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 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * The main program, including the C function main() which is called
  17  * by the loader of the operating system.
  18  */
  19
  20 #include "imp.h"
  21 #include <assert.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <signal.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <time.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <fcntl.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34
  35 #if defined(DEBUG) && defined(HAVE_MTRACE)
  36 #include <mcheck.h>
  37 #endif
  38
  39 #include "defines.h"
  40 #include "conn.h"
  41 #include "conf-ssl.h"
  42 #include "channel.h"
  43 #include "conf.h"
  44 #include "lists.h"
  45 #include "log.h"
  46 #include "parse.h"
  47 #include "sighandlers.h"
  48 #include "io.h"
  49 #include "irc.h"
  50
  51 #include "exp.h"
  52 #include "ngircd.h"
  53
  54
  55 static void Show_Version PARAMS(( void ));
  56 static void Show_Help PARAMS(( void ));
  57
  58 static void Pidfile_Create PARAMS(( pid_t pid ));
  59 static void Pidfile_Delete PARAMS(( void ));
  60
  61 static void Fill_Version PARAMS(( void ));
  62
  63 static void Random_Init PARAMS(( void ));
  64
  65 static void Setup_FDStreams PARAMS(( int fd ));
  66
  67 static bool NGIRCd_Init PARAMS(( bool ));
  68
  69
  70 /**
  71  * The main() function of ngIRCd.
  72  *
  73  * Here all starts: this function is called by the operating system loader,
  74  * it is the first portion of code executed of ngIRCd.
  75  *
  76  * @param argc  The number of arguments passed to ngIRCd on the command line.
  77  * @param argv  An array containing all the arguments passed to ngIRCd.
  78  * @return      Global exit code of ngIRCd, zero on success.
  79  */
  80 GLOBAL int
  81 main( int argc, const char *argv[] )
  82 {
  83         bool ok, configtest = false;
  84         bool NGIRCd_NoDaemon = false;
  85         int i;
  86         size_t n;
  87
  88 #if defined(DEBUG) && defined(HAVE_MTRACE)
  89         /* enable GNU libc memory tracing when running in debug mode
  90          * and functionality available */
  91         mtrace();
  92 #endif
  93
  94         umask( 0077 );
  95
  96         NGIRCd_SignalQuit = NGIRCd_SignalRestart = false;
  97         NGIRCd_Passive = false;
  98 #ifdef DEBUG
  99         NGIRCd_Debug = false;
 100 #endif
 101 #ifdef SNIFFER
 102         NGIRCd_Sniffer = false;
 103 #endif
 104         strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile ));
 105         strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile ));
 106
 107         Fill_Version( );
 108
 109         /* parse conmmand line */
 110         for( i = 1; i < argc; i++ )
 111         {
 112                 ok = false;
 113                 if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' ))
 114                 {
 115                         /* long option */
 116                         if( strcmp( argv[i], "--config" ) == 0 )
 117                         {
 118                                 if( i + 1 < argc )
 119                                 {
 120                                         /* Ok, there's an parameter left */
 121                                         strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 122
 123                                         /* next parameter */
 124                                         i++; ok = true;
 125                                 }
 126                         }
 127                         if( strcmp( argv[i], "--configtest" ) == 0 )
 128                         {
 129                                 configtest = true;
 130                                 ok = true;
 131                         }
 132 #ifdef DEBUG
 133                         if( strcmp( argv[i], "--debug" ) == 0 )
 134                         {
 135                                 NGIRCd_Debug = true;
 136                                 ok = true;
 137                         }
 138 #endif
 139                         if( strcmp( argv[i], "--help" ) == 0 )
 140                         {
 141                                 Show_Version( );
 142                                 puts( "" ); Show_Help( ); puts( "" );
 143                                 exit( 1 );
 144                         }
 145                         if( strcmp( argv[i], "--nodaemon" ) == 0 )
 146                         {
 147                                 NGIRCd_NoDaemon = true;
 148                                 ok = true;
 149                         }
 150                         if( strcmp( argv[i], "--passive" ) == 0 )
 151                         {
 152                                 NGIRCd_Passive = true;
 153                                 ok = true;
 154                         }
 155 #ifdef SNIFFER
 156                         if( strcmp( argv[i], "--sniffer" ) == 0 )
 157                         {
 158                                 NGIRCd_Sniffer = true;
 159                                 ok = true;
 160                         }
 161 #endif
 162                         if( strcmp( argv[i], "--version" ) == 0 )
 163                         {
 164                                 Show_Version( );
 165                                 exit( 1 );
 166                         }
 167                 }
 168                 else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' ))
