int ioctl(int fd, int request = FE_GET_FRONTEND, struct dvb_frontend_parameters *p) Arguments

int fd File descriptor returned by a previous call to open().
int request Equals FE_SET_FRONTEND for this command.
struct dvb_frontend_parameters *p Points to parameters for tuning operation. Description

This ioctl call queries the currently effective frontend parameters. 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 Generic Error Codes chapter.

EINVAL Maximum supported symbol rate reached.