.. c:namespace:: DTV.ca
CA_GET_DESCR_INFO
.. c:macro:: CA_GET_DESCR_INFO
int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)
fd- File descriptor returned by a previous call to :c:func:`open()`.
desc- Pointer to struct :c:type:`ca_descr_info`.
Returns information about all descrambler slots.
On success 0 is returned, and :c:type:`ca_descr_info` is filled.
On error -1 is returned, and the errno variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.