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pack_dev.c revision 1.6 
      1 /*	$NetBSD: pack_dev.c,v 1.6 2003/10/27 00:12:42 lukem 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #if HAVE_NBTOOL_CONFIG_H
     40 #include "nbtool_config.h"
     41 #endif
     42 
     43 #include <sys/cdefs.h>
     44 #if !defined(lint)
     45 __RCSID("$NetBSD: pack_dev.c,v 1.6 2003/10/27 00:12:42 lukem Exp $");
     46 #endif /* not lint */
     47 
     48 #include <sys/types.h>
     49 #include <sys/stat.h>
     50 
     51 #include <err.h>
     52 #include <limits.h>
     53 #include <stdio.h>
     54 #include <stdlib.h>
     55 #include <string.h>
     56 #include <unistd.h>
     57 
     58 #include "pack_dev.h"
     59 
     60 static	pack_t	pack_netbsd;
     61 static	pack_t	pack_freebsd;
     62 static	pack_t	pack_8_8;
     63 static	pack_t	pack_12_20;
     64 static	pack_t	pack_14_18;
     65 static	pack_t	pack_8_24;
     66 static	pack_t	pack_bsdos;
     67 static	int	compare_format(const void *, const void *);
     68 
     69 
     70 	/* exported */
     71 portdev_t
     72 pack_native(int n, u_long numbers[])
     73 {
     74 	portdev_t dev;
     75 
     76 	if (n == 2) {
     77 		dev = makedev(numbers[0], numbers[1]);
     78 		if (major(dev) != numbers[0])
     79 			errx(1, "invalid major number");
     80 		if (minor(dev) != numbers[1])
     81 			errx(1, "invalid minor number");
     82 	} else
     83 		errx(1, "too many fields for format");
     84 	return (dev);
     85 }
     86 
     87 
     88 static portdev_t
     89 pack_netbsd(int n, u_long numbers[])
     90 {
     91 	portdev_t dev;
     92 
     93 	if (n == 2) {
     94 		dev = makedev_netbsd(numbers[0], numbers[1]);
     95 		if (major_netbsd(dev) != numbers[0])
     96 			errx(1, "invalid major number");
     97 		if (minor_netbsd(dev) != numbers[1])
     98 			errx(1, "invalid minor number");
     99 	} else
    100 		errx(1, "too many fields for format");
    101 	return (dev);
    102 }
    103 
    104 
    105 #define	major_freebsd(x)	((int32_t)(((x) & 0x0000ff00) >> 8))
    106 #define	minor_freebsd(x)	((int32_t)(((x) & 0xffff00ff) >> 0))
    107 #define	makedev_freebsd(x,y)	((portdev_t)((((x) << 8) & 0x0000ff00) | \
    108 					 (((y) << 0) & 0xffff00ff)))
    109 
    110 static portdev_t
    111 pack_freebsd(int n, u_long numbers[])
    112 {
    113 	portdev_t dev;
    114 
    115 	if (n == 2) {
    116 		dev = makedev_freebsd(numbers[0], numbers[1]);
    117 		if (major_freebsd(dev) != numbers[0])
    118 			errx(1, "invalid major number");
    119 		if (minor_freebsd(dev) != numbers[1])
    120 			errx(1, "invalid minor number");
    121 	} else
    122 		errx(1, "too many fields for format");
    123 	return (dev);
    124 }
    125 
    126 
    127 #define	major_8_8(x)		((int32_t)(((x) & 0x0000ff00) >> 8))
    128 #define	minor_8_8(x)		((int32_t)(((x) & 0x000000ff) >> 0))
    129 #define	makedev_8_8(x,y)	((portdev_t)((((x) << 8) & 0x0000ff00) | \
    130 					 (((y) << 0) & 0x000000ff)))
    131 
    132 static portdev_t
    133 pack_8_8(int n, u_long numbers[])
    134 {
    135 	portdev_t dev;
    136 
    137 	if (n == 2) {
    138 		dev = makedev_8_8(numbers[0], numbers[1]);
    139 		if (major_8_8(dev) != numbers[0])
    140 			errx(1, "invalid major number");
    141 		if (minor_8_8(dev) != numbers[1])
    142 			errx(1, "invalid minor number");
    143 	} else
    144 		errx(1, "too many fields for format");
    145 	return (dev);
    146 }
    147 
    148 
    149 #define	major_12_20(x)		((int32_t)(((x) & 0xfff00000) >> 20))
    150 #define	minor_12_20(x)		((int32_t)(((x) & 0x000fffff) >>  0))
    151 #define	makedev_12_20(x,y)	((portdev_t)((((x) << 20) & 0xfff00000) | \
    152 					 (((y) <<  0) & 0x000fffff)))
    153 
    154 static portdev_t
    155 pack_12_20(int n, u_long numbers[])
    156 {
    157 	portdev_t dev;
    158 
    159 	if (n == 2) {
    160 		dev = makedev_12_20(numbers[0], numbers[1]);
    161 		if (major_12_20(dev) != numbers[0])
    162 			errx(1, "invalid major number");
    163 		if (minor_12_20(dev) != numbers[1])
    164 			errx(1, "invalid minor number");
    165 	} else
    166 		errx(1, "too many fields for format");
