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Thomas Schmitt e09acf3b8a Corrected a typo in man cdrskin found by lintian před 1 měsícem
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This all is under GPL.
(See GPL reference, our clarification and commitment at the end of this text)
By Mario Danic <> and Thomas Schmitt <>
Copyright (C) 2006-2019 Mario Danic, Thomas Schmitt
Still containing parts of Libburn. By Derek Foreman <>
and Ben Jansens <>
Copyright (C) 2002-2006 Derek Foreman and Ben Jansens


Build and Installation

From tarball

Obtain libburn-1.5.2.pl01.tar.gz, take it to a directory of your choice and do:

tar xzf libburn-1.5.2.pl01.tar.gz
cd libburn-1.5.2
./configure --prefix=/usr

To make libburn accessible for running and application development,
and to install the cdrecord compatibility binary cdrskin, do
(as Superuser):

make install

This procedure installs and cdrskin depending on it.
For a standalone cdrskin binary, see cdrskin/README.

A behavioral conflict is known between any burn software and demons like hald
which probe CD drives. This can spoil burn runs for CD-R or CD-RW.
You may have to keep your hald away from the drive. See for example

From SVN

Our build system is based on autotools. For preparing the build of a SVN
snapshot you will need autotools of at least version 1.7.
Do in a directory of your choice:

svn co libburn-svn
cd libburn-svn
./configure --prefix=/usr
make install

Warning: The trunk might contain experimental features which might not
persist until next release.

Special ./configure options

make install on GNU/Linux will try to run program ldconfig with the library
installation directory as only argument. Failure to do so will not abort
installation. One may disable ldconfig by ./configure option:

In some situations Linux may deliver a better write performance to drives if
the track input is read with O_DIRECT (see man 2 open). The API call
burn_os_open_track_src() and the input readers of cdrskin and libburn fifo
can be told to use this peculiar read mode by:

But often libburn call burn_write_opts_set_dvd_obs(opts, 64*1024) will yield
even better performance in such a situation. 64k can be made default at
configure time by:
This may be combined with above --enable-track-src-odirect .

If it is desired that DVD DAO writing and stdio: writing get padded up to
a full write chunk of 32k or 64k, then use ./configure option:

Alternatively the transport of SCSI commands can be done via libcdio-0.83.
You may install it and re-run libburn's ./configure with option

By use of a version script, the library exposes no other function
names but those of the API definition in libburn/libburn.h.
If -Wl,--version-script=... makes problems with the local compiler, then
disable this encapsulation feature by

Make sure to re-compile all source files after running ./configure
make clean ; make
make install

Linux only:

libburn tries to avoid a collision with udev's drive examination by waiting
0.1 seconds before opening the device file for a longer time, after udev
might have been alarmed by drive scanning activities.
The waiting time can be set at ./configure time with microsecond granularity.
E.g. 2 seconds:
CFLAGS="$CFLAGS -DLibburn_udev_wait_useC=2000000"
./configure ...options...
Waiting can be disabled by zero waiting time:
CFLAGS="$CFLAGS -DLibburn_udev_wait_useC=0"
Alternatively, libburn can try to be nice by opening the device file,
closing it immediately, waiting, and only then opening it for real:
CFLAGS="$CFLAGS -DLibburn_udev_extra_open_cyclE -DLibburn_udev_wait_useC=500000"


An important part of the project, libisofs, is hosted in a bzr repository at :
bzr branch lp:libisofs

Another part the project, libisoburn, is hosted in the libburnia SVN, too:
svn co libisoburn

See README files there.


Overview of is an open-source software project for reading, mastering
and writing optical discs.
For now this means CD media, all DVD media, all BD media.

The project comprises of several more or less interdependent parts which
together strive to be a usable foundation for application development.
These are libraries, language bindings, and middleware binaries which emulate
classical (and valuable) Linux tools.
Currently it is supported on GNU/Linux with kernels >= 2.4,
on FreeBSD with ATAPI/CAM enabled in the kernel (see man atapicam),
on OpenSolaris (tested with kernel 5.11),
on NetBSD (tested with 6.1.3).
On other X/Open compliant systems there will only be pseudo drives, but no
direct MMC operation on real CD/DVD/BD drives.

For full ports to other systems we would need : login on a development machine
or a live OS on CD or DVD, advise from a system person about the equivalent
of Linux sg or FreeBSD CAM, volunteers for testing of realistic use cases.

We have a well tested code base for burning data and audio CDs, DVDs and BDs.
The burn API is quite comprehensively documented and can be used to build a
presentable application.
We have a functional application which emulates the core use cases of cdrecord
in order to prove that usability, and in order to allow you to explore
libburn's scope by help of existing cdrecord frontends.

ISO 9660 filesystems with Rock Ridge and Joliet extensions can be created
and manipulated quite freely. This capability together with our burn capability
makes possible a single binary application which covers all steps of image
composition, updating and writing. Quite unique in the Linux world.

