s3:cleanupd: use MSG_SMB_BRL_VALIDATE to signal cleanupd unclean process shutdown
[vlendec/samba-autobuild/.git] / source3 / smbd / server.c
1 /*
2    Unix SMB/CIFS implementation.
3    Main SMB server routines
4    Copyright (C) Andrew Tridgell                1992-1998
5    Copyright (C) Martin Pool                    2002
6    Copyright (C) Jelmer Vernooij                2002-2003
7    Copyright (C) Volker Lendecke                1993-2007
8    Copyright (C) Jeremy Allison                 1993-2007
9
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "system/filesys.h"
26 #include "lib/util/server_id.h"
27 #include "popt_common.h"
28 #include "smbd/smbd.h"
29 #include "smbd/globals.h"
30 #include "registry/reg_init_full.h"
31 #include "libcli/auth/schannel.h"
32 #include "secrets.h"
33 #include "../lib/util/memcache.h"
34 #include "ctdbd_conn.h"
35 #include "util_cluster.h"
36 #include "printing/queue_process.h"
37 #include "rpc_server/rpc_service_setup.h"
38 #include "rpc_server/rpc_config.h"
39 #include "passdb.h"
40 #include "auth.h"
41 #include "messages.h"
42 #include "messages_ctdb.h"
43 #include "smbprofile.h"
44 #include "lib/id_cache.h"
45 #include "lib/param/param.h"
46 #include "lib/background.h"
47 #include "lib/conn_tdb.h"
48 #include "../lib/util/pidfile.h"
49 #include "lib/smbd_shim.h"
50 #include "scavenger.h"
51 #include "locking/leases_db.h"
52 #include "smbd/notifyd/notifyd.h"
53 #include "smbd/smbd_cleanupd.h"
54 #include "lib/util/sys_rw.h"
55 #include "cleanupdb.h"
56 #include "g_lock.h"
57
58 #ifdef CLUSTER_SUPPORT
59 #include "ctdb_protocol.h"
60 #endif
61
62 struct smbd_open_socket;
63 struct smbd_child_pid;
64
65 struct smbd_parent_context {
66         bool interactive;
67
68         struct tevent_context *ev_ctx;
69         struct messaging_context *msg_ctx;
70
71         /* the list of listening sockets */
72         struct smbd_open_socket *sockets;
73
74         /* the list of current child processes */
75         struct smbd_child_pid *children;
76         size_t num_children;
77
78         struct server_id cleanupd;
79         struct server_id notifyd;
80
81         struct tevent_timer *cleanup_te;
82 };
83
84 struct smbd_open_socket {
85         struct smbd_open_socket *prev, *next;
86         struct smbd_parent_context *parent;
87         int fd;
88         struct tevent_fd *fde;
89 };
90
91 struct smbd_child_pid {
92         struct smbd_child_pid *prev, *next;
93         pid_t pid;
94 };
95
96 extern void start_epmd(struct tevent_context *ev_ctx,
97                        struct messaging_context *msg_ctx);
98
99 extern void start_lsasd(struct tevent_context *ev_ctx,
100                         struct messaging_context *msg_ctx);
101
102 extern void start_fssd(struct tevent_context *ev_ctx,
103                        struct messaging_context *msg_ctx);
104
105 extern void start_mdssd(struct tevent_context *ev_ctx,
106                         struct messaging_context *msg_ctx);
107
108 /*******************************************************************
109  What to do when smb.conf is updated.
110  ********************************************************************/
111
112 static void smbd_parent_conf_updated(struct messaging_context *msg,
113                                      void *private_data,
114                                      uint32_t msg_type,
115                                      struct server_id server_id,
116                                      DATA_BLOB *data)
117 {
118         struct tevent_context *ev_ctx =
119                 talloc_get_type_abort(private_data, struct tevent_context);
120
121         DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
122                   "updated. Reloading.\n"));
123         change_to_root_user();
124         reload_services(NULL, NULL, false);
125         printing_subsystem_update(ev_ctx, msg, false);
126 }
127
128 /*******************************************************************
129  Delete a statcache entry.
130  ********************************************************************/
131
132 static void smb_stat_cache_delete(struct messaging_context *msg,
133                                   void *private_data,
134                                   uint32_t msg_tnype,
135                                   struct server_id server_id,
136                                   DATA_BLOB *data)
137 {
138         const char *name = (const char *)data->data;
139         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
140         stat_cache_delete(name);
141 }
142
143 /****************************************************************************
144   Send a SIGTERM to our process group.
145 *****************************************************************************/
146
147 static void  killkids(void)
148 {
149         if(am_parent) kill(0,SIGTERM);
150 }
151
152 static void msg_exit_server(struct messaging_context *msg,
153                             void *private_data,
154                             uint32_t msg_type,
155                             struct server_id server_id,
156                             DATA_BLOB *data)
157 {
158         DEBUG(3, ("got a SHUTDOWN message\n"));
159         exit_server_cleanly(NULL);
160 }
161
162 #ifdef DEVELOPER
163 static void msg_inject_fault(struct messaging_context *msg,
164                              void *private_data,
165                              uint32_t msg_type,
166                              struct server_id src,
167                              DATA_BLOB *data)
168 {
169         int sig;
170         struct server_id_buf tmp;
171
172         if (data->length != sizeof(sig)) {
173                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
174                           server_id_str_buf(src, &tmp)));
175                 return;
176         }
177
178         sig = *(int *)data->data;
179         if (sig == -1) {
180                 exit_server("internal error injected");
181                 return;
182         }
183
184 #if HAVE_STRSIGNAL
185         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
186                   server_id_str_buf(src, &tmp), sig, strsignal(sig)));
187 #else
188         DEBUG(0, ("Process %s requested injection of signal %d\n",
189                   server_id_str_buf(src, &tmp), sig));
190 #endif
191
192         kill(getpid(), sig);
193 }
194 #endif /* DEVELOPER */
195
196 static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
197                                            uint32_t msg_type, DATA_BLOB* data)
198 {
199         NTSTATUS status;
200         struct smbd_parent_context *parent = am_parent;
201         struct smbd_child_pid *child;
202
203         if (parent == NULL) {
204                 return NT_STATUS_INTERNAL_ERROR;
205         }
206
207         for (child = parent->children; child != NULL; child = child->next) {
208                 status = messaging_send(parent->msg_ctx,
209                                         pid_to_procid(child->pid),
210                                         msg_type, data);
211                 if (!NT_STATUS_IS_OK(status)) {
212                         DBG_DEBUG("messaging_send(%d) failed: %s\n",
213                                   (int)child->pid, nt_errstr(status));
214                 }
215         }
216         return NT_STATUS_OK;
217 }
218
219 static void smb_parent_send_to_children(struct messaging_context *ctx,
220                                         void* data,
221                                         uint32_t msg_type,
222                                         struct server_id srv_id,
223                                         DATA_BLOB* msg_data)
224 {
225         messaging_send_to_children(ctx, msg_type, msg_data);
226 }
227
228 /*
229  * Parent smbd process sets its own debug level first and then
230  * sends a message to all the smbd children to adjust their debug
231  * level to that of the parent.
