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There are several issues on the return value for ioctls: - Text is confusing; - Some error codes don't exist; - The non-generic error codes should come before the text that points to the generic error codes; - Tables don't contain column size hints; - Some references are not marked as such. Correct them. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
51 lines
830 B
ReStructuredText
51 lines
830 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.
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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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