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#!/bin/bash
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#
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# named           This shell script takes care of starting and stopping
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#                 named (BIND DNS server).
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#
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# chkconfig: - 13 87
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# description: named (BIND) is a Domain Name Server (DNS) \
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# that is used to resolve host names to IP addresses.
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# probe: true
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# Source function library.
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. /etc/rc.d/init.d/functions
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# Source networking configuration.
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[ -r /etc/sysconfig/network ] && . /etc/sysconfig/network
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# Check that networking is up.
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[ "${NETWORKING}" = "no" ] && exit 1
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[ -r /etc/sysconfig/named ] && . /etc/sysconfig/named
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# Don't kill named during clean-up
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NAMED_SHUTDOWN_TIMEOUT=${NAMED_SHUTDOWN_TIMEOUT:-100}
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if [ -n "$ROOTDIR" ]; then
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   ROOTDIR=`echo $ROOTDIR | sed 's#//*#/#g;s#/$##'`;
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   rdl=`/usr/bin/readlink $ROOTDIR`;
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   if [ -n "$rdl" ]; then
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      ROOTDIR="$rdl";
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   fi;
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fi
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RETVAL=0
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named='named'
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if [[ "$ENABLE_SDB" = [yY1]* ]] && [ -x /usr/sbin/named_sdb ]; then
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    named='named_sdb';
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fi;
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prog=$named
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[ -x /usr/sbin/$named ] || exit 1
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nmdcOption()
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{ let i=0; 
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  for a in $*; 
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  do ((++i)); 
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     if [ $a = -c ]; then 
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	 ((++i)); 
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	 eval 'echo $'$i;
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     elif [[ $a = -c* ]]; then 
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	 echo ${a#-c}; 
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     fi; 
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  done; 
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}
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named_c_option=`nmdcOption $OPTIONS`;
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named_conf=${named_c_option:-/etc/named.conf};
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if [ ! -r ${ROOTDIR}${named_conf} ] ; then
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   if [ -z "$named_c_option" ] && [ -r ${ROOTDIR}/etc/named.caching-nameserver.conf ]; then
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       named_conf='/etc/named.caching-nameserver.conf';
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       OPTIONS="$OPTIONS -c ${named_conf}";
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   else
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       echo Locating $ROOTDIR/${named_conf} failed:
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       failure
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       echo;
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       exit 1;
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   fi;
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fi;
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dbusEnabled=0;
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for a in $OPTIONS; do
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    if [ $a  = "-D" ]; then
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	dbusEnabled=1;
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    fi;
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done
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if [ $dbusEnabled -eq 0 ] && [ -z "$DISABLE_NAMED_DBUS" ] ; then
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    NetworkManagerEnabled=0
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    for l in 0 1 2 3 4 5 6; do 
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	if /sbin/chkconfig --level=$l NetworkManager >/dev/null 2>&1; then 
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	    NetworkManagerEnabled=1; 
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	fi; 
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    done
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    if [ $NetworkManagerEnabled -eq 1 ]; then
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	OPTIONS="$OPTIONS -D";
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    fi;
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    dbusEnabled=1;
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fi
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start() {
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        # Start daemons.
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        echo -n $"Starting $named: "
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	if [ -n "`/sbin/pidof -o %PPID $named`" ]; then
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		echo -n $"$named: already running"
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		failure
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		echo
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		return 1
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	fi
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	ckcf_options='-z'; # enable named-checkzone for each zone (9.3.1+) !
