X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fngircd.c;h=d2a6d7ea8faae860f0df893edef82969acf80a3b;hp=b54d3177f4699864d762ba8eeeeefc14d650b55d;hb=47ca178a219d682c589b27e64ee1a4e936cc7bdc;hpb=ba258e65a0fafa444b66f589bc2e3bdc0b42b54c

diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c
index b54d3177..d2a6d7ea 100644
--- a/src/ngircd/ngircd.c
+++ b/src/ngircd/ngircd.c
@@ -1,22 +1,25 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2007 Alexander Barton (alex@barton.de).
  *
- * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
- * der GNU General Public License (GPL), wie von der Free Software Foundation
- * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
- * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
- * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
- * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
- *
- * $Id: ngircd.c,v 1.46 2002/05/27 13:00:50 alex Exp $
- *
- * ngircd.c: Hier beginnt alles ;-)
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * Please read the file COPYING, README and AUTHORS for more information.
  */
 
 
 #include "portab.h"
 
+static char UNUSED id[] = "$Id: ngircd.c,v 1.117 2007/11/21 12:16:36 alex Exp $";
+
+/**
+ * @file
+ * The main program, including the C function main() which is called
+ * by the loader of the operating system.
+ */
+
 #include "imp.h"
 #include <assert.h>
 #include <errno.h>
@@ -25,57 +28,84 @@
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
+#include <time.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <sys/wait.h>
-#include <time.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <grp.h>
 
+#include "defines.h"
 #include "resolve.h"
 #include "conn.h"
 #include "client.h"
 #include "channel.h"
 #include "conf.h"
-#include "defines.h"
+#include "cvs-version.h"
 #include "lists.h"
 #include "log.h"
 #include "parse.h"
 #include "irc.h"
 
+#ifdef ZEROCONF
+#include "rendezvous.h"
+#endif
+
 #include "exp.h"
 #include "ngircd.h"
 
 
-LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
-LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
+static void Initialize_Signal_Handler PARAMS(( void ));
+static void Signal_Handler PARAMS(( int Signal ));
 
-LOCAL VOID Initialize_Listen_Ports PARAMS(( VOID ));
+static void Show_Version PARAMS(( void ));
+static void Show_Help PARAMS(( void ));
 
-LOCAL VOID Show_Version PARAMS(( VOID ));
-LOCAL VOID Show_Help PARAMS(( VOID ));
+static void Pidfile_Create PARAMS(( pid_t pid ));
+static void Pidfile_Delete PARAMS(( void ));
 
+static void Fill_Version PARAMS(( void ));
 
+static void Setup_FDStreams PARAMS(( void ));
+
+static bool NGIRCd_Init PARAMS(( bool ));
+
+/**
+ * The main() function of ngIRCd.
+ * Here all starts: this function is called by the operating system loader,
+ * it is the first portion of code executed of ngIRCd.
+ * @param argc The number of arguments passed to ngIRCd on the command line.
+ * @param argv An array containing all the arguments passed to ngIRCd.
+ * @return Global exit code of ngIRCd, zero on success.
+ */
 GLOBAL int
 main( int argc, const char *argv[] )
 {
-	BOOLEAN ok, configtest = FALSE;
-	INT32 pid, n;
-	INT i;
-
-	NGIRCd_Restart = FALSE;
-	NGIRCd_Quit = FALSE;
-	NGIRCd_NoDaemon = FALSE;
-	NGIRCd_Passive = FALSE;
+	bool ok, configtest = false;
+	bool NGIRCd_NoDaemon = false;
+	int i;
+	size_t n;
+
+	umask( 0077 );
+
+	NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = false;
+	NGIRCd_Passive = false;
 #ifdef DEBUG
-	NGIRCd_Debug = FALSE;
+	NGIRCd_Debug = false;
 #endif
 #ifdef SNIFFER
-	NGIRCd_Sniffer = FALSE;
+	NGIRCd_Sniffer = false;
 #endif
-	strcpy( NGIRCd_ConfFile, CONFIG_FILE );
+	strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
+	strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
+
+	Fill_Version( );
 
