| [4] | 1 | /* minix/ioctl.h - Ioctl helper definitions. Author: Kees J. Bot
|
|---|
| 2 | * 23 Nov 2002
|
|---|
| 3 | *
|
|---|
| 4 | * This file is included by every header file that defines ioctl codes.
|
|---|
| 5 | */
|
|---|
| 6 |
|
|---|
| 7 | #ifndef _M_IOCTL_H
|
|---|
| 8 | #define _M_IOCTL_H
|
|---|
| 9 |
|
|---|
| 10 | #ifndef _TYPES_H
|
|---|
| 11 | #include <sys/types.h>
|
|---|
| 12 | #endif
|
|---|
| 13 |
|
|---|
| 14 | #if _EM_WSIZE >= 4
|
|---|
| 15 | /* Ioctls have the command encoded in the low-order word, and the size
|
|---|
| 16 | * of the parameter in the high-order word. The 3 high bits of the high-
|
|---|
| 17 | * order word are used to encode the in/out/void status of the parameter.
|
|---|
| 18 | */
|
|---|
| 19 | #define _IOCPARM_MASK 0x1FFF
|
|---|
| 20 | #define _IOC_VOID 0x20000000
|
|---|
| 21 | #define _IOCTYPE_MASK 0xFFFF
|
|---|
| 22 | #define _IOC_IN 0x40000000
|
|---|
| 23 | #define _IOC_OUT 0x80000000
|
|---|
| 24 | #define _IOC_INOUT (_IOC_IN | _IOC_OUT)
|
|---|
| 25 |
|
|---|
| 26 | #define _IO(x,y) ((x << 8) | y | _IOC_VOID)
|
|---|
| 27 | #define _IOR(x,y,t) ((x << 8) | y | ((sizeof(t) & _IOCPARM_MASK) << 16) |\
|
|---|
| 28 | _IOC_OUT)
|
|---|
| 29 | #define _IOW(x,y,t) ((x << 8) | y | ((sizeof(t) & _IOCPARM_MASK) << 16) |\
|
|---|
| 30 | _IOC_IN)
|
|---|
| 31 | #define _IORW(x,y,t) ((x << 8) | y | ((sizeof(t) & _IOCPARM_MASK) << 16) |\
|
|---|
| 32 | _IOC_INOUT)
|
|---|
| 33 | #else
|
|---|
| 34 | /* No fancy encoding on a 16-bit machine. */
|
|---|
| 35 |
|
|---|
| 36 | #define _IO(x,y) ((x << 8) | y)
|
|---|
| 37 | #define _IOR(x,y,t) _IO(x,y)
|
|---|
| 38 | #define _IOW(x,y,t) _IO(x,y)
|
|---|
| 39 | #define _IORW(x,y,t) _IO(x,y)
|
|---|
| 40 | #endif
|
|---|
| 41 |
|
|---|
| 42 | int ioctl(int _fd, int _request, void *_data);
|
|---|
| 43 |
|
|---|
| 44 | #endif /* _M_IOCTL_H */
|
|---|
