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

# PATH=:/bin:/usr/bin:/csrel25/bin
# . /csrel25/etc/csspath	# sets path for local system

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
	if [ -s $i ]
	then
		overwrite $i sed "s@$left@$right@g" $i
	fi
done