projects / deliverable / linux.git / blame
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|---|---|---|
| 47d23e36 MCC |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _dmx_fwrite: | |
| 4 | ||
| 586027ce | 5 | ================= |
| 47d23e36 MCC |
6 | DVB demux write() |
| 7 | ================= | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ---- |
| 47d23e36 | 11 | |
| 586027ce | 12 | DVB demux write() |
| 47d23e36 | 13 | |
| 15e7d615 MCC |
14 | |
| 15 | Synopsis | |
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16 | -------- |
| 17 | ||
| 1b81f010 | 18 | .. c:function:: ssize_t write(int fd, const void *buf, size_t count) |
| cf8076c3 | 19 | :name: dvb-dmx-write |
| 47d23e36 | 20 | |
| 15e7d615 | 21 | Arguments |
| 586027ce | 22 | --------- |
| 47d23e36 | 23 | |
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24 | ``fd`` |
| 25 | File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. | |
| 47d23e36 | 26 | |
| cf8076c3 MCC |
27 | ``buf`` |
| 28 | Buffer with data to be written | |
| 47d23e36 | 29 | |
| cf8076c3 MCC |
30 | ``count`` |
| 31 | Number of bytes at the buffer | |
| 47d23e36 | 32 | |
| 15e7d615 | 33 | Description |
| 586027ce | 34 | ----------- |
| 47d23e36 | 35 | |
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36 | This system call is only provided by the logical device |
| 37 | /dev/dvb/adapter0/dvr0, associated with the physical demux device that | |
| 38 | provides the actual DVR functionality. It is used for replay of a | |
| 39 | digitally recorded Transport Stream. Matching filters have to be defined | |
| 40 | in the corresponding physical demux device, /dev/dvb/adapter0/demux0. | |
| 41 | The amount of data to be transferred is implied by count. | |
| 47d23e36 MCC |
42 | |
| 43 | ||
| 15e7d615 | 44 | Return Value |
| 586027ce MCC |
45 | ------------ |
| 46 | ||
| 16dac354 MCC |
47 | .. tabularcolumns:: |p{2.5cm}|p{15.0cm}| |
| 48 | ||
| 47d23e36 MCC |
49 | .. flat-table:: |
| 50 | :header-rows: 0 | |
| 51 | :stub-columns: 0 | |
| 52 | ||
| 47d23e36 MCC |
53 | - .. row 1 |
| 54 | ||
| 55 | - ``EWOULDBLOCK`` | |
| 56 | ||
| 57 | - No data was written. This might happen if O_NONBLOCK was | |
| 58 | specified and there is no more buffer space available (if | |
| 59 | O_NONBLOCK is not specified the function will block until buffer | |
| 60 | space is available). | |
| 61 | ||
| 62 | - .. row 2 | |
| 63 | ||
| 64 | - ``EBUSY`` | |
| 65 | ||
| 66 | - This error code indicates that there are conflicting requests. The | |
| 67 | corresponding demux device is setup to receive data from the | |
| 68 | front- end. Make sure that these filters are stopped and that the | |
| 69 | filters with input set to DMX_IN_DVR are started. | |
| 70 | ||
| 71 | - .. row 3 | |
| 72 | ||
| 73 | - ``EBADF`` | |
| 74 | ||
| 75 | - fd is not a valid open file descriptor. |