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    1 ------------------------------------------------------------------------------
    2                                     libisofs
    3 ------------------------------------------------------------------------------
    4 
    5 Released under GNU General Public License version 2 or later.
    6 See COPYING file for details.
    7 
    8 Copyright (C) 2008 - 2018 Vreixo Formoso,
    9                           Mario Danic,
   10                           Vladimir Serbinenko,
   11                           Thomas Schmitt
   12 
   13 libisofs is part of the libburnia project (libburnia-project.org)
   14 ------------------------------------------------------------------------------
   15 
   16                         Download, Build and Installation
   17 
   18 libisofs code is maintained in a Bazaar repository at Launchpad 
   19 (https://launchpad.net/libisofs/). You can download it with:
   20 
   21 $ bzr branch lp:libisofs/for-libisoburn
   22 
   23 Our build system is based on autotools. For preparing the build you will need 
   24 autotools of at least version 1.7. If you have download the code from the
   25 repository, first of all you need to execute
   26 
   27    ./autogen.sh
   28    
   29 on toplevel dir to execute autotools.
   30 
   31 Alternatively you may unpack a release tarball for which you do not need
   32 autotools installed. For the most recent release of libisofs see:
   33    http://libburnia-project.org/wiki/Releases
   34 
   35 To build libisofs it should be sufficient to go into its toplevel directory 
   36 and execute
   37 
   38    ./configure --prefix=/usr
   39    make
   40 
   41 To make the libraries accessible for running and developing applications 
   42    make install
   43 
   44 On GNU/Linux it will try to run program ldconfig with the library installation
   45 directory as only argument. Failure to do so will not abort installation.
   46 One may disable ldconfig by ./configure option --disable-ldconfig-at-install .
   47 
   48 By use of a version script, the libisofs.so library exposes no other function
   49 names but those of the API definitions in <libisofs/libisofs.h>.
   50 If -Wl,--version-script=... makes problems with the local compiler, then
   51 disable this encapsulation feature by
   52     ./configure --disable-versioned-libs
   53     make clean ; make
   54 
   55 The ./configure script checks for the availability of supporting libraries.
   56 If found, they will become mandatory for the emerging libisofs.so and all
   57 applications which use it. This dependency can be avoided by configure options
   58     --disable-libacl   avoid use of ACL functions like acl_to_text()
   59     --disable-xattr    avoid use of xattr functions like listxattr()
   60     --disable-zlib     avoid use of zlib functions like compress2()
   61     --disable-libjte   avoid use of libjte functions
   62 
   63 See INSTALL file for general options of ./configure.
   64 
   65 
   66 ------------------------------------------------------------------------------
   67 
   68 libisofs is a library to create an ISO-9660 filesystem, supports extensions
   69 like RockRidge or Joliet, and introduces an own extension AAIP.
   70 It is a full featured ISO-9660 editor which composes and changes the directory
   71 tree of an ISO image. This tree and its newly imported data file contents get
   72 then written as independent single-session image or as add-on session for the
   73 image from where the tree was originally loaded.
   74 
   75 Features:
   76 ---------
   77 
   78 - Image creation
   79 	- Creates ISO-9660 images from local files.
   80 	- Support for RockRidge and Joliet extensions.
   81 	- Support for ISO-9660:1999 (version 2).
   82 	- Support for El-Torito bootable images. Tested are: PC-BIOS and EFI.
   83 	- Support for multi-extent data files up to 400 GB (level 3).
   84 	- Full-featured edition of the image files, including: addition of new
   85 	  files, removing of existent files, moving files, renaming files,
   86 	  change file attributes (permissions, timestamps...)
   87 	- Optional recording per file of non-ISO 9660 features:
   88 	  ACL, xattr, content MD5, hard link relations.
   89 	  They do not hamper image readability by operating systems but can be
   90 	  retrieved only via libisofs.
   91 	- Optional zisofs compression, gzip compression, external filter
   92 	  processes.
   93 	- Several options to relax ISO-9660 constraints.
   94 	- Special options for images intended for distribution (suitable
   95 	  default modes for files, hiding of real timestamps...).
   96 - Image reading
   97 	- Image tree and data heap can be verified by stream reading and
   98 	  eventually recorded MD5 tags.
   99 	- Directory tree and file attributes of ISO 9660 session get loaded
  100 	  into memory for editing or for extraction into local filesystem.
  101 	- File content can be read by applications.
  102 	- Automatic zisofs decompression.
  103 	- Optional application of gzip decompression or external filter
  104 	  processes.
  105 	- Eventually recorded MD5 of data file can be obtained, MD5 of data
  106 	  stream can be computed and compared.
