src/ngircd/ngircd.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2005 by Alexander Barton (alex@barton.de)
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12
  13 #include "portab.h"
  14
  15 static char UNUSED id[] = "$Id: ngircd.c,v 1.96 2005/06/01 21:52:18 alex Exp $";
  16
  17 /**
  18  * @file
  19  * The main program, including the C function main() which is called
  20  * by the loader of the operating system.
  21  */
  22
  23 #include "imp.h"
  24 #include <assert.h>
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <signal.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <time.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <sys/wait.h>
  35 #include <fcntl.h>
  36 #include <pwd.h>
  37 #include <grp.h>
  38
  39 #include "defines.h"
  40 #include "resolve.h"
  41 #include "conn.h"
  42 #include "client.h"
  43 #include "channel.h"
  44 #include "conf.h"
  45 #include "cvs-version.h"
  46 #include "lists.h"
  47 #include "log.h"
  48 #include "parse.h"
  49 #include "irc.h"
  50
  51 #ifdef RENDEZVOUS
  52 #include "rendezvous.h"
  53 #endif
  54
  55 #include "exp.h"
  56 #include "ngircd.h"
  57
  58
  59 LOCAL void Initialize_Signal_Handler PARAMS(( void ));
  60 LOCAL void Signal_Handler PARAMS(( int Signal ));
  61
  62 LOCAL void Show_Version PARAMS(( void ));
  63 LOCAL void Show_Help PARAMS(( void ));
  64
  65 LOCAL void Pidfile_Create PARAMS(( long ));
  66 LOCAL void Pidfile_Delete PARAMS(( void ));
  67
  68 LOCAL void Fill_Version PARAMS(( void ));
  69
  70 LOCAL void Setup_FDStreams PARAMS(( void ));
  71
  72
  73 /**
  74  * The main() function of ngIRCd.
  75  * Here all starts: this function is called by the operating system loader,
  76  * it is the first portion of code executed of ngIRCd.
  77  * @param argc The number of arguments passed to ngIRCd on the command line.
  78  * @param argv An array containing all the arguments passed to ngIRCd.
  79  * @return Global exit code of ngIRCd, zero on success.
  80  */
  81 GLOBAL int
  82 main( int argc, const char *argv[] )
  83 {
  84         struct passwd *pwd;
  85         struct group *grp;
  86         bool ok, configtest = false;
  87         long pid;
  88         int i;
  89         size_t n;
  90
  91         umask( 0077 );
  92
  93         NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = false;
  94         NGIRCd_NoDaemon = NGIRCd_Passive = false;
  95 #ifdef DEBUG
  96         NGIRCd_Debug = false;
  97 #endif
  98 #ifdef SNIFFER
  99         NGIRCd_Sniffer = false;
 100 #endif
 101         strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
 102         strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
 103
 104         Fill_Version( );
 105
 106         /* Kommandozeile parsen */
 107         for( i = 1; i < argc; i++ )
 108         {
 109                 ok = false;
 110                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
 111                 {
 112                         /* Lange Option */
 113
 114                         if( strcmp( argv[i], "--config" ) == 0 )
 115                         {
 116                                 if( i + 1 < argc )
 117                                 {
 118                                         /* Ok, there's an parameter left */
 119                                         strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 120
 121                                         /* next parameter */
 122                                         i++; ok = true;
 123                                 }
 124                         }
 125                         if( strcmp( argv[i], "--configtest" ) == 0 )
 126                         {
 127                                 configtest = true;
 128                                 ok = true;
 129                         }
 130 #ifdef DEBUG
 131                         if( strcmp( argv[i], "--debug" ) == 0 )
 132                         {
 133                                 NGIRCd_Debug = true;
 134                                 ok = true;
 135                         }
 136 #endif
 137                         if( strcmp( argv[i], "--help" ) == 0 )
 138                         {
 139                                 Show_Version( );
 140                                 puts( "" ); Show_Help( ); puts( "" );
 141                                 exit( 1 );
 142                         }
 143                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 144                         {
 145                                 NGIRCd_NoDaemon = true;
 146                                 ok = true;
 147                         }
 148                         if( strcmp( argv[i], "--passive" ) == 0 )
 149                         {
 150                                 NGIRCd_Passive = true;
 151                                 ok = true;
 152                         }
 153 #ifdef SNIFFER
 154                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 155                         {
 156                                 NGIRCd_Sniffer = true;
 157                                 ok = true;
 158                         }
 159 #endif
 160                         if( strcmp( argv[i], "--version" ) == 0 )
 161                         {
