diff options
Diffstat (limited to 'StdLib/Include/sys/ioccom.h')
| -rw-r--r-- | StdLib/Include/sys/ioccom.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/StdLib/Include/sys/ioccom.h b/StdLib/Include/sys/ioccom.h index 210c9180d7..852a082b28 100644 --- a/StdLib/Include/sys/ioccom.h +++ b/StdLib/Include/sys/ioccom.h @@ -30,7 +30,6 @@ *
* @(#)ioccom.h 8.3 (Berkeley) 1/9/95
*/
-
#ifndef _SYS_IOCCOM_H_
#define _SYS_IOCCOM_H_
@@ -40,6 +39,7 @@ * upper word are used to encode the in/out status of the parameter.
*/
#define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
+
#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
#define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
#define IOCGROUP(x) (((x) >> 8) & 0xff)
@@ -56,11 +56,12 @@ /* mask for IN/OUT/VOID */
#define IOC_DIRMASK (unsigned long)0xe0000000
-#define _IOC(inout,group,num,len) \
- (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
+#define _IOC(inout,group,num,len) (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
+
#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
+
/* this should be _IORW, but stdio got there first */
#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
|