.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.fe

.. _FE_GET_INFO:

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ioctl FE_GET_INFO

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Name

FE_GET_INFO - Query Digital TV frontend capabilities and returns information about the - front-end. This call only requires read-only access to the device.

Synopsis

.. c:macro:: FE_GET_INFO

int ioctl(int fd, FE_GET_INFO, struct dvb_frontend_info *argp)

Arguments

fd File descriptor returned by :c:func:open().

argp pointer to struct :c:type:dvb_frontend_info

Description

All Digital TV frontend devices support the :ref:FE_GET_INFO ioctl. It is used to identify kernel devices compatible with this specification and to obtain information about driver and hardware capabilities. The ioctl takes a pointer to dvb_frontend_info which is filled by the driver. When the driver is not compatible with this specification the ioctl returns an error.

frontend capabilities

Capabilities describe what a frontend can do. Some capabilities are supported only on some specific frontend types.

The frontend capabilities are described at :c:type:fe_caps.

Return Value

On success 0 is returned.

On error -1 is returned, and the errno variable is set appropriately.

Generic error codes are described at the :ref:Generic Error Codes <gen-errors> chapter.