7a139afa476c45027968d255805e72cc478bc603
[tprouty/samba.git] / source / 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) James Peach                    2007
8    
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 2 of the License, or
12    (at your option) any later version.
13    
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18    
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "includes.h"
25
26 static_decl_rpc;
27
28 static int am_parent = 1;
29
30 /* the last message the was processed */
31 int last_message = -1;
32
33 /* a useful macro to debug the last message processed */
34 #define LAST_MESSAGE() smb_fn_name(last_message)
35
36 extern struct auth_context *negprot_global_auth_context;
37 extern pstring user_socket_options;
38 extern SIG_ATOMIC_T got_sig_term;
39 extern SIG_ATOMIC_T reload_after_sighup;
40 static SIG_ATOMIC_T got_sig_cld;
41
42 #ifdef WITH_DFS
43 extern int dcelogin_atmost_once;
44 #endif /* WITH_DFS */
45
46 /* really we should have a top level context structure that has the
47    client file descriptor as an element. That would require a major rewrite :(
48
49    the following 2 functions are an alternative - they make the file
50    descriptor private to smbd
51  */
52 static int server_fd = -1;
53
54 int smbd_server_fd(void)
55 {
56         return server_fd;
57 }
58
59 static void smbd_set_server_fd(int fd)
60 {
61         server_fd = fd;
62         client_setfd(fd);
63 }
64
65 struct event_context *smbd_event_context(void)
66 {
67         static struct event_context *ctx;
68
69         if (!ctx && !(ctx = event_context_init(NULL))) {
70                 smb_panic("Could not init smbd event context\n");
71         }
72         return ctx;
73 }
74
75 struct messaging_context *smbd_messaging_context(void)
76 {
77         static struct messaging_context *ctx;
78
79         if (!ctx && !(ctx = messaging_init(NULL, server_id_self(),
80                                            smbd_event_context()))) {
81                 smb_panic("Could not init smbd messaging context\n");
82         }
83         return ctx;
84 }
85
86 /*******************************************************************
87  What to do when smb.conf is updated.
88  ********************************************************************/
89
90 static void smb_conf_updated(struct messaging_context *msg,
91                              void *private_data,
92                              uint32_t msg_type,
93                              struct server_id server_id,
94                              DATA_BLOB *data)
95 {
96         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
97                   "updated. Reloading.\n"));
98         reload_services(False);
99 }
100
101
102 /*******************************************************************
103  Delete a statcache entry.
104  ********************************************************************/
105
106 static void smb_stat_cache_delete(struct messaging_context *msg,
107                                   void *private_data,
108                                   uint32_t msg_tnype,
109                                   struct server_id server_id,
110                                   DATA_BLOB *data)
111 {
112         const char *name = (const char *)data->data;
113         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
114         stat_cache_delete(name);
115 }
116
117 /****************************************************************************
118  Terminate signal.
119 ****************************************************************************/
120
121 static void sig_term(void)
122 {
123         got_sig_term = 1;
124         sys_select_signal(SIGTERM);
125 }
126
127 /****************************************************************************
128  Catch a sighup.
129 ****************************************************************************/
130
131 static void sig_hup(int sig)
132 {
133         reload_after_sighup = 1;
134         sys_select_signal(SIGHUP);
135 }
136
137 /****************************************************************************
138  Catch a sigcld
139 ****************************************************************************/
140 static void sig_cld(int sig)
141 {
142         got_sig_cld = 1;
143         sys_select_signal(SIGCLD);
144 }
145
146 /****************************************************************************
147   Send a SIGTERM to our process group.
148 *****************************************************************************/
149
150 static void  killkids(void)
151 {
152         if(am_parent) kill(0,SIGTERM);
153 }
154
155 /****************************************************************************
156  Process a sam sync message - not sure whether to do this here or
157  somewhere else.
