//sys/class/tty/ttyS2/subsystem/tty20/subsystem/tty47/subsystem/tty21/subsystem/tty59/subsystem/tty54/subsystem/tty16/subsystem/ttyS0/subsystem/tty7/subsystem/tty20/subsystem/tty15/subsystem/tty18/subsystem/tty57/subsystem/ttyS1/uevent