addns: Fix the Solaris/Illumos build.
[ira/wip.git] / source3 / winbindd / winbindd.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    Winbind daemon for ntdom nss module
5
6    Copyright (C) by Tim Potter 2000-2002
7    Copyright (C) Andrew Tridgell 2002
8    Copyright (C) Jelmer Vernooij 2003
9    Copyright (C) Volker Lendecke 2004
10
11    This program is free software; you can redistribute it and/or modify
12    it under the terms of the GNU General Public License as published by
13    the Free Software Foundation; either version 3 of the License, or
14    (at your option) any later version.
15
16    This program is distributed in the hope that it will be useful,
17    but WITHOUT ANY WARRANTY; without even the implied warranty of
18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19    GNU General Public License for more details.
20
21    You should have received a copy of the GNU General Public License
22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "popt_common.h"
27 #include "winbindd.h"
28 #include "nsswitch/winbind_client.h"
29 #include "nsswitch/wb_reqtrans.h"
30 #include "ntdomain.h"
31 #include "../librpc/gen_ndr/srv_lsa.h"
32 #include "../librpc/gen_ndr/srv_samr.h"
33 #include "secrets.h"
34 #include "idmap.h"
35 #include "lib/addrchange.h"
36 #include "serverid.h"
37 #include "auth.h"
38 #include "messages.h"
39
40 #undef DBGC_CLASS
41 #define DBGC_CLASS DBGC_WINBIND
42
43 static bool client_is_idle(struct winbindd_cli_state *state);
44 static void remove_client(struct winbindd_cli_state *state);
45
46 static bool opt_nocache = False;
47 static bool interactive = False;
48
49 extern bool override_logfile;
50
51 struct messaging_context *winbind_messaging_context(void)
52 {
53         struct messaging_context *msg_ctx = server_messaging_context();
54         if (likely(msg_ctx != NULL)) {
55                 return msg_ctx;
56         }
57         smb_panic("Could not init winbindd's messaging context.\n");
58         return NULL;
59 }
60
61 /* Reload configuration */
62
63 static bool reload_services_file(const char *lfile)
64 {
65         bool ret;
66
67         if (lp_loaded()) {
68                 const char *fname = lp_configfile();
69
70                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
71                         set_dyn_CONFIGFILE(fname);
72                 }
73         }
74
75         /* if this is a child, restore the logfile to the special
76            name - <domain>, idmap, etc. */
77         if (lfile && *lfile) {
78                 lp_set_logfile(lfile);
79         }
80
81         reopen_logs();
82         ret = lp_load_global(get_dyn_CONFIGFILE());
83
84         reopen_logs();
85         load_interfaces();
86
87         return(ret);
88 }
89
90
91 static void winbindd_status(void)
92 {
93         struct winbindd_cli_state *tmp;
94
95         DEBUG(0, ("winbindd status:\n"));
96
97         /* Print client state information */
98
99         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
100
101         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
102                 DEBUG(2, ("\tclient list:\n"));
103                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
104                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
105                                      (unsigned long)tmp->pid, tmp->sock,
106                                      client_is_idle(tmp) ? "idle" : "active"));
107                 }
108         }
109 }
110
111 /* Flush client cache */
112
113 static void flush_caches(void)
114 {
115         /* We need to invalidate cached user list entries on a SIGHUP 
116            otherwise cached access denied errors due to restrict anonymous
117            hang around until the sequence number changes. */
118
119         if (!wcache_invalidate_cache()) {
120                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
121                 if (!winbindd_cache_validate_and_initialize()) {
122                         exit(1);
123                 }
124         }
125 }
126
127 static void flush_caches_noinit(void)
128 {
129         /*
130          * We need to invalidate cached user list entries on a SIGHUP
131          * otherwise cached access denied errors due to restrict anonymous
132          * hang around until the sequence number changes.
133          * NB
134          * Skip uninitialized domains when flush cache.
135          * If domain is not initialized, it means it is never
136          * used or never become online. look, wcache_invalidate_cache()
137          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
138          * for unused domains and large traffic for primay domain's DC if there
139          * are many domains..
140          */
141
142         if (!wcache_invalidate_cache_noinit()) {
143                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
144                 if (!winbindd_cache_validate_and_initialize()) {
145                         exit(1);
146                 }
147         }
148 }
149
150 /* Handle the signal by unlinking socket and exiting */
151
152 static void terminate(bool is_parent)
153 {
154         if (is_parent) {
155                 /* When parent goes away we should
156                  * remove the socket file. Not so
157                  * when children terminate.
