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Date:: Fri Feb 11 13:52:37 2005 UTC
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1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001-2005 by Alexander Barton (alex@barton.de)
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  * Please read the file COPYING, README and AUTHORS for more information.
10  *
11  * Main program -- main()
12  */
13 
14 
15 #include "portab.h"
16 
17 static char UNUSED id[] = "$Id: ngircd.c,v 1.94 2005/02/11 13:52:37 alex Exp $";
18 
19 #include "imp.h"
20 #include <assert.h>
21 #include <errno.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <signal.h>
25 #include <string.h>
26 #include <unistd.h>
27 #include <time.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <sys/wait.h>
31 #include <fcntl.h>
32 #include <pwd.h>
33 #include <grp.h>
34 
35 #include "defines.h"
36 #include "resolve.h"
37 #include "conn.h"
38 #include "client.h"
39 #include "channel.h"
40 #include "conf.h"
41 #include "cvs-version.h"
42 #include "lists.h"
43 #include "log.h"
44 #include "parse.h"
45 #include "irc.h"
46 
47 #ifdef RENDEZVOUS
48 #include "rendezvous.h"
49 #endif
50 
51 #include "exp.h"
52 #include "ngircd.h"
53 
54 
55 LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
56 LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
57 
58 LOCAL VOID Show_Version PARAMS(( VOID ));
59 LOCAL VOID Show_Help PARAMS(( VOID ));
60 
61 LOCAL VOID Pidfile_Create PARAMS(( LONG ));
62 LOCAL VOID Pidfile_Delete PARAMS(( VOID ));
63 
64 LOCAL VOID Fill_Version PARAMS(( VOID ));
65 
66 LOCAL VOID Setup_FDStreams PARAMS(( VOID ));
67 
68 
69 GLOBAL int
70 main( int argc, const char *argv[] )
71 {
72 	struct passwd *pwd;
73 	struct group *grp;
74 	BOOLEAN ok, configtest = FALSE;
75 	LONG pid, n;
76 	INT i;
77 
78 	umask( 0077 );
79 
80 	NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE;
81 	NGIRCd_NoDaemon = NGIRCd_Passive = FALSE;
82 #ifdef DEBUG
83 	NGIRCd_Debug = FALSE;
84 #endif
85 #ifdef SNIFFER
86 	NGIRCd_Sniffer = FALSE;
87 #endif
88 	strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
89 	strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
90 
91 	Fill_Version( );
92 
93 	/* Kommandozeile parsen */
94 	for( i = 1; i < argc; i++ )
95 	{
96 		ok = FALSE;
97 		if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
98 		{
99 			/* Lange Option */
100 
101 			if( strcmp( argv[i], "--config" ) == 0 )
102 			{
103 				if( i + 1 < argc )
104 				{
105 					/* Ok, there's an parameter left */
106 					strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
107 
108 					/* next parameter */
109 					i++; ok = TRUE;
110 				}
111 			}
112 			if( strcmp( argv[i], "--configtest" ) == 0 )
113 			{
114 				configtest = TRUE;
115 				ok = TRUE;
116 			}
117 #ifdef DEBUG
118 			if( strcmp( argv[i], "--debug" ) == 0 )
119 			{
120 				NGIRCd_Debug = TRUE;
121 				ok = TRUE;
122 			}
123 #endif
124 			if( strcmp( argv[i], "--help" ) == 0 )
125 			{
126 				Show_Version( );
127 				puts( "" ); Show_Help( ); puts( "" );
128 				exit( 1 );
129 			}
130 			if( strcmp( argv[i], "--nodaemon" ) == 0 )
131 			{
132 				NGIRCd_NoDaemon = TRUE;
133 				ok = TRUE;
134 			}
135 			if( strcmp( argv[i], "--passive" ) == 0 )
136 			{
137 				NGIRCd_Passive = TRUE;
138 				ok = TRUE;
139 			}
140 #ifdef SNIFFER
141 			if( strcmp( argv[i], "--sniffer" ) == 0 )
142 			{
143 				NGIRCd_Sniffer = TRUE;
144 				ok = TRUE;
145 			}
146 #endif
147 			if( strcmp( argv[i], "--version" ) == 0 )
148 			{
149 				Show_Version( );
150 				exit( 1 );
151 			}
