//sys/class/tty/tty21/subsystem/tty20/subsystem/ttyS0/subsystem/tty36/subsystem/tty42/subsystem/tty48/subsystem/tty19/subsystem/tty39/subsystem/tty56/subsystem/tty62/subsystem/tty36/subsystem/tty34/subsystem/tty4/subsystem/tty53/subsystem/tty47/uevent