616 lines
21 KiB
C
616 lines
21 KiB
C
/*
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* Copyright (c) 2007 Vreixo Formoso
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* Copyright (c) 2009 Thomas Schmitt
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*
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* This file is part of the libisofs project; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. See COPYING file for details.
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*/
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#ifndef LIBISO_ECMA119_H_
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#define LIBISO_ECMA119_H_
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#include "libisofs.h"
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#include "util.h"
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#include "buffer.h"
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#include <stdint.h>
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#include <pthread.h>
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#define BLOCK_SIZE 2048
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/*
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* Maximum file section size. Set to 4GB - 1 = 0xffffffff
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*/
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#define MAX_ISO_FILE_SECTION_SIZE 0xffffffff
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/*
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* When a file need to be splitted in several sections, the maximum size
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* of such sections, but the last one. Set to a multiple of BLOCK_SIZE.
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* Default to 4GB - 2048 = 0xFFFFF800
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*/
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#define ISO_EXTENT_SIZE 0xFFFFF800
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/**
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* Holds the options for the image generation.
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*/
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struct iso_write_opts {
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int level; /**< ISO level to write at. (ECMA-119, 10) */
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/** Which extensions to support. */
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unsigned int rockridge :1;
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unsigned int joliet :1;
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unsigned int iso1999 :1;
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unsigned int aaip :1; /* whether to write eventual ACL and EAs */
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/* allways write timestamps in GMT */
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unsigned int always_gmt :1;
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/*
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* Relaxed constraints. Setting any of these to 1 break the specifications,
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* but it is supposed to work on most moderns systems. Use with caution.
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*/
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/**
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* Omit the version number (";1") at the end of the ISO-9660 identifiers.
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* Version numbers are usually not used.
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*/
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unsigned int omit_version_numbers :1;
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/**
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* Allow ISO-9660 directory hierarchy to be deeper than 8 levels.
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*/
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unsigned int allow_deep_paths :1;
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/**
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* Allow path in the ISO-9660 tree to have more than 255 characters.
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*/
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unsigned int allow_longer_paths :1;
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/**
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* Allow a single file or directory hierarchy to have up to 37 characters.
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* This is larger than the 31 characters allowed by ISO level 2, and the
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* extra space is taken from the version number, so this also forces
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* omit_version_numbers.
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*/
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unsigned int max_37_char_filenames :1;
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/**
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* ISO-9660 forces filenames to have a ".", that separates file name from
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* extension. libisofs adds it if original filename doesn't has one. Set
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* this to 1 to prevent this behavior
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*/
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unsigned int no_force_dots :1;
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/**
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* Allow lowercase characters in ISO-9660 filenames. By default, only
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* uppercase characters, numbers and a few other characters are allowed.
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*/
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unsigned int allow_lowercase :1;
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/**
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* Allow all ASCII characters to be appear on an ISO-9660 filename. Note
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* that "/" and "\0" characters are never allowed, even in RR names.
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*/
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unsigned int allow_full_ascii :1;
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/**
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* Allow all characters to be part of Volume and Volset identifiers on
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* the Primary Volume Descriptor. This breaks ISO-9660 contraints, but
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* should work on modern systems.
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*/
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unsigned int relaxed_vol_atts :1;
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/**
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* Allow paths in the Joliet tree to have more than 240 characters.
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*/
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unsigned int joliet_longer_paths :1;
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/**
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* Write Rock Ridge info as of specification RRIP-1.10 rather than
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* RRIP-1.12: signature "RRIP_1991A" rather than "IEEE_1282",
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* field PX without file serial number
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*/
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unsigned int rrip_version_1_10 :1;
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/**
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* Write field PX with file serial number even with RRIP-1.10
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*/
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unsigned int rrip_1_10_px_ino :1;
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/**
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* See iso_write_opts_set_hardlinks()
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*/
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unsigned int hardlinks:1;
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/**
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* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12.
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* I.e. without announcing it by an ER field and thus without the need
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* to preceed the RRIP fields by an ES and to preceed the AA field by ES.
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* This saves bytes and might avoid problems with readers which dislike
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* ER fields other than the ones for RRIP.
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* On the other hand, SUSP 1.12 frowns on such unannounced extensions
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* and prescribes ER and ES. It does this since year 1994.