232  */
233
234 static void smbd_msg_debug(struct messaging_context *msg_ctx,
235                            void *private_data,
236                            uint32_t msg_type,
237                            struct server_id server_id,
238                            DATA_BLOB *data)
239 {
240         debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
241
242         messaging_send_to_children(msg_ctx, MSG_DEBUG, data);
243 }
244
245 static void smbd_parent_id_cache_kill(struct messaging_context *msg_ctx,
246                                       void *private_data,
247                                       uint32_t msg_type,
248                                       struct server_id server_id,
249                                       DATA_BLOB* data)
250 {
251         const char *msg = (data && data->data)
252                 ? (const char *)data->data : "<NULL>";
253         struct id_cache_ref id;
254
255         if (!id_cache_ref_parse(msg, &id)) {
256                 DEBUG(0, ("Invalid ?ID: %s\n", msg));
257                 return;
258         }
259
260         id_cache_delete_from_cache(&id);
261
262         messaging_send_to_children(msg_ctx, msg_type, data);
263 }
264
265 static void smbd_parent_id_cache_delete(struct messaging_context *ctx,
266                                         void* data,
267                                         uint32_t msg_type,
268                                         struct server_id srv_id,
269                                         DATA_BLOB* msg_data)
270 {
271         id_cache_delete_message(ctx, data, msg_type, srv_id, msg_data);
272
273         messaging_send_to_children(ctx, msg_type, msg_data);
274 }
275
276 #ifdef CLUSTER_SUPPORT
277 static int smbd_parent_ctdb_reconfigured(
278         struct tevent_context *ev,
279         uint32_t src_vnn, uint32_t dst_vnn, uint64_t dst_srvid,
280         const uint8_t *msg, size_t msglen, void *private_data)
281 {
282         struct messaging_context *msg_ctx = talloc_get_type_abort(
283                 private_data, struct messaging_context);
284
285         DEBUG(10, ("Got %s message\n", (dst_srvid == CTDB_SRVID_RECONFIGURE)
286                    ? "cluster reconfigure" : "SAMBA_NOTIFY"));
287
288         /*
289          * Someone from the family died, validate our locks
290          */
291
292         if (am_parent) {
293                 messaging_send_buf(msg_ctx, am_parent->cleanupd,
294                                    MSG_SMB_BRL_VALIDATE, NULL, 0);
295         }
296
297         return 0;
298 }
299 #endif
300
301 static void add_child_pid(struct smbd_parent_context *parent,
302                           pid_t pid)
303 {
304         struct smbd_child_pid *child;
305
306         child = talloc_zero(parent, struct smbd_child_pid);
307         if (child == NULL) {
308                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
309                 return;
310         }
311         child->pid = pid;
312         DLIST_ADD(parent->children, child);
313         parent->num_children += 1;
314 }
315
316 static void smb_tell_num_children(struct messaging_context *ctx, void *data,
317                                   uint32_t msg_type, struct server_id srv_id,
318                                   DATA_BLOB *msg_data)
319 {
320         uint8_t buf[sizeof(uint32_t)];
321
322         if (am_parent) {
323                 SIVAL(buf, 0, am_parent->num_children);
324                 messaging_send_buf(ctx, srv_id, MSG_SMB_NUM_CHILDREN,
325                                    buf, sizeof(buf));
326         }
327 }
328
329 static void notifyd_stopped(struct tevent_req *req);
330
331 static struct tevent_req *notifyd_req(struct messaging_context *msg_ctx,
332                                       struct tevent_context *ev)
333 {
334         struct tevent_req *req;
335         sys_notify_watch_fn sys_notify_watch = NULL;
336         struct sys_notify_context *sys_notify_ctx = NULL;
337         struct ctdbd_connection *ctdbd_conn = NULL;
338
339         if (lp_kernel_change_notify()) {
340
341 #ifdef HAVE_INOTIFY
342                 if (lp_parm_bool(-1, "notify", "inotify", true)) {
343                         sys_notify_watch = inotify_watch;
344                 }
345 #endif
346
347 #ifdef HAVE_FAM
348                 if (lp_parm_bool(-1, "notify", "fam",
349                                  (sys_notify_watch == NULL))) {
350                         sys_notify_watch = fam_watch;
351                 }
352 #endif
353         }
354
355         if (sys_notify_watch != NULL) {
356                 sys_notify_ctx = sys_notify_context_create(msg_ctx, ev);
357                 if (sys_notify_ctx == NULL) {
358                         return NULL;
359                 }
360         }
361
362         if (lp_clustering()) {
363                 ctdbd_conn = messaging_ctdb_connection();
364         }
365
366         req = notifyd_send(msg_ctx, ev, msg_ctx, ctdbd_conn,
367                            sys_notify_watch, sys_notify_ctx);
368         if (req == NULL) {
369                 TALLOC_FREE(sys_notify_ctx);
370                 return NULL;
371         }
372         tevent_req_set_callback(req, notifyd_stopped, msg_ctx);
373
374         return req;
375 }
376
377 static void notifyd_stopped(struct tevent_req *req)
378 {
379         int ret;
380
381         ret = notifyd_recv(req);
382         TALLOC_FREE(req);
383         DEBUG(1, ("notifyd stopped: %s\n", strerror(ret)));
384 }
385
386 static bool smbd_notifyd_init(struct messaging_context *msg, bool interactive,
387                               struct server_id *ppid)
388 {
389         struct tevent_context *ev = messaging_tevent_context(msg);
390         struct tevent_req *req;
391         pid_t pid;
392         NTSTATUS status;
393         bool ok;
394
395         if (interactive) {
396                 req = notifyd_req(msg, ev);
397                 return (req != NULL);
398         }
399
400         pid = fork();
401         if (pid == -1) {
402                 DEBUG(1, ("%s: fork failed: %s\n", __func__,
403                           strerror(errno)));
404                 return false;
405         }
406
407         if (pid != 0) {
408                 if (am_parent != 0) {
409                         add_child_pid(am_parent, pid);
410                 }
411                 *ppid = pid_to_procid(pid);
412                 return true;
413         }
414
415         status = smbd_reinit_after_fork(msg, ev, true, "smbd-notifyd");
416         if (!NT_STATUS_IS_OK(status)) {
417                 DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
418                           __func__, nt_errstr(status)));
419                 exit(1);
420         }
421
422         req = notifyd_req(msg, ev);
423         if (req == NULL) {
424                 exit(1);
425         }
426         tevent_req_set_callback(req, notifyd_stopped, msg);
427
428         /* Block those signals that we are not handling */
429         BlockSignals(True, SIGHUP);
430         BlockSignals(True, SIGUSR1);
431
432         messaging_send(msg, pid_to_procid(getppid()), MSG_SMB_NOTIFY_STARTED,
433                        NULL);
434
435         ok = tevent_req_poll(req, ev);
436         if (!ok) {
437                 DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
438                 exit(1);
439         }
440         exit(0);
441 }
442
443 static void notifyd_init_trigger(struct tevent_req *req);
444
445 struct notifyd_init_state {
446         bool ok;
447         struct tevent_context *ev;
448         struct messaging_context *msg;
449         struct server_id *ppid;
450 };
451
452 static struct tevent_req *notifyd_init_send(struct tevent_context *ev,
453                                             TALLOC_CTX *mem_ctx,
454                                             struct messaging_context *msg,
455                                             struct server_id *ppid)
456 {
457         struct tevent_req *req = NULL;
458         struct tevent_req *subreq = NULL;
459         struct notifyd_init_state *state = NULL;
460
461         req = tevent_req_create(mem_ctx, &state, struct notifyd_init_state);
462         if (req == NULL) {
463                 return NULL;
464         }
465
466         *state = (struct notifyd_init_state) {
467                 .msg = msg,
468                 .ev = ev,
469                 .ppid = ppid
470         };
471
472         subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(1, 0));
473         if (tevent_req_nomem(subreq, req)) {
474                 return tevent_req_post(req, ev);
475         }
476
477         tevent_req_set_callback(subreq, notifyd_init_trigger, req);
478         return req;
479 }
480
481 static void notifyd_init_trigger(struct tevent_req *subreq)
482 {
483         struct tevent_req *req = tevent_req_callback_data(
