WhatSize in bash (fast and dirty)

#!/bin/bash
if [ "$1" = "" ]; then
	listlength=10
else
	listlength=$1
fi
du -s * | sort -rn | head -n $listlength \
| sed s/^[0-9]*// | while read item
do 
	if [ "$item" = "" ]; then
		continue
	fi
	echo `du -hs "$item"`
done