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.. -*- coding: utf-8; mode: rst -*-
.. _dmx_fwrite:
=================
DVB demux write()
=================
Name
----
DVB demux write()
Synopsis
--------
.. c:function:: ssize_t write(int fd, const void *buf, size_t count)
:name: dvb-dmx-write
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``buf``
Buffer with data to be written
``count``
Number of bytes at the buffer
Description
-----------
This system call is only provided by the logical device
/dev/dvb/adapter0/dvr0, associated with the physical demux device that
provides the actual DVR functionality. It is used for replay of a
digitally recorded Transport Stream. Matching filters have to be defined
in the corresponding physical demux device, /dev/dvb/adapter0/demux0.
The amount of data to be transferred is implied by count.
Return Value
------------
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- ``EWOULDBLOCK``
- No data was written. This might happen if O_NONBLOCK was
specified and there is no more buffer space available (if
O_NONBLOCK is not specified the function will block until buffer
space is available).
- .. row 2
- ``EBUSY``
- This error code indicates that there are conflicting requests. The
corresponding demux device is setup to receive data from the
front- end. Make sure that these filters are stopped and that the
filters with input set to DMX_IN_DVR are started.
- .. row 3
- ``EBADF``
- fd is not a valid open file descriptor.
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