X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fngircd.c;h=ecc9d332a1a77675b5889497366e68c4c8b3d955;hp=57f4d4608124910ce7e50ec60395ba8bce8d2975;hb=6d11fb149707194e986b0d64af3d44f21e158fcc;hpb=3fbbfe44edbdc62afb604e3126ae8a2c88d424ee diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c index 57f4d460..63fc64bf 100644 --- a/src/ngircd/ngircd.c +++ b/src/ngircd/ngircd.c @@ -1,221 +1,229 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de) + * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors. * - * 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 1.23 2002/02/17 23:40:21 alex Exp $ - * - * ngircd.c: Hier beginnt alles ;-) - * - * $Log: ngircd.c,v $ - * Revision 1.23 2002/02/17 23:40:21 alex - * - neue Funktion NGIRCd_VersionAddition(). NGIRCd_Version() aufgespaltet. - * - * Revision 1.22 2002/01/22 17:15:39 alex - * - die Fehlermeldung "interrupted system call" sollte nicht mehr auftreten. - * - * 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 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 -#include "global.h" - -#include +/** + * @file + * The main program, including the C function main() which is called + * by the loader of the operating system. + */ +#include "imp.h" #include #include #include +#include #include #include #include -#include -#include #include +#include +#include +#include +#include +#include + +#if defined(DEBUG) && defined(HAVE_MTRACE) +#include +#endif +#include "defines.h" +#include "conn.h" +#include "conf-ssl.h" #include "channel.h" -#include "client.h" #include "conf.h" -#include "conn.h" -#include "irc.h" +#include "lists.h" #include "log.h" #include "parse.h" +#include "sighandlers.h" +#include "io.h" +#include "irc.h" + +#ifdef ZEROCONF +#include "rendezvous.h" +#endif -#include +#include "exp.h" #include "ngircd.h" -LOCAL VOID Initialize_Signal_Handler( VOID ); -LOCAL VOID Signal_Handler( INT Signal ); +static void Show_Version PARAMS(( void )); +static void Show_Help PARAMS(( void )); -LOCAL VOID Initialize_Listen_Ports( VOID ); +static void Pidfile_Create PARAMS(( pid_t pid )); +static void Pidfile_Delete PARAMS(( void )); -LOCAL VOID Show_Version( VOID ); -LOCAL VOID Show_Help( VOID ); +static void Fill_Version PARAMS(( void )); +static void Setup_FDStreams PARAMS(( int fd )); -GLOBAL INT main( INT argc, CONST CHAR *argv[] ) +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; + +#if defined(DEBUG) && defined(HAVE_MTRACE) + /* enable GNU libc memory tracing when running in debug mode + * and functionality available */ + mtrace(); +#endif - /* Datentypen der portab-Library ueberpruefen */ - portab_check_types( ); + umask( 0077 ); - NGIRCd_Restart = FALSE; - NGIRCd_Quit = FALSE; - NGIRCd_NoDaemon = FALSE; + NGIRCd_SignalQuit = NGIRCd_SignalRestart = 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 */ + /* parse conmmand line */ 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 ) + /* long option */ + 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 */ - + /* short 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; + 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 = strlen( argv[i] ); + ok = true; + } + } + + if (argv[i][n] == 'h') { + Show_Version(); + puts(""); Show_Help(); puts(""); + exit(1); + } + + 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; + if (argv[i][n] == 's') { + NGIRCd_Sniffer = true; + ok = true; } #endif - if( argv[i][n] == 'n' ) - { - NGIRCd_NoDaemon = TRUE; - ok = TRUE; + if (argv[i][n] == 't') { + configtest = true; + ok = true; } - if( ! ok ) - { - printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] ); - puts( "Try \""PACKAGE" --help\" for more information." ); + if (argv[i][n] == 'V') { + Show_Version(); + exit(1); + } + + 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 ); } } @@ -223,219 +231,493 @@ GLOBAL INT main( INT argc, CONST CHAR *argv[] ) } 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 (for IRCs "VERSION" command) */ + 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 + + 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_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( ); - /* Signal-Handler initialisieren */ - Initialize_Signal_Handler( ); + if (!io_library_init(CONNECTION_POOL)) { + Log(LOG_ALERT, "Fatal: Cannot initialize IO routines: %s", strerror(errno)); + exit(1); + } - /* Listen-Ports initialisieren */ - Initialize_Listen_Ports( ); + if (!Signals_Init()) { + Log(LOG_ALERT, "Fatal: Could not set up signal handlers: %s", strerror(errno)); + exit(1); + } - /* Hauptschleife */ - while( TRUE ) + /* + * create protocol and server identification. + * The syntax used by ngIRCd in PASS commands and the extended flags + * are described in doc/Protocol.txt + */ +#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 + LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID); + + Channel_InitPredefined( ); + + 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]; + NGIRCd_VersionAddition[0] = '\0'; - sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( )); - return version; -} /* NGIRCd_Version */ +#ifdef SYSLOG + strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition ); +#endif +#ifdef ZLIB + if( NGIRCd_VersionAddition[0] ) + strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition ); + strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition ); +#endif +#ifdef SSL_SUPPORT + if ( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition ); + strlcat( NGIRCd_VersionAddition, "SSL", 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 ); + 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 PAM + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "PAM", sizeof NGIRCd_VersionAddition); +#endif +#ifdef DEBUG + if( NGIRCd_VersionAddition[0] ) + strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition ); + strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition ); +#endif +#ifdef 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 +#ifdef WANT_IPV6 + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", sizeof(NGIRCd_VersionAddition)); + strlcat(NGIRCd_VersionAddition, "IPv6", 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 )); -GLOBAL CHAR *NGIRCd_VersionAddition( VOID ) + snprintf(NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", + PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition); + } /* Fill_Version */ + + +/** + * Display copyright and version information of ngIRCd on the console. + */ +static void +Show_Version( void ) { - STATIC CHAR txt[64]; + puts( NGIRCd_Version ); + puts( "Copyright (c)2001-2011 Alexander Barton () and Contributors." ); + puts( "Homepage: \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 */ - strcpy( txt, "" ); -#ifdef USE_SYSLOG - if( txt[0] ) strcat( txt, "+" ); - strcat( txt, "SYSLOG" ); -#endif -#ifdef STRICT_RFC - if( txt[0] ) strcat( txt, "+" ); - strcat( txt, "RFC" ); -#endif +/** + * 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 - if( txt[0] ) strcat( txt, "+" ); - strcat( txt, "DEBUG" ); + puts( " -d, --debug log extra debug messages" ); #endif + puts( " -f, --config use file 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 - if( txt[0] ) strcat( txt, "+" ); - strcat( txt, "SNIFFER" ); + puts( " -s, --sniffer enable network sniffer and display all IRC traffic" ); #endif + puts( " -t, --configtest read, validate and display configuration; then exit" ); + puts( " -V, --version output version information and exit" ); + puts( " -h, --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; - if( txt[0] ) strcat( txt, "-" ); - strcat( txt, P_OSNAME"/"P_ARCHNAME ); +#ifdef DEBUG + Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile ); +#endif - return txt; -} /* NGIRCd_VersionAddition */ + if( unlink( Conf_PidFile )) + Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno )); +} /* Pidfile_Delete */ -LOCAL VOID Initialize_Signal_Handler( VOID ) +/** + * 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) { - /* Signal-Handler initialisieren: einige Signale - * werden ignoriert, andere speziell behandelt. */ + int pidfd; + char pidbuf[64]; + int len; - struct sigaction saction; + /* Pidfile configured? */ + if( ! Conf_PidFile[0] ) return; - /* Signal-Struktur initialisieren */ - memset( &saction, 0, sizeof( saction )); - saction.sa_handler = Signal_Handler; - saction.sa_flags = SA_RESTART; +#ifdef DEBUG + Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile ); +#endif - /* Signal-Handler einhaengen */ - sigaction( SIGINT, &saction, NULL ); - sigaction( SIGQUIT, &saction, NULL ); - sigaction( SIGTERM, &saction, NULL); - sigaction( SIGHUP, &saction, NULL); - sigaction( SIGCHLD, &saction, NULL); + 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 )); - /* einige Signale ignorieren */ - saction.sa_handler = SIG_IGN; - sigaction( SIGPIPE, &saction, NULL ); -} /* Initialize_Signal_Handler */ + if( close(pidfd) != 0 ) + Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno )); +} /* Pidfile_Create */ -LOCAL VOID Signal_Handler( INT Signal ) +/** + * Redirect stdin, stdout and stderr to apropriate file handles. + */ +static void +Setup_FDStreams(int fd) { - /* 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. */ + if (fd < 0) + return; - 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; - break; - case SIGHUP: - /* neu starten */ - Log( LOG_WARNING, "Got HUP signal, restarting now ..." ); - NGIRCd_Restart = TRUE; - break; - case SIGCHLD: - /* Child-Prozess wurde beendet. Zombies vermeiden: */ - while( waitpid( -1, NULL, WNOHANG ) > 0); - break; - default: - /* unbekanntes bzw. unbehandeltes Signal */ - Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal ); + fflush(stdout); + fflush(stderr); + + /* Create new stdin(0), stdout(1) and stderr(2) descriptors */ + dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 ); +} /* Setup_FDStreams */ + + +static bool +NGIRCd_getNobodyID(uid_t *uid, gid_t *gid ) +{ + struct passwd *pwd; + +#ifdef __CYGWIN__ + /* Cygwin kludge. + * It can return EINVAL instead of EPERM + * so, if we are already unprivileged, + * use id of current user. + */ + if (geteuid() && getuid()) { + *uid = getuid(); + *gid = getgid(); + return true; } -} /* Signal_Handler */ +#endif + + pwd = getpwnam("nobody"); + if (!pwd) return false; + if ( !pwd->pw_uid || !pwd->pw_gid) + return false; -LOCAL VOID Initialize_Listen_Ports( VOID ) + *uid = pwd->pw_uid; + *gid = pwd->pw_gid; + endpwent(); + + return true; +} + + +static bool +NGIRCd_Init( bool NGIRCd_NoDaemon ) { - /* Ports, auf denen der Server Verbindungen entgegennehmen - * soll, initialisieren */ - - INT created, i; + static bool initialized; + bool chrooted = false; + struct passwd *pwd; + struct group *grp; + int real_errno, fd = -1; + pid_t pid; + + if (initialized) + return true; + + if (!NGIRCd_NoDaemon) { + /* open /dev/null before chroot() */ + fd = open( "/dev/null", O_RDWR); + if (fd < 0) + Log(LOG_WARNING, "Could not open /dev/null: %s", strerror(errno)); + } - 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 (!ConnSSL_InitLibrary()) + Log(LOG_WARNING, + "Warning: Error during SSL initialization, continuing ..."); + + if( Conf_Chroot[0] ) { + if( chdir( Conf_Chroot ) != 0 ) { + Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno )); + goto out; + } + + if( chroot( Conf_Chroot ) != 0 ) { + if (errno != EPERM) { + Log( LOG_ERR, "Can't change root directory to \"%s\": %s", + Conf_Chroot, strerror( errno )); + goto out; + } + } else { + chrooted = true; + Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot ); + } } - 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 ); + 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" ); + goto out; + } } -} /* Initialize_Listen_Ports */ + 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) + goto out; + } + } -LOCAL VOID Show_Version( VOID ) -{ - puts( NGIRCd_Version( )); - puts( "Copyright (c)2001,2002 by Alexander Barton (alex@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 */ + 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) + goto out; + } + } + initialized = true; -LOCAL VOID Show_Help( VOID ) -{ -#ifdef DEBUG - puts( " -d, --debug log extra debug messages" ); -#endif - puts( " -n, --nodaemon don't fork and don't detatch from controlling terminal" ); -#ifdef SNIFFER - puts( " -s, --sniffer enable network sniffer and display all IRC traffic" ); + /* 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 */ +#ifndef NeXT + (void)setsid( ); +#else + setpgrp(0, getpid()); #endif - puts( " --version output version information and exit" ); - puts( " --help display this help and exit" ); -} /* Show_Help */ + if (chdir( "/" ) != 0) + Log(LOG_ERR, "Can't change directory to '/': %s", + strerror(errno)); + + /* Detach stdin, stdout and stderr */ + Setup_FDStreams(fd); + if (fd > 2) { + close(fd); + fd = -1; + } + } + 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", (long)Conf_UID, + grp ? grp->gr_name : "unknown", (long)Conf_GID, (long)pid); + + if (chrooted) { + Log(LOG_INFO, "Running with root directory \"%s\".", + Conf_Chroot ); + return true; + } else + Log(LOG_INFO, "Not running with changed root directory."); + + /* 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; + out: + if (fd > 2) + close(fd); + return false; +} /* -eof- */