158                  */ 
159                 char *path = NULL;
160
161                 if (asprintf(&path, "%s/%s",
162                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
163                         unlink(path);
164                         SAFE_FREE(path);
165                 }
166         }
167
168         idmap_close();
169
170         trustdom_cache_shutdown();
171
172         gencache_stabilize();
173
174 #if 0
175         if (interactive) {
176                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
177                 char *description = talloc_describe_all(mem_ctx);
178
179                 DEBUG(3, ("tallocs left:\n%s\n", description));
180                 talloc_destroy(mem_ctx);
181         }
182 #endif
183
184         if (is_parent) {
185                 serverid_deregister(procid_self());
186                 pidfile_unlink();
187         }
188
189         exit(0);
190 }
191
192 static void winbindd_sig_term_handler(struct tevent_context *ev,
193                                       struct tevent_signal *se,
194                                       int signum,
195                                       int count,
196                                       void *siginfo,
197                                       void *private_data)
198 {
199         bool *is_parent = talloc_get_type_abort(private_data, bool);
200
201         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
202                  signum, (int)*is_parent));
203         terminate(*is_parent);
204 }
205
206 /*
207   handle stdin becoming readable when we are in --foreground mode
208  */
209 static void winbindd_stdin_handler(struct tevent_context *ev,
210                                struct tevent_fd *fde,
211                                uint16_t flags,
212                                void *private_data)
213 {
214         char c;
215         if (read(0, &c, 1) != 1) {
216                 bool *is_parent = talloc_get_type_abort(private_data, bool);
217                 
218                 /* we have reached EOF on stdin, which means the
219                    parent has exited. Shutdown the server */
220                 DEBUG(0,("EOF on stdin (is_parent=%d)\n",
221                          (int)*is_parent));
222                 terminate(*is_parent);
223         }
224 }
225
226 bool winbindd_setup_sig_term_handler(bool parent)
227 {
228         struct tevent_signal *se;
229         bool *is_parent;
230
231         is_parent = talloc(winbind_event_context(), bool);
232         if (!is_parent) {
233                 return false;
234         }
235
236         *is_parent = parent;
237
238         se = tevent_add_signal(winbind_event_context(),
239                                is_parent,
240                                SIGTERM, 0,
241                                winbindd_sig_term_handler,
242                                is_parent);
243         if (!se) {
244                 DEBUG(0,("failed to setup SIGTERM handler"));
245                 talloc_free(is_parent);
246                 return false;
247         }
248
249         se = tevent_add_signal(winbind_event_context(),
250                                is_parent,
251                                SIGINT, 0,
252                                winbindd_sig_term_handler,
253                                is_parent);
254         if (!se) {
255                 DEBUG(0,("failed to setup SIGINT handler"));
256                 talloc_free(is_parent);
257                 return false;
258         }
259
260         se = tevent_add_signal(winbind_event_context(),
261                                is_parent,
262                                SIGQUIT, 0,
263                                winbindd_sig_term_handler,
264                                is_parent);
265         if (!se) {
266                 DEBUG(0,("failed to setup SIGINT handler"));
267                 talloc_free(is_parent);
268                 return false;
269         }
270
271         return true;
272 }
273
274 bool winbindd_setup_stdin_handler(bool parent, bool foreground)
275 {
276         bool *is_parent;
277
278         if (foreground) {
279                 is_parent = talloc(winbind_event_context(), bool);
280                 if (!is_parent) {
281                         return false;
282                 }
283                 
284                 *is_parent = parent;
285
286                 /* if we are running in the foreground then look for
287                    EOF on stdin, and exit if it happens. This allows
288                    us to die if the parent process dies
289                 */
290                 tevent_add_fd(winbind_event_context(), is_parent, 0, TEVENT_FD_READ, winbindd_stdin_handler, is_parent);
291         }
292         
293         return true;
294 }
295
296 static void winbindd_sig_hup_handler(struct tevent_context *ev,
297                                      struct tevent_signal *se,
298                                      int signum,
299                                      int count,
300                                      void *siginfo,
301                                      void *private_data)
302 {
303         const char *file = (const char *)private_data;
304
305         DEBUG(1,("Reloading services after SIGHUP\n"));
306         flush_caches_noinit();
307         reload_services_file(file);
308 }
309
310 bool winbindd_setup_sig_hup_handler(const char *lfile)
311 {
312         struct tevent_signal *se;
313         char *file = NULL;
314
315         if (lfile) {
316                 file = talloc_strdup(winbind_event_context(),
317                                      lfile);
318                 if (!file) {
319                         return false;
320                 }
321         }
322
323         se = tevent_add_signal(winbind_event_context(),
324                                winbind_event_context(),
325                                SIGHUP, 0,
326                                winbindd_sig_hup_handler,
327                                file);
328         if (!se) {
329                 return false;
330         }
331
332         return true;
333 }
334
335 static void winbindd_sig_chld_handler(struct tevent_context *ev,
336                                       struct tevent_signal *se,
337                                       int signum,
338                                       int count,
339                                       void *siginfo,
340                                       void *private_data)
341 {
342         pid_t pid;
343
344         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
345                 winbind_child_died(pid);
346         }
347 }
348
349 static bool winbindd_setup_sig_chld_handler(void)
350 {
351         struct tevent_signal *se;
352
353         se = tevent_add_signal(winbind_event_context(),
354                                winbind_event_context(),
355                                SIGCHLD, 0,
356                                winbindd_sig_chld_handler,
357                                NULL);
358         if (!se) {
359                 return false;
360         }
361
362         return true;
363 }
364
365 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
366                                       struct tevent_signal *se,
367                                       int signum,
368                                       int count,
369                                       void *siginfo,
370                                       void *private_data)
371 {
372         winbindd_status();
373 }
374
375 static bool winbindd_setup_sig_usr2_handler(void)
376 {
377         struct tevent_signal *se;
378
379         se = tevent_add_signal(winbind_event_context(),
380                                winbind_event_context(),
381                                SIGUSR2, 0,
382                                winbindd_sig_usr2_handler,
383                                NULL);
384         if (!se) {
385                 return false;
386         }
387
388         return true;
389 }
390
391 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
392 static void msg_reload_services(struct messaging_context *msg,
393                                 void *private_data,
394                                 uint32_t msg_type,
395                                 struct server_id server_id,
396                                 DATA_BLOB *data)
397 {
398         /* Flush various caches */
399         flush_caches();
400         reload_services_file((const char *) private_data);
401 }
402
403 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
404 static void msg_shutdown(struct messaging_context *msg,
405                          void *private_data,
406                          uint32_t msg_type,
407                          struct server_id server_id,
408                          DATA_BLOB *data)
409 {
410         /* only the parent waits for this message */
411         DEBUG(0,("Got shutdown message\n"));
412         terminate(true);
413 }
414
415
416 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
417                                        void *private_data,
418                                        uint32_t msg_type,
419                                        struct server_id server_id,
420                                        DATA_BLOB *data)
421 {
422         uint8 ret;
423         pid_t child_pid;
424         NTSTATUS status;
425
426         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
427                    "message.\n"));
428
429         /*
430          * call the validation code from a child:
431          * so we don't block the main winbindd and the validation
432          * code can safely use fork/waitpid...
