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ngircd-tor/src/ngircd/ngircd.c

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/*
* ngIRCd -- The Next Generation IRC Daemon
* Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
*
* 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.
*
* Main program -- main()
*/
#include "portab.h"
static char UNUSED id[] = "$Id: ngircd.c,v 1.78 2003/12/26 15:55:07 alex Exp $";
#include "imp.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include "resolve.h"
#include "conn.h"
#include "client.h"
#include "channel.h"
#include "conf.h"
#include "cvs-version.h"
#include "defines.h"
#include "lists.h"
#include "log.h"
#include "parse.h"
#include "irc.h"
#ifdef RENDEZVOUS
#include "rendezvous.h"
#endif
#include "exp.h"
#include "ngircd.h"
LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
LOCAL VOID Show_Version PARAMS(( VOID ));
LOCAL VOID Show_Help PARAMS(( VOID ));
GLOBAL int
main( int argc, const char *argv[] )
{
struct passwd *pwd;
struct group *grp;
BOOLEAN ok, configtest = FALSE;
LONG pid, n;
INT i;
umask( 0077 );
NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE;
NGIRCd_NoDaemon = NGIRCd_Passive = FALSE;
#ifdef DEBUG
NGIRCd_Debug = FALSE;
#endif
#ifdef SNIFFER
NGIRCd_Sniffer = FALSE;
#endif
strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
/* Kommandozeile parsen */
for( i = 1; i < argc; i++ )
{
ok = FALSE;
if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
{
/* Lange Option */
if( strcmp( argv[i], "--config" ) == 0 )
{
if( i + 1 < argc )
{
/* Ok, there's an parameter left */
strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
/* next parameter */
i++; ok = TRUE;
}
}
if( strcmp( argv[i], "--configtest" ) == 0 )
{
configtest = TRUE;
ok = TRUE;
}
#ifdef DEBUG
if( strcmp( argv[i], "--debug" ) == 0 )
{
NGIRCd_Debug = TRUE;
ok = TRUE;
}
#endif
if( strcmp( argv[i], "--help" ) == 0 )
{
Show_Version( );
puts( "" ); Show_Help( ); puts( "" );
exit( 1 );
}
if( strcmp( argv[i], "--nodaemon" ) == 0 )
{
NGIRCd_NoDaemon = TRUE;
ok = TRUE;
}
if( strcmp( argv[i], "--passive" ) == 0 )
{
NGIRCd_Passive = TRUE;
ok = TRUE;
}
#ifdef SNIFFER
if( strcmp( argv[i], "--sniffer" ) == 0 )
{
NGIRCd_Sniffer = TRUE;
ok = TRUE;
}
#endif
if( strcmp( argv[i], "--version" ) == 0 )
{
Show_Version( );
exit( 1 );
}
}
else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
{
/* Kurze Option */
for( n = 1; n < (LONG)strlen( argv[i] ); n++ )
{
ok = FALSE;
#ifdef DEBUG
if( argv[i][n] == 'd' )
{
NGIRCd_Debug = TRUE;
ok = TRUE;
}
#endif
if( argv[i][n] == 'f' )
{
if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
{
/* Ok, next character is a blank */
strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
/* go to the following parameter */
i++; n = (LONG)strlen( argv[i] );
ok = TRUE;
}
}
if( argv[i][n] == 'n' )
{
NGIRCd_NoDaemon = TRUE;
ok = TRUE;
}
if( argv[i][n] == 'p' )
{
NGIRCd_Passive = TRUE;
ok = TRUE;
}
#ifdef SNIFFER
if( argv[i][n] == 's' )
{
NGIRCd_Sniffer = TRUE;
ok = TRUE;
}
#endif
if( ! ok )
{
printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
exit( 1 );
}
}
}
if( ! ok )
{
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, "" );
#ifdef DEBUG
if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
#endif
#ifdef SNIFFER
if( NGIRCd_Sniffer )
{
NGIRCd_Debug = TRUE;
strcpy( NGIRCd_DebugLevel, "2" );
}
#endif
/* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
if( configtest )
{
Show_Version( ); puts( "" );
exit( Conf_Test( ));
}
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 = (LONG)fork( );
if( pid > 0 )
{
/* "alter" Prozess */
exit( 0 );
}
if( pid < 0 )
{
/* Fehler */
printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
exit( 1 );
}
/* Child-Prozess initialisieren */
(VOID)setsid( );
chdir( "/" );
}
/* Globale Variablen initialisieren */
NGIRCd_Start = time( NULL );
(VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
NGIRCd_SignalRehash = FALSE;
NGIRCd_SignalRestart = FALSE;
NGIRCd_SignalQuit = FALSE;
/* Module initialisieren */
Log_Init( );
Resolve_Init( );
Conf_Init( );
Lists_Init( );
Channel_Init( );
Client_Init( );
#ifdef RENDEZVOUS
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 ));
}
}
/* User, Gruppe und Prozess-ID des Daemon ausgeben */
pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
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( ), (LONG)getpid( ));
/* stderr in "Error-File" umlenken */
Log_InitErrorfile( );
/* Signal-Handler initialisieren */
Initialize_Signal_Handler( );
/* 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
