Documentation/userspace-api/media/dvb/dmx-start.rst

Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/dvb/dmx-start.rst

File Facts

System
Linux kernel
Corpus path
Documentation/userspace-api/media/dvb/dmx-start.rst
Extension
.rst
Size
1239 bytes
Lines
66
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.dmx

.. _DMX_START:

=========
DMX_START
=========

Name
----

DMX_START

Synopsis
--------

.. c:macro:: DMX_START

``int ioctl(int fd, DMX_START)``

Arguments
---------

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

Description
-----------

This ioctl call is used to start the actual filtering operation defined
via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`.

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

    -  .. row 1

       -  ``EINVAL``

       -  Invalid argument, i.e. no filtering parameters provided via the
	  :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls.

    -  .. row 2

       -  ``EBUSY``

       -  This error code indicates that there are conflicting requests.
	  There are active filters filtering data from another input source.
	  Make sure that these filters are stopped before starting this
	  filter.

The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.

Annotation

Implementation Notes