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 1.43 2002/04/04 13:03:55 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 "channel.h"
  33 #include "client.h"
  34 #include "conf.h"
  35 #include "conn.h"
  36 #include "defines.h"
  37 #include "irc.h"
  38 #include "log.h"
  39 #include "parse.h"
  40
  41 #include "exp.h"
  42 #include "ngircd.h"
  43
  44
  45 LOCAL VOID Initialize_Signal_Handler( VOID );
  46 LOCAL VOID Signal_Handler( INT Signal );
  47
  48 LOCAL VOID Initialize_Listen_Ports( VOID );
  49
  50 LOCAL VOID Show_Version( VOID );
  51 LOCAL VOID Show_Help( VOID );
  52
  53
  54 GLOBAL int main( int argc, const char *argv[] )
  55 {
  56         BOOLEAN ok, configtest = FALSE;
  57         INT32 pid, n;
  58         INT i;
  59
  60         NGIRCd_Restart = FALSE;
  61         NGIRCd_Quit = FALSE;
  62         NGIRCd_NoDaemon = FALSE;
  63         NGIRCd_Passive = FALSE;
  64 #ifdef DEBUG
  65         NGIRCd_Debug = FALSE;
  66 #endif
  67 #ifdef SNIFFER
  68         NGIRCd_Sniffer = FALSE;
  69 #endif
  70         strcpy( NGIRCd_ConfFile, CONFIG_FILE );
  71
  72         /* Kommandozeile parsen */
  73         for( i = 1; i < argc; i++ )
  74         {
  75                 ok = FALSE;
  76                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  77                 {
  78                         /* Lange Option */
  79
  80                         if( strcmp( argv[i], "--config" ) == 0 )
  81                         {
  82                                 if( i + 1 < argc )
  83                                 {
  84                                         /* Ok, danach kommt noch ein Parameter */
  85                                         strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
  86                                         NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
  87
  88                                         /* zum uebernaechsten Parameter */
  89                                         i++; ok = TRUE;
  90                                 }
  91                         }
  92                         if( strcmp( argv[i], "--configtest" ) == 0 )
  93                         {
  94                                 configtest = TRUE;
  95                                 ok = TRUE;
  96                         }
  97 #ifdef DEBUG
  98                         if( strcmp( argv[i], "--debug" ) == 0 )
  99                         {
 100                                 NGIRCd_Debug = TRUE;
 101                                 ok = TRUE;
 102                         }
 103 #endif
 104                         if( strcmp( argv[i], "--help" ) == 0 )
 105                         {
 106                                 Show_Version( );
 107                                 puts( "" ); Show_Help( ); puts( "" );
 108                                 exit( 1 );
 109                         }
 110                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 111                         {
 112                                 NGIRCd_NoDaemon = TRUE;
 113                                 ok = TRUE;
 114                         }
 115                         if( strcmp( argv[i], "--passive" ) == 0 )
 116                         {
 117                                 NGIRCd_Passive = TRUE;
 118                                 ok = TRUE;
 119                         }
 120 #ifdef SNIFFER
 121                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 122                         {
 123                                 NGIRCd_Sniffer = TRUE;
 124                                 ok = TRUE;
 125                         }
 126 #endif
 127                         if( strcmp( argv[i], "--version" ) == 0 )
 128                         {
 129                                 Show_Version( );
 130                                 exit( 1 );
 131                         }
 132                 }
 133                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 134                 {
 135                         /* Kurze Option */
 136
 137                         for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
 138                         {
 139                                 ok = FALSE;
 140 #ifdef DEBUG
 141                                 if( argv[i][n] == 'd' )
 142                                 {
 143                                         NGIRCd_Debug = TRUE;
 144                                         ok = TRUE;
 145                                 }
 146 #endif
 147                                 if( argv[i][n] == 'f' )
 148                                 {
 149                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 150                                         {
 151                                                 /* Ok, danach kommt ein Leerzeichen */
 152                                                 strncpy( NGIRCd_ConfFile, argv[i + 1], FNAME_LEN - 1 );
 153                                                 NGIRCd_ConfFile[FNAME_LEN - 1] = '\0';
 154
 155                                                 /* zum uebernaechsten Parameter */
 156                                                 i++; n = strlen( argv[i] );
 157                                                 ok = TRUE;
 158                                         }
 159                                 }
 160                                 if( argv[i][n] == 'n' )
 161                                 {
 162                                         NGIRCd_NoDaemon = TRUE;
 163                                         ok = TRUE;
 164                                 }
 165                                 if( argv[i][n] == 'p' )