433          */
434         child_pid = sys_fork();
435
436         if (child_pid == -1) {
437                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
438                           strerror(errno)));
439                 return;
440         }
441
442         if (child_pid != 0) {
443                 /* parent */
444                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
445                           "pid %d.\n", (int)child_pid));
446                 return;
447         }
448
449         /* child */
450
451         status = winbindd_reinit_after_fork(NULL, NULL);
452         if (!NT_STATUS_IS_OK(status)) {
453                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
454                           nt_errstr(status)));
455                 _exit(0);
456         }
457
458         /* install default SIGCHLD handler: validation code uses fork/waitpid */
459         CatchSignal(SIGCHLD, SIG_DFL);
460
461         ret = (uint8)winbindd_validate_cache_nobackup();
462         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
463         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
464                            (size_t)1);
465         _exit(0);
466 }
467
468 static struct winbindd_dispatch_table {
469         enum winbindd_cmd cmd;
470         void (*fn)(struct winbindd_cli_state *state);
471         const char *winbindd_cmd_name;
472 } dispatch_table[] = {
473
474         /* Enumeration functions */
475
476         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
477           "LIST_TRUSTDOM" },
478
479         /* Miscellaneous */
480
481         { WINBINDD_INFO, winbindd_info, "INFO" },
482         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
483           "INTERFACE_VERSION" },
484         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
485         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
486         { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
487         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
488         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
489           "WINBINDD_PRIV_PIPE_DIR" },
490
491         /* Credential cache access */
492         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
493         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
494
495         /* End of list */
496
497         { WINBINDD_NUM_CMDS, NULL, "NONE" }
498 };
499
500 struct winbindd_async_dispatch_table {
501         enum winbindd_cmd cmd;
502         const char *cmd_name;
503         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
504                                        struct tevent_context *ev,
505                                        struct winbindd_cli_state *cli,
506                                        struct winbindd_request *request);
507         NTSTATUS (*recv_req)(struct tevent_req *req,
508                              struct winbindd_response *presp);
509 };
510
511 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
512         { WINBINDD_PING, "PING",
513           wb_ping_send, wb_ping_recv },
514         { WINBINDD_LOOKUPSID, "LOOKUPSID",
515           winbindd_lookupsid_send, winbindd_lookupsid_recv },
516         { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
517           winbindd_lookupsids_send, winbindd_lookupsids_recv },
518         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
519           winbindd_lookupname_send, winbindd_lookupname_recv },
520         { WINBINDD_SID_TO_UID, "SID_TO_UID",
521           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
522         { WINBINDD_SID_TO_GID, "SID_TO_GID",
523           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
524         { WINBINDD_UID_TO_SID, "UID_TO_SID",
525           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
526         { WINBINDD_GID_TO_SID, "GID_TO_SID",
527           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
528         { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
529           winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
530         { WINBINDD_GETPWSID, "GETPWSID",
531           winbindd_getpwsid_send, winbindd_getpwsid_recv },
532         { WINBINDD_GETPWNAM, "GETPWNAM",
533           winbindd_getpwnam_send, winbindd_getpwnam_recv },
534         { WINBINDD_GETPWUID, "GETPWUID",
535           winbindd_getpwuid_send, winbindd_getpwuid_recv },
536         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
537           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
538         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
539           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
540         { WINBINDD_GETGROUPS, "GETGROUPS",
541           winbindd_getgroups_send, winbindd_getgroups_recv },
542         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
543           winbindd_show_sequence_send, winbindd_show_sequence_recv },
544         { WINBINDD_GETGRGID, "GETGRGID",
545           winbindd_getgrgid_send, winbindd_getgrgid_recv },
546         { WINBINDD_GETGRNAM, "GETGRNAM",
547           winbindd_getgrnam_send, winbindd_getgrnam_recv },
548         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
549           winbindd_getusersids_send, winbindd_getusersids_recv },
550         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
551           winbindd_lookuprids_send, winbindd_lookuprids_recv },
552         { WINBINDD_SETPWENT, "SETPWENT",
553           winbindd_setpwent_send, winbindd_setpwent_recv },
554         { WINBINDD_GETPWENT, "GETPWENT",
555           winbindd_getpwent_send, winbindd_getpwent_recv },
556         { WINBINDD_ENDPWENT, "ENDPWENT",
557           winbindd_endpwent_send, winbindd_endpwent_recv },
558         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
559           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
560         { WINBINDD_GETDCNAME, "GETDCNAME",
561           winbindd_getdcname_send, winbindd_getdcname_recv },
562         { WINBINDD_SETGRENT, "SETGRENT",
563           winbindd_setgrent_send, winbindd_setgrent_recv },
564         { WINBINDD_GETGRENT, "GETGRENT",
565           winbindd_getgrent_send, winbindd_getgrent_recv },
566         { WINBINDD_ENDGRENT, "ENDGRENT",
567           winbindd_endgrent_send, winbindd_endgrent_recv },
568         { WINBINDD_LIST_USERS, "LIST_USERS",
569           winbindd_list_users_send, winbindd_list_users_recv },
570         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
571           winbindd_list_groups_send, winbindd_list_groups_recv },
