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 #include <sys/param.h>
33 #include <sys/stat.h>
34
35 #include <limits.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include "pack_dev.h"
42
43 static pack_t pack_netbsd;
44 static pack_t pack_freebsd;
45 static pack_t pack_8_8;
46 static pack_t pack_12_20;
47 static pack_t pack_14_18;
48 static pack_t pack_8_24;
49 static pack_t pack_bsdos;
50 static int compare_format(const void *, const void *);
51
52 static const char iMajorError[] = "invalid major number";
53 static const char iMinorError[] = "invalid minor number";
54 static const char tooManyFields[] = "too many fields for format";
55
56 /* exported */
57 dev_t
pack_native(int n,u_long numbers[],const char ** error)58 pack_native(int n, u_long numbers[], const char **error)
59 {
60 dev_t dev = 0;
61
62 if (n == 2) {
63 dev = makedev(numbers[0], numbers[1]);
64 if ((u_long)major(dev) != numbers[0])
65 *error = iMajorError;
66 else if ((u_long)minor(dev) != numbers[1])
67 *error = iMinorError;
68 } else
69 *error = tooManyFields;
70 return (dev);
71 }
72
73
74 static dev_t
pack_netbsd(int n,u_long numbers[],const char ** error)75 pack_netbsd(int n, u_long numbers[], const char **error)
76 {
77 dev_t dev = 0;
78
79 if (n == 2) {
80 dev = makedev_netbsd(numbers[0], numbers[1]);
81 if ((u_long)major_netbsd(dev) != numbers[0])
82 *error = iMajorError;
83 else if ((u_long)minor_netbsd(dev) != numbers[1])
84 *error = iMinorError;
85 } else
86 *error = tooManyFields;
87 return (dev);
88 }
89
90
91 #define major_freebsd(x) ((int32_t)(((x) & 0x0000ff00) >> 8))
92 #define minor_freebsd(x) ((int32_t)(((x) & 0xffff00ff) >> 0))
93 #define makedev_freebsd(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \
94 (((y) << 0) & 0xffff00ff)))
95
96 static dev_t
pack_freebsd(int n,u_long numbers[],const char ** error)97 pack_freebsd(int n, u_long numbers[], const char **error)
98 {
99 dev_t dev = 0;
100
101 if (n == 2) {
102 dev = makedev_freebsd(numbers[0], numbers[1]);
103 if ((u_long)major_freebsd(dev) != numbers[0])
104 *error = iMajorError;
105 if ((u_long)minor_freebsd(dev) != numbers[1])
106 *error = iMinorError;
107 } else
108 *error = tooManyFields;
109 return (dev);
110 }
111
112
113 #define major_8_8(x) ((int32_t)(((x) & 0x0000ff00) >> 8))
114 #define minor_8_8(x) ((int32_t)(((x) & 0x000000ff) >> 0))
115 #define makedev_8_8(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \
116 (((y) << 0) & 0x000000ff)))
117
118 static dev_t
pack_8_8(int n,u_long numbers[],const char ** error)119 pack_8_8(int n, u_long numbers[], const char **error)
120 {
121 dev_t dev = 0;
122
123 if (n == 2) {
124 dev = makedev_8_8(numbers[0], numbers[1]);
125 if ((u_long)major_8_8(dev) != numbers[0])
126 *error = iMajorError;
127 if ((u_long)minor_8_8(dev) != numbers[1])
128 *error = iMinorError;
129 } else
130 *error = tooManyFields;
131 return (dev);
132 }
133
134
135 #define major_12_20(x) ((int32_t)(((x) & 0xfff00000) >> 20))
136 #define minor_12_20(x) ((int32_t)(((x) & 0x000fffff) >> 0))
137 #define makedev_12_20(x,y) ((dev_t)((((x) << 20) & 0xfff00000) | \
138 (((y) << 0) & 0x000fffff)))
139
140 static dev_t
pack_12_20(int n,u_long numbers[],const char ** error)141 pack_12_20(int n, u_long numbers[], const char **error)
142 {
143 dev_t dev = 0;
144
145 if (n == 2) {
146 dev = makedev_12_20(numbers[0], numbers[1]);
147 if ((u_long)major_12_20(dev) != numbers[0])
148 *error = iMajorError;
149 if ((u_long)minor_12_20(dev) != numbers[1])
150 *error = iMinorError;
151 } else
152 *error = tooManyFields;
153 return (dev);
154 }
155
156
157 #define major_14_18(x) ((int32_t)(((x) & 0xfffc0000) >> 18))
