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615 lines
21 KiB
615 lines
21 KiB
/* |
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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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|
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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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|
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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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|
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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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|
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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); |
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uint8_t root_dir_record BP(157, 190); |
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uint8_t vol_set_id BP(191, 318); |
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uint8_t publisher_id BP(319, 446); |
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uint8_t data_prep_id BP(447, 574); |
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uint8_t application_id BP(575, 702); |
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uint8_t copyright_file_id BP(703, 739); |
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uint8_t abstract_file_id BP(740, 776); |
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uint8_t bibliographic_file_id BP(777, 813); |
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uint8_t vol_creation_time BP(814, 830); |
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uint8_t vol_modification_time BP(831, 847); |
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uint8_t vol_expiration_time BP(848, 864); |
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uint8_t vol_effective_time BP(865, 881); |
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uint8_t file_structure_version BP(882, 882); |
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uint8_t reserved1 BP(883, 883); |
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uint8_t app_use BP(884, 1395); |
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uint8_t reserved2 BP(1396, 2048); |
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}; |
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|
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/* ECMA-119, 8.5 */ |
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struct ecma119_sup_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 vol_flags 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 esc_sequences 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); |
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uint8_t root_dir_record BP(157, 190); |
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uint8_t vol_set_id BP(191, 318); |
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uint8_t publisher_id BP(319, 446); |
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uint8_t data_prep_id BP(447, 574); |
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uint8_t application_id BP(575, 702); |
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uint8_t copyright_file_id BP(703, 739); |
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uint8_t abstract_file_id BP(740, 776); |
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uint8_t bibliographic_file_id BP(777, 813); |
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uint8_t vol_creation_time BP(814, 830); |
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uint8_t vol_modification_time BP(831, 847); |
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uint8_t vol_expiration_time BP(848, 864); |
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uint8_t vol_effective_time BP(865, 881); |
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uint8_t file_structure_version BP(882, 882); |
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uint8_t reserved1 BP(883, 883); |
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uint8_t app_use BP(884, 1395); |
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uint8_t reserved2 BP(1396, 2048); |
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}; |
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|
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/* ECMA-119, 8.2 */ |
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struct ecma119_boot_rec_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 boot_sys_id BP(8, 39); |
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uint8_t boot_id BP(40, 71); |
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uint8_t boot_catalog BP(72, 75); |
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uint8_t unused BP(76, 2048); |
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}; |
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|
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/* ECMA-119, 9.1 */ |
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struct ecma119_dir_record |
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{ |
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uint8_t len_dr BP(1, 1); |
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uint8_t len_xa BP(2, 2); |
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uint8_t block BP(3, 10); |
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uint8_t length BP(11, 18); |
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uint8_t recording_time BP(19, 25); |
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uint8_t flags BP(26, 26); |
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uint8_t file_unit_size BP(27, 27); |
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uint8_t interleave_gap_size BP(28, 28); |
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uint8_t vol_seq_number BP(29, 32); |
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uint8_t len_fi BP(33, 33); |
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uint8_t file_id BP(34, 34); /* 34 to 33+len_fi */ |
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/* padding field (if len_fi is even) */ |
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/* system use (len_dr - len_su + 1 to len_dr) */ |
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}; |
|
|
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/* ECMA-119, 9.4 */ |
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struct ecma119_path_table_record |
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{ |
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uint8_t len_di BP(1, 1); |
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uint8_t len_xa BP(2, 2); |
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uint8_t block BP(3, 6); |
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uint8_t parent BP(7, 8); |
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uint8_t dir_id BP(9, 9); /* 9 to 8+len_di */ |
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/* padding field (if len_di is odd) */ |
|
}; |
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|
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/* ECMA-119, 8.3 */ |
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struct ecma119_vol_desc_terminator |
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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 reserved BP(8, 2048); |
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}; |
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#endif /*LIBISO_ECMA119_H_*/
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