572         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
573           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
574         { WINBINDD_PING_DC, "PING_DC",
575           winbindd_ping_dc_send, winbindd_ping_dc_recv },
576         { WINBINDD_PAM_AUTH, "PAM_AUTH",
577           winbindd_pam_auth_send, winbindd_pam_auth_recv },
578         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
579           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
580         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
581           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
582         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
583           winbindd_pam_chng_pswd_auth_crap_send,
584           winbindd_pam_chng_pswd_auth_crap_recv },
585         { WINBINDD_WINS_BYIP, "WINS_BYIP",
586           winbindd_wins_byip_send, winbindd_wins_byip_recv },
587         { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
588           winbindd_wins_byname_send, winbindd_wins_byname_recv },
589
590         { 0, NULL, NULL, NULL }
591 };
592
593 static struct winbindd_async_dispatch_table async_priv_table[] = {
594         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
595           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
596         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
597           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
598         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
599           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
600         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
601           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
602
603         { 0, NULL, NULL, NULL }
604 };
605
606 static void wb_request_done(struct tevent_req *req);
607
608 static void process_request(struct winbindd_cli_state *state)
609 {
610         struct winbindd_dispatch_table *table = dispatch_table;
611         struct winbindd_async_dispatch_table *atable;
612
613         state->mem_ctx = talloc_named(state, 0, "winbind request");
614         if (state->mem_ctx == NULL)
615                 return;
616
617         /* Remember who asked us. */
618         state->pid = state->request->pid;
619
620         state->cmd_name = "unknown request";
621         state->recv_fn = NULL;
622
623         /* Process command */
624
625         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
626                 if (state->request->cmd == atable->cmd) {
627                         break;
628                 }
629         }
630
631         if ((atable->send_req == NULL) && state->privileged) {
632                 for (atable = async_priv_table; atable->send_req;
633                      atable += 1) {
634                         if (state->request->cmd == atable->cmd) {
635                                 break;
636                         }
637                 }
638         }
639
640         if (atable->send_req != NULL) {
641                 struct tevent_req *req;
642
643                 state->cmd_name = atable->cmd_name;
644                 state->recv_fn = atable->recv_req;
645
646                 DEBUG(10, ("process_request: Handling async request %d:%s\n",
647                            (int)state->pid, state->cmd_name));
648
649                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
650                                        state, state->request);
651                 if (req == NULL) {
652                         DEBUG(0, ("process_request: atable->send failed for "
653                                   "%s\n", atable->cmd_name));
654                         request_error(state);
655                         return;
656                 }
657                 tevent_req_set_callback(req, wb_request_done, state);
658                 return;
659         }
660
661         state->response = talloc_zero(state->mem_ctx,
662                                       struct winbindd_response);
663         if (state->response == NULL) {
664                 DEBUG(10, ("talloc failed\n"));
665                 remove_client(state);
666                 return;
667         }
668         state->response->result = WINBINDD_PENDING;
669         state->response->length = sizeof(struct winbindd_response);
670
671         for (table = dispatch_table; table->fn; table++) {
672                 if (state->request->cmd == table->cmd) {
673                         DEBUG(10,("process_request: request fn %s\n",
674                                   table->winbindd_cmd_name ));
675                         state->cmd_name = table->winbindd_cmd_name;
676                         table->fn(state);
677                         break;
678                 }
679         }
680
681         if (!table->fn) {
682                 DEBUG(10,("process_request: unknown request fn number %d\n",
683                           (int)state->request->cmd ));
684                 request_error(state);
685         }
686 }
687
688 static void wb_request_done(struct tevent_req *req)
689 {
690         struct winbindd_cli_state *state = tevent_req_callback_data(
691                 req, struct winbindd_cli_state);
692         NTSTATUS status;
693
694         state->response = talloc_zero(state->mem_ctx,
695                                       struct winbindd_response);
696         if (state->response == NULL) {
697                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
698                           (int)state->pid, state->cmd_name));
699                 remove_client(state);
700                 return;
701         }
702         state->response->result = WINBINDD_PENDING;
703         state->response->length = sizeof(struct winbindd_response);
704
705         status = state->recv_fn(req, state->response);
706         TALLOC_FREE(req);
707
708         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
709                   (int)state->pid, state->cmd_name, nt_errstr(status)));
710
711         if (!NT_STATUS_IS_OK(status)) {
712                 request_error(state);
713                 return;
714         }
715         request_ok(state);
716 }
717
718 /*
719  * This is the main event loop of winbind requests. It goes through a
720  * state-machine of 3 read/write requests, 4 if you have extra data to send.
721  *
722  * An idle winbind client has a read request of 4 bytes outstanding,
723  * finalizing function is request_len_recv, checking the length. request_recv
724  * then processes the packet. The processing function then at some point has
725  * to call request_finished which schedules sending the response.
