video-get-status.rst 965 字节
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.. -*- coding: utf-8; mode: rst -*-

.. _VIDEO_GET_STATUS:

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================
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VIDEO_GET_STATUS
================

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Name
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----
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VIDEO_GET_STATUS
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Synopsis
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--------

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.. cpp:function:: int ioctl(fd, int request = VIDEO_GET_STATUS, struct video_status *status)
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Arguments
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---------
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    -  .. row 1

       -  int fd

       -  File descriptor returned by a previous call to open().

    -  .. row 2

       -  int request

       -  Equals VIDEO_GET_STATUS for this command.

    -  .. row 3

       -  struct video_status \*status

       -  Returns the current status of the Video Device.


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Description
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-----------

This ioctl call asks the Video Device to return the current status of
the device.


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Return Value
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------------

On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.