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5377d91f MH |
1 | .. -*- coding: utf-8; mode: rst -*- |
2 | ||
3 | .. _FE_GET_EVENT: | |
4 | ||
5 | ************ | |
6 | FE_GET_EVENT | |
7 | ************ | |
8 | ||
15e7d615 | 9 | Name |
586027ce | 10 | ==== |
5377d91f | 11 | |
586027ce | 12 | FE_GET_EVENT |
5377d91f | 13 | |
15e7d615 MCC |
14 | |
15 | Synopsis | |
586027ce | 16 | ======== |
5377d91f | 17 | |
e3a54ab8 | 18 | .. c:function:: int ioctl(int fd, int request = QPSK_GET_EVENT, struct dvb_frontend_event *ev) |
5377d91f | 19 | |
5377d91f | 20 | |
15e7d615 | 21 | Arguments |
586027ce | 22 | ========= |
5377d91f MH |
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 | - int request | |
38 | ||
7347081e | 39 | - Equals :ref:`FE_GET_EVENT` for this command. |
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40 | |
41 | - .. row 3 | |
42 | ||
5d2b3f12 | 43 | - struct dvb_frontend_event \*ev |
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44 | |
45 | - Points to the location where the event, | |
46 | ||
47 | - .. row 4 | |
48 | ||
0579e6e3 | 49 | - |
5377d91f MH |
50 | - if any, is to be stored. |
51 | ||
52 | ||
15e7d615 | 53 | Description |
586027ce MCC |
54 | =========== |
55 | ||
56 | This ioctl call returns a frontend event if available. If an event is | |
57 | not available, the behavior depends on whether the device is in blocking | |
58 | or non-blocking mode. In the latter case, the call fails immediately | |
59 | with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until | |
60 | an event becomes available. | |
61 | ||
62 | ||
15e7d615 | 63 | Return Value |
586027ce | 64 | ============ |
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65 | |
66 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
67 | appropriately. The generic error codes are described at the | |
68 | :ref:`Generic Error Codes <gen-errors>` chapter. | |
69 | ||
70 | ||
71 | ||
72 | .. flat-table:: | |
73 | :header-rows: 0 | |
74 | :stub-columns: 0 | |
75 | ||
76 | ||
77 | - .. row 1 | |
78 | ||
cdb4af0f | 79 | - ``EWOULDBLOCK`` |
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80 | |
81 | - There is no event pending, and the device is in non-blocking mode. | |
82 | ||
83 | - .. row 2 | |
84 | ||
cdb4af0f | 85 | - ``EOVERFLOW`` |
5377d91f MH |
86 | |
87 | - Overflow in event queue - one or more events were lost. |