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 1.36 2002/03/27 16:41:25 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, configtest = FALSE;
  56         INT32 pid, n;
  57         INT i;
  58
  59         NGIRCd_Restart = FALSE;
  60         NGIRCd_Quit = FALSE;
  61         NGIRCd_NoDaemon = FALSE;
  62         NGIRCd_Passive = FALSE;
  63 #ifdef DEBUG
  64         NGIRCd_Debug = FALSE;
  65 #endif
  66 #ifdef SNIFFER
  67         NGIRCd_Sniffer = FALSE;
  68 #endif
  69         strcpy( NGIRCd_ConfFile, CONFIG_FILE );
  70
  71         /* Kommandozeile parsen */
  72         for( i = 1; i < argc; i++ )
  73         {
  74                 ok = FALSE;
  75                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  76                 {
  77                         /* Lange Option */
  78
  79                         if( strcmp( argv[i], "--configtest" ) == 0 )
  80                         {
  81                                 configtest = TRUE;
  82                                 ok = TRUE;
  83                         }
  84 #ifdef DEBUG
  85                         if( strcmp( argv[i], "--debug" ) == 0 )
  86                         {
  87                                 NGIRCd_Debug = TRUE;
  88                                 ok = TRUE;
  89                         }
  90 #endif
  91                         if( strcmp( argv[i], "--help" ) == 0 )
  92                         {
  93                                 Show_Version( );
  94                                 puts( "" ); Show_Help( ); puts( "" );
  95                                 exit( 1 );
  96                         }
  97                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
  98                         {
  99                                 NGIRCd_NoDaemon = TRUE;
 100                                 ok = TRUE;
 101                         }
 102                         if( strcmp( argv[i], "--passive" ) == 0 )
 103                         {
 104                                 NGIRCd_Passive = TRUE;
 105                                 ok = TRUE;
 106                         }
 107 #ifdef SNIFFER
 108                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 109                         {
 110                                 NGIRCd_Sniffer = TRUE;
 111                                 ok = TRUE;
 112                         }
 113 #endif
 114                         if( strcmp( argv[i], "--version" ) == 0 )
 115                         {
 116                                 Show_Version( );
 117                                 exit( 1 );
 118                         }
 119                 }
 120                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 121                 {
 122                         /* Kurze Option */
 123
 124                         for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
 125                         {
 126                                 ok = FALSE;
 127 #ifdef DEBUG
 128                                 if( argv[i][n] == 'd' )
 129                                 {
 130                                         NGIRCd_Debug = TRUE;
 131                                         ok = TRUE;
 132                                 }
 133 #endif
 134                                 if( argv[i][n] == 'n' )
 135                                 {
 136                                         NGIRCd_NoDaemon = TRUE;
 137                                         ok = TRUE;
 138                                 }
 139                                 if( argv[i][n] == 'p' )
 140                                 {
 141                                         NGIRCd_Passive = TRUE;
 142                                         ok = TRUE;
 143                                 }
 144 #ifdef SNIFFER
 145                                 if( argv[i][n] == 's' )
 146                                 {
 147                                         NGIRCd_Sniffer = TRUE;
 148                                         ok = TRUE;
 149                                 }
 150 #endif
 151
 152                                 if( ! ok )
 153                                 {
 154                                         printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
 155                                         puts( "Try \""PACKAGE" --help\" for more information." );
 156                                         exit( 1 );
 157                                 }
 158                         }
 159
 160                 }
 161                 if( ! ok )
 162                 {
 163                         printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
 164                         puts( "Try \""PACKAGE" --help\" for more information." );
 165                         exit( 1 );
 166                 }
 167         }
 168
 169         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 170         strcpy( NGIRCd_DebugLevel, "" );
 171 #ifdef DEBUG
 172         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 173 #endif
 174 #ifdef SNIFFER
 175         if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
 176 #endif
 177
 178         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 179         if( configtest )
 180         {
 181                 Show_Version( ); puts( "" );
 182                 exit( Conf_Test( ));
 183         }
 184
 185         while( ! NGIRCd_Quit )
 186         {
 187                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 188                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 189                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 190                  * verhindert werden. */
 191                 if( ! NGIRCd_NoDaemon )
 192                 {
 193                         /* Daemon im Hintergrund erzeugen */
 194                         pid = (INT32)fork( );
 195                         if( pid > 0 )
 196                         {
 197                                 /* "alter" Prozess */
 198                                 exit( 0 );
 199                         }
 200                         if( pid < 0 )
 201                         {
 202                                 /* Fehler */
 203                                 printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
 204                                 exit( 1 );
 205                         }
 206
 207                         /* Child-Prozess initialisieren */
 208                         (VOID)setsid( );
 209                         chdir( "/" );
 210                 }
 211
 212                 /* Globale Variablen initialisieren */
 213                 NGIRCd_Start = time( NULL );
 214                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 215                 NGIRCd_Restart = FALSE;
 216                 NGIRCd_Quit = FALSE;
 217
 218                 /* Module initialisieren */
 219                 Log_Init( );
 220                 Conf_Init( );