 169                 {
 170                         /* short option */
 171                         for( n = 1; n < strlen( argv[i] ); n++ )
 172                         {
 173                                 ok = false;
 174 #ifdef DEBUG
 175                                 if (argv[i][n] == 'd') {
 176                                         NGIRCd_Debug = true;
 177                                         ok = true;
 178                                 }
 179 #endif
 180                                 if (argv[i][n] == 'f') {
 181                                         if(( ! argv[i][n + 1] ) && ( i + 1 < argc ))
 182                                         {
 183                                                 /* Ok, next character is a blank */
 184                                                 strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile ));
 185
 186                                                 /* go to the following parameter */
 187                                                 i++;
 188                                                 n = strlen( argv[i] );
 189                                                 ok = true;
 190                                         }
 191                                 }
 192
 193                                 if (argv[i][n] == 'h') {
 194                                         Show_Version();
 195                                         puts(""); Show_Help(); puts("");
 196                                         exit(1);
 197                                 }
 198
 199                                 if (argv[i][n] == 'n') {
 200                                         NGIRCd_NoDaemon = true;
 201                                         ok = true;
 202                                 }
 203                                 if (argv[i][n] == 'p') {
 204                                         NGIRCd_Passive = true;
 205                                         ok = true;
 206                                 }
 207 #ifdef SNIFFER
 208                                 if (argv[i][n] == 's') {
 209                                         NGIRCd_Sniffer = true;
 210                                         ok = true;
 211                                 }
 212 #endif
 213                                 if (argv[i][n] == 't') {
 214                                         configtest = true;
 215                                         ok = true;
 216                                 }
 217
 218                                 if (argv[i][n] == 'V') {
 219                                         Show_Version();
 220                                         exit(1);
 221                                 }
 222
 223                                 if (! ok) {
 224                                         printf( "%s: invalid option \"-%c\"!\n", PACKAGE_NAME, argv[i][n] );
 225                                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 226                                         exit( 1 );
 227                                 }
 228                         }
 229
 230                 }
 231                 if( ! ok )
 232                 {
 233                         printf( "%s: invalid option \"%s\"!\n", PACKAGE_NAME, argv[i] );
 234                         printf( "Try \"%s --help\" for more information.\n", PACKAGE_NAME );
 235                         exit( 1 );
 236                 }
 237         }
 238
 239         /* Debug level for "VERSION" command */
 240         NGIRCd_DebugLevel[0] = '\0';
 241 #ifdef DEBUG
 242         if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" );
 243 #endif
 244 #ifdef SNIFFER
 245         if( NGIRCd_Sniffer )
 246         {
 247                 NGIRCd_Debug = true;
 248                 strcpy( NGIRCd_DebugLevel, "2" );
 249         }
 250 #endif
 251
 252         if( configtest )
 253         {
 254                 Show_Version( ); puts( "" );
 255                 exit( Conf_Test( ));
 256         }
 257
 258         while( ! NGIRCd_SignalQuit )
 259         {
 260                 /* Initialize global variables */
 261                 NGIRCd_Start = time( NULL );
 262                 (void)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start ));
 263
 264                 NGIRCd_SignalRestart = false;
 265                 NGIRCd_SignalQuit = false;
 266
 267                 Random_Init();
 268
 269                 /* Initialize modules, part I */
 270                 Log_Init( ! NGIRCd_NoDaemon );
 271                 Conf_Init( );
 272
 273                 /* Initialize the "main program": chroot environment, user and
 274                  * group ID, ... */
 275                 if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
 276                         Log(LOG_ALERT, "Fatal: Initialization failed");
 277                         exit(1);
 278                 }
 279
 280                 /* Initialize modules, part II: these functions are eventually
 281                  * called with already dropped privileges ... */
 282                 Channel_Init( );
 283                 Client_Init( );
 284                 Conn_Init( );
 285
 286                 if (!io_library_init(CONNECTION_POOL)) {
 287                         Log(LOG_ALERT, "Fatal: Cannot initialize IO routines: %s", strerror(errno));
 288                         exit(1);
 289                 }
