usr.sbin/mtree/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/types.h>
  37 #include <sys/stat.h>
  38
  39 #include <limits.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44
  45 #include "pack_dev.h"
  46
  47 static  pack_t  pack_netbsd;
  48 static  pack_t  pack_freebsd;
  49 static  pack_t  pack_8_8;
  50 static  pack_t  pack_12_20;
  51 static  pack_t  pack_14_18;
  52 static  pack_t  pack_8_24;
  53 static  pack_t  pack_bsdos;
  54 static  int     compare_format(const void *, const void *);
  55
  56 static const char iMajorError[] = "invalid major number";
  57 static const char iMinorError[] = "invalid minor number";
  58 static const char tooManyFields[] = "too many fields for format";
  59
  60         /* exported */
  61 dev_t
  62 pack_native(int n, u_long numbers[], const char **error)
  63 {
  64         dev_t dev = 0;
  65
  66         if (n == 2) {
  67                 dev = makedev(numbers[0], numbers[1]);
  68                 if ((u_long)major(dev) != numbers[0])
  69                         *error = iMajorError;
  70                 else if ((u_long)minor(dev) != numbers[1])
  71                         *error = iMinorError;
  72         } else
  73                 *error = tooManyFields;
  74         return (dev);
  75 }
  76
  77
  78 static dev_t
  79 pack_netbsd(int n, u_long numbers[], const char **error)
  80 {
  81         dev_t dev = 0;
  82
  83         if (n == 2) {
  84                 dev = makedev_netbsd(numbers[0], numbers[1]);
  85                 if ((u_long)major_netbsd(dev) != numbers[0])
  86                         *error = iMajorError;
  87                 else if ((u_long)minor_netbsd(dev) != numbers[1])
  88                         *error = iMinorError;
  89         } else
  90                 *error = tooManyFields;
  91         return (dev);
  92 }
  93
  94
  95 #define major_freebsd(x)        ((int32_t)(((x) & 0x0000ff00) >> 8))
  96 #define minor_freebsd(x)        ((int32_t)(((x) & 0xffff00ff) >> 0))
  97 #define makedev_freebsd(x,y)    ((dev_t)((((x) << 8) & 0x0000ff00) | \
  98                                          (((y) << 0) & 0xffff00ff)))
  99
 100 static dev_t
 101 pack_freebsd(int n, u_long numbers[], const char **error)
 102 {
 103         dev_t dev = 0;
 104
 105         if (n == 2) {
 106                 dev = makedev_freebsd(numbers[0], numbers[1]);
 107                 if ((u_long)major_freebsd(dev) != numbers[0])
 108                         *error = iMajorError;
 109                 if ((u_long)minor_freebsd(dev) != numbers[1])
 110                         *error = iMinorError;
 111         } else
 112                 *error = tooManyFields;
 113         return (dev);
 114 }
 115
 116
 117 #define major_8_8(x)            ((int32_t)(((x) & 0x0000ff00) >> 8))
 118 #define minor_8_8(x)            ((int32_t)(((x) & 0x000000ff) >> 0))
 119 #define makedev_8_8(x,y)        ((dev_t)((((x) << 8) & 0x0000ff00) | \
 120                                          (((y) << 0) & 0x000000ff)))
 121
 122 static dev_t
 123 pack_8_8(int n, u_long numbers[], const char **error)
 124 {
 125         dev_t dev = 0;
 126
 127         if (n == 2) {
 128                 dev = makedev_8_8(numbers[0], numbers[1]);
 129                 if ((u_long)major_8_8(dev) != numbers[0])
 130                         *error = iMajorError;
 131                 if ((u_long)minor_8_8(dev) != numbers[1])
 132                         *error = iMinorError;
 133         } else
 134                 *error = tooManyFields;
 135         return (dev);
 136 }
 137
 138
 139 #define major_12_20(x)          ((int32_t)(((x) & 0xfff00000) >> 20))
 140 #define minor_12_20(x)          ((int32_t)(((x) & 0x000fffff) >>  0))
 141 #define makedev_12_20(x,y)      ((dev_t)((((x) << 20) & 0xfff00000) | \
 142                                          (((y) <<  0) & 0x000fffff)))
 143
 144 static dev_t
 145 pack_12_20(int n, u_long numbers[], const char **error)
 146 {
 147         dev_t dev = 0;
 148
 149         if (n == 2) {
 150                 dev = makedev_12_20(numbers[0], numbers[1]);
 151                 if ((u_long)major_12_20(dev) != numbers[0])
 152                         *error = iMajorError;
 153                 if ((u_long)minor_12_20(dev) != numbers[1])
 154                         *error = iMinorError;
 155         } else
 156                 *error = tooManyFields;
 157         return (dev);
 158 }
 159
 160
 161 #define major_14_18(x)          ((int32_t)(((x) & 0xfffc0000) >> 18))
 162 #define minor_14_18(x)          ((int32_t)(((x) & 0x0003ffff) >>  0))
