1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/userspace-api/media/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _CA_GET_DESCR_INFO: 11 12================= 13CA_GET_DESCR_INFO 14================= 15 16Name 17---- 18 19CA_GET_DESCR_INFO 20 21 22Synopsis 23-------- 24 25.. c:function:: int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc) 26 :name: CA_GET_DESCR_INFO 27 28Arguments 29--------- 30 31``fd`` 32 File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. 33 34``desc`` 35 Pointer to struct :c:type:`ca_descr_info`. 36 37Description 38----------- 39 40Returns information about all descrambler slots. 41 42Return Value 43------------ 44 45On success 0 is returned, and :c:type:`ca_descr_info` is filled. 46 47On error -1 is returned, and the ``errno`` variable is set 48appropriately. The generic error codes are described at the 49:ref:`Generic Error Codes <gen-errors>` chapter. 50