//sys/class/tty/tty21/subsystem/tty21/subsystem/tty27/subsystem/tty52/subsystem/ptmx/subsystem/tty2/subsystem/tty6/subsystem/tty38/subsystem/tty35/subsystem/tty38/subsystem/ptmx/subsystem/tty34/subsystem/tty1/subsystem/tty39/subsystem/tty55/uevent