 	/* Kommandozeile parsen */
 	for( i = 1; i < argc; i++ )
 	{
-		ok = FALSE;
+		ok = false;
 		if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
 		{
 			/* Lange Option */
@@ -84,24 +114,23 @@ main( int argc, const char *argv[] )
 			{
 				if( i + 1 < argc )
 				{
-					/* Ok, danach kommt noch ein Parameter */
-					strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
-					NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
+					/* Ok, there's an parameter left */
+					strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 
-					/* zum uebernaechsten Parameter */
-					i++; ok = TRUE;
+					/* next parameter */
+					i++; ok = true;
 				}
 			}
 			if( strcmp( argv[i], "--configtest" ) == 0 )
 			{
-				configtest = TRUE;
-				ok = TRUE;
+				configtest = true;
+				ok = true;
 			}
 #ifdef DEBUG
 			if( strcmp( argv[i], "--debug" ) == 0 )
 			{
-				NGIRCd_Debug = TRUE;
-				ok = TRUE;
+				NGIRCd_Debug = true;
+				ok = true;
 			}
 #endif
 			if( strcmp( argv[i], "--help" ) == 0 )
@@ -112,19 +141,19 @@ main( int argc, const char *argv[] )
 			}
 			if( strcmp( argv[i], "--nodaemon" ) == 0 )
 			{
-				NGIRCd_NoDaemon = TRUE;
-				ok = TRUE;
+				NGIRCd_NoDaemon = true;
+				ok = true;
 			}
 			if( strcmp( argv[i], "--passive" ) == 0 )
 			{
-				NGIRCd_Passive = TRUE;
-				ok = TRUE;
+				NGIRCd_Passive = true;
+				ok = true;
 			}
 #ifdef SNIFFER
 			if( strcmp( argv[i], "--sniffer" ) == 0 )
 			{
-				NGIRCd_Sniffer = TRUE;
-				ok = TRUE;
+				NGIRCd_Sniffer = true;
+				ok = true;
 			}
 #endif
 			if( strcmp( argv[i], "--version" ) == 0 )
@@ -136,52 +165,56 @@ main( int argc, const char *argv[] )
 		else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 		{
 			/* Kurze Option */
-			
-			for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
+			for( n = 1; n < strlen( argv[i] ); n++ )
 			{
-				ok = FALSE;
+				ok = false;
 #ifdef DEBUG
 				if( argv[i][n] == 'd' )
 				{
-					NGIRCd_Debug = TRUE;
-					ok = TRUE;
+					NGIRCd_Debug = true;
+					ok = true;
 				}
 #endif
 				if( argv[i][n] == 'f' )
 				{
 					if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 					{
-						/* Ok, danach kommt ein Leerzeichen */
-						strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
-						NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
+						/* Ok, next character is a blank */
+						strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 
-						/* zum uebernaechsten Parameter */
-						i++; n = strlen( argv[i] );
-						ok = TRUE;
+						/* go to the following parameter */
+						i++;
+						n = strlen( argv[i] );
+						ok = true;
 					}
 				}
 				if( argv[i][n] == 'n' )
 				{
-					NGIRCd_NoDaemon = TRUE;
-					ok = TRUE;
+					NGIRCd_NoDaemon = true;
+					ok = true;
 				}
 				if( argv[i][n] == 'p' )
 				{
-					NGIRCd_Passive = TRUE;
-					ok = TRUE;
+					NGIRCd_Passive = true;
+					ok = true;
 				}
 #ifdef SNIFFER
 				if( argv[i][n] == 's' )
 				{
-					NGIRCd_Sniffer = TRUE;
-					ok = TRUE;
+					NGIRCd_Sniffer = true;
+					ok = true;
 				}
 #endif
+				if( argv[i][n] == 't' )
+				{
+					configtest = true;
+					ok = true;
+				}
 
 				if( ! ok )
 				{
-					printf( "%s: invalid option \"-%c\"!\n", PACKAGE, argv[i][n] );
-					printf( "Try \"%s --help\" for more information.\n", PACKAGE );
+					printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
+					printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 					exit( 1 );
 				}
 			}
@@ -189,21 +222,21 @@ main( int argc, const char *argv[] )
 		}
 		if( ! ok )
 		{
-			printf( "%s: invalid option \"%s\"!\n", PACKAGE, argv[i] );
-			printf( "Try \"%s --help\" for more information.\n", PACKAGE );
+			printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
+			printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 			exit( 1 );
 		}
 	}
 
