projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| 47d23e36 MCC |
16 | -------- |
| 17 | ||
| 5929cb17 | 18 | .. cpp:function:: ssize_t write(int fd, const void *buf, size_t count) |
| 47d23e36 | 19 | |
| 47d23e36 | 20 | |
| 15e7d615 | 21 | Arguments |
| 586027ce | 22 | --------- |
| 47d23e36 MCC |
23 | |
| 24 | .. flat-table:: | |
| 25 | :header-rows: 0 | |
| 26 | :stub-columns: 0 | |
| 27 | ||
| 28 | ||
| 29 | - .. row 1 | |
| 30 | ||
| 31 | - int fd | |
| 32 | ||
| 33 | - File descriptor returned by a previous call to open(). | |
| 34 | ||
| 35 | - .. row 2 | |
| 36 | ||
| 37 | - void \*buf | |
| 38 | ||
| 39 | - Pointer to the buffer containing the Transport Stream. | |
| 40 | ||
| 41 | - .. row 3 | |
| 42 | ||
| 43 | - size_t count | |
| 44 | ||
| 45 | - Size of buf. | |
| 46 | ||
| 47 | ||
| 15e7d615 | 48 | Description |
| 586027ce | 49 | ----------- |
| 47d23e36 | 50 | |
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51 | This system call is only provided by the logical device |
| 52 | /dev/dvb/adapter0/dvr0, associated with the physical demux device that | |
| 53 | provides the actual DVR functionality. It is used for replay of a | |
| 54 | digitally recorded Transport Stream. Matching filters have to be defined | |
| 55 | in the corresponding physical demux device, /dev/dvb/adapter0/demux0. | |
| 56 | The amount of data to be transferred is implied by count. | |
| 47d23e36 MCC |
57 | |
| 58 | ||
| 15e7d615 | 59 | Return Value |
| 586027ce MCC |
60 | ------------ |
| 61 | ||
| 47d23e36 MCC |
62 | .. flat-table:: |
| 63 | :header-rows: 0 | |
| 64 | :stub-columns: 0 | |
| 65 | ||
| 66 | ||
| 67 | - .. row 1 | |
| 68 | ||
| 69 | - ``EWOULDBLOCK`` | |
| 70 | ||
| 71 | - No data was written. This might happen if O_NONBLOCK was | |
| 72 | specified and there is no more buffer space available (if | |
| 73 | O_NONBLOCK is not specified the function will block until buffer | |
| 74 | space is available). | |
| 75 | ||
| 76 | - .. row 2 | |
| 77 | ||
| 78 | - ``EBUSY`` | |
| 79 | ||
| 80 | - This error code indicates that there are conflicting requests. The | |
| 81 | corresponding demux device is setup to receive data from the | |
| 82 | front- end. Make sure that these filters are stopped and that the | |
| 83 | filters with input set to DMX_IN_DVR are started. | |
| 84 | ||
| 85 | - .. row 3 | |
| 86 | ||
| 87 | - ``EBADF`` | |
| 88 | ||
| 89 | - fd is not a valid open file descriptor. |