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ioctl.h
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /*
- * BK Id: SCCS/s.ioctl.h 1.5 05/17/01 18:14:24 cort
- */
- #ifndef _PPC_IOCTL_H
- #define _PPC_IOCTL_H
- /*
- * this was copied from the alpha as it's a bit cleaner there.
- * -- Cort
- */
- #define _IOC_NRBITS 8
- #define _IOC_TYPEBITS 8
- #define _IOC_SIZEBITS 13
- #define _IOC_DIRBITS 3
- #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
- #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
- #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
- #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
- #define _IOC_NRSHIFT 0
- #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
- #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
- #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
- /*
- * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
- * And this turns out useful to catch old ioctl numbers in header
- * files for us.
- */
- #define _IOC_NONE 1U
- #define _IOC_READ 2U
- #define _IOC_WRITE 4U
- #define _IOC(dir,type,nr,size)
- (((dir) << _IOC_DIRSHIFT) |
- ((type) << _IOC_TYPESHIFT) |
- ((nr) << _IOC_NRSHIFT) |
- ((size) << _IOC_SIZESHIFT))
- /* used to create numbers */
- #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
- #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
- #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
- #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
- /* used to decode them.. */
- #define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
- #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
- #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
- #define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
- /* various drivers, such as the pcmcia stuff, need these... */
- #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
- #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
- #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
- #define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
- #define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
- #endif