 162                                 Show_Version( );
 163                                 exit( 1 );
 164                         }
 165                 }
 166                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 167                 {
 168                         /* Kurze Option */
 169                         for( n = 1; n < strlen( argv[i] ); n++ )
 170                         {
 171                                 ok = false;
 172 #ifdef DEBUG
 173                                 if( argv[i][n] == 'd' )
 174                                 {
 175                                         NGIRCd_Debug = true;
 176                                         ok = true;
 177                                 }
 178 #endif
 179                                 if( argv[i][n] == 'f' )
 180                                 {
 181                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 182                                         {
 183                                                 /* Ok, next character is a blank */
 184                                                 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 185
 186                                                 /* go to the following parameter */
 187                                                 i++;
 188                                                 n = strlen( argv[i] );
 189                                                 ok = true;
 190                                         }
 191                                 }
 192                                 if( argv[i][n] == 'n' )
 193                                 {
 194                                         NGIRCd_NoDaemon = true;
 195                                         ok = true;
 196                                 }
 197                                 if( argv[i][n] == 'p' )
 198                                 {
 199                                         NGIRCd_Passive = true;
 200                                         ok = true;
 201                                 }
 202 #ifdef SNIFFER
 203                                 if( argv[i][n] == 's' )
 204                                 {
 205                                         NGIRCd_Sniffer = true;
 206                                         ok = true;
 207                                 }
 208 #endif
 209                                 if( argv[i][n] == 't' )
 210                                 {
 211                                         configtest = true;
 212                                         ok = true;
 213                                 }
 214
 215                                 if( ! ok )
 216                                 {
 217                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
 218                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 219                                         exit( 1 );
 220                                 }
 221                         }
 222
 223                 }
 224                 if( ! ok )
 225                 {
 226                         printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
 227                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 228                         exit( 1 );
 229                 }
 230         }
 231
 232         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 233         NGIRCd_DebugLevel[0] = '\0';
 234 #ifdef DEBUG
 235         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 236 #endif
 237 #ifdef SNIFFER
 238         if( NGIRCd_Sniffer )
 239         {
 240                 NGIRCd_Debug = true;
 241                 strcpy( NGIRCd_DebugLevel, "2" );
 242         }
 243 #endif
 244
 245         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 246         if( configtest )
 247         {
 248                 Show_Version( ); puts( "" );
 249                 exit( Conf_Test( ));
 250         }
 251
 252         while( ! NGIRCd_SignalQuit )
 253         {
 254                 /* Initialize global variables */
 255                 NGIRCd_Start = time( NULL );
 256                 (void)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 257
 258                 NGIRCd_SignalRehash = false;
 259                 NGIRCd_SignalRestart = false;
 260                 NGIRCd_SignalQuit = false;
 261
 262                 /* Initialize modules, part I */
 263                 Log_Init( );
 264                 Conf_Init( );
 265
 266                 if( Conf_Chroot[0] )
 267                 {
 268                         /* Chroot */
 269                         if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
 270
 271                         if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
 272                         else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
 273                 }
 274
 275                 if( Conf_GID != 0 )
 276                 {
 277                         /* Set new group ID */
 278                         if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
 279                 }
 280                 if( Conf_UID != 0 )
 281                 {
 282                         /* Set new user ID */
 283                         if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
 284                 }
 285