 290
 291                 if (!Signals_Init()) {
 292                         Log(LOG_ALERT, "Fatal: Could not set up signal handlers: %s", strerror(errno));
 293                         exit(1);
 294                 }
 295
 296                 /* Create protocol and server identification. The syntax
 297                  * used by ngIRCd in PASS commands and the known "extended
 298                  * flags" are described in doc/Protocol.txt. */
 299 #ifdef IRCPLUS
 300                 snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
 301 #ifdef ZLIB
 302                 strcat( NGIRCd_ProtoID, "Z" );
 303 #endif
 304                 if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
 305 #else
 306                 snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
 307 #endif
 308                 strlcat( NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID );
 309 #ifdef ZLIB
 310                 strlcat( NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID );
 311 #endif
 312                 LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID);
 313
 314                 Channel_InitPredefined( );
 315
 316                 if( Conn_InitListeners( ) < 1 )
 317                 {
 318                         Log( LOG_ALERT, "Server isn't listening on a single port!" );
 319                         Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 320                         Pidfile_Delete( );
 321                         exit( 1 );
 322                 }
 323
 324                 /* Main Run Loop */
 325                 Conn_Handler( );
 326
 327                 Conn_Exit( );
 328                 Client_Exit( );
 329                 Channel_Exit( );
 330                 Log_Exit( );
 331         }
 332         Pidfile_Delete( );
 333
 334         return 0;
 335 } /* main */
 336
 337
 338 /**
 339  * Generate ngIRCd "version strings".
 340  *
 341  * The ngIRCd version information is generated once and then stored in the
 342  * NGIRCd_Version and NGIRCd_VersionAddition string variables for further
 343  * usage, for example by the IRC command "VERSION" and the --version command
 344  * line switch.
 345  */
 346 static void
 347 Fill_Version( void )
 348 {
 349         NGIRCd_VersionAddition[0] = '\0';
 350
 351 #ifdef SYSLOG
 352         strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
 353 #endif
 354 #ifdef ZLIB
 355         if( NGIRCd_VersionAddition[0] )
 356                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 357         strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
 358 #endif
 359 #ifdef SSL_SUPPORT
 360         if ( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 361         strlcat( NGIRCd_VersionAddition, "SSL", sizeof NGIRCd_VersionAddition );
 362 #endif
 363 #ifdef TCPWRAP
 364         if( NGIRCd_VersionAddition[0] )
 365                         strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 366         strlcat( NGIRCd_VersionAddition, "TCPWRAP", sizeof NGIRCd_VersionAddition );
 367 #endif
 368 #ifdef IDENTAUTH
 369         if( NGIRCd_VersionAddition[0] )
 370                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 371         strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
 372 #endif
 373 #ifdef PAM
 374         if (NGIRCd_VersionAddition[0])
 375                 strlcat(NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition);
 376         strlcat(NGIRCd_VersionAddition, "PAM", sizeof NGIRCd_VersionAddition);
 377 #endif
 378 #ifdef DEBUG
 379         if( NGIRCd_VersionAddition[0] )
 380                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 381         strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
 382 #endif
 383 #ifdef SNIFFER
 384         if( NGIRCd_VersionAddition[0] )
 385                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 386         strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
 387 #endif
 388 #ifdef STRICT_RFC
 389         if( NGIRCd_VersionAddition[0] )
 390                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 391         strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
 392 #endif
 393 #ifdef IRCPLUS
 394         if( NGIRCd_VersionAddition[0] )
 395                 strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
 396         strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
 397 #endif
 398 #ifdef WANT_IPV6
 399         if (NGIRCd_VersionAddition[0])
 400                 strlcat(NGIRCd_VersionAddition, "+", sizeof(NGIRCd_VersionAddition));
 401         strlcat(NGIRCd_VersionAddition, "IPv6", sizeof(NGIRCd_VersionAddition));
 402 #endif
 403         if( NGIRCd_VersionAddition[0] )
 404                 strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
 405
 406         strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
 407         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 408         strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
 409         strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
 410         strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
 411
 412         snprintf(NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s",
 413                  PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
 414 } /* Fill_Version */
 415
 416
 417 /**
 418  * Display copyright and version information of ngIRCd on the console.
