Add copyright and GPL v2 or later notices to Andy Piper's contributions, with his permission. See: http://calypso.tux.org/pipermail/xemacs-beta/2009-December/018041.html

#!/bin/sh
if
test -r $2
then
if
cmp $1 $2 > /dev/null
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi