src/ngircd/ngircd.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
   4  *
   5  * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
   6  * der GNU General Public License (GPL), wie von der Free Software Foundation
   7  * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
   8  * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
   9  * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
  10  * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
  11  *
  12  * $Id: ngircd.c,v 1.34 2002/03/12 22:08:24 alex Exp $
  13  *
  14  * ngircd.c: Hier beginnt alles ;-)
  15  */
  16
  17
  18 #include "portab.h"
  19
  20 #include "imp.h"
  21 #include <assert.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <signal.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/types.h>
  28 #include <sys/wait.h>
  29 #include <time.h>
  30
  31 #include "channel.h"
  32 #include "client.h"
  33 #include "conf.h"
  34 #include "conn.h"
  35 #include "defines.h"
  36 #include "irc.h"
  37 #include "log.h"
  38 #include "parse.h"
  39
  40 #include "exp.h"
  41 #include "ngircd.h"
  42
  43
  44 LOCAL VOID Initialize_Signal_Handler( VOID );
  45 LOCAL VOID Signal_Handler( INT Signal );
  46
  47 LOCAL VOID Initialize_Listen_Ports( VOID );
  48
  49 LOCAL VOID Show_Version( VOID );
  50 LOCAL VOID Show_Help( VOID );
  51
  52
  53 GLOBAL INT main( INT argc, CONST CHAR *argv[] )
  54 {
  55         BOOLEAN ok;
  56         INT pid, i, n;
  57
  58         NGIRCd_Restart = FALSE;
  59         NGIRCd_Quit = FALSE;
  60         NGIRCd_NoDaemon = FALSE;
  61         NGIRCd_Passive = FALSE;
  62 #ifdef DEBUG
  63         NGIRCd_Debug = FALSE;
  64 #endif
  65 #ifdef SNIFFER
  66         NGIRCd_Sniffer = FALSE;
  67 #endif
  68
  69         /* Kommandozeile parsen */
  70         for( i = 1; i < argc; i++ )
  71         {
  72                 ok = FALSE;
  73                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  74                 {
  75                         /* Lange Option */
  76
  77 #ifdef DEBUG
  78                         if( strcmp( argv[i], "--debug" ) == 0 )
  79                         {
  80                                 NGIRCd_Debug = TRUE;
  81                                 ok = TRUE;
  82                         }
  83 #endif
  84                         if( strcmp( argv[i], "--help" ) == 0 )
  85                         {
  86                                 Show_Version( ); puts( "" );
  87                                 Show_Help( ); puts( "" );
  88                                 exit( 1 );
  89                         }
  90                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
  91                         {
  92                                 NGIRCd_NoDaemon = TRUE;
  93                                 ok = TRUE;
  94                         }
  95                         if( strcmp( argv[i], "--passive" ) == 0 )
  96                         {
  97                                 NGIRCd_Passive = TRUE;
  98                                 ok = TRUE;
  99                         }
 100 #ifdef SNIFFER
 101                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 102                         {
 103                                 NGIRCd_Sniffer = TRUE;
 104                                 ok = TRUE;
 105                         }
 106 #endif
 107                         if( strcmp( argv[i], "--version" ) == 0 )
 108                         {
 109                                 Show_Version( );
 110                                 exit( 1 );
 111                         }
 112                 }
 113                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 114                 {
 115                         /* Kurze Option */
 116
 117                         for( n = 1; n < strlen( argv[i] ); n++ )
 118                         {
 119                                 ok = FALSE;
 120 #ifdef DEBUG
 121                                 if( argv[i][n] == 'd' )
 122                                 {
 123                                         NGIRCd_Debug = TRUE;
 124                                         ok = TRUE;
 125                                 }
 126 #endif
 127                                 if( argv[i][n] == 'n' )
 128                                 {
 129                                         NGIRCd_NoDaemon = TRUE;
 130                                         ok = TRUE;
 131                                 }
 132                                 if( argv[i][n] == 'p' )
 133                                 {
 134                                         NGIRCd_Passive = TRUE;
 135                                         ok = TRUE;
 136                                 }
 137 #ifdef SNIFFER
 138                                 if( argv[i][n] == 's' )
 139                                 {
 140                                         NGIRCd_Sniffer = TRUE;
