
1229 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1230 exit(1);
1233 TALLOC_FREE(frame);
1234 /* Loop waiting for requests */
1235 while (1) {
1236 frame = talloc_stackframe();
1238 if (tevent_loop_once(winbind_event_context()) == -1) {
1239 DEBUG(1, ("tevent_loop_once() failed: %s\n",
1240 strerror(errno)));
1241 return 1;
1244 TALLOC_FREE(frame);
1247 return 0;