158 ****************************************************************************/
159
160 static void msg_sam_sync(struct messaging_context *msg,
161                          void *private_data,
162                          uint32_t msg_type,
163                          struct server_id server_id,
164                          DATA_BLOB *data)
165 {
166         DEBUG(10, ("** sam sync message received, ignoring\n"));
167 }
168
169 /****************************************************************************
170  Process a sam sync replicate message - not sure whether to do this here or
171  somewhere else.
172 ****************************************************************************/
173
174 static void msg_sam_repl(struct messaging_context *msg,
175                          void *private_data,
176                          uint32_t msg_type,
177                          struct server_id server_id,
178                          DATA_BLOB *data)
179 {
180         uint32 low_serial;
181
182         if (data->length != sizeof(low_serial))
183                 return;
184
185         low_serial = *((uint32 *)data->data);
186
187         DEBUG(3, ("received sam replication message, serial = 0x%04x\n",
188                   low_serial));
189 }
190
191 /****************************************************************************
192  Open the socket communication - inetd.
193 ****************************************************************************/
194
195 static BOOL open_sockets_inetd(void)
196 {
197         /* Started from inetd. fd 0 is the socket. */
198         /* We will abort gracefully when the client or remote system 
199            goes away */
200         smbd_set_server_fd(dup(0));
201         
202         /* close our standard file descriptors */
203         close_low_fds(False); /* Don't close stderr */
204         
205         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
206         set_socket_options(smbd_server_fd(), user_socket_options);
207
208         return True;
209 }
210
211 static void msg_exit_server(struct messaging_context *msg,
212                             void *private_data,
213                             uint32_t msg_type,
214                             struct server_id server_id,
215                             DATA_BLOB *data)
216 {
217         DEBUG(3, ("got a SHUTDOWN message\n"));
218         exit_server_cleanly(NULL);
219 }
220
221 #ifdef DEVELOPER
222 static void msg_inject_fault(struct messaging_context *msg,
223                              void *private_data,
224                              uint32_t msg_type,
225                              struct server_id src,
226                              DATA_BLOB *data)
227 {
228         int sig;
229
230         if (data->length != sizeof(sig)) {
231                 
232                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
233                           procid_str_static(&src)));
234                 return;
235         }
236
237         sig = *(int *)data->data;
238         if (sig == -1) {
239                 exit_server("internal error injected");
240                 return;
241         }
242
243 #if HAVE_STRSIGNAL
244         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
245                   procid_str_static(&src), sig, strsignal(sig)));
246 #else
247         DEBUG(0, ("Process %s requested injection of signal %d\n",
248                   procid_str_static(&src), sig));
249 #endif
250
251         kill(sys_getpid(), sig);
252 }
253 #endif /* DEVELOPER */
254
255 struct child_pid {
256         struct child_pid *prev, *next;
257         pid_t pid;
258 };
259
260 static struct child_pid *children;
261 static int num_children;
262
263 static void add_child_pid(pid_t pid)
264 {
265         struct child_pid *child;
266
267         if (lp_max_smbd_processes() == 0) {
268                 /* Don't bother with the child list if we don't care anyway */
269                 return;
270         }
271
272         child = SMB_MALLOC_P(struct child_pid);
273         if (child == NULL) {
274                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
275                 return;
276         }
277         child->pid = pid;
278         DLIST_ADD(children, child);
279         num_children += 1;
280 }
281
282 static void remove_child_pid(pid_t pid)
283 {
284         struct child_pid *child;
285
286         if (lp_max_smbd_processes() == 0) {
287                 /* Don't bother with the child list if we don't care anyway */
288                 return;
289         }
290
291         for (child = children; child != NULL; child = child->next) {
292                 if (child->pid == pid) {
293                         struct child_pid *tmp = child;
294                         DLIST_REMOVE(children, child);
295                         SAFE_FREE(tmp);
296                         num_children -= 1;
297                         return;
298                 }
299         }
300
301         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
302 }
303
304 /****************************************************************************
305  Have we reached the process limit ?
306 ****************************************************************************/
307
308 static BOOL allowable_number_of_smbd_processes(void)
309 {
310         int max_processes = lp_max_smbd_processes();
311
312         if (!max_processes)
313                 return True;
314
315         return num_children < max_processes;
316 }
317
318 /****************************************************************************
