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 1.35 2002/03/25 19:11:01 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         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
  70         /* Kommandozeile parsen */
  71         for( i = 1; i < argc; i++ )
  72         {
  73                 ok = FALSE;
  74                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  75                 {
  76                         /* Lange Option */
  77
  78 #ifdef DEBUG
  79                         if( strcmp( argv[i], "--debug" ) == 0 )
  80                         {
  81                                 NGIRCd_Debug = TRUE;
  82                                 ok = TRUE;
  83                         }
  84 #endif
  85                         if( strcmp( argv[i], "--help" ) == 0 )
  86                         {
  87                                 Show_Version( ); puts( "" );
  88                                 Show_Help( ); puts( "" );
  89                                 exit( 1 );
  90                         }
  91                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
  92                         {
  93                                 NGIRCd_NoDaemon = TRUE;
  94                                 ok = TRUE;
  95                         }
  96                         if( strcmp( argv[i], "--passive" ) == 0 )
  97                         {
  98                                 NGIRCd_Passive = TRUE;
  99                                 ok = TRUE;
 100                         }
 101 #ifdef SNIFFER
 102                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 103                         {
 104                                 NGIRCd_Sniffer = TRUE;
 105                                 ok = TRUE;
 106                         }
 107 #endif
 108                         if( strcmp( argv[i], "--version" ) == 0 )
 109                         {
 110                                 Show_Version( );
 111                                 exit( 1 );
 112                         }
 113                 }
 114                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 115                 {
 116                         /* Kurze Option */
 117
 118                         for( n = 1; n < (INT32)strlen( argv[i] ); n++ )
 119                         {
 120                                 ok = FALSE;
 121 #ifdef DEBUG
 122                                 if( argv[i][n] == 'd' )
 123                                 {
 124                                         NGIRCd_Debug = TRUE;
 125                                         ok = TRUE;
 126                                 }
 127 #endif
 128                                 if( argv[i][n] == 'n' )
 129                                 {
 130                                         NGIRCd_NoDaemon = TRUE;
 131                                         ok = TRUE;
 132                                 }
 133                                 if( argv[i][n] == 'p' )
 134                                 {
 135                                         NGIRCd_Passive = TRUE;
 136                                         ok = TRUE;
 137                                 }
 138 #ifdef SNIFFER
 139                                 if( argv[i][n] == 's' )
 140                                 {
 141                                         NGIRCd_Sniffer = TRUE;
 142                                         ok = TRUE;
 143                                 }
 144 #endif
 145
 146                                 if( ! ok )
 147                                 {
 148                                         printf( PACKAGE": invalid option \"-%c\"!\n", argv[i][n] );
 149                                         puts( "Try \""PACKAGE" --help\" for more information." );
 150                                         exit( 1 );
 151                                 }
 152                         }
 153
 154                 }
 155                 if( ! ok )
 156                 {
 157                         printf( PACKAGE": invalid option \"%s\"!\n", argv[i] );
 158                         puts( "Try \""PACKAGE" --help\" for more information." );
 159                         exit( 1 );
 160                 }
 161         }
 162
 163         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 164         strcpy( NGIRCd_DebugLevel, "" );
 165 #ifdef DEBUG
 166         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 167 #endif
 168 #ifdef SNIFFER
 169         if( NGIRCd_Sniffer ) strcpy( NGIRCd_DebugLevel, "2" );
 170 #endif
 171
 172         while( ! NGIRCd_Quit )
 173         {
 174                 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
 175                  * nicht mehr mit dem Terminal verbunden ist. Mit der
 176                  * Option "--nodaemon" kann dies (z.B. zum Debuggen)
 177                  * verhindert werden. */
 178                 if( ! NGIRCd_NoDaemon )
 179                 {
 180                         /* Daemon im Hintergrund erzeugen */
 181                         pid = (INT32)fork( );
 182                         if( pid > 0 )
 183                         {
 184                                 /* "alter" Prozess */
 185                                 exit( 0 );
 186                         }
 187                         if( pid < 0 )
 188                         {
 189                                 /* Fehler */
 190                                 printf( PACKAGE": Can't fork: %s!\nFatal error, exiting now ...", strerror( errno ));
 191                                 exit( 1 );
 192                         }
 193
 194                         /* Child-Prozess initialisieren */
 195                         (VOID)setsid( );
 196                         chdir( "/" );
 197                 }
 198
 199                 /* Globale Variablen initialisieren */
 200                 NGIRCd_Start = time( NULL );
 201                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 202                 NGIRCd_Restart = FALSE;
 203                 NGIRCd_Quit = FALSE;
 204
 205                 /* Module initialisieren */
 206                 Log_Init( );
 207                 Conf_Init( );
 208                 Channel_Init( );
 209                 Client_Init( );
 210                 Conn_Init( );
 211
 212                 /* Signal-Handler initialisieren */
 213                 Initialize_Signal_Handler( );
 214
 215                 /* Listen-Ports initialisieren */
 216                 Initialize_Listen_Ports( );
 217
 218                 /* Hauptschleife */
 219                 while( TRUE )
 220                 {
