1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun.. c:namespace:: DTV.fe 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun.. _FE_GET_FRONTEND: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun*************** 7*4882a593SmuzhiyunFE_GET_FRONTEND 8*4882a593Smuzhiyun*************** 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunName 11*4882a593Smuzhiyun==== 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunFE_GET_FRONTEND 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun.. attention:: This ioctl is deprecated. 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunSynopsis 18*4882a593Smuzhiyun======== 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun.. c:macro:: FE_GET_FRONTEND 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun``int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)`` 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunArguments 25*4882a593Smuzhiyun========= 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun``fd`` 28*4882a593Smuzhiyun File descriptor returned by :c:func:`open()`. 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun``p`` 31*4882a593Smuzhiyun Points to parameters for tuning operation. 32*4882a593Smuzhiyun 33*4882a593SmuzhiyunDescription 34*4882a593Smuzhiyun=========== 35*4882a593Smuzhiyun 36*4882a593SmuzhiyunThis ioctl call queries the currently effective frontend parameters. For 37*4882a593Smuzhiyunthis command, read-only access to the device is sufficient. 38*4882a593Smuzhiyun 39*4882a593SmuzhiyunReturn Value 40*4882a593Smuzhiyun============ 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunOn success 0 is returned. 43*4882a593Smuzhiyun 44*4882a593SmuzhiyunOn error -1 is returned, and the ``errno`` variable is set 45*4882a593Smuzhiyunappropriately. 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun.. flat-table:: 48*4882a593Smuzhiyun :header-rows: 0 49*4882a593Smuzhiyun :stub-columns: 0 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun - .. row 1 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun - ``EINVAL`` 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun - Maximum supported symbol rate reached. 56*4882a593Smuzhiyun 57*4882a593SmuzhiyunGeneric error codes are described at the 58*4882a593Smuzhiyun:ref:`Generic Error Codes <gen-errors>` chapter. 59