484                 subreq, struct tevent_req);
485         struct notifyd_init_state *state = tevent_req_data(
486                 req, struct notifyd_init_state);
487         bool ok;
488
489         DBG_NOTICE("Triggering notifyd startup\n");
490
491         ok = tevent_wakeup_recv(subreq);
492         TALLOC_FREE(subreq);
493         if (!ok) {
494                 tevent_req_error(req, ENOMEM);
495                 return;
496         }
497
498         state->ok = smbd_notifyd_init(state->msg, false, state->ppid);
499         if (state->ok) {
500                 DBG_WARNING("notifyd restarted\n");
501                 tevent_req_done(req);
502                 return;
503         }
504
505         DBG_NOTICE("notifyd startup failed, rescheduling\n");
506
507         subreq = tevent_wakeup_send(state, state->ev,
508                                     tevent_timeval_current_ofs(1, 0));
509         if (tevent_req_nomem(subreq, req)) {
510                 DBG_ERR("scheduling notifyd restart failed, giving up\n");
511                 return;
512         }
513
514         tevent_req_set_callback(subreq, notifyd_init_trigger, req);
515         return;
516 }
517
518 static bool notifyd_init_recv(struct tevent_req *req)
519 {
520         struct notifyd_init_state *state = tevent_req_data(
521                 req, struct notifyd_init_state);
522
523         return state->ok;
524 }
525
526 static void notifyd_started(struct tevent_req *req)
527 {
528         bool ok;
529
530         ok = notifyd_init_recv(req);
531         TALLOC_FREE(req);
532         if (!ok) {
533                 DBG_ERR("Failed to restart notifyd, giving up\n");
534                 return;
535         }
536 }
537
538 static void cleanupd_stopped(struct tevent_req *req);
539
540 static bool cleanupd_init(struct messaging_context *msg, bool interactive,
541                           struct server_id *ppid)
542 {
543         struct tevent_context *ev = messaging_tevent_context(msg);
544         struct server_id parent_id = messaging_server_id(msg);
545         struct tevent_req *req;
546         pid_t pid;
547         NTSTATUS status;
548         ssize_t rwret;
549         int ret;
550         bool ok;
551         char c;
552         int up_pipe[2];
553
554         if (interactive) {
555                 req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
556                 *ppid = messaging_server_id(msg);
557                 return (req != NULL);
558         }
559
560         ret = pipe(up_pipe);
561         if (ret == -1) {
562                 DBG_WARNING("pipe failed: %s\n", strerror(errno));
563                 return false;
564         }
565
566         pid = fork();
567         if (pid == -1) {
568                 DBG_WARNING("fork failed: %s\n", strerror(errno));
569                 close(up_pipe[0]);
570                 close(up_pipe[1]);
571                 return false;
572         }
573
574         if (pid != 0) {
575
576                 close(up_pipe[1]);
577                 rwret = sys_read(up_pipe[0], &c, 1);
578                 close(up_pipe[0]);
579
580                 if (rwret == -1) {
581                         DBG_WARNING("sys_read failed: %s\n", strerror(errno));
582                         return false;
583                 }
584                 if (rwret == 0) {
585                         DBG_WARNING("cleanupd could not start\n");
586                         return false;
587                 }
588                 if (c != 0) {
589                         DBG_WARNING("cleanupd returned %d\n", (int)c);
590                         return false;
591                 }
592
593                 DBG_DEBUG("Started cleanupd pid=%d\n", (int)pid);
594
595                 if (am_parent != NULL) {
596                         add_child_pid(am_parent, pid);
597                 }
598
599                 *ppid = pid_to_procid(pid);
600                 return true;
601         }
602
603         close(up_pipe[0]);
604
605         status = smbd_reinit_after_fork(msg, ev, true, "cleanupd");
606         if (!NT_STATUS_IS_OK(status)) {
607                 DBG_WARNING("reinit_after_fork failed: %s\n",
608                             nt_errstr(status));
609                 c = 1;
610                 sys_write(up_pipe[1], &c, 1);
611
612                 exit(1);
613         }
614
615         req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
616         if (req == NULL) {
617                 DBG_WARNING("smbd_cleanupd_send failed\n");
618                 c = 2;
619                 sys_write(up_pipe[1], &c, 1);
620
621                 exit(1);
622         }
623
624         tevent_req_set_callback(req, cleanupd_stopped, msg);
625
626         c = 0;
627         rwret = sys_write(up_pipe[1], &c, 1);
628         close(up_pipe[1]);
629
630         if (rwret == -1) {
631                 DBG_WARNING("sys_write failed: %s\n", strerror(errno));
632                 exit(1);
633         }
634         if (rwret != 1) {
635                 DBG_WARNING("sys_write could not write result\n");
636                 exit(1);
637         }
638
639         ok = tevent_req_poll(req, ev);
640         if (!ok) {
641                 DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
642         }
643         exit(0);
644 }
645
646 static void cleanupd_stopped(struct tevent_req *req)
647 {
648         NTSTATUS status;
649
650         status = smbd_cleanupd_recv(req);
651         DBG_WARNING("cleanupd stopped: %s\n", nt_errstr(status));
652 }
653
654 static void cleanupd_init_trigger(struct tevent_req *req);
655
656 struct cleanup_init_state {
657         bool ok;
658         struct tevent_context *ev;
659         struct messaging_context *msg;
660         struct server_id *ppid;
661 };
662
663 static struct tevent_req *cleanupd_init_send(struct tevent_context *ev,
664                                              TALLOC_CTX *mem_ctx,
665                                              struct messaging_context *msg,
666                                              struct server_id *ppid)
667 {
668         struct tevent_req *req = NULL;
669         struct tevent_req *subreq = NULL;
670         struct cleanup_init_state *state = NULL;
671
672         req = tevent_req_create(mem_ctx, &state, struct cleanup_init_state);
673         if (req == NULL) {
674                 return NULL;
675         }
676
677         *state = (struct cleanup_init_state) {
678                 .msg = msg,
679                 .ev = ev,
680                 .ppid = ppid
681         };
682
683         subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(0, 0));
684         if (tevent_req_nomem(subreq, req)) {
685                 return tevent_req_post(req, ev);
686         }
687
688         tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
689         return req;
690 }
691
692 static void cleanupd_init_trigger(struct tevent_req *subreq)
693 {
694         struct tevent_req *req = tevent_req_callback_data(
695                 subreq, struct tevent_req);
696         struct cleanup_init_state *state = tevent_req_data(
697                 req, struct cleanup_init_state);
698         bool ok;
699
700         DBG_NOTICE("Triggering cleanupd startup\n");
701
702         ok = tevent_wakeup_recv(subreq);
703         TALLOC_FREE(subreq);
704         if (!ok) {
705                 tevent_req_error(req, ENOMEM);
706                 return;
707         }
708
709         state->ok = cleanupd_init(state->msg, false, state->ppid);
710         if (state->ok) {
711                 DBG_WARNING("cleanupd restarted\n");
712                 tevent_req_done(req);
713                 return;
714         }
715
716         DBG_NOTICE("cleanupd startup failed, rescheduling\n");
717
718         subreq = tevent_wakeup_send(state, state->ev,
719                                     tevent_timeval_current_ofs(1, 0));
720         if (tevent_req_nomem(subreq, req)) {
721                 DBG_ERR("scheduling cleanupd restart failed, giving up\n");
722                 return;
723         }
724
725         tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
726         return;
727 }
728
729 static bool cleanupd_init_recv(struct tevent_req *req)
730 {
731         struct cleanup_init_state *state = tevent_req_data(
732                 req, struct cleanup_init_state);
733
734         return state->ok;
735 }
736
737 /*
738   at most every smbd:cleanuptime seconds (default 20), we scan the BRL
739   and locking database for entries to cleanup. As a side effect this
740   also cleans up dead entries in the connections database (due to the
741   traversal in message_send_all()
742
743   Using a timer for this prevents a flood of traversals when a large
744   number of clients disconnect at the same time (perhaps due to a
745   network outage).  
