2 * This file has been modified for the cdrkit suite.
4 * The behaviour and appearence of the program code below can differ to a major
5 * extent from the version distributed by the original author(s).
7 * For details, see Changelog file distributed with the cdrkit package. If you
8 * received this file from another source then ask the distributing person for
9 * a log of modifications.
13 /* @(#)device.h 1.13 05/01/24 Copyright 1995 J. Schilling */
15 * Generic header for users of major(), minor() and makedev()
17 * Copyright (c) 1995 J. Schilling
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License version 2
22 * as published by the Free Software Foundation.
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License along with
30 * this program; see the file COPYING. If not, write to the Free Software
31 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
45 * On generic SVR4, major is a function (defined in sys/mkdev.h).
46 * On Solaris it is defined ...
47 * As we cannot just test if major is #define'd, we have to
48 * define _FOUND_MAJOR_ instead.
50 * WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains
51 * an old definition for major()/minor() defining 8 minorbits.
52 * Use <sys/mkdev.h> instead.
54 #ifndef _INCL_SYS_TYPES_H
55 #include <sys/types.h>
56 #define _INCL_SYS_TYPES_H
59 * Some systems define major in <sys/types.h>.
63 # define _FOUND_MAJOR_
67 # ifndef _INCL_SYS_MKDEV_H
68 # include <sys/mkdev.h>
69 # define _INCL_SYS_MKDEV_H
72 * Interix doesn't use makedev(); it uses mkdev()
74 # if !defined(makedev) && defined(mkdev)
75 # define makedev(a,b) mkdev((a),(b))
77 # define _FOUND_MAJOR_
81 # ifdef MAJOR_IN_SYSMACROS
82 # ifndef _INCL_SYS_SYSMACROS_H
83 # include <sys/sysmacros.h>
84 # define _INCL_SYS_SYSMACROS_H
86 # define _FOUND_MAJOR_
91 * If we are on HP/UX before HP/UX 8,
92 * major/minor are not in <sys/sysmacros.h>.
95 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
96 # ifndef _INCL_SYS_MKOD_H
97 # include <sys/mknod.h>
98 # define _INCL_SYS_MKOD_H
100 # define _FOUND_MAJOR_
109 * For all other systems define major()/minor() here.
110 * XXX Check if this definition will be usefull for ms dos too.
112 #ifndef _FOUND_MAJOR_
113 # define major(dev) (((dev) >> 8) & 0xFF)
114 # define minor(dev) ((dev) & 0xFF)
115 # define makedev(majo, mino) (((majo) << 8) | (mino))
119 * Don't pollute namespace...
125 * The following defines are currently only needed for 'star'.
126 * We make it conditional code to avoid to pollute the namespace.
128 #define XDEV_T unsigned long
130 extern int minorbits;
131 extern XDEV_T minormask;
132 extern XDEV_T _dev_mask[];
134 #define dev_major(dev) (((XDEV_T)(dev)) >> minorbits)
135 #define _dev_major(mbits, dev) (((XDEV_T)(dev)) >> (mbits))
137 #define dev_minor(dev) (((XDEV_T)(dev)) & minormask)
138 #define _dev_minor(mbits, dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)])
141 #define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \
143 #define _dev_make(mbits, majo, mino) ((((XDEV_T)(majo)) << (mbits) | \
146 extern void dev_init(BOOL debug);
148 extern XDEV_T dev_major(XDEV_T dev);
149 extern XDEV_T _dev_major(int mbits, XDEV_T dev);
150 extern XDEV_T dev_minor(XDEV_T dev);
151 extern XDEV_T _dev_minor(int mbits, XDEV_T dev);
152 extern XDEV_T dev_make(XDEV_T majo, XDEV_T mino);
153 extern XDEV_T _dev_make(int mbits, XDEV_T majo, XDEV_T mino);
156 #endif /* __XDEV__ */
162 #endif /* _DEVICE_H */