 166                                 {
 167                                         NGIRCd_Passive = TRUE;
 168                                         ok = TRUE;
 169                                 }
 170 #ifdef SNIFFER
 171                                 if( argv[i][n] == 's' )
 172                                 {
 173                                         NGIRCd_Sniffer = TRUE;
 174                                         ok = TRUE;
 175                                 }
 176 #endif
 177
 178                                 if( ! ok )
 179                                 {
 180                                         printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
 181                                         puts( "Try \""PACKAGE" --help\" for more information." );
 182                                         exit( 1 );
 183                                 }
 184                         }
 185
 186                 }
 187                 if( ! ok )
 188                 {
 189                         printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
 190                         puts( "Try \""PACKAGE" --help\" for more information." );
 191                         exit( 1 );
 192                 }
 193         }
 194
 195         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 196         strcpy( NGIRCd_DebugLevel, "" );
 197 #ifdef DEBUG
 198         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 199 #endif
 200 #ifdef SNIFFER
 201         if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
 202 #endif
 203
 204         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 205         if( configtest )
 206         {
 207                 Show_Version( ); puts( "" );
 208                 exit( Conf_Test( ));
 209         }
 210
 211         while( ! NGIRCd_Quit )
 212         {
 213                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 214                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 215                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 216                  * verhindert werden. */
 217                 if( ! NGIRCd_NoDaemon )
 218                 {
 219                         /* Daemon im Hintergrund erzeugen */
 220                         pid = (INT32)fork( );
 221                         if( pid > 0 )
 222                         {
 223                                 /* "alter" Prozess */
 224                                 exit( 0 );
 225                         }
 226                         if( pid < 0 )
 227                         {
 228                                 /* Fehler */
 229                                 printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
 230                                 exit( 1 );
 231                         }
 232
 233                         /* Child-Prozess initialisieren */
 234                         (VOID)setsid( );
 235                         chdir( "/" );
 236                 }
 237
 238                 /* Globale Variablen initialisieren */
 239                 NGIRCd_Start = time( NULL );
 240                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 241                 NGIRCd_Restart = FALSE;
 242                 NGIRCd_Quit = FALSE;
 243
 244                 /* Module initialisieren */
 245                 Log_Init( );
 246                 Conf_Init( );
 247                 Channel_Init( );
 248                 Client_Init( );
 249                 Conn_Init( );
 250
 251                 /* Wenn als root ausgefuehrt und eine andere UID
 252                  * konfiguriert ist, jetzt zu dieser wechseln */
 253                 if( getuid( ) == 0 )
 254                 {
 255                         if( Conf_GID != 0 )
 256                         {
 257                                 /* Neue Group-ID setzen */
 258                                 if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change Group-ID to %u: %s", Conf_GID, strerror( errno ));
 259                         }
 260                         if( Conf_UID != 0 )
 261                         {
 262                                 /* Neue User-ID setzen */
 263                                 if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change User-ID to %u: %s", Conf_UID, strerror( errno ));
 264                         }
 265                 }
 266                 Log( LOG_INFO, "Running as user %ld, group %ld.", (INT32)getuid( ), (INT32)getgid( ));
 267
 268                 Log_InitErrorfile( );
 269
 270                 /* Signal-Handler initialisieren */
 271                 Initialize_Signal_Handler( );
 272
 273                 /* Listen-Ports initialisieren */
 274                 Initialize_Listen_Ports( );
 275
 276                 /* Hauptschleife */
 277                 while( TRUE )
 278                 {
 279                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 280                         Conn_Handler( 5 );
 281                 }
 282
 283                 /* Alles abmelden */
 284                 Conn_Exit( );
 285                 Client_Exit( );
 286                 Channel_Exit( );
 287                 Conf_Exit( );
 288                 Log_Exit( );
 289         }
 290
 291         return 0;
 292 } /* main */
 293
 294
 295 GLOBAL CHAR *NGIRCd_Version( VOID )
 296 {
 297         STATIC CHAR version[126];
 298
 299         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 300         return version;
 301 } /* NGIRCd_Version */
 302
 303
 304 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 305 {
 306         STATIC CHAR txt[64];
 307
 308         strcpy( txt, "" );
 309
 310 #ifdef USE_SYSLOG