 	/* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
-	strcpy( NGIRCd_DebugLevel, "" );
+	NGIRCd_DebugLevel[0] = '\0';
 #ifdef DEBUG
 	if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 #endif
 #ifdef SNIFFER
 	if( NGIRCd_Sniffer )
 	{
-		NGIRCd_Debug = TRUE;
+		NGIRCd_Debug = true;
 		strcpy( NGIRCd_DebugLevel, "2" );
 	}
 #endif
@@ -215,139 +248,224 @@ main( int argc, const char *argv[] )
 		exit( Conf_Test( ));
 	}
 	
-	while( ! NGIRCd_Quit )
+	while( ! NGIRCd_SignalQuit )
 	{
-		/* In der Regel wird ein Sub-Prozess ge-fork()'t, der
-		 * nicht mehr mit dem Terminal verbunden ist. Mit der
-		 * Option "--nodaemon" kann dies (z.B. zum Debuggen)
-		 * verhindert werden. */
-		if( ! NGIRCd_NoDaemon )
-		{
-			/* Daemon im Hintergrund erzeugen */
-			pid = (INT32)fork( );
-			if( pid > 0 )
-			{
-				/* "alter" Prozess */
-				exit( 0 );
-			}
-			if( pid < 0 )
-			{
-				/* Fehler */
-				printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE, strerror( errno ));
-				exit( 1 );
-			}
-
-			/* Child-Prozess initialisieren */
-			(VOID)setsid( );
-			chdir( "/" );
-		}
-	
-		/* Globale Variablen initialisieren */
+		/* Initialize global variables */
 		NGIRCd_Start = time( NULL );
-		(VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
-		NGIRCd_Restart = FALSE;
-		NGIRCd_Quit = FALSE;
+		(void)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 
-		/* Module initialisieren */
-		Log_Init( );
-		Resolve_Init( );
+		NGIRCd_SignalRehash = false;
+		NGIRCd_SignalRestart = false;
+		NGIRCd_SignalQuit = false;
+
+		/* Initialize modules, part I */
+		Log_Init( ! NGIRCd_NoDaemon );
 		Conf_Init( );
-		Lists_Init( );
+
+		/* Initialize the "main program": chroot environment, user and
+		 * group ID, ... */
+		if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
+			Log(LOG_ALERT, "Fatal: Initialization failed");
+			exit(1);
+		}
+
+		/* Initialize modules, part II: these functions are eventually
+		 * called with already dropped privileges ... */
 		Channel_Init( );
 		Client_Init( );
+#ifdef ZEROCONF
+		Rendezvous_Init( );
+#endif
 		Conn_Init( );
 
-		/* Wenn als root ausgefuehrt und eine andere UID
-		 * konfiguriert ist, jetzt zu dieser wechseln */
-		if( getuid( ) == 0 )
-		{
-			if( Conf_GID != 0 )
-			{
-				/* Neue Group-ID setzen */
-				if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change Group-ID to %u: %s", Conf_GID, strerror( errno ));
-			}
-			if( Conf_UID != 0 )
-			{
-				/* Neue User-ID setzen */
-				if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change User-ID to %u: %s", Conf_UID, strerror( errno ));
-			}
-		}
-		Log( LOG_INFO, "Running as user %ld, group %ld.", (INT32)getuid( ), (INT32)getgid( ));
-
-		Log_InitErrorfile( );
+#ifdef DEBUG
+		/* Redirect stderr handle to "error file" for debugging
+		 * when not running in "no daemon" mode: */
+		if( ! NGIRCd_NoDaemon ) Log_InitErrorfile( );
+#endif
 
 		/* Signal-Handler initialisieren */
 		Initialize_Signal_Handler( );
 
-		/* Listen-Ports initialisieren */
-		Initialize_Listen_Ports( );
+		/* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
+		 * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
+		 * sind in doc/Protocol.txt beschrieben. */
+#ifdef IRCPLUS
+		snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
+#ifdef ZLIB
+		strcat( NGIRCd_ProtoID, "Z" );
+#endif
+		if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
+#else
+		snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
+#endif
+		strlcat( NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID );
+#ifdef ZLIB
+		strlcat( NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID );
+#endif
+		Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
 
