/* * Copyright (c) 2007 Vreixo Formoso * Copyright (c) 2009 Thomas Schmitt * * This file is part of the libisofs project; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * or later as published by the Free Software Foundation. * See COPYING file for details. */ #ifndef LIBISO_ECMA119_H_ #define LIBISO_ECMA119_H_ #include "libisofs.h" #include "util.h" #include "buffer.h" #ifdef HAVE_STDINT_H #include #else #ifdef HAVE_INTTYPES_H #include #endif #endif #include #define BLOCK_SIZE 2048 /* * Maximum file section size. Set to 4GB - 1 = 0xffffffff */ #define MAX_ISO_FILE_SECTION_SIZE 0xffffffff /* * When a file need to be splitted in several sections, the maximum size * of such sections, but the last one. Set to a multiple of BLOCK_SIZE. * Default to 4GB - 2048 = 0xFFFFF800 */ #define ISO_EXTENT_SIZE 0xFFFFF800 /* * The maximum number of partition images that can be registered. Depending * on the system area type, the effectively usable number may be smaller or * even 0. */ #define ISO_MAX_PARTITIONS 8 /* * The cylindersize with SUN Disk Label * (512 bytes/sector, 640 sectors/head, 1 head/cyl = 320 KiB). * Expressed in ECMA-119 blocks of 2048 bytes/block. */ #define ISO_SUN_CYL_SIZE 160 /* * Maximum length of a disc label text plus 1. */ #define ISO_DISC_LABEL_SIZE 129 /* The maximum lenght of an specs violating ECMA-119 file identifier. The theoretical limit is 254 - 34 - 28 (len of SUSP CE entry) = 192 Currently the practical limit is 254 - 34 - 96 (non-CE RR entries) - 28 (CE) */ #ifdef Libisofs_with_rrip_rR #define ISO_UNTRANSLATED_NAMES_MAX 92 #else #define ISO_UNTRANSLATED_NAMES_MAX 96 #endif /** * Holds the options for the image generation. */ struct iso_write_opts { int will_cancel; int level; /**< ISO level to write at. (ECMA-119, 10) */ /** Which extensions to support. */ unsigned int rockridge :1; unsigned int joliet :1; unsigned int iso1999 :1; unsigned int aaip :1; /* whether to write eventual ACL and EAs */ /* allways write timestamps in GMT */ unsigned int always_gmt :1; /* * Relaxed constraints. Setting any of these to 1 break the specifications, * but it is supposed to work on most moderns systems. Use with caution. */ /** * Convert directory names for ECMA-119 the same way as other file names * but do not force dots or add version numbers. * This violates ECMA-119 by allowing one "." and especially ISO level 1 * by allowing DOS style 8.3 names rather than only 8 characters. */ unsigned int allow_dir_id_ext :1; /** * Omit the version number (";1") at the end of the ISO-9660 identifiers. * Version numbers are usually not used. * bit0= ECMA-119 and Joliet (for historical reasons) * bit1= Joliet */ unsigned int omit_version_numbers :2; /** * Allow ISO-9660 directory hierarchy to be deeper than 8 levels. */ unsigned int allow_deep_paths :1; /** * Allow path in the ISO-9660 tree to have more than 255 characters. */ unsigned int allow_longer_paths :1; /** * Allow a single file or directory hierarchy to have up to 37 characters. * This is larger than the 31 characters allowed by ISO level 2, and the * extra space is taken from the version number, so this also forces * omit_version_numbers. */ unsigned int max_37_char_filenames :1; /** * ISO-9660 forces filenames to have a ".", that separates file name from * extension. libisofs adds it if original filename doesn't has one. Set * this to 1 to prevent this behavior * bit0= ECMA-119 * bit1= Joliet */ unsigned int no_force_dots :2; /** * Allow lowercase characters in ISO-9660 filenames. By default, only * uppercase characters, numbers and a few other characters are allowed. */ unsigned int allow_lowercase :1; /** * Allow all ASCII characters to be appear on an ISO-9660 filename. Note * that "/" and "\0" characters are never allowed, even in RR names. */ unsigned int allow_full_ascii :1; /** * Allow all characters to be part of Volume and Volset identifiers on * the Primary Volume Descriptor. This breaks ISO-9660 contraints, but * should work on modern systems. */ unsigned int relaxed_vol_atts :1; /** * Allow paths in the Joliet tree to have more than 240 characters. */ unsigned int joliet_longer_paths :1; /** * Write Rock Ridge info as of specification RRIP-1.10 rather than * RRIP-1.12: signature "RRIP_1991A" rather than "IEEE_1282", * field PX without file serial number */ unsigned int rrip_version_1_10 :1; /** * Write field PX with file serial number even with RRIP-1.10 */ unsigned int rrip_1_10_px_ino :1; /** * See iso_write_opts_set_hardlinks() */ unsigned int hardlinks:1; /** * Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12. * I.e. without announcing it by an ER field and thus without the need * to preceed the RRIP fields by an ES and to preceed the AA field by ES. * This saves bytes and might avoid problems with readers which dislike * ER fields other than the ones for RRIP. * On the other hand, SUSP 1.12 frowns on such unannounced extensions * and prescribes ER and ES. It does this since year 1994. * * In effect only if above flag .aaip is set to 1. */ unsigned int aaip_susp_1_10 :1; /** * Store as ECMA-119 Directory Record timestamp the mtime of the source * rather than the image creation time. (The ECMA-119 prescription seems * to expect that we do have a creation timestamp with the source. * mkisofs writes mtimes and the result seems more suitable if mounted * without Rock Ridge support.) */ unsigned int dir_rec_mtime :1; /** * Compute MD5 checksum for the whole session and record it as index 0 of * the checksum blocks after the data area of the session. The layout and * position of these blocks will be recorded in xattr "isofs.ca" of the * root node. See see also API call iso_image_get_session_md5(). */ unsigned int md5_session_checksum :1; /** * Compute MD5 checksums for IsoFile objects and write them to blocks * after the data area of the session. The layout and position of these * blocks will be recorded in xattr "isofs.ca" of the root node. * The indice of the MD5 sums will be recorded with the IsoFile directory * entries as xattr "isofs.cx". See also API call iso_file_get_md5(). * bit0= compute individual checksums * bit1= pre-compute checksum and compare it with actual one. * Raise MISHAP if mismatch. */ unsigned int md5_file_checksums :2; /** If files should be sorted based on their weight. */ unsigned int sort_files :1; /** * The following options set the default values for files and directory * permissions, gid and uid. All these take one of three values: 0, 1 or 2. * If 0, the corresponding attribute will be kept as setted in the IsoNode. * Unless you have changed it, it corresponds to the value on disc, so it * is suitable for backup purposes. If set to 1, the corresponding attrib. * will be changed by a default suitable value. Finally, if you set it to * 2, the attrib. will be changed with the value specified in the options * below. Note that for mode attributes, only the permissions are set, the * file type remains unchanged. */ unsigned int replace_dir_mode :2; unsigned int replace_file_mode :2; unsigned int replace_uid :2; unsigned int replace_gid :2; mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */ mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */ uid_t uid; /** uid to use when replace_uid == 2. */ gid_t gid; /** gid to use when replace_gid == 2. */ /** * Extra Caution: This option breaks any assumptions about names that * are supported by ECMA-119 specifications. * Omit any translation which would make a file name compliant to the * ECMA-119 rules. This includes and exceeds omit_version_numbers, * max_37_char_filenames, no_force_dots bit0, allow_lowercase. * The maximum name length is given by this variable. * There is a length limit of ISO_UNTRANSLATED_NAMES_MAX characters, * because ECMA-119 allows 254 byte in a directory record, some * of them are occupied by ECMA-119, some more are needed for SUSP CE, * and some are fixely occupied by libisofs Rock Ridge code. * The default value 0 disables this feature. */ unsigned int untranslated_name_len; /** * 0 to use IsoNode timestamps, 1 to use recording time, 2 to use * values from timestamp field. This has only meaning if RR extensions * are enabled. */ unsigned int replace_timestamps :2; time_t timestamp; /** * Charset for the RR filenames that will