"expand_net" wrapper for nmap

expand_net

#!/bin/sh

SORT="cat"

if [ "$1" = "-r" ]; then
	shift
	SORT="sort -R"
fi

if [ -z "$1" ] || [ "$1" = "-h" ]; then
	echo "usage: $0 <CIDR> [...]"
	exit
fi

nmap -sL -oG - -n "$*" | grep Host: | cut -d\  -f2 | $SORT