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 1.95 2005/03/19 18:43:49 fw 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         bool ok, configtest = false;
  75         long pid;
  76         int i;
  77         size_t n;
  78
  79         umask( 0077 );
  80
  81         NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = false;
  82         NGIRCd_NoDaemon = NGIRCd_Passive = false;
  83 #ifdef DEBUG
  84         NGIRCd_Debug = false;
  85 #endif
  86 #ifdef SNIFFER
  87         NGIRCd_Sniffer = false;
  88 #endif
  89         strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
  90         strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
  91
  92         Fill_Version( );
  93
  94         /* Kommandozeile parsen */
  95         for( i = 1; i < argc; i++ )
  96         {
  97                 ok = false;
  98                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
  99                 {
 100                         /* Lange Option */
 101
 102                         if( strcmp( argv[i], "--config" ) == 0 )
 103                         {
 104                                 if( i + 1 < argc )
 105                                 {
 106                                         /* Ok, there's an parameter left */
 107                                         strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 108
 109                                         /* next parameter */
 110                                         i++; ok = true;
 111                                 }
 112                         }
 113                         if( strcmp( argv[i], "--configtest" ) == 0 )
 114                         {
 115                                 configtest = true;
 116                                 ok = true;
 117                         }
 118 #ifdef DEBUG
 119                         if( strcmp( argv[i], "--debug" ) == 0 )
 120                         {
 121                                 NGIRCd_Debug = true;
 122                                 ok = true;
 123                         }
 124 #endif
 125                         if( strcmp( argv[i], "--help" ) == 0 )
 126                         {
 127                                 Show_Version( );
 128                                 puts( "" ); Show_Help( ); puts( "" );
 129                                 exit( 1 );
 130                         }
 131                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 132                         {
 133                                 NGIRCd_NoDaemon = true;
 134                                 ok = true;
 135                         }
 136                         if( strcmp( argv[i], "--passive" ) == 0 )
 137                         {
 138                                 NGIRCd_Passive = true;
 139                                 ok = true;
 140                         }
 141 #ifdef SNIFFER
 142                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 143                         {
 144                                 NGIRCd_Sniffer = true;
 145                                 ok = true;
 146                         }
 147 #endif
 148                         if( strcmp( argv[i], "--version" ) == 0 )
 149                         {
 150                                 Show_Version( );
 151                                 exit( 1 );
 152                         }
 153                 }
 154                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 155                 {
 156                         /* Kurze Option */
 157                         for( n = 1; n < 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++;
 176                                                 n = strlen( argv[i] );
 177                                                 ok = true;
 178                                         }
 179                                 }
 180                                 if( argv[i][n] == 'n' )
 181                                 {
 182                                         NGIRCd_NoDaemon = true;
 183                                         ok = true;
 184                                 }
 185                                 if( argv[i][n] == 'p' )
 186                                 {
 187                                         NGIRCd_Passive = true;
 188                                         ok = true;
 189                                 }
 190 #ifdef SNIFFER
 191                                 if( argv[i][n] == 's' )
 192                                 {
 193                                         NGIRCd_Sniffer = true;
 194                                         ok = true;
 195                                 }
 196 #endif
 197                                 if( argv[i][n] == 't' )
 198                                 {
 199                                         configtest = true;
 200                                         ok = true;
 201                                 }
 202
 203                                 if( ! ok )
 204                                 {
 205                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
 206                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 207                                         exit( 1 );
 208                                 }
 209                         }
 210
 211                 }
 212                 if( ! ok )
 213                 {
 214                         printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
