2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2005 by Alexander Barton (alex@barton.de)
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.
11 * Main program -- main()
17 static char UNUSED id[] = "$Id: ngircd.c,v 1.90 2005/02/09 09:52:58 alex Exp $";
28 #include <sys/types.h>
40 #include "cvs-version.h"
47 #include "rendezvous.h"
54 LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID ));
55 LOCAL VOID Signal_Handler PARAMS(( INT Signal ));
57 LOCAL VOID Show_Version PARAMS(( VOID ));
58 LOCAL VOID Show_Help PARAMS(( VOID ));
60 LOCAL VOID Pidfile_Create PARAMS(( LONG ));
61 LOCAL VOID Pidfile_Delete PARAMS(( VOID ));
63 LOCAL VOID NGIRCd_FillVersion PARAMS(( VOID ));
67 main( int argc, const char *argv[] )
71 BOOLEAN ok, configtest = FALSE;
77 NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE;
78 NGIRCd_NoDaemon = NGIRCd_Passive = FALSE;
83 NGIRCd_Sniffer = FALSE;
85 strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
86 strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
88 NGIRCd_FillVersion( );
90 /* Kommandozeile parsen */
91 for( i = 1; i < argc; i++ )
94 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
98 if( strcmp( argv[i], "--config" ) == 0 )
102 /* Ok, there's an parameter left */
103 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
109 if( strcmp( argv[i], "--configtest" ) == 0 )
115 if( strcmp( argv[i], "--debug" ) == 0 )
121 if( strcmp( argv[i], "--help" ) == 0 )
124 puts( "" ); Show_Help( ); puts( "" );
127 if( strcmp( argv[i], "--nodaemon" ) == 0 )
129 NGIRCd_NoDaemon = TRUE;
132 if( strcmp( argv[i], "--passive" ) == 0 )
134 NGIRCd_Passive = TRUE;
138 if( strcmp( argv[i], "--sniffer" ) == 0 )
140 NGIRCd_Sniffer = TRUE;
144 if( strcmp( argv[i], "--version" ) == 0 )
150 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
154 for( n = 1; n < (LONG)strlen( argv[i] ); n++ )
158 if( argv[i][n] == 'd' )
164 if( argv[i][n] == 'f' )
166 if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
168 /* Ok, next character is a blank */
169 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
171 /* go to the following parameter */
172 i++; n = (LONG)strlen( argv[i] );
176 if( argv[i][n] == 'n' )
178 NGIRCd_NoDaemon = TRUE;
181 if( argv[i][n] == 'p' )
183 NGIRCd_Passive = TRUE;
187 if( argv[i][n] == 's' )
189 NGIRCd_Sniffer = TRUE;
193 if( argv[i][n] == 't' )
201 printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
202 printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
210 printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
211 printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
216 /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
217 NGIRCd_DebugLevel[0] = '\0';
219 if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
225 strcpy( NGIRCd_DebugLevel, "2" );
229 /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
232 Show_Version( ); puts( "" );
236 while( ! NGIRCd_SignalQuit )
238 /* Initialize global variables */
239 NGIRCd_Start = time( NULL );
240 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
242 NGIRCd_SignalRehash = FALSE;
243 NGIRCd_SignalRestart = FALSE;
244 NGIRCd_SignalQuit = FALSE;
246 /* Initialize modules, part I */
253 if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
255 if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
256 else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
261 /* Set new group ID */
262 if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
266 /* Set new user ID */
267 if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
270 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
271 * nicht mehr mit dem Terminal verbunden ist. Mit der
272 * Option "--nodaemon" kann dies (z.B. zum Debuggen)
273 * verhindert werden. */
274 if( ! NGIRCd_NoDaemon )
276 /* Daemon im Hintergrund erzeugen */
280 /* "alter" Prozess */
286 printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
290 /* Child-Prozess initialisieren */
295 /* Create PID file */
296 pid = (LONG) getpid( );
297 Pidfile_Create( pid );
299 /* Show user, group, and PID of the running daemon */
300 pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
301 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);
303 /* Change working directory to home directory of the user
304 * we are running as (when not running chroot()'ed!) */
305 if( Conf_UID != 0 && ! Conf_Chroot[0] )
309 pwd = getpwuid( Conf_UID );
312 if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
313 else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
315 else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
318 /* Initialize modules, part II: these functions are eventually
319 * called with already dropped privileges ... */
329 /* Redirect stderr handle to "error file" for debugging.
330 * But don't try to write in the chroot jail, since it's more
331 * secure to have a chroot dir not writable by the daemon.
