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54f38fcae5
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").
As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.
Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
60 lines
1.5 KiB
ReStructuredText
60 lines
1.5 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/userspace-api/media/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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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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.. c:function:: int ioctl( int fd, NET_GET_IF, struct dvb_net_if *net_if )
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:name: NET_GET_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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``net_if``
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pointer to struct :c:type:`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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:c:type:`dvb_net_if`::ifnum field and fills the content of
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struct :c:type:`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, and :c:type:`ca_slot_info` is filled.
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On error -1 is returned, and the ``errno`` variable is set
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appropriately.
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The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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