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.. _CA_GET_CAP:
==========
CA_GET_CAP
==========
Name
----
CA_GET_CAP
Synopsis
--------
.. c:function:: int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)
:name: CA_GET_CAP
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``caps``
Pointer to struct :c:type:`ca_caps`.
Description
-----------
Queries the Kernel for information about the available CA and descrambler
slots, and their types.
Return Value
------------
On success 0 is returned and :c:type:`ca_caps` 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.
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