-		/* Hauptschleife */
-		while( TRUE )
+		/* Vordefinierte Channels anlegen */
+		Channel_InitPredefined( );
+
+		/* Listen-Ports initialisieren */
+		if( Conn_InitListeners( ) < 1 )
 		{
-			if( NGIRCd_Quit || NGIRCd_Restart ) break;
-			Conn_Handler( 5 );
+			Log( LOG_ALERT, "Server isn't listening on a single port!" );
+			Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
+			Pidfile_Delete( );
+			exit( 1 );
 		}
+		
+		/* Hauptschleife */
+		Conn_Handler( );
 
 		/* Alles abmelden */
 		Conn_Exit( );
+#ifdef ZEROCONF
+		Rendezvous_Exit( );
+#endif
 		Client_Exit( );
 		Channel_Exit( );
-		Lists_Exit( );
 		Log_Exit( );
 	}
+	Pidfile_Delete( );
 
 	return 0;
 } /* main */
 
 
-GLOBAL CHAR *
-NGIRCd_Version( VOID )
+/**
+ * Generate ngIRCd "version string".
+ * This string is generated once and then stored in NGIRCd_Version for
+ * further usage, for example by the IRC command VERSION and the --version
+ * command line switch.
+ */
+static void
+Fill_Version( void )
 {
-	STATIC CHAR version[126];
+	NGIRCd_VersionAddition[0] = '\0';
+
+#ifdef SYSLOG
+	strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef ZLIB
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 
-	sprintf( version, "%s version %s-%s", PACKAGE, VERSION, NGIRCd_VersionAddition( ));
-	return version;
-} /* NGIRCd_Version */
+	strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef TCPWRAP
+	if( NGIRCd_VersionAddition[0] )
+			strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 
+	strlcat( NGIRCd_VersionAddition, "TCPWRAP", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef ZEROCONF
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 
-GLOBAL CHAR *
-NGIRCd_VersionAddition( VOID )
-{
-	STATIC CHAR txt[64];
+	strlcat( NGIRCd_VersionAddition, "ZEROCONF", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef IDENTAUTH
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 
-	strcpy( txt, "" );
+	strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef DEBUG
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 
-#ifdef USE_SYSLOG
-	if( txt[0] ) strcat( txt, "+" );
-	strcat( txt, "SYSLOG" );
+	strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
 #endif
-#ifdef REGEX
-	if( txt[0] ) strcat( txt, "+" );
-	strcat( txt, "REGEX" );
+#ifdef SNIFFER
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+	strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
 #endif
 #ifdef STRICT_RFC
-	if( txt[0] ) strcat( txt, "+" );
-	strcat( txt, "RFC" );
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+	strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
 #endif
-#ifdef DEBUG
-	if( txt[0] ) strcat( txt, "+" );
-	strcat( txt, "DEBUG" );
+#ifdef IRCPLUS
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+	strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
 #endif
-#ifdef SNIFFER
-	if( txt[0] ) strcat( txt, "+" );
-	strcat( txt, "SNIFFER" );
+
+	if( NGIRCd_VersionAddition[0] )
+		strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
+
+	strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
+	strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
+	strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
+	strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
+	strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
+
+#ifdef CVSDATE
+	snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
+#else
+	snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
 #endif
+} /* Fill_Version */
+
+
+/**
+ * Reload the server configuration file.
+ */
+GLOBAL void
+NGIRCd_Rehash( void )
+{
+	char old_name[CLIENT_ID_LEN];
+	unsigned old_nicklen;
+
+	Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
+	NGIRCd_SignalRehash = false;
 
-	if( txt[0] ) strcat( txt, "-" );
-	strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
+	/* Close down all listening sockets */
+	Conn_ExitListeners( );
 
-	return txt;
-} /* NGIRCd_VersionAddition */
+	/* Remember old server name and nick name length */
+	strlcpy( old_name, Conf_ServerName, sizeof old_name );
+	old_nicklen = Conf_MaxNickLength;
 
+	/* Re-read configuration ... */
+	Conf_Rehash( );
 
