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  * Main program -- main()
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 static char UNUSED id[] = "$Id: ngircd.c,v 1.94 2005/02/11 13:52:37 alex Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <signal.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <time.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <sys/wait.h>
  31 #include <fcntl.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34
  35 #include "defines.h"
  36 #include "resolve.h"
  37 #include "conn.h"
  38 #include "client.h"
  39 #include "channel.h"
  40 #include "conf.h"
  41 #include "cvs-version.h"
  42 #include "lists.h"
  43 #include "log.h"
  44 #include "parse.h"
  45 #include "irc.h"
  46
  47 #ifdef RENDEZVOUS
  48 #include "rendezvous.h"
  49 #endif
  50
  51 #include "exp.h"
  52 #include "ngircd.h"
  53
  54
  55 LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
  56 LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
  57
  58 LOCAL VOID Show_Version PARAMS(( VOID ));
  59 LOCAL VOID Show_Help PARAMS(( VOID ));
  60
  61 LOCAL VOID Pidfile_Create PARAMS(( LONG ));
  62 LOCAL VOID Pidfile_Delete PARAMS(( VOID ));
  63
  64 LOCAL VOID Fill_Version PARAMS(( VOID ));
  65
  66 LOCAL VOID Setup_FDStreams PARAMS(( VOID ));
  67
  68
  69 GLOBAL int
  70 main( int argc, const char *argv[] )
  71 {
  72         struct passwd *pwd;
  73         struct group *grp;
  74         BOOLEAN ok, configtest = FALSE;
  75         LONG pid, n;
  76         INT i;
  77
  78         umask( 0077 );
  79
  80         NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE;
  81         NGIRCd_NoDaemon = NGIRCd_Passive = FALSE;
  82 #ifdef DEBUG
  83         NGIRCd_Debug = FALSE;
  84 #endif
  85 #ifdef SNIFFER
  86         NGIRCd_Sniffer = FALSE;
  87 #endif
  88         strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
  89         strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
  90
  91         Fill_Version( );
  92
  93         /* Kommandozeile parsen */
  94         for( i = 1; i < argc; i++ )
  95         {
  96                 ok = FALSE;
  97                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  98                 {
  99                         /* Lange Option */
 100
 101                         if( strcmp( argv[i], "--config" ) == 0 )
 102                         {
 103                                 if( i + 1 < argc )
 104                                 {
 105                                         /* Ok, there's an parameter left */
 106                                         strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 107
 108                                         /* next parameter */
 109                                         i++; ok = TRUE;
 110                                 }
 111                         }
 112                         if( strcmp( argv[i], "--configtest" ) == 0 )
 113                         {
 114                                 configtest = TRUE;
 115                                 ok = TRUE;
 116                         }
 117 #ifdef DEBUG
 118                         if( strcmp( argv[i], "--debug" ) == 0 )
 119                         {
 120                                 NGIRCd_Debug = TRUE;
 121                                 ok = TRUE;
 122                         }
 123 #endif
 124                         if( strcmp( argv[i], "--help" ) == 0 )
 125                         {
 126                                 Show_Version( );
 127                                 puts( "" ); Show_Help( ); puts( "" );
 128                                 exit( 1 );
 129                         }
 130                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 131                         {
 132                                 NGIRCd_NoDaemon = TRUE;
 133                                 ok = TRUE;
 134                         }
 135                         if( strcmp( argv[i], "--passive" ) == 0 )
 136                         {
 137                                 NGIRCd_Passive = TRUE;
 138                                 ok = TRUE;
 139                         }
 140 #ifdef SNIFFER
 141                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 142                         {
 143                                 NGIRCd_Sniffer = TRUE;
 144                                 ok = TRUE;
 145                         }
 146 #endif
 147                         if( strcmp( argv[i], "--version" ) == 0 )
 148                         {
 149                                 Show_Version( );
 150                                 exit( 1 );
 151                         }
 152                 }
 153                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 154                 {
 155                         /* Kurze Option */
 156
 157                         for( n = 1; n < (LONG)strlen( argv[i] ); n++ )
 158                         {
 159                                 ok = FALSE;
 160 #ifdef DEBUG
 161                                 if( argv[i][n] == 'd' )
 162                                 {
 163                                         NGIRCd_Debug = TRUE;
 164                                         ok = TRUE;
 165                                 }
 166 #endif
 167                                 if( argv[i][n] == 'f' )
 168                                 {
 169                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 170                                         {
 171                                                 /* Ok, next character is a blank */
 172                                                 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 173
 174                                                 /* go to the following parameter */
 175                                                 i++; n = (LONG)strlen( argv[i] );
 176                                                 ok = TRUE;
 177                                         }