 286                 /* Normally a child process is forked which isn't any longer
 287                  * connected to ther controlling terminal. Use "--nodaemon"
 288                  * to disable this "daemon mode" (useful for debugging). */
 289                 if( ! NGIRCd_NoDaemon )
 290                 {
 291                         /* fork child process */
 292                         pid = (long)fork( );
 293                         if( pid > 0 )
 294                         {
 295                                 /* "Old" process: exit. */
 296                                 exit( 0 );
 297                         }
 298                         if( pid < 0 )
 299                         {
 300                                 /* Error!? */
 301                                 fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
 302                                 exit( 1 );
 303                         }
 304
 305                         /* New child process */
 306                         (void)setsid( );
 307                         chdir( "/" );
 308
 309                         /* Detach stdin, stdout and stderr */
 310                         Setup_FDStreams( );
 311                 }
 312
 313                 /* Create PID file */
 314                 pid = (long) getpid( );
 315                 Pidfile_Create( pid );
 316
 317                 /* Show user, group, and PID of the running daemon */
 318                 pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
 319                 Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.", pwd ? pwd->pw_name : "unknown", (long)getuid( ), grp ? grp->gr_name : "unknown", (long)getgid( ), pid);
 320
 321                 /* Change working directory to home directory of the user
 322                  * we are running as (when not running chroot()'ed!) */
 323                 if( Conf_UID != 0 && ! Conf_Chroot[0] )
 324                 {
 325                         struct passwd *pwd;
 326
 327                         pwd = getpwuid( Conf_UID );
 328                         if( pwd != NULL )
 329                         {
 330                                 if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
 331                                 else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
 332                         }
 333                         else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
 334                 }
 335
 336                 /* Initialize modules, part II: these functions are eventually
 337                  * called with already dropped privileges ... */
 338                 Resolve_Init( );
 339                 Lists_Init( );
 340                 Channel_Init( );
 341                 Client_Init( );
 342 #ifdef RENDEZVOUS
 343                 Rendezvous_Init( );
 344 #endif
 345                 Conn_Init( );
 346
 347 #ifdef DEBUG
 348                 /* Redirect stderr handle to "error file" for debugging
 349                  * when not running in "no daemon" mode: */
 350                 if( ! NGIRCd_NoDaemon ) Log_InitErrorfile( );
 351 #endif
 352
 353                 /* Signal-Handler initialisieren */
 354                 Initialize_Signal_Handler( );
 355
 356                 /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
 357                  * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
 358                  * sind in doc/Protocol.txt beschrieben. */
 359 #ifdef IRCPLUS
 360                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
 361 #ifdef ZLIB
 362                 strcat( NGIRCd_ProtoID, "Z" );
 363 #endif
 364                 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
 365 #else
 366                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
 367 #endif
 368                 strcat( NGIRCd_ProtoID, " P" );
 369 #ifdef ZLIB
 370                 strcat( NGIRCd_ProtoID, "Z" );
 371 #endif
 372                 Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
 373
 374                 /* Vordefinierte Channels anlegen */
 375                 Channel_InitPredefined( );
 376
 377                 /* Listen-Ports initialisieren */
 378                 if( Conn_InitListeners( ) < 1 )
 379                 {
 380                         Log( LOG_ALERT, "Server isn't listening on a single port!" );
 381                         Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 382                         Pidfile_Delete( );
 383                         exit( 1 );
 384                 }
 385
 386                 /* Hauptschleife */
 387                 Conn_Handler( );
 388
 389                 /* Alles abmelden */
 390                 Conn_Exit( );
 391 #ifdef RENDEZVOUS
 392                 Rendezvous_Exit( );
 393 #endif
 394                 Client_Exit( );
 395                 Channel_Exit( );
 396                 Lists_Exit( );
 397                 Log_Exit( );
 398
 399                 Pidfile_Delete( );
 400         }
 401
 402         return 0;
 403 } /* main */
 404
 405
 406 /**
 407  * Generate ngIRCd "version string".
 408  * This string is generated once and then stored in NGIRCd_Version for
 409  * further usage, for example by the IRC command VERSION and the --version
 410  * command line switch.
