IOCPARM_MASK       43 include/sys/ioctl.h #define	IOCPARM_LEN(x)	(((x) >> 16) & IOCPARM_MASK)
IOCPARM_MASK       44 include/sys/ioctl.h #define	IOCBASECMD(x)	((x) & ~(IOCPARM_MASK << 16))
IOCPARM_MASK       60 include/sys/ioctl.h 	(u_long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))