746 */
747
748 static void cleanup_timeout_fn(struct tevent_context *event_ctx,
749                                 struct tevent_timer *te,
750                                 struct timeval now,
751                                 void *private_data)
752 {
753         struct smbd_parent_context *parent =
754                 talloc_get_type_abort(private_data,
755                 struct smbd_parent_context);
756
757         parent->cleanup_te = NULL;
758
759         messaging_send_buf(parent->msg_ctx, parent->cleanupd,
760                            MSG_SMB_BRL_VALIDATE, NULL, 0);
761 }
762
763 static void cleanupd_started(struct tevent_req *req)
764 {
765         bool ok;
766         NTSTATUS status;
767         struct smbd_parent_context *parent = tevent_req_callback_data(
768                 req, struct smbd_parent_context);
769
770         ok = cleanupd_init_recv(req);
771         TALLOC_FREE(req);
772         if (!ok) {
773                 DBG_ERR("Failed to restart cleanupd, giving up\n");
774                 return;
775         }
776
777         status = messaging_send(parent->msg_ctx,
778                                 parent->cleanupd,
779                                 MSG_SMB_NOTIFY_CLEANUP,
780                                 &data_blob_null);
781         if (!NT_STATUS_IS_OK(status)) {
782                 DBG_ERR("messaging_send returned %s\n",
783                         nt_errstr(status));
784         }
785 }
786
787 static void remove_child_pid(struct smbd_parent_context *parent,
788                              pid_t pid,
789                              bool unclean_shutdown)
790 {
791         struct smbd_child_pid *child;
792         NTSTATUS status;
793         bool ok;
794
795         for (child = parent->children; child != NULL; child = child->next) {
796                 if (child->pid == pid) {
797                         struct smbd_child_pid *tmp = child;
798                         DLIST_REMOVE(parent->children, child);
799                         TALLOC_FREE(tmp);
800                         parent->num_children -= 1;
801                         break;
802                 }
803         }
804
805         if (child == NULL) {
806                 /* not all forked child processes are added to the children list */
807                 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
808                 return;
809         }
810
811         if (pid == procid_to_pid(&parent->cleanupd)) {
812                 struct tevent_req *req;
813
814                 server_id_set_disconnected(&parent->cleanupd);
815
816                 DBG_WARNING("Restarting cleanupd\n");
817                 req = cleanupd_init_send(messaging_tevent_context(parent->msg_ctx),
818                                          parent,
819                                          parent->msg_ctx,
820                                          &parent->cleanupd);
821                 if (req == NULL) {
822                         DBG_ERR("Failed to restart cleanupd\n");
823                         return;
824                 }
825                 tevent_req_set_callback(req, cleanupd_started, parent);
826                 return;
827         }
828
829         if (pid == procid_to_pid(&parent->notifyd)) {
830                 struct tevent_req *req;
831                 struct tevent_context *ev = messaging_tevent_context(
832                         parent->msg_ctx);
833
834                 server_id_set_disconnected(&parent->notifyd);
835
836                 DBG_WARNING("Restarting notifyd\n");
837                 req = notifyd_init_send(ev,
838                                         parent,
839                                         parent->msg_ctx,
840                                         &parent->notifyd);
841                 if (req == NULL) {
842                         DBG_ERR("Failed to restart notifyd\n");
843                         return;
844                 }
845                 tevent_req_set_callback(req, notifyd_started, parent);
846                 return;
847         }
848
849         ok = cleanupdb_store_child(pid, unclean_shutdown);
850         if (!ok) {
851                 DBG_ERR("cleanupdb_store_child failed\n");
852                 return;
853         }
854
855         if (!server_id_is_disconnected(&parent->cleanupd)) {
856                 status = messaging_send(parent->msg_ctx,
857                                         parent->cleanupd,
858                                         MSG_SMB_NOTIFY_CLEANUP,
859                                         &data_blob_null);
860                 if (!NT_STATUS_IS_OK(status)) {
861                         DBG_ERR("messaging_send returned %s\n",
862                                 nt_errstr(status));
863                 }
864         }
865
866         if (unclean_shutdown) {
867                 /* a child terminated uncleanly so tickle all
868                    processes to see if they can grab any of the
869                    pending locks
870                 */
871                 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
872                         (unsigned int)pid));
873                 if (parent->cleanup_te == NULL) {
874                         /* call the cleanup timer, but not too often */
875                         int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
876                         parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
877                                                 parent,
878                                                 timeval_current_ofs(cleanup_time, 0),
879                                                 cleanup_timeout_fn,
880                                                 parent);
881                         DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
882                 }
883         }
884 }
885
886 /****************************************************************************
887  Have we reached the process limit ?
888 ****************************************************************************/
889
890 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
891 {
892         int max_processes = lp_max_smbd_processes();
893
894         if (!max_processes)
895                 return True;
896
897         return parent->num_children < max_processes;
898 }
899
900 static void smbd_sig_chld_handler(struct tevent_context *ev,
901                                   struct tevent_signal *se,
902                                   int signum,
903                                   int count,
904                                   void *siginfo,
905                                   void *private_data)
906 {
907         pid_t pid;
908         int status;
909         struct smbd_parent_context *parent =
910                 talloc_get_type_abort(private_data,
911                 struct smbd_parent_context);
912
913         while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
914                 bool unclean_shutdown = False;
915
916                 /* If the child terminated normally, assume
917                    it was an unclean shutdown unless the
918                    status is 0
919                 */
920                 if (WIFEXITED(status)) {
921                         unclean_shutdown = WEXITSTATUS(status);
922                 }
923                 /* If the child terminated due to a signal
924                    we always assume it was unclean.
925                 */
926                 if (WIFSIGNALED(status)) {
927                         unclean_shutdown = True;
928                 }
929                 remove_child_pid(parent, pid, unclean_shutdown);
930         }
931 }
932
933 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
934 {
935         struct tevent_signal *se;
936
937         se = tevent_add_signal(parent->ev_ctx,
938                                parent, /* mem_ctx */
939                                SIGCHLD, 0,
940                                smbd_sig_chld_handler,
941                                parent);
942         if (!se) {
943                 exit_server("failed to setup SIGCHLD handler");
944         }
945 }
946
947 static void smbd_open_socket_close_fn(struct tevent_context *ev,
948                                       struct tevent_fd *fde,
949                                       int fd,
950                                       void *private_data)
951 {
952         /* this might be the socket_wrapper swrap_close() */
953         close(fd);
954 }
955
956 static void smbd_accept_connection(struct tevent_context *ev,
957                                    struct tevent_fd *fde,
958                                    uint16_t flags,
959                                    void *private_data)
960 {
961         struct smbd_open_socket *s = talloc_get_type_abort(private_data,
962                                      struct smbd_open_socket);
963         struct messaging_context *msg_ctx = s->parent->msg_ctx;
964         struct sockaddr_storage addr;
965         socklen_t in_addrlen = sizeof(addr);
966         int fd;
967         pid_t pid = 0;
968
969         fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
970         if (fd == -1 && errno == EINTR)
971                 return;
972
973         if (fd == -1) {
974                 DEBUG(0,("accept: %s\n",
975                          strerror(errno)));
976                 return;
977         }
978         smb_set_close_on_exec(fd);
979
980         if (s->parent->interactive) {
981                 reinit_after_fork(msg_ctx, ev, true, NULL);
982                 smbd_process(ev, msg_ctx, fd, true);
983                 exit_server_cleanly("end of interactive mode");
984                 return;
985         }
986
987         if (!allowable_number_of_smbd_processes(s->parent)) {
988                 close(fd);
989                 return;
990         }
991
992         pid = fork();
993         if (pid == 0) {
994                 NTSTATUS status = NT_STATUS_OK;
995
996                 /*
997                  * Can't use TALLOC_FREE here. Nulling out the argument to it
998                  * would overwrite memory we've just freed.
999                  */
1000                 talloc_free(s->parent);
1001                 s = NULL;
1002
1003                 /* Stop zombies, the parent explicitly handles
1004                  * them, counting worker smbds. */
1005                 CatchChild();
1006
1007                 status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL);
1008                 if (!NT_STATUS_IS_OK(status)) {
1009                         if (NT_STATUS_EQUAL(status,
1010                                             NT_STATUS_TOO_MANY_OPENED_FILES)) {
1011                                 DEBUG(0,("child process cannot initialize "
1012                                          "because too many files are open\n"));
1013                                 goto exit;
1014                         }
1015                         if (lp_clustering() &&
1016                             (NT_STATUS_EQUAL(
1017                                     status, NT_STATUS_INTERNAL_DB_ERROR) ||
1018                              NT_STATUS_EQUAL(
1019                                     status, NT_STATUS_CONNECTION_REFUSED))) {
1020                                 DEBUG(1, ("child process cannot initialize "
1021                                           "because connection to CTDB "
1022                                           "has failed: %s\n",
1023                                           nt_errstr(status)));
1024                                 goto exit;
1025                         }
1026
1027                         DEBUG(0,("reinit_after_fork() failed\n"));
1028                         smb_panic("reinit_after_fork() failed");
1029                 }
1030
1031                 smbd_process(ev, msg_ctx, fd, false);
1032          exit:
1033                 exit_server_cleanly("end of child");
1034                 return;
1035         }
1036
1037         if (pid < 0) {
1038                 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
1039                          strerror(errno)));
1040         }
1041
1042         /* The parent doesn't need this socket */
1043         close(fd);
1044
1045         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
1046                 Clear the closed fd info out of server_fd --
1047                 and more importantly, out of client_fd in
1048                 util_sock.c, to avoid a possible
1049                 getpeername failure if we reopen the logs
1050                 and use %I in the filename.
1051         */
1052
1053         if (pid != 0) {
1054                 add_child_pid(s->parent, pid);
1055         }
1056
1057         /* Force parent to check log size after
1058          * spawning child.  Fix from
1059          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
1060          * parent smbd will log to logserver.smb.  It
1061          * writes only two messages for each child
1062          * started/finished. But each child writes,
1063          * say, 50 messages also in logserver.smb,
1064          * begining with the debug_count of the
1065          * parent, before the child opens its own log
1066          * file logserver.client. In a worst case
1067          * scenario the size of logserver.smb would be
1068          * checked after about 50*50=2500 messages
1069          * (ca. 100kb).
