if [ "$1" = "etc" ]; then
    rsync ${RSYNCOPTS} "${srcetc}" "${buetc}"
    if [ "$2" = "verify" ]; then
        echo "Überprüfe Backup - bitte warten"

        temp_file="$(mktemp)"

        ### create hashes for files in source
        pushd "${srcetc}"
        find -H ./ -xdev -type f -exec md5sum -b -- '{}' '+' 1>"${temp_file}" 2>'/dev/null'
        popd

        ### compare to hashes in destination
        pushd "${buetc}"
        if md5sum -c "${temp_file}"; then
            rm -- "${temp_file}"
        else
            echo "Retaining checksum file \"${temp_file}\"."
        fi
        popd
    fi
fi