+LOCAL bool
+NGIRCd_getNobodyID(unsigned int *uid, unsigned int *gid )
+{
+ struct passwd *pwd;
+
+ pwd = getpwnam("nobody");
+ if (!pwd) return false;
+
+ if ( !pwd->pw_uid || !pwd->pw_gid)
+ return false;
+
+ *uid = pwd->pw_uid;
+ *gid = pwd->pw_gid;
+ endpwent();
+
+ return true;
+}
+
+
+LOCAL bool
+NGIRCd_Init( bool NGIRCd_NoDaemon )
+{
+ static bool initialized;
+ bool chrooted = false;
+ struct passwd *pwd;
+ struct group *grp;
+ int real_errno;
+ long pid;
+
+ if (initialized)
+ return true;
+
+ if( Conf_Chroot[0] ) {
+ if( chdir( Conf_Chroot ) != 0 ) {
+ Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
+ return false;
+ }
+
+ if( chroot( Conf_Chroot ) != 0 ) {
+ if (errno != EPERM) {
+ Log( LOG_ERR, "Can't change root directory to \"%s\": %s",
+ Conf_Chroot, strerror( errno ));
+
+ return false;
+ }
+ } else {
+ chrooted = true;
+ Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
+ }
+ }
+
+ if ( Conf_UID == 0 ) {
+ Log( LOG_INFO, "Conf_UID must not be 0, switching to user nobody", Conf_UID );
+
+ if (!NGIRCd_getNobodyID(&Conf_UID, &Conf_GID )) {
+ Log( LOG_WARNING, "Could not get uid/gid of user nobody: %s",
+ errno ? strerror(errno) : "not found" );
+ return false;
+ }
+ }
+
+ if( setgid( Conf_GID ) != 0 ) {
+ real_errno = errno;
+ Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
+ if (real_errno != EPERM)
+ return false;
+ }
+
+ if( setuid( Conf_UID ) != 0 ) {
+ real_errno = errno;
+ Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
+ if (real_errno != EPERM)
+ return false;
+ }
+
+ initialized = true;
+
+ /* Normally a child process is forked which isn't any longer
+ * connected to ther controlling terminal. Use "--nodaemon"
+ * to disable this "daemon mode" (useful for debugging). */
+ if ( ! NGIRCd_NoDaemon ) {
+ pid = (long)fork( );
+ if( pid > 0 ) {
+ /* "Old" process: exit. */
+ exit( 0 );
+ }
+ if( pid < 0 ) {
+ /* Error!? */
+ fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
+ PACKAGE_NAME, strerror( errno ));
+ exit( 1 );
+ }
+
+ /* New child process */
+ (void)setsid( );
+ chdir( "/" );
+
+ /* Detach stdin, stdout and stderr */
+ Setup_FDStreams( );
+ }
+ pid = getpid();
+
+ Pidfile_Create( pid );
+
+ /* check uid we are running as, can be different from values configured (e.g. if we were already
+ started with a uid > 0 */
+ Conf_UID = getuid();
+ Conf_GID = getgid();
+
+ assert( Conf_GID > 0);
+ assert( Conf_UID > 0);
+
+ pwd = getpwuid( Conf_UID );
+ grp = getgrgid( Conf_GID );
+ Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
+ pwd ? pwd->pw_name : "unknown", Conf_UID,
+ grp ? grp->gr_name : "unknown", Conf_GID, pid);
+
+ if ( chrooted ) {
+ Log( LOG_INFO, "Running chrooted, chrootdir \"%s\".", Conf_Chroot );
+ return true;
+ } else {
+ Log( LOG_INFO, "Not running chrooted." );
+ }
+
+ /* Change working directory to home directory of the user
+ * we are running as (only when running in daemon mode and not in chroot) */
+
+ if ( pwd ) {
+ if (!NGIRCd_NoDaemon ) {
+ if( chdir( pwd->pw_dir ) == 0 )
+ Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
+ else
+ Log( LOG_ERR, "Can't change working directory to \"%s\": %s",
+ pwd->pw_dir, strerror( errno ));
+ }
+ } else {
+ Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
+ }
+
+return true;
+}
+