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60c2820d0f
The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
50 lines
1.1 KiB
ReStructuredText
50 lines
1.1 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _NET_GET_IF:
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****************
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ioctl NET_GET_IF
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****************
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Name
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====
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NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`.
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Synopsis
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========
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.. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <frontend_f_open>`.
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``request``
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FE_SET_TONE
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``net_if``
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pointer to struct :ref:`dvb_net_if <dvb-net-if>`
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Description
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===========
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The NET_GET_IF ioctl uses the interface number given by the struct
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:ref:`dvb_net_if <dvb-net-if>`::ifnum field and fills the content of
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struct :ref:`dvb_net_if <dvb-net-if>` with the packet ID and
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encapsulation type used on such interface. If the interface was not
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created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill
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the ``errno`` with ``EINVAL`` error code.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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