Kickstart Prompt for user input

example.ks

......
%include /tmp/networkconfig

%pre --interpreter=busybox

exec < /dev/tty1 > /dev/tty1 2>&1
chvt 1
HOSTNAME=""
IPADDR=""
NETMASK=""
GATEWAY=""
DNS=""

while [[ "$HOSTNAME" == "" ]] || [[ "${IPADDR}" == "" ]] || [[ "${NETMASK}" == "" ]] || [[ "${GATEWAY}" == "" ]] || [[ "${DNS}" == "" ]] ; do
 echo
 echo " *** Please enter the following details: *** "
 echo
 read -p "Hostname: " HOSTNAME
 read -p "IP Address: " IPADDR
 read -p "Netmask: " NETMASK
 read -p "Gateway: " GATEWAY
 read -p "DNS: " DNS
done
clear

echo "network --bootproto=static --device=vmnic0 --ip=${IPADDR} --netmask=${NETMASK} --gateway=${GATEWAY} --nameserver=${DNS} --hostname=${HOSTNAME}" > /tmp/networkconfig

echo -e "Applying the following configuration: \n"
echo "Hostname = ${HOSTNAME}"
echo "IP Address = ${IPADDR}"
echo "Netmask = ${NETMASK}"
echo "Gateway = ${GATEWAY}"
echo -e "DNS = ${DNS}\n"
sleep 5
chvt 2

............