X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fngircd.c;h=5637cb2578666c91ef0a9945231fc2b74686d97c;hp=191c216a1ac0df60fe38362338328c82e6500250;hb=13a5358a3d9a439e2f6d70f7770d4b7673bfbbc1;hpb=894cd2cd685ef17029c260c96801d082c71aac11 diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c index 191c216a..5637cb25 100644 --- a/src/ngircd/ngircd.c +++ b/src/ngircd/ngircd.c @@ -1,20 +1,21 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001-2005 by Alexander Barton (alex@barton.de) + * Copyright (c)2001-2013 Alexander Barton (alex@barton.de) and Contributors. * * 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 1.90 2005/02/09 09:52:58 alex Exp $"; +/** + * @file + * The main program, including the C function main() which is called + * by the loader of the operating system. + */ #include "imp.h" #include @@ -27,567 +28,473 @@ static char UNUSED id[] = "$Id: ngircd.c,v 1.90 2005/02/09 09:52:58 alex Exp $"; #include #include #include -#include +#include #include #include +#if defined(DEBUG) && defined(HAVE_MTRACE) +#include +#endif + #include "defines.h" -#include "resolve.h" #include "conn.h" -#include "client.h" +#include "class.h" +#include "conf-ssl.h" #include "channel.h" #include "conf.h" -#include "cvs-version.h" #include "lists.h" #include "log.h" #include "parse.h" +#include "sighandlers.h" +#include "io.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 )); +static void Show_Version PARAMS(( void )); +static void Show_Help PARAMS(( void )); + +static void Pidfile_Create PARAMS(( pid_t pid )); +static void Pidfile_Delete PARAMS(( void )); + +static void Fill_Version PARAMS(( void )); -LOCAL VOID Show_Version PARAMS(( VOID )); -LOCAL VOID Show_Help PARAMS(( VOID )); +static void Random_Init PARAMS(( void )); -LOCAL VOID Pidfile_Create PARAMS(( LONG )); -LOCAL VOID Pidfile_Delete PARAMS(( VOID )); +static void Setup_FDStreams PARAMS(( int fd )); -LOCAL VOID NGIRCd_FillVersion 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[] ) +main(int argc, const char *argv[]) { - struct passwd *pwd; - struct group *grp; - BOOLEAN ok, configtest = FALSE; - LONG pid, n; - INT i; + bool ok, configtest = false; + bool NGIRCd_NoDaemon = false; + int i; + size_t n; - umask( 0077 ); +#if defined(DEBUG) && defined(HAVE_MTRACE) + /* enable GNU libc memory tracing when running in debug mode + * and functionality available */ + mtrace(); +#endif + + umask(0077); - NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE; - NGIRCd_NoDaemon = NGIRCd_Passive = 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 )); - - NGIRCd_FillVersion( ); + 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 */ + Fill_Version(); - if( strcmp( argv[i], "--config" ) == 0 ) - { - if( i + 1 < argc ) - { + /* parse conmmand line */ + for (i = 1; i < argc; i++) { + ok = false; + if (argv[i][0] == '-' && argv[i][1] == '-') { + /* long 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 )); - + strlcpy(NGIRCd_ConfFile, argv[i+1], + sizeof(NGIRCd_ConfFile)); /* next parameter */ - i++; ok = TRUE; + i++; ok = true; } } - if( strcmp( argv[i], "--configtest" ) == 0 ) - { - configtest = TRUE; - 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; + 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], "--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], "--nodaemon") == 0) { + NGIRCd_NoDaemon = true; + ok = true; } - if( strcmp( argv[i], "--passive" ) == 0 ) - { - NGIRCd_Passive = 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; + if (strcmp(argv[i], "--sniffer") == 0) { + NGIRCd_Sniffer = true; + ok = true; } #endif - if( strcmp( argv[i], "--version" ) == 0 ) - { - Show_Version( ); - exit( 1 ); + 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; + else if(argv[i][0] == '-' && argv[i][1] != '-') { + /* short option */ + for (n = 1; n < strlen(argv[i]); n++) { + 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 )) - { + 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 )); + strlcpy(NGIRCd_ConfFile, argv[i+1], + sizeof(NGIRCd_ConfFile)); /* go to the following parameter */ - i++; n = (LONG)strlen( argv[i] ); - ok = TRUE; + i++; + n = strlen(argv[i]); + ok = true; } } - if( argv[i][n] == 'n' ) - { - NGIRCd_NoDaemon = TRUE; - ok = TRUE; + + if (argv[i][n] == 'h') { + Show_Version(); + puts(""); Show_Help(); puts(""); + exit(1); } - if( argv[i][n] == 'p' ) - { - NGIRCd_Passive = TRUE; - 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; + if (argv[i][n] == 's') { + NGIRCd_Sniffer = true; + ok = true; } #endif - if( argv[i][n] == 't' ) - { - configtest = TRUE; - ok = TRUE; + if (argv[i][n] == 't') { + configtest = true; + ok = true; + } + + 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 ); + 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 ); + 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 */ + /* Debug