2.4.3. ioctl FE_GET_INFO¶
2.4.3.1. Name¶
FE_GET_INFO - Query Digital TV frontend capabilities and returns information about the - front-end. This call only requires read-only access to the device.
2.4.3.3. Arguments¶
fd- File descriptor returned by
open(). argp- pointer to struct
dvb_frontend_info
2.4.3.4. Description¶
All Digital TV frontend devices support the ioctl FE_GET_INFO ioctl. It is used to identify kernel devices compatible with this specification and to obtain information about driver and hardware capabilities. The ioctl takes a pointer to dvb_frontend_info which is filled by the driver. When the driver is not compatible with this specification the ioctl returns an error.
2.4.3.5. frontend capabilities¶
Capabilities describe what a frontend can do. Some capabilities are supported only on some specific frontend types.
The frontend capabilities are described at fe_caps.
2.4.3.6. Return Value¶
On success 0 is returned.
On error -1 is returned, and the errno variable is set
appropriately.
Generic error codes are described at the Generic Error Codes chapter.