sys/sys/ioccom.h
62
#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
sys/sys/ioccom.h
63
#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
sys/sys/ioccom.h
64
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
sys/sys/ioccom.h
66
#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
