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cf8076c314
Name all ioctl references and make them match the ioctls that are documented. That will improve the cross-reference index, as it will have all ioctls and syscalls there. While here, improve the documentation, marking the deprecated ioctls, and making the non-deprecated ones more like the rest of the media book. Also, add a notice for ioctls that still require documentation. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
47 lines
819 B
ReStructuredText
47 lines
819 B
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_READ_BER:
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***********
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FE_READ_BER
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***********
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Name
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====
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FE_READ_BER
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.. attention:: This ioctl is deprecated.
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Synopsis
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========
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.. c:function:: int ioctl(int fd, FE_READ_BER, uint32_t *ber)
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:name: FE_READ_BER
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Arguments
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=========
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``fd``
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File descriptor returned by :c:func:`open() <dvb-fe-open>`.
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``ber``
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The bit error rate is stored into \*ber.
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Description
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===========
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This ioctl call returns the bit error rate for the signal currently
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received/demodulated by the front-end. For this command, read-only
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access to the device is sufficient.
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Return Value
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============
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On success 0 is returned, on error -1 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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