726  */
727
728 static void request_finished(struct winbindd_cli_state *state);
729
730 static void winbind_client_request_read(struct tevent_req *req);
731 static void winbind_client_response_written(struct tevent_req *req);
732
733 static void request_finished(struct winbindd_cli_state *state)
734 {
735         struct tevent_req *req;
736
737         TALLOC_FREE(state->request);
738
739         req = wb_resp_write_send(state, winbind_event_context(),
740                                  state->out_queue, state->sock,
741                                  state->response);
742         if (req == NULL) {
743                 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
744                           (int)state->pid, state->cmd_name));
745                 remove_client(state);
746                 return;
747         }
748         tevent_req_set_callback(req, winbind_client_response_written, state);
749 }
750
751 static void winbind_client_response_written(struct tevent_req *req)
752 {
753         struct winbindd_cli_state *state = tevent_req_callback_data(
754                 req, struct winbindd_cli_state);
755         ssize_t ret;
756         int err;
757
758         ret = wb_resp_write_recv(req, &err);
759         TALLOC_FREE(req);
760         if (ret == -1) {
761                 close(state->sock);
762                 state->sock = -1;
763                 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
764                           (int)state->pid, state->cmd_name, strerror(err)));
765                 remove_client(state);
766                 return;
767         }
768
769         DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
770                   "to client\n", (int)state->pid, state->cmd_name));
771
772         TALLOC_FREE(state->mem_ctx);
773         state->response = NULL;
774         state->cmd_name = "no request";
775         state->recv_fn = NULL;
776
777         req = wb_req_read_send(state, winbind_event_context(), state->sock,
778                                WINBINDD_MAX_EXTRA_DATA);
779         if (req == NULL) {
780                 remove_client(state);
781                 return;
782         }
783         tevent_req_set_callback(req, winbind_client_request_read, state);
784 }
785
786 void request_error(struct winbindd_cli_state *state)
787 {
788         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
789         state->response->result = WINBINDD_ERROR;
790         request_finished(state);
791 }
792
793 void request_ok(struct winbindd_cli_state *state)
794 {
795         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
796         state->response->result = WINBINDD_OK;
797         request_finished(state);
798 }
799
800 /* Process a new connection by adding it to the client connection list */
801
802 static void new_connection(int listen_sock, bool privileged)
803 {
804         struct sockaddr_un sunaddr;
805         struct winbindd_cli_state *state;
806         struct tevent_req *req;
807         socklen_t len;
808         int sock;
809
810         /* Accept connection */
811
812         len = sizeof(sunaddr);
813
814         sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
815
816         if (sock == -1) {
817                 if (errno != EINTR) {
818                         DEBUG(0, ("Faild to accept socket - %s\n",
819                                   strerror(errno)));
820                 }
821                 return;
822         }
823
824         DEBUG(6,("accepted socket %d\n", sock));
825
826         /* Create new connection structure */
827
828         if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
829                 close(sock);
830                 return;
831         }
832
833         state->sock = sock;
834
835         state->out_queue = tevent_queue_create(state, "winbind client reply");
836         if (state->out_queue == NULL) {
837                 close(sock);
838                 TALLOC_FREE(state);
839                 return;
840         }
841
842         state->last_access = time(NULL);        
843
844         state->privileged = privileged;
845
846         req = wb_req_read_send(state, winbind_event_context(), state->sock,
847                                WINBINDD_MAX_EXTRA_DATA);
848         if (req == NULL) {
849                 TALLOC_FREE(state);
850                 close(sock);
851                 return;
852         }
853         tevent_req_set_callback(req, winbind_client_request_read, state);
854
855         /* Add to connection list */
856
857         winbindd_add_client(state);
858 }
859
860 static void winbind_client_request_read(struct tevent_req *req)
861 {
862         struct winbindd_cli_state *state = tevent_req_callback_data(
863                 req, struct winbindd_cli_state);
864         ssize_t ret;
865         int err;
866
867         ret = wb_req_read_recv(req, state, &state->request, &err);
868         TALLOC_FREE(req);
869         if (ret == -1) {
870                 if (err == EPIPE) {
871                         DEBUG(6, ("closing socket %d, client exited\n",
872                                   state->sock));
873                 } else {
874                         DEBUG(2, ("Could not read client request from fd %d: "
875                                   "%s\n", state->sock, strerror(err)));
876                 }
877                 close(state->sock);
878                 state->sock = -1;
879                 remove_client(state);
880                 return;
881         }
882         process_request(state);
883 }
884
885 /* Remove a client connection from client connection list */
886
887 static void remove_client(struct winbindd_cli_state *state)
888 {
889         char c = 0;
890         int nwritten;
891
892         /* It's a dead client - hold a funeral */
893
894         if (state == NULL) {
895                 return;
896         }
897
898         if (state->sock != -1) {
899                 /* tell client, we are closing ... */
900                 nwritten = write(state->sock, &c, sizeof(c));
901                 if (nwritten == -1) {
902                         DEBUG(2, ("final write to client failed: %s\n",
903                                 strerror(errno)));
904                 }
905
906                 /* Close socket */
907
908                 close(state->sock);
