Update copyright notices for 2010 :)
[ngircd-alex.git] / src / ngircd / ngircd.c
1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors.
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 /**
16  * @file
17  * The main program, including the C function main() which is called
18  * by the loader of the operating system.
19  */
20
21 #include "imp.h"
22 #include <assert.h>
23 #include <errno.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <signal.h>
27 #include <string.h>
28 #include <unistd.h>
29 #include <time.h>
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <fcntl.h>
33 #include <pwd.h>
34 #include <grp.h>
35
36 #if defined(DEBUG) && defined(HAVE_MTRACE)
37 #include <mcheck.h>
38 #endif
39
40 #include "defines.h"
41 #include "conn.h"
42 #include "conf-ssl.h"
43 #include "channel.h"
44 #include "conf.h"
45 #include "lists.h"
46 #include "log.h"
47 #include "parse.h"
48 #include "sighandlers.h"
49 #include "io.h"
50 #include "irc.h"
51
52 #ifdef ZEROCONF
53 #include "rendezvous.h"
54 #endif
55
56 #include "exp.h"
57 #include "ngircd.h"
58
59
60 static void Show_Version PARAMS(( void ));
61 static void Show_Help PARAMS(( void ));
62
63 static void Pidfile_Create PARAMS(( pid_t pid ));
64 static void Pidfile_Delete PARAMS(( void ));
65
66 static void Fill_Version PARAMS(( void ));
67
68 static void Setup_FDStreams PARAMS(( int fd ));
69
70 static bool NGIRCd_Init PARAMS(( bool ));
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         bool ok, configtest = false;
85         bool NGIRCd_NoDaemon = false;
86         int i;
87         size_t n;
88
89 #if defined(DEBUG) && defined(HAVE_MTRACE)
90         /* enable GNU libc memory tracing when running in debug mode
91          * and functionality available */
92         mtrace();
93 #endif
94
95         umask( 0077 );
96
97         NGIRCd_SignalQuit = NGIRCd_SignalRestart = false;
98         NGIRCd_Passive = false;
99 #ifdef DEBUG
100         NGIRCd_Debug = false;
101 #endif
102 #ifdef SNIFFER
103         NGIRCd_Sniffer = false;
104 #endif
105         strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
106         strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
107
108         Fill_Version( );
109
110         /* parse conmmand line */
111         for( i = 1; i < argc; i++ )
112         {
113                 ok = false;
114                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
115                 {
116                         /* long option */
117                         if( strcmp( argv[i], "--config" ) == 0 )
118                         {
119                                 if( i + 1 < argc )
120                                 {
121                                         /* Ok, there's an parameter left */
122                                         strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
123
124                                         /* next parameter */
125                                         i++; ok = true;
126                                 }
127                         }
128                         if( strcmp( argv[i], "--configtest" ) == 0 )
129                         {
130                                 configtest = true;
131                                 ok = true;
132                         }
133 #ifdef DEBUG
134                         if( strcmp( argv[i], "--debug" ) == 0 )
135                         {
136                                 NGIRCd_Debug = true;
137                                 ok = true;
138                         }
139 #endif
140                         if( strcmp( argv[i], "--help" ) == 0 )
141                         {
142                                 Show_Version( );
143                                 puts( "" ); Show_Help( ); puts( "" );
144                                 exit( 1 );
145                         }
146                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
147                         {
148                                 NGIRCd_NoDaemon = true;
149                                 ok = true;
150                         }
151                         if( strcmp( argv[i], "--passive" ) == 0 )
152                         {
153                                 NGIRCd_Passive = true;
154                                 ok = true;
155                         }
156 #ifdef SNIFFER
157                         if( strcmp( argv[i], "--sniffer" ) == 0 )
158                         {
159                                 NGIRCd_Sniffer = true;
160                                 ok = true;
161                         }
162 #endif
163                         if( strcmp( argv[i], "--version" ) == 0 )
164                         {
165                                 Show_Version( );
166                                 exit( 1 );
167                         }
168                 }
169                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
170                 {
171                         /* short option */
172                         for( n = 1; n < strlen( argv[i] ); n++ )
173                         {
174                                 ok = false;
175 #ifdef DEBUG
176                                 if (argv[i][n] == 'd') {