333 if( ! Conf_Chroot[0] ) Log_InitErrorfile( );
335 /* Signal-Handler initialisieren */
336 Initialize_Signal_Handler( );
338 /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
339 * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
340 * sind in doc/Protocol.txt beschrieben. */
342 sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
344 strcat( NGIRCd_ProtoID, "Z" );
346 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
348 sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
350 strcat( NGIRCd_ProtoID, " P" );
352 strcat( NGIRCd_ProtoID, "Z" );
354 Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
356 /* Vordefinierte Channels anlegen */
357 Channel_InitPredefined( );
359 /* Listen-Ports initialisieren */
360 if( Conn_InitListeners( ) < 1 )
362 Log( LOG_ALERT, "Server isn't listening on a single port!" );
363 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
389 NGIRCd_FillVersion( VOID )
391 NGIRCd_VersionAddition[0] = '\0';
394 strcpy( NGIRCd_VersionAddition, "SYSLOG" );
397 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
398 strcat( NGIRCd_VersionAddition, "ZLIB" );
401 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
402 strcat( NGIRCd_VersionAddition, "TCPWRAP" );
405 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
406 strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
409 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
410 strcat( NGIRCd_VersionAddition, "IDENT" );
413 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
414 strcat( NGIRCd_VersionAddition, "DEBUG" );
417 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
418 strcat( NGIRCd_VersionAddition, "SNIFFER" );
421 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
422 strcat( NGIRCd_VersionAddition, "RFC" );
425 if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
426 strcat( NGIRCd_VersionAddition, "IRCPLUS" );
429 if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
430 strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
431 strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
432 strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
433 strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
434 strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
437 snprintf( NGIRCd_Version, sizeof NGIRCd_Version,"%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition);
439 snprintf( NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
441 } /* NGIRCd_FillVersion */
445 NGIRCd_Rehash( VOID )
447 CHAR old_name[CLIENT_ID_LEN];
449 Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
450 NGIRCd_SignalRehash = FALSE;
452 /* Close down all listening sockets */
453 Conn_ExitListeners( );
455 /* Remember old server name */
456 strcpy( old_name, Conf_ServerName );
458 /* Re-read configuration ... */
461 /* Recover old server name: it can't be changed during run-time */
462 if( strcmp( old_name, Conf_ServerName ) != 0 )
464 strcpy( Conf_ServerName, old_name );
465 Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
468 /* Create new pre-defined channels */
469 Channel_InitPredefined( );
471 /* Start listening on sockets */
472 Conn_InitListeners( );
474 /* Sync configuration with established connections */
475 Conn_SyncServerStruct( );
477 Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
478 } /* NGIRCd_Rehash */
482 Initialize_Signal_Handler( VOID )
484 /* Signal-Handler initialisieren: einige Signale
485 * werden ignoriert, andere speziell behandelt. */
487 #ifdef HAVE_SIGACTION
488 /* sigaction() ist vorhanden */
490 struct sigaction saction;
492 /* Signal-Struktur initialisieren */
493 memset( &saction, 0, sizeof( saction ));
494 saction.sa_handler = Signal_Handler;
496 saction.sa_flags |= SA_RESTART;
499 saction.sa_flags |= SA_NOCLDWAIT;
502 /* Signal-Handler einhaengen */
503 sigaction( SIGINT, &saction, NULL );
504 sigaction( SIGQUIT, &saction, NULL );
505 sigaction( SIGTERM, &saction, NULL);
506 sigaction( SIGHUP, &saction, NULL);
507 sigaction( SIGCHLD, &saction, NULL);
509 /* einige Signale ignorieren */
510 saction.sa_handler = SIG_IGN;
511 sigaction( SIGPIPE, &saction, NULL );
513 /* kein sigaction() vorhanden */
515 /* Signal-Handler einhaengen */
516 signal( SIGINT, Signal_Handler );
517 signal( SIGQUIT, Signal_Handler );
518 signal( SIGTERM, Signal_Handler );
519 signal( SIGHUP, Signal_Handler );
520 signal( SIGCHLD, Signal_Handler );
522 /* einige Signale ignorieren */
523 signal( SIGPIPE, SIG_IGN );
525 } /* Initialize_Signal_Handler */
529 Signal_Handler( INT Signal )
531 /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
532 * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
533 * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
540 /* wir soll(t)en uns wohl beenden ... */
541 NGIRCd_SignalQuit = TRUE;
544 /* Konfiguration neu einlesen: */
545 NGIRCd_SignalRehash = TRUE;
548 /* Child-Prozess wurde beendet. Zombies vermeiden: */
549 while( waitpid( -1, NULL, WNOHANG ) > 0);
553 /* unbekanntes bzw. unbehandeltes Signal */
554 Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
557 } /* Signal_Handler */
563 puts( NGIRCd_Version );
564 puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
565 puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
566 puts( "This is free software; see the source for copying conditions. There is NO" );
567 puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
575 puts( " -d, --debug log extra debug messages" );
577 puts( " -f, --config <f> use file <f> as configuration file" );
578 puts( " -n, --nodaemon don't fork and don't detach from controlling terminal" );
579 puts( " -p, --passive disable automatic connections to other servers" );
581 puts( " -s, --sniffer enable network sniffer and display all IRC traffic" );
583 puts( " -t, --configtest read, validate and display configuration; then exit" );
584 puts( " --version output version information and exit" );
585 puts( " --help display this help and exit" );
590 Pidfile_Delete( VOID )
592 /* Pidfile configured? */
593 if( ! Conf_PidFile[0] ) return;
596 Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
599 if( unlink( Conf_PidFile ))
600 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
601 } /* Pidfile_Delete */
605 Pidfile_Create( LONG pid )
609 /* Pidfile configured? */
610 if( ! Conf_PidFile[0] ) return;
613 Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
616 pidf = fopen( Conf_PidFile, "w" );
620 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
624 if( fprintf( pidf, "%ld\n", pid ) < 0 )
625 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
627 if( fclose(pidf) != 0 )
628 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
629 } /* Pidfile_Create */