level for "VERSION" command */ NGIRCd_DebugLevel[0] = '\0'; #ifdef DEBUG - if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" ); + if (NGIRCd_Debug) + strcpy(NGIRCd_DebugLevel, "1"); #endif #ifdef SNIFFER - if( NGIRCd_Sniffer ) - { - NGIRCd_Debug = TRUE; - strcpy( NGIRCd_DebugLevel, "2" ); + 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( )); + if (configtest) { + Show_Version(); puts(""); + exit(Conf_Test()); } - - while( ! NGIRCd_SignalQuit ) - { + + while (!NGIRCd_SignalQuit) { /* Initialize global variables */ - NGIRCd_Start = time( NULL ); - (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start )); + NGIRCd_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; + NGIRCd_SignalRestart = false; + NGIRCd_SignalQuit = false; /* Initialize modules, part I */ - Log_Init( ); - Conf_Init( ); - - if( Conf_Chroot[0] ) - { - /* Chroot */ - if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno )); - - if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno )); - else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot ); + Log_Init(!NGIRCd_NoDaemon); + Random_Init(); + Conf_Init(); + Log_ReInit(); + + /* Initialize the "main program": chroot environment, user and + * group ID, ... */ + if (!NGIRCd_Init(NGIRCd_NoDaemon)) { + Log(LOG_ALERT, "Fatal: Initialization failed, exiting!"); + exit(1); } - if( Conf_GID != 0 ) - { - /* Set new group ID */ - if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno )); - } - if( Conf_UID != 0 ) - { - /* Set new user ID */ - if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno )); - } - - /* 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( "/" ); + /* Initialize modules, part II: these functions are eventually + * called with already dropped privileges ... */ + Channel_Init(); + Client_Init(); + Conn_Init(); + Class_Init(); + + if (!io_library_init(CONNECTION_POOL)) { + Log(LOG_ALERT, + "Fatal: Could not initialize IO routines: %s", + strerror(errno)); + exit(1); } - /* Create PID file */ - pid = (LONG) getpid( ); - Pidfile_Create( pid ); - - /* Show user, group, and PID of the running daemon */ - 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( ), pid); - - /* Change working directory to home directory of the user - * we are running as (when not running chroot()'ed!) */ - if( Conf_UID != 0 && ! Conf_Chroot[0] ) - { - struct passwd *pwd; - - pwd = getpwuid( Conf_UID ); - if( pwd != NULL ) - { - if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir ); - else Log( LOG_ERR, "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 ); + if (!Signals_Init()) { + Log(LOG_ALERT, + "Fatal: Could not set up signal handlers: %s", + strerror(errno)); + exit(1); } - /* Initialize modules, part II: these functions are eventually - * called with already dropped privileges ... */ - Resolve_Init( ); - Lists_Init( ); - Channel_Init( ); - Client_Init( ); -#ifdef RENDEZVOUS - Rendezvous_Init( ); -#endif - Conn_Init( ); - - /* Redirect stderr handle to "error file" for debugging. - * But don't try to write in the chroot jail, since it's more - * secure to have a chroot dir not writable by the daemon. - */ - if( ! Conf_Chroot[0] ) 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. */ + /* Create protocol and server identification. The syntax + * used by ngIRCd in PASS commands and the known "extended + * flags" are described in doc/Protocol.txt. */ #ifdef IRCPLUS - sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS ); + 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 - sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION ); -#endif - strcat( NGIRCd_ProtoID, " P" ); + strcat(NGIRCd_ProtoID, "Z"); +#endif + if (Conf_OperCanMode) + strcat(NGIRCd_ProtoID, "o"); +#else /* IRCPLUS */ + snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s", + PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION); +#endif /* IRCPLUS */ + strlcat(NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID); #ifdef ZLIB - strcat( NGIRCd_ProtoID, "Z" ); + strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID); #endif - Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID ); + LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID); - /* Vordefinierte Channels anlegen */ - Channel_InitPredefined( ); + 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 ); - Pidfile_Delete( ); - exit( 1 ); + 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); + Pidfile_Delete(); + exit(1); } - - /* Hauptschleife */ - Conn_Handler( ); - /* Alles abmelden */ - Conn_Exit( ); -#ifdef RENDEZVOUS - Rendezvous_Exit( ); -#endif - Client_Exit( ); - Channel_Exit( ); - Lists_Exit( ); - Log_Exit( ); + /* Main Run Loop */ + Conn_Handler(); - Pidfile_Delete( ); + Conn_Exit(); + Client_Exit(); + Channel_Exit(); + Class_Exit(); + Log_Exit(); + Signals_Exit(); } + Pidfile_Delete(); return 0; } /* main */ -LOCAL VOID -NGIRCd_FillVersion( VOID ) +/** + * Generate ngIRCd "version strings". + * + * The ngIRCd version information is generated once and then stored in the + * NGIRCd_Version and NGIRCd_VersionAddition string variables for further + * usage, for example by the IRC command "VERSION" and the --version command + * line switch. + */ +static void +Fill_Version(void) { NGIRCd_VersionAddition[0] = '\0'; -#ifdef SYSLOG - strcpy( NGIRCd_VersionAddition, "SYSLOG" ); -#endif -#ifdef ZLIB - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "ZLIB" ); -#endif -#ifdef TCPWRAP - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "TCPWRAP" ); -#endif -#ifdef RENDEZVOUS - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "RENDEZVOUS" ); -#endif -#ifdef IDENTAUTH - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "IDENT" ); +#ifdef ICONV + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "CHARCONV", + sizeof NGIRCd_VersionAddition); #endif #ifdef DEBUG - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "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] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "SNIFFER" ); -#endif -#ifdef STRICT_RFC - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "RFC" ); +#ifdef IDENTAUTH + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "IDENT", + 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 #ifdef IRCPLUS - if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" ); - strcat( NGIRCd_VersionAddition, "IRCPLUS" ); -#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); + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "IRCPLUS", + sizeof NGIRCd_VersionAddition); +#endif +#ifdef PAM + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "PAM", + sizeof NGIRCd_VersionAddition); #endif -} /* NGIRCd_FillVersion */ - - -GLOBAL VOID -NGIRCd_Rehash( VOID ) -{ - CHAR old_name[CLIENT_ID_LEN]; - - Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" ); - NGIRCd_SignalRehash = FALSE; - - /* Close down all listening sockets */ - Conn_ExitListeners( ); - - /* Remember old server name */ - strcpy( old_name, Conf_ServerName ); - - /* Re-read configuration ... */ - Conf_Rehash( ); - - /* Recover old server name: it can't be changed during run-time */ - if( strcmp( old_name, Conf_ServerName ) != 0 ) - { - strcpy( Conf_ServerName, old_name ); - Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." ); - } - - /* Create new pre-defined channels */ - Channel_InitPredefined( ); - - /* Start listening on sockets */ - Conn_InitListeners( ); - - /* Sync configuration with established connections */ - Conn_SyncServerStruct( ); - - Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." ); -} /* NGIRCd_Rehash */ - - -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; +#ifdef STRICT_RFC + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "RFC", + sizeof NGIRCd_VersionAddition); #endif -#ifdef SA_NOCLDWAIT - saction.sa_flags |= SA_NOCLDWAIT; +#ifdef SNIFFER + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "SNIFFER", + 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 - - /* 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 ); +#ifdef SYSLOG + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "SYSLOG", + sizeof NGIRCd_VersionAddition); #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 ); +#ifdef TCPWRAP + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "TCPWRAP", + sizeof NGIRCd_VersionAddition); #endif - } -} /* Signal_Handler */ - - -LOCAL VOID -Show_Version( VOID ) +#ifdef ZLIB + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "+", + sizeof NGIRCd_VersionAddition); + strlcat(NGIRCd_VersionAddition, "ZLIB", + sizeof NGIRCd_VersionAddition); +#endif + if (NGIRCd_VersionAddition[0]) + strlcat(NGIRCd_VersionAddition, "-", + sizeof(NGIRCd_VersionAddition)); + + strlcat(NGIRCd_VersionAddition, HOST_CPU, + sizeof(NGIRCd_VersionAddition)); + strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition)); + strlcat(NGIRCd_VersionAddition, HOST_VENDOR, + sizeof(NGIRCd_VersionAddition)); + strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition)); + strlcat(NGIRCd_VersionAddition, HOST_OS, + sizeof(NGIRCd_VersionAddition)); + + 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 ) { puts( NGIRCd_Version ); - puts( "Copyright (c)2001-2005 by Alexander Barton ()." ); - puts( "Homepage: \n" ); + puts( "Copyright (c)2001-2013 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 */ -LOCAL VOID -Show_Help( VOID ) +/** + * Display a short help text on the console. + * This help depends on the configuration of the executable and only shows + * options that are actually enabled. + */ +static void +Show_Help( void ) { #ifdef DEBUG puts( " -d, --debug log extra debug messages" ); #endif puts( " -f, --config 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" ); + 