Need to intercept HID Keyboard events (and then block them)

Question

I\'ve got a RFID USB device that registers as a HID device (A USB Keyboard more or less).

I\'m looking for a way to capture this input, and block/filter it before it

Answer 1

Ungrabbing requires a "false" value parameter, as below:

result = ioctl(fevdev, EVIOCGRAB, 0);