319  Open the socket communication.
320 ****************************************************************************/
321
322 static BOOL open_sockets_smbd(enum smb_server_mode server_mode, const char *smb_ports)
323 {
324         int num_sockets = 0;
325         int fd_listenset[FD_SETSIZE];
326         fd_set listen_set;
327         int s;
328         int maxfd = 0;
329         int i;
330         struct timeval idle_timeout = timeval_zero();
331
332         if (server_mode == SERVER_MODE_INETD) {
333                 return open_sockets_inetd();
334         }
335
336 #ifdef HAVE_ATEXIT
337         {
338                 static int atexit_set;
339                 if(atexit_set == 0) {
340                         atexit_set=1;
341                         atexit(killkids);
342                 }
343         }
344 #endif
345
346         /* Stop zombies */
347         CatchSignal(SIGCLD, sig_cld);
348
349         FD_ZERO(&listen_set);
350
351         /* At this point, it doesn't matter what daemon mode we are in, we
352          * need some sockets to listen on.
353          */
354         num_sockets = smbd_sockinit(smb_ports, fd_listenset, &idle_timeout);
355         if (num_sockets == 0) {
356                 return False;
357         }
358
359         for (i = 0; i < num_sockets; ++i) {
360                 FD_SET(fd_listenset[i], &listen_set);
361                 maxfd = MAX(maxfd, fd_listenset[i]);
362         }
363
364         /* Listen to messages */
365
366         messaging_register(smbd_messaging_context(), NULL,
367                            MSG_SMB_SAM_SYNC, msg_sam_sync);
368         messaging_register(smbd_messaging_context(), NULL,
369                            MSG_SMB_SAM_REPL, msg_sam_repl);
370         messaging_register(smbd_messaging_context(), NULL,
371                            MSG_SHUTDOWN, msg_exit_server);
372         messaging_register(smbd_messaging_context(), NULL,
373                            MSG_SMB_FILE_RENAME, msg_file_was_renamed);
374         messaging_register(smbd_messaging_context(), NULL,
375                            MSG_SMB_CONF_UPDATED, smb_conf_updated); 
376         messaging_register(smbd_messaging_context(), NULL,
377                            MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
378
379 #ifdef DEVELOPER
380         messaging_register(smbd_messaging_context(), NULL,
381                            MSG_SMB_INJECT_FAULT, msg_inject_fault);
382 #endif
383
384         /* now accept incoming connections - forking a new process
385            for each incoming connection */
386         DEBUG(2,("waiting for a connection\n"));
387         while (1) {
388                 fd_set lfds;
389                 int num;
390                 
391                 /* Free up temporary memory from the main smbd. */
392                 lp_TALLOC_FREE();
393
394                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
395                 message_dispatch();
396
397                 if (got_sig_cld) {
398                         pid_t pid;
399                         got_sig_cld = False;
400
401                         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
402                                 remove_child_pid(pid);
403                         }
404                 }
405
406                 memcpy((char *)&lfds, (char *)&listen_set, 
407                        sizeof(listen_set));
408
409                 num = sys_select(maxfd+1,&lfds,NULL,NULL,
410                                  timeval_is_zero(&idle_timeout) ?
411                                  NULL : &idle_timeout);
412                 
413                 if (num == -1 && errno == EINTR) {
414                         if (got_sig_term) {
415                                 exit_server_cleanly(NULL);
416                         }
417
418                         /* check for sighup processing */
419                         if (reload_after_sighup) {
420                                 change_to_root_user();
421                                 DEBUG(1,("Reloading services after SIGHUP\n"));
422                                 reload_services(False);
423                                 reload_after_sighup = 0;
424                         }
425
426                         continue;
427                 }
428
429                 /* If the idle timeout fired and we don't have any connected
430                  * users, exit gracefully. We should be running under a process
431                  * controller that will restart us if necessry.