 411  */
 412 LOCAL void
 413 Fill_Version( void )
 414 {
 415         NGIRCd_VersionAddition[0] = '\0';
 416
 417 #ifdef SYSLOG
 418         strcpy( NGIRCd_VersionAddition, "SYSLOG" );
 419 #endif
 420 #ifdef ZLIB
 421         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 422         strcat( NGIRCd_VersionAddition, "ZLIB" );
 423 #endif
 424 #ifdef TCPWRAP
 425         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 426         strcat( NGIRCd_VersionAddition, "TCPWRAP" );
 427 #endif
 428 #ifdef RENDEZVOUS
 429         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 430         strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
 431 #endif
 432 #ifdef IDENTAUTH
 433         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 434         strcat( NGIRCd_VersionAddition, "IDENT" );
 435 #endif
 436 #ifdef DEBUG
 437         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 438         strcat( NGIRCd_VersionAddition, "DEBUG" );
 439 #endif
 440 #ifdef SNIFFER
 441         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 442         strcat( NGIRCd_VersionAddition, "SNIFFER" );
 443 #endif
 444 #ifdef STRICT_RFC
 445         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 446         strcat( NGIRCd_VersionAddition, "RFC" );
 447 #endif
 448 #ifdef IRCPLUS
 449         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 450         strcat( NGIRCd_VersionAddition, "IRCPLUS" );
 451 #endif
 452
 453         if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
 454         strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
 455         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 456         strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
 457         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 458         strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
 459
 460 #ifdef CVSDATE
 461         snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
 462 #else
 463         snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
 464 #endif
 465 } /* Fill_Version */
 466
 467
 468 /**
 469  * Reload the server configuration file.
 470  */
 471 GLOBAL void
 472 NGIRCd_Rehash( void )
 473 {
 474         char old_name[CLIENT_ID_LEN];
 475
 476         Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
 477         NGIRCd_SignalRehash = false;
 478
 479         /* Close down all listening sockets */
 480         Conn_ExitListeners( );
 481
 482         /* Remember old server name */
 483         strcpy( old_name, Conf_ServerName );
 484
 485         /* Re-read configuration ... */
 486         Conf_Rehash( );
 487
 488         /* Recover old server name: it can't be changed during run-time */
 489         if( strcmp( old_name, Conf_ServerName ) != 0 )
 490         {
 491                 strcpy( Conf_ServerName, old_name );
 492                 Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
 493         }
 494
 495         /* Create new pre-defined channels */
 496         Channel_InitPredefined( );
 497
 498         /* Start listening on sockets */
 499         Conn_InitListeners( );
 500
 501         /* Sync configuration with established connections */
 502         Conn_SyncServerStruct( );
 503
 504         Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
 505 } /* NGIRCd_Rehash */
 506
 507
 508 /**
 509  * Initialize the signal handler.
 510  */
 511 LOCAL void
 512 Initialize_Signal_Handler( void )
 513 {
 514         /* Signal-Handler initialisieren: einige Signale
 515          * werden ignoriert, andere speziell behandelt. */
 516
 517 #ifdef HAVE_SIGACTION
 518         /* sigaction() ist vorhanden */
 519
 520         struct sigaction saction;
 521
 522         /* Signal-Struktur initialisieren */
 523         memset( &saction, 0, sizeof( saction ));
 524         saction.sa_handler = Signal_Handler;
 525 #ifdef SA_RESTART
 526         saction.sa_flags |= SA_RESTART;
 527 #endif
 528 #ifdef SA_NOCLDWAIT
 529         saction.sa_flags |= SA_NOCLDWAIT;
 530 #endif
 531
 532         /* Signal-Handler einhaengen */
 533         sigaction( SIGINT, &saction, NULL );
 534         sigaction( SIGQUIT, &saction, NULL );
 535         sigaction( SIGTERM, &saction, NULL);
 536         sigaction( SIGHUP, &saction, NULL);
 537         sigaction( SIGCHLD, &saction, NULL);
 538
 539         /* einige Signale ignorieren */
 540         saction.sa_handler = SIG_IGN;
 541         sigaction( SIGPIPE, &saction, NULL );
 542 #else
 543         /* kein sigaction() vorhanden */
 544
 545         /* Signal-Handler einhaengen */
 546         signal( SIGINT, Signal_Handler );
 547         signal( SIGQUIT, Signal_Handler );
 548         signal( SIGTERM, Signal_Handler );
 549         signal( SIGHUP, Signal_Handler );
 550         signal( SIGCHLD, Signal_Handler );
 551
 552         /* einige Signale ignorieren */
 553         signal( SIGPIPE, SIG_IGN );
 554 #endif
 555 } /* Initialize_Signal_Handler */
 556
 557
 558 /**
 559  * Signal handler of ngIRCd.
 560  * This function is called whenever ngIRCd catches a signal sent by the
 561  * user and/or the system to it. For example SIGTERM and SIGHUP.
