.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.ca .. _CA_SET_DESCR: ============ CA_SET_DESCR ============ Name ---- CA_SET_DESCR Synopsis -------- .. c:macro:: CA_SET_DESCR ``int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)`` Arguments --------- ``fd`` File descriptor returned by a previous call to :c:func:`open()`. ``msg`` Pointer to struct :c:type:`ca_descr`. Description ----------- CA_SET_DESCR is used for feeding descrambler CA slots with descrambling keys (referred as control words). Return Value ------------ On success 0 is returned. On error -1 is returned, and the ``errno`` variable is set appropriately. Generic error codes are described at the :ref:`Generic Error Codes ` chapter.