Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst

Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst

File Facts

System
Linux kernel
Corpus path
Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst
Extension
.rst
Size
1129 bytes
Lines
54
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: DTV.fe

.. _FE_DISHNETWORK_SEND_LEGACY_CMD:

******************************
FE_DISHNETWORK_SEND_LEGACY_CMD
******************************

Name
====

FE_DISHNETWORK_SEND_LEGACY_CMD

Synopsis
========

.. c:macro:: FE_DISHNETWORK_SEND_LEGACY_CMD

``int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)``

Arguments
=========

``fd``
    File descriptor returned by :c:func:`open()`.

``cmd``
    Sends the specified raw cmd to the dish via DISEqC.

Description
===========

.. warning::
   This is a very obscure legacy command, used only at stv0299
   driver. Should not be used on newer drivers.

It provides a non-standard method for selecting Diseqc voltage on the
frontend, for Dish Network legacy switches.

As support for this ioctl were added in 2004, this means that such
dishes were already legacy in 2004.

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.

Annotation

Implementation Notes