# The exact wording of the error message is not standardized, but giving
# a description of the errno is useful.

LC_ALL=C
export LC_ALL
r=0

t() {
	exec 3>&1
	errmsg=`cd "$1" 2>&1 >&3 3>&-`
	exec 3>&-
	case $errmsg in
	*[Nn]ot\ a\ directory*)
		;;
	*)
		printf "Wrong error message for %s: %s\n" "$1" "$errmsg"
		r=3
		;;
	esac
}

t /dev/tty
t /dev/tty/x
exit $r