Home | History | Annotate | Line # | Download | only in mknod
pack_dev.c revision 1.8 
      1 /*	$NetBSD: pack_dev.c,v 1.8 2004/05/11 17:09:58 christos 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 1.8 2004/05/11 17:09:58 christos Exp $");
     46 #endif /* not lint */
     47 
     48 #include <sys/types.h>
     49 #include <sys/stat.h>
     50 
     51 #include <limits.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <unistd.h>
     56 
     57 #include "pack_dev.h"
     58 
     59 static	pack_t	pack_netbsd;
     60 static	pack_t	pack_freebsd;
     61 static	pack_t	pack_8_8;
     62 static	pack_t	pack_12_20;
     63 static	pack_t	pack_14_18;
     64 static	pack_t	pack_8_24;
     65 static	pack_t	pack_bsdos;
     66 static	int	compare_format(const void *, const void *);
     67 
     68 static const char iMajorError[] = "invalid major number";
     69 static const char iMinorError[] = "invalid minor number";
     70 static const char tooManyFields[] = "too many fields for format";
     71 
     72 	/* exported */
     73 portdev_t
     74 pack_native(int n, u_long numbers[], const char **error)
     75 {
     76 	portdev_t dev = 0;
     77 
     78 	if (n == 2) {
     79 		dev = makedev(numbers[0], numbers[1]);
     80 		if (major(dev) != numbers[0])
     81 			*error = iMajorError;
     82 		else if (minor(dev) != numbers[1])
     83 			*error = iMinorError;
     84 	} else
     85 		*error = tooManyFields;
     86 	return (dev);
     87 }
     88 
     89 
     90 static portdev_t
     91 pack_netbsd(int n, u_long numbers[], const char **error)
     92 {
     93 	portdev_t dev = 0;
     94 
     95 	if (n == 2) {
     96 		dev = makedev_netbsd(numbers[0], numbers[1]);
     97 		if (major_netbsd(dev) != numbers[0])
     98 			*error = iMajorError;
     99 		else if (minor_netbsd(dev) != numbers[1])
    100 			*error = iMinorError;
    101 	} else
    102 		*error = tooManyFields;
    103 	return (dev);
    104 }
    105 
    106 
    107 #define	major_freebsd(x)	((int32_t)(((x) & 0x0000ff00) >> 8))
    108 #define	minor_freebsd(x)	((int32_t)(((x) & 0xffff00ff) >> 0))
    109 #define	makedev_freebsd(x,y)	((portdev_t)((((x) << 8) & 0x0000ff00) | \
    110 					 (((y) << 0) & 0xffff00ff)))
    111 
    112 static portdev_t
    113 pack_freebsd(int n, u_long numbers[], const char **error)
    114 {
    115 	portdev_t dev = 0;
    116 
    117 	if (n == 2) {
    118 		dev = makedev_freebsd(numbers[0], numbers[1]);
    119 		if (major_freebsd(dev) != numbers[0])
    120 			*error = iMajorError;
    121 		if (minor_freebsd(dev) != numbers[1])
    122 			*error = iMinorError;
    123 	} else
    124 		*error = tooManyFields;
    125 	return (dev);
    126 }
    127 
    128 
    129 #define	major_8_8(x)		((int32_t)(((x) & 0x0000ff00) >> 8))
    130 #define	minor_8_8(x)		((int32_t)(((x) & 0x000000ff) >> 0))
    131 #define	makedev_8_8(x,y)	((portdev_t)((((x) << 8) & 0x0000ff00) | \
    132 					 (((y) << 0) & 0x000000ff)))
    133 
    134 static portdev_t
    135 pack_8_8(int n, u_long numbers[], const char **error)
    136 {
    137 	portdev_t dev = 0;
    138 
    139 	if (n == 2) {
    140 		dev = makedev_8_8(numbers[0], numbers[1]);
    141 		if (major_8_8(dev) != numbers[0])
    142 			*error = iMajorError;
    143 		if (minor_8_8(dev) != numbers[1])
    144 			*error = iMinorError;
    145 	} else
    146 		*error = tooManyFields;
    147 	return (dev);
    148 }
    149 
    150 
    151 #define	major_12_20(x)		((int32_t)(((x) & 0xfff00000) >> 20))
    152 #define	minor_12_20(x)		((int32_t)(((x) & 0x000fffff) >>  0))
    153 #define	makedev_12_20(x,y)	((portdev_t)((((x) << 20) & 0xfff00000) | \
    154 					 (((y) <<  0) & 0x000fffff)))
    155 
    156 static portdev_t
    157 pack_12_20(int n, u_long numbers[], const char **error)
    158 {
    159 	portdev_t dev = 0;
    160 
    161 	if (n == 2) {
    162 		dev = makedev_12_20(numbers[0], numbers[1]);
    163 		if (major_12_20(dev) != numbers[0])
    164 			*error = iMajorError;
    165 		if (minor_12_20(dev) != numbers[1])
    166 			*error = iMinorError;
    167 	} else
    168 		*error = tooManyFields;
