167 lines
4.4 KiB
C
167 lines
4.4 KiB
C
/*
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* ISO 9660 filesystem backend for GRUB (GRand Unified Bootloader)
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* including Rock Ridge Extensions support
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*
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* Copyright (C) 1998, 1999 Kousuke Takai <tak@kmc.kyoto-u.ac.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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/*
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* References:
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* linux/fs/isofs/rock.[ch]
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* mkisofs-1.11.1/diag/isoinfo.c
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* mkisofs-1.11.1/iso9660.h
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* (all are written by Eric Youngdale)
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*/
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/*
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* Modified by SONE Takeshi to work with FILO
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*/
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#ifndef _ISO9660_H_
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#define _ISO9660_H_
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#define ISO_SECTOR_BITS (11)
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#define ISO_SECTOR_SIZE (1<<ISO_SECTOR_BITS)
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#define ISO_REGULAR 1 /* regular file */
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#define ISO_DIRECTORY 2 /* directory */
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#define ISO_OTHER 0 /* other file (with Rock Ridge) */
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#define RR_FLAG_PX 0x01 /* have POSIX file attributes */
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#define RR_FLAG_NM 0x08 /* have alternate file name */
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/* POSIX file attributes for Rock Ridge extensions */
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#define POSIX_S_IFMT 0xF000
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#define POSIX_S_IFREG 0x8000
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#define POSIX_S_IFDIR 0x4000
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/* volume descriptor types */
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#define ISO_VD_PRIMARY 1
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#define ISO_VD_END 255
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#define ISO_STANDARD_ID "CD001"
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#ifndef ASM_FILE
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typedef union {
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uint8_t l,b;
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} iso_8bit_t;
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typedef struct __iso_16bit {
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uint16_t l, b;
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} iso_16bit_t;
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typedef struct __iso_32bit {
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uint32_t l, b;
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} iso_32bit_t;
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typedef uint8_t iso_date_t[7];
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struct iso_directory_record {
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iso_8bit_t length;
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iso_8bit_t ext_attr_length;
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iso_32bit_t extent;
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iso_32bit_t size;
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iso_date_t date;
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iso_8bit_t flags;
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iso_8bit_t file_unit_size;
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iso_8bit_t interleave;
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iso_16bit_t volume_seq_number;
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iso_8bit_t name_len;
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uint8_t name[1];
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} __attribute__ ((packed));
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struct iso_primary_descriptor {
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iso_8bit_t type;
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uint8_t id[5];
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iso_8bit_t version;
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uint8_t _unused1[1];
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uint8_t system_id[32];
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uint8_t volume_id[32];
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uint8_t _unused2[8];
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iso_32bit_t volume_space_size;
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uint8_t _unused3[32];
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iso_16bit_t volume_set_size;
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iso_16bit_t volume_seq_number;
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iso_16bit_t logical_block_size;
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iso_32bit_t path_table_size;
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uint8_t type_l_path_table[4];
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uint8_t opt_type_l_path_table[4];
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uint8_t type_m_path_table[4];
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uint8_t opt_type_m_path_table[4];
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struct iso_directory_record root_directory_record;
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uint8_t volume_set_id[128];
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uint8_t publisher_id[128];
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uint8_t preparer_id[128];
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uint8_t application_id[128];
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uint8_t copyright_file_id[37];
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uint8_t abstract_file_id[37];
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uint8_t bibliographic_file_id[37];
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uint8_t creation_date[17];
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uint8_t modification_date[17];
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uint8_t expiration_date[17];
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uint8_t effective_date[17];
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iso_8bit_t file_structure_version;
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uint8_t _unused4[1];
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uint8_t application_data[512];
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uint8_t _unused5[653];
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} __attribute__ ((packed));
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struct rock_ridge {
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uint16_t signature;
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uint8_t len;
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uint8_t version;
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union {
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struct CE {
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iso_32bit_t extent;
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iso_32bit_t offset;
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iso_32bit_t size;
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} ce;
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struct NM {
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iso_8bit_t flags;
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uint8_t name[0];
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} nm;
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struct PX {
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iso_32bit_t mode;
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iso_32bit_t nlink;
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iso_32bit_t uid;
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iso_32bit_t gid;
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} px;
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struct RR {
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iso_8bit_t flags;
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} rr;
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} u;
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} __attribute__ ((packed));
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typedef union RR_ptr {
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struct rock_ridge *rr;
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char *ptr;
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int i;
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} RR_ptr_t;
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#define CHECK2(ptr, c1, c2) \
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(*(unsigned char *)(ptr) == (c1) && \
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*((unsigned char *)(ptr) + 1) == (c2))
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#define CHECK4(ptr, c1, c2, c3, c4) \
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(*(unsigned char *)(ptr) == (c1) && \
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*((unsigned char *)(ptr) + 1) == (c2) && \
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*((unsigned char *)(ptr) + 2) == (c3) && \
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*((unsigned char *)(ptr) + 3) == (c4))
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#endif /* !ASM_FILE */
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#endif /* _ISO9660_H_ */
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