1059b1c5bSMauro Carvalho Chehab.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 254f38fcaSMauro Carvalho Chehab 354f38fcaSMauro Carvalho Chehab.. _CA_SET_DESCR: 454f38fcaSMauro Carvalho Chehab 554f38fcaSMauro Carvalho Chehab============ 654f38fcaSMauro Carvalho ChehabCA_SET_DESCR 754f38fcaSMauro Carvalho Chehab============ 854f38fcaSMauro Carvalho Chehab 954f38fcaSMauro Carvalho ChehabName 1054f38fcaSMauro Carvalho Chehab---- 1154f38fcaSMauro Carvalho Chehab 1254f38fcaSMauro Carvalho ChehabCA_SET_DESCR 1354f38fcaSMauro Carvalho Chehab 1454f38fcaSMauro Carvalho Chehab 1554f38fcaSMauro Carvalho ChehabSynopsis 1654f38fcaSMauro Carvalho Chehab-------- 1754f38fcaSMauro Carvalho Chehab 1854f38fcaSMauro Carvalho Chehab.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc) 1954f38fcaSMauro Carvalho Chehab :name: CA_SET_DESCR 2054f38fcaSMauro Carvalho Chehab 2154f38fcaSMauro Carvalho Chehab 2254f38fcaSMauro Carvalho ChehabArguments 2354f38fcaSMauro Carvalho Chehab--------- 2454f38fcaSMauro Carvalho Chehab 2554f38fcaSMauro Carvalho Chehab``fd`` 2654f38fcaSMauro Carvalho Chehab File descriptor returned by a previous call to :c:func:`open() <cec-open>`. 2754f38fcaSMauro Carvalho Chehab 2854f38fcaSMauro Carvalho Chehab``msg`` 2954f38fcaSMauro Carvalho Chehab Pointer to struct :c:type:`ca_descr`. 3054f38fcaSMauro Carvalho Chehab 3154f38fcaSMauro Carvalho ChehabDescription 3254f38fcaSMauro Carvalho Chehab----------- 3354f38fcaSMauro Carvalho Chehab 3454f38fcaSMauro Carvalho ChehabCA_SET_DESCR is used for feeding descrambler CA slots with descrambling 3554f38fcaSMauro Carvalho Chehabkeys (referred as control words). 3654f38fcaSMauro Carvalho Chehab 3754f38fcaSMauro Carvalho ChehabReturn Value 3854f38fcaSMauro Carvalho Chehab------------ 3954f38fcaSMauro Carvalho Chehab 4054f38fcaSMauro Carvalho ChehabOn success 0 is returned. 4154f38fcaSMauro Carvalho Chehab 4254f38fcaSMauro Carvalho ChehabOn error -1 is returned, and the ``errno`` variable is set 4354f38fcaSMauro Carvalho Chehabappropriately. 4454f38fcaSMauro Carvalho Chehab 4554f38fcaSMauro Carvalho ChehabGeneric error codes are described at the 4654f38fcaSMauro Carvalho Chehab:ref:`Generic Error Codes <gen-errors>` chapter. 47