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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>
50 lines
1.2 KiB
ReStructuredText
50 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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.. _CA_GET_DESCR_INFO:
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=================
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CA_GET_DESCR_INFO
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=================
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Name
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----
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CA_GET_DESCR_INFO
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Synopsis
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--------
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.. c:function:: int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)
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:name: CA_GET_DESCR_INFO
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Arguments
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---------
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``fd``
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File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
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``desc``
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Pointer to struct :c:type:`ca_descr_info`.
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Description
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-----------
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Returns information about all descrambler slots.
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Return Value
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------------
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On success 0 is returned, and :c:type:`ca_descr_info` is filled.
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On error -1 is returned, 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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