# replace:  replace str1 in files with str2, in place

PATH=/bin:/usr/bin

case $# in
0|1|2)	echo 'Usage: replace str1 str2 files' 1>&2; exit 1
esac

left="$1"; right="$2"; shift; shift

for i
do
	overwrite $i sed "s@$left@$right@g" $i
done
