1 /** $MirOS: src/sys/isofs/cd9660/iso.h,v 1.3 2013/10/31 20:06:57 tg Exp $ */
2 /* $OpenBSD: iso.h,v 1.13 2003/06/02 23:28:05 millert Exp $ */
3 /* $NetBSD: iso.h,v 1.20 1997/07/07 22:45:34 cgd Exp $ */
4
5 /*-
6 * Copyright © 2013
7 * Thorsten “mirabilos” Glaser <tg@mirbsd.org>
8 * Copyright (c) 1994
9 * The Regents of the University of California. All rights reserved.
10 *
11 * This code is derived from software contributed to Berkeley
12 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
13 * Support code is derived from software contributed to Berkeley
14 * by Atsushi Murai (amurai@spec.co.jp).
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)iso.h 8.4 (Berkeley) 12/5/94
41 */
42
43 /*
44 * Definitions describing ISO9660 file system structure, as well as
45 * the functions necessary to access fields of ISO9660 file system
46 * structures.
47 */
48
49 #define ISODCL(from, to) (to - from + 1)
50
51 struct iso_volume_descriptor {
52 char type[ISODCL(1,1)]; /* 711 */
53 char id[ISODCL(2,6)];
54 char version[ISODCL(7,7)];
55 char data[ISODCL(8,2048)];
56 };
57
58 /* volume descriptor types */
59 #define ISO_VD_PRIMARY 1
60 #define ISO_VD_SUPPLEMENTARY 2
61 #define ISO_VD_END 255
62
63 #define ISO_STANDARD_ID "CD001"
64 #define ISO_ECMA_ID "CDW01"
65
66 struct iso_primary_descriptor {
67 char type [ISODCL ( 1, 1)]; /* 711 */
68 char id [ISODCL ( 2, 6)];
69 char version [ISODCL ( 7, 7)]; /* 711 */
70 char unused1 [ISODCL ( 8, 8)];
71 char system_id [ISODCL ( 9, 40)]; /* achars */
72 char volume_id [ISODCL ( 41, 72)]; /* dchars */
73 char unused2 [ISODCL ( 73, 80)];
74 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
75 char unused3 [ISODCL ( 89, 120)];
76 char volume_set_size [ISODCL (121, 124)]; /* 723 */
77 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
78 char logical_block_size [ISODCL (129, 132)]; /* 723 */
79 char path_table_size [ISODCL (133, 140)]; /* 733 */
80 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
81 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
82 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
83 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
84 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
85 char volume_set_id [ISODCL (191, 318)]; /* dchars */
86 char publisher_id [ISODCL (319, 446)]; /* achars */
87 char preparer_id [ISODCL (447, 574)]; /* achars */
88 char application_id [ISODCL (575, 702)]; /* achars */
89 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
90 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
91 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
92 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
93 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
94 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
95 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
96 char file_structure_version [ISODCL (882, 882)]; /* 711 */
97 char unused4 [ISODCL (883, 883)];
98 char application_data [ISODCL (884, 1395)];
99 char unused5 [ISODCL (1396, 2048)];
100 };
101 #define ISO_DEFAULT_BLOCK_SHIFT 11
102 #define ISO_DEFAULT_BLOCK_SIZE (1<<ISO_DEFAULT_BLOCK_SHIFT)
103
104 /*
105 * Used by Microsoft Joliet extension to ISO9660. Almost the same
106 * as PVD, but byte position 8 is a flag, and 89-120 is for escape.
107 */
108
109 struct iso_supplementary_descriptor {
110 char type [ISODCL ( 1, 1)]; /* 711 */
111 char id [ISODCL ( 2, 6)];
112 char version [ISODCL ( 7, 7)]; /* 711 */
113 char flags [ISODCL ( 8, 8)];
114 char system_id [ISODCL ( 9, 40)]; /* achars */
115 char volume_id [ISODCL ( 41, 72)]; /* dchars */
116 char unused2 [ISODCL ( 73, 80)];
117 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
118 char escape [ISODCL ( 89, 120)];
119 char volume_set_size [ISODCL (121, 124)]; /* 723 */
120 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
121 char logical_block_size [ISODCL (129, 132)]; /* 723 */
122 char path_table_size [ISODCL (133, 140)]; /* 733 */
123 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
124 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
125 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
126 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
127 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
128 char volume_set_id [ISODCL (191, 318)]; /* dchars */
129 char publisher_id [ISODCL (319, 446)]; /* achars */
130 char preparer_id [ISODCL (447, 574)]; /* achars */
131 char application_id [ISODCL (575, 702)]; /* achars */
132 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
133 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
134 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
135 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
136 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
137 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
138 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