 419  */
 420 static void
 421 Show_Version( void )
 422 {
 423         puts( NGIRCd_Version );
 424         puts( "Copyright (c)2001-2011 Alexander Barton (<alex@barton.de>) and Contributors." );
 425         puts( "Homepage: <http://ngircd.barton.de/>\n" );
 426         puts( "This is free software; see the source for copying conditions. There is NO" );
 427         puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
 428 } /* Show_Version */
 429
 430
 431 /**
 432  * Display a short help text on the console.
 433  * This help depends on the configuration of the executable and only shows
 434  * options that are actually enabled.
 435  */
 436 static void
 437 Show_Help( void )
 438 {
 439 #ifdef DEBUG
 440         puts( "  -d, --debug        log extra debug messages" );
 441 #endif
 442         puts( "  -f, --config <f>   use file <f> as configuration file" );
 443         puts( "  -n, --nodaemon     don't fork and don't detach from controlling terminal" );
 444         puts( "  -p, --passive      disable automatic connections to other servers" );
 445 #ifdef SNIFFER
 446         puts( "  -s, --sniffer      enable network sniffer and display all IRC traffic" );
 447 #endif
 448         puts( "  -t, --configtest   read, validate and display configuration; then exit" );
 449         puts( "  -V, --version      output version information and exit" );
 450         puts( "  -h, --help         display this help and exit" );
 451 } /* Show_Help */
 452
 453
 454 /**
 455  * Delete the file containing the process ID (PID).
 456  */
 457 static void
 458 Pidfile_Delete( void )
 459 {
 460         /* Pidfile configured? */
 461         if( ! Conf_PidFile[0] ) return;
 462
 463 #ifdef DEBUG
 464         Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
 465 #endif
 466
 467         if( unlink( Conf_PidFile ))
 468                 Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
 469 } /* Pidfile_Delete */
 470
 471
 472 /**
 473  * Create the file containing the process ID of ngIRCd ("PID file").
 474  *
 475  * @param pid   The process ID to be stored in this file.
 476  */
 477 static void
 478 Pidfile_Create(pid_t pid)
 479 {
 480         int pidfd;
 481         char pidbuf[64];
 482         int len;
 483
 484         /* Pidfile configured? */
 485         if( ! Conf_PidFile[0] ) return;
 486
 487 #ifdef DEBUG
 488         Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
 489 #endif
 490
 491         pidfd = open( Conf_PidFile, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 492         if ( pidfd < 0 ) {
 493                 Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 494                 return;
 495         }
 496
 497         len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
 498         if (len < 0 || len >= (int)sizeof pidbuf) {
 499                 Log( LOG_ERR, "Error converting pid");
 500                 return;
 501         }
 502
 503         if (write(pidfd, pidbuf, (size_t)len) != (ssize_t)len)
 504                 Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
 505
 506         if( close(pidfd) != 0 )
 507                 Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
 508 } /* Pidfile_Create */
 509
 510
 511 /**
 512  * Redirect stdin, stdout and stderr to apropriate file handles.