-LOCAL VOID
-Initialize_Signal_Handler( VOID )
+	/* Recover old server name and nick name length: these values can't
+	 * be changed during run-time */
+	if (strcmp(old_name, Conf_ServerName) != 0 ) {
+		strlcpy(Conf_ServerName, old_name, sizeof Conf_ServerName);
+		Log(LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name.");
+	}
+	if (old_nicklen != Conf_MaxNickLength) {
+		Conf_MaxNickLength = old_nicklen;
+		Log(LOG_ERR, "Can't change \"MaxNickLength\" on runtime! Ignored new value.");
+	}
+
+	/* Create new pre-defined channels */
+	Channel_InitPredefined( );
+	
+	/* Start listening on sockets */
+	Conn_InitListeners( );
+
+	/* Sync configuration with established connections */
+	Conn_SyncServerStruct( );
+
+	Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
+} /* NGIRCd_Rehash */
+
+
+/**
+ * Initialize the signal handler.
+ */
+static void
+Initialize_Signal_Handler( void )
 {
 	/* Signal-Handler initialisieren: einige Signale
 	 * werden ignoriert, andere speziell behandelt. */
@@ -368,116 +486,331 @@ Initialize_Signal_Handler( VOID )
 #endif
 
 	/* Signal-Handler einhaengen */
-	sigaction( SIGINT, &saction, NULL );
-	sigaction( SIGQUIT, &saction, NULL );
-	sigaction( SIGTERM, &saction, NULL);
-	sigaction( SIGHUP, &saction, NULL);
-	sigaction( SIGCHLD, &saction, NULL);
+	sigaction(SIGINT, &saction, NULL);
+	sigaction(SIGQUIT, &saction, NULL);
+	sigaction(SIGTERM, &saction, NULL);
+	sigaction(SIGHUP, &saction, NULL);
+	sigaction(SIGCHLD, &saction, NULL);
 
 	/* einige Signale ignorieren */
 	saction.sa_handler = SIG_IGN;
-	sigaction( SIGPIPE, &saction, NULL );
+	sigaction(SIGPIPE, &saction, NULL);
 #else
 	/* kein sigaction() vorhanden */
 
 	/* Signal-Handler einhaengen */
-	signal( SIGINT, Signal_Handler );
-	signal( SIGQUIT, Signal_Handler );
-	signal( SIGTERM, Signal_Handler );
-	signal( SIGHUP, Signal_Handler );
-	signal( SIGCHLD, Signal_Handler );
+	signal(SIGINT, Signal_Handler);
+	signal(SIGQUIT, Signal_Handler);
+	signal(SIGTERM, Signal_Handler);
+	signal(SIGHUP, Signal_Handler);
+	signal(SIGCHLD, Signal_Handler);
 
 	/* einige Signale ignorieren */
-	signal( SIGPIPE, SIG_IGN );
+	signal(SIGPIPE, SIG_IGN);
 #endif
 } /* Initialize_Signal_Handler */
 
 
-LOCAL VOID
-Signal_Handler( INT Signal )
+/**
+ * Signal handler of ngIRCd.
+ * This function is called whenever ngIRCd catches a signal sent by the
+ * user and/or the system to it. For example SIGTERM and SIGHUP.
+ * @param Signal Number of the signal to handle.
+ */
+static void
+Signal_Handler( int Signal )
 {
-	/* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
-	 * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
-	 * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
-
 	switch( Signal )
 	{
 		case SIGTERM:
 		case SIGINT:
 		case SIGQUIT:
 			/* wir soll(t)en uns wohl beenden ... */
-			if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
-			else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
-			else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
-			NGIRCd_Quit = TRUE;
+			NGIRCd_SignalQuit = true;
 			break;
 		case SIGHUP:
-			/* neu starten */
-			Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
-			NGIRCd_Restart = TRUE;
+			/* Konfiguration neu einlesen: */
+			NGIRCd_SignalRehash = true;
 			break;
 		case SIGCHLD:
 			/* Child-Prozess wurde beendet. Zombies vermeiden: */
 			while( waitpid( -1, NULL, WNOHANG ) > 0);
 			break;
+#ifdef DEBUG
 		default:
 			/* unbekanntes bzw. unbehandeltes Signal */
-			Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
+			Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
+#endif
 	}
 } /* Signal_Handler */
 
