#!/bin/bash

#

# named           This shell script takes care of starting and stopping

#                 named (BIND DNS server).

#

# chkconfig: - 13 87

# description: named (BIND) is a Domain Name Server (DNS) \

# that is used to resolve host names to IP addresses.

# probe: true

### BEGIN INIT INFO

# Provides: $named

# Required-Start: $local_fs $network $syslog

# Required-Stop: $local_fs $network $syslog

# Default-Start:

# Default-Stop: 0 1 2 3 4 5 6

# Short-Description: start|stop|status|restart|try-restart|reload|force-reload DNS server

# Description: control ISC BIND implementation of DNS server

### END INIT INFO

# Source function library.

. /etc/rc.d/init.d/functions

[ -r /etc/sysconfig/named ] && . /etc/sysconfig/named

RETVAL=0

export KRB5_KTNAME=${KEYTAB_FILE:-/etc/named.keytab}

# Don't kill named during clean-up

NAMED_SHUTDOWN_TIMEOUT=${NAMED_SHUTDOWN_TIMEOUT:-100}

if [ -n "$ROOTDIR" ]; then

   ROOTDIR=`echo $ROOTDIR | sed 's#//*#/#g;s#/$##'`;

   rdl=`/usr/bin/readlink $ROOTDIR`;

   if [ -n "$rdl" ]; then

      ROOTDIR="$rdl";

   fi;

fi

# Manage forwarders through D-BUS?

for a in $OPTIONS; do

  if [ $a  = "-D" ]; then

    dbusEnabled=1;

  fi;

done

if [ -z $dbusEnabled ] && [ -z "$DISABLE_NAMED_DBUS" ] ; then

  for l in 0 1 2 3 4 5 6; do

    if /sbin/chkconfig --level=$l NetworkManager >/dev/null 2>&1; then

      dbusEnabled=1;

    fi;

  done

  [ -z $dbusEnabled ] || OPTIONS="$OPTIONS -D";

fi;

# Check if all what named needs running

start()

{

  # Source networking configuration.

  [ -r /etc/sysconfig/network ] && . /etc/sysconfig/network

  # Check that networking is up

  [ "${NETWORKING}" = "no" ] && exit 1

  [ -x /usr/sbin/named ] || exit 5

  # Handle -c option

  previous_option='unspecified';

  for a in $OPTIONS; do

    if [ $previous_option = '-c' ]; then

      named_conf=$a;

    fi;

    previous_option=$a;

  done;

  named_conf=${named_conf:-/etc/named.conf};

  if [ ! -r $named_conf ]; then

    echo 'Cannot find configuration file. You could create it by system-config-bind'

    exit 6;

  fi;

  # all pre-start is done, lets start named

  echo -n $"Starting named: "

  if [ -n "`/sbin/pidof -o %PPID named`" ]; then

    echo -n $"named: already running"

    failure

    echo

    exit 1;

  fi;

  ckcf_options='-z'; # enable named-checkzone for each zone (9.3.1+) !

  if [ -n "${ROOTDIR}" -a "x${ROOTDIR}" != "x/" ]; then

    OPTIONS="${OPTIONS} -t ${ROOTDIR}"

    ckcf_options="$ckcf_options -t ${ROOTDIR}";

    [ -s /etc/localtime ] && cp -fp /etc/localtime ${ROOTDIR}/etc/localtime;

    [ -d ${ROOTDIR}/proc ] || mkdir -p ${ROOTDIR}/proc;

    if ! egrep -q '^/proc[[:space:]]+'${ROOTDIR}'/proc' /proc/mounts; then

      mount --bind -n /proc ${ROOTDIR}/proc >/dev/null 2>&1;

    fi

    if [ ! -z $dbusEnabled ]; then

      if ! egrep -q '^/[^[:space:]]+[[:space:]]+'${ROOTDIR}'/var/run/dbus' /proc/mounts; then

        mkdir -p ${ROOTDIR}/var/run/dbus

        [ -d /var/run/dbus ] || mkdir -p /var/run/dbus;

	mount --bind -n /var/run/dbus ${ROOTDIR}/var/run/dbus > /dev/null 2>&1;

      fi;

    fi;

  fi

  RETVAL=0

  # check if configuration is correct

  if [ -x /usr/sbin/named-checkconf ] && [ -x /usr/sbin/named-checkzone ] && /usr/sbin/named-checkconf $ckcf_options ${named_conf} >/dev/null 2>&1; then

    daemon /usr/sbin/named -u named ${OPTIONS};