432                  */
433                 if (num == 0 && count_all_current_connections() == 0) {
434                         exit_server_cleanly("idle timeout");
435                 }
436
437                 /* check if we need to reload services */
438                 check_reload(time(NULL));
439
440                 /* Find the sockets that are read-ready -
441                    accept on these. */
442                 for( ; num > 0; num--) {
443                         struct sockaddr addr;
444                         socklen_t in_addrlen = sizeof(addr);
445                         pid_t child = 0;
446
447                         s = -1;
448                         for(i = 0; i < num_sockets; i++) {
449                                 if(FD_ISSET(fd_listenset[i],&lfds)) {
450                                         s = fd_listenset[i];
451                                         /* Clear this so we don't look
452                                            at it again. */
453                                         FD_CLR(fd_listenset[i],&lfds);
454                                         break;
455                                 }
456                         }
457
458                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
459                         
460                         if (smbd_server_fd() == -1 && errno == EINTR)
461                                 continue;
462                         
463                         if (smbd_server_fd() == -1) {
464                                 DEBUG(0,("open_sockets_smbd: accept: %s\n",
465                                          strerror(errno)));
466                                 continue;
467                         }
468
469                         /* Ensure child is set to blocking mode */
470                         set_blocking(smbd_server_fd(),True);
471
472                         /* In interactive mode, return with a connected socket.
473                          * Foreground and daemon modes should fork worker
474                          * processes.
475                          */
476                         if (server_mode == SERVER_MODE_INTERACTIVE) {
477                                 return True;
478                         }
479                         
480                         if (allowable_number_of_smbd_processes() &&
481                             smbd_server_fd() != -1 &&
482                             ((child = sys_fork())==0)) {
483                                 /* Child code ... */
484
485                                 /* Stop zombies, the parent explicitly handles
486                                  * them, counting worker smbds. */
487                                 CatchChild();
488                                 
489                                 /* close the listening socket(s) */
490                                 for(i = 0; i < num_sockets; i++)
491                                         close(fd_listenset[i]);
492                                 
493                                 /* close our standard file
494                                    descriptors */
495                                 close_low_fds(False);
496                                 am_parent = 0;
497                                 
498                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
499                                 set_socket_options(smbd_server_fd(),user_socket_options);
500                                 
501                                 /* this is needed so that we get decent entries
502                                    in smbstatus for port 445 connects */
503                                 set_remote_machine_name(get_peer_addr(smbd_server_fd()),
504                                                         False);
505                                 
506                                 /* Reset the state of the random
507                                  * number generation system, so
508                                  * children do not get the same random
509                                  * numbers as each other */
510
511                                 set_need_random_reseed();
512                                 /* tdb needs special fork handling - remove
513                                  * CLEAR_IF_FIRST flags */
514                                 if (tdb_reopen_all(1) == -1) {
515                                         DEBUG(0,("tdb_reopen_all failed.\n"));
516                                         smb_panic("tdb_reopen_all failed.");
517                                 }
518
519                                 return True; 
520                         }
521                         /* The parent doesn't need this socket */
522                         close(smbd_server_fd()); 
523
524                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
525                                 Clear the closed fd info out of server_fd --
526                                 and more importantly, out of client_fd in
527                                 util_sock.c, to avoid a possible
528                                 getpeername failure if we reopen the logs
529                                 and use %I in the filename.
530                         */
531
532                         smbd_set_server_fd(-1);
533
534                         if (child != 0) {
535                                 add_child_pid(child);
536                         }
537
538                         /* Force parent to check log size after
539                          * spawning child.  Fix from
540                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
541                          * parent smbd will log to logserver.smb.  It
542                          * writes only two messages for each child
543                          * started/finished. But each child writes,
544                          * say, 50 messages also in logserver.smb,
545                          * begining with the debug_count of the
546                          * parent, before the child opens its own log
547                          * file logserver.client. In a worst case
548                          * scenario the size of logserver.smb would be
549                          * checked after about 50*50=2500 messages
550                          * (ca. 100kb).
