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.. -*- coding: utf-8; mode: rst -*-
.. _CA_SET_DESCR:
============
CA_SET_DESCR
============
Name
----
CA_SET_DESCR
Synopsis
--------
.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)
:name: CA_SET_DESCR
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
``msg``
Pointer to struct :c:type:`ca_descr`.
.. c:type:: ca_descr
.. code-block:: c
struct ca_descr {
unsigned int index;
unsigned int parity;
unsigned char cw[8];
};
Description
-----------
.. note:: This ioctl is undocumented. Documentation is welcome.
Return Value
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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