EVIOCGRAB
case (EVIOCGRAB & ~IOC_DIRMASK) | IOC_IN:
args->cmd = EVIOCGRAB;
case EVIOCGRAB:
error = ioctl(sc->vsc_fd, EVIOCGRAB, 1);
if (qvalid && grab && ioctl(fd, EVIOCGRAB, 1) == -1) {