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      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 }
    291