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

.. _FE_READ_SIGNAL_STRENGTH:

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FE_READ_SIGNAL_STRENGTH

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Name

FE_READ_SIGNAL_STRENGTH

.. attention:: This ioctl is deprecated.

Synopsis

.. c:macro:: FE_READ_SIGNAL_STRENGTH

int ioctl(int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength)

Arguments

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

strength The signal strength value is stored into *strength.

Description

This ioctl call returns the signal strength value for the signal currently received by the front-end. For this command, read-only access to the device is sufficient.

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.