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154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/* @(#)device.h 1.19 09/11/16 Copyright 1995-2007 J. Schilling */
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/*
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* Generic header for users of major(), minor() and makedev()
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*
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* Copyright (c) 1995-2007 J. Schilling
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#ifndef _SCHILY_DEVICE_H
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#define _SCHILY_DEVICE_H
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#ifndef _SCHILY_MCONFIG_H
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#include <schily/mconfig.h>
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#endif
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/*
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* On generic SVR4, major is a function (defined in sys/mkdev.h).
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* On Solaris it is defined ...
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* As we cannot just test if major is #define'd, we have to
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* define _FOUND_MAJOR_ instead.
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*
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* WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains
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* an old definition for major()/minor() defining 8 minorbits.
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* Use <sys/mkdev.h> instead.
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*/
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#ifndef _SCHILY_TYPES_H
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#include <schily/types.h>
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#endif
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/*
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* Some systems define major in <sys/types.h>.
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* We are ready...
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*/
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#ifdef major
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# define _FOUND_MAJOR_
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#endif
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#ifdef MAJOR_IN_MKDEV
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# ifndef _INCL_SYS_MKDEV_H
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# include <sys/mkdev.h>
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# define _INCL_SYS_MKDEV_H
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# endif
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/*
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* Interix doesn't use makedev(); it uses mkdev()
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*/
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# if !defined(makedev) && defined(mkdev)
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# define makedev(a, b) mkdev((a), (b))
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# endif
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# define _FOUND_MAJOR_
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#endif
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#ifndef _FOUND_MAJOR_
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# ifdef MAJOR_IN_SYSMACROS
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# ifndef _INCL_SYS_SYSMACROS_H
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# include <sys/sysmacros.h>
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# define _INCL_SYS_SYSMACROS_H
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# endif
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# define _FOUND_MAJOR_
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# endif
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#endif
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/*
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* If we are on HP/UX before HP/UX 8,
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* major/minor are not in <sys/sysmacros.h>.
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*/
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#ifndef _FOUND_MAJOR_
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# if defined(hpux) || defined(__hpux__) || defined(__hpux)
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# ifndef _INCL_SYS_MKOD_H
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# include <sys/mknod.h>
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# define _INCL_SYS_MKOD_H
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# endif
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# define _FOUND_MAJOR_
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# endif
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#endif
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#ifndef _FOUND_MAJOR_
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# ifdef VMS
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# define major(dev) (((((long)dev) >> 8) & 0xFF))
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# define minor(dev) ((((long)dev) & 0xFF))
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# define makedev(majo, mino) (((majo) << 8) | (mino))
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# define _FOUND_MAJOR_
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# endif /* VMS */
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#endif /* _FOUND_MAJOR_ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* For all other systems define major()/minor() here.
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* XXX Check if this definition will be usefull for ms dos too.
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*/
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#ifndef _FOUND_MAJOR_
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# define major(dev) (((dev) >> 8) & 0xFF)
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# define minor(dev) ((dev) & 0xFF)
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# define makedev(majo, mino) (((majo) << 8) | (mino))
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#endif
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/*
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* Don't pollute namespace...
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*/
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#undef _FOUND_MAJOR_
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#ifdef __XDEV__
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/*
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* The following defines are currently only needed for 'star'.
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* We make it conditional code to avoid to pollute the namespace.
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*/
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#define XDEV_T unsigned long
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extern int minorbits;
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extern XDEV_T minormask;
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extern XDEV_T _dev_mask[];
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#define dev_major(dev) (((XDEV_T)(dev)) >> minorbits)
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#define _dev_major(mbits, dev) (((XDEV_T)(dev)) >> (mbits))
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#define dev_minor(dev) (((XDEV_T)(dev)) & minormask)
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#define _dev_minor(mbits, dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)])
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#define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \
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((XDEV_T)(mino)))
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#define _dev_make(mbits, majo, mino) ((((XDEV_T)(majo)) << (mbits) | \
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((XDEV_T)(mino)))
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extern void dev_init __PR((BOOL debug));
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#ifndef dev_major
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extern XDEV_T dev_major __PR((XDEV_T dev));
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extern XDEV_T _dev_major __PR((int mbits, XDEV_T dev));
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extern XDEV_T dev_minor __PR((XDEV_T dev));
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extern XDEV_T _dev_minor __PR((int mbits, XDEV_T dev));
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extern XDEV_T dev_make __PR((XDEV_T majo, XDEV_T mino));
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extern XDEV_T _dev_make __PR((int mbits, XDEV_T majo, XDEV_T mino));
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#endif
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#endif /* __XDEV__ */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SCHILY_DEVICE_H */
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