139 char file_structure_version [ISODCL (882, 882)]; /* 711 */
140 char unused4 [ISODCL (883, 883)];
141 char application_data [ISODCL (884, 1395)];
142 char unused5 [ISODCL (1396, 2048)];
143 };
144
145 struct iso_directory_record {
146 char length [ISODCL (1, 1)]; /* 711 */
147 char ext_attr_length [ISODCL (2, 2)]; /* 711 */
148 u_char extent [ISODCL (3, 10)]; /* 733 */
149 u_char size [ISODCL (11, 18)]; /* 733 */
150 char date [ISODCL (19, 25)]; /* 7 by 711 */
151 char flags [ISODCL (26, 26)];
152 char file_unit_size [ISODCL (27, 27)]; /* 711 */
153 char interleave [ISODCL (28, 28)]; /* 711 */
154 char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
155 char name_len [ISODCL (33, 33)]; /* 711 */
156 char name [1]; /* XXX */
157 };
158 /* can't take sizeof(iso_directory_record), because of possible alignment
159 of the last entry (34 instead of 33) */
160 #define ISO_DIRECTORY_RECORD_SIZE 33
161
162 struct iso_extended_attributes {
163 u_char owner [ISODCL (1, 4)]; /* 723 */
164 u_char group [ISODCL (5, 8)]; /* 723 */
165 u_char perm [ISODCL (9, 10)]; /* 9.5.3 */
166 char ctime [ISODCL (11, 27)]; /* 8.4.26.1 */
167 char mtime [ISODCL (28, 44)]; /* 8.4.26.1 */
168 char xtime [ISODCL (45, 61)]; /* 8.4.26.1 */
169 char ftime [ISODCL (62, 78)]; /* 8.4.26.1 */
170 char recfmt [ISODCL (79, 79)]; /* 711 */
171 char recattr [ISODCL (80, 80)]; /* 711 */
172 u_char reclen [ISODCL (81, 84)]; /* 723 */
173 char system_id [ISODCL (85, 116)]; /* achars */
174 char system_use [ISODCL (117, 180)];
175 char version [ISODCL (181, 181)]; /* 711 */
176 char len_esc [ISODCL (182, 182)]; /* 711 */
177 char reserved [ISODCL (183, 246)];
178 u_char len_au [ISODCL (247, 250)]; /* 723 */
179 };
180
181 static __inline int isonum_711(u_char *) __attribute__((__unused__));
182 static __inline int isonum_712(char *) __attribute__((__unused__));
183 static __inline int isonum_721(u_char *) __attribute__((__unused__));
184 static __inline int isonum_722(u_char *) __attribute__((__unused__));
185 static __inline int isonum_723(u_char *) __attribute__((__unused__));
186 static __inline int isonum_731(u_char *) __attribute__((__unused__));
187 static __inline int isonum_732(u_char *) __attribute__((__unused__));
188 static __inline int isonum_733(u_char *) __attribute__((__unused__));
189
190 /* 7.1.1: unsigned char */
191 static __inline int
isonum_711(u_char * p)192 isonum_711(u_char *p)
193 {
194 return *p;
195 }
196
197 /* 7.1.2: signed(?) char */
198 static __inline int
isonum_712(char * p)199 isonum_712(char *p)
200 {
201 return *p;
202 }
203
204 /* 7.2.1: unsigned little-endian 16-bit value. NOT USED IN KERNEL. */
205 static __inline int
isonum_721(u_char * p)206 isonum_721(u_char *p)
207 {
208 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN)
209 return *(u_int16t *)p;
210 #else
211 return *p|((char)p[1] << 8);
212 #endif
213 }
214
215 /* 7.2.2: unsigned big-endian 16-bit value. NOT USED IN KERNEL. */
216 static __inline int
isonum_722(unsigned char * p)217 isonum_722(unsigned char *p)
218 {
219 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN)
220 return *(u_int16t *)p;
221 #else
222 return ((char)*p << 8)|p[1];
223 #endif
224 }
225
226 /* 7.2.3: unsigned both-endian (little, then big) 16-bit value */
227 static __inline int
isonum_723(u_char * p)228 isonum_723(u_char *p)
229 {
230 #if defined(UNALIGNED_ACCESS) && \
231 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
232 #if BYTE_ORDER == LITTLE_ENDIAN
233 return *(u_int16t *)p;
234 #else
235 return *(u_int16t *)(p + 2);
236 #endif
237 #else /* !UNALIGNED_ACCESS or weird byte order */
238 return *p|(p[1] << 8);
239 #endif
240 }
241
242 /* 7.3.1: unsigned little-endian 32-bit value. NOT USED IN KERNEL. */
243 static __inline int
isonum_731(u_char * p)244 isonum_731(u_char *p)
245 {
246 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN)
247 return *(u_int32t *)p;
248 #else
249 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
250 #endif
251 }
252
253 /* 7.3.2: unsigned big-endian 32-bit value. NOT USED IN KERNEL. */
254 static __inline int
isonum_732(unsigned char * p)255 isonum_732(unsigned char *p)
256 {
257 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN)
258 return *(u_int32t *)p;
259 #else
260 return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
261 #endif
262 }
263
264 /* 7.3.3: unsigned both-endian (little, then big) 32-bit value */
265 static __inline int
isonum_733(u_char * p)266 isonum_733(u_char *p)
267 {
268 #if defined(UNALIGNED_ACCESS) && \
269 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
270 #if BYTE_ORDER == LITTLE_ENDIAN
271 return *(u_int32t *)p;
272 #else
273 return *(u_int32t *)(p + 4);
274 #endif
275 #else /* !UNALIGNED_ACCESS or weird byte order */
276 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
277 #endif
278 }
279
280 /*
281 * Associated files have a leading '='.
282 */
283 #define ASSOCCHAR '='
284