 215                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 216                         exit( 1 );
 217                 }
 218         }
 219
 220         /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
 221         NGIRCd_DebugLevel[0] = '\0';
 222 #ifdef DEBUG
 223         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 224 #endif
 225 #ifdef SNIFFER
 226         if( NGIRCd_Sniffer )
 227         {
 228                 NGIRCd_Debug = true;
 229                 strcpy( NGIRCd_DebugLevel, "2" );
 230         }
 231 #endif
 232
 233         /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
 234         if( configtest )
 235         {
 236                 Show_Version( ); puts( "" );
 237                 exit( Conf_Test( ));
 238         }
 239
 240         while( ! NGIRCd_SignalQuit )
 241         {
 242                 /* Initialize global variables */
 243                 NGIRCd_Start = time( NULL );
 244                 (void)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 245
 246                 NGIRCd_SignalRehash = false;
 247                 NGIRCd_SignalRestart = false;
 248                 NGIRCd_SignalQuit = false;
 249
 250                 /* Initialize modules, part I */
 251                 Log_Init( );
 252                 Conf_Init( );
 253
 254                 if( Conf_Chroot[0] )
 255                 {
 256                         /* Chroot */
 257                         if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
 258
 259                         if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
 260                         else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
 261                 }
 262
 263                 if( Conf_GID != 0 )
 264                 {
 265                         /* Set new group ID */
 266                         if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
 267                 }
 268                 if( Conf_UID != 0 )
 269                 {
 270                         /* Set new user ID */
 271                         if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
 272                 }
 273
 274                 /* Normally a child process is forked which isn't any longer
 275                  * connected to ther controlling terminal. Use "--nodaemon"
 276                  * to disable this "daemon mode" (useful for debugging). */
 277                 if( ! NGIRCd_NoDaemon )
 278                 {
 279                         /* fork child process */
 280                         pid = (long)fork( );
 281                         if( pid > 0 )
 282                         {
 283                                 /* "Old" process: exit. */
 284                                 exit( 0 );
 285                         }
 286                         if( pid < 0 )
 287                         {
 288                                 /* Error!? */
 289                                 fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
 290                                 exit( 1 );
 291                         }
 292
 293                         /* New child process */
 294                         (void)setsid( );
 295                         chdir( "/" );
 296
 297                         /* Detach stdin, stdout and stderr */
 298                         Setup_FDStreams( );
 299                 }
 300
 301                 /* Create PID file */
 302                 pid = (long) getpid( );
 303                 Pidfile_Create( pid );
 304
 305                 /* Show user, group, and PID of the running daemon */
 306                 pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
 307                 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);
 308
 309                 /* Change working directory to home directory of the user
 310                  * we are running as (when not running chroot()'ed!) */
 311                 if( Conf_UID != 0 && ! Conf_Chroot[0] )
 312                 {
 313                         struct passwd *pwd;
 314
 315                         pwd = getpwuid( Conf_UID );
 316                         if( pwd != NULL )
 317                         {
 318                                 if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
 319                                 else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
 320                         }
 321                         else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
 322                 }
 323
 324                 /* Initialize modules, part II: these functions are eventually
 325                  * called with already dropped privileges ... */
 326                 Resolve_Init( );
 327                 Lists_Init( );
 328                 Channel_Init( );
 329                 Client_Init( );
 330 #ifdef RENDEZVOUS
 331                 Rendezvous_Init( );
 332 #endif
 333                 Conn_Init( );
 334
 335 #ifdef DEBUG
 336                 /* Redirect stderr handle to "error file" for debugging
 337                  * when not running in "no daemon" mode: */
 338                 if( ! NGIRCd_NoDaemon ) Log_InitErrorfile( );
 339 #endif
 340
 341                 /* Signal-Handler initialisieren */
 342                 Initialize_Signal_Handler( );
 343
 344                 /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
 345                  * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
