forked from Minki/linux
9a721b9b4b
There are several issues on the return value for ioctls: - Text is confusing; - Some error codes don't exist; - The non-generic error codes should come before the text that points to the generic error codes; - Tables don't contain column size hints; - Some references are not marked as such. Correct them. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
63 lines
990 B
ReStructuredText
63 lines
990 B
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_GET_FRONTEND:
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***************
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FE_GET_FRONTEND
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***************
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Name
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====
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FE_GET_FRONTEND
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.. attention:: This ioctl is deprecated.
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Synopsis
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========
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.. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)
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:name: FE_GET_FRONTEND
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Arguments
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=========
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``fd``
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File descriptor returned by :c:func:`open() <dvb-fe-open>`.
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``p``
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Points to parameters for tuning operation.
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Description
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===========
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This ioctl call queries the currently effective frontend parameters. For
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this command, read-only access to the device is sufficient.
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Return Value
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============
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On success 0 is returned.
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On error -1 is returned, and the ``errno`` variable is set
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appropriately.
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- ``EINVAL``
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- Maximum supported symbol rate reached.
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Generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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