 141                                         ok = TRUE;
 142                                 }
 143 #endif
 144
 145                                 if( ! ok )
 146                                 {
 147                                         printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
 148                                         puts( "Try \""PACKAGE" --help\" for more information." );
 149                                         exit( 1 );
 150                                 }
 151                         }
 152
 153                 }
 154                 if( ! ok )
 155                 {
 156                         printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
 157                         puts( "Try \""PACKAGE" --help\" for more information." );
 158                         exit( 1 );
 159                 }
 160         }
 161
 162         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 163         strcpy( NGIRCd_DebugLevel, "" );
 164 #ifdef DEBUG
 165         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 166 #endif
 167 #ifdef SNIFFER
 168         if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
 169 #endif
 170
 171         while( ! NGIRCd_Quit )
 172         {
 173                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 174                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 175                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 176                  * verhindert werden. */
 177                 if( ! NGIRCd_NoDaemon )
 178                 {
 179                         /* Daemon im Hintergrund erzeugen */
 180                         pid = fork( );
 181                         if( pid > 0 )
 182                         {
 183                                 /* "alter" Prozess */
 184                                 exit( 0 );
 185                         }
 186                         if( pid < 0 )
 187                         {
 188                                 /* Fehler */
 189                                 printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
 190                                 exit( 1 );
 191                         }
 192
 193                         /* Child-Prozess initialisieren */
 194                         setsid( );
 195                         chdir( "/" );
 196                 }
 197
 198                 /* Globale Variablen initialisieren */
 199                 NGIRCd_Start = time( NULL );
 200                 strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 201                 NGIRCd_Restart = FALSE;
 202                 NGIRCd_Quit = FALSE;
 203
 204                 /* Module initialisieren */
 205                 Log_Init( );
 206                 Conf_Init( );
 207                 Channel_Init( );
 208                 Client_Init( );
 209                 Conn_Init( );
 210
 211                 /* Signal-Handler initialisieren */
 212                 Initialize_Signal_Handler( );
 213
 214                 /* Listen-Ports initialisieren */
 215                 Initialize_Listen_Ports( );
 216
 217                 /* Hauptschleife */
 218                 while( TRUE )
 219                 {
 220                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 221                         Conn_Handler( 5 );
 222                 }
 223
 224                 /* Alles abmelden */
 225                 Conn_Exit( );
 226                 Client_Exit( );
 227                 Channel_Exit( );
 228                 Conf_Exit( );
 229                 Log_Exit( );
 230         }
 231
 232 #ifndef DEBUG
 233         /* aufraeumen */
 234         if( unlink( ERROR_FILE ) != 0 ) Log( LOG_ERR, "Can't delete \""ERROR_FILE"\": %s", strerror( errno ));
 235 #endif
 236
 237         return 0;
 238 } /* main */
 239
 240
 241 GLOBAL CHAR *NGIRCd_Version( VOID )
 242 {
 243         STATIC CHAR version[126];
 244
 245         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 246         return version;
 247 } /* NGIRCd_Version */
 248
 249
 250 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 251 {
 252         STATIC CHAR txt[64];
 253
 254         strcpy( txt, "" );
 255
 256 #ifdef USE_SYSLOG
 257         if( txt[0] ) strcat( txt, "+" );
 258         strcat( txt, "SYSLOG" );
 259 #endif
 260 #ifdef STRICT_RFC
 261         if( txt[0] ) strcat( txt, "+" );
 262         strcat( txt, "RFC" );
 263 #endif
 264 #ifdef DEBUG
 265         if( txt[0] ) strcat( txt, "+" );
 266         strcat( txt, "DEBUG" );
 267 #endif
 268 #ifdef SNIFFER
 269         if( txt[0] ) strcat( txt, "+" );
 270         strcat( txt, "SNIFFER" );
 271 #endif
 272
 273         if( txt[0] ) strcat( txt, "-" );
 274         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 275
 276         return txt;
 277 } /* NGIRCd_VersionAddition */
 278
 279
 280 LOCAL VOID Initialize_Signal_Handler( VOID )
 281 {
 282         /* Signal-Handler initialisieren: einige Signale
