#!/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

# Source function library.

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

# Source networking configuration.

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

# Check that networking is up.

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

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

# 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

RETVAL=0

named='named'

if [[ "$ENABLE_SDB" = [yY1]* ]] && [ -x /usr/sbin/named_sdb ]; then

    named='named_sdb';

fi;

prog=$named

[ -x /usr/sbin/$named ] || exit 1

nmdcOption()

{ let i=0; 

  for a in $*; 

  do ((++i)); 

     if [ $a = -c ]; then 

	 ((++i)); 

	 eval 'echo $'$i;

     elif [[ $a = -c* ]]; then 

	 echo ${a#-c}; 

     fi; 

  done; 

}

named_c_option=`nmdcOption $OPTIONS`;

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

if [ ! -r ${ROOTDIR}${named_conf} ] ; then

   if [ -z "$named_c_option" ] && [ -r ${ROOTDIR}/etc/named.caching-nameserver.conf ]; then

       named_conf='/etc/named.caching-nameserver.conf';

       OPTIONS="$OPTIONS -c ${named_conf}";

   else

       echo Locating $ROOTDIR/${named_conf} failed:

       failure

       echo;

       exit 1;

   fi;

fi;

dbusEnabled=0;

for a in $OPTIONS; do

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

	dbusEnabled=1;

    fi;

done

if [ $dbusEnabled -eq 0 ] && [ -z "$DISABLE_NAMED_DBUS" ] ; then

    NetworkManagerEnabled=0

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

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

	    NetworkManagerEnabled=1; 

	fi; 

    done

    if [ $NetworkManagerEnabled -eq 1 ]; then

	OPTIONS="$OPTIONS -D";

    fi;

    dbusEnabled=1;

fi

start() {

        # Start daemons.

        echo -n $"Starting $named: "

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

		echo -n $"$named: already running"

		failure

		echo

		return 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}";

		if [ -s /etc/localtime ]; then

		    cp -fp /etc/localtime ${ROOTDIR}/etc/localtime

		fi;

		if [ ! -d ${ROOTDIR}/proc ]; then

		    mkdir -p ${ROOTDIR}/proc

		fi

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

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

		fi

		if [ $dbusEnabled -eq 1 ]; then

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

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

			if [ ! -d  /var/run/dbus ] ; then

			    mkdir -p /var/run/dbus ;

			fi;

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

		    fi;		    

		fi;		

	fi

	no_write_master_zones=0

	if [ -e /etc/selinux/config ]; then

           .  /etc/selinux/config

           if [[ ( "$SELINUX" != 'disabled') && ("$SELINUXTYPE" != "") && (-d /etc/selinux/${SELINUXTYPE}) && (-e /etc/selinux/${SELINUXTYPE}/booleans || (-e /etc/selinux/${SELINUXTYPE}/booleans.local)) ]]; then

	       if [ -e /etc/selinux/${SELINUXTYPE}/booleans.local ]; then

		   . /etc/selinux/${SELINUXTYPE}/booleans.local;

	       else

		   . /etc/selinux/${SELINUXTYPE}/booleans;

               fi;

	       if echo "$named_write_master_zones" | /bin/egrep -q '^[0-9]+$'; then

		   if [ "$named_write_master_zones" -eq 1 ] ; then

		       /bin/chown -f --from=root:named named:named $ROOTDIR/var/named

		   elif [ "$named_write_master_zones" -eq 0 ] ; then

		       /bin/chown -f --from=named:named root:named $ROOTDIR/var/named

		   fi;

               fi;

	   else

	       no_write_master_zones=1

	   fi;

	else

	    no_write_master_zones=1

        fi;

	if [ "$no_write_master_zones" -eq 1 ]; then

	    if [[ "$ENABLE_ZONE_WRITE" =  [yY1]* ]]; then

		/bin/chown -f --from=root:named named:named $ROOTDIR/var/named

	    elif [[ "$ENABLE_ZONE_WRITE" =  [nN0]* ]]; then	        

		/bin/chown -f --from=named:named root:named $ROOTDIR/var/named

	    fi;

	fi

        conf_ok=0;

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

           conf_ok=1;

        else

	   RETVAL=$?;

	fi

	if [ $conf_ok -eq 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 2>/dev/null

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

	       if [ "$named" = "named_sdb" ]; then

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

	       fi;

	   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;

		  if [ "$named" = "named_sdb" ]; then

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

		  fi;

	       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

	   if [ -x /usr/bin/logger ]; then

	       echo "$named_err" | /usr/bin/logger -pdaemon.error -tnamed 

           fi;

           return $RETVAL;

        fi;

 	[ $RETVAL -eq 0 ] && touch /var/lock/subsys/named 

        echo

	return $RETVAL

}

stop() {

        # Stop daemons.

        echo -n $"Stopping $named: "

	/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 -n $"no response, killing with -TERM "

			break

        	   else

			sleep 2 && echo -n "."

			timeout=$((timeout+2))

		   fi;

		else

		   break

                fi;

            done

	fi;

	if [ $RETVAL -eq 0 ]; then

	    rm -f /var/lock/subsys/named

	    rm -f /var/run/named.pid

	    rm -f /var/run/named_sdb.pid 2>/dev/null	    

	fi;

	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 [ $dbusEnabled -eq 1 ]; 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

        fi;

	echo

	return $RETVAL

}

rhstatus() {

	/usr/sbin/rndc status

	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 $?

}

probe() {

	# named knows how to reload intelligently; we don't want linuxconf

	# to offer to restart every time

	/usr/sbin/rndc reload >/dev/null 2>&1 || echo start

	return $?

}

checkconfig() {

        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}";  

	fi;

	if [ -x /usr/sbin/named-checkconf ] && [ -x /usr/sbin/named-checkzone ] && /usr/sbin/named-checkconf $ckcf_options ${named_conf} | cat ; then

	    return 0;

	else

	    return 1;

	fi

}

# See how we were called.

case "$1" in

	start)

		start

		;;

	stop)

		stop

		;;

	status)

		rhstatus

		;;

	restart)

		restart

		;;

	condrestart)

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

		;;

	reload)

		reload

		;;

	probe)

		probe

		;;

        checkconfig|configtest|check|test)

	        checkconfig

		;;

	*)

        	echo $"Usage: $0 {start|stop|status|restart|condrestart|reload|probe}"

		exit 1

esac

exit $?