#!/bin/bash
set -e

[[ -z $1 ]] && echo domain? && exit 1
domain=$1

time=`date +%s`

cd /etc/coredns/

[[ ! -r $domain.db.tpl ]] && echo cannot read /etc/coredns/$domain.db.tpl && exit 1

echo writing $domain.db ...
sed "s/@@@serial@@@/$time/" $domain.db.tpl > $domain.db && echo done