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1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later2.. c:namespace:: DTV.ca3 4.. _CA_GET_MSG:5 6==========7CA_GET_MSG8==========9 10Name11----12 13CA_GET_MSG14 15Synopsis16--------17 18.. c:macro:: CA_GET_MSG19 20``int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)``21 22Arguments23---------24 25``fd``26 File descriptor returned by a previous call to :c:func:`open()`.27 28``msg``29 Pointer to struct :c:type:`ca_msg`.30 31Description32-----------33 34Receives a message via a CI CA module.35 36.. note::37 38 Please notice that, on most drivers, this is done by reading from39 the /dev/adapter?/ca? device node.40 41Return Value42------------43 44On success 0 is returned.45 46On error -1 is returned, and the ``errno`` variable is set47appropriately.48 49Generic error codes are described at the50:ref:`Generic Error Codes <gen-errors>` chapter.51