1070          * */
1071         force_check_log_size();
1072 }
1073
1074 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
1075                                  struct tevent_context *ev_ctx,
1076                                  const struct sockaddr_storage *ifss,
1077                                  uint16_t port)
1078 {
1079         struct smbd_open_socket *s;
1080
1081         s = talloc(parent, struct smbd_open_socket);
1082         if (!s) {
1083                 return false;
1084         }
1085
1086         s->parent = parent;
1087         s->fd = open_socket_in(SOCK_STREAM,
1088                                port,
1089                                parent->sockets == NULL ? 0 : 2,
1090                                ifss,
1091                                true);
1092         if (s->fd == -1) {
1093                 DEBUG(0,("smbd_open_one_socket: open_socket_in: "
1094                         "%s\n", strerror(errno)));
1095                 TALLOC_FREE(s);
1096                 /*
1097                  * We ignore an error here, as we've done before
1098                  */
1099                 return true;
1100         }
1101
1102         /* ready to listen */
1103         set_socket_options(s->fd, "SO_KEEPALIVE");
1104         set_socket_options(s->fd, lp_socket_options());
1105
1106         /* Set server socket to
1107          * non-blocking for the accept. */
1108         set_blocking(s->fd, False);
1109
1110         if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
1111                 DEBUG(0,("smbd_open_one_socket: listen: "
1112                         "%s\n", strerror(errno)));
1113                         close(s->fd);
1114                 TALLOC_FREE(s);
1115                 return false;
1116         }
1117
1118         s->fde = tevent_add_fd(ev_ctx,
1119                                s,
1120                                s->fd, TEVENT_FD_READ,
1121                                smbd_accept_connection,
1122                                s);
1123         if (!s->fde) {
1124                 DEBUG(0,("smbd_open_one_socket: "
1125                          "tevent_add_fd: %s\n",
1126                          strerror(errno)));
1127                 close(s->fd);
1128                 TALLOC_FREE(s);
1129                 return false;
1130         }
1131         tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
1132
1133         DLIST_ADD_END(parent->sockets, s);
1134
1135         return true;
1136 }
1137
1138 /****************************************************************************
1139  Open the socket communication.
1140 ****************************************************************************/
1141
1142 static bool open_sockets_smbd(struct smbd_parent_context *parent,
1143                               struct tevent_context *ev_ctx,
1144                               struct messaging_context *msg_ctx,
1145                               const char *smb_ports)
1146 {
1147         int num_interfaces = iface_count();
1148         int i,j;
1149         const char **ports;
1150         unsigned dns_port = 0;
1151
1152 #ifdef HAVE_ATEXIT
1153         atexit(killkids);
1154 #endif
1155
1156         /* Stop zombies */
1157         smbd_setup_sig_chld_handler(parent);
1158
1159         ports = lp_smb_ports();
1160
1161         /* use a reasonable default set of ports - listing on 445 and 139 */
1162         if (smb_ports) {
1163                 char **l;
1164                 l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
1165                 ports = discard_const_p(const char *, l);
1166         }
1167
1168         for (j = 0; ports && ports[j]; j++) {
1169                 unsigned port = atoi(ports[j]);
1170
1171                 if (port == 0 || port > 0xffff) {
1172                         exit_server_cleanly("Invalid port in the config or on "
1173                                             "the commandline specified!");
1174                 }
1175         }
1176
1177         if (lp_interfaces() && lp_bind_interfaces_only()) {
1178                 /* We have been given an interfaces line, and been
1179                    told to only bind to those interfaces. Create a
1180                    socket per interface and bind to only these.
1181                 */
1182
1183                 /* Now open a listen socket for each of the
1184                    interfaces. */
1185                 for(i = 0; i < num_interfaces; i++) {
1186                         const struct sockaddr_storage *ifss =
1187                                         iface_n_sockaddr_storage(i);
1188                         if (ifss == NULL) {
1189                                 DEBUG(0,("open_sockets_smbd: "
1190                                         "interface %d has NULL IP address !\n",
1191                                         i));
1192                                 continue;
1193                         }
1194
1195                         for (j = 0; ports && ports[j]; j++) {
1196                                 unsigned port = atoi(ports[j]);
1197
1198                                 /* Keep the first port for mDNS service
1199                                  * registration.
1200                                  */
1201                                 if (dns_port == 0) {
1202                                         dns_port = port;
1203                                 }
1204
1205                                 if (!smbd_open_one_socket(parent,
1206                                                           ev_ctx,
1207                                                           ifss,
1208                                                           port)) {
1209                                         return false;
1210                                 }
1211                         }
1212                 }
1213         } else {
1214                 /* Just bind to 0.0.0.0 - accept connections
1215                    from anywhere. */
1216
1217                 const char *sock_addr;
1218                 char *sock_tok;
1219                 const char *sock_ptr;
1220
1221 #if HAVE_IPV6
1222                 sock_addr = "::,0.0.0.0";
1223 #else
1224                 sock_addr = "0.0.0.0";
1225 #endif
1226
1227                 for (sock_ptr=sock_addr;
1228                      next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
1229                         for (j = 0; ports && ports[j]; j++) {
1230                                 struct sockaddr_storage ss;
1231                                 unsigned port = atoi(ports[j]);
1232
1233                                 /* Keep the first port for mDNS service
1234                                  * registration.
1235                                  */
1236                                 if (dns_port == 0) {
1237                                         dns_port = port;
1238                                 }
1239
1240                                 /* open an incoming socket */
1241                                 if (!interpret_string_addr(&ss, sock_tok,
1242                                                 AI_NUMERICHOST|AI_PASSIVE)) {
1243                                         continue;
1244                                 }
1245
1246                                 /*
1247                                  * If we fail to open any sockets
1248                                  * in this loop the parent-sockets == NULL
1249                                  * case below will prevent us from starting.
1250                                  */
1251
1252                                 (void)smbd_open_one_socket(parent,
1253                                                   ev_ctx,
1254                                                   &ss,
1255                                                   port);
1256                         }
1257                 }
1258         }
1259
1260         if (parent->sockets == NULL) {
1261                 DEBUG(0,("open_sockets_smbd: No "
1262                         "sockets available to bind to.\n"));
1263                 return false;
1264         }
1265
1266         /* Listen to messages */
1267
1268         messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
1269         messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
1270                            smbd_parent_conf_updated);
1271         messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
1272                            smb_stat_cache_delete);
1273         messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
1274         messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
1275                            smb_parent_send_to_children);
1276         messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
1277                            smb_parent_send_to_children);
1278         messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
1279                            smb_tell_num_children);
1280
1281         messaging_register(msg_ctx, NULL,
1282                            ID_CACHE_DELETE, smbd_parent_id_cache_delete);
1283         messaging_register(msg_ctx, NULL,
1284                            ID_CACHE_KILL, smbd_parent_id_cache_kill);
1285         messaging_register(msg_ctx, NULL, MSG_SMB_NOTIFY_STARTED,
1286                            smb_parent_send_to_children);
1287
1288 #ifdef CLUSTER_SUPPORT
1289         if (lp_clustering()) {
1290                 struct ctdbd_connection *conn = messaging_ctdb_connection();
1291
1292                 register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE,
1293                                     smbd_parent_ctdb_reconfigured, msg_ctx);
1294                 register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY,
1295                                     smbd_parent_ctdb_reconfigured, msg_ctx);
1296         }
1297 #endif
1298
1299 #ifdef DEVELOPER
1300         messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
1301                            msg_inject_fault);
1302 #endif
1303
1304         if (lp_multicast_dns_register() && (dns_port != 0)) {
1305 #ifdef WITH_DNSSD_SUPPORT
1306                 smbd_setup_mdns_registration(ev_ctx,
1307                                              parent, dns_port);
1308 #endif
1309 #ifdef WITH_AVAHI_SUPPORT
1310                 void *avahi_conn;
1311
1312                 avahi_conn = avahi_start_register(ev_ctx,
1313                                                   ev_ctx,
1314                                                   dns_port);
1315                 if (avahi_conn == NULL) {
1316                         DEBUG(10, ("avahi_start_register failed\n"));
1317                 }
1318 #endif
1319         }
1320
1321         return true;
1322 }
1323
1324
1325 /*
1326   handle stdin becoming readable when we are in --foreground mode
1327  */
1328 static void smbd_stdin_handler(struct tevent_context *ev,
1329                                struct tevent_fd *fde,
1330                                uint16_t flags,
1331                                void *private_data)
1332 {
1333         char c;
1334         if (read(0, &c, 1) != 1) {
1335                 /* we have reached EOF on stdin, which means the
1336                    parent has exited. Shutdown the server */
1337                 exit_server_cleanly("EOF on stdin");
1338         }
1339 }
1340
1341 struct smbd_parent_tevent_trace_state {
1342         TALLOC_CTX *frame;
1343 };
1344
1345 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
1346                                               void *private_data)
1347 {
1348         struct smbd_parent_tevent_trace_state *state =
1349                 (struct smbd_parent_tevent_trace_state *)private_data;
1350
1351         switch (point) {
1352         case TEVENT_TRACE_BEFORE_WAIT:
1353                 break;
1354         case TEVENT_TRACE_AFTER_WAIT:
1355                 break;
1356         case TEVENT_TRACE_BEFORE_LOOP_ONCE:
1357                 TALLOC_FREE(state->frame);
1358                 state->frame = talloc_stackframe();
1359                 break;
1360         case TEVENT_TRACE_AFTER_LOOP_ONCE:
1361                 TALLOC_FREE(state->frame);
1362                 break;
1363         }
1364
1365         errno = 0;
1366 }
1367
1368 static void smbd_parent_loop(struct tevent_context *ev_ctx,
1369                              struct smbd_parent_context *parent)
1370 {
1371         struct smbd_parent_tevent_trace_state trace_state = {
1372                 .frame = NULL,
1373         };
1374         int ret = 0;
1375
1376         tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1377                                   &trace_state);
1378
1379         /* now accept incoming connections - forking a new process
1380            for each incoming connection */
1381         DEBUG(2,("waiting for connections\n"));
1382
1383         ret = tevent_loop_wait(ev_ctx);
1384         if (ret != 0) {
1385                 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1386                           ret, strerror(errno)));
1387         }
1388
1389         TALLOC_FREE(trace_state.frame);
1390
1391 /* NOTREACHED   return True; */
1392 }
1393
1394
1395 /****************************************************************************