 178                                 }
 179                                 if( argv[i][n] == 'n' )
 180                                 {
 181                                         NGIRCd_NoDaemon = TRUE;
 182                                         ok = TRUE;
 183                                 }
 184                                 if( argv[i][n] == 'p' )
 185                                 {
 186                                         NGIRCd_Passive = TRUE;
 187                                         ok = TRUE;
 188                                 }
 189 #ifdef SNIFFER
 190                                 if( argv[i][n] == 's' )
 191                                 {
 192                                         NGIRCd_Sniffer = TRUE;
 193                                         ok = TRUE;
 194                                 }
 195 #endif
 196                                 if( argv[i][n] == 't' )
 197                                 {
 198                                         configtest = TRUE;
 199                                         ok = TRUE;
 200                                 }
 201
 202                                 if( ! ok )
 203                                 {
 204                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
 205                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 206                                         exit( 1 );
 207                                 }
 208                         }
 209
 210                 }
 211                 if( ! ok )
 212                 {
 213                         printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
 214                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 215                         exit( 1 );
 216                 }
 217         }
 218
 219         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 220         NGIRCd_DebugLevel[0] = '\0';
 221 #ifdef DEBUG
 222         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 223 #endif
 224 #ifdef SNIFFER
 225         if( NGIRCd_Sniffer )
 226         {
 227                 NGIRCd_Debug = TRUE;
 228                 strcpy( NGIRCd_DebugLevel, "2" );
 229         }
 230 #endif
 231
 232         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 233         if( configtest )
 234         {
 235                 Show_Version( ); puts( "" );
 236                 exit( Conf_Test( ));
 237         }
 238
 239         while( ! NGIRCd_SignalQuit )
 240         {
 241                 /* Initialize global variables */
 242                 NGIRCd_Start = time( NULL );
 243                 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 244
 245                 NGIRCd_SignalRehash = FALSE;
 246                 NGIRCd_SignalRestart = FALSE;
 247                 NGIRCd_SignalQuit = FALSE;
 248
 249                 /* Initialize modules, part I */
 250                 Log_Init( );
 251                 Conf_Init( );
 252
 253                 if( Conf_Chroot[0] )
 254                 {
 255                         /* Chroot */
 256                         if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
 257
 258                         if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
 259                         else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
 260                 }
 261
 262                 if( Conf_GID != 0 )
 263                 {
 264                         /* Set new group ID */
 265                         if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
 266                 }
 267                 if( Conf_UID != 0 )
 268                 {
 269                         /* Set new user ID */
 270                         if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
 271                 }
 272
 273                 /* Normally a child process is forked which isn't any longer
 274                  * connected to ther controlling terminal. Use "--nodaemon"
 275                  * to disable this "daemon mode" (useful for debugging). */
 276                 if( ! NGIRCd_NoDaemon )
 277                 {
 278                         /* fork child process */
 279                         pid = (LONG)fork( );
 280                         if( pid > 0 )
 281                         {
 282                                 /* "Old" process: exit. */
 283                                 exit( 0 );
 284                         }
 285                         if( pid < 0 )
 286                         {
 287                                 /* Error!? */
 288                                 fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
 289                                 exit( 1 );
 290                         }
 291
 292                         /* New child process */
 293                         (VOID)setsid( );
 294                         chdir( "/" );
 295
 296                         /* Detach stdin, stdout and stderr */
 297                         (VOID)Setup_FDStreams( );
 298                 }
 299
 300                 /* Create PID file */
 301                 pid = (LONG) getpid( );
 302                 Pidfile_Create( pid );
 303
 304                 /* Show user, group, and PID of the running daemon */
 305                 pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
 306                 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);
 307
 308                 /* Change working directory to home directory of the user
 309                  * we are running as (when not running chroot()'ed!) */
 310                 if( Conf_UID != 0 && ! Conf_Chroot[0] )
 311                 {
 312                         struct passwd *pwd;
 313
 314                         pwd = getpwuid( Conf_UID );
 315                         if( pwd != NULL )
 316                         {
 317                                 if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
 318                                 else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
