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 1.47 2002/05/30 16:52:21 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 <stdlib.h>
  25 #include <signal.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <time.h>
  31
  32 #include "resolve.h"
  33 #include "conn.h"
  34 #include "client.h"
  35 #include "channel.h"
  36 #include "conf.h"
  37 #include "defines.h"
  38 #include "lists.h"
  39 #include "log.h"
  40 #include "parse.h"
  41 #include "irc.h"
  42
  43 #include "exp.h"
  44 #include "ngircd.h"
  45
  46
  47 LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
  48 LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
  49
  50 LOCAL VOID Initialize_Listen_Ports PARAMS(( VOID ));
  51
  52 LOCAL VOID Show_Version PARAMS(( VOID ));
  53 LOCAL VOID Show_Help PARAMS(( VOID ));
  54
  55
  56 GLOBAL int
  57 main( int argc, const char *argv[] )
  58 {
  59         BOOLEAN ok, configtest = FALSE;
  60         INT32 pid, n;
  61         INT i;
  62
  63         NGIRCd_Restart = FALSE;
  64         NGIRCd_Quit = FALSE;
  65         NGIRCd_NoDaemon = FALSE;
  66         NGIRCd_Passive = FALSE;
  67 #ifdef DEBUG
  68         NGIRCd_Debug = FALSE;
  69 #endif
  70 #ifdef SNIFFER
  71         NGIRCd_Sniffer = FALSE;
  72 #endif
  73         strcpy( NGIRCd_ConfFile, CONFIG_FILE );
  74
  75         /* Kommandozeile parsen */
  76         for( i = 1; i < argc; i++ )
  77         {
  78                 ok = FALSE;
  79                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  80                 {
  81                         /* Lange Option */
  82
  83                         if( strcmp( argv[i], "--config" ) == 0 )
  84                         {
  85                                 if( i + 1 < argc )
  86                                 {
  87                                         /* Ok, danach kommt noch ein Parameter */
  88                                         strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
  89                                         NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
  90
  91                                         /* zum uebernaechsten Parameter */
  92                                         i++; ok = TRUE;
  93                                 }
  94                         }
  95                         if( strcmp( argv[i], "--configtest" ) == 0 )
  96                         {
  97                                 configtest = TRUE;
  98                                 ok = TRUE;
  99                         }
 100 #ifdef DEBUG
 101                         if( strcmp( argv[i], "--debug" ) == 0 )
 102                         {
 103                                 NGIRCd_Debug = TRUE;
 104                                 ok = TRUE;
 105                         }
 106 #endif
 107                         if( strcmp( argv[i], "--help" ) == 0 )
 108                         {
 109                                 Show_Version( );
 110                                 puts( "" ); Show_Help( ); puts( "" );
 111                                 exit( 1 );
 112                         }
 113                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 114                         {
 115                                 NGIRCd_NoDaemon = TRUE;
 116                                 ok = TRUE;
 117                         }
 118                         if( strcmp( argv[i], "--passive" ) == 0 )
 119                         {
 120                                 NGIRCd_Passive = TRUE;
 121                                 ok = TRUE;
 122                         }
 123 #ifdef SNIFFER
 124                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 125                         {
 126                                 NGIRCd_Sniffer = TRUE;
 127                                 ok = TRUE;
 128                         }
 129 #endif
 130                         if( strcmp( argv[i], "--version" ) == 0 )
 131                         {
 132                                 Show_Version( );
 133                                 exit( 1 );
 134                         }
 135                 }
 136                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 137                 {
 138                         /* Kurze Option */
 139
 140                         for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
 141                         {
 142                                 ok = FALSE;
 143 #ifdef DEBUG
 144                                 if( argv[i][n] == 'd' )
 145                                 {
 146                                         NGIRCd_Debug = TRUE;
 147                                         ok = TRUE;
 148                                 }
 149 #endif
 150                                 if( argv[i][n] == 'f' )
 151                                 {
 152                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 153                                         {
 154                                                 /* Ok, danach kommt ein Leerzeichen */
 155                                                 strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
 156                                                 NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
 157
 158                                                 /* zum uebernaechsten Parameter */
 159                                                 i++; n = strlen( argv[i] );
 160                                                 ok = TRUE;
 161                                         }
 162                                 }
 163                                 if( argv[i][n] == 'n' )
 164                                 {
 165                                         NGIRCd_NoDaemon = TRUE;
 166                                         ok = TRUE;
 167                                 }
 168                                 if( argv[i][n] == 'p' )
 169                                 {