sprintf( 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
sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
#endif
strcat( NGIRCd_ProtoID, " P" );
#ifdef ZLIB
strcat( NGIRCd_ProtoID, "Z" );
#endif
Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
/* Vordefinierte Channels anlegen */
Channel_InitPredefined( );
/* Listen-Ports initialisieren */
if( Conn_InitListeners( ) < 1 )
{
Log( LOG_ALERT, "Server isn't listening on a single port!" );
Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
exit( 1 );
}
/* Hauptschleife */
Conn_Handler( );
/* Alles abmelden */
Conn_Exit( );
#ifdef RENDEZVOUS
Rendezvous_Exit( );
#endif
Client_Exit( );
Channel_Exit( );
Lists_Exit( );
Log_Exit( );
}
return 0;
} /* main */
GLOBAL CHAR *
NGIRCd_Version( VOID )
{
STATIC CHAR version[126];
#ifdef CVSDATE
sprintf( version, "%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition( ));
#else
sprintf( version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition( ));
#endif
return version;
} /* NGIRCd_Version */
GLOBAL CHAR *
NGIRCd_VersionAddition( VOID )
{
STATIC CHAR txt[200];
strcpy( txt, "" );
#ifdef SYSLOG
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "SYSLOG" );
#endif
#ifdef ZLIB
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "ZLIB" );
#endif
#ifdef TCPWRAP
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "TCPWRAP" );
#endif
#ifdef RENDEZVOUS
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "RENDEZVOUS" );
#endif
#ifdef DEBUG
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "DEBUG" );
#endif
#ifdef SNIFFER
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "SNIFFER" );
#endif
#ifdef STRICT_RFC
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "RFC" );
#endif
#ifdef IRCPLUS
if( txt[0] ) strcat( txt, "+" );
strcat( txt, "IRCPLUS" );
#endif
if( txt[0] ) strlcat( txt, "-", sizeof( txt ));
strlcat( txt, TARGET_CPU, sizeof( txt ));
strlcat( txt, "/", sizeof( txt ));
strlcat( txt, TARGET_VENDOR, sizeof( txt ));
strlcat( txt, "/", sizeof( txt ));
strlcat( txt, TARGET_OS, sizeof( txt ));
return txt;
} /* NGIRCd_VersionAddition */
GLOBAL VOID
NGIRCd_Rehash( VOID )
{
CHAR old_name[CLIENT_ID_LEN];
Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
NGIRCd_SignalRehash = FALSE;
/* Alle Listen-Sockets schliessen */
Conn_ExitListeners( );
/* Alten Server-Namen merken */
#ifdef DEBUG
assert( sizeof( old_name ) == sizeof( Conf_ServerName ));
#endif
strcpy( old_name, Conf_ServerName );
/* Konfiguration neu lesen ... */
Conf_Rehash( );
/* Alten Server-Namen wiederherstellen: dieser
* kann nicht zur Laufzeit geaendert werden ... */
if( strcmp( old_name, Conf_ServerName ) != 0 )
{
strcpy( Conf_ServerName, old_name );
Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
}
/* neue pre-defined Channel anlegen: */
Channel_InitPredefined( );
/* Listen-Sockets neu anlegen: */
Conn_InitListeners( );
/* Sync configuration with established connections */
Conn_SyncServerStruct( );
Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
} /* NGIRCd_Rehash */
LOCAL VOID
Initialize_Signal_Handler( VOID )
{
/* Signal-Handler initialisieren: einige Signale
* werden ignoriert, andere speziell behandelt. */
#ifdef HAVE_SIGACTION
/* sigaction() ist vorhanden */
struct sigaction saction;
/* Signal-Struktur initialisieren */
memset( &saction, 0, sizeof( saction ));
saction.sa_handler = Signal_Handler;
#ifdef SA_RESTART
saction.sa_flags |= SA_RESTART;
#endif
#ifdef SA_NOCLDWAIT
saction.sa_flags |= SA_NOCLDWAIT;
#endif
/* Signal-Handler einhaengen */
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 );
#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 );
/* einige Signale ignorieren */
signal( SIGPIPE, SIG_IGN );
#endif
} /* Initialize_Signal_Handler */
LOCAL 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 ... */
NGIRCd_SignalQuit = TRUE;
break;
case SIGHUP:
/* 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_DEBUG, "Got signal %d! Ignored.", Signal );
#endif
}
} /* Signal_Handler */
LOCAL VOID
Show_Version( VOID )
{
puts( NGIRCd_Version( ));
puts( "Copyright (c)2001-2003 by Alexander Barton (<alex@barton.de>)." );
puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\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 )
{
#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 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( " --version output version information and exit" );
puts( " --help display this help and exit" );
} /* Show_Help */
/* -eof- */
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