 319                         }
 320                         else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
 321                 }
 322
 323                 /* Initialize modules, part II: these functions are eventually
 324                  * called with already dropped privileges ... */
 325                 Resolve_Init( );
 326                 Lists_Init( );
 327                 Channel_Init( );
 328                 Client_Init( );
 329 #ifdef RENDEZVOUS
 330                 Rendezvous_Init( );
 331 #endif
 332                 Conn_Init( );
 333
 334 #ifdef DEBUG
 335                 /* Redirect stderr handle to "error file" for debugging
 336                  * when not running in "no daemon" mode: */
 337                 if( ! NGIRCd_NoDaemon ) Log_InitErrorfile( );
 338 #endif
 339
 340                 /* Signal-Handler initialisieren */
 341                 Initialize_Signal_Handler( );
 342
 343                 /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
 344                  * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
 345                  * sind in doc/Protocol.txt beschrieben. */
 346 #ifdef IRCPLUS
 347                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
 348 #ifdef ZLIB
 349                 strcat( NGIRCd_ProtoID, "Z" );
 350 #endif
 351                 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
 352 #else
 353                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
 354 #endif
 355                 strcat( NGIRCd_ProtoID, " P" );
 356 #ifdef ZLIB
 357                 strcat( NGIRCd_ProtoID, "Z" );
 358 #endif
 359                 Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
 360
 361                 /* Vordefinierte Channels anlegen */
 362                 Channel_InitPredefined( );
 363
 364                 /* Listen-Ports initialisieren */
 365                 if( Conn_InitListeners( ) < 1 )
 366                 {
 367                         Log( LOG_ALERT, "Server isn't listening on a single port!" );
 368                         Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 369                         Pidfile_Delete( );
 370                         exit( 1 );
 371                 }
 372
 373                 /* Hauptschleife */
 374                 Conn_Handler( );
 375
 376                 /* Alles abmelden */
 377                 Conn_Exit( );
 378 #ifdef RENDEZVOUS
 379                 Rendezvous_Exit( );
 380 #endif
 381                 Client_Exit( );
 382                 Channel_Exit( );
 383                 Lists_Exit( );
 384                 Log_Exit( );
 385
 386                 Pidfile_Delete( );
 387         }
 388
 389         return 0;
 390 } /* main */
 391
 392
 393 LOCAL VOID
 394 Fill_Version( VOID )
 395 {
 396         NGIRCd_VersionAddition[0] = '\0';
 397
 398 #ifdef SYSLOG
 399         strcpy( NGIRCd_VersionAddition, "SYSLOG" );
 400 #endif
 401 #ifdef ZLIB
 402         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 403         strcat( NGIRCd_VersionAddition, "ZLIB" );
 404 #endif
 405 #ifdef TCPWRAP
 406         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 407         strcat( NGIRCd_VersionAddition, "TCPWRAP" );
 408 #endif
 409 #ifdef RENDEZVOUS
 410         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 411         strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
 412 #endif
 413 #ifdef IDENTAUTH
 414         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 415         strcat( NGIRCd_VersionAddition, "IDENT" );
 416 #endif
 417 #ifdef DEBUG
 418         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 419         strcat( NGIRCd_VersionAddition, "DEBUG" );
 420 #endif
 421 #ifdef SNIFFER
 422         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 423         strcat( NGIRCd_VersionAddition, "SNIFFER" );
 424 #endif
 425 #ifdef STRICT_RFC
 426         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 427         strcat( NGIRCd_VersionAddition, "RFC" );
 428 #endif
 429 #ifdef IRCPLUS
 430         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 431         strcat( NGIRCd_VersionAddition, "IRCPLUS" );
 432 #endif
 433
 434         if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
 435         strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
 436         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 437         strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
 438         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 439         strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
 440
 441 #ifdef CVSDATE
 442         snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
 443 #else
 444         snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
 445 #endif
 446 } /* Fill_Version */
 447
 448
 449 GLOBAL VOID
 450 NGIRCd_Rehash( VOID )
 451 {
 452         CHAR old_name[CLIENT_ID_LEN];
 453
 454         Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
 455         NGIRCd_SignalRehash = FALSE;
 456
 457         /* Close down all listening sockets */
 458         Conn_ExitListeners( );
 459
 460         /* Remember old server name */
 461         strcpy( old_name, Conf_ServerName );
 462
 463         /* Re-read configuration ... */
 464         Conf_Rehash( );
 465
 466         /* Recover old server name: it can't be changed during run-time */
 467         if( strcmp( old_name, Conf_ServerName ) != 0 )
 468         {
 469                 strcpy( Conf_ServerName, old_name );
 470                 Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
 471         }
 472
 473         /* Create new pre-defined channels */
 474         Channel_InitPredefined( );
 475
 476         /* Start listening on sockets */
 477         Conn_InitListeners( );
 478
 479         /* Sync configuration with established connections */
 480         Conn_SyncServerStruct( );
 481
 482         Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
 483 } /* NGIRCd_Rehash */
 484
