//sys/class/tty/tty21/subsystem/ttyS0/subsystem/tty30/subsystem/tty37/subsystem/tty9/subsystem/tty59/subsystem/tty57/subsystem/tty9/subsystem/ttyS2/subsystem/tty11/subsystem/tty47/subsystem/tty7/subsystem/ttyS2/device/tty:ttyS3/subsystem/tty20/uevent