main() {
while read -r host port; do
while read -r ip; do
- echo $ip | egrep '[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*' &>/dev/null || continue
+ echo $ip | grep -E '[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*' &>/dev/null || continue
printf "remote %s %s\n" "$ip" "$port" >>$conf
ret=0
done < <(timeout -s 9 1 dig +short $host ||:)