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*
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* In effect only if above flag .aaip is set to 1.
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*/
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unsigned int aaip_susp_1_10 :1;
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/**
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* Store as ECMA-119 Directory Record timestamp the mtime of the source
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* rather than the image creation time. (The ECMA-119 prescription seems
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* to expect that we do have a creation timestamp with the source.
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* mkisofs writes mtimes and the result seems more suitable if mounted
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* without Rock Ridge support.)
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*/
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unsigned int dir_rec_mtime :1;
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#ifdef Libisofs_with_checksumS
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/**
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* Compute MD5 checksum for the whole session and record it as index 0 of
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* the checksum blocks after the data area of the session. The layout and
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* position of these blocks will be recorded in xattr "isofs.ca" of the
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* root node. See see also API call iso_image_get_session_md5().
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*/
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unsigned int md5_session_checksum :1;
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/**
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* Compute MD5 checksums for IsoFile objects and write them to blocks
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* after the data area of the session. The layout and position of these
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* blocks will be recorded in xattr "isofs.ca" of the root node.
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* The indice of the MD5 sums will be recorded with the IsoFile directory
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* entries as xattr "isofs.cx". See also API call iso_file_get_md5().
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*/
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unsigned int md5_file_checksums :1;
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#endif /* Libisofs_with_checksumS */
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/** If files should be sorted based on their weight. */
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unsigned int sort_files :1;
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/**
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* The following options set the default values for files and directory
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* permissions, gid and uid. All these take one of three values: 0, 1 or 2.
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* If 0, the corresponding attribute will be kept as setted in the IsoNode.
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* Unless you have changed it, it corresponds to the value on disc, so it
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* is suitable for backup purposes. If set to 1, the corresponding attrib.
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* will be changed by a default suitable value. Finally, if you set it to
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* 2, the attrib. will be changed with the value specified in the options
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* below. Note that for mode attributes, only the permissions are set, the
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* file type remains unchanged.
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*/
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unsigned int replace_dir_mode :2;
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unsigned int replace_file_mode :2;
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unsigned int replace_uid :2;
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unsigned int replace_gid :2;
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mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */
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mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */
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uid_t uid; /** uid to use when replace_uid == 2. */
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gid_t gid; /** gid to use when replace_gid == 2. */
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/**
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* 0 to use IsoNode timestamps, 1 to use recording time, 2 to use
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* values from timestamp field. This has only meaning if RR extensions
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* are enabled.
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*/
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unsigned int replace_timestamps :2;
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time_t timestamp;
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/**
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* Charset for the RR filenames that will be created.
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* NULL to use default charset, the locale one.
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*/
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char *output_charset;
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/**
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* This flags control the type of the image to create. Libisofs support
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* two kind of images: stand-alone and appendable.
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*
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* A stand-alone image is an image that is valid alone, and that can be
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* mounted by its own. This is the kind of image you will want to create
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* in most cases. A stand-alone image can be burned in an empty CD or DVD,
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* or write to an .iso file for future burning or distribution.
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*
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* On the other side, an appendable image is not self contained, it refers
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* to serveral files that are stored outside the image. Its usage is for
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* multisession discs, where you add data in a new session, while the
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* previous session data can still be accessed. In those cases, the old
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* data is not written again. Instead, the new image refers to it, and thus
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* it's only valid when appended to the original. Note that in those cases
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* the image will be written after the original, and thus you will want
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* to use a ms_block greater than 0.
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*
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* Note that if you haven't import a previous image (by means of
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* iso_image_import()), the image will always be a stand-alone image, as
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* there is no previous data to refer to.
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*/
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unsigned int appendable : 1;
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/**
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* Start block of the image. It is supposed to be the lba where the first
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* block of the image will be written on disc. All references inside the
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* ISO image will take this into account, thus providing a mountable image.
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*
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* For appendable images, that are written to a new session, you should
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* pass here the lba of the next writable address on disc.
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*
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* In stand alone images this is usually 0. However, you may want to
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* provide a different ms_block if you don't plan to burn the image in the
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* first session on disc, such as in some CD-Extra disc whether the data
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* image is written in a new session after some audio tracks.
