//sys/class/tty/tty21/subsystem/tty21/subsystem/tty27/subsystem/tty52/subsystem/ptmx/subsystem/tty2/subsystem/tty6/subsystem/tty38/subsystem/tty6/subsystem/ttyS1/subsystem/tty51/subsystem/tty25/subsystem/tty12/subsystem/tty39/dev