#!/bin/bash
if [ -z "$1" -o "$1" == " " ]; then
        echo "usage: remove_host.sh <hostname>"
        echo "EXAMPLE: remove_host.sh myhost will remove myhost.dyn.mydomain.ch"
        exit 1
fi
cd /etc/bind/dyn/
hostname=${1}.dyn.mydomain.ch.
echo "old keys.conf entry: "
grep -E '[ "]'"${hostname}"'[."]\s' keys.conf
echo "remove key for ${hostname}"
sed -i '/[ "]'"${hostname}"'[."]\s/d' keys.conf
echo "reload bind";
/usr/sbin/rndc reload
echo "delete dns entry for ${hostname}"
echo -e "update delete ${hostname} a\nsend" | nsupdate -l -4
/usr/sbin/rndc sync -clean
echo "currently allowed hosts:"
grep "key " keys.conf | awk '{ print $2; }' | tr -d ";"