FE_READ_SNR
DESCRIPTION
This ioctl call returns the signal-to-noise ratio for the signal currently received by the front-end. For this command, read-only access to the device is sufficient.
SYNOPSIS
int ioctl(int fd, int request = :ref:`FE_READ_SNR`, uint16_t *snr);
PARAMETERS
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 <gen-errors>` chapter.