The user cannot enter configurable attributes by way of the command line. Usage Considerations open An open subroutine call specifying the dials special file is processed normally except that the Oflag and Mode parameters are ignored. An open request is rejected if the special file is already opened or if a kernel extension attempts to open the dials special file. All dials inputs are flushed following an open call until an input ring is established. The dials special file does not support read or write subroutine calls.
Input data is obtained from the dials via the input ring.
The GIO special file, kbd special file, lpfk special file, mouse special file, tablet special file. The close subroutine, ioctl subroutine, open subroutine, read subroutine, write subroutine. Special Files Overview . 4.3 Kernel Extensions and Device Support Programming Concepts .