fe-get-frontend.rst (1009B)
1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2.. c:namespace:: DTV.fe 3 4.. _FE_GET_FRONTEND: 5 6*************** 7FE_GET_FRONTEND 8*************** 9 10Name 11==== 12 13FE_GET_FRONTEND 14 15.. attention:: This ioctl is deprecated. 16 17Synopsis 18======== 19 20.. c:macro:: FE_GET_FRONTEND 21 22``int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)`` 23 24Arguments 25========= 26 27``fd`` 28 File descriptor returned by :c:func:`open()`. 29 30``p`` 31 Points to parameters for tuning operation. 32 33Description 34=========== 35 36This ioctl call queries the currently effective frontend parameters. For 37this command, read-only access to the device is sufficient. 38 39Return Value 40============ 41 42On success 0 is returned. 43 44On error -1 is returned, and the ``errno`` variable is set 45appropriately. 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 57Generic error codes are described at the 58:ref:`Generic Error Codes <gen-errors>` chapter.