This ioctl is deprecated.
int ioctl(int fd, FE_READ_SNR, int16_t *snr)
File descriptor returned by
The signal-to-noise ratio is stored into *snr.
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.
22.214.171.124.5. Return Value¶
On success 0 is returned.
On error -1 is returned, and the
errno variable is set
Generic error codes are described at the Generic Error Codes chapter.