 346                  * sind in doc/Protocol.txt beschrieben. */
 347 #ifdef IRCPLUS
 348                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
 349 #ifdef ZLIB
 350                 strcat( NGIRCd_ProtoID, "Z" );
 351 #endif
 352                 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
 353 #else
 354                 sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
 355 #endif
 356                 strcat( NGIRCd_ProtoID, " P" );
 357 #ifdef ZLIB
 358                 strcat( NGIRCd_ProtoID, "Z" );
 359 #endif
 360                 Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
 361
 362                 /* Vordefinierte Channels anlegen */
 363                 Channel_InitPredefined( );
 364
 365                 /* Listen-Ports initialisieren */
 366                 if( Conn_InitListeners( ) < 1 )
 367                 {
 368                         Log( LOG_ALERT, "Server isn't listening on a single port!" );
 369                         Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 370                         Pidfile_Delete( );
 371                         exit( 1 );
 372                 }
 373
 374                 /* Hauptschleife */
 375                 Conn_Handler( );
 376
 377                 /* Alles abmelden */
 378                 Conn_Exit( );
 379 #ifdef RENDEZVOUS
 380                 Rendezvous_Exit( );
 381 #endif
 382                 Client_Exit( );
 383                 Channel_Exit( );
 384                 Lists_Exit( );
 385                 Log_Exit( );
 386
 387                 Pidfile_Delete( );
 388         }
 389
 390         return 0;
 391 } /* main */
 392
 393
 394 LOCAL void
 395 Fill_Version( void )
 396 {
 397         NGIRCd_VersionAddition[0] = '\0';
 398
 399 #ifdef SYSLOG
 400         strcpy( NGIRCd_VersionAddition, "SYSLOG" );
 401 #endif
 402 #ifdef ZLIB
 403         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 404         strcat( NGIRCd_VersionAddition, "ZLIB" );
 405 #endif
 406 #ifdef TCPWRAP
 407         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 408         strcat( NGIRCd_VersionAddition, "TCPWRAP" );
 409 #endif
 410 #ifdef RENDEZVOUS
 411         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 412         strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
 413 #endif
 414 #ifdef IDENTAUTH
 415         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 416         strcat( NGIRCd_VersionAddition, "IDENT" );
 417 #endif
 418 #ifdef DEBUG
 419         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 420         strcat( NGIRCd_VersionAddition, "DEBUG" );
 421 #endif
 422 #ifdef SNIFFER
 423         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 424         strcat( NGIRCd_VersionAddition, "SNIFFER" );
 425 #endif
 426 #ifdef STRICT_RFC
 427         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 428         strcat( NGIRCd_VersionAddition, "RFC" );
 429 #endif
 430 #ifdef IRCPLUS
 431         if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
 432         strcat( NGIRCd_VersionAddition, "IRCPLUS" );
 433 #endif
 434
 435         if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
 436         strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
 437         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 438         strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
 439         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 440         strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
 441
 442 #ifdef CVSDATE
 443         snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
 444 #else
 445         snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
 446 #endif
 447 } /* Fill_Version */
 448
 449
 450 GLOBAL void
 451 NGIRCd_Rehash( void )
 452 {
 453         char old_name[CLIENT_ID_LEN];
 454
 455         Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
 456         NGIRCd_SignalRehash = false;
 457
 458         /* Close down all listening sockets */
 459         Conn_ExitListeners( );
 460
 461         /* Remember old server name */
 462         strcpy( old_name, Conf_ServerName );
 463
 464         /* Re-read configuration ... */
 465         Conf_Rehash( );
 466
 467         /* Recover old server name: it can't be changed during run-time */
 468         if( strcmp( old_name, Conf_ServerName ) != 0 )
 469         {
 470                 strcpy( Conf_ServerName, old_name );
 471                 Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
 472         }
 473
 474         /* Create new pre-defined channels */
 475         Channel_InitPredefined( );
 476
 477         /* Start listening on sockets */
 478         Conn_InitListeners( );
 479
 480         /* Sync configuration with established connections */
 481         Conn_SyncServerStruct( );
 482
 483         Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
 484 } /* NGIRCd_Rehash */
 485
 486
 487 LOCAL void
 488 Initialize_Signal_Handler( void )
 489 {
 490         /* Signal-Handler initialisieren: einige Signale
 491          * werden ignoriert, andere speziell behandelt. */
 492
 493 #ifdef HAVE_SIGACTION
 494         /* sigaction() ist vorhanden */
 495
 496         struct sigaction saction;
 497
 498         /* Signal-Struktur initialisieren */
 499         memset( &saction, 0, sizeof( saction ));
 500         saction.sa_handler = Signal_Handler;
 501 #ifdef SA_RESTART
 502         saction.sa_flags |= SA_RESTART;
