#!/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.
       echo $"I can't find any configuration file. You can create it by system-config-bind"
       echo $"or install caching-nameserver."
       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 $"no response, killing with -TERM "
			break
        	   else
			sleep 2 && echo -n "."
			timeout=$((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
	sleep 2
	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 $?