FE_GET_FRONTEND.rst

.. -*- coding: utf-8; mode: rst -*-

.. _FE_GET_FRONTEND:

***************
FE_GET_FRONTEND
***************

NAME
====

FE_GET_FRONTEND

SYNOPSIS
========

.. c:function:: int ioctl(int fd, int request = FE_GET_FRONTEND, struct dvb_frontend_parameters *p)


ARGUMENTS
=========

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       -  int fd

       -  File descriptor returned by a previous call to open().

    -  .. row 2

       -  int request

       -  Equals :ref:`FE_SET_FRONTEND` for this
	  command.

    -  .. row 3

       -  struct dvb_frontend_parameters \*p

       -  Points to parameters for tuning operation.


DESCRIPTION
===========

This ioctl call queries the currently effective frontend parameters. For
this command, read-only access to the device is sufficient.


RETURN VALUE
============

On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.



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       -  ``EINVAL``

       -  Maximum supported symbol rate reached.