 485
 486 LOCAL VOID
 487 Initialize_Signal_Handler( VOID )
 488 {
 489         /* Signal-Handler initialisieren: einige Signale
 490          * werden ignoriert, andere speziell behandelt. */
 491
 492 #ifdef HAVE_SIGACTION
 493         /* sigaction() ist vorhanden */
 494
 495         struct sigaction saction;
 496
 497         /* Signal-Struktur initialisieren */
 498         memset( &saction, 0, sizeof( saction ));
 499         saction.sa_handler = Signal_Handler;
 500 #ifdef SA_RESTART
 501         saction.sa_flags |= SA_RESTART;
 502 #endif
 503 #ifdef SA_NOCLDWAIT
 504         saction.sa_flags |= SA_NOCLDWAIT;
 505 #endif
 506
 507         /* Signal-Handler einhaengen */
 508         sigaction( SIGINT, &saction, NULL );
 509         sigaction( SIGQUIT, &saction, NULL );
 510         sigaction( SIGTERM, &saction, NULL);
 511         sigaction( SIGHUP, &saction, NULL);
 512         sigaction( SIGCHLD, &saction, NULL);
 513
 514         /* einige Signale ignorieren */
 515         saction.sa_handler = SIG_IGN;
 516         sigaction( SIGPIPE, &saction, NULL );
 517 #else
 518         /* kein sigaction() vorhanden */
 519
 520         /* Signal-Handler einhaengen */
 521         signal( SIGINT, Signal_Handler );
 522         signal( SIGQUIT, Signal_Handler );
 523         signal( SIGTERM, Signal_Handler );
 524         signal( SIGHUP, Signal_Handler );
 525         signal( SIGCHLD, Signal_Handler );
 526
 527         /* einige Signale ignorieren */
 528         signal( SIGPIPE, SIG_IGN );
 529 #endif
 530 } /* Initialize_Signal_Handler */
 531
 532
 533 LOCAL VOID
 534 Signal_Handler( INT Signal )
 535 {
 536         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 537          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 538          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 539
 540         switch( Signal )
 541         {
 542                 case SIGTERM:
 543                 case SIGINT:
 544                 case SIGQUIT:
 545                         /* wir soll(t)en uns wohl beenden ... */
 546                         NGIRCd_SignalQuit = TRUE;
 547                         break;
 548                 case SIGHUP:
 549                         /* Konfiguration neu einlesen: */
 550                         NGIRCd_SignalRehash = TRUE;
 551                         break;
 552                 case SIGCHLD:
 553                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 554                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 555                         break;
 556 #ifdef DEBUG
 557                 default:
 558                         /* unbekanntes bzw. unbehandeltes Signal */
 559                         Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
 560 #endif
 561         }
 562 } /* Signal_Handler */
 563
 564
 565 LOCAL VOID
 566 Show_Version( VOID )
 567 {
 568         puts( NGIRCd_Version );
 569         puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
 570         puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
 571         puts( "This is free software; see the source for copying conditions. There is NO" );
 572         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 573 } /* Show_Version */
 574
 575
 576 LOCAL VOID
 577 Show_Help( VOID )
 578 {
 579 #ifdef DEBUG
 580         puts( "  -d, --debug        log extra debug messages" );
 581 #endif
 582         puts( "  -f, --config <f>   use file <f> as configuration file" );
 583         puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
 584         puts( "  -p, --passive      disable automatic connections to other servers" );
 585 #ifdef SNIFFER
 586         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 587 #endif
 588         puts( "  -t, --configtest   read, validate and display configuration; then exit" );
 589         puts( "      --version      output version information and exit" );
 590         puts( "      --help         display this help and exit" );
 591 } /* Show_Help */
 592
 593
 594 LOCAL VOID
 595 Pidfile_Delete( VOID )
 596 {
 597         /* Pidfile configured? */
 598         if( ! Conf_PidFile[0] ) return;
 599
 600 #ifdef DEBUG
 601         Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
 602 #endif
 603
 604         if( unlink( Conf_PidFile ))
 605                 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
 606 } /* Pidfile_Delete */
 607
 608
 609 LOCAL VOID
 610 Pidfile_Create( LONG pid )
 611 {
 612         FILE *pidf;
 613
 614         /* Pidfile configured? */
 615         if( ! Conf_PidFile[0] ) return;
 616
 617 #ifdef DEBUG
 618         Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
 619 #endif
 620
 621         pidf = fopen( Conf_PidFile, "w" );
 622
 623         if( ! pidf )
 624         {
 625                 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 626                 return;
 627         }
 628
 629         if( fprintf( pidf, "%ld\n", pid ) < 0 )
 630                 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
 631
 632         if( fclose(pidf) != 0 )
 633                 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 634 } /* Pidfile_Create */
 635
 636
 637 LOCAL VOID
 638 Setup_FDStreams( VOID )
 639 {
 640         INT fd;
 641
 642         /* Test if we can open /dev/null for reading and writing. If not
 643          * we are most probably chrooted already and the server has been
 644          * restarted. So we simply don't try to redirect stdXXX ... */
 645         fd = open( "/dev/null", O_RDWR );
 646         if ( fd < 0 ) return;
 647
 648         /* Close "old" stdin/out/err descriptors */
 649         close( 0 ); close( 1 ); close( 2 );
 650
 651         /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
 652         dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
 653
 654         /* Close newly opened file descriptor if not stdin/out/err */
 655         if( fd > 2 ) close( fd );
 656 } /* Setup_FDStreams */
 657
 658
 659 /* -eof- */