multi:
type: ipv4
help: Set Domain Name Server (DNS)
update: touch /etc/resolv.conf
if grep -q "$VAR(@)\($\|[[:space:]]\)" /etc/resolv.conf; then
  exit 0
else
  cli_ns_array=($(awk '{if (!$3) print $2}' /etc/resolv.conf))
  cli_ns_array_len=${#cli_ns_array[*]}
  line_num=0
  if [ $cli_ns_array_len -gt 0 ]; then
     grepped_ns_line=`grep "${cli_ns_array[$cli_ns_array_len-1]}$" -n /etc/resolv.conf`
     echo ${grepped_ns_line%%:*} > /etc/resolv_tmp.conf
     line_num=`cat /etc/resolv_tmp.conf`
  fi
     head -$line_num /etc/resolv.conf > /etc/resolv_tmp.conf
     echo "nameserver      $VAR(@)" >> /etc/resolv_tmp.conf
     total_lines=`cat /etc/resolv.conf | wc -l`
     rest_lines=`expr $total_lines - $line_num`
     tail -$rest_lines /etc/resolv.conf >> /etc/resolv_tmp.conf
     mv -f /etc/resolv_tmp.conf /etc/resolv.conf
fi &&
if [ -d /opt/vyatta/config/active/service/dns/forwarding ]; then
   /opt/vyatta/sbin/vyatta-dns-forwarding.pl --update-dnsforwarding >&/dev/null
fi &&
if [ -f /etc/ntp.conf ] && grep -q 'server' /etc/ntp.conf; then
  /usr/sbin/invoke-rc.d ntp restart >&/dev/null
fi
delete:expression: "sudo sh -c \"touch /etc/resolv.conf && \
sed -i '/$VAR(@)$/d' /etc/resolv.conf && \
if [ -f /etc/ntp.conf ] && grep -q 'server' /etc/ntp.conf; then \
  /usr/sbin/invoke-rc.d ntp restart >&/dev/null; \
fi && \
if [ -d /opt/vyatta/config/active/service/dns/forwarding ]; then \
      /opt/vyatta/sbin/vyatta-dns-forwarding.pl --update-dnsforwarding >&/dev/null; \
fi\" "