60 lines
1.2 KiB
ReStructuredText
60 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/media/uapi/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_MSG:
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==========
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CA_GET_MSG
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==========
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Name
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----
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CA_GET_MSG
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Synopsis
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--------
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.. c:function:: int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)
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:name: CA_GET_MSG
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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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``msg``
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Pointer to struct :c:type:`ca_msg`.
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Description
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-----------
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Receives a message via a CI CA module.
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.. note::
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Please notice that, on most drivers, this is done by reading from
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the /dev/adapter?/ca? device node.
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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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Generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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