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 == NULL) 283 return (NULL); 284 return (format->pack); 285 } 286