909                 state->sock = -1;
910         }
911
912         TALLOC_FREE(state->mem_ctx);
913
914         /* Remove from list and free */
915
916         winbindd_remove_client(state);
917         TALLOC_FREE(state);
918 }
919
920 /* Is a client idle? */
921
922 static bool client_is_idle(struct winbindd_cli_state *state) {
923   return (state->response == NULL &&
924           !state->pwent_state && !state->grent_state);
925 }
926
927 /* Shutdown client connection which has been idle for the longest time */
928
929 static bool remove_idle_client(void)
930 {
931         struct winbindd_cli_state *state, *remove_state = NULL;
932         time_t last_access = 0;
933         int nidle = 0;
934
935         for (state = winbindd_client_list(); state; state = state->next) {
936                 if (client_is_idle(state)) {
937                         nidle++;
938                         if (!last_access || state->last_access < last_access) {
939                                 last_access = state->last_access;
940                                 remove_state = state;
941                         }
942                 }
943         }
944
945         if (remove_state) {
946                 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
947                         nidle, remove_state->sock, (unsigned int)remove_state->pid));
948                 remove_client(remove_state);
949                 return True;
950         }
951
952         return False;
953 }
954
955 struct winbindd_listen_state {
956         bool privileged;
957         int fd;
958 };
959
960 static void winbindd_listen_fde_handler(struct tevent_context *ev,
961                                         struct tevent_fd *fde,
962                                         uint16_t flags,
963                                         void *private_data)
964 {
965         struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
966                                           struct winbindd_listen_state);
967
968         while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
969                 DEBUG(5,("winbindd: Exceeding %d client "
970                          "connections, removing idle "
971                          "connection.\n", lp_winbind_max_clients()));
972                 if (!remove_idle_client()) {
973                         DEBUG(0,("winbindd: Exceeding %d "
974                                  "client connections, no idle "
975                                  "connection found\n",
976                                  lp_winbind_max_clients()));
977                         break;
978                 }
979         }
980         new_connection(s->fd, s->privileged);
981 }
982
983 /*
984  * Winbindd socket accessor functions
985  */
986
987 const char *get_winbind_pipe_dir(void)
988 {
989         return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
990 }
991
992 char *get_winbind_priv_pipe_dir(void)
993 {
994         return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
995 }
996
997 static bool winbindd_setup_listeners(void)
998 {
999         struct winbindd_listen_state *pub_state = NULL;
1000         struct winbindd_listen_state *priv_state = NULL;
1001         struct tevent_fd *fde;
1002         int rc;
1003
1004         pub_state = talloc(winbind_event_context(),
1005                            struct winbindd_listen_state);
1006         if (!pub_state) {
1007                 goto failed;
1008         }
1009
1010         pub_state->privileged = false;
1011         pub_state->fd = create_pipe_sock(
1012                 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
1013         if (pub_state->fd == -1) {
1014                 goto failed;
1015         }
1016         rc = listen(pub_state->fd, 5);
1017         if (rc < 0) {
1018                 goto failed;
1019         }
1020
1021         fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1022                             TEVENT_FD_READ, winbindd_listen_fde_handler,
1023                             pub_state);
1024         if (fde == NULL) {
1025                 close(pub_state->fd);
1026                 goto failed;
1027         }
1028         tevent_fd_set_auto_close(fde);
1029
1030         priv_state = talloc(winbind_event_context(),
1031                             struct winbindd_listen_state);
1032         if (!priv_state) {
1033                 goto failed;
1034         }
1035
1036         priv_state->privileged = true;
1037         priv_state->fd = create_pipe_sock(
1038                 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1039         if (priv_state->fd == -1) {
1040                 goto failed;
1041         }
1042         rc = listen(priv_state->fd, 5);
1043         if (rc < 0) {
1044                 goto failed;
1045         }
1046
1047         fde = tevent_add_fd(winbind_event_context(), priv_state,
1048                             priv_state->fd, TEVENT_FD_READ,
1049                             winbindd_listen_fde_handler, priv_state);
1050         if (fde == NULL) {
1051                 close(priv_state->fd);
1052                 goto failed;
1053         }
1054         tevent_fd_set_auto_close(fde);
1055
1056         return true;
1057 failed:
1058         TALLOC_FREE(pub_state);
1059         TALLOC_FREE(priv_state);
1060         return false;
1061 }
1062
1063 bool winbindd_use_idmap_cache(void)
1064 {
1065         return !opt_nocache;
1066 }
1067
1068 bool winbindd_use_cache(void)
1069 {
1070         return !opt_nocache;
1071 }
1072
1073 void winbindd_register_handlers(bool foreground)
1074 {
1075         /* Setup signal handlers */
1076
1077         if (!winbindd_setup_sig_term_handler(true))
1078                 exit(1);
1079         if (!winbindd_setup_stdin_handler(true, foreground))
1080                 exit(1);
1081         if (!winbindd_setup_sig_hup_handler(NULL))
1082                 exit(1);
1083         if (!winbindd_setup_sig_chld_handler())
1084                 exit(1);
1085         if (!winbindd_setup_sig_usr2_handler())
1086                 exit(1);
1087
1088         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
1089
1090         /*
1091          * Ensure all cache and idmap caches are consistent
1092          * and initialized before we startup.