 513  *
 514  * @param fd    The file handle stdin, stdout and stderr should be redirected to.
 515  */
 516 static void
 517 Setup_FDStreams(int fd)
 518 {
 519         if (fd < 0)
 520                 return;
 521
 522         fflush(stdout);
 523         fflush(stderr);
 524
 525         /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
 526         dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
 527 } /* Setup_FDStreams */
 528
 529
 530 /**
 531  * Get user and group ID of unprivileged "nobody" user.
 532  *
 533  * @param uid   User ID
 534  * @param gid   Group ID
 535  * @return      true on success.
 536  */
 537 static bool
 538 NGIRCd_getNobodyID(uid_t *uid, gid_t *gid )
 539 {
 540         struct passwd *pwd;
 541
 542 #ifdef __CYGWIN__
 543         /* Cygwin kludge.
 544          * It can return EINVAL instead of EPERM
 545          * so, if we are already unprivileged,
 546          * use id of current user.
 547          */
 548         if (geteuid() && getuid()) {
 549                 *uid = getuid();
 550                 *gid = getgid();
 551                 return true;
 552         }
 553 #endif
 554
 555         pwd = getpwnam("nobody");
 556         if (!pwd) return false;
 557
 558         if ( !pwd->pw_uid || !pwd->pw_gid)
 559                 return false;
 560
 561         *uid = pwd->pw_uid;
 562         *gid = pwd->pw_gid;
 563         endpwent();
 564
 565         return true;
 566 } /* NGIRCd_getNobodyID */
 567
 568
 569 static bool
 570 Random_Init_Kern(const char *file)
 571 {
 572         unsigned int seed;
 573         bool ret = false;
 574         int fd = open(file, O_RDONLY);
 575         if (fd >= 0) {
 576                 if (read(fd, &seed, sizeof(seed)) == sizeof(seed))
 577                         ret = true;
 578                 close(fd);
 579                 srandom(seed);
 580         }
 581         return ret;
 582 }
 583
 584 /**
 585  * Initialize libc random(3) number generator
 586  */
 587 static void
 588 Random_Init(void)
 589 {
 590         if (Random_Init_Kern("/dev/urandom"))
 591                 return;
 592         if (Random_Init_Kern("/dev/random"))
 593                 return;
 594         if (Random_Init_Kern("/dev/arandom"))
 595                 return;
 596         srandom(random() ^ getpid() ^ time(NULL));
 597 }
 598
 599
 600 /**
 601  * Initialize ngIRCd daemon.
 602  *
 603  * @param NGIRCd_NoDaemon       Set to true if ngIRCd should run in the
 604  *                              foreground and not as a daemon.
 605  * @return                      true on success.
 606  */
 607 static bool
 608 NGIRCd_Init( bool NGIRCd_NoDaemon )
 609 {
 610         static bool initialized;
 611         bool chrooted = false;
 612         struct passwd *pwd;
 613         struct group *grp;
 614         int real_errno, fd = -1;
 615         pid_t pid;
 616
 617         if (initialized)
 618                 return true;
 619
 620         if (!NGIRCd_NoDaemon) {
 621                 /* open /dev/null before chroot() */
 622                 fd = open( "/dev/null", O_RDWR);
 623                 if (fd < 0)
 624                         Log(LOG_WARNING, "Could not open /dev/null: %s", strerror(errno));
 625         }
 626
 627         if (!ConnSSL_InitLibrary())
 628                 Log(LOG_WARNING,
 629                     "Warning: Error during SSL initialization, continuing ...");
 630
 631         if( Conf_Chroot[0] ) {
 632                 if( chdir( Conf_Chroot ) != 0 ) {
 633                         Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
 634                         goto out;
 635                 }
 636
 637                 if( chroot( Conf_Chroot ) != 0 ) {
 638                         if (errno != EPERM) {
 639                                 Log( LOG_ERR, "Can't change root directory to \"%s\": %s",
 640                                                                 Conf_Chroot, strerror( errno ));
 641                                 goto out;
 642                         }
 643                 } else {
 644                         chrooted = true;
 645                         Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
 646                 }
 647         }
 648
 649         if (Conf_UID == 0) {
 650                 Log(LOG_INFO, "ServerUID must not be 0, using \"nobody\" instead.", Conf_UID);
 651
