Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/cd9660/iso.h
Version:
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1 /* $NetBSD: iso.h,v 1.2 2003/08/07 16:31:36 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)iso.h 8.6 (Berkeley) 5/10/95 37 */ 38 39 /* 40 * Definitions describing ISO9660 file system structure, as well as 41 * the functions necessary to access fields of ISO9660 file system 42 * structures. 43 */ 44 45 #define ISODCL(from, to) (to - from + 1) 46 47 struct iso_volume_descriptor { 48 char type[ISODCL(1,1)]; /* 711 */ 49 char id[ISODCL(2,6)]; 50 char version[ISODCL(7,7)]; 51 char data[ISODCL(8,2048)]; 52 }; 53 54 /* volume descriptor types */ 55 #define ISO_VD_PRIMARY 1 56 #define ISO_VD_SUPPLEMENTARY 2 57 #define ISO_VD_END 255 58 59 #define ISO_STANDARD_ID "CD001" 60 #define ISO_ECMA_ID "CDW01" 61 62 struct iso_primary_descriptor { 63 char type [ISODCL ( 1, 1)]; /* 711 */ 64 char id [ISODCL ( 2, 6)]; 65 char version [ISODCL ( 7, 7)]; /* 711 */ 66 char unused1 [ISODCL ( 8, 8)]; 67 char system_id [ISODCL ( 9, 40)]; /* achars */ 68 char volume_id [ISODCL ( 41, 72)]; /* dchars */ 69 char unused2 [ISODCL ( 73, 80)]; 70 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */ 71 char unused3 [ISODCL ( 89, 120)]; 72 char volume_set_size [ISODCL (121, 124)]; /* 723 */ 73 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */ 74 char logical_block_size [ISODCL (129, 132)]; /* 723 */ 75 char path_table_size [ISODCL (133, 140)]; /* 733 */ 76 char type_l_path_table [ISODCL (141, 144)]; /* 731 */ 77 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */ 78 char type_m_path_table [ISODCL (149, 152)]; /* 732 */ 79 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */ 80 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */ 81 char volume_set_id [ISODCL (191, 318)]; /* dchars */ 82 char publisher_id [ISODCL (319, 446)]; /* achars */ 83 char preparer_id [ISODCL (447, 574)]; /* achars */ 84 char application_id [ISODCL (575, 702)]; /* achars */ 85 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */ 86 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */ 87 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */ 88 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */ 89 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */ 90 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */ 91 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */ 92 char file_structure_version [ISODCL (882, 882)]; /* 711 */ 93 char unused4 [ISODCL (883, 883)]; 94 char application_data [ISODCL (884, 1395)]; 95 char unused5 [ISODCL (1396, 2048)]; 96 }; 97 #define ISO_DEFAULT_BLOCK_SIZE 2048 98 99 struct iso_supplementary_descriptor { 100 char type [ISODCL ( 1, 1)]; /* 711 */ 101 char id [ISODCL ( 2, 6)]; 102 char version [ISODCL ( 7, 7)]; /* 711 */ 103 char flags [ISODCL ( 8, 8)]; /* 711? */ 104 char system_id [ISODCL ( 9, 40)]; /* achars */ 105 char volume_id [ISODCL ( 41, 72)]; /* dchars */ 106 char unused2 [ISODCL ( 73, 80)]; 107 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */ 108 char escape [ISODCL ( 89, 120)]; 109 char volume_set_size [ISODCL (121, 124)]; /* 723 */ 110 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */ 111 char logical_block_size [ISODCL (129, 132)]; /* 723 */ 112 char path_table_size [ISODCL (133, 140)]; /* 733 */ 113 char type_l_path_table [ISODCL (141, 144)]; /* 731 */ 114 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */ 115 char type_m_path_table [ISODCL (149, 152)]; /* 732 */ 116 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */ 117 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */ 118 char volume_set_id [ISODCL (191, 318)]; /* dchars */ 119 char publisher_id [ISODCL (319, 446)]; /* achars */ 120 char preparer_id [ISODCL (447, 574)]; /* achars */ 121 char application_id [ISODCL (575, 702)]; /* achars */ 122 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */ 123 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */ 124 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */ 125 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */ 126 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */ 127 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */ 128 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */ 129 char file_structure_version [ISODCL (882, 882)]; /* 711 */ 130 char unused4 [ISODCL (883, 883)]; 131 char application_data [ISODCL (884, 1395)]; 132 char unused5 [ISODCL (1396, 2048)]; 133 }; 134 135 struct iso_directory_record { 136 char length [ISODCL (1, 1)]; /* 711 */ 137 char ext_attr_length [ISODCL (2, 2)]; /* 711 */ 138 u_char extent [ISODCL (3, 10)]; /* 733 */ 139 u_char size [ISODCL (11, 18)]; /* 733 */ 140 char date [ISODCL (19, 25)]; /* 7 by 711 */ 141 char flags [ISODCL (26, 26)]; 142 char file_unit_size [ISODCL (27, 27)]; /* 711 */ 143 char interleave [ISODCL (28, 28)]; /* 711 */ 144 char volume_sequence_number [ISODCL (29, 32)]; /* 723 */ 145 char name_len [ISODCL (33, 33)]; /* 711 */ 146 char name [1]; /* XXX */ 147 }; 148 /* can't take sizeof(iso_directory_record), because of possible alignment 149 of the last entry (34 instead of 33) */ 150 #define ISO_DIRECTORY_RECORD_SIZE 33 151 152 struct iso_extended_attributes { 153 u_char owner [ISODCL (1, 4)]; /* 723 */ 154 u_char group [ISODCL (5, 8)]; /* 723 */ 155 u_char perm [ISODCL (9, 10)]; /* 9.5.3 */ 156 char ctime [ISODCL (11, 27)]; /* 8.4.26.1 */ 157 char mtime [ISODCL (28, 44)]; /* 8.4.26.1 */ 158 char xtime [ISODCL (45, 61)]; /* 8.4.26.1 */ 159 char ftime [ISODCL (62, 78)]; /* 8.4.26.1 */ 160 char recfmt [ISODCL (79, 79)]; /* 711 */ 161 char recattr [ISODCL (80, 80)]; /* 711 */ 162 u_char reclen [ISODCL (81, 84)]; /* 723 */ 163 char system_id [ISODCL (85, 116)]; /* achars */ 164 char system_use [ISODCL (117, 180)]; 165 char version [ISODCL (181, 181)]; /* 711 */ 166 char len_esc [ISODCL (182, 182)]; /* 711 */ 167 char reserved [ISODCL (183, 246)]; 168 u_char len_au [ISODCL (247, 250)]; /* 723 */ 169 }; 170 171 static __inline int isonum_711 __P((u_char *)) __attribute__ ((unused)); 172 static __inline int isonum_712 __P((char *)) __attribute__ ((unused)); 173 static __inline int isonum_721 __P((u_char *)) __attribute__ ((unused)); 174 static __inline int isonum_722 __P((u_char *)) __attribute__ ((unused)); 175 static __inline int isonum_723 __P((u_char *)) __attribute__ ((unused)); 176 static __inline int isonum_731 __P((u_char *)) __attribute__ ((unused)); 177 static __inline int isonum_732 __P((u_char *)) __attribute__ ((unused)); 178 static __inline int isonum_733 __P((u_char *)) __attribute__ ((unused)); 179 180 /* 7.1.1: unsigned char */ 181 static __inline int 182 #if __STDC__ 183 isonum_711(u_char *p) 184 #else 185 isonum_711(p) 186 u_char *p; 187 #endif 188 { 189 return *p; 190 } 191 192 /* 7.1.2: signed(?) char */ 193 static __inline int 194 #if __STDC__ 195 isonum_712(char *p) 196 #else 197 isonum_712(p) 198 char *p; 199 #endif 200 { 201 return *p; 202 } 203 204 /* 7.2.1: unsigned little-endian 16-bit value. NOT USED IN KERNEL. */ 205 static __inline int 206 isonum_721(p) 207 u_char *p; 208 { 209 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN) 210 return *(u_int16t *)p; 211 #else 212 return *p|((char)p[1] << 8); 213 #endif 214 } 215 216 /* 7.2.2: unsigned big-endian 16-bit value. NOT USED IN KERNEL. */ 217 static __inline int 218 isonum_722(p) 219 unsigned char *p; 220 { 221 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN) 222 return *(u_int16t *)p; 223 #else 224 return ((char)*p << 8)|p[1]; 225 #endif 226 } 227 228 /* 7.2.3: unsigned both-endian (little, then big) 16-bit value */ 229 static __inline int 230 #if __STDC__ 231 isonum_723(u_char *p) 232 #else 233 isonum_723(p) 234 u_char *p; 235 #endif 236 { 237 #if defined(UNALIGNED_ACCESS) && \ 238 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN)) 239 #if BYTE_ORDER == LITTLE_ENDIAN 240 return *(u_int16t *)p; 241 #else 242 return *(u_int16t *)(p + 2); 243 #endif 244 #else /* !UNALIGNED_ACCESS or weird byte order */ 245 return *p|(p[1] << 8); 246 #endif 247 } 248 249 /* 7.3.1: unsigned little-endian 32-bit value. NOT USED IN KERNEL. */ 250 static __inline int 251 isonum_731(p) 252 u_char *p; 253 { 254 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == LITTLE_ENDIAN) 255 return *(u_int32t *)p; 256 #else 257 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24); 258 #endif 259 } 260 261 /* 7.3.2: unsigned big-endian 32-bit value. NOT USED IN KERNEL. */ 262 static __inline int 263 isonum_732(p) 264 unsigned char *p; 265 { 266 #if defined(UNALIGNED_ACCESS) && (BYTE_ORDER == BIG_ENDIAN) 267 return *(u_int32t *)p; 268 #else 269 return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3]; 270 #endif 271 } 272 273 /* 7.3.3: unsigned both-endian (little, then big) 32-bit value */ 274 static __inline int 275 #if __STDC__ 276 isonum_733(u_char *p) 277 #else 278 isonum_733(p) 279 u_char *p; 280 #endif 281 { 282 #if defined(UNALIGNED_ACCESS) && \ 283 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN)) 284 #if BYTE_ORDER == LITTLE_ENDIAN 285 return *(u_int32t *)p; 286 #else 287 return *(u_int32t *)(p + 4); 288 #endif 289 #else /* !UNALIGNED_ACCESS or weird byte order */ 290 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24); 291 #endif 292 } 293 294 /* 295 * Associated files have a leading '='. 296 */ 297 #define ASSOCCHAR '='
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