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 1.41 2002/03/31 13:20:42 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], "--config" ) == 0 )
  80                         {
  81                                 if( i + 1 < argc )
  82                                 {
  83                                         /* Ok, danach kommt noch ein Parameter */
  84                                         strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
  85                                         NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
  86
  87                                         /* zum uebernaechsten Parameter */
  88                                         i++; ok = TRUE;
  89                                 }
  90                         }
  91                         if( strcmp( argv[i], "--configtest" ) == 0 )
  92                         {
  93                                 configtest = TRUE;
  94                                 ok = TRUE;
  95                         }
  96 #ifdef DEBUG
  97                         if( strcmp( argv[i], "--debug" ) == 0 )
  98                         {
  99                                 NGIRCd_Debug = TRUE;
 100                                 ok = TRUE;
 101                         }
 102 #endif
 103                         if( strcmp( argv[i], "--help" ) == 0 )
 104                         {
 105                                 Show_Version( );
 106                                 puts( "" ); Show_Help( ); puts( "" );
 107                                 exit( 1 );
 108                         }
 109                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 110                         {
 111                                 NGIRCd_NoDaemon = TRUE;
 112                                 ok = TRUE;
 113                         }
 114                         if( strcmp( argv[i], "--passive" ) == 0 )
 115                         {
 116                                 NGIRCd_Passive = TRUE;
 117                                 ok = TRUE;
 118                         }
 119 #ifdef SNIFFER
 120                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 121                         {
 122                                 NGIRCd_Sniffer = TRUE;
 123                                 ok = TRUE;
 124                         }
 125 #endif
 126                         if( strcmp( argv[i], "--version" ) == 0 )
 127                         {
 128                                 Show_Version( );
 129                                 exit( 1 );
 130                         }
 131                 }
 132                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 133                 {
 134                         /* Kurze Option */
 135
 136                         for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
 137                         {
 138                                 ok = FALSE;
 139 #ifdef DEBUG
 140                                 if( argv[i][n] == 'd' )
 141                                 {
 142                                         NGIRCd_Debug = TRUE;
 143                                         ok = TRUE;
 144                                 }
 145 #endif
 146                                 if( argv[i][n] == 'f' )
 147                                 {
 148                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 149                                         {
 150                                                 /* Ok, danach kommt ein Leerzeichen */
 151                                                 strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
 152                                                 NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
 153
 154                                                 /* zum uebernaechsten Parameter */
 155                                                 i++; n = strlen( argv[i] );
 156                                                 ok = TRUE;
 157                                         }
 158                                 }
 159                                 if( argv[i][n] == 'n' )
 160                                 {
 161                                         NGIRCd_NoDaemon = TRUE;
 162                                         ok = TRUE;
 163                                 }
 164                                 if( argv[i][n] == 'p' )
 165                                 {
 166                                         NGIRCd_Passive = TRUE;
 167                                         ok = TRUE;
 168                                 }
 169 #ifdef SNIFFER
 170                                 if( argv[i][n] == 's' )
 171                                 {
 172                                         NGIRCd_Sniffer = TRUE;
 173                                         ok = TRUE;
 174                                 }
 175 #endif
 176
 177                                 if( ! ok )
 178                                 {
 179                                         printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
 180                                         puts( "Try \""PACKAGE" --help\" for more information." );
 181                                         exit( 1 );
