1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 .. c:namespace:: DTV.fe 3 4 .. _FE_GET_FRONTEND: 5 6 *************** 7 FE_GET_FRONTEND 8 *************** 9 10 Name 11 ==== 12 13 FE_GET_FRONTEND 14 15 .. attention:: This ioctl is deprecated. 16 17 Synopsis 18 ======== 19 20 .. c:macro:: FE_GET_FRONTEND 21 22 ``int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)`` 23 24 Arguments 25 ========= 26 27 ``fd`` 28 File descriptor returned by :c:func:`open()`. 29 30 ``p`` 31 Points to parameters for tuning operation. 32 33 Description 34 =========== 35 36 This ioctl call queries the currently effective frontend parameters. For 37 this command, read-only access to the device is sufficient. 38 39 Return Value 40 ============ 41 42 On success 0 is returned. 43 44 On error -1 is returned, and the ``errno`` variable is set 45 appropriately. 46 47 .. flat-table:: 48 :header-rows: 0 49 :stub-columns: 0 50 51 - .. row 1 52 53 - ``EINVAL`` 54 55 - Maximum supported symbol rate reached. 56 57 Generic error codes are described at the 58 :ref:`Generic Error Codes <gen-errors>` chapter.
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