177                                         NGIRCd_Debug = true;
178                                         ok = true;
179                                 }
180 #endif
181                                 if (argv[i][n] == 'f') {
182                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
183                                         {
184                                                 /* Ok, next character is a blank */
185                                                 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
186
187                                                 /* go to the following parameter */
188                                                 i++;
189                                                 n = strlen( argv[i] );
190                                                 ok = true;
191                                         }
192                                 }
193
194                                 if (argv[i][n] == 'h') {
195                                         Show_Version();
196                                         puts(""); Show_Help(); puts("");
197                                         exit(1);
198                                 }
199
200                                 if (argv[i][n] == 'n') {
201                                         NGIRCd_NoDaemon = true;
202                                         ok = true;
203                                 }
204                                 if (argv[i][n] == 'p') {
205                                         NGIRCd_Passive = true;
206                                         ok = true;
207                                 }
208 #ifdef SNIFFER
209                                 if (argv[i][n] == 's') {
210                                         NGIRCd_Sniffer = true;
211                                         ok = true;
212                                 }
213 #endif
214                                 if (argv[i][n] == 't') {
215                                         configtest = true;
216                                         ok = true;
217                                 }
218
219                                 if (argv[i][n] == 'V') {
220                                         Show_Version();
221                                         exit(1);
222                                 }
223
224                                 if (! ok) {
225                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
226                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
227                                         exit( 1 );
228                                 }
229                         }
230
231                 }
232                 if( ! ok )
233                 {
234                         printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
235                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
236                         exit( 1 );
237                 }
238         }
239
240         /* Debug-Level (for IRCs "VERSION" command) */
241         NGIRCd_DebugLevel[0] = '\0';
242 #ifdef DEBUG
243         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
244 #endif
245 #ifdef SNIFFER
246         if( NGIRCd_Sniffer )
247         {
248                 NGIRCd_Debug = true;
249                 strcpy( NGIRCd_DebugLevel, "2" );
250         }
251 #endif
252
253         if( configtest )
254         {
255                 Show_Version( ); puts( "" );
256                 exit( Conf_Test( ));
257         }
258         
259         while( ! NGIRCd_SignalQuit )
260         {
261                 /* Initialize global variables */
262                 NGIRCd_Start = time( NULL );
263                 (void)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
264
265                 NGIRCd_SignalRestart = false;
266                 NGIRCd_SignalQuit = false;
267
268                 /* Initialize modules, part I */
269                 Log_Init( ! NGIRCd_NoDaemon );
270                 Conf_Init( );
271
272                 /* Initialize the "main program": chroot environment, user and
273                  * group ID, ... */
274                 if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
275                         Log(LOG_ALERT, "Fatal: Initialization failed");
276                         exit(1);
277                 }
278
279                 /* Initialize modules, part II: these functions are eventually
280                  * called with already dropped privileges ... */
281                 Channel_Init( );
282                 Client_Init( );
283 #ifdef ZEROCONF
284                 Rendezvous_Init( );
285 #endif
286                 Conn_Init( );
287
288                 if (!io_library_init(CONNECTION_POOL)) {
289                         Log(LOG_ALERT, "Fatal: Cannot initialize IO routines: %s", strerror(errno));
290                         exit(1);
291                 }
292
293                 if (!Signals_Init()) {
294                         Log(LOG_ALERT, "Fatal: Could not set up signal handlers: %s", strerror(errno));
295                         exit(1);
296                 }
297
298                 /*
299                  * create protocol and server identification.
