214 lines
9.2 KiB
Plaintext
214 lines
9.2 KiB
Plaintext
------------------------------------------------------------------------------
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libisofs
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------------------------------------------------------------------------------
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Released under GNU General Public License version 2 or later.
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See COPYING file for details.
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Copyright (C) 2008 - 2018 Vreixo Formoso,
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Mario Danic,
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Vladimir Serbinenko,
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Thomas Schmitt
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libisofs is part of the libburnia project (libburnia-project.org)
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------------------------------------------------------------------------------
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Download, Build and Installation
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libisofs code is maintained in a Bazaar repository at Launchpad
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(https://launchpad.net/libisofs/). You can download it with:
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$ bzr branch lp:libisofs/for-libisoburn
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Our build system is based on autotools. For preparing the build you will need
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autotools of at least version 1.7. If you have download the code from the
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repository, first of all you need to execute
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./autogen.sh
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on toplevel dir to execute autotools.
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Alternatively you may unpack a release tarball for which you do not need
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autotools installed. For the most recent release of libisofs see:
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http://libburnia-project.org/wiki/Releases
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To build libisofs it should be sufficient to go into its toplevel directory
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and execute
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./configure --prefix=/usr
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make
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To make the libraries accessible for running and developing applications
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make install
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On GNU/Linux it will try to run program ldconfig with the library installation
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directory as only argument. Failure to do so will not abort installation.
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One may disable ldconfig by ./configure option --disable-ldconfig-at-install .
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By use of a version script, the libisofs.so library exposes no other function
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names but those of the API definitions in <libisofs/libisofs.h>.
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If -Wl,--version-script=... makes problems with the local compiler, then
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disable this encapsulation feature by
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./configure --disable-versioned-libs
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make clean ; make
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The ./configure script checks for the availability of supporting libraries.
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If found, they will become mandatory for the emerging libisofs.so and all
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applications which use it. This dependency can be avoided by configure options
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--disable-libacl avoid use of ACL functions like acl_to_text()
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--disable-xattr avoid use of xattr functions like listxattr()
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--disable-zlib avoid use of zlib functions like compress2()
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--disable-libjte avoid use of libjte functions
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See INSTALL file for general options of ./configure.
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------------------------------------------------------------------------------
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libisofs is a library to create an ISO-9660 filesystem, supports extensions
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like RockRidge or Joliet, and introduces an own extension AAIP.
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It is a full featured ISO-9660 editor which composes and changes the directory
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tree of an ISO image. This tree and its newly imported data file contents get
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then written as independent single-session image or as add-on session for the
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image from where the tree was originally loaded.
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Features:
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---------
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- Image creation
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- Creates ISO-9660 images from local files.
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- Support for RockRidge and Joliet extensions.
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- Support for ISO-9660:1999 (version 2).
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- Support for El-Torito bootable images. Tested are: PC-BIOS and EFI.
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- Support for multi-extent data files up to 400 GB (level 3).
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- Full-featured edition of the image files, including: addition of new
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files, removing of existent files, moving files, renaming files,
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change file attributes (permissions, timestamps...)
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- Optional recording per file of non-ISO 9660 features:
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ACL, xattr, content MD5, hard link relations.
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They do not hamper image readability by operating systems but can be
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retrieved only via libisofs.
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- Optional zisofs compression, gzip compression, external filter
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processes.
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- Several options to relax ISO-9660 constraints.
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- Special options for images intended for distribution (suitable
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default modes for files, hiding of real timestamps...).
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- Image reading
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- Image tree and data heap can be verified by stream reading and
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eventually recorded MD5 tags.
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- Directory tree and file attributes of ISO 9660 session get loaded
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into memory for editing or for extraction into local filesystem.
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- File content can be read by applications.
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- Automatic zisofs decompression.
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- Optional application of gzip decompression or external filter
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processes.
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- Eventually recorded MD5 of data file can be obtained, MD5 of data
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stream can be computed and compared.
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- Helper functions for restoring ACL and/or xattr to the local
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filesystem.
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- Multisession
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- Support for growing an existing image on multi-session media.
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- Support for "emulated multisession" on overwriteable media such as
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DVD+RW, USB sticks, regular files.
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- Support for blindly prepared add-on sessions (mkisofs style -M -C)
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suitable for pipes which lead to an external burn program.
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- Image modification
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- Creates a completely new image from files out of another image and
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eventual editing operations. Suitable for any target medium.
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- Others
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- Handling of different input and output charset.
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- Good integration with libburn for image burning.
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- Reliable, good handling of different kind of errors.
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Requirements:
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-------------
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- iconv() functions for character set conversion must be available.
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Either implicitely as in Linux or by a separate library like libiconv
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on FreeBSD.
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Know bugs:
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----------
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Multisession and image growing can lead to undesired results in several cases:
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a) Images with unsupported features, such as:
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- UDF.
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- HSF/HFS+ or other Mac extensions.
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- ECMA-119 Extended attributes.
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- ...
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In all these cases, the resulting new image (or new session) could lack some
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features of the original image. Nevertheless, the ECMA-119 System Area with
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an eventual Master Boot Record gets preserved by default.
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In some cases libisofs will issue warning messages, or even refuse to grow
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or modify the image. Others remain undetected. Images created with libisofs
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do not have this problems.
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b) Bootable El-Torito images may have problems, that result in a new image that
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is not bootable, or that boots from an outdated session. In some cases it
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might be necessary to add boot info again in a new first session.
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- There is no safe way to modify hidden boot images, as the size of the
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boot image can't be figured out.
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c) Generated images could have different ECMA-119 low level names, due to
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different way to mangle names, to new files added that force old files to
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be renamed, to different relaxed contraints... This only affect the
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ISO-9660 info, not the RR names, so it shouldn't be a problem in most
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cases. If your app. relies on low level ISO-9660 names, you will need to
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ensure all node names are valid ISO names (maybe together with some
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relaxed contraints), otherwise libisofs might arbitrarily change the names.
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------------------------------------------------------------------------------
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 or later
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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------------------------------------------------------------------------------
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Clarification in my name and in the name of Mario Danic, upcoming copyright
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holders on toplevel of libburnia. To be fully in effect after the remaining
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other copyrighted code has been replaced by ours and by copyright-free
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contributions of our friends.
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Note:
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In the particular case of libisofs there is no foreign copyright involved.
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As of 2010 foreign copyright is only in component libburn.
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------------------------------------------------------------------------------
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We will not raise any legal protest to dynamic linking of our libraries
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with applications that are not under GPL, as long as they fulfill
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the condition of offering the library source code used, whether
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altered or unaltered, under the GPLv2+, along with the application.
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Nevertheless, the safest legal position is not to link libburn with
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non-GPL compatible programs.
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We ask you politely to use our work in open source spirit
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and with the due reference to the entire open source community.
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If there should really arise the case where above clarification
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does not suffice to fulfill a clear and neat request in open source
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spirit that would otherwise be declined for mere formal reasons,
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only in that case we will duely consider to issue a special license
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covering only that special case.
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It is the open source idea of responsible freedom which will be
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decisive and you will have to prove that you exhausted all own
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means to qualify for GPL.
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We are firmly committed to allow GPLv2+ now and with future releases.
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Signed: Mario Danic, Thomas Schmitt
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Agreement joined later by: Vreixo Formoso
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Public contact: <bug-xorriso@gnu.org>
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