/*
* 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 1.21 2002/01/21 00:02:11 alex Exp $
- *
- * ngircd.c: Hier beginnt alles ;-)
- *
- * $Log: ngircd.c,v $
- * Revision 1.21 2002/01/21 00:02:11 alex
- * - Hilfetexte korrigiert und ergaenzt (Sniffer).
- *
- * Revision 1.20 2002/01/18 11:12:11 alex
- * - der Sniffer wird nun nur noch aktiviert, wenn auf Kommandozeile angegeben.
- *
- * Revision 1.19 2002/01/12 00:17:28 alex
- * - ngIRCd wandelt sich nun selber in einen Daemon (Hintergrundprozess) um.
- *
- * Revision 1.18 2002/01/11 14:45:18 alex
- * - Kommandozeilen-Parser implementiert: Debug- und No-Daemon-Modus, Hilfe.
- *
- * Revision 1.17 2002/01/02 02:51:16 alex
- * - Signal-Handler fuer SIGCHLD: so sollten Zombies nicht mehr vorkommen.
- *
- * Revision 1.15 2001/12/31 02:18:51 alex
- * - viele neue Befehle (WHOIS, ISON, OPER, DIE, RESTART),
- * - neuen Header "defines.h" mit (fast) allen Konstanten.
- * - Code Cleanups und viele "kleine" Aenderungen & Bugfixes.
- *
- * Revision 1.14 2001/12/30 19:26:12 alex
- * - Unterstuetzung fuer die Konfigurationsdatei eingebaut.
- *
- * Revision 1.13 2001/12/30 11:42:00 alex
- * - der Server meldet nun eine ordentliche "Start-Zeit".
- *
- * Revision 1.12 2001/12/29 03:07:36 alex
- * - einige Loglevel geaendert.
- *
- * Revision 1.11 2001/12/26 14:45:37 alex
- * - "Code Cleanups".
- *
- * Revision 1.10 2001/12/24 01:34:38 alex
- * - Signal-Handler aufgeraeumt; u.a. SIGPIPE wird nun korrekt ignoriert.
- *
- * Revision 1.9 2001/12/21 22:24:50 alex
- * - neues Modul "parse" wird initialisiert und abgemeldet.
- *
- * Revision 1.8 2001/12/14 08:15:26 alex
- * - neue Module (irc, client, channel) werden an- und abgemeldet.
- * - zweiter Listen-Socket wird zu Testzwecken konfiguriert.
- *
- * Revision 1.7 2001/12/13 01:31:46 alex
- * - Conn_Handler() wird nun mit einem Timeout aufgerufen.
- *
- * Revision 1.6 2001/12/12 23:30:42 alex
- * - Log-Meldungen an syslog angepasst.
- * - NGIRCd_Quit ist nun das Flag zum Beenden des ngircd.
- *
- * Revision 1.5 2001/12/12 17:21:21 alex
- * - mehr Unterfunktionen eingebaut, Modul besser strukturiert & dokumentiert.
- * - Anpassungen an neue Module.
- *
- * Revision 1.4 2001/12/12 01:58:53 alex
- * - Test auf socklen_t verbessert.
- *
- * Revision 1.3 2001/12/12 01:40:39 alex
- * - ein paar mehr Kommentare; Variablennamen verstaendlicher gemacht.
- * - fehlenden Header <arpa/inet.h> ergaenz.
- * - SIGINT und SIGQUIT werden nun ebenfalls behandelt.
- *
- * Revision 1.2 2001/12/11 22:04:21 alex
- * - Test auf stdint.h (HAVE_STDINT_H) hinzugefuegt.
- *
- * Revision 1.1.1.1 2001/12/11 21:53:04 alex
- * - Imported sources to CVS.
+ * 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.
*/
-#define PORTAB_CHECK_TYPES /* Prueffunktion einbinden, s.u. */
-
+#include "portab.h"
-#include <portab.h>
-#include "global.h"
+static char UNUSED id[] = "$Id: ngircd.c,v 1.117 2007/11/21 12:16:36 alex Exp $";
-#include <imp.h>
+/**
+ * @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>
#include <stdio.h>
+#include <stdlib.h>
#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 "channel.h"
+#include "defines.h"
+#include "resolve.h"
+#include "conn.h"
#include "client.h"
+#include "channel.h"
#include "conf.h"
-#include "conn.h"
-#include "irc.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 "exp.h"
#include "ngircd.h"
-LOCAL VOID Initialize_Signal_Handler( VOID );
-LOCAL VOID Signal_Handler( INT Signal );
+static void Initialize_Signal_Handler PARAMS(( void ));
+static void Signal_Handler PARAMS(( int Signal ));
-LOCAL VOID Initialize_Listen_Ports( VOID );
+static void Show_Version PARAMS(( void ));
+static void Show_Help PARAMS(( void ));
-LOCAL VOID Show_Version( VOID );
-LOCAL VOID Show_Help( VOID );
+static void Pidfile_Create PARAMS(( pid_t pid ));
+static void Pidfile_Delete PARAMS(( void ));
+static void Fill_Version PARAMS(( void ));
-GLOBAL INT main( INT argc, CONST CHAR *argv[] )
+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;
- INT pid, i, n;
+ bool ok, configtest = false;
+ bool NGIRCd_NoDaemon = false;
+ int i;
+ size_t n;
- /* Datentypen der portab-Library ueberpruefen */
- portab_check_types( );
+ umask( 0077 );
- NGIRCd_Restart = FALSE;
- NGIRCd_Quit = FALSE;
- NGIRCd_NoDaemon = FALSE;
+ 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
+ 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 */
- if( strcmp( argv[i], "--help" ) == 0 )
+ if( strcmp( argv[i], "--config" ) == 0 )
{
- Show_Version( ); puts( "" );
- Show_Help( ); puts( "" );
- exit( 1 );
+ 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], "--version" ) == 0 )
+ if( strcmp( argv[i], "--configtest" ) == 0 )
{
- Show_Version( );
- exit( 1 );
+ 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 )
+ {
+ 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;
+ NGIRCd_Sniffer = true;
+ ok = true;
}
#endif
- if( strcmp( argv[i], "--nodaemon" ) == 0 )
+ if( strcmp( argv[i], "--version" ) == 0 )
{
- NGIRCd_NoDaemon = TRUE;
- ok = TRUE;
+ Show_Version( );
+ exit( 1 );
}
}
else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
{
/* Kurze Option */
-
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, next character is a blank */
+ strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