    169 	return (dev);
    170 }
    171 
    172 
    173 #define	major_14_18(x)		((int32_t)(((x) & 0xfffc0000) >> 18))
    174 #define	minor_14_18(x)		((int32_t)(((x) & 0x0003ffff) >>  0))
    175 #define	makedev_14_18(x,y)	((portdev_t)((((x) << 18) & 0xfffc0000) | \
    176 					 (((y) <<  0) & 0x0003ffff)))
    177 
    178 static portdev_t
    179 pack_14_18(int n, u_long numbers[], const char **error)
    180 {
    181 	portdev_t dev = 0;
    182 
    183 	if (n == 2) {
    184 		dev = makedev_14_18(numbers[0], numbers[1]);
    185 		if (major_14_18(dev) != numbers[0])
    186 			*error = iMajorError;
    187 		if (minor_14_18(dev) != numbers[1])
    188 			*error = iMinorError;
    189 	} else
    190 		*error = tooManyFields;
    191 	return (dev);
    192 }
    193 
    194 
    195 #define	major_8_24(x)		((int32_t)(((x) & 0xff000000) >> 24))
    196 #define	minor_8_24(x)		((int32_t)(((x) & 0x00ffffff) >>  0))
    197 #define	makedev_8_24(x,y)	((portdev_t)((((x) << 24) & 0xff000000) | \
    198 					 (((y) <<  0) & 0x00ffffff)))
    199 
    200 static portdev_t
    201 pack_8_24(int n, u_long numbers[], const char **error)
    202 {
    203 	portdev_t dev = 0;
    204 
    205 	if (n == 2) {
    206 		dev = makedev_8_24(numbers[0], numbers[1]);
    207 		if (major_8_24(dev) != numbers[0])
    208 			*error = iMajorError;
    209 		if (minor_8_24(dev) != numbers[1])
    210 			*error = iMinorError;
    211 	} else
    212 		*error = tooManyFields;
    213 	return (dev);
    214 }
    215 
    216 
    217 #define	major_12_12_8(x)	((int32_t)(((x) & 0xfff00000) >> 20))
    218 #define	unit_12_12_8(x)		((int32_t)(((x) & 0x000fff00) >>  8))
    219 #define	subunit_12_12_8(x)	((int32_t)(((x) & 0x000000ff) >>  0))
    220 #define	makedev_12_12_8(x,y,z)	((portdev_t)((((x) << 20) & 0xfff00000) | \
    221 					 (((y) <<  8) & 0x000fff00) | \
    222 					 (((z) <<  0) & 0x000000ff)))
    223 
    224 static portdev_t
    225 pack_bsdos(int n, u_long numbers[], const char **error)
    226 {
    227 	portdev_t dev = 0;
    228 
    229 	if (n == 2) {
    230 		dev = makedev_12_20(numbers[0], numbers[1]);
    231 		if (major_12_20(dev) != numbers[0])
    232 			*error = iMajorError;
    233 		if (minor_12_20(dev) != numbers[1])
    234 			*error = iMinorError;
    235 	} else if (n == 3) {
    236 		dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
    237 		if (major_12_12_8(dev) != numbers[0])
    238 			*error = iMajorError;
    239 		if (unit_12_12_8(dev) != numbers[1])
    240 			*error = "invalid unit number";
    241 		if (subunit_12_12_8(dev) != numbers[2])
    242 			*error = "invalid subunit number";
    243 	} else
    244 		*error = tooManyFields;
    245 	return (dev);
    246 }
    247 
    248 
    249 		/* list of formats and pack functions */
    250 		/* this list must be sorted lexically */
    251 struct format {
    252 	const char	*name;
    253 	pack_t		*pack;
    254 } formats[] = {
    255 	{"386bsd",  pack_8_8},
    256 	{"4bsd",    pack_8_8},
    257 	{"bsdos",   pack_bsdos},
    258 	{"freebsd", pack_freebsd},
    259 	{"hpux",    pack_8_24},
    260 	{"isc",     pack_8_8},
    261 	{"linux",   pack_8_8},
    262 	{"native",  pack_native},
    263 	{"netbsd",  pack_netbsd},
    264 	{"osf1",    pack_12_20},
    265 	{"sco",     pack_8_8},
    266 	{"solaris", pack_14_18},
    267 	{"sunos",   pack_8_8},
    268 	{"svr3",    pack_8_8},
    269 	{"svr4",    pack_14_18},
    270 	{"ultrix",  pack_8_8},
    271 };
    272 
    273 static int
    274 compare_format(const void *key, const void *element)
    275 {
    276 	const char		*name;
    277 	const struct format	*format;
    278 
    279 	name = key;
    280 	format = element;
    281 
    282 	return (strcmp(name, format->name));
    283 }
    284 
    285 
    286 pack_t *
    287 pack_find(const char *name)
    288 {
    289 	struct format	*format;
    290 
    291 	format = bsearch(name, formats,
    292 	    sizeof(formats)/sizeof(formats[0]),
    293 	    sizeof(formats[0]), compare_format);
    294 	if (format == 0)
    295 		return (NULL);
    296 	return (format->pack);
    297 }
    298