projects / deliverable / linux.git / blame
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1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
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3 | .. _NET_GET_IF: |
| 4 | ||
| 5 | **************** | |
| 6 | ioctl NET_GET_IF | |
| 7 | **************** | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ==== |
| 47d23e36 | 11 | |
| 586027ce | 12 | NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`. |
| 47d23e36 | 13 | |
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14 | |
| 15 | Synopsis | |
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16 | ======== |
| 17 | ||
| 18 | .. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if ) | |
| 19 | ||
| 586027ce | 20 | |
| 15e7d615 | 21 | Arguments |
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22 | ========= |
| 23 | ||
| 24 | ``fd`` | |
| 25 | File descriptor returned by :ref:`open() <frontend_f_open>`. | |
| 26 | ||
| 27 | ``request`` | |
| 28 | FE_SET_TONE | |
| 29 | ||
| 30 | ``net_if`` | |
| 31 | pointer to struct :ref:`dvb_net_if <dvb-net-if>` | |
| 32 | ||
| 33 | ||
| 15e7d615 | 34 | Description |
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35 | =========== |
| 36 | ||
| 37 | The NET_GET_IF ioctl uses the interface number given by the struct | |
| 38 | :ref:`dvb_net_if <dvb-net-if>`::ifnum field and fills the content of | |
| 39 | struct :ref:`dvb_net_if <dvb-net-if>` with the packet ID and | |
| 40 | encapsulation type used on such interface. If the interface was not | |
| 41 | created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill | |
| 42 | the ``errno`` with ``EINVAL`` error code. | |
| 43 | ||
| 586027ce | 44 | |
| 15e7d615 | 45 | Return Value |
| 586027ce | 46 | ============ |
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47 | |
| 48 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 49 | appropriately. The generic error codes are described at the | |
| 50 | :ref:`Generic Error Codes <gen-errors>` chapter. |