be created. * NULL to use default charset, the locale one. */ char *output_charset; /** * This flags control the type of the image to create. Libisofs support * two kind of images: stand-alone and appendable. * * A stand-alone image is an image that is valid alone, and that can be * mounted by its own. This is the kind of image you will want to create * in most cases. A stand-alone image can be burned in an empty CD or DVD, * or write to an .iso file for future burning or distribution. * * On the other side, an appendable image is not self contained, it refers * to serveral files that are stored outside the image. Its usage is for * multisession discs, where you add data in a new session, while the * previous session data can still be accessed. In those cases, the old * data is not written again. Instead, the new image refers to it, and thus * it's only valid when appended to the original. Note that in those cases * the image will be written after the original, and thus you will want * to use a ms_block greater than 0. * * Note that if you haven't import a previous image (by means of * iso_image_import()), the image will always be a stand-alone image, as * there is no previous data to refer to. */ unsigned int appendable : 1; /** * Start block of the image. It is supposed to be the lba where the first * block of the image will be written on disc. All references inside the * ISO image will take this into account, thus providing a mountable image. * * For appendable images, that are written to a new session, you should * pass here the lba of the next writable address on disc. * * In stand alone images this is usually 0. However, you may want to * provide a different ms_block if you don't plan to burn the image in the * first session on disc, such as in some CD-Extra disc whether the data * image is written in a new session after some audio tracks. */ uint32_t ms_block; /** * When not NULL, it should point to a buffer of at least 64KiB, where * libisofs will write the contents that should be written at the beginning * of a overwriteable media, to grow the image. The growing of an image is * a way, used by first time in growisofs by Andy Polyakov, to allow the * appending of new data to non-multisession media, such as DVD+RW, in the * same way you append a new session to a multisession disc, i.e., without * need to write again the contents of the previous image. * * Note that if you want this kind of image growing, you will also need to * set appendable to "1" and provide a valid ms_block after the previous * image. * * You should initialize the buffer either with 0s, or with the contents of * the first blocks of the image you're growing. In most cases, 0 is good * enought. */ uint8_t *overwrite; /** * Size, in number of blocks, of the FIFO buffer used between the writer * thread and the burn_source. You have to provide at least a 32 blocks * buffer. */ size_t fifo_size; /** * This is not an option setting but a value returned after the options * were used to compute the layout of the image. * It tells the LBA of the first plain file data block in the image. */ uint32_t data_start_lba; /** * If not empty: A text holding parameters "name" and "timestamp" for * a scdbackup stream checksum tag. See scdbackup/README appendix VERIFY. * It makes sense only for single session images which start at LBA 0. * Such a tag may be part of a libisofs checksum tag block after the * session tag line. It then covers the whole session up to its own start * position. */ char scdbackup_tag_parm[100]; /* If not NULL: A pointer to an application provided array with at least 512 characters. The effectively written scdbackup tag will be copied to this memory location. */ char *scdbackup_tag_written; /* * See ecma119_image : System Area related information */ char *system_area_data; int system_area_options; /* User settable PVD time stamps */ time_t vol_creation_time; time_t vol_modification_time; time_t vol_expiration_time; time_t vol_effective_time; /* To eventually override vol_creation_time and vol_modification_time * by unconverted string with timezone 0 */ char vol_uuid[17]; /* The