#! /bin/sh
set -e

[ -t 0 ] || exit 1

# TODO: eats pending keystrokes somehow.
result="$(ctlseq -r -R CR "$(printf '\xc3\xb6')" CSI 6 n CR SP SP CR)"
if expr "$result" : '.\+;2R' >/dev/null; then
    exit 0
else
    exit 1
fi