551                          * */
552                         force_check_log_size();
553  
554                 } /* end for num */
555         } /* end while 1 */
556
557 /* NOTREACHED   return True; */
558 }
559
560 /****************************************************************************
561  Reload printers
562 **************************************************************************/
563 void reload_printers(void)
564 {
565         int snum;
566         int n_services = lp_numservices();
567         int pnum = lp_servicenumber(PRINTERS_NAME);
568         const char *pname;
569
570         pcap_cache_reload();
571
572         /* remove stale printers */
573         for (snum = 0; snum < n_services; snum++) {
574                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
575                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
576                                       lp_autoloaded(snum)))
577                         continue;
578
579                 pname = lp_printername(snum);
580                 if (!pcap_printername_ok(pname)) {
581                         DEBUG(3, ("removing stale printer %s\n", pname));
582
583                         if (is_printer_published(NULL, snum, NULL))
584                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
585                         del_a_printer(pname);
586                         lp_killservice(snum);
587                 }
588         }
589
590         load_printers();
591 }
592
593 /****************************************************************************
594  Reload the services file.
595 **************************************************************************/
596
597 BOOL reload_services(BOOL test)
598 {
599         BOOL ret;
600         
601         if (lp_loaded()) {
602                 pstring fname;
603                 pstrcpy(fname,lp_configfile());
604                 if (file_exist(fname, NULL) &&
605                     !strcsequal(fname, dyn_CONFIGFILE)) {
606                         pstrcpy(dyn_CONFIGFILE, fname);
607                         test = False;
608                 }
609         }
610
611         reopen_logs();
612
613         if (test && !lp_file_list_changed())
614                 return(True);
615
616         lp_killunused(conn_snum_used);
617
618         ret = lp_load(dyn_CONFIGFILE, False, False, True, True);
619
620         reload_printers();
621
622         /* perhaps the config filename is now set */
623         if (!test)
624                 reload_services(True);
625
626         reopen_logs();
627
628         load_interfaces();
629
630         if (smbd_server_fd() != -1) {      
631                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
632                 set_socket_options(smbd_server_fd(), user_socket_options);
633         }
634
635         mangle_reset_cache();
636         reset_stat_cache();
637
638         /* this forces service parameters to be flushed */
639         set_current_service(NULL,0,True);
640
641         return(ret);
642 }
643
644 /****************************************************************************
645  Exit the server.
646 ****************************************************************************/
647
648 /* Reasons for shutting down a server process. */
649 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
650
651 static void exit_server_common(enum server_exit_reason how,
652         const char *const reason) NORETURN_ATTRIBUTE;
653
654 static void exit_server_common(enum server_exit_reason how,
655         const char *const reason)
656 {
657         static int firsttime=1;
658
659         if (!firsttime)
660                 exit(0);
661         firsttime = 0;
662
663         change_to_root_user();
664
665         if (negprot_global_auth_context) {
666                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
667         }
668
669         conn_close_all();
670
671         invalidate_all_vuids();
672
673         /* 3 second timeout. */
674         print_notify_send_messages(smbd_messaging_context(), 3);
675
676         /* delete our entry in the connections database. */
677         yield_connection(NULL,"");
678
679         respond_to_all_remaining_local_messages();
680
681 #ifdef WITH_DFS
682         if (dcelogin_atmost_once) {
683                 dfs_unlogin();
684         }
685 #endif
686
687         locking_end();
688         printing_end();
689
690         server_encryption_shutdown();
691
692         if (how != SERVER_EXIT_NORMAL) {
693                 int oldlevel = DEBUGLEVEL;
694                 char *last_inbuf = get_InBuffer();
695
696                 DEBUGLEVEL = 10;
697
698                 DEBUGSEP(0);
699                 DEBUG(0,("Abnormal server exit: %s\n",
700                         reason ? reason : "no explanation provided"));
701                 DEBUGSEP(0);
702
703                 log_stack_trace();
704                 if (last_inbuf) {
705                         DEBUG(0,("Last message was %s\n", LAST_MESSAGE()));
706                         show_msg(last_inbuf);
707                 }
708
709                 DEBUGLEVEL = oldlevel;
710                 dump_core();
711
712         } else {    
713                 DEBUG(3,("Server exit (%s)\n",
714                         (reason ? reason : "normal exit")));
715         }
716
717         exit(0);
718 }
719
720 void exit_server(const char *const explanation)
721 {
722         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
723 }
724
725 void exit_server_cleanly(const char *const explanation)
726 {
727         exit_server_common(SERVER_EXIT_NORMAL, explanation);
728 }
729
730 void exit_server_fault(void)
731 {
732         exit_server("critical server fault");
733 }
734
735 /****************************************************************************