    167 	return (dev);
    168 }
    169 
    170 
    171 #define	major_14_18(x)		((int32_t)(((x) & 0xfffc0000) >> 18))
    172 #define	minor_14_18(x)		((int32_t)(((x) & 0x0003ffff) >>  0))
    173 #define	makedev_14_18(x,y)	((portdev_t)((((x) << 18) & 0xfffc0000) | \
    174 					 (((y) <<  0) & 0x0003ffff)))
    175 
    176 static portdev_t
    177 pack_14_18(int n, u_long numbers[])
    178 {
    179 	portdev_t dev;
    180 
    181 	if (n == 2) {
    182 		dev = makedev_14_18(numbers[0], numbers[1]);
    183 		if (major_14_18(dev) != numbers[0])
    184 			errx(1, "invalid major number");
    185 		if (minor_14_18(dev) != numbers[1])
    186 			errx(1, "invalid minor number");
    187 	} else
    188 		errx(1, "too many fields for format");
    189 	return (dev);
    190 }
    191 
    192 
    193 #define	major_8_24(x)		((int32_t)(((x) & 0xff000000) >> 24))
    194 #define	minor_8_24(x)		((int32_t)(((x) & 0x00ffffff) >>  0))
    195 #define	makedev_8_24(x,y)	((portdev_t)((((x) << 24) & 0xff000000) | \
    196 					 (((y) <<  0) & 0x00ffffff)))
    197 
    198 static portdev_t
    199 pack_8_24(int n, u_long numbers[])
    200 {
    201 	portdev_t dev;
    202 
    203 	if (n == 2) {
    204 		dev = makedev_8_24(numbers[0], numbers[1]);
    205 		if (major_8_24(dev) != numbers[0])
    206 			errx(1, "invalid major number");
    207 		if (minor_8_24(dev) != numbers[1])
    208 			errx(1, "invalid minor number");
    209 	} else
    210 		errx(1, "too many fields for format");
    211 	return (dev);
    212 }
    213 
    214 
    215 #define	major_12_12_8(x)	((int32_t)(((x) & 0xfff00000) >> 20))
    216 #define	unit_12_12_8(x)		((int32_t)(((x) & 0x000fff00) >>  8))
    217 #define	subunit_12_12_8(x)	((int32_t)(((x) & 0x000000ff) >>  0))
    218 #define	makedev_12_12_8(x,y,z)	((portdev_t)((((x) << 20) & 0xfff00000) | \
    219 					 (((y) <<  8) & 0x000fff00) | \
    220 					 (((z) <<  0) & 0x000000ff)))
    221 
    222 static portdev_t
    223 pack_bsdos(int n, u_long numbers[])
    224 {
    225 	portdev_t dev;
    226 
    227 	if (n == 2) {
    228 		dev = makedev_12_20(numbers[0], numbers[1]);
    229 		if (major_12_20(dev) != numbers[0])
    230 			errx(1, "invalid major number");
    231 		if (minor_12_20(dev) != numbers[1])
    232 			errx(1, "invalid minor number");
    233 	} else if (n == 3) {
    234 		dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
    235 		if (major_12_12_8(dev) != numbers[0])
    236 			errx(1, "invalid major number");
    237 		if (unit_12_12_8(dev) != numbers[1])
    238 			errx(1, "invalid unit number");
    239 		if (subunit_12_12_8(dev) != numbers[2])
    240 			errx(1, "invalid subunit number");
    241 	} else
    242 		errx(1, "too many fields for format");
    243 	return (dev);
    244 }
    245 
    246 
    247 		/* list of formats and pack functions */
    248 		/* this list must be sorted lexically */
    249 struct format {
    250 	const char	*name;
    251 	pack_t		*pack;
    252 } formats[] = {
    253 	{"386bsd",  pack_8_8},
    254 	{"4bsd",    pack_8_8},
    255 	{"bsdos",   pack_bsdos},
    256 	{"freebsd", pack_freebsd},
    257 	{"hpux",    pack_8_24},
    258 	{"isc",     pack_8_8},
    259 	{"linux",   pack_8_8},
    260 	{"native",  pack_native},
    261 	{"netbsd",  pack_netbsd},
    262 	{"osf1",    pack_12_20},
    263 	{"sco",     pack_8_8},
    264 	{"solaris", pack_14_18},
    265 	{"sunos",   pack_8_8},
    266 	{"svr3",    pack_8_8},
    267 	{"svr4",    pack_14_18},
    268 	{"ultrix",  pack_8_8},
    269 };
    270 
    271 static int
    272 compare_format(const void *key, const void *element)
    273 {
    274 	const char		*name;
    275 	const struct format	*format;
    276 
    277 	name = key;
    278 	format = element;
    279 
    280 	return (strcmp(name, format->name));
    281 }
    282 
    283 
    284 pack_t *
    285 pack_find(const char *name)
    286 {
    287 	struct format	*format;
    288 
    289 	format = bsearch(name, formats,
    290 	    sizeof(formats)/sizeof(formats[0]),
    291 	    sizeof(formats[0]), compare_format);
    292 	if (format == 0)
    293 		return (NULL);
    294 	return (format->pack);
    295 }
    296