Find the substring from all files of current directory recursively

lookfor.sh

#!/bin/bash

path='.'
keyword=$1
function deep(){
	for file in `ls $1` ; do
		if test -d $1"/"$file ; then
			deep $1"/"$file
		else
			cat $1"/"$file | grep $keyword > /dev/null
			if [ "$?" == "0" ] ; then
				echo ">>>>>"$1"/"$file
				cat $1"/"$file | grep $keyword
			fi
		fi
	done
}
deep $path