129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/*
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* Copyright (c) 2022 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* iso9660.h
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* Data structures for the ISO 9660 filesystem.
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*/
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#ifndef ISO9660_H
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#define ISO9660_H
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#include <stdint.h>
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const uint8_t TYPE_BOOT_RECORD = 0x00;
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const uint8_t TYPE_PRIMARY_VOLUME_DESCRIPTOR = 0x01;
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const uint8_t TYPE_VOLUME_DESCRIPTOR_SET_TERMINATOR = 0xFF;
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struct iso9660_pvd /* primary volume descriptor */
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{
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uint8_t type;
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char standard_identifier[5];
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uint8_t version;
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uint8_t unused1;
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char system_identifier[32];
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char volume_identifier[32];
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uint8_t unused2[8];
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uint32_t volume_space_size_le;
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uint32_t volume_space_size_be;
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uint8_t unused3[32];
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uint16_t volume_set_size_le;
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uint16_t volume_set_size_be;
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uint16_t volume_sequence_number_le;
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uint16_t volume_sequence_number_be;
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uint16_t logical_block_size_le;
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uint16_t logical_block_size_be;
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uint32_t path_table_size_le;
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uint32_t path_table_size_be;
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uint32_t path_table_lba_le;
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uint32_t path_table_opt_lba_le;
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uint32_t path_table_lba_be;
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uint32_t path_table_opt_lba_be;
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uint8_t root_dirent[34];
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char volume_set_identifier[128];
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char publisher_identifier[128];
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char data_preparer_identifier[128];
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char application_identifier[128];
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char copyright_file_identifier[37];
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char abstract_file_identifier[37];
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char bibliographic_file_identifier[37];
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char creation_datetime[17];
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char modification_datetime[17];
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char expiration_datetime[17];
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char effective_datetime[17];
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uint8_t file_structure_version;
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uint8_t unused4;
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uint8_t application_use[512];
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uint8_t reserved[653];
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};
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static_assert(sizeof(struct iso9660_pvd) == 2048,
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"sizeof(struct iso9660_pvd) == 2048");
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typedef uint64_t iso9660_ino_t;
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struct iso9660_dirent
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{
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uint8_t unused;
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};
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#define ISO9660_DIRENT_FLAG_DIR (1 << 1)
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#define ISO9660_S_IFMT (0170000)
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#define ISO9660_S_IFIFO (0010000)
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#define ISO9660_S_IFCHR (0020000)
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#define ISO9660_S_IFDIR (0040000)
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#define ISO9660_S_IFBLK (0060000)
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#define ISO9660_S_IFREG (0100000)
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#define ISO9660_S_IFLNK (0120000)
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#define ISO9660_S_IFSOCK (0140000)
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#define ISO9660_S_ISSOCK(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFSOCK)
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#define ISO9660_S_ISLNK(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFLNK)
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#define ISO9660_S_ISREG(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFREG)
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#define ISO9660_S_ISBLK(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFBLK)
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#define ISO9660_S_ISDIR(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFDIR)
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#define ISO9660_S_ISCHR(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFCHR)
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#define ISO9660_S_ISFIFO(mode) (((mode) & ISO9660_S_IFMT) == ISO9660_S_IFIFO)
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static const uint8_t ISO9660_FT_UNKNOWN = 0;
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static const uint8_t ISO9660_FT_REG_FILE = 1;
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static const uint8_t ISO9660_FT_DIR = 2;
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static const uint8_t ISO9660_FT_CHRDEV = 3;
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static const uint8_t ISO9660_FT_BLKDEV = 4;
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static const uint8_t ISO9660_FT_FIFO = 5;
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static const uint8_t ISO9660_FT_SOCK = 6;
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static const uint8_t ISO9660_FT_SYMLINK = 7;
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static inline uint8_t ISO9660_FT_OF_MODE(mode_t mode)
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{
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if ( ISO9660_S_ISREG(mode) )
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return ISO9660_FT_REG_FILE;
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if ( ISO9660_S_ISDIR(mode) )
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return ISO9660_FT_DIR;
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if ( ISO9660_S_ISCHR(mode) )
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return ISO9660_FT_CHRDEV;
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if ( ISO9660_S_ISBLK(mode) )
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return ISO9660_FT_BLKDEV;
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if ( ISO9660_S_ISFIFO(mode) )
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return ISO9660_FT_FIFO;
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if ( ISO9660_S_ISSOCK(mode) )
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return ISO9660_FT_SOCK;
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if ( ISO9660_S_ISLNK(mode) )
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return ISO9660_FT_SYMLINK;
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return ISO9660_FT_UNKNOWN;
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}
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#endif
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