 163 #define makedev_14_18(x,y)      ((dev_t)((((x) << 18) & 0xfffc0000) | \
 164                                          (((y) <<  0) & 0x0003ffff)))
 165
 166 static dev_t
 167 pack_14_18(int n, u_long numbers[], const char **error)
 168 {
 169         dev_t dev = 0;
 170
 171         if (n == 2) {
 172                 dev = makedev_14_18(numbers[0], numbers[1]);
 173                 if ((u_long)major_14_18(dev) != numbers[0])
 174                         *error = iMajorError;
 175                 if ((u_long)minor_14_18(dev) != numbers[1])
 176                         *error = iMinorError;
 177         } else
 178                 *error = tooManyFields;
 179         return (dev);
 180 }
 181
 182
 183 #define major_8_24(x)           ((int32_t)(((x) & 0xff000000) >> 24))
 184 #define minor_8_24(x)           ((int32_t)(((x) & 0x00ffffff) >>  0))
 185 #define makedev_8_24(x,y)       ((dev_t)((((x) << 24) & 0xff000000) | \
 186                                          (((y) <<  0) & 0x00ffffff)))
 187
 188 static dev_t
 189 pack_8_24(int n, u_long numbers[], const char **error)
 190 {
 191         dev_t dev = 0;
 192
 193         if (n == 2) {
 194                 dev = makedev_8_24(numbers[0], numbers[1]);
 195                 if ((u_long)major_8_24(dev) != numbers[0])
 196                         *error = iMajorError;
 197                 if ((u_long)minor_8_24(dev) != numbers[1])
 198                         *error = iMinorError;
 199         } else
 200                 *error = tooManyFields;
 201         return (dev);
 202 }
 203
 204
 205 #define major_12_12_8(x)        ((int32_t)(((x) & 0xfff00000) >> 20))
 206 #define unit_12_12_8(x)         ((int32_t)(((x) & 0x000fff00) >>  8))
 207 #define subunit_12_12_8(x)      ((int32_t)(((x) & 0x000000ff) >>  0))
 208 #define makedev_12_12_8(x,y,z)  ((dev_t)((((x) << 20) & 0xfff00000) | \
 209                                          (((y) <<  8) & 0x000fff00) | \
 210                                          (((z) <<  0) & 0x000000ff)))
 211
 212 static dev_t
 213 pack_bsdos(int n, u_long numbers[], const char **error)
 214 {
 215         dev_t dev = 0;
 216
 217         if (n == 2) {
 218                 dev = makedev_12_20(numbers[0], numbers[1]);
 219                 if ((u_long)major_12_20(dev) != numbers[0])
 220                         *error = iMajorError;
 221                 if ((u_long)minor_12_20(dev) != numbers[1])
 222                         *error = iMinorError;
 223         } else if (n == 3) {
 224                 dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
 225                 if ((u_long)major_12_12_8(dev) != numbers[0])
 226                         *error = iMajorError;
 227                 if ((u_long)unit_12_12_8(dev) != numbers[1])
 228                         *error = "invalid unit number";
 229                 if ((u_long)subunit_12_12_8(dev) != numbers[2])
 230                         *error = "invalid subunit number";
 231         } else
 232                 *error = tooManyFields;
 233         return (dev);
 234 }
 235
 236
 237                 /* list of formats and pack functions */
 238                 /* this list must be sorted lexically */
 239 static struct format {
 240         const char      *name;
 241         pack_t          *pack;
 242 } formats[] = {
 243         {"386bsd",  pack_8_8},
 244         {"4bsd",    pack_8_8},
 245         {"bsdos",   pack_bsdos},
 246         {"freebsd", pack_freebsd},
 247         {"hpux",    pack_8_24},
 248         {"isc",     pack_8_8},
 249         {"linux",   pack_8_8},
 250         {"native",  pack_native},
 251         {"netbsd",  pack_netbsd},
 252         {"osf1",    pack_12_20},
 253         {"sco",     pack_8_8},
 254         {"solaris", pack_14_18},
 255         {"sunos",   pack_8_8},
 256         {"svr3",    pack_8_8},
 257         {"svr4",    pack_14_18},
 258         {"ultrix",  pack_8_8},
 259 };
 260
 261 static int
 262 compare_format(const void *key, const void *element)
 263 {
 264         const char              *name;
 265         const struct format     *format;
 266
 267         name = key;
 268         format = element;
 269
 270         return (strcmp(name, format->name));
 271 }
 272
 273
 274 pack_t *
 275 pack_find(const char *name)
 276 {
 277         struct format   *format;
 278
 279         format = bsearch(name, formats,
 280             sizeof(formats)/sizeof(formats[0]),
 281             sizeof(formats[0]), compare_format);
 282         if (format == 0)
 283                 return (NULL);
 284         return (format->pack);
 285 }