 182                                 }
 183                         }
 184
 185                 }
 186                 if( ! ok )
 187                 {
 188                         printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
 189                         puts( "Try \""PACKAGE" --help\" for more information." );
 190                         exit( 1 );
 191                 }
 192         }
 193
 194         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 195         strcpy( NGIRCd_DebugLevel, "" );
 196 #ifdef DEBUG
 197         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 198 #endif
 199 #ifdef SNIFFER
 200         if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
 201 #endif
 202
 203         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 204         if( configtest )
 205         {
 206                 Show_Version( ); puts( "" );
 207                 exit( Conf_Test( ));
 208         }
 209
 210         while( ! NGIRCd_Quit )
 211         {
 212                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 213                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 214                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 215                  * verhindert werden. */
 216                 if( ! NGIRCd_NoDaemon )
 217                 {
 218                         /* Daemon im Hintergrund erzeugen */
 219                         pid = (INT32)fork( );
 220                         if( pid > 0 )
 221                         {
 222                                 /* "alter" Prozess */
 223                                 exit( 0 );
 224                         }
 225                         if( pid < 0 )
 226                         {
 227                                 /* Fehler */
 228                                 printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
 229                                 exit( 1 );
 230                         }
 231
 232                         /* Child-Prozess initialisieren */
 233                         (VOID)setsid( );
 234                         chdir( "/" );
 235                 }
 236
 237                 /* Globale Variablen initialisieren */
 238                 NGIRCd_Start = time( NULL );
 239                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 240                 NGIRCd_Restart = FALSE;
 241                 NGIRCd_Quit = FALSE;
 242
 243                 /* Module initialisieren */
 244                 Log_Init( );
 245                 Conf_Init( );
 246                 Channel_Init( );
 247                 Client_Init( );
 248                 Conn_Init( );
 249
 250                 /* Wenn als root ausgefuehrt und eine andere UID
 251                  * konfiguriert ist, jetzt zu dieser wechseln */
 252                 if( getuid( ) == 0 )
 253                 {
 254                         if( Conf_GID != 0 )
 255                         {
 256                                 /* Neue Group-ID setzen */
 257                                 if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change Group-ID to %u: %s", Conf_GID, strerror( errno ));
 258                         }
 259                         if( Conf_UID != 0 )
 260                         {
 261                                 /* Neue User-ID setzen */
 262                                 if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change User-ID to %u: %s", Conf_UID, strerror( errno ));
 263                         }
 264                 }
 265                 Log( LOG_INFO, "Running as user %ld, group %ld.", (INT32)getuid( ), (INT32)getgid( ));
 266
 267                 Log_InitErrorfile( );
 268
 269                 /* Signal-Handler initialisieren */
 270                 Initialize_Signal_Handler( );
 271
 272                 /* Listen-Ports initialisieren */
 273                 Initialize_Listen_Ports( );
 274
 275                 /* Hauptschleife */
 276                 while( TRUE )
 277                 {
 278                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 279                         Conn_Handler( 5 );
 280                 }
 281
 282                 /* Alles abmelden */
 283                 Conn_Exit( );
 284                 Client_Exit( );
 285                 Channel_Exit( );
 286                 Conf_Exit( );
 287                 Log_Exit( );
 288         }
 289
 290         return 0;
 291 } /* main */
 292
 293
 294 GLOBAL CHAR *NGIRCd_Version( VOID )
 295 {
 296         STATIC CHAR version[126];
 297
 298         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 299         return version;
 300 } /* NGIRCd_Version */
 301
 302
 303 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 304 {
 305         STATIC CHAR txt[64];
 306
 307         strcpy( txt, "" );
 308
 309 #ifdef USE_SYSLOG
 310         if( txt[0] ) strcat( txt, "+" );
 311         strcat( txt, "SYSLOG" );
 312 #endif
 313 #ifdef STRICT_RFC
 314         if( txt[0] ) strcat( txt, "+" );
 315         strcat( txt, "RFC" );
 316 #endif
 317 #ifdef DEBUG
 318         if( txt[0] ) strcat( txt, "+" );
 319         strcat( txt, "DEBUG" );
 320 #endif
 321 #ifdef SNIFFER
 322         if( txt[0] ) strcat( txt, "+" );