 311         if( txt[0] ) strcat( txt, "+" );
 312         strcat( txt, "SYSLOG" );
 313 #endif
 314 #ifdef STRICT_RFC
 315         if( txt[0] ) strcat( txt, "+" );
 316         strcat( txt, "RFC" );
 317 #endif
 318 #ifdef DEBUG
 319         if( txt[0] ) strcat( txt, "+" );
 320         strcat( txt, "DEBUG" );
 321 #endif
 322 #ifdef SNIFFER
 323         if( txt[0] ) strcat( txt, "+" );
 324         strcat( txt, "SNIFFER" );
 325 #endif
 326
 327         if( txt[0] ) strcat( txt, "-" );
 328         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 329
 330         return txt;
 331 } /* NGIRCd_VersionAddition */
 332
 333
 334 LOCAL VOID Initialize_Signal_Handler( VOID )
 335 {
 336         /* Signal-Handler initialisieren: einige Signale
 337          * werden ignoriert, andere speziell behandelt. */
 338
 339 #ifdef HAVE_SIGACTION
 340         /* sigaction() ist vorhanden */
 341
 342         struct sigaction saction;
 343
 344         /* Signal-Struktur initialisieren */
 345         memset( &saction, 0, sizeof( saction ));
 346         saction.sa_handler = Signal_Handler;
 347 #ifdef SA_RESTART
 348         saction.sa_flags |= SA_RESTART;
 349 #endif
 350 #ifdef SA_NOCLDWAIT
 351         saction.sa_flags |= SA_NOCLDWAIT;
 352 #endif
 353
 354         /* Signal-Handler einhaengen */
 355         sigaction( SIGINT, &saction, NULL );
 356         sigaction( SIGQUIT, &saction, NULL );
 357         sigaction( SIGTERM, &saction, NULL);
 358         sigaction( SIGHUP, &saction, NULL);
 359         sigaction( SIGCHLD, &saction, NULL);
 360
 361         /* einige Signale ignorieren */
 362         saction.sa_handler = SIG_IGN;
 363         sigaction( SIGPIPE, &saction, NULL );
 364 #else
 365         /* kein sigaction() vorhanden */
 366
 367         /* Signal-Handler einhaengen */
 368         signal( SIGINT, Signal_Handler );
 369         signal( SIGQUIT, Signal_Handler );
 370         signal( SIGTERM, Signal_Handler );
 371         signal( SIGHUP, Signal_Handler );
 372         signal( SIGCHLD, Signal_Handler );
 373
 374         /* einige Signale ignorieren */
 375         signal( SIGPIPE, SIG_IGN );
 376 #endif
 377 } /* Initialize_Signal_Handler */
 378
 379
 380 LOCAL VOID Signal_Handler( INT Signal )
 381 {
 382         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 383          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 384          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 385
 386         switch( Signal )
 387         {
 388                 case SIGTERM:
 389                 case SIGINT:
 390                 case SIGQUIT:
 391                         /* wir soll(t)en uns wohl beenden ... */
 392                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 393                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 394                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 395                         NGIRCd_Quit = TRUE;
 396                         break;
 397                 case SIGHUP:
 398                         /* neu starten */
 399                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 400                         NGIRCd_Restart = TRUE;
 401                         break;
 402                 case SIGCHLD:
 403                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 404                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 405                         break;
 406                 default:
 407                         /* unbekanntes bzw. unbehandeltes Signal */
 408                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 409         }
 410 } /* Signal_Handler */
 411
 412
 413 LOCAL VOID Initialize_Listen_Ports( VOID )
 414 {
 415         /* Ports, auf denen der Server Verbindungen entgegennehmen
 416          * soll, initialisieren */
 417
 418         UINT created, i;
 419
 420         created = 0;
 421         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 422         {
 423                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 424                 else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
 425         }
 426
 427         if( created < 1 )
 428         {
 429                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 430                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 431                 exit( 1 );
 432         }
 433 } /* Initialize_Listen_Ports */
 434
 435
 436 LOCAL VOID Show_Version( VOID )
 437 {
 438         puts( NGIRCd_Version( ));
 439         puts( "Copyright (c)2001,2002 by Alexander Barton (<alex@barton.de>)." );
 440         puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
 441         puts( "This is free software; see the source for copying conditions. There is NO" );
 442         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 443 } /* Show_Version */
 444
 445
 446 LOCAL VOID Show_Help( VOID )
 447 {
 448 #ifdef DEBUG
 449         puts( "  -d, --debug        log extra debug messages" );
 450 #endif
 451         puts( "  -f, --config <f>   use file <f> as configuration file" );
 452         puts( "  -n, --nodaemon     don't fork and don't detatch from controlling terminal" );
 453         puts( "  -p, --passive      disable automatic connections to other servers" );
 454 #ifdef SNIFFER
 455         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 456 #endif
 457         puts( "      --configtest   read, validate and display configuration; then exit" );
 458         puts( "      --version      output version information and exit" );
 459         puts( "      --help         display this help and exit" );
 460 } /* Show_Help */
 461
 462
 463 /* -eof- */