if [ -n "$1" ]; then
        eval $(apt-config shell DPKG Dir::bin::dpkg/f)
        [ -n "$DPKG" ] || DPKG=/usr/bin/dpkg
        "${DPKG}"-query -W -f='${Package} ${db:Status-Abbrev}\n' | awk \
'$1=="linux-image-extra-"rel && $2~/^(r|p)H$/{exit 1}' rel="$1" || exit 0
fi