tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _FE_GET_FRONTEND:
4
5***************
6FE_GET_FRONTEND
7***************
8
9Name
10====
11
12FE_GET_FRONTEND
13
14.. attention:: This ioctl is deprecated.
15
16
17Synopsis
18========
19
20.. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)
21 :name: FE_GET_FRONTEND
22
23
24Arguments
25=========
26
27``fd``
28 File descriptor returned by :c:func:`open() <dvb-fe-open>`.
29
30
31``p``
32 Points to parameters for tuning operation.
33
34
35Description
36===========
37
38This ioctl call queries the currently effective frontend parameters. For
39this command, read-only access to the device is sufficient.
40
41
42Return Value
43============
44
45On success 0 is returned.
46
47On error -1 is returned, and the ``errno`` variable is set
48appropriately.
49
50.. flat-table::
51 :header-rows: 0
52 :stub-columns: 0
53
54
55 - .. row 1
56
57 - ``EINVAL``
58
59 - Maximum supported symbol rate reached.
60
61Generic error codes are described at the
62:ref:`Generic Error Codes <gen-errors>` chapter.