300                  * The syntax used by ngIRCd in PASS commands and the extended flags
301                  * are described in doc/Protocol.txt
302                  */
303 #ifdef IRCPLUS
304                 snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
305 #ifdef ZLIB
306                 strcat( NGIRCd_ProtoID, "Z" );
307 #endif
308                 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
309 #else
310                 snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
311 #endif
312                 strlcat( NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID );
313 #ifdef ZLIB
314                 strlcat( NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID );
315 #endif
316                 LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID);
317
318                 Channel_InitPredefined( );
319
320                 if( Conn_InitListeners( ) < 1 )
321                 {
322                         Log( LOG_ALERT, "Server isn't listening on a single port!" );
323                         Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
324                         Pidfile_Delete( );
325                         exit( 1 );
326                 }
327                 
328                 /* Hauptschleife */
329                 Conn_Handler( );
330
331                 /* Alles abmelden */
332                 Conn_Exit( );
333 #ifdef ZEROCONF
334                 Rendezvous_Exit( );
335 #endif
336                 Client_Exit( );
337                 Channel_Exit( );
338                 Log_Exit( );
339         }
340         Pidfile_Delete( );
341
342         return 0;
343 } /* main */
344
345
346 /**
347  * Generate ngIRCd "version string".
348  * This string is generated once and then stored in NGIRCd_Version for
349  * further usage, for example by the IRC command VERSION and the --version
350  * command line switch.
351  */
352 static void
353 Fill_Version( void )
354 {
355         NGIRCd_VersionAddition[0] = '\0';
356
357 #ifdef SYSLOG
358         strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
359 #endif
360 #ifdef ZLIB
361         if( NGIRCd_VersionAddition[0] )
362                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
363         strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
364 #endif
365 #ifdef SSL_SUPPORT
366         if ( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
367         strlcat( NGIRCd_VersionAddition, "SSL", sizeof NGIRCd_VersionAddition );
368 #endif
369 #ifdef TCPWRAP
370         if( NGIRCd_VersionAddition[0] )
371                         strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
372         strlcat( NGIRCd_VersionAddition, "TCPWRAP", sizeof NGIRCd_VersionAddition );
373 #endif
374 #ifdef ZEROCONF
375         if( NGIRCd_VersionAddition[0] )
376                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
377         strlcat( NGIRCd_VersionAddition, "ZEROCONF", sizeof NGIRCd_VersionAddition );
378 #endif
379 #ifdef IDENTAUTH
380         if( NGIRCd_VersionAddition[0] )
381                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
382         strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
383 #endif
384 #ifdef PAM
385         if (NGIRCd_VersionAddition[0])
386                 strlcat(NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition);
387         strlcat(NGIRCd_VersionAddition, "PAM", sizeof NGIRCd_VersionAddition);
388 #endif
389 #ifdef DEBUG
390         if( NGIRCd_VersionAddition[0] )
391                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
392         strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
393 #endif
394 #ifdef SNIFFER
395         if( NGIRCd_VersionAddition[0] )
396                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
397         strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
398 #endif
399 #ifdef STRICT_RFC
400         if( NGIRCd_VersionAddition[0] )
401                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
402         strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
403 #endif
404 #ifdef IRCPLUS
405         if( NGIRCd_VersionAddition[0] )
406                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
407         strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
408 #endif
409 #ifdef WANT_IPV6
410         if (NGIRCd_VersionAddition[0])
411                 strlcat(NGIRCd_VersionAddition, "+", sizeof(NGIRCd_VersionAddition));
412         strlcat(NGIRCd_VersionAddition, "IPv6", sizeof(NGIRCd_VersionAddition));
413 #endif
414         if( NGIRCd_VersionAddition[0] )
415                 strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
416
417         strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
418         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
419         strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
420         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
421         strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
422
423         snprintf(NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s",
424                  PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
425         } /* Fill_Version */
426
427
428 /**
429  * Display copyright and version information of ngIRCd on the console.
430  */
431 static void
432 Show_Version( void )
433 {
434         puts( NGIRCd_Version );
435         puts( "Copyright (c)2001-2011 Alexander Barton (<alex@barton.de>) and Contributors." );
436         puts( "Homepage: <http://ngircd.barton.de/>\n" );
437         puts( "This is free software; see the source for copying conditions. There is NO" );
438         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
439 } /* Show_Version */
440
441
442 /**
443  * Display a short help text on the console.