number of unclaimed 2K blocks before start of partition 1 as of the MBR in system area. Must be 0 or >= 16. (Actually >= number of voldescr + checksum tag) */ uint32_t partition_offset; /* Partition table parameter: 1 to 63, 0= disabled/default */ int partition_secs_per_head; /* 1 to 255, 0= disabled/default */ int partition_heads_per_cyl; #ifdef Libisofs_with_libjtE /* Parameters and state of Jigdo Template Export environment. */ struct libjte_env *libjte_handle; #endif /* Libisofs_with_libjtE */ /* A trailing padding of zero bytes which belongs to the image */ uint32_t tail_blocks; /* Eventual disk file paths of prepared images which shall be appended after the ISO image and described by partiton table entries in a MBR */ char *appended_partitions[ISO_MAX_PARTITIONS]; uint8_t appended_part_types[ISO_MAX_PARTITIONS]; /* Eventual name of the non-ISO aspect of the image. E.g. SUN ASCII label. */ char ascii_disc_label[ISO_DISC_LABEL_SIZE]; }; typedef struct ecma119_image Ecma119Image; typedef struct ecma119_node Ecma119Node; typedef struct joliet_node JolietNode; typedef struct iso1999_node Iso1999Node; typedef struct Iso_File_Src IsoFileSrc; typedef struct Iso_Image_Writer IsoImageWriter; struct ecma119_image { int refcount; IsoImage *image; Ecma119Node *root; int will_cancel :1; unsigned int iso_level :2; /* extensions */ unsigned int rockridge :1; unsigned int joliet :1; unsigned int eltorito :1; unsigned int iso1999 :1; unsigned int hardlinks:1; /* see iso_write_opts_set_hardlinks() */ unsigned int aaip :1; /* see iso_write_opts_set_aaip() */ /* allways write timestamps in GMT */ unsigned int always_gmt :1; /* relaxed constraints */ unsigned int allow_dir_id_ext :1; unsigned int omit_version_numbers :2; unsigned int allow_deep_paths :1; unsigned int allow_longer_paths :1; unsigned int max_37_char_filenames :1; unsigned int no_force_dots :2; unsigned int allow_lowercase :1; unsigned int allow_full_ascii :1; unsigned int relaxed_vol_atts : 1; /** Allow paths on Joliet tree to be larger than 240 bytes */ unsigned int joliet_longer_paths :1; /** Write old fashioned RRIP-1.10 rather than RRIP-1.12 */ unsigned int rrip_version_1_10 :1; /** Write field PX with file serial number even with RRIP-1.10 */ unsigned int rrip_1_10_px_ino :1; /* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12. */ unsigned int aaip_susp_1_10 :1; /* Store in ECMA-119 timestamp mtime of source */ unsigned int dir_rec_mtime :1; unsigned int md5_session_checksum :1; unsigned int md5_file_checksums :2; /* * Mode replace. If one of these flags is set, the correspodent values are * replaced with values below. */ unsigned int replace_uid :1; unsigned int replace_gid :1; unsigned int replace_file_mode :1; unsigned int replace_dir_mode :1; unsigned int replace_timestamps :1; uid_t uid; gid_t gid; mode_t file_mode; mode_t dir_mode; time_t timestamp; unsigned int untranslated_name_len; /** * if sort files or not. Sorting is based of the weight of each file */ int sort_files; char *input_charset; char *output_charset; unsigned int appendable : 1; uint32_t ms_block; /**< start block for a ms image */ time_t now; /**< Time at which writing began. */ /** Total size of the output. This only includes the current volume. */ off_t total_size; uint32_t vol_space_size; /* Bytes already written to image output */ off_t bytes_written; /* just for progress notification */ int percent_written; /* * Block being processed, either during image writing or structure * size calculation. */ uint32_t curblock; /* * The address to be used for the content pointer of empty data files. */ uint32_t empty_file_block; /* * number of dirs in ECMA-119 tree, computed together with dir position, * and needed for path table computation in a efficient way */ size_t ndirs; uint32_t path_table_size; uint32_t l_path_table_pos; uint32_t m_path_table_pos; /* * Joliet related information */ JolietNode *joliet_root; size_t joliet_ndirs; uint32_t joliet_path_table_size; uint32_t joliet_l_path_table_pos; uint32_t joliet_m_path_table_pos; /* * ISO 9660:1999 related information */ Iso1999Node *iso1999_root; size_t iso1999_ndirs; uint32_t