#!/bin/sh for IP in $* ; do if [ $(perl -e "exit(${IP} =~ /^\d+\.\d+\.\d+\.\d+\$/ ? 1 : 0)") ] ; then # " geoiplookup6 ${IP} else # geoiplookup6 $(IPv4-to-IPv6.pl ${IP}) geoiplookup6 ::ffff:${IP}) fi done