152 		}
153 		else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
154 		{
155 			/* Kurze Option */
156 			
157 			for( n = 1; n < (LONG)strlen( argv[i] ); n++ )
158 			{
159 				ok = FALSE;
160 #ifdef DEBUG
161 				if( argv[i][n] == 'd' )
162 				{
163 					NGIRCd_Debug = TRUE;
164 					ok = TRUE;
165 				}
166 #endif
167 				if( argv[i][n] == 'f' )
168 				{
169 					if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
170 					{
171 						/* Ok, next character is a blank */
172 						strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
173 
174 						/* go to the following parameter */
175 						i++; n = (LONG)strlen( argv[i] );
176 						ok = TRUE;
177 					}
178 				}
179 				if( argv[i][n] == 'n' )
180 				{
181 					NGIRCd_NoDaemon = TRUE;
182 					ok = TRUE;
183 				}
184 				if( argv[i][n] == 'p' )
185 				{
186 					NGIRCd_Passive = TRUE;
187 					ok = TRUE;
188 				}
189 #ifdef SNIFFER
190 				if( argv[i][n] == 's' )
191 				{
192 					NGIRCd_Sniffer = TRUE;
193 					ok = TRUE;
194 				}
195 #endif
196 				if( argv[i][n] == 't' )
197 				{
198 					configtest = TRUE;
199 					ok = TRUE;
200 				}
201 
202 				if( ! ok )
203 				{
204 					printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
205 					printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
206 					exit( 1 );
207 				}
208 			}
209 
210 		}
211 		if( ! ok )
212 		{
213 			printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
214 			printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
215 			exit( 1 );
216 		}
217 	}
218 
219 	/* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
220 	NGIRCd_DebugLevel[0] = '\0';
221 #ifdef DEBUG
222 	if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
223 #endif
224 #ifdef SNIFFER
225 	if( NGIRCd_Sniffer )
226 	{
227 		NGIRCd_Debug = TRUE;
228 		strcpy( NGIRCd_DebugLevel, "2" );
229 	}
230 #endif
231 
232 	/* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
233 	if( configtest )
234 	{
235 		Show_Version( ); puts( "" );
236 		exit( Conf_Test( ));
237 	}
238 	
239 	while( ! NGIRCd_SignalQuit )
240 	{
241 		/* Initialize global variables */
242 		NGIRCd_Start = time( NULL );
243 		(VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
244 
245 		NGIRCd_SignalRehash = FALSE;
246 		NGIRCd_SignalRestart = FALSE;
247 		NGIRCd_SignalQuit = FALSE;
248 
249 		/* Initialize modules, part I */
250 		Log_Init( );
251 		Conf_Init( );
252 
253 		if( Conf_Chroot[0] )
254 		{
255 			/* Chroot */
256 			if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
257 
258 			if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
259 			else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
260 		}
261 
262 		if( Conf_GID != 0 )
263 		{
264 			/* Set new group ID */
265 			if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
266 		}
267 		if( Conf_UID != 0 )
268 		{
269 			/* Set new user ID */
270 			if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
271 		}
272 
273 		/* Normally a child process is forked which isn't any longer
274 		 * connected to ther controlling terminal. Use "--nodaemon"
275 		 * to disable this "daemon mode" (useful for debugging). */
276 		if( ! NGIRCd_NoDaemon )
277 		{
278 			/* fork child process */
279 			pid = (LONG)fork( );
280 			if( pid > 0 )
281 			{
282 				/* "Old" process: exit. */
283 				exit( 0 );
284 			}
285 			if( pid < 0 )
286 			{
287 				/* Error!? */
288 				fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
289 				exit( 1 );
290 			}
291 
292 			/* New child process */
293 			(VOID)setsid( );
294 			chdir( "/" );
295 
