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_SET_DESCR:
11
12============
13CA_SET_DESCR
14============
15
16Name
17----
18
19CA_SET_DESCR
20
21
22Synopsis
23--------
24
25.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)
26    :name: CA_SET_DESCR
27
28
29Arguments
30---------
31
32``fd``
33  File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
34
35``msg``
36  Pointer to struct :c:type:`ca_descr`.
37
38Description
39-----------
40
41CA_SET_DESCR is used for feeding descrambler CA slots with descrambling
42keys (referred as control words).
43
44Return Value
45------------
46
47On success 0 is returned.
48
49On error -1 is returned, and the ``errno`` variable is set
50appropriately.
51
52Generic error codes are described at the
53:ref:`Generic Error Codes <gen-errors>` chapter.
54