+
+ /* go to the following parameter */
+ i++;
+ n = 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;
+ NGIRCd_Sniffer = true;
+ ok = true;
}
#endif
- if( argv[i][n] == 'n' )
+ if( argv[i][n] == 't' )
{
- NGIRCd_NoDaemon = TRUE;
- ok = TRUE;
+ configtest = true;
+ ok = true;
}
if( ! ok )
{
- printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
- puts( "Try \""PACKAGE" --help\" for more information." );
+ 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( PACKAGE": invalid option \"%s\"!\n", argv[i] );
- puts( "Try \""PACKAGE" --help\" for more information." );
+ printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
+ printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
exit( 1 );
}
}
- while( ! NGIRCd_Quit )
+ /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
+ NGIRCd_DebugLevel[0] = '\0';
+#ifdef DEBUG
+ if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
+#endif
+#ifdef SNIFFER
+ if( NGIRCd_Sniffer )
{
- /* 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 = fork( );
- if( pid > 0 )
- {
- /* "alter" Prozess */
- exit( 0 );
- }
- if( pid < 0 )
- {
- /* Fehler */
- printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
- exit( 1 );
- }
- setsid( );
- chdir( "/" );
- }
+ NGIRCd_Debug = true;
+ strcpy( NGIRCd_DebugLevel, "2" );
+ }
+#endif
+
+ /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
+ if( configtest )
+ {
+ Show_Version( ); puts( "" );
+ exit( Conf_Test( ));
+ }
- /* Globale Variablen initialisieren */
+ while( ! NGIRCd_SignalQuit )
+ {
+ /* Initialize global variables */
NGIRCd_Start = time( NULL );
- 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 ));
+
+ NGIRCd_SignalRehash = false;
+ NGIRCd_SignalRestart = false;
+ NGIRCd_SignalQuit = false;
- /* Module initialisieren */
- Log_Init( );
+ /* Initialize modules, part I */
+ Log_Init( ! NGIRCd_NoDaemon );
Conf_Init( );
- Parse_Init( );
- IRC_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( );
+#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( );
- IRC_Exit( );
- Parse_Exit( );
- Conf_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];
- CHAR txt[64];
+ NGIRCd_VersionAddition[0] = '\0';
- strcpy( txt, "" );
+#ifdef SYSLOG
+ strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef ZLIB
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-#ifdef USE_SYSLOG
- if( txt[0] ) strcat( txt, "+" );
- else strcat( txt, "-" );
- strcat( txt, "SYSLOG" );
+ strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
#endif
-#ifdef STRICT_RFC
- if( txt[0] ) strcat( txt, "+" );
- else strcat( txt, "-" );
- strcat( txt, "RFC" );
+#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 );
+
+ strlcat( NGIRCd_VersionAddition, "ZEROCONF", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef IDENTAUTH
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
#endif
#ifdef DEBUG
- if( txt[0] ) strcat( txt, "+" );
- else strcat( txt, "-" );
- strcat( txt, "DEBUG" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
#endif
#ifdef SNIFFER
- if( txt[0] ) strcat( txt, "+" );
- else strcat( txt, "-" );
- strcat( txt, "SNIFFER" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef STRICT_RFC
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
+#endif
+#ifdef IRCPLUS
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
+#endif
+
+ 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;
+
+ /* Close down all listening sockets */
+ Conn_ExitListeners( );
+
+ /* 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( );
+
+ /* 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( );
- sprintf( version, PACKAGE" version "VERSION"%s-"P_OSNAME"/"P_ARCHNAME, txt );
- return version;
-} /* NGIRCd_Version */
+ Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
+} /* NGIRCd_Rehash */
-LOCAL VOID Initialize_Signal_Handler( VOID )
+/**
+ * Initialize the signal handler.
+ */
+static 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 */
- saction.sa_handler = Signal_Handler;
- sigaction( SIGINT, &saction, NULL );
- sigaction( SIGQUIT, &saction, NULL );
- sigaction( SIGTERM, &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);
+
+ /* einige Signale ignorieren */
+ 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 ... */
- Log( LOG_WARNING, "Got signal %d, terminating now ...", Signal );
- NGIRCd_Quit = TRUE;
+ 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_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 */
-
- INT 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 %d!", Conf_ListenPorts[i] );
- }
-
- if( created < 1 )
- {
- Log( LOG_ALERT, "Server isn't listening on a single port!" );
- Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
- 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).\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" );
+ puts( " -d, --debug log extra debug messages" );
#endif
- puts( " -n, --nodaemon don't fork and don't detatch from controlling terminal" );
+ 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" );
+ puts( " -s, --sniffer enable network sniffer and display all IRC traffic" );
#endif
- puts( " --version output version information and exit" );
- puts( " --help display this help and 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- */
projects / ngircd-alex.git / blobdiff