1093          */
1094         if (!winbindd_cache_validate_and_initialize()) {
1095                 exit(1);
1096         }
1097
1098         /* get broadcast messages */
1099
1100         if (!serverid_register(procid_self(),
1101                                FLAG_MSG_GENERAL |
1102                                FLAG_MSG_WINBIND |
1103                                FLAG_MSG_DBWRAP)) {
1104                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1105                 exit(1);
1106         }
1107
1108         /* React on 'smbcontrol winbindd reload-config' in the same way
1109            as to SIGHUP signal */
1110         messaging_register(winbind_messaging_context(), NULL,
1111                            MSG_SMB_CONF_UPDATED, msg_reload_services);
1112         messaging_register(winbind_messaging_context(), NULL,
1113                            MSG_SHUTDOWN, msg_shutdown);
1114
1115         /* Handle online/offline messages. */
1116         messaging_register(winbind_messaging_context(), NULL,
1117                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
1118         messaging_register(winbind_messaging_context(), NULL,
1119                            MSG_WINBIND_ONLINE, winbind_msg_online);
1120         messaging_register(winbind_messaging_context(), NULL,
1121                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1122
1123         messaging_register(winbind_messaging_context(), NULL,
1124                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1125
1126         messaging_register(winbind_messaging_context(), NULL,
1127                            MSG_WINBIND_VALIDATE_CACHE,
1128                            winbind_msg_validate_cache);
1129
1130         messaging_register(winbind_messaging_context(), NULL,
1131                            MSG_WINBIND_DUMP_DOMAIN_LIST,
1132                            winbind_msg_dump_domain_list);
1133
1134         messaging_register(winbind_messaging_context(), NULL,
1135                            MSG_WINBIND_IP_DROPPED,
1136                            winbind_msg_ip_dropped_parent);
1137
1138         /* Register handler for MSG_DEBUG. */
1139         messaging_register(winbind_messaging_context(), NULL,
1140                            MSG_DEBUG,
1141                            winbind_msg_debug);
1142
1143         netsamlogon_cache_init(); /* Non-critical */
1144
1145         /* clear the cached list of trusted domains */
1146
1147         wcache_tdc_clear();
1148
1149         if (!init_domain_list()) {
1150                 DEBUG(0,("unable to initialize domain list\n"));
1151                 exit(1);
1152         }
1153
1154         init_idmap_child();
1155         init_locator_child();
1156
1157         smb_nscd_flush_user_cache();
1158         smb_nscd_flush_group_cache();
1159
1160         if (lp_allow_trusted_domains()) {
1161                 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1162                               rescan_trusted_domains, NULL) == NULL) {
1163                         DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1164                         exit(1);
1165                 }
1166         }
1167
1168 }
1169
1170 struct winbindd_addrchanged_state {
1171         struct addrchange_context *ctx;
1172         struct tevent_context *ev;
1173         struct messaging_context *msg_ctx;
1174 };
1175
1176 static void winbindd_addr_changed(struct tevent_req *req);
1177
1178 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1179                                      struct tevent_context *ev,
1180                                      struct messaging_context *msg_ctx)
1181 {
1182         struct winbindd_addrchanged_state *state;
1183         struct tevent_req *req;
1184         NTSTATUS status;
1185
1186         state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1187         if (state == NULL) {
1188                 DEBUG(10, ("talloc failed\n"));
1189                 return;
1190         }
1191         state->ev = ev;
1192         state->msg_ctx = msg_ctx;
1193
1194         status = addrchange_context_create(state, &state->ctx);
1195         if (!NT_STATUS_IS_OK(status)) {
1196                 DEBUG(10, ("addrchange_context_create failed: %s\n",
1197                            nt_errstr(status)));
1198                 TALLOC_FREE(state);
1199                 return;
1200         }
1201         req = addrchange_send(state, ev, state->ctx);
1202         if (req == NULL) {
1203                 DEBUG(0, ("addrchange_send failed\n"));
1204                 TALLOC_FREE(state);
1205                 return;
1206         }
1207         tevent_req_set_callback(req, winbindd_addr_changed, state);
1208 }
1209
1210 static void winbindd_addr_changed(struct tevent_req *req)
1211 {
1212         struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1213                 req, struct winbindd_addrchanged_state);
1214         enum addrchange_type type;
1215         struct sockaddr_storage addr;
1216         NTSTATUS status;
1217
1218         status = addrchange_recv(req, &type, &addr);
1219         TALLOC_FREE(req);
1220         if (!NT_STATUS_IS_OK(status)) {
1221                 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1222                            nt_errstr(status)));
1223                 TALLOC_FREE(state);
1224                 return;
1225         }
1226         if (type == ADDRCHANGE_DEL) {
1227                 char addrstr[INET6_ADDRSTRLEN];
1228                 DATA_BLOB blob;
1229
1230                 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1231
1232                 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1233                           addrstr));
1234
1235                 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1236
1237                 status = messaging_send(state->msg_ctx,
1238                                         messaging_server_id(state->msg_ctx),
1239                                         MSG_WINBIND_IP_DROPPED, &blob);
1240                 if (!NT_STATUS_IS_OK(status)) {
1241                         DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1242                                    nt_errstr(status)));
1243                 }
1244         }
1245         req = addrchange_send(state, state->ev, state->ctx);
1246         if (req == NULL) {
1247                 DEBUG(0, ("addrchange_send failed\n"));
1248                 TALLOC_FREE(state);
1249                 return;
1250         }
1251         tevent_req_set_callback(req, winbindd_addr_changed, state);
1252 }
1253
1254 /* Main function */
1255
1256 int main(int argc, char **argv, char **envp)
1257 {
1258         static bool is_daemon = False;
1259         static bool Fork = True;
1260         static bool log_stdout = False;
1261         static bool no_process_group = False;
1262         enum {
1263                 OPT_DAEMON = 1000,
1264                 OPT_FORK,
1265                 OPT_NO_PROCESS_GROUP,
1266                 OPT_LOG_STDOUT
1267         };
1268         struct poptOption long_options[] = {
1269                 POPT_AUTOHELP
1270                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1271                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1272                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1273                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1274                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1275                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1276                 POPT_COMMON_SAMBA
1277                 POPT_TABLEEND
1278         };
1279         poptContext pc;
1280         int opt;
1281         TALLOC_CTX *frame;
1282         NTSTATUS status;
1283
1284         /*
1285          * Do this before any other talloc operation
1286          */
1287         talloc_enable_null_tracking();
1288         frame = talloc_stackframe();
1289
1290         setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1291
1292         /* glibc (?) likes to print "User defined signal 1" and exit if a
1293            SIGUSR[12] is received before a handler is installed */
1294
1295         CatchSignal(SIGUSR1, SIG_IGN);
1296         CatchSignal(SIGUSR2, SIG_IGN);
1297
1298         fault_setup();
1299         dump_core_setup("winbindd", lp_logfile());
1300
1301         load_case_tables();
1302
1303         /* Initialise for running in non-root mode */
1304
1305         sec_init();
1306
1307         set_remote_machine_name("winbindd", False);
1308
1309         /* Set environment variable so we don't recursively call ourselves.
