1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _CA_GET_CAP:
11
12==========
13CA_GET_CAP
14==========
15
16Name
17----
18
19CA_GET_CAP
20
21
22Synopsis
23--------
24
25.. c:function:: int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)
26    :name: CA_GET_CAP
27
28
29Arguments
30---------
31
32``fd``
33  File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
34
35``caps``
36  Pointer to struct :c:type:`ca_caps`.
37
38Description
39-----------
40
41Queries the Kernel for information about the available CA and descrambler
42slots, and their types.
43
44Return Value
45------------
46
47On success 0 is returned and :c:type:`ca_caps` is filled.
48
49On error, -1 is returned and the ``errno`` variable is set
50appropriately.
51
52The generic error codes are described at the
53:ref:`Generic Error Codes <gen-errors>` chapter.
54