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Diffstat (limited to 'Documentation/media/uapi/dvb/dmx-fwrite.rst')
| -rw-r--r-- | Documentation/media/uapi/dvb/dmx-fwrite.rst | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-fwrite.rst b/Documentation/media/uapi/dvb/dmx-fwrite.rst index 8a90dfe28307..519e5733e53b 100644 --- a/Documentation/media/uapi/dvb/dmx-fwrite.rst +++ b/Documentation/media/uapi/dvb/dmx-fwrite.rst @@ -2,14 +2,14 @@ .. _dmx_fwrite: -================= -DVB demux write() -================= +======================== +Digital TV demux write() +======================== Name ---- -DVB demux write() +Digital TV demux write() Synopsis @@ -34,42 +34,39 @@ Description ----------- This system call is only provided by the logical device -/dev/dvb/adapter0/dvr0, associated with the physical demux device that +``/dev/dvb/adapter?/dvr?``, 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. +in the corresponding physical demux device, ``/dev/dvb/adapter?/demux?``. The amount of data to be transferred is implied by count. Return Value ------------ +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + .. tabularcolumns:: |p{2.5cm}|p{15.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 + :widths: 1 16 - - .. row 1 - - - ``EWOULDBLOCK`` - - - No data was written. This might happen if O_NONBLOCK was + - - ``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 + ``O_NONBLOCK`` is not specified the function will block until buffer space is available). - - .. row 2 - - - ``EBUSY`` - + - - ``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`` + filters with input set to ``DMX_IN_DVR`` are started. - - fd is not a valid open file descriptor. +The generic error codes are described at the +:ref:`Generic Error Codes <gen-errors>` chapter. |