Documentation/media/uapi/dvb/fe-get-event.rst

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.. 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/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _FE_GET_EVENT:

************
FE_GET_EVENT
************

Name
====

FE_GET_EVENT

.. attention:: This ioctl is deprecated.


Synopsis
========

.. c:function:: int  ioctl(int fd, FE_GET_EVENT, struct dvb_frontend_event *ev)
    :name: FE_GET_EVENT


Arguments
=========

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

``ev``
    Points to the location where the event, if any, is to be stored.


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

This ioctl call returns a frontend event if available. If an event is
not available, the behavior depends on whether the device is in blocking
or non-blocking mode. In the latter case, the call fails immediately
with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until
an event becomes available.


Return Value
============

On success 0 is returned.

On error -1 is returned, and the ``errno`` variable is set
appropriately.


.. flat-table::
    :header-rows:  0
    :stub-columns: 0


    -  .. row 1

       -  ``EWOULDBLOCK``

       -  There is no event pending, and the device is in non-blocking mode.

    -  .. row 2

       -  ``EOVERFLOW``

       -  Overflow in event queue - one or more events were lost.

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