2.6.2.3. FE_READ_SIGNAL_STRENGTH¶
2.6.2.3.2. Synopsis¶
- int ioctl(int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength)¶
2.6.2.3.3. Arguments¶
- fd
- File descriptor returned by open().
- strength
- The signal strength value is stored into *strength.
2.6.2.3.4. Description¶
This ioctl call returns the signal strength value for the signal currently received by the front-end. For this command, read-only access to the device is sufficient.
2.6.2.3.5. 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.