function rr
{
	(( $# == 0 )) && print "usage: $0 command ..." && return 64
	typeset tmp1=$(mktemp $0.XXXXXXXXXX)
	typeset tmp2=$(mktemp $0.XXXXXXXXXX)
	trap "rm $tmp1 $tmp2; exit 0" 0 1 2 15
	while eval "$@" >$tmp2
	do
		if ! diff $tmp1 $tmp2
		then
			cp $tmp2 $tmp1
		else
			print -n "."
		fi
		sleep 2
	done
	print
	rm $tmp1 $tmp2
}