1396  Initialise connect, service and file structs.
1397 ****************************************************************************/
1398
1399 static bool init_structs(void )
1400 {
1401         /*
1402          * Set the machine NETBIOS name if not already
1403          * set from the config file.
1404          */
1405
1406         if (!init_names())
1407                 return False;
1408
1409         if (!secrets_init())
1410                 return False;
1411
1412         return True;
1413 }
1414
1415 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1416                                          struct tevent_signal *se,
1417                                          int signum,
1418                                          int count,
1419                                          void *siginfo,
1420                                          void *private_data)
1421 {
1422         exit_server_cleanly("termination signal");
1423 }
1424
1425 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1426                                         struct tevent_signal *se,
1427                                         int signum,
1428                                         int count,
1429                                         void *siginfo,
1430                                         void *private_data)
1431 {
1432         struct smbd_parent_context *parent =
1433                 talloc_get_type_abort(private_data,
1434                 struct smbd_parent_context);
1435
1436         change_to_root_user();
1437         DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1438         reload_services(NULL, NULL, false);
1439
1440         printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1441 }
1442
1443 struct smbd_claim_version_state {
1444         TALLOC_CTX *mem_ctx;
1445         char *version;
1446 };
1447
1448 static void smbd_claim_version_parser(const struct g_lock_rec *locks,
1449                                       size_t num_locks,
1450                                       const uint8_t *data,
1451                                       size_t datalen,
1452                                       void *private_data)
1453 {
1454         struct smbd_claim_version_state *state = private_data;
1455
1456         if (datalen == 0) {
1457                 state->version = NULL;
1458                 return;
1459         }
1460         if (data[datalen-1] != '\0') {
1461                 DBG_WARNING("Invalid samba version\n");
1462                 dump_data(DBGLVL_WARNING, data, datalen);
1463                 state->version = NULL;
1464                 return;
1465         }
1466         state->version = talloc_strdup(state->mem_ctx, (const char *)data);
1467 }
1468
1469 static NTSTATUS smbd_claim_version(struct messaging_context *msg,
1470                                    const char *version)
1471 {
1472         const char *name = "samba_version_string";
1473         struct smbd_claim_version_state state;
1474         struct g_lock_ctx *ctx;
1475         NTSTATUS status;
1476
1477         ctx = g_lock_ctx_init(msg, msg);
1478         if (ctx == NULL) {
1479                 DBG_WARNING("g_lock_ctx_init failed\n");
1480                 return NT_STATUS_UNSUCCESSFUL;
1481         }
1482
1483         status = g_lock_lock(ctx, name, G_LOCK_READ,
1484                              (struct timeval) { .tv_sec = 60 });
1485         if (!NT_STATUS_IS_OK(status)) {
1486                 DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1487                             nt_errstr(status));
1488                 TALLOC_FREE(ctx);
1489                 return status;
1490         }
1491
1492         state = (struct smbd_claim_version_state) { .mem_ctx = ctx };
1493
1494         status = g_lock_dump(ctx, name, smbd_claim_version_parser, &state);
1495         if (!NT_STATUS_IS_OK(status) &&
1496             !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1497                 DBG_ERR("Could not read samba_version_string\n");
1498                 g_lock_unlock(ctx, name);
1499                 TALLOC_FREE(ctx);
1500                 return status;
1501         }
1502
1503         if ((state.version != NULL) && (strcmp(version, state.version) == 0)) {
1504                 /*
1505                  * Leave the read lock for us around. Someone else already
1506                  * set the version correctly
1507                  */
1508                 TALLOC_FREE(ctx);
1509                 return NT_STATUS_OK;
1510         }
1511
1512         status = g_lock_lock(ctx, name, G_LOCK_WRITE,
1513                              (struct timeval) { .tv_sec = 60 });
1514         if (!NT_STATUS_IS_OK(status)) {
1515                 DBG_WARNING("g_lock_lock(G_LOCK_WRITE) failed: %s\n",
1516                             nt_errstr(status));
1517                 DBG_ERR("smbd %s already running, refusing to start "
1518                         "version %s\n", state.version, version);
1519                 TALLOC_FREE(ctx);
1520                 return NT_STATUS_SXS_VERSION_CONFLICT;
1521         }
1522
1523         status = g_lock_write_data(ctx, name, (const uint8_t *)version,
1524                                    strlen(version)+1);
1525         if (!NT_STATUS_IS_OK(status)) {
1526                 DBG_WARNING("g_lock_write_data failed: %s\n",
1527                             nt_errstr(status));
1528                 TALLOC_FREE(ctx);
1529                 return status;
1530         }
1531
1532         status = g_lock_lock(ctx, name, G_LOCK_READ,
1533                              (struct timeval) { .tv_sec = 60 });
1534         if (!NT_STATUS_IS_OK(status)) {
1535                 DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1536                             nt_errstr(status));
1537                 TALLOC_FREE(ctx);
1538                 return status;
1539         }
1540
1541         /*
1542          * Leave "ctx" dangling so that g_lock.tdb keeps opened.
1543          */
1544         return NT_STATUS_OK;
1545 }
1546
1547 /****************************************************************************
1548  main program.