 
-LOCAL VOID
-Initialize_Listen_Ports( VOID )
-{
-	/* Ports, auf denen der Server Verbindungen entgegennehmen
-	 * soll, initialisieren */
-	
-	UINT created, i;
-
-	created = 0;
-	for( i = 0; i < Conf_ListenPorts_Count; i++ )
-	{
-		if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
-		else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
-	}
-
-	if( created < 1 )
-	{
-		Log( LOG_ALERT, "Server isn't listening on a single port!" );
-		Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE );
-		exit( 1 );
-	}
-} /* Initialize_Listen_Ports */
-
-
-LOCAL VOID
-Show_Version( VOID )
+/**
+ * Display copyright and version information of ngIRCd on the console.
+ */
+static void
+Show_Version( void )
 {
-	puts( NGIRCd_Version( ));
-	puts( "Copyright (c)2001,2002 by Alexander Barton (<alex@barton.de>)." );
-	puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
+	puts( NGIRCd_Version );
+	puts( "Copyright (c)2001-2007 Alexander Barton (<alex@barton.de>) and Contributors." );
+	puts( "Homepage: <http://ngircd.barton.de/>\n" );
 	puts( "This is free software; see the source for copying conditions. There is NO" );
 	puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 } /* Show_Version */
 
 
-LOCAL VOID
-Show_Help( VOID )
+/**
+ * Display a short help text on the console.
+ * This help depends on the configuration of the executable and only shows
+ * options that are actually enabled.
+ */
+static void
+Show_Help( void )
 {
 #ifdef DEBUG
 	puts( "  -d, --debug        log extra debug messages" );
 #endif
 	puts( "  -f, --config <f>   use file <f> as configuration file" );
-        puts( "  -n, --nodaemon     don't fork and don't detatch from controlling terminal" );
-        puts( "  -p, --passive      disable automatic connections to other servers" );
+	puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
+	puts( "  -p, --passive      disable automatic connections to other servers" );
 #ifdef SNIFFER
 	puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 #endif
-	puts( "      --configtest   read, validate and display configuration; then exit" );
+	puts( "  -t, --configtest   read, validate and display configuration; then exit" );
  	puts( "      --version      output version information and exit" );
 	puts( "      --help         display this help and exit" );
 } /* Show_Help */
 