    RETVAL=$?

    if [ $RETVAL -eq 0 ]; then

      rm -f /var/run/named.pid;

      rm -f /var/run/named_sdb.pid;

      ln -s $ROOTDIR/var/run/named/named.pid /var/run/named.pid;

    fi;

    if [ -n "`/sbin/pidof -o %PPID named`" ]; then

      # Verify that named actually started (JM 2006-10-04)

      if [ ! -e $ROOTDIR/var/run/named/named.pid ]; then

      # If there is not a file containing the PID of the now running named daemon then create it (JM 2006-10-04)

        echo `/sbin/pidof -o %PPID named` > $ROOTDIR/var/run/named/named.pid;

      fi;

    fi;

  else

    named_err="`/usr/sbin/named-checkconf $ckcf_options $named_conf 2>&1`";	   

    echo

    echo "Error in named configuration:";

    echo "$named_err";

    failure

    echo

    [ -x /usr/bin/logger ] && echo "$named_err" | /usr/bin/logger -pdaemon.error -tnamed;

    exit 2;

  fi;

  echo

  if [ $RETVAL -eq 0 ]; then

    touch /var/lock/subsys/named;

  else

    exit 7;

  fi

  return 0;

}

stop() {

  # Stop daemons.

  echo -n $"Stopping named: "

  [ -x /usr/sbin/rndc ] && /usr/sbin/rndc stop >/dev/null 2>&1;

  RETVAL=$?

  # is it still here?

  if /sbin/pidof -o %PPID named >/dev/null; then

    timeout=0

    while : ; do

      if /sbin/pidof -o %PPID named >/dev/null; then

        if [ $timeout -ge $NAMED_SHUTDOWN_TIMEOUT ]; then

          killproc named -TERM >/dev/null 2>&1

          RETVAL=$?

          echo $"no response, killing with -TERM "

          break

        else

          sleep 2 && echo -n "."

          timeout=$((timeout+2))

        fi;

      else

        break

      fi;

    done

  fi;

  # remove pid files

  if [ $RETVAL -eq 0 ]; then

    rm -f /var/lock/subsys/named

    rm -f /var/run/named.pid

  fi;

  # unmount mounted filesystems/directories

  if [ -n "${ROOTDIR}" -a "x${ROOTDIR}" != "x/" ]; then

    if egrep -q '^/proc[[:space:]]+'${ROOTDIR}'/proc' /proc/mounts; then

      umount ${ROOTDIR}/proc >/dev/null 2>&1

    fi

    if [ ! -z $dbusEnabled ]; then

      if egrep -q '^/[^[:space:]]+[[:space:]]+'${ROOTDIR}'/var/run/dbus' /proc/mounts; then

        umount ${ROOTDIR}/var/run/dbus > /dev/null 2>&1

      fi;

    fi;

  fi;

  if [ $RETVAL -eq 0 ]; then

    success

  else

    failure

    RETVAL=1

  fi;

  echo

  return $RETVAL

}

rhstatus() {

  [ -x /usr/sbin/rndc ] && /usr/sbin/rndc status;

  status /usr/bin/named;

  return $?

}	

restart() {

	stop

	start

}	

reload() {

        echo -n $"Reloading named: "

	p=`/sbin/pidof -o %PPID named`	

	RETVAL=$?

	if [ "$RETVAL" -eq 0 ]; then 

	    /usr/sbin/rndc reload >/dev/null 2>&1 || /bin/kill -HUP $p;

	    RETVAL=$?

        fi

	[ "$RETVAL" -eq 0 ] && success $"named reload" || failure $"named reload"

        echo

	return $RETVAL

}

# See how we were called.

case "$1" in

	start)

		start

		;;

	stop)

		stop

		;;

	status)

		rhstatus;

		RETVAL=$?

		;;

	restart)

		restart

		;;

	condrestart)

		echo "condrestart option is obsolete. Use try-restart instead"

		if [ -e /var/lock/subsys/named ]; then restart; fi

		;;

	try-restart)

		if [ -e /var/lock/subsys/named ]; then restart; fi

                ;;

	reload)

		reload

		;;

	force-reload)

		if ! reload; then restart; fi

		;;

	*)

        	echo $"Usage: $0 {start|stop|status|restart|try-restart|reload|force-reload}"

		exit 3

esac

exit $RETVAL