736  Initialise connect, service and file structs.
737 ****************************************************************************/
738
739 static BOOL init_structs(void )
740 {
741         /*
742          * Set the machine NETBIOS name if not already
743          * set from the config file.
744          */
745
746         if (!init_names())
747                 return False;
748
749         conn_init();
750
751         file_init();
752
753         /* for RPC pipes */
754         init_rpc_pipe_hnd();
755
756         init_dptrs();
757
758         secrets_init();
759
760         return True;
761 }
762
763 /*
764  * Send keepalive packets to our client
765  */
766 static BOOL keepalive_fn(const struct timeval *now, void *private_data)
767 {
768         if (!send_keepalive(smbd_server_fd())) {
769                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
770                 return False;
771         }
772         return True;
773 }
774
775 /*
776  * Do the recurring check if we're idle
777  */
778 static BOOL deadtime_fn(const struct timeval *now, void *private_data)
779 {
780         if ((conn_num_open() == 0)
781             || (conn_idle_all(now->tv_sec))) {
782                 DEBUG( 2, ( "Closing idle connection\n" ) );
783                 messaging_send(smbd_messaging_context(), procid_self(),
784                                MSG_SHUTDOWN, &data_blob_null);
785                 return False;
786         }
787
788         return True;
789 }
790
791
792 /****************************************************************************
793  main program.
794 ****************************************************************************/
795
796 /* Declare prototype for build_options() to avoid having to run it through
797    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
798    prototype generation system is too complicated. */
799
800 extern void build_options(BOOL screen);
801
802  int main(int argc,const char *argv[])
803 {
804         /* shall I run as a daemon */
805         BOOL no_process_group = False;
806         BOOL log_stdout = False;
807         const char *ports = NULL;
808         const char *profile_level = NULL;
809         int opt;
810         poptContext pc;
811
812         enum smb_server_mode server_mode = SERVER_MODE_DAEMON;
813
814         struct poptOption long_options[] = {
815         POPT_AUTOHELP
816         {"daemon", 'D', POPT_ARG_VAL, &server_mode, SERVER_MODE_DAEMON,
817                 "Become a daemon (default)" },
818         {"interactive", 'i', POPT_ARG_VAL, &server_mode, SERVER_MODE_INTERACTIVE,
819                 "Run interactive (not a daemon)"},
820         {"foreground", 'F', POPT_ARG_VAL, &server_mode, SERVER_MODE_FOREGROUND,
821                 "Run daemon in foreground (for daemontools, etc.)" },
822         {"no-process-group", '\0', POPT_ARG_VAL, &no_process_group, True,
823                 "Don't create a new process group" },
824         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
825         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
826         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
827         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
828         POPT_COMMON_SAMBA
829         POPT_COMMON_DYNCONFIG
830         POPT_TABLEEND
831         };
832
833         load_case_tables();
834
835         TimeInit();
836
837 #ifdef HAVE_SET_AUTH_PARAMETERS
838         set_auth_parameters(argc,argv);
839 #endif
840
841         pc = poptGetContext("smbd", argc, argv, long_options, 0);
842         
843         while((opt = poptGetNextOpt(pc)) != -1) {
844                 switch (opt)  {
845                 case 'b':
846                         build_options(True); /* Display output to screen as well as debug */ 
847                         exit(0);
848                         break;
849                 }
850         }
851
852         poptFreeContext(pc);
853
854 #ifdef HAVE_SETLUID
855         /* needed for SecureWare on SCO */
856         setluid(0);
857 #endif
858
859         sec_init();
860
861         set_remote_machine_name("smbd", False);
862
