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