sbin/mknod/pack_dev.c

   1 /*      $NetBSD: pack_dev.c,v 1.12 2013/06/14 16:28:20 tsutsui Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if !defined(lint)
  38 __RCSID("$NetBSD: pack_dev.c,v 1.12 2013/06/14 16:28:20 tsutsui Exp $");
  39 #endif /* not lint */
  40
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43
  44 #include <limits.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <unistd.h>
  49
  50 #include "pack_dev.h"
  51
  52 static  pack_t  pack_netbsd;
  53 static  pack_t  pack_freebsd;
  54 static  pack_t  pack_8_8;
  55 static  pack_t  pack_12_20;
  56 static  pack_t  pack_14_18;
  57 static  pack_t  pack_8_24;
  58 static  pack_t  pack_bsdos;
  59 static  int     compare_format(const void *, const void *);
  60
  61 static const char iMajorError[] = "invalid major number";
  62 static const char iMinorError[] = "invalid minor number";
  63 static const char tooManyFields[] = "too many fields for format";
  64
  65         /* exported */
  66 dev_t
  67 pack_native(int n, u_long numbers[], const char **error)
  68 {
  69         dev_t dev = 0;
  70
  71         if (n == 2) {
  72                 dev = makedev(numbers[0], numbers[1]);
  73                 if ((u_long)major(dev) != numbers[0])
  74                         *error = iMajorError;
  75                 else if ((u_long)minor(dev) != numbers[1])
  76                         *error = iMinorError;
  77         } else
  78                 *error = tooManyFields;
  79         return (dev);
  80 }
  81
  82
  83 static dev_t
  84 pack_netbsd(int n, u_long numbers[], const char **error)
  85 {
  86         dev_t dev = 0;
  87
  88         if (n == 2) {
  89                 dev = makedev_netbsd(numbers[0], numbers[1]);
  90                 if ((u_long)major_netbsd(dev) != numbers[0])
  91                         *error = iMajorError;
  92                 else if ((u_long)minor_netbsd(dev) != numbers[1])
  93                         *error = iMinorError;
  94         } else
  95                 *error = tooManyFields;
  96         return (dev);
  97 }
  98
  99
 100 #define major_freebsd(x)        ((int32_t)(((x) & 0x0000ff00) >> 8))
 101 #define minor_freebsd(x)        ((int32_t)(((x) & 0xffff00ff) >> 0))
 102 #define makedev_freebsd(x,y)    ((dev_t)((((x) << 8) & 0x0000ff00) | \
 103                                          (((y) << 0) & 0xffff00ff)))
 104
 105 static dev_t
 106 pack_freebsd(int n, u_long numbers[], const char **error)
 107 {
 108         dev_t dev = 0;
 109
 110         if (n == 2) {
 111                 dev = makedev_freebsd(numbers[0], numbers[1]);
 112                 if ((u_long)major_freebsd(dev) != numbers[0])
 113                         *error = iMajorError;
 114                 if ((u_long)minor_freebsd(dev) != numbers[1])
 115                         *error = iMinorError;
 116         } else
 117                 *error = tooManyFields;
 118         return (dev);
 119 }
 120
 121
 122 #define major_8_8(x)            ((int32_t)(((x) & 0x0000ff00) >> 8))
 123 #define minor_8_8(x)            ((int32_t)(((x) & 0x000000ff) >> 0))
 124 #define makedev_8_8(x,y)        ((dev_t)((((x) << 8) & 0x0000ff00) | \
 125                                          (((y) << 0) & 0x000000ff)))
 126
 127 static dev_t
 128 pack_8_8(int n, u_long numbers[], const char **error)
 129 {
 130         dev_t dev = 0;
 131
 132         if (n == 2) {
 133                 dev = makedev_8_8(numbers[0], numbers[1]);
 134                 if ((u_long)major_8_8(dev) != numbers[0])
 135                         *error = iMajorError;
 136                 if ((u_long)minor_8_8(dev) != numbers[1])
 137                         *error = iMinorError;
 138         } else
 139                 *error = tooManyFields;
 140         return (dev);
 141 }
 142
 143
 144 #define major_12_20(x)          ((int32_t)(((x) & 0xfff00000) >> 20))
 145 #define minor_12_20(x)          ((int32_t)(((x) & 0x000fffff) >>  0))
 146 #define makedev_12_20(x,y)      ((dev_t)((((x) << 20) & 0xfff00000) | \
 147                                          (((y) <<  0) & 0x000fffff)))
 148
 149 static dev_t
 150 pack_12_20(int n, u_long numbers[], const char **error)
 151 {
 152         dev_t dev = 0;
 153
 154         if (n == 2) {
 155                 dev = makedev_12_20(numbers[0], numbers[1]);
 156                 if ((u_long)major_12_20(dev) != numbers[0])
 157                         *error = iMajorError;
 158                 if ((u_long)minor_12_20(dev) != numbers[1])
 159                         *error = iMinorError;
 160         } else
 161                 *error = tooManyFields;
 162         return (dev);
 163 }
 164
 165
 166 #define major_14_18(x)          ((int32_t)(((x) & 0xfffc0000) >> 18))