863         if (server_mode == SERVER_MODE_INTERACTIVE) {
864                 log_stdout = True;
865                 if (DEBUGLEVEL >= 9) {
866                         talloc_enable_leak_report();
867                 }
868         }
869
870         if (log_stdout && server_mode == SERVER_MODE_DAEMON) {
871                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
872                 exit(1);
873         }
874
875         setup_logging(argv[0],log_stdout);
876
877         /* we want to re-seed early to prevent time delays causing
878            client problems at a later date. (tridge) */
879         generate_random_buffer(NULL, 0);
880
881         /* make absolutely sure we run as root - to handle cases where people
882            are crazy enough to have it setuid */
883
884         gain_root_privilege();
885         gain_root_group_privilege();
886
887         fault_setup((void (*)(void *))exit_server_fault);
888         dump_core_setup("smbd");
889
890         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
891         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
892         
893         /* we are never interested in SIGPIPE */
894         BlockSignals(True,SIGPIPE);
895
896 #if defined(SIGFPE)
897         /* we are never interested in SIGFPE */
898         BlockSignals(True,SIGFPE);
899 #endif
900
901 #if defined(SIGUSR2)
902         /* We are no longer interested in USR2 */
903         BlockSignals(True,SIGUSR2);
904 #endif
905
906         /* POSIX demands that signals are inherited. If the invoking process has
907          * these signals masked, we will have problems, as we won't recieve them. */
908         BlockSignals(False, SIGHUP);
909         BlockSignals(False, SIGUSR1);
910         BlockSignals(False, SIGTERM);
911
912         /* we want total control over the permissions on created files,
913            so set our umask to 0 */
914         umask(0);
915
916         init_sec_ctx();
917
918         reopen_logs();
919
920         DEBUG(0,( "smbd version %s started.\n", SAMBA_VERSION_STRING));
921         DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
922
923         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
924                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
925
926         /* Output the build options to the debug log */ 
927         build_options(False);
928
929         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
930                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
931                 exit(1);
932         }
933
934         /*
935          * Do this before reload_services.
936          */
937
938         if (!reload_services(False))
939                 return(-1);     
940
941         init_structs();
942
943 #ifdef WITH_PROFILE
944         if (!profile_setup(smbd_messaging_context(), False)) {
945                 DEBUG(0,("ERROR: failed to setup profiling\n"));
946                 return -1;
947         }
948         if (profile_level != NULL) {
949                 int pl = atoi(profile_level);
950                 struct server_id src;
951
952                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
953                 src.pid = getpid();
954                 set_profile_level(pl, src);
955         }
956 #endif
957
958         DEBUG(3,( "loaded services\n"));
959
960         if (is_a_socket(0)) {
961                 if (server_mode == SERVER_MODE_DAEMON) {
962                         DEBUG(0,("standard input is a socket, "
963                                     "assuming -F option\n"));
964                 }
965                 server_mode = SERVER_MODE_INETD;
966         }
967
968         if (server_mode == SERVER_MODE_DAEMON) {
969                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
970                 become_daemon(True, no_process_group);
971         } else if (server_mode == SERVER_MODE_FOREGROUND) {
972                 become_daemon(False, no_process_group);
973         }
974
975 #if HAVE_SETPGID
976         /*
977          * If we're interactive we want to set our own process group for
978          * signal management.