 221                 Channel_Init( );
 222                 Client_Init( );
 223                 Conn_Init( );
 224
 225                 /* Signal-Handler initialisieren */
 226                 Initialize_Signal_Handler( );
 227
 228                 /* Listen-Ports initialisieren */
 229                 Initialize_Listen_Ports( );
 230
 231                 /* Hauptschleife */
 232                 while( TRUE )
 233                 {
 234                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 235                         Conn_Handler( 5 );
 236                 }
 237
 238                 /* Alles abmelden */
 239                 Conn_Exit( );
 240                 Client_Exit( );
 241                 Channel_Exit( );
 242                 Conf_Exit( );
 243                 Log_Exit( );
 244         }
 245
 246 #ifndef DEBUG
 247         /* aufraeumen */
 248         if( unlink( ERROR_FILE ) != 0 ) Log( LOG_ERR, "Can't delete \""ERROR_FILE"\": %s", strerror( errno ));
 249 #endif
 250
 251         return 0;
 252 } /* main */
 253
 254
 255 GLOBAL CHAR *NGIRCd_Version( VOID )
 256 {
 257         STATIC CHAR version[126];
 258
 259         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 260         return version;
 261 } /* NGIRCd_Version */
 262
 263
 264 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 265 {
 266         STATIC CHAR txt[64];
 267
 268         strcpy( txt, "" );
 269
 270 #ifdef USE_SYSLOG
 271         if( txt[0] ) strcat( txt, "+" );
 272         strcat( txt, "SYSLOG" );
 273 #endif
 274 #ifdef STRICT_RFC
 275         if( txt[0] ) strcat( txt, "+" );
 276         strcat( txt, "RFC" );
 277 #endif
 278 #ifdef DEBUG
 279         if( txt[0] ) strcat( txt, "+" );
 280         strcat( txt, "DEBUG" );
 281 #endif
 282 #ifdef SNIFFER
 283         if( txt[0] ) strcat( txt, "+" );
 284         strcat( txt, "SNIFFER" );
 285 #endif
 286
 287         if( txt[0] ) strcat( txt, "-" );
 288         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 289
 290         return txt;
 291 } /* NGIRCd_VersionAddition */
 292
 293
 294 LOCAL VOID Initialize_Signal_Handler( VOID )
 295 {
 296         /* Signal-Handler initialisieren: einige Signale
 297          * werden ignoriert, andere speziell behandelt. */
 298
 299 #ifdef HAVE_SIGACTION
 300         /* sigaction() ist vorhanden */
 301
 302         struct sigaction saction;
 303
 304         /* Signal-Struktur initialisieren */
 305         memset( &saction, 0, sizeof( saction ));
 306         saction.sa_handler = Signal_Handler;
 307 #ifdef SA_RESTART
 308         saction.sa_flags |= SA_RESTART;
 309 #endif
 310 #ifdef SA_NOCLDWAIT
 311         saction.sa_flags |= SA_NOCLDWAIT;
 312 #endif
 313
 314         /* Signal-Handler einhaengen */
 315         sigaction( SIGINT, &saction, NULL );
 316         sigaction( SIGQUIT, &saction, NULL );
 317         sigaction( SIGTERM, &saction, NULL);
 318         sigaction( SIGHUP, &saction, NULL);
 319         sigaction( SIGCHLD, &saction, NULL);
 320
 321         /* einige Signale ignorieren */
 322         saction.sa_handler = SIG_IGN;
 323         sigaction( SIGPIPE, &saction, NULL );
 324 #else
 325         /* kein sigaction() vorhanden */
 326
 327         /* Signal-Handler einhaengen */
 328         signal( SIGINT, Signal_Handler );
 329         signal( SIGQUIT, Signal_Handler );
 330         signal( SIGTERM, Signal_Handler );
 331         signal( SIGHUP, Signal_Handler );
 332         signal( SIGCHLD, Signal_Handler );
 333
 334         /* einige Signale ignorieren */
 335         signal( SIGPIPE, SIG_IGN );
 336 #endif
 337 } /* Initialize_Signal_Handler */
 338
 339
 340 LOCAL VOID Signal_Handler( INT Signal )
 341 {
 342         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 343          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 344          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 345
 346         switch( Signal )
 347         {
 348                 case SIGTERM:
 349                 case SIGINT:
 350                 case SIGQUIT:
 351                         /* wir soll(t)en uns wohl beenden ... */
 352                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 353                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 354                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 355                         NGIRCd_Quit = TRUE;
 356                         break;
 357                 case SIGHUP:
 358                         /* neu starten */
 359                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 360                         NGIRCd_Restart = TRUE;
 361                         break;
 362                 case SIGCHLD:
 363                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 364                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 365                         break;
 366                 default:
 367                         /* unbekanntes bzw. unbehandeltes Signal */
 368                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 369         }
 370 } /* Signal_Handler */
 371
 372
 373 LOCAL VOID Initialize_Listen_Ports( VOID )
 374 {
 375         /* Ports, auf denen der Server Verbindungen entgegennehmen
 376          * soll, initialisieren */
 377
 378         INT created, i;
 379
 380         created = 0;
 381         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 382         {
 383                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 384                 else Log( LOG_ERR, "Can't listen on port %d!", Conf_ListenPorts[i] );
 385         }
 386
 387         if( created < 1 )
 388         {
 389                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 390                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 391                 exit( 1 );
 392         }
 393 } /* Initialize_Listen_Ports */
 394
 395
 396 LOCAL VOID Show_Version( VOID )
 397 {
 398         puts( NGIRCd_Version( ));
 399         puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
 400         puts( "This is free software; see the source for copying conditions. There is NO" );
 401         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 402 } /* Show_Version */
 403
 404
 405 LOCAL VOID Show_Help( VOID )
 406 {
 407 #ifdef DEBUG
 408         puts( "  -d, --debug       log extra debug messages" );
 409 #endif
 410         puts( "  -n, --nodaemon    don't fork and don't detatch from controlling terminal" );
 411         puts( "  -p, --passive     disable automatic connections to other servers" );
 412 #ifdef SNIFFER
 413         puts( "  -s, --sniffer     enable network sniffer and display all IRC traffic" );
 414 #endif
 415         puts( "      --configtest  read, validate and display configuration; then exit" );
 416         puts( "      --version     output version information and exit" );
 417         puts( "      --help        display this help and exit" );
 418 } /* Show_Help */
 419
 420
 421 /* -eof- */