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	if [ -n "${ROOTDIR}" -a "x${ROOTDIR}" != "x/" ]; then
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		OPTIONS="${OPTIONS} -t ${ROOTDIR}"
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		ckcf_options="$ckcf_options -t ${ROOTDIR}";
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		if [ -s /etc/localtime ]; then
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		    cp -fp /etc/localtime ${ROOTDIR}/etc/localtime
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		fi;
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		if [ ! -d ${ROOTDIR}/proc ]; then
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		    mkdir -p ${ROOTDIR}/proc
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		fi
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		if ! egrep -q '^/proc[[:space:]]+'${ROOTDIR}'/proc' /proc/mounts; then
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		    mount --bind -n /proc ${ROOTDIR}/proc >/dev/null 2>&1 
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		fi
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		if [ $dbusEnabled -eq 1 ]; then
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		    if ! egrep -q '^/[^[:space:]]+[[:space:]]+'${ROOTDIR}'/var/run/dbus' /proc/mounts; then
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			mkdir -p ${ROOTDIR}/var/run/dbus
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			if [ ! -d  /var/run/dbus ] ; then
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			    mkdir -p /var/run/dbus ;
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			fi;
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			mount --bind -n /var/run/dbus ${ROOTDIR}/var/run/dbus > /dev/null 2>&1;
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		    fi;		    
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		fi;		
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	fi
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	no_write_master_zones=0
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	if [ -e /etc/selinux/config ]; then
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           .  /etc/selinux/config
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           if [[ ( "$SELINUX" != 'disabled') && ("$SELINUXTYPE" != "") && (-d /etc/selinux/${SELINUXTYPE}) && (-e /etc/selinux/${SELINUXTYPE}/booleans || (-e /etc/selinux/${SELINUXTYPE}/booleans.local)) ]]; then
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	       if [ -e /etc/selinux/${SELINUXTYPE}/booleans.local ]; then
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		   . /etc/selinux/${SELINUXTYPE}/booleans.local;
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	       else
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		   . /etc/selinux/${SELINUXTYPE}/booleans;
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               fi;
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	       if echo "$named_write_master_zones" | /bin/egrep -q '^[0-9]+$'; then
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		   if [ "$named_write_master_zones" -eq 1 ] ; then
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		       /bin/chown -f --from=root:named named:named $ROOTDIR/var/named
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		   elif [ "$named_write_master_zones" -eq 0 ] ; then
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		       /bin/chown -f --from=named:named root:named $ROOTDIR/var/named
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		   fi;
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               fi;
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	   else
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	       no_write_master_zones=1
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	   fi;
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	else
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	    no_write_master_zones=1
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        fi;
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	if [ "$no_write_master_zones" -eq 1 ]; then
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	    if [[ "$ENABLE_ZONE_WRITE" =  [yY1]* ]]; then
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		/bin/chown -f --from=root:named named:named $ROOTDIR/var/named
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	    elif [[ "$ENABLE_ZONE_WRITE" =  [nN0]* ]]; then	        
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		/bin/chown -f --from=named:named root:named $ROOTDIR/var/named
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	    fi;
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	fi
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        conf_ok=0;
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	if [ -x /usr/sbin/named-checkconf ] && [ -x /usr/sbin/named-checkzone ] && /usr/sbin/named-checkconf $ckcf_options ${named_conf} >/dev/null 2>&1; then
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           conf_ok=1;
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        else
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	   RETVAL=$?;
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	fi
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	if [ $conf_ok -eq 1 ]; then	   
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	   daemon /usr/sbin/$named -u named ${OPTIONS};
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	   RETVAL=$?;
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	   if [ $RETVAL -eq 0 ]; then
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	       rm -f /var/run/named.pid
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	       rm -f /var/run/named_sdb.pid 2>/dev/null
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	       ln -s $ROOTDIR/var/run/named/named.pid /var/run/named.pid;
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	       if [ "$named" = "named_sdb" ]; then
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		   ln -s $ROOTDIR/var/run/named/named.pid /var/run/named_sdb.pid;
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	       fi;
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	   fi;
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	   if [ -n "`/sbin/pidof -o %PPID $named`" ]; then
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	       # Verify that named actually started (JM 2006-10-04)
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	       if [ ! -e $ROOTDIR/var/run/named/named.pid ]; then
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		  # If there is not a file containing the PID of the now running named daemon then create it (JM 2006-10-04)
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		  echo `/sbin/pidof -o %PPID $named` > $ROOTDIR/var/run/named/named.pid;
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		  if [ "$named" = "named_sdb" ]; then
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		     echo `/sbin/pidof -o %PPID $named` > $ROOTDIR/var/run/named/named_sdb.pid;
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		  fi;
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	       fi;
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	   fi;
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	else
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	   named_err="`/usr/sbin/named-checkconf $ckcf_options $named_conf 2>&1`";	   
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	   echo
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	   echo $"Error in named configuration"':';
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	   echo "$named_err";
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	   failure
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	   echo
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	   if [ -x /usr/bin/logger ]; then
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	       echo "$named_err" | /usr/bin/logger -pdaemon.error -tnamed 
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           fi;
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           return $RETVAL;
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        fi;
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 	[ $RETVAL -eq 0 ] && touch /var/lock/subsys/named 
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        echo
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	return $RETVAL
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}
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stop() {
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        # Stop daemons.
