.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _CA_GET_DESCR_INFO:

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

Name
----

CA_GET_DESCR_INFO


Synopsis
--------

.. c:function:: int  ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)
    :name: CA_GET_DESCR_INFO

Arguments
---------

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