296 			/* Detach stdin, stdout and stderr */
297 			(VOID)Setup_FDStreams( );
298 		}
299 
300 		/* Create PID file */
301 		pid = (LONG) getpid( );
302 		Pidfile_Create( pid );
303 
304 		/* Show user, group, and PID of the running daemon */
305 		pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
306 		Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.", pwd ? pwd->pw_name : "unknown", (LONG)getuid( ), grp ? grp->gr_name : "unknown", (LONG)getgid( ), pid);
307 
308 		/* Change working directory to home directory of the user
309 		 * we are running as (when not running chroot()'ed!) */
310 		if( Conf_UID != 0 && ! Conf_Chroot[0] )
311 		{
312 			struct passwd *pwd;
313 
314 			pwd = getpwuid( Conf_UID );
315 			if( pwd != NULL )
316 			{
317 				if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
318 				else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
319 			}
320 			else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
321 		}
322 
323 		/* Initialize modules, part II: these functions are eventually
324 		 * called with already dropped privileges ... */
325 		Resolve_Init( );
326 		Lists_Init( );
327 		Channel_Init( );
328 		Client_Init( );
329 #ifdef RENDEZVOUS
330 		Rendezvous_Init( );
331 #endif
332 		Conn_Init( );
333 
334 #ifdef DEBUG
335 		/* Redirect stderr handle to "error file" for debugging
336 		 * when not running in "no daemon" mode: */
337 		if( ! NGIRCd_NoDaemon ) Log_InitErrorfile( );
338 #endif
339 
340 		/* Signal-Handler initialisieren */
341 		Initialize_Signal_Handler( );
342 
343 		/* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
344 		 * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
345 		 * sind in doc/Protocol.txt beschrieben. */
346 #ifdef IRCPLUS
347 		sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
348 #ifdef ZLIB
349 		strcat( NGIRCd_ProtoID, "Z" );
350 #endif
351 		if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
352 #else
353 		sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
354 #endif
355 		strcat( NGIRCd_ProtoID, " P" );
356 #ifdef ZLIB
357 		strcat( NGIRCd_ProtoID, "Z" );
358 #endif
359 		Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
360 
361 		/* Vordefinierte Channels anlegen */
362 		Channel_InitPredefined( );
363 
364 		/* Listen-Ports initialisieren */
365 		if( Conn_InitListeners( ) < 1 )
366 		{
367 			Log( LOG_ALERT, "Server isn't listening on a single port!" );
368 			Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
369 			Pidfile_Delete( );
370 			exit( 1 );
371 		}
372 		
373 		/* Hauptschleife */
374 		Conn_Handler( );
375 
376 		/* Alles abmelden */
377 		Conn_Exit( );
378 #ifdef RENDEZVOUS
379 		Rendezvous_Exit( );
380 #endif
381 		Client_Exit( );
382 		Channel_Exit( );
383 		Lists_Exit( );
384 		Log_Exit( );
385 
386 		Pidfile_Delete( );
387 	}
388 
389 	return 0;
390 } /* main */
391 
392 
393 LOCAL VOID
394 Fill_Version( VOID )
395 {
396 	NGIRCd_VersionAddition[0] = '\0';
397 
398 #ifdef SYSLOG
399 	strcpy( NGIRCd_VersionAddition, "SYSLOG" );
400 #endif
401 #ifdef ZLIB
402 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
403 	strcat( NGIRCd_VersionAddition, "ZLIB" );
404 #endif
405 #ifdef TCPWRAP
406 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
407 	strcat( NGIRCd_VersionAddition, "TCPWRAP" );
408 #endif
409 #ifdef RENDEZVOUS
410 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
411 	strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
412 #endif
413 #ifdef IDENTAUTH
414 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
415 	strcat( NGIRCd_VersionAddition, "IDENT" );
