1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2.. c:namespace:: DTV.ca 3 4.. _CA_SET_DESCR: 5 6============ 7CA_SET_DESCR 8============ 9 10Name 11---- 12 13CA_SET_DESCR 14 15Synopsis 16-------- 17 18.. c:macro:: CA_SET_DESCR 19 20``int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)`` 21 22Arguments 23--------- 24 25``fd`` 26 File descriptor returned by a previous call to :c:func:`open()`. 27 28``msg`` 29 Pointer to struct :c:type:`ca_descr`. 30 31Description 32----------- 33 34CA_SET_DESCR is used for feeding descrambler CA slots with descrambling 35keys (referred as control words). 36 37Return Value 38------------ 39 40On success 0 is returned. 41 42On error -1 is returned, and the ``errno`` variable is set 43appropriately. 44 45Generic error codes are described at the 46:ref:`Generic Error Codes <gen-errors>` chapter. 47