#!/bin/sh

m=10

useage () {
	echo "Usage: head [OPTION]... [FILE]..."
	echo -e "\t-n,-[0-9]+\tprint first NUMBER lines instead of first 10"
	exit 1
}

while [ "$1" ] ; do
	case "$1" in
		-n)	m="$2"	; shift ; shift ;;
		-[0-9]*)	m=${1#-}; shift ;;
		-*)	useage ;;
		*)	break;
	esac
done

exec grep -m$m "" $*