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        echo -n $"Stopping $named: "
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	/usr/sbin/rndc stop >/dev/null 2>&1 
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	RETVAL=$?
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	# is it still here?
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	if /sbin/pidof -o %PPID $named >/dev/null; then
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            timeout=0
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            while : ; do
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		if /sbin/pidof -o %PPID $named >/dev/null; then
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         	   if [ $timeout -ge $NAMED_SHUTDOWN_TIMEOUT ]; then
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		   	killproc $named -TERM >/dev/null 2>&1
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	           	RETVAL=$?
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			echo -n $"no response, killing with -TERM "
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			break
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        	   else
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			sleep 2 && echo -n "."
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			timeout=$((timeout+2))
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		   fi;
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		else
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		   break
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                fi;
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            done
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	fi;
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	if [ $RETVAL -eq 0 ]; then
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	    rm -f /var/lock/subsys/named
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	    rm -f /var/run/named.pid
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	    rm -f /var/run/named_sdb.pid 2>/dev/null	    
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	fi;
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	if [ -n "${ROOTDIR}" -a "x${ROOTDIR}" != "x/" ]; then
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	    if egrep -q '^/proc[[:space:]]+'${ROOTDIR}'/proc' /proc/mounts; then
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	       umount ${ROOTDIR}/proc >/dev/null 2>&1
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	    fi
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            if [ $dbusEnabled -eq 1 ]; then
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	       if egrep -q '^/[^[:space:]]+[[:space:]]+'${ROOTDIR}'/var/run/dbus' /proc/mounts; then
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                  umount ${ROOTDIR}/var/run/dbus > /dev/null 2>&1
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               fi;
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	    fi;
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        fi;
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	if [ $RETVAL -eq 0 ]; then
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	    success
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	else
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	    failure
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        fi;
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	echo
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	return $RETVAL
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}
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rhstatus() {
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	/usr/sbin/rndc status
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	return $?
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}	
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restart() {
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	stop
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	start
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}	
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reload() {
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        echo -n $"Reloading $named: "
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	p=`/sbin/pidof -o %PPID $named`	
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	RETVAL=$?
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	if [ "$RETVAL" -eq 0 ]; then 
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	    /usr/sbin/rndc reload >/dev/null 2>&1 || /bin/kill -HUP $p;
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	    RETVAL=$?
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        fi
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	[ "$RETVAL" -eq 0 ] && success $"$named reload" || failure $"$named reload"
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        echo
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	return $?
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}
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probe() {
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	# named knows how to reload intelligently; we don't want linuxconf
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	# to offer to restart every time
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	/usr/sbin/rndc reload >/dev/null 2>&1 || echo start
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	return $?
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}
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checkconfig() {
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        ckcf_options='-z'; # enable named-checkzone for each zone (9.3.1+) !
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	if [ -n "${ROOTDIR}" -a "x${ROOTDIR}" != "x/" ]; then
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		OPTIONS="${OPTIONS} -t ${ROOTDIR}"
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		ckcf_options="$ckcf_options -t ${ROOTDIR}";  
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	fi;
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	if [ -x /usr/sbin/named-checkconf ] && [ -x /usr/sbin/named-checkzone ] && /usr/sbin/named-checkconf $ckcf_options ${named_conf} | cat ; then
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	    return 0;
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	else
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	    return 1;
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	fi
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}
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# See how we were called.
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case "$1" in
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	start)
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		start
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		;;
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	stop)
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		stop
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		;;
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	status)
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		rhstatus
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		;;
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	restart)
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		restart
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		;;
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	condrestart)
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		if [ -e /var/lock/subsys/named ]; then restart; fi
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		;;
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	reload)
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		reload
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		;;
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	probe)
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		probe
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		;;
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        checkconfig|configtest|check|test)
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	        checkconfig
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		;;
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	*)
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        	echo $"Usage: $0 {start|stop|status|restart|condrestart|reload|probe}"
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		exit 1
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esac
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exit $?
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