  107 	- Helper functions for restoring ACL and/or xattr to the local
  108 	  filesystem.
  109 - Multisession
  110 	- Support for growing an existing image on multi-session media.
  111 	- Support for "emulated multisession" on overwriteable media such as
  112 	  DVD+RW, USB sticks, regular files.
  113 	- Support for blindly prepared add-on sessions (mkisofs style -M -C)
  114 	  suitable for pipes which lead to an external burn program.
  115 - Image modification
  116 	- Creates a completely new image from files out of another image and
  117 	  eventual editing operations. Suitable for any target medium.
  118 - Others
  119 	- Handling of different input and output charset.
  120 	- Good integration with libburn for image burning.
  121 	- Reliable, good handling of different kind of errors.
  122 
  123 Requirements:
  124 -------------
  125 
  126 - iconv() functions for character set conversion must be available.
  127   Either implicitely as in Linux or by a separate library like libiconv
  128   on FreeBSD.
  129   
  130 Know bugs:
  131 ----------
  132 
  133 Multisession and image growing can lead to undesired results in several cases:
  134 
  135 a) Images with unsupported features, such as:
  136 	- UDF.
  137 	- HSF/HFS+ or other Mac extensions.
  138 	- ECMA-119 Extended attributes.
  139 	- ...
  140    In all these cases, the resulting new image (or new session) could lack some
  141    features of the original image. Nevertheless, the ECMA-119 System Area with
  142    an eventual Master Boot Record gets preserved by default.
  143    In some cases libisofs will issue warning messages, or even refuse to grow
  144    or modify the image. Others remain undetected. Images created with libisofs
  145    do not have this problems.
  146 
  147 b) Bootable El-Torito images may have problems, that result in a new image that
  148    is not bootable, or that boots from an outdated session. In some cases it
  149    might be necessary to add boot info again in a new first session.
  150     - There is no safe way to modify hidden boot images, as the size of the 
  151       boot image can't be figured out.
  152 
  153 c) Generated images could have different ECMA-119 low level names, due to 
  154    different way to mangle names, to new files added that force old files to 
  155    be renamed, to different relaxed contraints... This only affect the 
  156    ISO-9660 info, not the RR names, so it shouldn't be a problem in most
  157    cases. If your app. relies on low level ISO-9660 names, you will need to 
  158    ensure all node names are valid ISO names (maybe together with some
  159    relaxed contraints), otherwise libisofs might arbitrarily change the names.
  160 
  161 
  162 ------------------------------------------------------------------------------
  163 
  164     This program is free software; you can redistribute it and/or modify
  165     it under the terms of the GNU General Public License version 2 or later
  166     as published by the Free Software Foundation.
  167 
  168     This program is distributed in the hope that it will be useful,
  169     but WITHOUT ANY WARRANTY; without even the implied warranty of
  170     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  171     GNU General Public License for more details.
  172 
  173     You should have received a copy of the GNU General Public License
  174     along with this program; if not, write to the Free Software
  175     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  176 
  177 ------------------------------------------------------------------------------
  178 Clarification in my name and in the name of Mario Danic, upcoming copyright
  179 holders on toplevel of libburnia. To be fully in effect after the remaining
  180 other copyrighted code has been replaced by ours and by copyright-free
  181 contributions of our friends.
  182 
  183 Note:
  184 In the particular case of libisofs there is no foreign copyright involved.
  185 As of 2010 foreign copyright is only in component libburn.
  186 ------------------------------------------------------------------------------
  187 
  188 We will not raise any legal protest to dynamic linking of our libraries
  189 with applications that are not under GPL, as long as they fulfill
  190 the condition of offering the library source code used, whether
  191 altered or unaltered, under the GPLv2+, along with the application.
  192 Nevertheless, the safest legal position is not to link libburn with
  193 non-GPL compatible programs.
  194 
  195 We ask you politely to use our work in open source spirit
  196 and with the due reference to the entire open source community.
  197 
  198 If there should really arise the case where above clarification
  199 does not suffice to fulfill a clear and neat request in open source
  200 spirit that would otherwise be declined for mere formal reasons,
  201 only in that case we will duely consider to issue a special license
  202 covering only that special case.
  203 It is the open source idea of responsible freedom which will be
  204 decisive and you will have to prove that you exhausted all own
  205 means to qualify for GPL.
  206 
  207 We are firmly committed to allow GPLv2+ now and with future releases.
  208 
  209 Signed: Mario Danic, Thomas Schmitt
  210 Agreement joined later by: Vreixo Formoso
  211 
  212 Public contact: <bug-xorriso@gnu.org>
  213