 283          * werden ignoriert, andere speziell behandelt. */
 284
 285 #ifdef HAVE_SIGACTION
 286         /* sigaction() ist vorhanden */
 287
 288         struct sigaction saction;
 289
 290         /* Signal-Struktur initialisieren */
 291         memset( &saction, 0, sizeof( saction ));
 292         saction.sa_handler = Signal_Handler;
 293 #ifdef SA_RESTART
 294         saction.sa_flags |= SA_RESTART;
 295 #endif
 296 #ifdef SA_NOCLDWAIT
 297         saction.sa_flags |= SA_NOCLDWAIT;
 298 #endif
 299
 300         /* Signal-Handler einhaengen */
 301         sigaction( SIGINT, &saction, NULL );
 302         sigaction( SIGQUIT, &saction, NULL );
 303         sigaction( SIGTERM, &saction, NULL);
 304         sigaction( SIGHUP, &saction, NULL);
 305         sigaction( SIGCHLD, &saction, NULL);
 306
 307         /* einige Signale ignorieren */
 308         saction.sa_handler = SIG_IGN;
 309         sigaction( SIGPIPE, &saction, NULL );
 310 #else
 311         /* kein sigaction() vorhanden */
 312
 313         /* Signal-Handler einhaengen */
 314         signal( SIGINT, Signal_Handler );
 315         signal( SIGQUIT, Signal_Handler );
 316         signal( SIGTERM, Signal_Handler );
 317         signal( SIGHUP, Signal_Handler );
 318         signal( SIGCHLD, Signal_Handler );
 319
 320         /* einige Signale ignorieren */
 321         signal( SIGPIPE, SIG_IGN );
 322 #endif
 323 } /* Initialize_Signal_Handler */
 324
 325
 326 LOCAL VOID Signal_Handler( INT Signal )
 327 {
 328         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 329          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 330          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 331
 332         switch( Signal )
 333         {
 334                 case SIGTERM:
 335                 case SIGINT:
 336                 case SIGQUIT:
 337                         /* wir soll(t)en uns wohl beenden ... */
 338                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 339                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 340                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 341                         NGIRCd_Quit = TRUE;
 342                         break;
 343                 case SIGHUP:
 344                         /* neu starten */
 345                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 346                         NGIRCd_Restart = TRUE;
 347                         break;
 348                 case SIGCHLD:
 349                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 350                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 351                         break;
 352                 default:
 353                         /* unbekanntes bzw. unbehandeltes Signal */
 354                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 355         }
 356 } /* Signal_Handler */
 357
 358
 359 LOCAL VOID Initialize_Listen_Ports( VOID )
 360 {
 361         /* Ports, auf denen der Server Verbindungen entgegennehmen
 362          * soll, initialisieren */
 363
 364         INT created, i;
 365
 366         created = 0;
 367         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 368         {
 369                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 370                 else Log( LOG_ERR, "Can't listen on port %d!", Conf_ListenPorts[i] );
 371         }
 372
 373         if( created < 1 )
 374         {
 375                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 376                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 377                 exit( 1 );
 378         }
 379 } /* Initialize_Listen_Ports */
 380
 381
 382 LOCAL VOID Show_Version( VOID )
 383 {
 384         puts( NGIRCd_Version( ));
 385         puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
 386         puts( "This is free software; see the source for copying conditions. There is NO" );
 387         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 388 } /* Show_Version */
 389
 390
 391 LOCAL VOID Show_Help( VOID )
 392 {
 393         puts( "Compile-time defaults:\n" );
 394         puts( "  - configuration: "CONFIG_FILE );
 395         puts( "  - MOTD file: "MOTD_FILE );
 396         puts( "  - server error log: "ERROR_FILE"\n" );
 397         puts( "Run-time options:\n" );
 398 #ifdef DEBUG
 399         puts( "  -d, --debug       log extra debug messages" );
 400 #endif
 401         puts( "  -n, --nodaemon    don't fork and don't detatch from controlling terminal" );
 402         puts( "  -p, --passive     disable automatic connections to other servers" );
 403 #ifdef SNIFFER
 404         puts( "  -s, --sniffer     enable network sniffer and display all IRC traffic" );
 405 #endif
 406         puts( "      --version     output version information and exit" );
 407         puts( "      --help        display this help and exit" );
 408 } /* Show_Help */
 409
 410
 411 /* -eof- */