#!/bin/sh . /lib/udev/udev_persistent_lib.sh read_rules add_first_available "cdrom" [ -n "$ID_CDROM_CD_RW" ] && add_first_available "cdrw" [ -n "$ID_CDROM_DVD" ] && add_first_available "dvd" [ -n "$ID_CDROM_DVD_RW" ] && add_first_available "dvdrw" write_rule "ENV{ID_PATH}==\"$ID_PATH\"" echo $RESULTS