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#!/bin/bash
dnsserver="8.8.8.8"
# function to get IP address
function get_ipaddr {
ip_address=""
# A and AAA record for IPv4 and IPv6, respectively
# $1 stands for first argument
if [ -n "$1" ]; then
hostname="${1}"
if [ -z "query_type" ]; then
query_type="A"
fi
# use host command for DNS lookup operations
host -t ${query_type} ${hostname} &>/dev/null ${dnsserver}
if [ "$?" -eq "0" ]; then
# get ip address
ip_address="$(host -t ${query_type} ${hostname} ${dnsserver}| awk '/has.*address/{print $NF; exit}')"
else
exit 1
fi
else
exit 2
fi
# display ip
echo $ip_address
}
hostname="${1}"
for query in "A-IPv4"; do
query_type="$(printf $query | cut -d- -f 1)"
ipversion="$(printf $query | cut -d- -f 2)"
address="$(get_ipaddr ${hostname})"
if [ "$?" -eq "0" ]; then
if [ -n "${address}" ]; then
echo "$address"
fi
else
echo "An error occurred"
fi
done
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