 
+/**
+ * Delete the file containing the process ID (PID).
+ */
+static void
+Pidfile_Delete( void )
+{
+	/* Pidfile configured? */
+	if( ! Conf_PidFile[0] ) return;
+
+#ifdef DEBUG
+	Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
+#endif
+
+	if( unlink( Conf_PidFile ))
+		Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
+} /* Pidfile_Delete */
+
+
+/**
+ * Create the file containing the process ID of ngIRCd ("PID file").
+ * @param pid The process ID to be stored in this file.
+ */
+static void
+Pidfile_Create(pid_t pid)
+{
+	int pidfd;
+	char pidbuf[64];
+	int len;
+
+	/* Pidfile configured? */
+	if( ! Conf_PidFile[0] ) return;
+
+#ifdef DEBUG
+	Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
+#endif
+
+	pidfd = open( Conf_PidFile, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+	if ( pidfd < 0 ) {
+		Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
+		return;
+	}
+
+	len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
+	if (len < 0 || len >= (int)sizeof pidbuf) {
+		Log( LOG_ERR, "Error converting pid");
+		return;
+	}
+	
+	if (write(pidfd, pidbuf, (size_t)len) != (ssize_t)len)
+		Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
+
+	if( close(pidfd) != 0 )
+		Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
+} /* Pidfile_Create */
+
+
+/**
+ * Redirect stdin, stdout and stderr to apropriate file handles.
+ */
+static void
+Setup_FDStreams( void )
+{
+	int fd;
+
+	/* Test if we can open /dev/null for reading and writing. If not
+	 * we are most probably chrooted already and the server has been
+	 * restarted. So we simply don't try to redirect stdXXX ... */
+	fd = open( "/dev/null", O_RDWR );
+	if ( fd < 0 ) {
+		Log(LOG_WARNING, "Could not open /dev/null: %s", strerror(errno));	
+		return;
+	} 
+
+	fflush(stdout);
+	fflush(stderr);
+
+	/* Create new stdin(0), stdout(1) and stderr(2) descriptors */
+	dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
+
+	/* Close newly opened file descriptor if not stdin/out/err */
+	if( fd > 2 ) close( fd );
+} /* Setup_FDStreams */
+
+
+static bool
+NGIRCd_getNobodyID(uid_t *uid, gid_t *gid )
+{
+	struct passwd *pwd;
+
+	pwd = getpwnam("nobody");
+	if (!pwd) return false;
+
+	if ( !pwd->pw_uid || !pwd->pw_gid)
+		return false;
+
+	*uid = pwd->pw_uid;	
+	*gid = pwd->pw_gid;
+	endpwent();
+
+	return true;	
+}
+
+
+static bool
+NGIRCd_Init( bool NGIRCd_NoDaemon ) 
+{
+	static bool initialized;
+	bool chrooted = false;
+	struct passwd *pwd;
+	struct group *grp;
+	int real_errno;
+	pid_t pid;
+
+	if (initialized)
+		return true;
+
+	if( Conf_Chroot[0] ) {
+		if( chdir( Conf_Chroot ) != 0 ) {
+			Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
+			return false;
+		}
+
+		if( chroot( Conf_Chroot ) != 0 ) {
+			if (errno != EPERM) {
+				Log( LOG_ERR, "Can't change root directory to \"%s\": %s",
+								Conf_Chroot, strerror( errno ));
+
+				return false;
+			}
+		} else {
+			chrooted = true;
+			Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
+		}
+	}
+
+	if (Conf_UID == 0) {
+		Log(LOG_INFO, "ServerUID must not be 0, using \"nobody\" instead.", Conf_UID);
+
+  		if (! NGIRCd_getNobodyID(&Conf_UID, &Conf_GID)) {
+			Log(LOG_WARNING, "Could not get user/group ID of user \"nobody\": %s",
+					errno ? strerror(errno) : "not found" );
+			return false;
+		}
+	}
+
+	if (getgid() != Conf_GID) {
+		/* Change group ID */
+		if (setgid(Conf_GID) != 0) {
+			real_errno = errno;
+			Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
+			if (real_errno != EPERM) 
+				return false;
+		}
+	}
+
+	if (getuid() != Conf_UID) {
+		/* Change user ID */
+		if (setuid(Conf_UID) != 0) {
+			real_errno = errno;
+			Log(LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror(errno));
+			if (real_errno != EPERM) 
+				return false;
+		}
+	}
+
+	initialized = true;
+
+	/* Normally a child process is forked which isn't any longer
+	 * connected to ther controlling terminal. Use "--nodaemon"
+	 * to disable this "daemon mode" (useful for debugging). */
+	if ( ! NGIRCd_NoDaemon ) {
+		pid = fork( );
+		if( pid > 0 ) {
+			/* "Old" process: exit. */
+			exit( 0 );
+		}
+		if( pid < 0 ) {
+			/* Error!? */
+			fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
+								PACKAGE_NAME, strerror( errno ));
+			exit( 1 );
+		}
+
+		/* New child process */
+		(void)setsid( );
+		chdir( "/" );
+
+		/* Detach stdin, stdout and stderr */
+		Setup_FDStreams( );
+	}
+	pid = getpid();
+
+	Pidfile_Create( pid );
+
+	/* Check UID/GID we are running as, can be different from values
+	 * configured (e. g. if we were already started with a UID>0. */
+	Conf_UID = getuid();
+	Conf_GID = getgid();
+
+	pwd = getpwuid( Conf_UID );
+	grp = getgrgid( Conf_GID );
+
+	Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
+				pwd ? pwd->pw_name : "unknown", Conf_UID,
+				grp ? grp->gr_name : "unknown", Conf_GID, pid);
+
+	if ( chrooted ) {
+		Log( LOG_INFO, "Running chrooted, chrootdir \"%s\".",  Conf_Chroot );
+		return true;
+	} else {
+		Log( LOG_INFO, "Not running chrooted." );
+	}
+
+	/* Change working directory to home directory of the user
+	 * we are running as (only when running in daemon mode and not in chroot) */
+	
+	if ( pwd ) {
+		if (!NGIRCd_NoDaemon ) {
+			if( chdir( pwd->pw_dir ) == 0 ) 
+				Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
+			else 
+				Log( LOG_INFO, "Notice: Can't change working directory to \"%s\": %s",
+								pwd->pw_dir, strerror( errno ));
+		}
+	} else {
+		Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
+	}
+
+return true;
+}
+
 /* -eof- */