.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: DTV.ca

.. _CA_GET_DESCR_INFO:

=================
CA_GET_DESCR_INFO
=================

Name
----

CA_GET_DESCR_INFO

Synopsis
--------

.. c:macro:: CA_GET_DESCR_INFO

``int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)``

Arguments
---------

``fd``
  File descriptor returned by a previous call to :c:func:`open()`.

``desc``
  Pointer to struct :c:type:`ca_descr_info`.

Description
-----------

Returns information about all descrambler slots.

Return Value
------------

On success 0 is returned, and :c:type:`ca_descr_info` is filled.

On error -1 is returned, and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.