blob: 198f6dfb53a17bc0a2086ca3d6e3ef3d05482535 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
.. -*- coding: utf-8; mode: rst -*-
.. _FE_READ_SIGNAL_STRENGTH:
***********************
FE_READ_SIGNAL_STRENGTH
***********************
Name
====
FE_READ_SIGNAL_STRENGTH
.. attention:: This ioctl is deprecated.
Synopsis
========
.. c:function:: int ioctl( int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength)
:name: FE_READ_SIGNAL_STRENGTH
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <dvb-fe-open>`.
``strength``
The signal strength value is stored into \*strength.
Description
===========
This ioctl call returns the signal strength value for the signal
currently received by the front-end. For this command, read-only access
to the device is sufficient.
Return Value
============
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
|