416 #endif
417 #ifdef DEBUG
418 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
419 	strcat( NGIRCd_VersionAddition, "DEBUG" );
420 #endif
421 #ifdef SNIFFER
422 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
423 	strcat( NGIRCd_VersionAddition, "SNIFFER" );
424 #endif
425 #ifdef STRICT_RFC
426 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
427 	strcat( NGIRCd_VersionAddition, "RFC" );
428 #endif
429 #ifdef IRCPLUS
430 	if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
431 	strcat( NGIRCd_VersionAddition, "IRCPLUS" );
432 #endif
433 
434 	if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
435 	strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
436 	strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
437 	strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
438 	strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
439 	strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
440 
441 #ifdef CVSDATE
442 	snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
443 #else
444 	snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
445 #endif
446 } /* Fill_Version */
447 
448 
449 GLOBAL VOID
450 NGIRCd_Rehash( VOID )
451 {
452 	CHAR old_name[CLIENT_ID_LEN];
453 
454 	Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
455 	NGIRCd_SignalRehash = FALSE;
456 
457 	/* Close down all listening sockets */
458 	Conn_ExitListeners( );
459 
460 	/* Remember old server name */
461 	strcpy( old_name, Conf_ServerName );
462 
463 	/* Re-read configuration ... */
464 	Conf_Rehash( );
465 
466 	/* Recover old server name: it can't be changed during run-time */
467 	if( strcmp( old_name, Conf_ServerName ) != 0 )
468 	{
469 		strcpy( Conf_ServerName, old_name );
470 		Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
471 	}
472 
473 	/* Create new pre-defined channels */
474 	Channel_InitPredefined( );
475 	
476 	/* Start listening on sockets */
477 	Conn_InitListeners( );
478 
479 	/* Sync configuration with established connections */
480 	Conn_SyncServerStruct( );
481 
482 	Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
483 } /* NGIRCd_Rehash */
484 
485 
486 LOCAL VOID
487 Initialize_Signal_Handler( VOID )
488 {
489 	/* Signal-Handler initialisieren: einige Signale
490 	 * werden ignoriert, andere speziell behandelt. */
491 
492 #ifdef HAVE_SIGACTION
493 	/* sigaction() ist vorhanden */
494 
495 	struct sigaction saction;
496 
497 	/* Signal-Struktur initialisieren */
498 	memset( &saction, 0, sizeof( saction ));
499 	saction.sa_handler = Signal_Handler;
500 #ifdef SA_RESTART
501 	saction.sa_flags |= SA_RESTART;
502 #endif
503 #ifdef SA_NOCLDWAIT
504 	saction.sa_flags |= SA_NOCLDWAIT;
505 #endif
506 
507 	/* Signal-Handler einhaengen */
508 	sigaction( SIGINT, &saction, NULL );
509 	sigaction( SIGQUIT, &saction, NULL );
510 	sigaction( SIGTERM, &saction, NULL);
511 	sigaction( SIGHUP, &saction, NULL);
512 	sigaction( SIGCHLD, &saction, NULL);
513 
514 	/* einige Signale ignorieren */
515 	saction.sa_handler = SIG_IGN;
516 	sigaction( SIGPIPE, &saction, NULL );
517 #else
518 	/* kein sigaction() vorhanden */
519 
520 	/* Signal-Handler einhaengen */
521 	signal( SIGINT, Signal_Handler );
522 	signal( SIGQUIT, Signal_Handler );
523 	signal( SIGTERM, Signal_Handler );
524 	signal( SIGHUP, Signal_Handler );
525 	signal( SIGCHLD, Signal_Handler );
526 
527 	/* einige Signale ignorieren */
528 	signal( SIGPIPE, SIG_IGN );
529 #endif
530 } /* Initialize_Signal_Handler */
531 
532 
533 LOCAL VOID
534 Signal_Handler( INT Signal )
535 {
