| .. 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 <gen-errors>` chapter. |