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 1.39 2002/03/29 22:56:40 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+i] ) && ( 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( setgid( 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                 /* Signal-Handler initialisieren */
 268                 Initialize_Signal_Handler( );
 269
 270                 /* Listen-Ports initialisieren */
 271                 Initialize_Listen_Ports( );
 272
 273                 /* Hauptschleife */
 274                 while( TRUE )
 275                 {
 276                         if( NGIRCd_Quit || NGIRCd_Restart ) break;
 277                         Conn_Handler( 5 );
 278                 }
 279
 280                 /* Alles abmelden */
 281                 Conn_Exit( );
 282                 Client_Exit( );
 283                 Channel_Exit( );
 284                 Conf_Exit( );
 285                 Log_Exit( );
 286         }
 287
 288         return 0;
 289 } /* main */
 290
 291
 292 GLOBAL CHAR *NGIRCd_Version( VOID )
 293 {
 294         STATIC CHAR version[126];
 295
 296         sprintf( version, PACKAGE" version "VERSION"-%s", NGIRCd_VersionAddition( ));
 297         return version;
 298 } /* NGIRCd_Version */
 299
 300
 301 GLOBAL CHAR *NGIRCd_VersionAddition( VOID )
 302 {
 303         STATIC CHAR txt[64];
 304
 305         strcpy( txt, "" );
 306
 307 #ifdef USE_SYSLOG
 308         if( txt[0] ) strcat( txt, "+" );
 309         strcat( txt, "SYSLOG" );
 310 #endif
 311 #ifdef STRICT_RFC
 312         if( txt[0] ) strcat( txt, "+" );
 313         strcat( txt, "RFC" );
 314 #endif
 315 #ifdef DEBUG
 316         if( txt[0] ) strcat( txt, "+" );
 317         strcat( txt, "DEBUG" );
 318 #endif
 319 #ifdef SNIFFER
 320         if( txt[0] ) strcat( txt, "+" );
 321         strcat( txt, "SNIFFER" );
 322 #endif
 323
 324         if( txt[0] ) strcat( txt, "-" );
 325         strcat( txt, TARGET_CPU"/"TARGET_VENDOR"/"TARGET_OS );
 326
 327         return txt;
 328 } /* NGIRCd_VersionAddition */
 329
 330
 331 LOCAL VOID Initialize_Signal_Handler( VOID )
 332 {
 333         /* Signal-Handler initialisieren: einige Signale
 334          * werden ignoriert, andere speziell behandelt. */
 335
 336 #ifdef HAVE_SIGACTION
 337         /* sigaction() ist vorhanden */
 338
 339         struct sigaction saction;
 340
 341         /* Signal-Struktur initialisieren */
 342         memset( &saction, 0, sizeof( saction ));
 343         saction.sa_handler = Signal_Handler;
 344 #ifdef SA_RESTART
 345         saction.sa_flags |= SA_RESTART;
 346 #endif
 347 #ifdef SA_NOCLDWAIT
 348         saction.sa_flags |= SA_NOCLDWAIT;
 349 #endif
 350
 351         /* Signal-Handler einhaengen */
 352         sigaction( SIGINT, &saction, NULL );
 353         sigaction( SIGQUIT, &saction, NULL );
 354         sigaction( SIGTERM, &saction, NULL);
 355         sigaction( SIGHUP, &saction, NULL);
 356         sigaction( SIGCHLD, &saction, NULL);
 357
 358         /* einige Signale ignorieren */
 359         saction.sa_handler = SIG_IGN;
 360         sigaction( SIGPIPE, &saction, NULL );
 361 #else
 362         /* kein sigaction() vorhanden */
 363
 364         /* Signal-Handler einhaengen */
 365         signal( SIGINT, Signal_Handler );
 366         signal( SIGQUIT, Signal_Handler );
 367         signal( SIGTERM, Signal_Handler );
 368         signal( SIGHUP, Signal_Handler );
 369         signal( SIGCHLD, Signal_Handler );
 370
 371         /* einige Signale ignorieren */
 372         signal( SIGPIPE, SIG_IGN );
 373 #endif
 374 } /* Initialize_Signal_Handler */
 375
 376
 377 LOCAL VOID Signal_Handler( INT Signal )
 378 {
 379         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 380          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 381          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 382
 383         switch( Signal )
 384         {
 385                 case SIGTERM:
 386                 case SIGINT:
 387                 case SIGQUIT:
 388                         /* wir soll(t)en uns wohl beenden ... */
 389                         if( Signal == SIGTERM ) Log( LOG_WARNING, "Got TERM signal, terminating now ..." );
 390                         else if( Signal == SIGINT ) Log( LOG_WARNING, "Got INT signal, terminating now ..." );
 391                         else if( Signal == SIGQUIT ) Log( LOG_WARNING, "Got QUIT signal, terminating now ..." );
 392                         NGIRCd_Quit = TRUE;
 393                         break;
 394                 case SIGHUP:
 395                         /* neu starten */
 396                         Log( LOG_WARNING, "Got HUP signal, restarting now ..." );
 397                         NGIRCd_Restart = TRUE;
 398                         break;
 399                 case SIGCHLD:
 400                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 401                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 402                         break;
 403                 default:
 404                         /* unbekanntes bzw. unbehandeltes Signal */
 405                         Log( LOG_NOTICE, "Got signal %d! Ignored.", Signal );
 406         }
 407 } /* Signal_Handler */
 408
 409
 410 LOCAL VOID Initialize_Listen_Ports( VOID )
 411 {
 412         /* Ports, auf denen der Server Verbindungen entgegennehmen
 413          * soll, initialisieren */
 414
 415         UINT created, i;
 416
 417         created = 0;
 418         for( i = 0; i < Conf_ListenPorts_Count; i++ )
 419         {
 420                 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
 421                 else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
 422         }
 423
 424         if( created < 1 )
 425         {
 426                 Log( LOG_ALERT, "Server isn't listening on a single port!" );
 427                 Log( LOG_ALERT, PACKAGE" exiting due to fatal errors!" );
 428                 exit( 1 );
 429         }
 430 } /* Initialize_Listen_Ports */
 431
 432
 433 LOCAL VOID Show_Version( VOID )
 434 {
 435         puts( NGIRCd_Version( ));
 436         puts( "Copyright (c)2001,2002 by Alexander Barton (alex@barton.de).\n" );
 437         puts( "This is free software; see the source for copying conditions. There is NO" );
 438         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 439 } /* Show_Version */
 440
 441
 442 LOCAL VOID Show_Help( VOID )
 443 {
 444 #ifdef DEBUG
 445         puts( "  -d, --debug        log extra debug messages" );
 446 #endif
 447         puts( "  -f, --config <f>   use file <f> as configuration file" );
 448         puts( "  -n, --nodaemon     don't fork and don't detatch from controlling terminal" );
 449         puts( "  -p, --passive      disable automatic connections to other servers" );
 450 #ifdef SNIFFER
 451         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 452 #endif
 453         puts( "      --configtest   read, validate and display configuration; then exit" );
 454         puts( "      --version      output version information and exit" );
 455         puts( "      --help         display this help and exit" );
 456 } /* Show_Help */
 457
 458
 459 /* -eof- */