 221                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 222                         Conn_Handler( 5 );
 223                 }
 224
 225                 /* Alles abmelden */
 226                 Conn_Exit( );
 227                 Client_Exit( );
 228                 Channel_Exit( );
 229                 Conf_Exit( );
 230                 Log_Exit( );
 231         }
 232
 233 #ifndef DEBUG
 234         /* aufraeumen */
 235         if( unlink( ERROR_FILE ) != 0 ) Log( LOG_ERR, "Can't delete \""ERROR_FILE"\": %s", strerror( errno ));
 236 #endif
 237
 238         return 0;
 239 } /* main */
 240
 241
 242 GLOBAL CHAR *NGIRCd_Version( VOID )
 243 {
 244         STATIC CHAR version[126];
 245
 246         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 247         return version;
 248 } /* NGIRCd_Version */
 249
 250
 251 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 252 {
 253         STATIC CHAR txt[64];
 254
 255         strcpy( txt, "" );
 256
 257 #ifdef USE_SYSLOG
 258         if( txt[0] ) strcat( txt, "+" );
 259         strcat( txt, "SYSLOG" );
 260 #endif
 261 #ifdef STRICT_RFC
 262         if( txt[0] ) strcat( txt, "+" );
 263         strcat( txt, "RFC" );
 264 #endif
 265 #ifdef DEBUG
 266         if( txt[0] ) strcat( txt, "+" );
 267         strcat( txt, "DEBUG" );
 268 #endif
 269 #ifdef SNIFFER
 270         if( txt[0] ) strcat( txt, "+" );
 271         strcat( txt, "SNIFFER" );
 272 #endif
 273
 274         if( txt[0] ) strcat( txt, "-" );
 275         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 276
 277         return txt;
 278 } /* NGIRCd_VersionAddition */
 279
 280
 281 LOCAL VOID Initialize_Signal_Handler( VOID )
 282 {
 283         /* Signal-Handler initialisieren: einige Signale
 284          * werden ignoriert, andere speziell behandelt. */
 285
 286 #ifdef HAVE_SIGACTION
 287         /* sigaction() ist vorhanden */
 288
 289         struct sigaction saction;
 290
 291         /* Signal-Struktur initialisieren */
 292         memset( &saction, 0, sizeof( saction ));
 293         saction.sa_handler = Signal_Handler;
 294 #ifdef SA_RESTART
 295         saction.sa_flags |= SA_RESTART;
 296 #endif
 297 #ifdef SA_NOCLDWAIT
 298         saction.sa_flags |= SA_NOCLDWAIT;
 299 #endif
 300
 301         /* Signal-Handler einhaengen */
 302         sigaction( SIGINT, &saction, NULL );
 303         sigaction( SIGQUIT, &saction, NULL );
 304         sigaction( SIGTERM, &saction, NULL);
 305         sigaction( SIGHUP, &saction, NULL);
 306         sigaction( SIGCHLD, &saction, NULL);
 307
 308         /* einige Signale ignorieren */
 309         saction.sa_handler = SIG_IGN;
 310         sigaction( SIGPIPE, &saction, NULL );
 311 #else
 312         /* kein sigaction() vorhanden */
 313
 314         /* Signal-Handler einhaengen */
 315         signal( SIGINT, Signal_Handler );
 316         signal( SIGQUIT, Signal_Handler );
 317         signal( SIGTERM, Signal_Handler );
 318         signal( SIGHUP, Signal_Handler );
 319         signal( SIGCHLD, Signal_Handler );
 320
 321         /* einige Signale ignorieren */
 322         signal( SIGPIPE, SIG_IGN );
 323 #endif
 324 } /* Initialize_Signal_Handler */
 325
 326
 327 LOCAL VOID Signal_Handler( INT Signal )
 328 {
 329         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 330          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 331          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 332
 333         switch( Signal )
 334         {
 335                 case SIGTERM:
 336                 case SIGINT:
 337                 case SIGQUIT:
 338                         /* wir soll(t)en uns wohl beenden ... */
 339                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 340                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 341                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 342                         NGIRCd_Quit = TRUE;
 343                         break;
 344                 case SIGHUP:
 345                         /* neu starten */
 346                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 347                         NGIRCd_Restart = TRUE;
 348                         break;
 349                 case SIGCHLD:
 350                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 351                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 352                         break;
 353                 default:
 354                         /* unbekanntes bzw. unbehandeltes Signal */
 355                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 356         }
 357 } /* Signal_Handler */
 358
 359
 360 LOCAL VOID Initialize_Listen_Ports( VOID )
 361 {
 362         /* Ports, auf denen der Server Verbindungen entgegennehmen
 363          * soll, initialisieren */
 364
 365         INT created, i;
 366
 367         created = 0;
 368         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 369         {
 370                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 371                 else Log( LOG_ERR, "Can't listen on port %d!", Conf_ListenPorts[i] );
 372         }
 373
 374         if( created < 1 )
 375         {
 376                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 377                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 378                 exit( 1 );
 379         }
 380 } /* Initialize_Listen_Ports */
 381
 382
 383 LOCAL VOID Show_Version( VOID )
 384 {
 385         puts( NGIRCd_Version( ));
 386         puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
 387         puts( "This is free software; see the source for copying conditions. There is NO" );
 388         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 389 } /* Show_Version */
 390
 391
 392 LOCAL VOID Show_Help( VOID )
 393 {
 394         puts( "Compile-time defaults:\n" );
 395         puts( "  - configuration: "CONFIG_FILE );
 396         puts( "  - MOTD file: "MOTD_FILE );
 397         puts( "  - server error log: "ERROR_FILE"\n" );
 398         puts( "Run-time options:\n" );
 399 #ifdef DEBUG
 400         puts( "  -d, --debug       log extra debug messages" );
 401 #endif
 402         puts( "  -n, --nodaemon    don't fork and don't detatch from controlling terminal" );
 403         puts( "  -p, --passive     disable automatic connections to other servers" );
 404 #ifdef SNIFFER
 405         puts( "  -s, --sniffer     enable network sniffer and display all IRC traffic" );
 406 #endif
 407         puts( "      --version     output version information and exit" );
 408         puts( "      --help        display this help and exit" );
 409 } /* Show_Help */
 410
 411
 412 /* -eof- */