 323         strcat( txt, "SNIFFER" );
 324 #endif
 325
 326         if( txt[0] ) strcat( txt, "-" );
 327         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 328
 329         return txt;
 330 } /* NGIRCd_VersionAddition */
 331
 332
 333 LOCAL VOID Initialize_Signal_Handler( VOID )
 334 {
 335         /* Signal-Handler initialisieren: einige Signale
 336          * werden ignoriert, andere speziell behandelt. */
 337
 338 #ifdef HAVE_SIGACTION
 339         /* sigaction() ist vorhanden */
 340
 341         struct sigaction saction;
 342
 343         /* Signal-Struktur initialisieren */
 344         memset( &saction, 0, sizeof( saction ));
 345         saction.sa_handler = Signal_Handler;
 346 #ifdef SA_RESTART
 347         saction.sa_flags |= SA_RESTART;
 348 #endif
 349 #ifdef SA_NOCLDWAIT
 350         saction.sa_flags |= SA_NOCLDWAIT;
 351 #endif
 352
 353         /* Signal-Handler einhaengen */
 354         sigaction( SIGINT, &saction, NULL );
 355         sigaction( SIGQUIT, &saction, NULL );
 356         sigaction( SIGTERM, &saction, NULL);
 357         sigaction( SIGHUP, &saction, NULL);
 358         sigaction( SIGCHLD, &saction, NULL);
 359
 360         /* einige Signale ignorieren */
 361         saction.sa_handler = SIG_IGN;
 362         sigaction( SIGPIPE, &saction, NULL );
 363 #else
 364         /* kein sigaction() vorhanden */
 365
 366         /* Signal-Handler einhaengen */
 367         signal( SIGINT, Signal_Handler );
 368         signal( SIGQUIT, Signal_Handler );
 369         signal( SIGTERM, Signal_Handler );
 370         signal( SIGHUP, Signal_Handler );
 371         signal( SIGCHLD, Signal_Handler );
 372
 373         /* einige Signale ignorieren */
 374         signal( SIGPIPE, SIG_IGN );
 375 #endif
 376 } /* Initialize_Signal_Handler */
 377
 378
 379 LOCAL VOID Signal_Handler( INT Signal )
 380 {
 381         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 382          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 383          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 384
 385         switch( Signal )
 386         {
 387                 case SIGTERM:
 388                 case SIGINT:
 389                 case SIGQUIT:
 390                         /* wir soll(t)en uns wohl beenden ... */
 391                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 392                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 393                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 394                         NGIRCd_Quit = TRUE;
 395                         break;
 396                 case SIGHUP:
 397                         /* neu starten */
 398                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 399                         NGIRCd_Restart = TRUE;
 400                         break;
 401                 case SIGCHLD:
 402                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 403                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 404                         break;
 405                 default:
 406                         /* unbekanntes bzw. unbehandeltes Signal */
 407                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 408         }
 409 } /* Signal_Handler */
 410
 411
 412 LOCAL VOID Initialize_Listen_Ports( VOID )
 413 {
 414         /* Ports, auf denen der Server Verbindungen entgegennehmen
 415          * soll, initialisieren */
 416
 417         UINT created, i;
 418
 419         created = 0;
 420         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 421         {
 422                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 423                 else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
 424         }
 425
 426         if( created < 1 )
 427         {
 428                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 429                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 430                 exit( 1 );
 431         }
 432 } /* Initialize_Listen_Ports */
 433
 434
 435 LOCAL VOID Show_Version( VOID )
 436 {
 437         puts( NGIRCd_Version( ));
 438         puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
 439         puts( "This is free software; see the source for copying conditions. There is NO" );
 440         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 441 } /* Show_Version */
 442
 443
 444 LOCAL VOID Show_Help( VOID )
 445 {
 446 #ifdef DEBUG
 447         puts( "  -d, --debug        log extra debug messages" );
 448 #endif
 449         puts( "  -f, --config <f>   use file <f> as configuration file" );
 450         puts( "  -n, --nodaemon     don't fork and don't detatch from controlling terminal" );
 451         puts( "  -p, --passive      disable automatic connections to other servers" );
 452 #ifdef SNIFFER
 453         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 454 #endif
 455         puts( "      --configtest   read, validate and display configuration; then exit" );
 456         puts( "      --version      output version information and exit" );
 457         puts( "      --help         display this help and exit" );
 458 } /* Show_Help */
 459
 460
 461 /* -eof- */