iso1999_path_table_size; uint32_t iso1999_l_path_table_pos; uint32_t iso1999_m_path_table_pos; /* * El-Torito related information */ struct el_torito_boot_catalog *catalog; IsoFileSrc *cat; /**< location of the boot catalog in the new image */ int num_bootsrc; IsoFileSrc **bootsrc; /* location of the boot images in the new image */ /* * System Area related information */ /* Content of an embedded boot image. Valid if not NULL. * In that case it must point to a memory buffer at least 32 kB. */ char *system_area_data; /* * bit0= Only with PC-BIOS DOS MBR * Make bytes 446 - 512 of the system area a partition * table which reserves partition 1 from byte 63*512 to the * end of the ISO image. Assumed are 63 secs/hed, 255 head/cyl. * (GRUB protective msdos label.) * This works with and without system_area_data. * bit1= Only with PC-BIOS DOS MBR * Apply isohybrid MBR patching to the system area. * This works only with system_area_data plus ISOLINUX boot image * and only if not bit0 is set. * bit2-7= System area type * 0= DOS MBR * 1= MIPS Big Endian Volume Header */ int system_area_options; /* * Number of pad blocks that we need to write. Padding blocks are blocks * filled by 0s that we put between the directory structures and the file * data. These padding blocks are added by libisofs to improve the handling * of image growing. The idea is that the first blocks in the image are * overwritten with the volume descriptors of the new image. These first * blocks usually correspond to the volume descriptors and directory * structure of the old image, and can be safety overwritten. However, * with very small images they might correspond to valid data. To ensure * this never happens, what we do is to add padding bytes, to ensure no * file data is written in the first 64 KiB, that are the bytes we usually * overwrite. */ uint32_t mspad_blocks; size_t nwriters; IsoImageWriter **writers; /* tree of files sources */ IsoRBTree *files; unsigned int checksum_idx_counter; void *checksum_ctx; off_t checksum_counter; uint32_t checksum_rlsb_tag_pos; uint32_t checksum_sb_tag_pos; uint32_t checksum_tree_tag_pos; uint32_t checksum_tag_pos; char image_md5[16]; char *checksum_buffer; uint32_t checksum_array_pos; uint32_t checksum_range_start; uint32_t checksum_range_size; char *opts_overwrite; /* Points to IsoWriteOpts->overwrite. Use only underneath ecma119_image_new() and if not NULL*/ /* ??? Is there a reason why we copy lots of items from IsoWriteOpts rather than taking ownership of the IsoWriteOpts object which is submitted with ecma119_image_new() ? */ char scdbackup_tag_parm[100]; char *scdbackup_tag_written; /* Buffer for communication between burn_source and writer thread */ IsoRingBuffer *buffer; /* writer thread descriptor */ pthread_t wthread; int wthread_is_running; pthread_attr_t th_attr; /* User settable PVD time stamps */ time_t vol_creation_time; time_t vol_modification_time; time_t vol_expiration_time; time_t vol_effective_time; /* To eventually override vol_creation_time and vol_modification_time * by unconverted string with timezone 0 */ char vol_uuid[17]; /* The number of unclaimed 2K blocks before start of partition 1 as of the MBR in system area. */ uint32_t partition_offset; /* Partition table parameter: 1 to 63, 0= disabled/default */ int partition_secs_per_head; /* 1 to 255, 0= disabled/default */ int partition_heads_per_cyl; /* The currently applicable LBA offset. To be subtracted from any LBA * that is mentioned in volume descriptors, trees, path tables, * Either 0 or .partition_offset */ uint32_t eff_partition_offset; /* The second ECMA-119 directory tree and path tables */ Ecma119Node *partition_root; uint32_t partition_l_table_pos; uint32_t partition_m_table_pos; /* The second Joliet directory tree and path tables */ JolietNode *j_part_root; uint32_t j_part_l_path_table_pos; uint32_t j_part_m_path_table_pos; #ifdef Libisofs_with_libjtE struct libjte_env *libjte_handle; #endif /* Libisofs_with_libjtE */ uint32_t tail_blocks; /* Memorized ELF parameters from MIPS Little Endian boot file */ uint32_t mipsel_e_entry; uint32_t mipsel_p_offset; uint32_t