 562  * @param Signal Number of the signal to handle.
 563  */
 564 LOCAL void
 565 Signal_Handler( int Signal )
 566 {
 567         switch( Signal )
 568         {
 569                 case SIGTERM:
 570                 case SIGINT:
 571                 case SIGQUIT:
 572                         /* wir soll(t)en uns wohl beenden ... */
 573                         NGIRCd_SignalQuit = true;
 574                         break;
 575                 case SIGHUP:
 576                         /* Konfiguration neu einlesen: */
 577                         NGIRCd_SignalRehash = true;
 578                         break;
 579                 case SIGCHLD:
 580                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 581                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 582                         break;
 583 #ifdef DEBUG
 584                 default:
 585                         /* unbekanntes bzw. unbehandeltes Signal */
 586                         Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
 587 #endif
 588         }
 589 } /* Signal_Handler */
 590
 591
 592 /**
 593  * Display copyright and version information of ngIRCd on the console.
 594  */
 595 LOCAL void
 596 Show_Version( void )
 597 {
 598         puts( NGIRCd_Version );
 599         puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
 600         puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
 601         puts( "This is free software; see the source for copying conditions. There is NO" );
 602         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 603 } /* Show_Version */
 604
 605
 606 /**
 607  * Display a short help text on the console.
 608  * This help depends on the configuration of the executable and only shows
 609  * options that are actually enabled.
 610  */
 611 LOCAL void
 612 Show_Help( void )
 613 {
 614 #ifdef DEBUG
 615         puts( "  -d, --debug        log extra debug messages" );
 616 #endif
 617         puts( "  -f, --config <f>   use file <f> as configuration file" );
 618         puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
 619         puts( "  -p, --passive      disable automatic connections to other servers" );
 620 #ifdef SNIFFER
 621         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 622 #endif
 623         puts( "  -t, --configtest   read, validate and display configuration; then exit" );
 624         puts( "      --version      output version information and exit" );
 625         puts( "      --help         display this help and exit" );
 626 } /* Show_Help */
 627
 628
 629 /**
 630  * Delete the file containing the process ID (PID).
 631  */
 632 LOCAL void
 633 Pidfile_Delete( void )
 634 {
 635         /* Pidfile configured? */
 636         if( ! Conf_PidFile[0] ) return;
 637
 638 #ifdef DEBUG
 639         Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
 640 #endif
 641
 642         if( unlink( Conf_PidFile ))
 643                 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
 644 } /* Pidfile_Delete */
 645
 646
 647 /**
 648  * Create the file containing the process ID of ngIRCd ("PID file").
 649  * @param pid The process ID to be stored in this file.
 650  */
 651 LOCAL void
 652 Pidfile_Create( long pid )
 653 {
 654         FILE *pidf;
 655
 656         /* Pidfile configured? */
 657         if( ! Conf_PidFile[0] ) return;
 658
 659 #ifdef DEBUG
 660         Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
 661 #endif
 662
 663         pidf = fopen( Conf_PidFile, "w" );
 664
 665         if( ! pidf )
 666         {
 667                 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 668                 return;
 669         }
 670
 671         if( fprintf( pidf, "%ld\n", pid ) < 0 )
 672                 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
 673
 674         if( fclose(pidf) != 0 )
 675                 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 676 } /* Pidfile_Create */
 677
 678
 679 /**
 680  * Redirect stdin, stdout and stderr to apropriate file handles.
 681  */
 682 LOCAL void
 683 Setup_FDStreams( void )
 684 {
 685         int fd;
 686
 687         /* Test if we can open /dev/null for reading and writing. If not
 688          * we are most probably chrooted already and the server has been
 689          * restarted. So we simply don't try to redirect stdXXX ... */
 690         fd = open( "/dev/null", O_RDWR );
 691         if ( fd < 0 ) return;
 692
 693         /* Close "old" stdin/out/err descriptors */
 694         close( 0 ); close( 1 ); close( 2 );
 695
 696         /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
 697         dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
 698
 699         /* Close newly opened file descriptor if not stdin/out/err */
 700         if( fd > 2 ) close( fd );
 701 } /* Setup_FDStreams */
 702
 703
 704 /* -eof- */