1 /* @(#)device.h 1.19 09/11/16 Copyright 1995-2007 J. Schilling */ 2 /* 3 * Generic header for users of major(), minor() and makedev() 4 * 5 * Copyright (c) 1995-2007 J. Schilling 6 */ 7 /* 8 * The contents of this file are subject to the terms of the 9 * Common Development and Distribution License, Version 1.0 only 10 * (the "License"). You may not use this file except in compliance 11 * with the License. 12 * 13 * See the file CDDL.Schily.txt in this distribution for details. 14 * 15 * When distributing Covered Code, include this CDDL HEADER in each 16 * file and include the License file CDDL.Schily.txt from this distribution. 17 */ 18 19 #ifndef _SCHILY_DEVICE_H 20 #define _SCHILY_DEVICE_H 21 22 #ifndef _SCHILY_MCONFIG_H 23 #include <schily/mconfig.h> 24 #endif 25 26 /* 27 * On generic SVR4, major is a function (defined in sys/mkdev.h). 28 * On Solaris it is defined ... 29 * As we cannot just test if major is #define'd, we have to 30 * define _FOUND_MAJOR_ instead. 31 * 32 * WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains 33 * an old definition for major()/minor() defining 8 minorbits. 34 * Use <sys/mkdev.h> instead. 35 */ 36 #ifndef _SCHILY_TYPES_H 37 #include <schily/types.h> 38 #endif 39 40 /* 41 * Some systems define major in <sys/types.h>. 42 * We are ready... 43 */ 44 #ifdef major 45 # define _FOUND_MAJOR_ 46 #endif 47 48 #ifdef MAJOR_IN_MKDEV 49 # ifndef _INCL_SYS_MKDEV_H 50 # include <sys/mkdev.h> 51 # define _INCL_SYS_MKDEV_H 52 # endif 53 /* 54 * Interix doesn't use makedev(); it uses mkdev() 55 */ 56 # if !defined(makedev) && defined(mkdev) 57 # define makedev(a, b) mkdev((a), (b)) 58 # endif 59 # define _FOUND_MAJOR_ 60 #endif 61 62 #ifndef _FOUND_MAJOR_ 63 # ifdef MAJOR_IN_SYSMACROS 64 # ifndef _INCL_SYS_SYSMACROS_H 65 # include <sys/sysmacros.h> 66 # define _INCL_SYS_SYSMACROS_H 67 # endif 68 # define _FOUND_MAJOR_ 69 # endif 70 #endif 71 72 /* 73 * If we are on HP/UX before HP/UX 8, 74 * major/minor are not in <sys/sysmacros.h>. 75 */ 76 #ifndef _FOUND_MAJOR_ 77 # if defined(hpux) || defined(__hpux__) || defined(__hpux) 78 # ifndef _INCL_SYS_MKOD_H 79 # include <sys/mknod.h> 80 # define _INCL_SYS_MKOD_H 81 # endif 82 # define _FOUND_MAJOR_ 83 # endif 84 #endif 85 86 #ifndef _FOUND_MAJOR_ 87 # ifdef VMS 88 # define major(dev) (((((long)dev) >> 8) & 0xFF)) 89 # define minor(dev) ((((long)dev) & 0xFF)) 90 # define makedev(majo, mino) (((majo) << 8) | (mino)) 91 # define _FOUND_MAJOR_ 92 # endif /* VMS */ 93 #endif /* _FOUND_MAJOR_ */ 94 95 #ifdef __cplusplus 96 extern "C" { 97 #endif 98 99 /* 100 * For all other systems define major()/minor() here. 101 * XXX Check if this definition will be usefull for ms dos too. 102 */ 103 #ifndef _FOUND_MAJOR_ 104 # define major(dev) (((dev) >> 8) & 0xFF) 105 # define minor(dev) ((dev) & 0xFF) 106 # define makedev(majo, mino) (((majo) << 8) | (mino)) 107 #endif 108 109 /* 110 * Don't pollute namespace... 111 */ 112 #undef _FOUND_MAJOR_ 113 114 #ifdef __XDEV__ 115 /* 116 * The following defines are currently only needed for 'star'. 117 * We make it conditional code to avoid to pollute the namespace. 118 */ 119 #define XDEV_T unsigned long 120 121 extern int minorbits; 122 extern XDEV_T minormask; 123 extern XDEV_T _dev_mask[]; 124 125 #define dev_major(dev) (((XDEV_T)(dev)) >> minorbits) 126 #define _dev_major(mbits, dev) (((XDEV_T)(dev)) >> (mbits)) 127 128 #define dev_minor(dev) (((XDEV_T)(dev)) & minormask) 129 #define _dev_minor(mbits, dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)]) 130 131 132 #define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \ 133 ((XDEV_T)(mino))) 134 #define _dev_make(mbits, majo, mino) ((((XDEV_T)(majo)) << (mbits) | \ 135 ((XDEV_T)(mino))) 136 137 extern void dev_init __PR((BOOL debug)); 138 #ifndef dev_major 139 extern XDEV_T dev_major __PR((XDEV_T dev)); 140 extern XDEV_T _dev_major __PR((int mbits, XDEV_T dev)); 141 extern XDEV_T dev_minor __PR((XDEV_T dev)); 142 extern XDEV_T _dev_minor __PR((int mbits, XDEV_T dev)); 143 extern XDEV_T dev_make __PR((XDEV_T majo, XDEV_T mino)); 144 extern XDEV_T _dev_make __PR((int mbits, XDEV_T majo, XDEV_T mino)); 145 #endif 146 147 #endif /* __XDEV__ */ 148 149 #ifdef __cplusplus 150 } 151 #endif 152 153 #endif /* _SCHILY_DEVICE_H */ 154