mipsel_p_vaddr; uint32_t mipsel_p_filesz; char *appended_partitions[ISO_MAX_PARTITIONS]; uint8_t appended_part_types[ISO_MAX_PARTITIONS]; /* Counted in blocks of 2048 */ uint32_t appended_part_prepad[ISO_MAX_PARTITIONS]; uint32_t appended_part_start[ISO_MAX_PARTITIONS]; uint32_t appended_part_size[ISO_MAX_PARTITIONS]; char ascii_disc_label[ISO_DISC_LABEL_SIZE]; }; #define BP(a,b) [(b) - (a) + 1] /* ECMA-119, 8.4 */ struct ecma119_pri_vol_desc { uint8_t vol_desc_type BP(1, 1); uint8_t std_identifier BP(2, 6); uint8_t vol_desc_version BP(7, 7); uint8_t unused1 BP(8, 8); uint8_t system_id BP(9, 40); uint8_t volume_id BP(41, 72); uint8_t unused2 BP(73, 80); uint8_t vol_space_size BP(81, 88); uint8_t unused3 BP(89, 120); uint8_t vol_set_size BP(121, 124); uint8_t vol_seq_number BP(125, 128); uint8_t block_size BP(129, 132); uint8_t path_table_size BP(133, 140); uint8_t l_path_table_pos BP(141, 144); uint8_t opt_l_path_table_pos BP(145, 148); uint8_t m_path_table_pos BP(149, 152); uint8_t opt_m_path_table_pos BP(153, 156); uint8_t root_dir_record BP(157, 190); uint8_t vol_set_id BP(191, 318); uint8_t publisher_id BP(319, 446); uint8_t data_prep_id BP(447, 574); uint8_t application_id BP(575, 702); uint8_t copyright_file_id BP(703, 739); uint8_t abstract_file_id BP(740, 776); uint8_t bibliographic_file_id BP(777, 813); uint8_t vol_creation_time BP(814, 830); uint8_t vol_modification_time BP(831, 847); uint8_t vol_expiration_time BP(848, 864); uint8_t vol_effective_time BP(865, 881); uint8_t file_structure_version BP(882, 882); uint8_t reserved1 BP(883, 883); uint8_t app_use BP(884, 1395); uint8_t reserved2 BP(1396, 2048); }; /* ECMA-119, 8.5 */ struct ecma119_sup_vol_desc { uint8_t vol_desc_type BP(1, 1); uint8_t std_identifier BP(2, 6); uint8_t vol_desc_version BP(7, 7); uint8_t vol_flags BP(8, 8); uint8_t system_id BP(9, 40); uint8_t volume_id BP(41, 72); uint8_t unused2 BP(73, 80); uint8_t vol_space_size BP(81, 88); uint8_t esc_sequences BP(89, 120); uint8_t vol_set_size BP(121, 124); uint8_t vol_seq_number BP(125, 128); uint8_t block_size BP(129, 132); uint8_t path_table_size BP(133, 140); uint8_t l_path_table_pos BP(141, 144); uint8_t opt_l_path_table_pos BP(145, 148); uint8_t m_path_table_pos BP(149, 152); uint8_t opt_m_path_table_pos BP(153, 156); uint8_t root_dir_record BP(157, 190); uint8_t vol_set_id BP(191, 318); uint8_t publisher_id BP(319, 446); uint8_t data_prep_id BP(447, 574); uint8_t application_id BP(575, 702); uint8_t copyright_file_id BP(703, 739); uint8_t abstract_file_id BP(740, 776); uint8_t bibliographic_file_id BP(777, 813); uint8_t vol_creation_time BP(814, 830); uint8_t vol_modification_time BP(831, 847); uint8_t vol_expiration_time BP(848, 864); uint8_t vol_effective_time BP(865, 881); uint8_t file_structure_version BP(882, 882); uint8_t reserved1 BP(883, 883); uint8_t app_use BP(884, 1395); uint8_t reserved2 BP(1396, 2048); }; /* ECMA-119, 8.2 */ struct ecma119_boot_rec_vol_desc { uint8_t vol_desc_type BP(1, 1); uint8_t std_identifier BP(2, 6); uint8_t vol_desc_version BP(7, 7); uint8_t boot_sys_id BP(8, 39); uint8_t boot_id BP(40, 71); uint8_t boot_catalog BP(72, 75); uint8_t unused BP(76, 2048); }; /* ECMA-119, 9.1 */ struct ecma119_dir_record { uint8_t len_dr BP(1, 1); uint8_t len_xa BP(2, 2); uint8_t block BP(3, 10); uint8_t length BP(11, 18); uint8_t recording_time BP(19, 25); uint8_t flags BP(26, 26); uint8_t file_unit_size BP(27, 27); uint8_t interleave_gap_size BP(28, 28); uint8_t vol_seq_number BP(29, 32); uint8_t len_fi BP(33, 33); uint8_t file_id BP(34, 34); /* 34 to 33+len_fi */ /* padding field (if len_fi is even) */ /* system use (len_dr - len_su + 1 to len_dr) */ }; /* ECMA-119, 9.4 */ struct ecma119_path_table_record { uint8_t len_di BP(1, 1); uint8_t len_xa BP(2, 2); uint8_t block BP(3, 6); uint8_t parent BP(7, 8); uint8_t dir_id BP(9, 9); /* 9 to 8+len_di */ /* padding field (if len_di is odd) */ }; /* ECMA-119, 8.3 */ struct ecma119_vol_desc_terminator { uint8_t vol_desc_type BP(1, 1); uint8_t std_identifier BP(2, 6); uint8_t vol_desc_version BP(7, 7); uint8_t reserved BP(8, 2048); }; #endif /*LIBISO_ECMA119_H_*/