_IOC_SIZEMASK      37 src/runtime/android_ioctl.h #define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
_IOC_SIZEMASK      42 src/runtime/android_ioctl.h #define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)