444  * This help depends on the configuration of the executable and only shows
445  * options that are actually enabled.
446  */
447 static void
448 Show_Help( void )
449 {
450 #ifdef DEBUG
451         puts( "  -d, --debug        log extra debug messages" );
452 #endif
453         puts( "  -f, --config <f>   use file <f> as configuration file" );
454         puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
455         puts( "  -p, --passive      disable automatic connections to other servers" );
456 #ifdef SNIFFER
457         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
458 #endif
459         puts( "  -t, --configtest   read, validate and display configuration; then exit" );
460         puts( "  -V, --version      output version information and exit" );
461         puts( "  -h, --help         display this help and exit" );
462 } /* Show_Help */
463
464
465 /**
466  * Delete the file containing the process ID (PID).
467  */
468 static void
469 Pidfile_Delete( void )
470 {
471         /* Pidfile configured? */
472         if( ! Conf_PidFile[0] ) return;
473
474 #ifdef DEBUG
475         Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
476 #endif
477
478         if( unlink( Conf_PidFile ))
479                 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
480 } /* Pidfile_Delete */
481
482
483 /**
484  * Create the file containing the process ID of ngIRCd ("PID file").
485  * @param pid The process ID to be stored in this file.
486  */
487 static void
488 Pidfile_Create(pid_t pid)
489 {
490         int pidfd;
491         char pidbuf[64];
492         int len;
493
494         /* Pidfile configured? */
495         if( ! Conf_PidFile[0] ) return;
496
497 #ifdef DEBUG
498         Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
499 #endif
500
501         pidfd = open( Conf_PidFile, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
502         if ( pidfd < 0 ) {
503                 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
504                 return;
505         }
506
507         len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
508         if (len < 0 || len >= (int)sizeof pidbuf) {
509                 Log( LOG_ERR, "Error converting pid");
510                 return;
511         }
512         
513         if (write(pidfd, pidbuf, (size_t)len) != (ssize_t)len)
514                 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
515
516         if( close(pidfd) != 0 )
517                 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
518 } /* Pidfile_Create */
519
520
521 /**
522  * Redirect stdin, stdout and stderr to apropriate file handles.
523  */
524 static void
525 Setup_FDStreams(int fd)
526 {
527         if (fd < 0)
528                 return;
529
530         fflush(stdout);
531         fflush(stderr);
532
533         /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
534         dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
535 } /* Setup_FDStreams */
536
537
538 static bool
539 NGIRCd_getNobodyID(uid_t *uid, gid_t *gid )
540 {
541         struct passwd *pwd;
542
543 #ifdef __CYGWIN__
544         /* Cygwin kludge.
545          * It can return EINVAL instead of EPERM
546          * so, if we are already unprivileged,
547          * use id of current user.
548          */
549         if (geteuid() && getuid()) {
550                 *uid = getuid();
551                 *gid = getgid();
552                 return true;
553         }
554 #endif
555
556         pwd = getpwnam("nobody");
557         if (!pwd) return false;
558
559         if ( !pwd->pw_uid || !pwd->pw_gid)
560                 return false;
561
562         *uid = pwd->pw_uid;     
563         *gid = pwd->pw_gid;
564         endpwent();
565
566         return true;    
567 }
568
569
570 static bool
571 NGIRCd_Init( bool NGIRCd_NoDaemon ) 
572 {
573         static bool initialized;
574         bool chrooted = false;
575         struct passwd *pwd;
576         struct group *grp;
577         int real_errno, fd = -1;
578         pid_t pid;
579
580         if (initialized)
581                 return true;
582
583         if (!NGIRCd_NoDaemon) {
584                 /* open /dev/null before chroot() */
585                 fd = open( "/dev/null", O_RDWR);
586                 if (fd < 0)
587                         Log(LOG_WARNING, "Could not open /dev/null: %s", strerror(errno));
588         }
589
590         if (!ConnSSL_InitLibrary())
591                 Log(LOG_WARNING,
592                     "Warning: Error during SSL initialization, continuing ...");
593
594         if( Conf_Chroot[0] ) {
595                 if( chdir( Conf_Chroot ) != 0 ) {
596                         Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
597                         goto out;
598                 }
599
600                 if( chroot( Conf_Chroot ) != 0 ) {
601                         if (errno != EPERM) {
