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 1.88 2005/02/04 14:24:21 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 ));
65 main( int argc, const char *argv[] )
69 BOOLEAN ok, configtest = FALSE;
75 NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE;
76 NGIRCd_NoDaemon = NGIRCd_Passive = FALSE;
81 NGIRCd_Sniffer = FALSE;
83 strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
84 strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
86 /* Kommandozeile parsen */
87 for( i = 1; i < argc; i++ )
90 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
94 if( strcmp( argv[i], "--config" ) == 0 )
98 /* Ok, there's an parameter left */
99 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
105 if( strcmp( argv[i], "--configtest" ) == 0 )
111 if( strcmp( argv[i], "--debug" ) == 0 )
117 if( strcmp( argv[i], "--help" ) == 0 )
120 puts( "" ); Show_Help( ); puts( "" );
123 if( strcmp( argv[i], "--nodaemon" ) == 0 )
125 NGIRCd_NoDaemon = TRUE;
128 if( strcmp( argv[i], "--passive" ) == 0 )
130 NGIRCd_Passive = TRUE;
134 if( strcmp( argv[i], "--sniffer" ) == 0 )
136 NGIRCd_Sniffer = TRUE;
140 if( strcmp( argv[i], "--version" ) == 0 )
146 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
150 for( n = 1; n < (LONG)strlen( argv[i] ); n++ )
154 if( argv[i][n] == 'd' )
160 if( argv[i][n] == 'f' )
162 if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
164 /* Ok, next character is a blank */
165 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
167 /* go to the following parameter */
168 i++; n = (LONG)strlen( argv[i] );
172 if( argv[i][n] == 'n' )
174 NGIRCd_NoDaemon = TRUE;
177 if( argv[i][n] == 'p' )
179 NGIRCd_Passive = TRUE;
183 if( argv[i][n] == 's' )
185 NGIRCd_Sniffer = TRUE;
189 if( argv[i][n] == 't' )
197 printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
198 printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
206 printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
207 printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
212 /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */
213 strcpy( NGIRCd_DebugLevel, "" );
215 if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
221 strcpy( NGIRCd_DebugLevel, "2" );
225 /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */
228 Show_Version( ); puts( "" );
232 while( ! NGIRCd_SignalQuit )
234 /* Initialize global variables */
235 NGIRCd_Start = time( NULL );
236 (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
238 NGIRCd_SignalRehash = FALSE;
239 NGIRCd_SignalRestart = FALSE;
240 NGIRCd_SignalQuit = FALSE;
242 /* Initialize modules, part I */
249 if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
251 if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
252 else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
257 /* Set new group ID */
258 if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
262 /* Set new user ID */
263 if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
266 /* In der Regel wird ein Sub-Prozess ge-fork()'t, der
267 * nicht mehr mit dem Terminal verbunden ist. Mit der
268 * Option "--nodaemon" kann dies (z.B. zum Debuggen)
269 * verhindert werden. */
270 if( ! NGIRCd_NoDaemon )
272 /* Daemon im Hintergrund erzeugen */
276 /* "alter" Prozess */
282 printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
286 /* Child-Prozess initialisieren */
291 /* Create PID file */
292 pid = (LONG) getpid( );
293 Pidfile_Create( pid );
295 /* Show user, group, and PID of the running daemon */
296 pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
297 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);
299 /* Change working directory to home directory of the user
300 * we are running as (when not running chroot()'ed!) */
301 if( Conf_UID != 0 && ! Conf_Chroot[0] )
305 pwd = getpwuid( Conf_UID );
308 if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
309 else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
311 else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
314 /* Initialize modules, part II: these functions are eventually
315 * called with already dropped privileges ... */
325 /* Redirect stderr handle to "error file" for debugging.
326 * But don't try to write in the chroot jail, since it's more
327 * secure to have a chroot dir not writable by the daemon.
