projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 5377d91f MH |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _FE_GET_FRONTEND: | |
| 4 | ||
| 5 | *************** | |
| 6 | FE_GET_FRONTEND | |
| 7 | *************** | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ==== |
| 5377d91f | 11 | |
| 586027ce | 12 | FE_GET_FRONTEND |
| 5377d91f | 13 | |
| 15e7d615 MCC |
14 | |
| 15 | Synopsis | |
| 586027ce | 16 | ======== |
| 5377d91f | 17 | |
| 5929cb17 | 18 | .. cpp:function:: int ioctl(int fd, int request = FE_GET_FRONTEND, struct dvb_frontend_parameters *p) |
| 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_SET_FRONTEND` for this |
| 0579e6e3 | 40 | command. |
| 5377d91f MH |
41 | |
| 42 | - .. row 3 | |
| 43 | ||
| d090484c | 44 | - struct dvb_frontend_parameters \*p |
| 5377d91f MH |
45 | |
| 46 | - Points to parameters for tuning operation. | |
| 47 | ||
| 48 | ||
| 15e7d615 | 49 | Description |
| 586027ce MCC |
50 | =========== |
| 51 | ||
| 52 | This ioctl call queries the currently effective frontend parameters. For | |
| 53 | this command, read-only access to the device is sufficient. | |
| 54 | ||
| 55 | ||
| 15e7d615 | 56 | Return Value |
| 586027ce | 57 | ============ |
| 5377d91f MH |
58 | |
| 59 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 60 | appropriately. The generic error codes are described at the | |
| 61 | :ref:`Generic Error Codes <gen-errors>` chapter. | |
| 62 | ||
| 63 | ||
| 64 | ||
| 65 | .. flat-table:: | |
| 66 | :header-rows: 0 | |
| 67 | :stub-columns: 0 | |
| 68 | ||
| 69 | ||
| 70 | - .. row 1 | |
| 71 | ||
| cdb4af0f | 72 | - ``EINVAL`` |
| 5377d91f MH |
73 | |
| 74 | - Maximum supported symbol rate reached. |