602                                 Log( LOG_ERR, "Can't change root directory to \"%s\": %s",
603                                                                 Conf_Chroot, strerror( errno ));
604                                 goto out;
605                         }
606                 } else {
607                         chrooted = true;
608                         Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
609                 }
610         }
611
612         if (Conf_UID == 0) {
613                 Log(LOG_INFO, "ServerUID must not be 0, using \"nobody\" instead.", Conf_UID);
614
615                 if (! NGIRCd_getNobodyID(&Conf_UID, &Conf_GID)) {
616                         Log(LOG_WARNING, "Could not get user/group ID of user \"nobody\": %s",
617                                         errno ? strerror(errno) : "not found" );
618                         goto out;
619                 }
620         }
621
622         if (getgid() != Conf_GID) {
623                 /* Change group ID */
624                 if (setgid(Conf_GID) != 0) {
625                         real_errno = errno;
626                         Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
627                         if (real_errno != EPERM) 
628                                 goto out;
629                 }
630         }
631
632         if (getuid() != Conf_UID) {
633                 /* Change user ID */
634                 if (setuid(Conf_UID) != 0) {
635                         real_errno = errno;
636                         Log(LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror(errno));
637                         if (real_errno != EPERM) 
638                                 goto out;
639                 }
640         }
641
642         initialized = true;
643
644         /* Normally a child process is forked which isn't any longer
645          * connected to ther controlling terminal. Use "--nodaemon"
646          * to disable this "daemon mode" (useful for debugging). */
647         if ( ! NGIRCd_NoDaemon ) {
648                 pid = fork( );
649                 if( pid > 0 ) {
650                         /* "Old" process: exit. */
651                         exit( 0 );
652                 }
653                 if( pid < 0 ) {
654                         /* Error!? */
655                         fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
656                                                                 PACKAGE_NAME, strerror( errno ));
657                         exit( 1 );
658                 }
659
660                 /* New child process */
661 #ifndef NeXT
662                 (void)setsid( );
663 #else
664                 setpgrp(0, getpid());
665 #endif
666                 if (chdir( "/" ) != 0)
667                         Log(LOG_ERR, "Can't change directory to '/': %s",
668                                      strerror(errno));
669
670                 /* Detach stdin, stdout and stderr */
671                 Setup_FDStreams(fd);
672                 if (fd > 2) {
673                         close(fd);
674                         fd = -1;
675                 }
676         }
677         pid = getpid();
678
679         Pidfile_Create( pid );
680
681         /* Check UID/GID we are running as, can be different from values
682          * configured (e. g. if we were already started with a UID>0. */
683         Conf_UID = getuid();
684         Conf_GID = getgid();
685
686         pwd = getpwuid( Conf_UID );
687         grp = getgrgid( Conf_GID );
688
689         Log(LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
690                                 pwd ? pwd->pw_name : "unknown", (long)Conf_UID,
691                                 grp ? grp->gr_name : "unknown", (long)Conf_GID, (long)pid);
692
693         if (chrooted) {
694                 Log(LOG_INFO, "Running with root directory \"%s\".",
695                     Conf_Chroot );
696                 return true;
697         } else
698                 Log(LOG_INFO, "Not running with changed root directory.");
699
700         /* Change working directory to home directory of the user
701          * we are running as (only when running in daemon mode and not in chroot) */
702
703         if (pwd) {
704                 if (!NGIRCd_NoDaemon ) {
705                         if( chdir( pwd->pw_dir ) == 0 ) 
706                                 Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
707                         else 
708                                 Log( LOG_INFO, "Notice: Can't change working directory to \"%s\": %s",
709                                                                 pwd->pw_dir, strerror( errno ));
710                 }
711         } else {
712                 Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
713         }
714
715         return true;
716  out:
717         if (fd > 2)
718                 close(fd);
719         return false;
720 }
721
722
723 /* -eof- */