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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>
57 lines
1.2 KiB
ReStructuredText
57 lines
1.2 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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.. _func-close:
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************
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V4L2 close()
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************
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Name
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====
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v4l2-close - Close a V4L2 device
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Synopsis
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========
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.. code-block:: c
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#include <unistd.h>
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.. c:function:: int close( int fd )
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:name: v4l2-close
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <func-open>`.
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Description
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===========
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Closes the device. Any I/O in progress is terminated and resources
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associated with the file descriptor are freed. However data format
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parameters, current input or output, control values or other properties
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remain unchanged.
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Return Value
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============
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The function returns 0 on success, -1 on failure and the ``errno`` is
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set appropriately. Possible error codes:
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EBADF
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``fd`` is not a valid open file descriptor.
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