2.6.2.2. FE_READ_SNR

2.6.2.2.1. Name

FE_READ_SNR

2.6.2.2.2. Synopsis

int ioctl(int fd, int request=FE_READ_SNR, int16_t* snr)

2.6.2.2.3. Arguments

int fd	File descriptor returned by a previous call to open().
int request	Equals FE_READ_SNR for this command.
uint16_t *snr	The signal-to-noise ratio is stored into *snr.

2.6.2.2.4. 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.

2.6.2.2.5. 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 Generic Error Codes chapter.