158 #define minor_14_18(x) ((int32_t)(((x) & 0x0003ffff) >> 0))
159 #define makedev_14_18(x,y) ((dev_t)((((x) << 18) & 0xfffc0000) | \
160 (((y) << 0) & 0x0003ffff)))
161
162 static dev_t
pack_14_18(int n,u_long numbers[],const char ** error)163 pack_14_18(int n, u_long numbers[], const char **error)
164 {
165 dev_t dev = 0;
166
167 if (n == 2) {
168 dev = makedev_14_18(numbers[0], numbers[1]);
169 if ((u_long)major_14_18(dev) != numbers[0])
170 *error = iMajorError;
171 if ((u_long)minor_14_18(dev) != numbers[1])
172 *error = iMinorError;
173 } else
174 *error = tooManyFields;
175 return (dev);
176 }
177
178
179 #define major_8_24(x) ((int32_t)(((x) & 0xff000000) >> 24))
180 #define minor_8_24(x) ((int32_t)(((x) & 0x00ffffff) >> 0))
181 #define makedev_8_24(x,y) ((dev_t)((((x) << 24) & 0xff000000) | \
182 (((y) << 0) & 0x00ffffff)))
183
184 static dev_t
pack_8_24(int n,u_long numbers[],const char ** error)185 pack_8_24(int n, u_long numbers[], const char **error)
186 {
187 dev_t dev = 0;
188
189 if (n == 2) {
190 dev = makedev_8_24(numbers[0], numbers[1]);
191 if ((u_long)major_8_24(dev) != numbers[0])
192 *error = iMajorError;
193 if ((u_long)minor_8_24(dev) != numbers[1])
194 *error = iMinorError;
195 } else
196 *error = tooManyFields;
197 return (dev);
198 }
199
200
201 #define major_12_12_8(x) ((int32_t)(((x) & 0xfff00000) >> 20))
202 #define unit_12_12_8(x) ((int32_t)(((x) & 0x000fff00) >> 8))
203 #define subunit_12_12_8(x) ((int32_t)(((x) & 0x000000ff) >> 0))
204 #define makedev_12_12_8(x,y,z) ((dev_t)((((x) << 20) & 0xfff00000) | \
205 (((y) << 8) & 0x000fff00) | \
206 (((z) << 0) & 0x000000ff)))
207
208 static dev_t
pack_bsdos(int n,u_long numbers[],const char ** error)209 pack_bsdos(int n, u_long numbers[], const char **error)
210 {
211 dev_t dev = 0;
212
213 if (n == 2) {
214 dev = makedev_12_20(numbers[0], numbers[1]);
215 if ((u_long)major_12_20(dev) != numbers[0])
216 *error = iMajorError;
217 if ((u_long)minor_12_20(dev) != numbers[1])
218 *error = iMinorError;
219 } else if (n == 3) {
220 dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
221 if ((u_long)major_12_12_8(dev) != numbers[0])
222 *error = iMajorError;
223 if ((u_long)unit_12_12_8(dev) != numbers[1])
224 *error = "invalid unit number";
225 if ((u_long)subunit_12_12_8(dev) != numbers[2])
226 *error = "invalid subunit number";
227 } else
228 *error = tooManyFields;
229 return (dev);
230 }
231
232
233 /* list of formats and pack functions */
234 /* this list must be sorted lexically */
235 static struct format {
236 const char *name;
237 pack_t *pack;
238 } formats[] = {
239 {"386bsd", pack_8_8},
240 {"4bsd", pack_8_8},
241 {"bsdos", pack_bsdos},
242 {"freebsd", pack_freebsd},
243 {"hpux", pack_8_24},
244 {"isc", pack_8_8},
245 {"linux", pack_8_8},
246 {"native", pack_native},
247 {"netbsd", pack_netbsd},
248 {"osf1", pack_12_20},
249 {"sco", pack_8_8},
250 {"solaris", pack_14_18},
251 {"sunos", pack_8_8},
252 {"svr3", pack_8_8},
253 {"svr4", pack_14_18},
254 {"ultrix", pack_8_8},
255 };
256
257 static int
compare_format(const void * key,const void * element)258 compare_format(const void *key, const void *element)
259 {
260 const char *name;
261 const struct format *format;
262
263 name = key;
264 format = element;
265
266 return (strcmp(name, format->name));
267 }
268
269
270 pack_t *
pack_find(const char * name)271 pack_find(const char *name)
272 {
273 struct format *format;
274
275 format = bsearch(name, formats,
276 sizeof(formats)/sizeof(formats[0]),
277 sizeof(formats[0]), compare_format);
278 if (format == NULL)
279 return (NULL);
280 return (format->pack);
281 }
282