| .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
| |
| .. _FE_GET_FRONTEND: |
| |
| *************** |
| FE_GET_FRONTEND |
| *************** |
| |
| Name |
| ==== |
| |
| FE_GET_FRONTEND |
| |
| .. attention:: This ioctl is deprecated. |
| |
| |
| Synopsis |
| ======== |
| |
| .. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p) |
| :name: FE_GET_FRONTEND |
| |
| |
| Arguments |
| ========= |
| |
| ``fd`` |
| File descriptor returned by :c:func:`open() <dvb-fe-open>`. |
| |
| |
| ``p`` |
| Points to parameters for tuning operation. |
| |
| |
| Description |
| =========== |
| |
| This ioctl call queries the currently effective frontend parameters. For |
| this command, read-only access to the device is sufficient. |
| |
| |
| Return Value |
| ============ |
| |
| On success 0 is returned. |
| |
| On error -1 is returned, and the ``errno`` variable is set |
| appropriately. |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - ``EINVAL`` |
| |
| - Maximum supported symbol rate reached. |
| |
| Generic error codes are described at the |
| :ref:`Generic Error Codes <gen-errors>` chapter. |
