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#!/bin/bash
#set -x
print_usage() {
printf "Usage: aliastest.sh -a alis-domain.tld -d domain.tld domain2.tld"
}
# Get the options
while getopts ":h:a:d:" option; do
case $option in
h) # display Help
print_usage
exit;;
a) # The alias hostname for check
hostname=$OPTARG
;;
d) # Domain or domains
domains=$OPTARG
;;
esac
done
for domain in $domains
do
echo "Check for $domain:"
echo "-------------------"
CNAME=$(dig +short CNAME $domain)
if [ "${CNAME}" == "${hostname}." ]; then
echo "$domain is alias for $hostname"
else
echo "$domain is NOT alias for $hostname"
fi
done
