_IOC               61 include/sys/ioctl.h #define	_IO(g,n)	_IOC(IOC_VOID,	(g), (n), 0)
_IOC               62 include/sys/ioctl.h #define	_IOR(g,n,t)	_IOC(IOC_OUT,	(g), (n), sizeof(t))
_IOC               63 include/sys/ioctl.h #define	_IOW(g,n,t)	_IOC(IOC_IN,	(g), (n), sizeof(t))
_IOC               65 include/sys/ioctl.h #define	_IOWR(g,n,t)	_IOC(IOC_INOUT,	(g), (n), sizeof(t))
_IOC               67 include/sys/ioctl.h #define	_IORN(g,n,t)	_IOC((IOC_OVAL|IOC_OUT), (g), (n), sizeof(t))
_IOC               68 include/sys/ioctl.h #define	_IOWN(g,n,t)	_IOC((IOC_IVAL|IOC_IN),  (g), (n), sizeof(t))