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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_GET_CAP:
+
+==========
+CA_GET_CAP
+==========
+
+Name
+----
+
+CA_GET_CAP
+
+Synopsis
+--------
+
+.. c:macro:: CA_GET_CAP
+
+``int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)``
+
+Arguments
+---------
+
+``fd``
+ File descriptor returned by a previous call to :c:func:`open()`.
+
+``caps``
+ Pointer to struct :c:type:`ca_caps`.
+
+Description
+-----------
+
+Queries the Kernel for information about the available CA and descrambler
+slots, and their types.
+
+Return Value
+------------
+
+On success 0 is returned and :c:type:`ca_caps` 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.