#! /bin/sh
default="$2"
while :
do
	echo "$1 [$2]? " | tr -d '\012' >/dev/tty	# echo -n, semiportably
	read answer
	case "$answer" in
	!*)	cmd="`expr \"$answer\" : '!\(.*\)'`"
		trap : 2
		${SHELL-/bin/sh} -c "$cmd" >/dev/tty
		trap 2
		echo '!' >/dev/tty
		;;
	*)	break	;;	# NOTE BREAK OUT
	esac
done
case "$answer" in
'')	answer="$default"	;;
-)	answer=			;;
esac
echo "$answer"
