.. -*- coding: utf-8; mode: rst -*- .. _FE_READ_SIGNAL_STRENGTH: *********************** FE_READ_SIGNAL_STRENGTH *********************** Name ==== FE_READ_SIGNAL_STRENGTH .. attention:: This ioctl is deprecated. Synopsis ======== .. c:function:: int ioctl( int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength) :name: FE_READ_SIGNAL_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 and the ``errno`` variable is set appropriately. The generic error codes are described at the :ref:`Generic Error Codes ` chapter.