 652                 if (! NGIRCd_getNobodyID(&Conf_UID, &Conf_GID)) {
 653                         Log(LOG_WARNING, "Could not get user/group ID of user \"nobody\": %s",
 654                                         errno ? strerror(errno) : "not found" );
 655                         goto out;
 656                 }
 657         }
 658
 659         if (getgid() != Conf_GID) {
 660                 /* Change group ID */
 661                 if (setgid(Conf_GID) != 0) {
 662                         real_errno = errno;
 663                         Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
 664                         if (real_errno != EPERM)
 665                                 goto out;
 666                 }
 667         }
 668
 669         if (getuid() != Conf_UID) {
 670                 /* Change user ID */
 671                 if (setuid(Conf_UID) != 0) {
 672                         real_errno = errno;
 673                         Log(LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror(errno));
 674                         if (real_errno != EPERM)
 675                                 goto out;
 676                 }
 677         }
 678
 679         initialized = true;
 680
 681         /* Normally a child process is forked which isn't any longer
 682          * connected to ther controlling terminal. Use "--nodaemon"
 683          * to disable this "daemon mode" (useful for debugging). */
 684         if ( ! NGIRCd_NoDaemon ) {
 685                 pid = fork( );
 686                 if( pid > 0 ) {
 687                         /* "Old" process: exit. */
 688                         exit( 0 );
 689                 }
 690                 if( pid < 0 ) {
 691                         /* Error!? */
 692                         fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
 693                                                                 PACKAGE_NAME, strerror( errno ));
 694                         exit( 1 );
 695                 }
 696
 697                 /* New child process */
 698 #ifndef NeXT
 699                 (void)setsid( );
 700 #else
 701                 setpgrp(0, getpid());
 702 #endif
 703                 if (chdir( "/" ) != 0)
 704                         Log(LOG_ERR, "Can't change directory to '/': %s",
 705                                      strerror(errno));
 706
 707                 /* Detach stdin, stdout and stderr */
 708                 Setup_FDStreams(fd);
 709                 if (fd > 2)
 710                         close(fd);
 711         }
 712         pid = getpid();
 713
 714         Pidfile_Create( pid );
 715
 716         /* Check UID/GID we are running as, can be different from values
 717          * configured (e. g. if we were already started with a UID>0. */
 718         Conf_UID = getuid();
 719         Conf_GID = getgid();
 720
 721         pwd = getpwuid( Conf_UID );
 722         grp = getgrgid( Conf_GID );
 723
 724         Log(LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
 725                                 pwd ? pwd->pw_name : "unknown", (long)Conf_UID,
 726                                 grp ? grp->gr_name : "unknown", (long)Conf_GID, (long)pid);
 727
 728         if (chrooted) {
 729                 Log(LOG_INFO, "Running with root directory \"%s\".",
 730                     Conf_Chroot );
 731                 return true;
 732         } else
 733                 Log(LOG_INFO, "Not running with changed root directory.");
 734
 735         /* Change working directory to home directory of the user
 736          * we are running as (only when running in daemon mode and not in chroot) */
 737
 738         if (pwd) {
 739                 if (!NGIRCd_NoDaemon ) {
 740                         if( chdir( pwd->pw_dir ) == 0 )
 741                                 Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
 742                         else
 743                                 Log( LOG_INFO, "Notice: Can't change working directory to \"%s\": %s",
 744                                                                 pwd->pw_dir, strerror( errno ));
 745                 }
 746         } else {
 747                 Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
 748         }
 749
 750         return true;
 751  out:
 752         if (fd > 2)
 753                 close(fd);
 754         return false;
 755 } /* NGIRCd_Init */
 756
 757
 758 /* -eof- */