1 /* @(#)device.h 1.21 21/07/19 Copyright 1995-2021 J. Schilling */ 2 /* 3 * Generic header for users of major(), minor() and makedev() 4 * 5 * Copyright (c) 1995-2021 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 * A copy of the CDDL is also available via the Internet at 15 * http://www.opensource.org/licenses/cddl1.txt 16 * 17 * When distributing Covered Code, include this CDDL HEADER in each 18 * file and include the License file CDDL.Schily.txt from this distribution. 19 */ 20 21 #ifndef _SCHILY_DEVICE_H 22 #define _SCHILY_DEVICE_H 23 24 #ifndef _SCHILY_MCONFIG_H 25 #include <schily/mconfig.h> 26 #endif 27 28 /* 29 * On generic SVR4, major is a function (defined in sys/mkdev.h). 30 * On Solaris it is defined ... 31 * As we cannot just test if major is #define'd, we have to 32 * define _FOUND_MAJOR_ instead. 33 * 34 * WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains 35 * an old definition for major()/minor() defining 8 minorbits. 36 * Use <sys/mkdev.h> instead. 37 */ 38 #ifndef _SCHILY_TYPES_H 39 #include <schily/types.h> 40 #endif 41 #ifndef _SCHILY_STDINT_H 42 #include <schily/stdint.h> 43 #endif 44 45 /* 46 * Some systems define major in <sys/types.h>. 47 * We are ready... 48 */ 49 #ifdef major 50 # define _FOUND_MAJOR_ 51 #endif 52 53 #ifdef MAJOR_IN_MKDEV 54 # ifndef _INCL_SYS_MKDEV_H 55 # include <sys/mkdev.h> 56 # define _INCL_SYS_MKDEV_H 57 # endif 58 /* 59 * Interix doesn't use makedev(); it uses mkdev() 60 */ 61 # if !defined(makedev) && defined(mkdev) 62 # define makedev(a, b) mkdev((a), (b)) 63 # endif 64 # define _FOUND_MAJOR_ 65 #endif 66 67 #ifndef _FOUND_MAJOR_ 68 # ifdef MAJOR_IN_SYSMACROS 69 # ifndef _INCL_SYS_SYSMACROS_H 70 # include <sys/sysmacros.h> 71 # define _INCL_SYS_SYSMACROS_H 72 # endif 73 # define _FOUND_MAJOR_ 74 # endif 75 #endif 76 77 /* 78 * If we are on HP/UX before HP/UX 8, 79 * major/minor are not in <sys/sysmacros.h>. 80 */ 81 #ifndef _FOUND_MAJOR_ 82 # if defined(hpux) || defined(__hpux__) || defined(__hpux) 83 # ifndef _INCL_SYS_MKOD_H 84 # include <sys/mknod.h> 85 # define _INCL_SYS_MKOD_H 86 # endif 87 # define _FOUND_MAJOR_ 88 # endif 89 #endif 90 91 #ifndef _FOUND_MAJOR_ 92 # if defined(OS390) || defined(__MVS__) 93 # include <sys/stat.h> 94 # define major(dev) S_MAJOR(dev) 95 # define minor(dev) S_MINOR(dev) 96 # define makedev(majo, mino) (((majo) << 16) | (mino)) 97 # define _FOUND_MAJOR_ 98 # endif /* z/OS */ 99 #endif /* _FOUND_MAJOR_ */ 100 101 #ifndef _FOUND_MAJOR_ 102 # ifdef VMS 103 # define major(dev) (((((long)dev) >> 8) & 0xFF)) 104 # define minor(dev) ((((long)dev) & 0xFF)) 105 # define makedev(majo, mino) (((majo) << 8) | (mino)) 106 # define _FOUND_MAJOR_ 107 # endif /* VMS */ 108 #endif /* _FOUND_MAJOR_ */ 109 110 #ifdef __cplusplus 111 extern "C" { 112 #endif 113 114 /* 115 * For all other systems define major()/minor() here. 116 * XXX Check if this definition will be usefull for ms dos too. 117 */ 118 #ifndef _FOUND_MAJOR_ 119 # define major(dev) (((dev) >> 8) & 0xFF) 120 # define minor(dev) ((dev) & 0xFF) 121 # define makedev(majo, mino) (((majo) << 8) | (mino)) 122 #endif 123 124 /* 125 * Don't pollute namespace... 126 */ 127 #undef _FOUND_MAJOR_ 128 129 #ifdef __XDEV__ 130 /* 131 * The following defines are currently only needed for 'star'. 132 * We make it conditional code to avoid to pollute the namespace. 133 */ 134 #define XDEV_T Ullong 135 136 extern int minorbits; 137 extern XDEV_T minormask; 138 extern XDEV_T _dev_mask[]; 139 140 #define dev_major(dev) (((XDEV_T)(dev)) >> minorbits) 141 #define _dev_major(mbits, dev) (((XDEV_T)(dev)) >> (mbits)) 142 143 #define dev_minor(dev) (((XDEV_T)(dev)) & minormask) 144 #define _dev_minor(mbits, dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)]) 145 146 147 #define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \ 148 ((XDEV_T)(mino))) 149 #define _dev_make(mbits, majo, mino) ((((XDEV_T)(majo)) << (mbits)) | \ 150 ((XDEV_T)(mino))) 151 152 extern void dev_init __PR((BOOL debug)); 153 #ifndef dev_major 154 extern XDEV_T dev_major __PR((XDEV_T dev)); 155 extern XDEV_T _dev_major __PR((int mbits, XDEV_T dev)); 156 extern XDEV_T dev_minor __PR((XDEV_T dev)); 157 extern XDEV_T _dev_minor __PR((int mbits, XDEV_T dev)); 158 extern XDEV_T dev_make __PR((XDEV_T majo, XDEV_T mino)); 159 extern XDEV_T _dev_make __PR((int mbits, XDEV_T majo, XDEV_T mino)); 160 #endif 161 162 #endif /* __XDEV__ */ 163 164 #ifdef __cplusplus 165 } 166 #endif 167 168 #endif /* _SCHILY_DEVICE_H */ 169