536 	/* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
537 	 * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
538 	 * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
539 
540 	switch( Signal )
541 	{
542 		case SIGTERM:
543 		case SIGINT:
544 		case SIGQUIT:
545 			/* wir soll(t)en uns wohl beenden ... */
546 			NGIRCd_SignalQuit = TRUE;
547 			break;
548 		case SIGHUP:
549 			/* Konfiguration neu einlesen: */
550 			NGIRCd_SignalRehash = TRUE;
551 			break;
552 		case SIGCHLD:
553 			/* Child-Prozess wurde beendet. Zombies vermeiden: */
554 			while( waitpid( -1, NULL, WNOHANG ) > 0);
555 			break;
556 #ifdef DEBUG
557 		default:
558 			/* unbekanntes bzw. unbehandeltes Signal */
559 			Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
560 #endif
561 	}
562 } /* Signal_Handler */
563 
564 
565 LOCAL VOID
566 Show_Version( VOID )
567 {
568 	puts( NGIRCd_Version );
569 	puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
570 	puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
571 	puts( "This is free software; see the source for copying conditions. There is NO" );
572 	puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
573 } /* Show_Version */
574 
575 
576 LOCAL VOID
577 Show_Help( VOID )
578 {
579 #ifdef DEBUG
580 	puts( "  -d, --debug        log extra debug messages" );
581 #endif
582 	puts( "  -f, --config <f>   use file <f> as configuration file" );
583 	puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
584 	puts( "  -p, --passive      disable automatic connections to other servers" );
585 #ifdef SNIFFER
586 	puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
587 #endif
588 	puts( "  -t, --configtest   read, validate and display configuration; then exit" );
589  	puts( "      --version      output version information and exit" );
590 	puts( "      --help         display this help and exit" );
591 } /* Show_Help */
592 
593 
594 LOCAL VOID
595 Pidfile_Delete( VOID )
596 {
597 	/* Pidfile configured? */
598 	if( ! Conf_PidFile[0] ) return;
599 
600 #ifdef DEBUG
601 	Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
602 #endif
603 
604 	if( unlink( Conf_PidFile ))
605 		Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
606 } /* Pidfile_Delete */
607 
608 
609 LOCAL VOID
610 Pidfile_Create( LONG pid )
611 {
612 	FILE *pidf;
613 
614 	/* Pidfile configured? */
615 	if( ! Conf_PidFile[0] ) return;
616 
617 #ifdef DEBUG
618 	Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
619 #endif
620 
621 	pidf = fopen( Conf_PidFile, "w" );
622 
623 	if( ! pidf )
624 	{
625 		Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
626 		return;
627 	}
628 
629 	if( fprintf( pidf, "%ld\n", pid ) < 0 )
630 		Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
631 
632 	if( fclose(pidf) != 0 )
633 		Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
634 } /* Pidfile_Create */
635 
636 
637 LOCAL VOID
638 Setup_FDStreams( VOID )
639 {
640 	INT fd;
641 
642 	/* Test if we can open /dev/null for reading and writing. If not
643 	 * we are most probably chrooted already and the server has been
644 	 * restarted. So we simply don't try to redirect stdXXX ... */
645 	fd = open( "/dev/null", O_RDWR );
646 	if ( fd < 0 ) return;
647 
648 	/* Close "old" stdin/out/err descriptors */
649 	close( 0 ); close( 1 ); close( 2 );
650 
651 	/* Create new stdin(0), stdout(1) and stderr(2) descriptors */
652 	dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
653 
654 	/* Close newly opened file descriptor if not stdin/out/err */
655 	if( fd > 2 ) close( fd );
656 } /* Setup_FDStreams */
657 
658 
659 /* -eof- */