329 if( ! Conf_Chroot[0] ) Log_InitErrorfile( );
331 /* Signal-Handler initialisieren */
332 Initialize_Signal_Handler( );
334 /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd
335 * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
336 * sind in doc/Protocol.txt beschrieben. */
338 sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
340 strcat( NGIRCd_ProtoID, "Z" );
342 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
344 sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
346 strcat( NGIRCd_ProtoID, " P" );
348 strcat( NGIRCd_ProtoID, "Z" );
350 Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
352 /* Vordefinierte Channels anlegen */
353 Channel_InitPredefined( );
355 /* Listen-Ports initialisieren */
356 if( Conn_InitListeners( ) < 1 )
358 Log( LOG_ALERT, "Server isn't listening on a single port!" );
359 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
385 NGIRCd_Version( VOID )
387 STATIC CHAR version[126];
390 sprintf( version, "%s %s(%s)-%s", PACKAGE_NAME, PACKAGE_VERSION, CVSDATE, NGIRCd_VersionAddition( ));
392 sprintf( version, "%s %s-%s", PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition( ));
395 } /* NGIRCd_Version */
399 NGIRCd_VersionAddition( VOID )
401 STATIC CHAR txt[200];
406 if( txt[0] ) strcat( txt, "+" );
407 strcat( txt, "SYSLOG" );
410 if( txt[0] ) strcat( txt, "+" );
411 strcat( txt, "ZLIB" );
414 if( txt[0] ) strcat( txt, "+" );
415 strcat( txt, "TCPWRAP" );
418 if( txt[0] ) strcat( txt, "+" );
419 strcat( txt, "RENDEZVOUS" );
422 if( txt[0] ) strcat( txt, "+" );
423 strcat( txt, "IDENT" );
426 if( txt[0] ) strcat( txt, "+" );
427 strcat( txt, "DEBUG" );
430 if( txt[0] ) strcat( txt, "+" );
431 strcat( txt, "SNIFFER" );
434 if( txt[0] ) strcat( txt, "+" );
435 strcat( txt, "RFC" );
438 if( txt[0] ) strcat( txt, "+" );
439 strcat( txt, "IRCPLUS" );
442 if( txt[0] ) strlcat( txt, "-", sizeof( txt ));
443 strlcat( txt, TARGET_CPU, sizeof( txt ));
444 strlcat( txt, "/", sizeof( txt ));
445 strlcat( txt, TARGET_VENDOR, sizeof( txt ));
446 strlcat( txt, "/", sizeof( txt ));
447 strlcat( txt, TARGET_OS, sizeof( txt ));
450 } /* NGIRCd_VersionAddition */
454 NGIRCd_Rehash( VOID )
456 CHAR old_name[CLIENT_ID_LEN];
458 Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
459 NGIRCd_SignalRehash = FALSE;
461 /* Close down all listening sockets */
462 Conn_ExitListeners( );
464 /* Remember old server name */
465 strcpy( old_name, Conf_ServerName );
467 /* Re-read configuration ... */
470 /* Recover old server name: it can't be changed during run-time */
471 if( strcmp( old_name, Conf_ServerName ) != 0 )
473 strcpy( Conf_ServerName, old_name );
474 Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." );
477 /* Create new pre-defined channels */
478 Channel_InitPredefined( );
480 /* Start listening on sockets */
481 Conn_InitListeners( );
483 /* Sync configuration with established connections */
484 Conn_SyncServerStruct( );
486 Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
487 } /* NGIRCd_Rehash */
491 Initialize_Signal_Handler( VOID )
493 /* Signal-Handler initialisieren: einige Signale
494 * werden ignoriert, andere speziell behandelt. */
496 #ifdef HAVE_SIGACTION
497 /* sigaction() ist vorhanden */
499 struct sigaction saction;
501 /* Signal-Struktur initialisieren */
502 memset( &saction, 0, sizeof( saction ));
503 saction.sa_handler = Signal_Handler;
505 saction.sa_flags |= SA_RESTART;
508 saction.sa_flags |= SA_NOCLDWAIT;
511 /* Signal-Handler einhaengen */
512 sigaction( SIGINT, &saction, NULL );
513 sigaction( SIGQUIT, &saction, NULL );
514 sigaction( SIGTERM, &saction, NULL);
515 sigaction( SIGHUP, &saction, NULL);
516 sigaction( SIGCHLD, &saction, NULL);
518 /* einige Signale ignorieren */
519 saction.sa_handler = SIG_IGN;
520 sigaction( SIGPIPE, &saction, NULL );
522 /* kein sigaction() vorhanden */
524 /* Signal-Handler einhaengen */
525 signal( SIGINT, Signal_Handler );
526 signal( SIGQUIT, Signal_Handler );
527 signal( SIGTERM, Signal_Handler );
528 signal( SIGHUP, Signal_Handler );
529 signal( SIGCHLD, Signal_Handler );
531 /* einige Signale ignorieren */
532 signal( SIGPIPE, SIG_IGN );
534 } /* Initialize_Signal_Handler */
538 Signal_Handler( INT Signal )
540 /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft,
541 * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die
542 * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */
549 /* wir soll(t)en uns wohl beenden ... */
550 NGIRCd_SignalQuit = TRUE;
553 /* Konfiguration neu einlesen: */
554 NGIRCd_SignalRehash = TRUE;
557 /* Child-Prozess wurde beendet. Zombies vermeiden: */
558 while( waitpid( -1, NULL, WNOHANG ) > 0);
562 /* unbekanntes bzw. unbehandeltes Signal */
563 Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal );
566 } /* Signal_Handler */
572 puts( NGIRCd_Version( ));
573 puts( "Copyright (c)2001-2005 by Alexander Barton (<alex@barton.de>)." );
574 puts( "Homepage: <http://arthur.ath.cx/~alex/ngircd/>\n" );
575 puts( "This is free software; see the source for copying conditions. There is NO" );
576 puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
584 puts( " -d, --debug log extra debug messages" );
586 puts( " -f, --config <f> use file <f> as configuration file" );
587 puts( " -n, --nodaemon don't fork and don't detach from controlling terminal" );
588 puts( " -p, --passive disable automatic connections to other servers" );
590 puts( " -s, --sniffer enable network sniffer and display all IRC traffic" );
592 puts( " -t, --configtest read, validate and display configuration; then exit" );
593 puts( " --version output version information and exit" );
594 puts( " --help display this help and exit" );
599 Pidfile_Delete( VOID )
601 /* Pidfile configured? */
602 if( ! Conf_PidFile[0] ) return;
605 Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
608 if( unlink( Conf_PidFile ))
609 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
610 } /* Pidfile_Delete */
614 Pidfile_Create( LONG pid )
618 /* Pidfile configured? */
619 if( ! Conf_PidFile[0] ) return;
621 pidf = fopen( Conf_PidFile, "w" );
624 Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
629 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
633 if( fprintf( pidf, "%ld\n", pid ) < 0 )
634 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
636 if( fclose(pidf) != 0 )
637 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
638 } /* Pidfile_Create */