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*/
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uint32_t ms_block;
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/**
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* When not NULL, it should point to a buffer of at least 64KiB, where
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* libisofs will write the contents that should be written at the beginning
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* of a overwriteable media, to grow the image. The growing of an image is
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* a way, used by first time in growisofs by Andy Polyakov, to allow the
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* appending of new data to non-multisession media, such as DVD+RW, in the
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* same way you append a new session to a multisession disc, i.e., without
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* need to write again the contents of the previous image.
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*
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* Note that if you want this kind of image growing, you will also need to
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* set appendable to "1" and provide a valid ms_block after the previous
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* image.
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*
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* You should initialize the buffer either with 0s, or with the contents of
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* the first blocks of the image you're growing. In most cases, 0 is good
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* enought.
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*/
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uint8_t *overwrite;
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/**
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* Size, in number of blocks, of the FIFO buffer used between the writer
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* thread and the burn_source. You have to provide at least a 32 blocks
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* buffer.
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*/
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size_t fifo_size;
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/**
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* This is not an option setting but a value returned after the options
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* were used to compute the layout of the image.
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* It tells the LBA of the first plain file data block in the image.
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*/
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uint32_t data_start_lba;
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};
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typedef struct ecma119_image Ecma119Image;
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typedef struct ecma119_node Ecma119Node;
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typedef struct joliet_node JolietNode;
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typedef struct iso1999_node Iso1999Node;
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typedef struct Iso_File_Src IsoFileSrc;
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typedef struct Iso_Image_Writer IsoImageWriter;
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struct ecma119_image
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{
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IsoImage *image;
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Ecma119Node *root;
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unsigned int iso_level :2;
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/* extensions */
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unsigned int rockridge :1;
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unsigned int joliet :1;
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unsigned int eltorito :1;
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unsigned int iso1999 :1;
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unsigned int hardlinks:1; /* see iso_write_opts_set_hardlinks() */
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unsigned int aaip :1; /* see iso_write_opts_set_aaip() */
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/* allways write timestamps in GMT */
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unsigned int always_gmt :1;
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/* relaxed constraints */
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unsigned int omit_version_numbers :1;
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unsigned int allow_deep_paths :1;
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unsigned int allow_longer_paths :1;
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unsigned int max_37_char_filenames :1;
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unsigned int no_force_dots :1;
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unsigned int allow_lowercase :1;
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unsigned int allow_full_ascii :1;
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unsigned int relaxed_vol_atts : 1;
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/** Allow paths on Joliet tree to be larger than 240 bytes */
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unsigned int joliet_longer_paths :1;
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/** Write old fashioned RRIP-1.10 rather than RRIP-1.12 */
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unsigned int rrip_version_1_10 :1;
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/** Write field PX with file serial number even with RRIP-1.10 */
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unsigned int rrip_1_10_px_ino :1;
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/* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12. */
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unsigned int aaip_susp_1_10 :1;
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/* Store in ECMA-119 timestamp mtime of source */
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unsigned int dir_rec_mtime :1;
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#ifdef Libisofs_with_checksumS
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unsigned int md5_session_checksum :1;
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unsigned int md5_file_checksums :1;
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#endif /* Libisofs_with_checksumS */
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/*
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* Mode replace. If one of these flags is set, the correspodent values are
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* replaced with values below.
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*/
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unsigned int replace_uid :1;
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unsigned int replace_gid :1;
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unsigned int replace_file_mode :1;
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unsigned int replace_dir_mode :1;
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unsigned int replace_timestamps :1;
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uid_t uid;
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gid_t gid;
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mode_t file_mode;
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mode_t dir_mode;
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time_t timestamp;
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/**
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* if sort files or not. Sorting is based of the weight of each file
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*/
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int sort_files;
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#ifndef Libisofs_hardlink_matcheR
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/* ts A90508 : <<< this is on its way out */
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/**
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* In the CD, each file must have an unique inode number. So each
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* time we add a new file, this is incremented.
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*/
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ino_t ino;
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#endif /* ! Libisofs_hardlink_matcheR */
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char *input_charset;
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char *output_charset;
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unsigned int appendable : 1;
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uint32_t ms_block; /**< start block for a ms image */
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time_t now; /**< Time at which writing began. */
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/** Total size of the output. This only includes the current volume. */
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off_t total_size;
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uint32_t vol_space_size;
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/* Bytes already written, just for progress notification */
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off_t bytes_written;
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int percent_written;
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/*
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* Block being processed, either during image writing or structure
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* size calculation.
