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.. _FE_GET_FRONTEND:
11
12***************
13FE_GET_FRONTEND
14***************
15
16Name
17====
18
19FE_GET_FRONTEND
20
21.. attention:: This ioctl is deprecated.
22
23
24Synopsis
25========
26
27.. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)
28    :name: FE_GET_FRONTEND
29
30
31Arguments
32=========
33
34``fd``
35    File descriptor returned by :c:func:`open() <dvb-fe-open>`.
36
37
38``p``
39    Points to parameters for tuning operation.
40
41
42Description
43===========
44
45This ioctl call queries the currently effective frontend parameters. For
46this command, read-only access to the device is sufficient.
47
48
49Return Value
50============
51
52On success 0 is returned.
53
54On error -1 is returned, and the ``errno`` variable is set
55appropriately.
56
57.. flat-table::
58    :header-rows:  0
59    :stub-columns: 0
60
61
62    -  .. row 1
63
64       -  ``EINVAL``
65
66       -  Maximum supported symbol rate reached.
67
68Generic error codes are described at the
69:ref:`Generic Error Codes <gen-errors>` chapter.
70