 170                                         NGIRCd_Passive = TRUE;
 171                                         ok = TRUE;
 172                                 }
 173 #ifdef SNIFFER
 174                                 if( argv[i][n] == 's' )
 175                                 {
 176                                         NGIRCd_Sniffer = TRUE;
 177                                         ok = TRUE;
 178                                 }
 179 #endif
 180
 181                                 if( ! ok )
 182                                 {
 183                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE, argv[i][n] );
 184                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE );
 185                                         exit( 1 );
 186                                 }
 187                         }
 188
 189                 }
 190                 if( ! ok )
 191                 {
 192                         printf( "%s: invalid option \"%s\"!\n", PACKAGE, argv[i] );
 193                         printf( "Try \"%s --help\" for more information.\n", PACKAGE );
 194                         exit( 1 );
 195                 }
 196         }
 197
 198         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 199         strcpy( NGIRCd_DebugLevel, "" );
 200 #ifdef DEBUG
 201         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 202 #endif
 203 #ifdef SNIFFER
 204         if( NGIRCd_Sniffer )
 205         {
 206                 NGIRCd_Debug = TRUE;
 207                 strcpy( NGIRCd_DebugLevel, "2" );
 208         }
 209 #endif
 210
 211         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 212         if( configtest )
 213         {
 214                 Show_Version( ); puts( "" );
 215                 exit( Conf_Test( ));
 216         }
 217
 218         while( ! NGIRCd_Quit )
 219         {
 220                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 221                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 222                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 223                  * verhindert werden. */
 224                 if( ! NGIRCd_NoDaemon )
 225                 {
 226                         /* Daemon im Hintergrund erzeugen */
 227                         pid = (INT32)fork( );
 228                         if( pid > 0 )
 229                         {
 230                                 /* "alter" Prozess */
 231                                 exit( 0 );
 232                         }
 233                         if( pid < 0 )
 234                         {
 235                                 /* Fehler */
 236                                 printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE, strerror( errno ));
 237                                 exit( 1 );
 238                         }
 239
 240                         /* Child-Prozess initialisieren */
 241                         (VOID)setsid( );
 242                         chdir( "/" );
 243                 }
 244
 245                 /* Globale Variablen initialisieren */
 246                 NGIRCd_Start = time( NULL );
 247                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 248                 NGIRCd_Restart = FALSE;
 249                 NGIRCd_Quit = FALSE;
 250
 251                 /* Module initialisieren */
 252                 Log_Init( );
 253                 Resolve_Init( );
 254                 Conf_Init( );
 255                 Lists_Init( );
 256                 Channel_Init( );
 257                 Client_Init( );
 258                 Conn_Init( );
 259
 260                 /* Wenn als root ausgefuehrt und eine andere UID
 261                  * konfiguriert ist, jetzt zu dieser wechseln */
 262                 if( getuid( ) == 0 )
 263                 {
 264                         if( Conf_GID != 0 )
 265                         {
 266                                 /* Neue Group-ID setzen */
 267                                 if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change Group-ID to %u: %s", Conf_GID, strerror( errno ));
 268                         }
 269                         if( Conf_UID != 0 )
 270                         {
 271                                 /* Neue User-ID setzen */
 272                                 if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change User-ID to %u: %s", Conf_UID, strerror( errno ));
 273                         }
 274                 }
 275                 Log( LOG_INFO, "Running as user %ld, group %ld.", (INT32)getuid( ), (INT32)getgid( ));
 276
 277                 Log_InitErrorfile( );
 278
 279                 /* Signal-Handler initialisieren */
 280                 Initialize_Signal_Handler( );
 281
 282                 /* Listen-Ports initialisieren */
 283                 Initialize_Listen_Ports( );
 284
 285                 /* Hauptschleife */
 286                 while( TRUE )
 287                 {
 288                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 289                         Conn_Handler( 5 );
 290                 }
 291
 292                 /* Alles abmelden */
 293                 Conn_Exit( );
 294                 Client_Exit( );
 295                 Channel_Exit( );
 296                 Lists_Exit( );
 297                 Log_Exit( );
 298         }
 299
 300         return 0;
 301 } /* main */
 302
 303
 304 GLOBAL CHAR *
 305 NGIRCd_Version( VOID )
 306 {
 307         STATIC CHAR version[126];
 308
 309         sprintf( version, "%s version %s-%s", PACKAGE, VERSION, NGIRCd_VersionAddition( ));
 310         return version;
 311 } /* NGIRCd_Version */
 312
 313
 314 GLOBAL CHAR *
 315 NGIRCd_VersionAddition( VOID )
 316 {
 317         STATIC CHAR txt[64];
 318
 319         strcpy( txt, "" );
 320
 321 #ifdef USE_SYSLOG
 322         if( txt[0] ) strcat( txt, "+" );
 323         strcat( txt, "SYSLOG" );
 324 #endif
 325 #ifdef REGEX
