mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.4 KiB
68 lines
1.4 KiB
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
|
.. c:namespace:: DTV.fe |
|
|
|
.. _FE_SET_FRONTEND: |
|
|
|
*************** |
|
FE_SET_FRONTEND |
|
*************** |
|
|
|
.. attention:: This ioctl is deprecated. |
|
|
|
Name |
|
==== |
|
|
|
FE_SET_FRONTEND |
|
|
|
Synopsis |
|
======== |
|
|
|
.. c:macro:: FE_SET_FRONTEND |
|
|
|
``int ioctl(int fd, FE_SET_FRONTEND, struct dvb_frontend_parameters *p)`` |
|
|
|
Arguments |
|
========= |
|
|
|
``fd`` |
|
File descriptor returned by :c:func:`open()`. |
|
|
|
``p`` |
|
Points to parameters for tuning operation. |
|
|
|
Description |
|
=========== |
|
|
|
This ioctl call starts a tuning operation using specified parameters. |
|
The result of this call will be successful if the parameters were valid |
|
and the tuning could be initiated. The result of the tuning operation in |
|
itself, however, will arrive asynchronously as an event (see |
|
documentation for :ref:`FE_GET_EVENT` and |
|
FrontendEvent.) If a new :ref:`FE_SET_FRONTEND` |
|
operation is initiated before the previous one was completed, the |
|
previous operation will be aborted in favor of the new one. This command |
|
requires read/write access to the device. |
|
|
|
Return Value |
|
============ |
|
|
|
On success 0 is returned. |
|
|
|
On error -1 is returned, and the ``errno`` variable is set |
|
appropriately. |
|
|
|
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| |
|
|
|
.. flat-table:: |
|
:header-rows: 0 |
|
:stub-columns: 0 |
|
:widths: 1 16 |
|
|
|
- .. row 1 |
|
|
|
- ``EINVAL`` |
|
|
|
- Maximum supported symbol rate reached. |
|
|
|
Generic error codes are described at the |
|
:ref:`Generic Error Codes <gen-errors>` chapter.
|
|
|