1549 ****************************************************************************/
1550
1551 /* Declare prototype for build_options() to avoid having to run it through
1552    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1553    prototype generation system is too complicated. */
1554
1555 extern void build_options(bool screen);
1556
1557  int main(int argc,const char *argv[])
1558 {
1559         /* shall I run as a daemon */
1560         bool is_daemon = false;
1561         bool interactive = false;
1562         bool Fork = true;
1563         bool no_process_group = false;
1564         bool log_stdout = false;
1565         char *ports = NULL;
1566         char *profile_level = NULL;
1567         int opt;
1568         poptContext pc;
1569         bool print_build_options = False;
1570         struct server_id main_server_id = {0};
1571         enum {
1572                 OPT_DAEMON = 1000,
1573                 OPT_INTERACTIVE,
1574                 OPT_FORK,
1575                 OPT_NO_PROCESS_GROUP,
1576                 OPT_LOG_STDOUT
1577         };
1578         struct poptOption long_options[] = {
1579         POPT_AUTOHELP
1580         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1581         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon) and log to stdout"},
1582         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1583         {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1584         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1585         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1586         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1587         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1588         POPT_COMMON_SAMBA
1589         POPT_TABLEEND
1590         };
1591         struct smbd_parent_context *parent = NULL;
1592         TALLOC_CTX *frame;
1593         NTSTATUS status;
1594         struct tevent_context *ev_ctx;
1595         struct messaging_context *msg_ctx;
1596         struct server_id server_id;
1597         struct tevent_signal *se;
1598         int profiling_level;
1599         char *np_dir = NULL;
1600         static const struct smbd_shim smbd_shim_fns =
1601         {
1602                 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1603                 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1604                 .change_to_root_user = smbd_change_to_root_user,
1605                 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1606                 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1607
1608                 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1609                 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1610
1611                 .become_root = smbd_become_root,
1612                 .unbecome_root = smbd_unbecome_root,
1613
1614                 .exit_server = smbd_exit_server,
1615                 .exit_server_cleanly = smbd_exit_server_cleanly,
1616         };
1617
1618         /*
1619          * Do this before any other talloc operation
1620          */
1621         talloc_enable_null_tracking();
1622         frame = talloc_stackframe();
1623
1624         setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1625
1626         smb_init_locale();
1627
1628         set_smbd_shim(&smbd_shim_fns);
1629
1630         smbd_init_globals();
1631
1632         TimeInit();
1633
1634 #ifdef HAVE_SET_AUTH_PARAMETERS
1635         set_auth_parameters(argc,argv);
1636 #endif
1637
1638         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1639         while((opt = poptGetNextOpt(pc)) != -1) {
1640                 switch (opt)  {
1641                 case OPT_DAEMON:
1642                         is_daemon = true;
1643                         break;
1644                 case OPT_INTERACTIVE:
1645                         interactive = true;
1646                         break;
1647                 case OPT_FORK:
1648                         Fork = false;
1649                         break;
1650                 case OPT_NO_PROCESS_GROUP:
1651                         no_process_group = true;
1652                         break;
1653                 case OPT_LOG_STDOUT:
1654                         log_stdout = true;
1655                         break;
1656                 case 'b':
1657                         print_build_options = True;
1658                         break;
1659                 default:
1660                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1661                                   poptBadOption(pc, 0), poptStrerror(opt));
1662                         poptPrintUsage(pc, stderr, 0);
1663                         exit(1);
1664                 }
1665         }
1666         poptFreeContext(pc);
1667
1668         if (interactive) {
1669                 Fork = False;
1670                 log_stdout = True;
1671         }
1672
1673         if (log_stdout) {
1674                 setup_logging(argv[0], DEBUG_STDOUT);
1675         } else {
1676                 setup_logging(argv[0], DEBUG_FILE);
1677         }
1678
1679         if (print_build_options) {
1680                 build_options(True); /* Display output to screen as well as debug */
1681                 exit(0);
1682         }
1683
1684 #ifdef HAVE_SETLUID
1685         /* needed for SecureWare on SCO */
1686         setluid(0);
1687 #endif
1688
1689         set_remote_machine_name("smbd", False);
1690
1691         if (interactive && (DEBUGLEVEL >= 9)) {
1692                 talloc_enable_leak_report();
1693         }
1694
1695         if (log_stdout && Fork) {
1696                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1697                 exit(1);
1698         }
1699
1700         /*
1701          * We want to die early if we can't open /dev/urandom
1702          */
1703         generate_random_buffer(NULL, 0);
1704
1705         /* get initial effective uid and gid */
1706         sec_init();
1707
1708         /* make absolutely sure we run as root - to handle cases where people
1709            are crazy enough to have it setuid */
1710         gain_root_privilege();
1711         gain_root_group_privilege();
1712
1713         fault_setup();
1714         dump_core_setup("smbd", lp_logfile(talloc_tos()));
1715
1716         /* we are never interested in SIGPIPE */
1717         BlockSignals(True,SIGPIPE);
1718
1719 #if defined(SIGFPE)
1720         /* we are never interested in SIGFPE */
1721         BlockSignals(True,SIGFPE);
1722 #endif
1723
1724 #if defined(SIGUSR2)
1725         /* We are no longer interested in USR2 */
1726         BlockSignals(True,SIGUSR2);
1727 #endif
1728
1729         /* POSIX demands that signals are inherited. If the invoking process has
1730          * these signals masked, we will have problems, as we won't recieve them. */
1731         BlockSignals(False, SIGHUP);
1732         BlockSignals(False, SIGUSR1);
1733         BlockSignals(False, SIGTERM);
1734
1735         /* Ensure we leave no zombies until we
1736          * correctly set up child handling below. */
1737
1738         CatchChild();
1739
1740         /* we want total control over the permissions on created files,
1741            so set our umask to 0 */
1742         umask(0);
1743
1744         reopen_logs();
1745
1746         DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1747         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1748
1749         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1750                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1751
1752         /* Output the build options to the debug log */ 
1753         build_options(False);
1754
1755         if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1756                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1757                 exit(1);
1758         }
1759
1760         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1761                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1762                 exit(1);
1763         }
1764
1765         if (!cluster_probe_ok()) {
1766                 exit(1);
1767         }
1768
1769         /* Init the security context and global current_user */
1770         init_sec_ctx();
1771
1772         /*
1773          * Initialize the event context. The event context needs to be
1774          * initialized before the messaging context, cause the messaging
1775          * context holds an event context.
1776          */
1777         ev_ctx = server_event_context();
1778         if (ev_ctx == NULL) {
1779                 exit(1);
1780         }
1781
1782         /*
1783          * Init the messaging context
1784          * FIXME: This should only call messaging_init()
1785          */
1786         msg_ctx = server_messaging_context();
1787         if (msg_ctx == NULL) {
1788                 exit(1);
1789         }
1790
1791         /*
1792          * Reloading of the printers will not work here as we don't have a
1793          * server info and rpc services set up. It will be called later.
1794          */
1795         if (!reload_services(NULL, NULL, false)) {
1796                 exit(1);
1797         }
1798
1799         if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1800             && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1801                 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1802                 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1803                 exit(1);
1804         }
1805
1806         /* ...NOTE... Log files are working from this point! */
1807
1808         DEBUG(3,("loaded services\n"));
1809
1810         init_structs();
1811
1812         if (!profile_setup(msg_ctx, False)) {
1813                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1814                 return -1;
1815         }
1816
1817         if (profile_level != NULL) {
1818                 profiling_level = atoi(profile_level);
1819         } else {
1820                 profiling_level = lp_smbd_profiling_level();
1821         }
1822         main_server_id = messaging_server_id(msg_ctx);
1823         set_profile_level(profiling_level, &main_server_id);
1824
1825         if (!is_daemon && !is_a_socket(0)) {
1826                 if (!interactive) {
1827                         DEBUG(3, ("Standard input is not a socket, "
1828                                   "assuming -D option\n"));
1829                 }
1830
1831                 /*
1832                  * Setting is_daemon here prevents us from eventually calling
1833                  * the open_sockets_inetd()
1834                  */
1835
1836                 is_daemon = True;
1837         }
1838
1839         if (is_daemon && !interactive) {
1840                 DEBUG(3, ("Becoming a daemon.\n"));
1841                 become_daemon(Fork, no_process_group, log_stdout);
1842         }
1843
1844 #if HAVE_SETPGID
1845         /*
1846          * If we're interactive we want to set our own process group for
1847          * signal management.
1848          */
1849         if (interactive && !no_process_group)
1850                 setpgid( (pid_t)0, (pid_t)0);
1851 #endif
1852
1853         if (!directory_exist(lp_lock_directory()))
1854                 mkdir(lp_lock_directory(), 0755);
1855
1856         if (!directory_exist(lp_pid_directory()))
1857                 mkdir(lp_pid_directory(), 0755);
1858
1859         if (is_daemon)
1860                 pidfile_create(lp_pid_directory(), "smbd");
1861
1862         status = reinit_after_fork(msg_ctx, ev_ctx, false, NULL);
1863         if (!NT_STATUS_IS_OK(status)) {
1864                 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1865         }
1866
1867         if (!interactive) {
1868                 /*
1869                  * Do not initialize the parent-child-pipe before becoming a
1870                  * daemon: this is used to detect a died parent in the child
1871                  * process.