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( " -t, --configtest read, validate and display configuration; then exit" ); - puts( " --version output version information and exit" ); - puts( " --help display this help and exit" ); + puts( " -V, --version output version information and exit" ); + puts( " -h, --help display this help and exit" ); } /* Show_Help */ -LOCAL VOID -Pidfile_Delete( VOID ) +/** + * Delete the file containing the process ID (PID). + */ +static void +Pidfile_Delete( void ) { /* Pidfile configured? */ if( ! Conf_PidFile[0] ) return; @@ -601,10 +508,17 @@ Pidfile_Delete( VOID ) } /* Pidfile_Delete */ -LOCAL VOID -Pidfile_Create( LONG pid ) +/** + * 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) { - FILE *pidf; + int pidfd; + char pidbuf[64]; + int len; /* Pidfile configured? */ if( ! Conf_PidFile[0] ) return; @@ -613,20 +527,308 @@ Pidfile_Create( LONG pid ) Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile ); #endif - pidf = fopen( Conf_PidFile, "w" ); - - if( ! pidf ) - { + 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; } - if( fprintf( pidf, "%ld\n", pid ) < 0 ) - Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno )); + len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid); + if (len < 0 || len >= (int)sizeof pidbuf) { + Log(LOG_ERR, "Error converting process ID!"); + close(pidfd); + 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( fclose(pidf) != 0 ) - Log( LOG_ERR, "Error closing 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 appropriate file handles. + * + * @param fd The file handle stdin, stdout and stderr should be redirected to. + */ +static void +Setup_FDStreams(int fd) +{ + if (fd < 0) + return; + + 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 */ + + +#if !defined(SINGLE_USER_OS) + +/** + * Get user and group ID of unprivileged "nobody" user. + * + * @param uid User ID + * @param gid Group ID + * @return true on success. + */ +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; + } +#endif + + 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; +} /* NGIRCd_getNobodyID */ + +#endif + + +static bool +Random_Init_Kern(const char *file) +{ + unsigned int seed; + bool ret = false; + int fd = open(file, O_RDONLY); + if (fd >= 0) { + if (read(fd, &seed, sizeof(seed)) == sizeof(seed)) + ret = true; + close(fd); + srand(seed); + } + return ret; +} + +/** + * Initialize libc rand(3) number generator + */ +static void +Random_Init(void) +{ + if (Random_Init_Kern("/dev/urandom")) + return; + if (Random_Init_Kern("/dev/random")) + return; + if (Random_Init_Kern("/dev/arandom")) + return; + srand(rand() ^ (unsigned)getpid() ^ (unsigned)time(NULL)); +} + + +/** + * Initialize ngIRCd daemon. + * + * @param NGIRCd_NoDaemon Set to true if ngIRCd should run in the + * foreground (and not as a daemon). + * @return true on success. + */ +static bool +NGIRCd_Init(bool NGIRCd_NoDaemon) +{ + 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)); + } + + /* SSL initialization */ + if (!ConnSSL_InitLibrary()) { + Log(LOG_ERR, "Error during SSL initialization!"); + goto out; + } + + /* Change root */ + 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) { + 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 !defined(SINGLE_USER_OS) + /* Check user ID */ + if (Conf_UID == 0) { + pwd = getpwuid(0); + Log(LOG_INFO, + "ServerUID must not be %s(0), using \"nobody\" instead.", + pwd ? pwd->pw_name : "?"); + 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; + } + } + + /* Change group ID */ + if (getgid() != Conf_GID) { + if (setgid(Conf_GID) != 0) { + real_errno = errno; + grp = getgrgid(Conf_GID); + Log(LOG_ERR, "Can't change group ID to %s(%u): %s!", + grp ? grp->gr_name : "?", Conf_GID, + strerror(real_errno)); + if (real_errno != EPERM) + goto out; + } + if (setgroups(0, NULL) != 0) { + real_errno = errno; + Log(LOG_ERR, "Can't drop supplementary group IDs: %s!", + strerror(errno)); + if (real_errno != EPERM) + goto out; + } + } +#endif + + /* Change user ID */ + if (getuid() != Conf_UID) { + if (setuid(Conf_UID) != 0) { + real_errno = errno; + pwd = getpwuid(Conf_UID); + Log(LOG_ERR, "Can't change user ID to %s(%u): %s!", + pwd ? pwd->pw_name : "?", Conf_UID, + strerror(real_errno)); + if (real_errno != EPERM) + goto out; + } + } + + 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 */ +#ifdef HAVE_SETSID + (void)setsid(); +#else + setpgrp(0, getpid()); +#endif + 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); + } + 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 (NGIRCd_NoDaemon) + return true; + + if (pwd) { + if (chdir(pwd->pw_dir) == 0) + Log(LOG_DEBUG, + "Changed working directory to \"%s\" ...", + pwd->pw_dir); + else + Log(LOG_ERR, + "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; +} /* NGIRCd_Init */ + + /* -eof- */