#!/bin/sh
for	f
do	if	[ -f $f'-' ]
	then	Rm $f'-'
	fi
	cp $f $f-
done
exit 0
#	Bp file...
# Make backup copies of a list of files, by copying each to a file  named  the
# same, plus a final '-'. We check for this file first, of course, and back it
# up if it exists.  See also Rm.