412 lines
9.3 KiB
C
412 lines
9.3 KiB
C
/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
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*
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* Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
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* der GNU General Public License (GPL), wie von der Free Software Foundation
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* herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
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* der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
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* Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
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* der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
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*
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* $Id: ngircd.c,v 1.33 2002/03/12 15:19:12 alex Exp $
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*
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* ngircd.c: Hier beginnt alles ;-)
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*/
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#include "portab.h"
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#include "imp.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <time.h>
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#include "channel.h"
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#include "client.h"
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#include "conf.h"
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#include "conn.h"
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#include "defines.h"
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#include "irc.h"
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#include "log.h"
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#include "parse.h"
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#include "exp.h"
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#include "ngircd.h"
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LOCAL VOID Initialize_Signal_Handler( VOID );
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LOCAL VOID Signal_Handler( INT Signal );
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LOCAL VOID Initialize_Listen_Ports( VOID );
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LOCAL VOID Show_Version( VOID );
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LOCAL VOID Show_Help( VOID );
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GLOBAL INT main( INT argc, CONST CHAR *argv[] )
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{
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BOOLEAN ok;
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INT pid, i, n;
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NGIRCd_Restart = FALSE;
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NGIRCd_Quit = FALSE;
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NGIRCd_NoDaemon = FALSE;
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NGIRCd_Passive = FALSE;
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#ifdef DEBUG
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NGIRCd_Debug = FALSE;
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#endif
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#ifdef SNIFFER
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NGIRCd_Sniffer = FALSE;
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#endif
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/* Kommandozeile parsen */
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for( i = 1; i < argc; i++ )
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{
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ok = FALSE;
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if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
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{
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/* Lange Option */
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#ifdef DEBUG
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if( strcmp( argv[i], "--debug" ) == 0 )
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{
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NGIRCd_Debug = TRUE;
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ok = TRUE;
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}
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#endif
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if( strcmp( argv[i], "--help" ) == 0 )
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{
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Show_Version( ); puts( "" );
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Show_Help( ); puts( "" );
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exit( 1 );
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}
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if( strcmp( argv[i], "--nodaemon" ) == 0 )
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{
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NGIRCd_NoDaemon = TRUE;
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ok = TRUE;
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}
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if( strcmp( argv[i], "--passive" ) == 0 )
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{
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NGIRCd_Passive = TRUE;
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ok = TRUE;
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}
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#ifdef SNIFFER
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if( strcmp( argv[i], "--sniffer" ) == 0 )
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{
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NGIRCd_Sniffer = TRUE;
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ok = TRUE;
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}
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#endif
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if( strcmp( argv[i], "--version" ) == 0 )
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{
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Show_Version( );
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exit( 1 );
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}
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}
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else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
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{
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/* Kurze Option */
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for( n = 1; n < strlen( argv[i] ); n++ )
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{
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ok = FALSE;
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#ifdef DEBUG
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if( argv[i][n] == 'd' )
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{
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NGIRCd_Debug = TRUE;
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ok = TRUE;
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}
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#endif
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if( argv[i][n] == 'n' )
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{
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NGIRCd_NoDaemon = TRUE;
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ok = TRUE;
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}
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if( argv[i][n] == 'p' )
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{
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NGIRCd_Passive = TRUE;
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ok = TRUE;
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}
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#ifdef SNIFFER
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if( argv[i][n] == 's' )
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{
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NGIRCd_Sniffer = TRUE;
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ok = TRUE;
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}
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#endif
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if( ! ok )
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{
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printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
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puts( "Try \""PACKAGE" --help\" for more information." );
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exit( 1 );
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}
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}
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}
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if( ! ok )
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{
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printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
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puts( "Try \""PACKAGE" --help\" for more information." );
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exit( 1 );
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}
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}
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/* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
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strcpy( NGIRCd_DebugLevel, "" );
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#ifdef DEBUG
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if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
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#endif
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#ifdef SNIFFER
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if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
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#endif
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while( ! NGIRCd_Quit )
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{
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/* In der Regel wird ein Sub-Prozess ge-fork()'t, der
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* nicht mehr mit dem Terminal verbunden ist. Mit der
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* Option "--nodaemon" kann dies (z.B. zum Debuggen)
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* verhindert werden. */
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if( ! NGIRCd_NoDaemon )
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{
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/* Daemon im Hintergrund erzeugen */
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pid = fork( );
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if( pid > 0 )
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{
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/* "alter" Prozess */
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exit( 0 );
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}
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if( pid < 0 )
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{
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/* Fehler */
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printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
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exit( 1 );
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}
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/* Child-Prozess initialisieren */
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setsid( );
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chdir( "/" );
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}
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/* Globale Variablen initialisieren */
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NGIRCd_Start = time( NULL );
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strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
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NGIRCd_Restart = FALSE;
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NGIRCd_Quit = FALSE;
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/* Module initialisieren */
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Log_Init( );
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Conf_Init( );
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Channel_Init( );
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Client_Init( );
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Conn_Init( );
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/* Signal-Handler initialisieren */
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Initialize_Signal_Handler( );
