xref: /openbmc/linux/Documentation/userspace-api/media/dvb/frontend_f_close.rst (revision 54f38fca)

.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/userspace-api/media/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _frontend_f_close:

***************************
Digital TV frontend close()
***************************

Name
====

fe-close - Close a frontend device


Synopsis
========

.. code-block:: c

    #include <unistd.h>


.. c:function:: int close( int fd )
    :name: dvb-fe-close

Arguments
=========

``fd``
    File descriptor returned by :c:func:`open() <dvb-fe-open>`.


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

This system call closes a previously opened front-end device. After
closing a front-end device, its corresponding hardware might be powered
down automatically.


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.