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*/
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uint32_t curblock;
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/*
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* number of dirs in ECMA-119 tree, computed together with dir position,
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* and needed for path table computation in a efficient way
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*/
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size_t ndirs;
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uint32_t path_table_size;
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uint32_t l_path_table_pos;
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uint32_t m_path_table_pos;
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/*
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* Joliet related information
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*/
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JolietNode *joliet_root;
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size_t joliet_ndirs;
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uint32_t joliet_path_table_size;
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uint32_t joliet_l_path_table_pos;
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uint32_t joliet_m_path_table_pos;
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/*
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* ISO 9660:1999 related information
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*/
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Iso1999Node *iso1999_root;
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size_t iso1999_ndirs;
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uint32_t iso1999_path_table_size;
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uint32_t iso1999_l_path_table_pos;
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uint32_t iso1999_m_path_table_pos;
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/*
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* El-Torito related information
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*/
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struct el_torito_boot_catalog *catalog;
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IsoFileSrc *cat; /**< location of the boot catalog in the new image */
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IsoFileSrc *bootimg; /**< location of the boot image in the new image */
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/*
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* Number of pad blocks that we need to write. Padding blocks are blocks
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* filled by 0s that we put between the directory structures and the file
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* data. These padding blocks are added by libisofs to improve the handling
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* of image growing. The idea is that the first blocks in the image are
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* overwritten with the volume descriptors of the new image. These first
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* blocks usually correspond to the volume descriptors and directory
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* structure of the old image, and can be safety overwritten. However,
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* with very small images they might correspond to valid data. To ensure
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* this never happens, what we do is to add padding bytes, to ensure no
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* file data is written in the first 64 KiB, that are the bytes we usually
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* overwrite.
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*/
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uint32_t pad_blocks;
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size_t nwriters;
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IsoImageWriter **writers;
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/* tree of files sources */
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IsoRBTree *files;
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#ifdef Libisofs_with_checksumS
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unsigned int checksum_idx_counter;
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void *checksum_ctx;
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off_t checksum_counter;
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uint32_t checksum_rlsb_tag_pos;
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uint32_t checksum_sb_tag_pos;
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uint32_t checksum_tree_tag_pos;
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uint32_t checksum_tag_pos;
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char image_md5[16];
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char *checksum_buffer;
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uint32_t checksum_array_pos;
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uint32_t checksum_range_start;
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uint32_t checksum_range_size;
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char *opts_overwrite; /* Points to IsoWriteOpts->overwrite.
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Use only underneath ecma119_image_new()
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and if not NULL*/
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/* ??? Is there a reason why we copy lots of items from IsoWriteOpts
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rather than taking ownership of the IsoWriteOpts object which
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is submitted with ecma119_image_new() ?
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*/
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#endif /* Libisofs_with_checksumS */
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/* Buffer for communication between burn_source and writer thread */
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IsoRingBuffer *buffer;
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/* writer thread descriptor */
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pthread_t wthread;
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pthread_attr_t th_attr;
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};
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#define BP(a,b) [(b) - (a) + 1]
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/* ECMA-119, 8.4 */
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struct ecma119_pri_vol_desc
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{
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uint8_t vol_desc_type BP(1, 1);
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uint8_t std_identifier BP(2, 6);
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uint8_t vol_desc_version BP(7, 7);
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uint8_t unused1 BP(8, 8);
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uint8_t system_id BP(9, 40);
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uint8_t volume_id BP(41, 72);
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uint8_t unused2 BP(73, 80);
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uint8_t vol_space_size BP(81, 88);
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uint8_t unused3 BP(89, 120);
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uint8_t vol_set_size BP(121, 124);
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uint8_t vol_seq_number BP(125, 128);
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uint8_t block_size BP(129, 132);
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uint8_t path_table_size BP(133, 140);
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uint8_t l_path_table_pos BP(141, 144);
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uint8_t opt_l_path_table_pos BP(145, 148);
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uint8_t m_path_table_pos BP(149, 152);
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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_*/
|