//sys/class/tty/tty21/subsystem/tty34/subsystem/tty47/subsystem/ttyS0/subsystem/tty8/subsystem/tty27/subsystem/tty40/subsystem/tty6/subsystem/tty32/subsystem/tty2/subsystem/tty10/subsystem/ttyS1/subsystem/ptmx/subsystem/tty54/subsystem/tty13/uevent