1310            This may also be useful interactively. */
1311
1312         if ( !winbind_off() ) {
1313                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
1314                 exit(1);
1315         }
1316
1317         /* Initialise samba/rpc client stuff */
1318
1319         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1320
1321         while ((opt = poptGetNextOpt(pc)) != -1) {
1322                 switch (opt) {
1323                         /* Don't become a daemon */
1324                 case OPT_DAEMON:
1325                         is_daemon = True;
1326                         break;
1327                 case 'i':
1328                         interactive = True;
1329                         log_stdout = True;
1330                         Fork = False;
1331                         break;
1332                 case OPT_FORK:
1333                         Fork = false;
1334                         break;
1335                 case OPT_NO_PROCESS_GROUP:
1336                         no_process_group = true;
1337                         break;
1338                 case OPT_LOG_STDOUT:
1339                         log_stdout = true;
1340                         break;
1341                 case 'n':
1342                         opt_nocache = true;
1343                         break;
1344                 default:
1345                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1346                                   poptBadOption(pc, 0), poptStrerror(opt));
1347                         poptPrintUsage(pc, stderr, 0);
1348                         exit(1);
1349                 }
1350         }
1351
1352         if (is_daemon && interactive) {
1353                 d_fprintf(stderr,"\nERROR: "
1354                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1355                 poptPrintUsage(pc, stderr, 0);
1356                 exit(1);
1357         }
1358
1359         if (log_stdout && Fork) {
1360                 d_fprintf(stderr, "\nERROR: "
1361                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1362                 poptPrintUsage(pc, stderr, 0);
1363                 exit(1);
1364         }
1365
1366         poptFreeContext(pc);
1367
1368         if (!override_logfile) {
1369                 char *lfile = NULL;
1370                 if (asprintf(&lfile,"%s/log.winbindd",
1371                                 get_dyn_LOGFILEBASE()) > 0) {
1372                         lp_set_logfile(lfile);
1373                         SAFE_FREE(lfile);
1374                 }
1375         }
1376
1377         if (log_stdout) {
1378                 setup_logging("winbindd", DEBUG_STDOUT);
1379         } else {
1380                 setup_logging("winbindd", DEBUG_FILE);
1381         }
1382         reopen_logs();
1383
1384         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1385         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1386
1387         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1388                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1389                 exit(1);
1390         }
1391
1392         /* Initialise messaging system */
1393
1394         if (winbind_messaging_context() == NULL) {
1395                 exit(1);
1396         }
1397
1398         if (!reload_services_file(NULL)) {
1399                 DEBUG(0, ("error opening config file\n"));
1400                 exit(1);
1401         }
1402
1403         if (!directory_exist(lp_lockdir())) {
1404                 mkdir(lp_lockdir(), 0755);
1405         }
1406
1407         /* Setup names. */
1408
1409         if (!init_names())
1410                 exit(1);
1411
1412         load_interfaces();
1413
1414         if (!secrets_init()) {
1415
1416                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1417                 return False;
1418         }
1419
1420         /* Unblock all signals we are interested in as they may have been
1421            blocked by the parent process. */
1422
1423         BlockSignals(False, SIGINT);
1424         BlockSignals(False, SIGQUIT);
1425         BlockSignals(False, SIGTERM);
1426         BlockSignals(False, SIGUSR1);
1427         BlockSignals(False, SIGUSR2);
1428         BlockSignals(False, SIGHUP);
1429         BlockSignals(False, SIGCHLD);
1430
1431         if (!interactive)
1432                 become_daemon(Fork, no_process_group, log_stdout);
1433
1434         pidfile_create("winbindd");
1435
1436 #if HAVE_SETPGID
1437         /*
1438          * If we're interactive we want to set our own process group for
1439          * signal management.
1440          */
1441         if (interactive && !no_process_group)
1442                 setpgid( (pid_t)0, (pid_t)0);
1443 #endif
1444
1445         TimeInit();
1446
1447         /* Don't use winbindd_reinit_after_fork here as
1448          * we're just starting up and haven't created any
1449          * winbindd-specific resources we must free yet. JRA.
1450          */
1451
1452         status = reinit_after_fork(winbind_messaging_context(),
1453                                    winbind_event_context(),
1454                                    false);
1455         if (!NT_STATUS_IS_OK(status)) {
1456                 DEBUG(0,("reinit_after_fork() failed\n"));
1457                 exit(1);
1458         }
1459
1460         winbindd_register_handlers(!Fork);
1461
1462         status = init_system_info();
1463         if (!NT_STATUS_IS_OK(status)) {
1464                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1465                           nt_errstr(status)));
1466                 exit(1);
1467         }
1468
1469         rpc_lsarpc_init(NULL);
1470         rpc_samr_init(NULL);
1471
1472         winbindd_init_addrchange(NULL, winbind_event_context(),
1473                                  winbind_messaging_context());
1474
1475         /* setup listen sockets */
1476
1477         if (!winbindd_setup_listeners()) {
1478                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1479                 exit(1);
1480         }
1481
1482         TALLOC_FREE(frame);
1483         /* Loop waiting for requests */
1484         while (1) {
1485                 frame = talloc_stackframe();
1486
1487                 if (tevent_loop_once(winbind_event_context()) == -1) {
1488                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
1489                                   strerror(errno)));
1490                         return 1;
1491                 }
1492
1493                 TALLOC_FREE(frame);
1494         }
1495
1496         return 0;
1497 }