1872                  */
1873                 status = init_before_fork();
1874                 if (!NT_STATUS_IS_OK(status)) {
1875                         exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1876                 }
1877         }
1878
1879         parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1880         if (!parent) {
1881                 exit_server("talloc(struct smbd_parent_context) failed");
1882         }
1883         parent->interactive = interactive;
1884         parent->ev_ctx = ev_ctx;
1885         parent->msg_ctx = msg_ctx;
1886         am_parent = parent;
1887
1888         se = tevent_add_signal(parent->ev_ctx,
1889                                parent,
1890                                SIGTERM, 0,
1891                                smbd_parent_sig_term_handler,
1892                                parent);
1893         if (!se) {
1894                 exit_server("failed to setup SIGTERM handler");
1895         }
1896         se = tevent_add_signal(parent->ev_ctx,
1897                                parent,
1898                                SIGHUP, 0,
1899                                smbd_parent_sig_hup_handler,
1900                                parent);
1901         if (!se) {
1902                 exit_server("failed to setup SIGHUP handler");
1903         }
1904
1905         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1906
1907         if (smbd_memcache() == NULL) {
1908                 exit_daemon("no memcache available", EACCES);
1909         }
1910
1911         memcache_set_global(smbd_memcache());
1912
1913         /* Initialise the password backed before the global_sam_sid
1914            to ensure that we fetch from ldap before we make a domain sid up */
1915
1916         if(!initialize_password_db(false, ev_ctx))
1917                 exit(1);
1918
1919         if (!secrets_init()) {
1920                 exit_daemon("smbd can not open secrets.tdb", EACCES);
1921         }
1922
1923         if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1924                 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1925                 if (!open_schannel_session_store(NULL, lp_ctx)) {
1926                         exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1927                 }
1928                 TALLOC_FREE(lp_ctx);
1929         }
1930
1931         if(!get_global_sam_sid()) {
1932                 exit_daemon("Samba cannot create a SAM SID", EACCES);
1933         }
1934
1935         server_id = messaging_server_id(msg_ctx);
1936         status = smbXsrv_version_global_init(&server_id);
1937         if (!NT_STATUS_IS_OK(status)) {
1938                 exit_daemon("Samba cannot init server context", EACCES);
1939         }
1940
1941         status = smbXsrv_session_global_init(msg_ctx);
1942         if (!NT_STATUS_IS_OK(status)) {
1943                 exit_daemon("Samba cannot init session context", EACCES);
1944         }
1945
1946         status = smbXsrv_tcon_global_init();
1947         if (!NT_STATUS_IS_OK(status)) {
1948                 exit_daemon("Samba cannot init tcon context", EACCES);
1949         }
1950
1951         if (!locking_init())
1952                 exit_daemon("Samba cannot init locking", EACCES);
1953
1954         if (!leases_db_init(false)) {
1955                 exit_daemon("Samba cannot init leases", EACCES);
1956         }
1957
1958         if (!smbd_notifyd_init(msg_ctx, interactive, &parent->notifyd)) {
1959                 exit_daemon("Samba cannot init notification", EACCES);
1960         }
1961
1962         if (!cleanupd_init(msg_ctx, interactive, &parent->cleanupd)) {
1963                 exit_daemon("Samba cannot init the cleanupd", EACCES);
1964         }
1965
1966         if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
1967                 exit(1);
1968         }
1969
1970         if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1971                 exit_daemon("Samba cannot init scavenging", EACCES);
1972         }
1973
1974         if (!W_ERROR_IS_OK(registry_init_full()))
1975                 exit_daemon("Samba cannot init registry", EACCES);
1976
1977         /* Open the share_info.tdb here, so we don't have to open
1978            after the fork on every single connection.  This is a small
1979            performance improvment and reduces the total number of system
1980            fds used. */
1981         if (!share_info_db_init()) {
1982                 exit_daemon("ERROR: failed to load share info db.", EACCES);
1983         }
1984
1985         status = init_system_session_info();
1986         if (!NT_STATUS_IS_OK(status)) {
1987                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1988                           nt_errstr(status)));
1989                 return -1;
1990         }
1991
1992         if (!init_guest_info()) {
1993                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1994                 return -1;
1995         }
1996
1997         if (!file_init_global()) {
1998                 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1999                 return -1;
2000         }
2001         status = smbXsrv_open_global_init();
2002         if (!NT_STATUS_IS_OK(status)) {
2003                 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
2004         }
2005
2006         if (lp_clustering() && !lp_allow_unsafe_cluster_upgrade()) {
2007                 status = smbd_claim_version(msg_ctx, samba_version_string());
2008                 if (!NT_STATUS_IS_OK(status)) {
2009                         DBG_WARNING("Could not claim version: %s\n",
2010                                     nt_errstr(status));
2011                         return -1;
2012                 }
2013         }
2014
2015         /* This MUST be done before start_epmd() because otherwise
2016          * start_epmd() forks and races against dcesrv_ep_setup() to
2017          * call directory_create_or_exist() */
2018         if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
2019                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2020                           lp_ncalrpc_dir(), strerror(errno)));
2021                 return -1;
2022         }
2023
2024         np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
2025         if (!np_dir) {
2026                 DEBUG(0, ("%s: Out of memory\n", __location__));
2027                 return -1;
2028         }
2029
2030         if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
2031                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2032                           np_dir, strerror(errno)));
2033                 return -1;
2034         }
2035
2036         if (is_daemon && !interactive) {
2037                 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
2038                         start_epmd(ev_ctx, msg_ctx);
2039                 }
2040         }
2041
2042         if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
2043                 exit_daemon("Samba cannot setup ep pipe", EACCES);
2044         }
2045
2046         if (is_daemon && !interactive) {
2047                 daemon_ready("smbd");
2048         }
2049
2050         /* only start other daemons if we are running as a daemon
2051          * -- bad things will happen if smbd is launched via inetd
2052          *  and we fork a copy of ourselves here */
2053         if (is_daemon && !interactive) {
2054
2055                 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
2056                         start_lsasd(ev_ctx, msg_ctx);
2057                 }
2058
2059                 if (rpc_fss_daemon() == RPC_DAEMON_FORK) {
2060                         start_fssd(ev_ctx, msg_ctx);
2061                 }
2062
2063                 if (!lp__disable_spoolss() &&
2064                     (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2065                         bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
2066
2067                         if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
2068                                 exit_daemon("Samba failed to init printing subsystem", EACCES);
2069                         }
2070                 }
2071
2072 #ifdef WITH_SPOTLIGHT
2073                 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL) &&
2074                     (rpc_mdssd_daemon() == RPC_DAEMON_FORK)) {
2075                         start_mdssd(ev_ctx, msg_ctx);
2076                 }
2077 #endif
2078         } else if (!lp__disable_spoolss() &&
2079                    (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2080                 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
2081                         exit(1);
2082                 }
2083         }
2084
2085         if (!is_daemon) {
2086                 int sock;
2087
2088                 /* inetd mode */
2089                 TALLOC_FREE(frame);
2090
2091                 /* Started from inetd. fd 0 is the socket. */
2092                 /* We will abort gracefully when the client or remote system
2093                    goes away */
2094                 sock = dup(0);
2095
2096                 /* close stdin, stdout (if not logging to it), but not stderr */
2097                 close_low_fds(true, !debug_get_output_is_stdout(), false);
2098
2099 #ifdef HAVE_ATEXIT
2100                 atexit(killkids);
2101 #endif
2102
2103                 /* Stop zombies */
2104                 smbd_setup_sig_chld_handler(parent);
2105
2106                 smbd_process(ev_ctx, msg_ctx, sock, true);
2107
2108                 exit_server_cleanly(NULL);
2109                 return(0);
2110         }
2111
2112         if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
2113                 exit_server("open_sockets_smbd() failed");
2114
2115         /* do a printer update now that all messaging has been set up,
2116          * before we allow clients to start connecting */
2117         if (!lp__disable_spoolss() &&
2118             (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2119                 printing_subsystem_update(ev_ctx, msg_ctx, false);
2120         }
2121
2122         TALLOC_FREE(frame);
2123         /* make sure we always have a valid stackframe */
2124         frame = talloc_stackframe();
2125
2126         if (!Fork) {
2127                 /* if we are running in the foreground then look for
2128                    EOF on stdin, and exit if it happens. This allows
2129                    us to die if the parent process dies
2130                    Only do this on a pipe or socket, no other device.
2131                 */
2132                 struct stat st;
2133                 if (fstat(0, &st) != 0) {
2134                         return false;
2135                 }
2136                 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
2137                         tevent_add_fd(ev_ctx,
2138                                         parent,
2139                                         0,
2140                                         TEVENT_FD_READ,
2141                                         smbd_stdin_handler,
2142                                         NULL);
2143                 }
2144         }
2145
2146         smbd_parent_loop(ev_ctx, parent);
2147
2148         exit_server_cleanly(NULL);
2149         TALLOC_FREE(frame);
2150         return(0);
2151 }