 503 #endif
 504 #ifdef SA_NOCLDWAIT
 505         saction.sa_flags |= SA_NOCLDWAIT;
 506 #endif
 507
 508         /* Signal-Handler einhaengen */
 509         sigaction( SIGINT, &saction, NULL );
 510         sigaction( SIGQUIT, &saction, NULL );
 511         sigaction( SIGTERM, &saction, NULL);
 512         sigaction( SIGHUP, &saction, NULL);
 513         sigaction( SIGCHLD, &saction, NULL);
 514
 515         /* einige Signale ignorieren */
 516         saction.sa_handler = SIG_IGN;
 517         sigaction( SIGPIPE, &saction, NULL );
 518 #else
 519         /* kein sigaction() vorhanden */
 520
 521         /* Signal-Handler einhaengen */
 522         signal( SIGINT, Signal_Handler );
 523         signal( SIGQUIT, Signal_Handler );
 524         signal( SIGTERM, Signal_Handler );
 525         signal( SIGHUP, Signal_Handler );
 526         signal( SIGCHLD, Signal_Handler );
 527
 528         /* einige Signale ignorieren */
 529         signal( SIGPIPE, SIG_IGN );
 530 #endif
 531 } /* Initialize_Signal_Handler */
 532
 533
 534 LOCAL void
 535 Signal_Handler( int Signal )
 536 {
 537         /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
 538          * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
 539          * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
 540
 541         switch( Signal )
 542         {
 543                 case SIGTERM:
 544                 case SIGINT:
 545                 case SIGQUIT:
 546                         /* wir soll(t)en uns wohl beenden ... */
 547                         NGIRCd_SignalQuit = true;
 548                         break;
 549                 case SIGHUP:
 550                         /* Konfiguration neu einlesen: */
 551                         NGIRCd_SignalRehash = true;
 552                         break;
 553                 case SIGCHLD:
 554                         /* Child-Prozess wurde beendet. Zombies vermeiden: */
 555                         while( waitpid( -1, NULL, WNOHANG ) > 0);
 556                         break;
 557 #ifdef DEBUG
 558                 default:
 559                         /* unbekanntes bzw. unbehandeltes Signal */
 560                         Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
 561 #endif
 562         }
 563 } /* Signal_Handler */
 564
 565
 566 LOCAL void
 567 Show_Version( void )
 568 {
 569         puts( NGIRCd_Version );
 570         puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
 571         puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
 572         puts( "This is free software; see the source for copying conditions. There is NO" );
 573         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 574 } /* Show_Version */
 575
 576
 577 LOCAL void
 578 Show_Help( void )
 579 {
 580 #ifdef DEBUG
 581         puts( "  -d, --debug        log extra debug messages" );
 582 #endif
 583         puts( "  -f, --config <f>   use file <f> as configuration file" );
 584         puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
 585         puts( "  -p, --passive      disable automatic connections to other servers" );
 586 #ifdef SNIFFER
 587         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 588 #endif
 589         puts( "  -t, --configtest   read, validate and display configuration; then exit" );
 590         puts( "      --version      output version information and exit" );
 591         puts( "      --help         display this help and exit" );
 592 } /* Show_Help */
 593
 594
 595 LOCAL void
 596 Pidfile_Delete( void )
 597 {
 598         /* Pidfile configured? */
 599         if( ! Conf_PidFile[0] ) return;
 600
 601 #ifdef DEBUG
 602         Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
 603 #endif
 604
 605         if( unlink( Conf_PidFile ))
 606                 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
 607 } /* Pidfile_Delete */
 608
 609
 610 LOCAL void
 611 Pidfile_Create( long pid )
 612 {
 613         FILE *pidf;
 614
 615         /* Pidfile configured? */
 616         if( ! Conf_PidFile[0] ) return;
 617
 618 #ifdef DEBUG
 619         Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
 620 #endif
 621
 622         pidf = fopen( Conf_PidFile, "w" );
 623
 624         if( ! pidf )
 625         {
 626                 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 627                 return;
 628         }
 629
 630         if( fprintf( pidf, "%ld\n", pid ) < 0 )
 631                 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
 632
 633         if( fclose(pidf) != 0 )
 634                 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 635 } /* Pidfile_Create */
 636
 637
 638 LOCAL void
 639 Setup_FDStreams( void )
 640 {
 641         int fd;
 642
 643         /* Test if we can open /dev/null for reading and writing. If not
 644          * we are most probably chrooted already and the server has been
 645          * restarted. So we simply don't try to redirect stdXXX ... */
 646         fd = open( "/dev/null", O_RDWR );
 647         if ( fd < 0 ) return;
 648
 649         /* Close "old" stdin/out/err descriptors */
 650         close( 0 ); close( 1 ); close( 2 );
 651
 652         /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
 653         dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
 654
 655         /* Close newly opened file descriptor if not stdin/out/err */
 656         if( fd > 2 ) close( fd );
 657 } /* Setup_FDStreams */
 658
 659
 660 /* -eof- */