test -r "$vdir/ionice/class" && read ionice_class <"$vdir"/ionice/class
test -r "$vdir/ionice/priority" && read ionice_priority <"$vdir"/ionice/priority
test -r "$vdir/ionice/class" && read ionice_class <"$vdir"/ionice/class
test -r "$vdir/ionice/priority" && read ionice_priority <"$vdir"/ionice/priority