 167 #define minor_14_18(x)          ((int32_t)(((x) & 0x0003ffff) >>  0))
 168 #define makedev_14_18(x,y)      ((dev_t)((((x) << 18) & 0xfffc0000) | \
 169                                          (((y) <<  0) & 0x0003ffff)))
 170
 171 static dev_t
 172 pack_14_18(int n, u_long numbers[], const char **error)
 173 {
 174         dev_t dev = 0;
 175
 176         if (n == 2) {
 177                 dev = makedev_14_18(numbers[0], numbers[1]);
 178                 if ((u_long)major_14_18(dev) != numbers[0])
 179                         *error = iMajorError;
 180                 if ((u_long)minor_14_18(dev) != numbers[1])
 181                         *error = iMinorError;
 182         } else
 183                 *error = tooManyFields;
 184         return (dev);
 185 }
 186
 187
 188 #define major_8_24(x)           ((int32_t)(((x) & 0xff000000) >> 24))
 189 #define minor_8_24(x)           ((int32_t)(((x) & 0x00ffffff) >>  0))
 190 #define makedev_8_24(x,y)       ((dev_t)((((x) << 24) & 0xff000000) | \
 191                                          (((y) <<  0) & 0x00ffffff)))
 192
 193 static dev_t
 194 pack_8_24(int n, u_long numbers[], const char **error)
 195 {
 196         dev_t dev = 0;
 197
 198         if (n == 2) {
 199                 dev = makedev_8_24(numbers[0], numbers[1]);
 200                 if ((u_long)major_8_24(dev) != numbers[0])
 201                         *error = iMajorError;
 202                 if ((u_long)minor_8_24(dev) != numbers[1])
 203                         *error = iMinorError;
 204         } else
 205                 *error = tooManyFields;
 206         return (dev);
 207 }
 208
 209
 210 #define major_12_12_8(x)        ((int32_t)(((x) & 0xfff00000) >> 20))
 211 #define unit_12_12_8(x)         ((int32_t)(((x) & 0x000fff00) >>  8))
 212 #define subunit_12_12_8(x)      ((int32_t)(((x) & 0x000000ff) >>  0))
 213 #define makedev_12_12_8(x,y,z)  ((dev_t)((((x) << 20) & 0xfff00000) | \
 214                                          (((y) <<  8) & 0x000fff00) | \
 215                                          (((z) <<  0) & 0x000000ff)))
 216
 217 static dev_t
 218 pack_bsdos(int n, u_long numbers[], const char **error)
 219 {
 220         dev_t dev = 0;
 221
 222         if (n == 2) {
 223                 dev = makedev_12_20(numbers[0], numbers[1]);
 224                 if ((u_long)major_12_20(dev) != numbers[0])
 225                         *error = iMajorError;
 226                 if ((u_long)minor_12_20(dev) != numbers[1])
 227                         *error = iMinorError;
 228         } else if (n == 3) {
 229                 dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
 230                 if ((u_long)major_12_12_8(dev) != numbers[0])
 231                         *error = iMajorError;
 232                 if ((u_long)unit_12_12_8(dev) != numbers[1])
 233                         *error = "invalid unit number";
 234                 if ((u_long)subunit_12_12_8(dev) != numbers[2])
 235                         *error = "invalid subunit number";
 236         } else
 237                 *error = tooManyFields;
 238         return (dev);
 239 }
 240
 241
 242                 /* list of formats and pack functions */
 243                 /* this list must be sorted lexically */
 244 static struct format {
 245         const char      *name;
 246         pack_t          *pack;
 247 } formats[] = {
 248         {"386bsd",  pack_8_8},
 249         {"4bsd",    pack_8_8},
 250         {"bsdos",   pack_bsdos},
 251         {"freebsd", pack_freebsd},
 252         {"hpux",    pack_8_24},
 253         {"isc",     pack_8_8},
 254         {"linux",   pack_8_8},
 255         {"native",  pack_native},
 256         {"netbsd",  pack_netbsd},
 257         {"osf1",    pack_12_20},
 258         {"sco",     pack_8_8},
 259         {"solaris", pack_14_18},
 260         {"sunos",   pack_8_8},
 261         {"svr3",    pack_8_8},
 262         {"svr4",    pack_14_18},
 263         {"ultrix",  pack_8_8},
 264 };
 265
 266 static int
 267 compare_format(const void *key, const void *element)
 268 {
 269         const char              *name;
 270         const struct format     *format;
 271
 272         name = key;
 273         format = element;
 274
 275         return (strcmp(name, format->name));
 276 }
 277
 278
 279 pack_t *
 280 pack_find(const char *name)
 281 {
 282         struct format   *format;
 283
 284         format = bsearch(name, formats,
 285             sizeof(formats)/sizeof(formats[0]),
 286             sizeof(formats[0]), compare_format);
 287         if (format == 0)
 288                 return (NULL);
 289         return (format->pack);
 290 }