FE_GET_FRONTEND.rst

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

.. _FE_GET_FRONTEND:

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

DESCRIPTION

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

SYNOPSIS

int ioctl(int fd, int request =
:ref:`FE_GET_FRONTEND <FE_GET_FRONTEND>`, struct
dvb_frontend_parameters *p);

PARAMETERS



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


    -  .. row 1

       -  int fd

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

    -  .. row 2

       -  int request

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

    -  .. row 3

       -  struct dvb_frontend_parameters *p

       -  Points to parameters for tuning operation.


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.



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


    -  .. row 1

       -  EINVAL

       -  Maximum supported symbol rate reached.




.. ------------------------------------------------------------------------------
.. This file was automatically converted from DocBook-XML with the dbxml
.. library (https://github.com/return42/sphkerneldoc). The origin XML comes
.. from the linux kernel, refer to:
..
.. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook
.. ------------------------------------------------------------------------------