 326         if( txt[0] ) strcat( txt, "+" );
 327         strcat( txt, "REGEX" );
 328 #endif
 329 #ifdef STRICT_RFC
 330         if( txt[0] ) strcat( txt, "+" );
 331         strcat( txt, "RFC" );
 332 #endif
 333 #ifdef DEBUG
 334         if( txt[0] ) strcat( txt, "+" );
 335         strcat( txt, "DEBUG" );
 336 #endif
 337 #ifdef SNIFFER
 338         if( txt[0] ) strcat( txt, "+" );
 339         strcat( txt, "SNIFFER" );
 340 #endif
 341
 342         if( txt[0] ) strcat( txt, "-" );
 343 #ifdef PROTOTYPES
 344         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 345 #else
 346         strcat( txt, TARGET_CPU );
 347         strcat( txt, "/" );
 348         strcat( txt, TARGET_VENDOR );
 349         strcat( txt, "/" );
 350         strcat( txt, TARGET_OS );
 351 #endif
 352
 353         return txt;
 354 } /* NGIRCd_VersionAddition */
 355
 356
 357 LOCAL VOID
 358 Initialize_Signal_Handler( VOID )
 359 {
 360         /* Signal-Handler initialisieren: einige Signale
 361          * werden ignoriert, andere speziell behandelt. */
 362
 363 #ifdef HAVE_SIGACTION
 364         /* sigaction() ist vorhanden */
 365
 366         struct sigaction saction;
 367
 368         /* Signal-Struktur initialisieren */
 369         memset( &saction, 0, sizeof( saction ));
 370         saction.sa_handler = Signal_Handler;
 371 #ifdef SA_RESTART
 372         saction.sa_flags |= SA_RESTART;
 373 #endif
 374 #ifdef SA_NOCLDWAIT
 375         saction.sa_flags |= SA_NOCLDWAIT;
 376 #endif
 377
 378         /* Signal-Handler einhaengen */
 379         sigaction( SIGINT, &saction, NULL );
 380         sigaction( SIGQUIT, &saction, NULL );
 381         sigaction( SIGTERM, &saction, NULL);
 382         sigaction( SIGHUP, &saction, NULL);
 383         sigaction( SIGCHLD, &saction, NULL);
 384
 385         /* einige Signale ignorieren */
 386         saction.sa_handler = SIG_IGN;
 387         sigaction( SIGPIPE, &saction, NULL );
 388 #else
 389         /* kein sigaction() vorhanden */
 390
 391         /* Signal-Handler einhaengen */
 392         signal( SIGINT, Signal_Handler );
 393         signal( SIGQUIT, Signal_Handler );
 394         signal( SIGTERM, Signal_Handler );
 395         signal( SIGHUP, Signal_Handler );
 396         signal( SIGCHLD, Signal_Handler );
 397
 398         /* einige Signale ignorieren */
 399         signal( SIGPIPE, SIG_IGN );
 400 #endif
 401 } /* Initialize_Signal_Handler */
 402
 403
 404 LOCAL VOID
 405 Signal_Handler( INT Signal )
 406 {
 407         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 408          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 409          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 410
 411         switch( Signal )
 412         {
 413                 case SIGTERM:
 414                 case SIGINT:
 415                 case SIGQUIT:
 416                         /* wir soll(t)en uns wohl beenden ... */
 417                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 418                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 419                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 420                         NGIRCd_Quit = TRUE;
 421                         break;
 422                 case SIGHUP:
 423                         /* neu starten */
 424                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 425                         NGIRCd_Restart = TRUE;
 426                         break;
 427                 case SIGCHLD:
 428                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 429                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 430                         break;
 431                 default:
 432                         /* unbekanntes bzw. unbehandeltes Signal */
 433                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 434         }
 435 } /* Signal_Handler */
 436
 437
 438 LOCAL VOID
 439 Initialize_Listen_Ports( VOID )
 440 {
 441         /* Ports, auf denen der Server Verbindungen entgegennehmen
 442          * soll, initialisieren */
 443
 444         UINT created, i;
 445
 446         created = 0;
 447         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 448         {
 449                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 450                 else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
 451         }
 452
 453         if( created < 1 )
 454         {
 455                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 456                 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE );
 457                 exit( 1 );
 458         }
 459 } /* Initialize_Listen_Ports */
 460
 461
 462 LOCAL VOID
 463 Show_Version( VOID )
 464 {
 465         puts( NGIRCd_Version( ));
 466         puts( "Copyright (c)2001,2002 by Alexander Barton (<alex@barton.de>)." );
 467         puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
 468         puts( "This is free software; see the source for copying conditions. There is NO" );
 469         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 470 } /* Show_Version */
 471
 472
 473 LOCAL VOID
 474 Show_Help( VOID )
 475 {
 476 #ifdef DEBUG
 477         puts( "  -d, --debug        log extra debug messages" );
 478 #endif
 479         puts( "  -f, --config <f>   use file <f> as configuration file" );
 480         puts( "  -n, --nodaemon     don't fork and don't detatch from controlling terminal" );
 481         puts( "  -p, --passive      disable automatic connections to other servers" );
 482 #ifdef SNIFFER
 483         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 484 #endif
 485         puts( "      --configtest   read, validate and display configuration; then exit" );
 486         puts( "      --version      output version information and exit" );
 487         puts( "      --help         display this help and exit" );
 488 } /* Show_Help */
 489
 490
 491 /* -eof- */