979          */
980         if (server_mode == SERVER_MODE_INTERACTIVE && !no_process_group) {
981                 setpgid( (pid_t)0, (pid_t)0);
982         }
983 #endif
984
985         if (!directory_exist(lp_lockdir(), NULL))
986                 mkdir(lp_lockdir(), 0755);
987
988         if (server_mode != SERVER_MODE_INETD &&
989             server_mode != SERVER_MODE_INTERACTIVE) {
990                 pidfile_create("smbd");
991         }
992
993         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
994         if (smbd_messaging_context() == NULL)
995                 exit(1);
996
997         /* Initialise the password backed before the global_sam_sid
998            to ensure that we fetch from ldap before we make a domain sid up */
999
1000         if(!initialize_password_db(False, smbd_event_context()))
1001                 exit(1);
1002
1003         if (!secrets_init()) {
1004                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1005                 exit(1);
1006         }
1007
1008         if(!get_global_sam_sid()) {
1009                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1010                 exit(1);
1011         }
1012
1013         if (!session_init())
1014                 exit(1);
1015
1016         if (!connections_init(True))
1017                 exit(1);
1018
1019         if (!locking_init(0))
1020                 exit(1);
1021
1022         namecache_enable();
1023
1024         if (!init_registry())
1025                 exit(1);
1026
1027 #if 0
1028         if (!init_svcctl_db())
1029                 exit(1);
1030 #endif
1031
1032         if (!print_backend_init(smbd_messaging_context()))
1033                 exit(1);
1034
1035         if (!init_guest_info()) {
1036                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1037                 return -1;
1038         }
1039
1040         /* Setup the main smbd so that we can get messages. */
1041         /* don't worry about general printing messages here */
1042
1043         claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD);
1044
1045         /* only start the background queue daemon if we are 
1046            running as a daemon -- bad things will happen if
1047            smbd is launched via inetd and we fork a copy of 
1048            ourselves here */
1049         if (server_mode != SERVER_MODE_INETD &&
1050             server_mode != SERVER_MODE_INTERACTIVE) {
1051                 start_background_queue(); 
1052         }
1053
1054         /* Always attempt to initialize DMAPI. We will only use it later if
1055          * lp_dmapi_support is set on the share, but we need a single global
1056          * session to work with.
1057          */
1058         dmapi_init_session();
1059
1060         if (!open_sockets_smbd(server_mode, ports)) {
1061                 exit(1);
1062         }
1063
1064         /*
1065          * everything after this point is run after the fork()
1066          */ 
1067
1068         static_init_rpc;
1069
1070         init_modules();
1071
1072         /* Possibly reload the services file. Only worth doing in
1073          * daemon mode. In inetd mode, we know we only just loaded this.
1074          */
1075         if (server_mode != SERVER_MODE_INETD &&
1076             server_mode != SERVER_MODE_INTERACTIVE) {
1077                 reload_services(True);
1078         }
1079
1080         if (!init_account_policy()) {
1081                 DEBUG(0,("Could not open account policy tdb.\n"));
1082                 exit(1);
1083         }
1084
1085         if (*lp_rootdir()) {
1086                 if (sys_chroot(lp_rootdir()) == 0)
1087                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1088         }
1089
1090         /* Setup oplocks */
1091         if (!init_oplocks(smbd_messaging_context()))
1092                 exit(1);
1093         
1094         /* Setup aio signal handler. */
1095         initialize_async_io_handler();
1096
1097         /* register our message handlers */
1098         messaging_register(smbd_messaging_context(), NULL,
1099                            MSG_SMB_FORCE_TDIS, msg_force_tdis);
1100
1101         if ((lp_keepalive() != 0)
1102             && !(event_add_idle(smbd_event_context(), NULL,
1103                                 timeval_set(lp_keepalive(), 0),
1104                                 "keepalive", keepalive_fn,
1105                                 NULL))) {
1106                 DEBUG(0, ("Could not add keepalive event\n"));
1107                 exit(1);
1108         }
1109
1110         if (!(event_add_idle(smbd_event_context(), NULL,
1111                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1112                              "deadtime", deadtime_fn, NULL))) {
1113                 DEBUG(0, ("Could not add deadtime event\n"));
1114                 exit(1);
1115         }
1116
1117         smbd_process();
1118
1119         namecache_shutdown();
1120
1121         exit_server_cleanly(NULL);
1122         return(0);
1123 }