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/* Listen-Ports initialisieren */
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Initialize_Listen_Ports( );
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/* Hauptschleife */
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while( TRUE )
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{
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if( NGIRCd_Quit || NGIRCd_Restart ) break;
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Conn_Handler( 5 );
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}
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/* Alles abmelden */
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Conn_Exit( );
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Client_Exit( );
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Channel_Exit( );
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Conf_Exit( );
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Log_Exit( );
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}
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#ifndef DEBUG
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/* aufraeumen */
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if( unlink( ERROR_FILE ) != 0 ) Log( LOG_ERR, "Can't delete \""ERROR_FILE"\": %s", strerror( errno ));
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#endif
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return 0;
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} /* main */
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GLOBAL CHAR *NGIRCd_Version( VOID )
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{
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STATIC CHAR version[126];
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sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
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return version;
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} /* NGIRCd_Version */
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GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
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{
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STATIC CHAR txt[64];
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strcpy( txt, "" );
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#ifdef USE_SYSLOG
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if( txt[0] ) strcat( txt, "+" );
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strcat( txt, "SYSLOG" );
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#endif
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#ifdef STRICT_RFC
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if( txt[0] ) strcat( txt, "+" );
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strcat( txt, "RFC" );
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#endif
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#ifdef DEBUG
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if( txt[0] ) strcat( txt, "+" );
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strcat( txt, "DEBUG" );
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#endif
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#ifdef SNIFFER
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if( txt[0] ) strcat( txt, "+" );
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strcat( txt, "SNIFFER" );
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#endif
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if( txt[0] ) strcat( txt, "-" );
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strcat( txt, TARGET_OS"/"TARGET_CPU );
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return txt;
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} /* NGIRCd_VersionAddition */
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LOCAL VOID Initialize_Signal_Handler( VOID )
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{
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/* Signal-Handler initialisieren: einige Signale
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* werden ignoriert, andere speziell behandelt. */
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#ifdef HAVE_SIGACTION
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/* sigaction() ist vorhanden */
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struct sigaction saction;
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/* Signal-Struktur initialisieren */
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memset( &saction, 0, sizeof( saction ));
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saction.sa_handler = Signal_Handler;
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#ifdef SA_RESTART
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saction.sa_flags |= SA_RESTART;
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#endif
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#ifdef SA_NOCLDWAIT
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saction.sa_flags |= SA_NOCLDWAIT;
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#endif
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/* Signal-Handler einhaengen */
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sigaction( SIGINT, &saction, NULL );
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sigaction( SIGQUIT, &saction, NULL );
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sigaction( SIGTERM, &saction, NULL);
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sigaction( SIGHUP, &saction, NULL);
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sigaction( SIGCHLD, &saction, NULL);
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/* einige Signale ignorieren */
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saction.sa_handler = SIG_IGN;
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sigaction( SIGPIPE, &saction, NULL );
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#else
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/* kein sigaction() vorhanden */
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/* Signal-Handler einhaengen */
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signal( SIGINT, Signal_Handler );
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signal( SIGQUIT, Signal_Handler );
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signal( SIGTERM, Signal_Handler );
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signal( SIGHUP, Signal_Handler );
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signal( SIGCHLD, Signal_Handler );
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/* einige Signale ignorieren */
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signal( SIGPIPE, SIG_IGN );
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#endif
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} /* Initialize_Signal_Handler */
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LOCAL VOID Signal_Handler( INT Signal )
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{
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/* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
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* fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
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* Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
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switch( Signal )
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{
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case SIGTERM:
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case SIGINT:
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case SIGQUIT:
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/* wir soll(t)en uns wohl beenden ... */
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if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
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else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
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else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
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NGIRCd_Quit = TRUE;
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break;
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case SIGHUP:
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/* neu starten */
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Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
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NGIRCd_Restart = TRUE;
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break;
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case SIGCHLD:
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/* Child-Prozess wurde beendet. Zombies vermeiden: */
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while( waitpid( -1, NULL, WNOHANG ) > 0);
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break;
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default:
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/* unbekanntes bzw. unbehandeltes Signal */
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Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
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}
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} /* Signal_Handler */
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LOCAL VOID Initialize_Listen_Ports( VOID )
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{
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/* Ports, auf denen der Server Verbindungen entgegennehmen
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* soll, initialisieren */
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INT created, i;
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created = 0;
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for( i = 0; i < Conf_ListenPorts_Count; i++ )
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{
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if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
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else Log( LOG_ERR, "Can't listen on port %d!", Conf_ListenPorts[i] );
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}
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if( created < 1 )
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{
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Log( LOG_ALERT, "Server isn't listening on a single port!" );
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Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
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exit( 1 );
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}
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} /* Initialize_Listen_Ports */
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LOCAL VOID Show_Version( VOID )
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{
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puts( NGIRCd_Version( ));
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puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
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puts( "This is free software; see the source for copying conditions. There is NO" );
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puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
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} /* Show_Version */
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LOCAL VOID Show_Help( VOID )
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{
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puts( "Compile-time defaults:\n" );
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puts( " - configuration: "CONFIG_FILE );
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puts( " - MOTD file: "MOTD_FILE );
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puts( " - server error log: "ERROR_FILE"\n" );
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puts( "Run-time options:\n" );
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#ifdef DEBUG
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puts( " -d, --debug log extra debug messages" );
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#endif
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puts( " -n, --nodaemon don't fork and don't detatch from controlling terminal" );
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puts( " -p, --passive disable automatic connections to other servers" );
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#ifdef SNIFFER
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puts( " -s, --sniffer enable network sniffer and display all IRC traffic" );
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#endif
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puts( " --version output version information and exit" );
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puts( " --help display this help and exit" );
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} /* Show_Help */
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/* -eof- */
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