The project components (list subject to growth, hopefully):

- libburn is the library by which preformatted data get onto optical media.
It uses either /dev/sgN (e.g. on kernel 2.4 with ide-scsi) or
/dev/srM or /dev/hdX (e.g. on kernel 2.6).
libburn is the foundation of our cdrecord emulation. Its code is
independent of cdrecord. Its DVD capabilities are learned from
studying the code of dvd+rw-tools and MMC-5 specs. No code but only
the pure SCSI knowledge has been taken from dvd+rw-tools, though.

- libisofs is the library to pack up hard disk files and directories into a
ISO 9660 disk image. This may then be brought to CD via libburn.
An own ISO 9660 extension stores ACLs, xattr, and MD5 of file

- libisoburn is an add-on to libburn and libisofs which coordinates both and
also can grow ISO-9660 filesystem images on multi-session media
as well as on overwriteable media via the same API.
All media peculiarities are handled automatically.
It also contains the methods of command oriented application
xorriso and offers them via a C language API.

- cdrskin is a limited cdrecord compatibility wrapper for libburn.
cdrecord is a powerful GPL'ed burn program included in Joerg
Schilling's cdrtools. cdrskin strives to be a second source for
the services traditionally provided by cdrecord. Additionally it
provides libburn's DVD capabilities, where only -sao is compatible
with cdrecord.
cdrskin does not contain any bytes copied from cdrecord's sources.
Many bytes have been copied from the message output of cdrecord
runs, though.
See cdrskin/README for more.

- xorriso is an application of all three libraries which creates, loads,
manipulates and writes ISO 9660 filesystem images with
Rock Ridge extensions. Manipulation is not only adding or
overwriting of files but also deleting, renaming, attribute
changing, incremental backups, activating boot images, and
extracting of files from ISO images to disk. There is also a
sparse emulation of cdrecord and a more laborate one of mkisofs.
All features of xorriso are also available via a C language API
of libisoburn.
A static compilation of xorriso and the libraries is dedicated
to the GNU Operating System. See xorriso/README_gnu_xorriso .

- "test" is a collection of application gestures and examples given by the
authors of the library features. The burn API example of libburn
is named test/libburner.c . The API for media information inquiry is
demonstrated in test/telltoc.c .
Explore these examples if you look for inspiration.

We strive to be a responsive upstream.

Our libraries are committed to maintain older feature sets in newer versions.
This applies to source code headers (API) as well as to linkable objects (ABI).
The only exception from this rule is about non-release versions x.y.*[13579]
which are allowed to introduce new features, change those new features in
any way and even may revoke such new features before the next release of
x.y.*[02468]. As soon as it is released, a feature is promised to persist.

SONAMES: (since 0.3.4, March 2007), (since 0.6.2, February 2008), (since 0.1.0, February 2008).

Applications must use 64 bit off_t. E.g. by defining
#define _FILE_OFFSET_BITS 64
or take special precautions to interface with the libraries by 64 bit integers
where the .h files prescribe off_t. To reduce libburn's off_t size to 32 bit
will keep it from processing tracks of more than 2 GB size.

Project history as far as known to me:

- Founded in 2002 as it seems. See mailing list archives
The site of this founder team is reachable and offers download of a
(somewhat outdated) tarball and from CVS :
Copyright holders and most probably founders:
Derek Foreman and Ben Jansens.

- I came to using libburn in 2005. Founded the cdrskin project and submitted
necessary patches which were accepted or implemented better. Except one
remaining patch which prevented cdrskin from using vanilla libburn from CVS.
The cdrskin project site is reachable and offers download of the heavily
patched (elsewise outdated) tarball under the name cdrskin-0.1.2 :
It has meanwhile moved to use vanilla , though.
Version 0.1.4 constitutes the first release of this kind.

- In July 2006 our team mate Mario Danic announced a revival of libburn
which by about nearly everybody else was perceived as unfriendly fork.
Derek Foreman four days later posted a message which expressed his
The situation first caused me to publicly regret it and then - after i
got the opportunity to move in with cdrskin - gave me true reason to
personally apologize to Derek Foreman, Ben Jansens and the contributors at Posted to both projects:

- Mid August 2006 project cdrskin established a branch office in so that all maintainers of our tools have one single place
to get the current (at least slightely) usable coordinated versions of
Project cdrskin will live forth independendly for a while but it is committed
to stay in sync with (or some successor, if ever).
cdrskin is also committed to support if the pending fork
is made reality by content changes in that project. It will cease to maintain
a patched version of though. Precondition for a new
release of cdrskin on base of would be the pending
"whitelist patch" therefore.
I would rather prefer if both projects find consense and merge, or at least
cooperate. I have not given up hope totally, yet.
I, personally, will honor any approach.

- 2nd September 2006 the decision is made to strive for a consolidation of
copyright and a commitment to GPL in a reasonable and open minded way.
This is to avoid long term problems with code of unknown origin and
with finding consense among the not so clearly defined group of copyright
claimers and -holders.
libisofs is already claimed sole copyright Mario Danic.
cdrskin and libburner are already claimed sole copyright Thomas Schmitt.
Rewrites of other components will follow and concluded by claiming full
copyright within the group of holders.

- 16th September 2006 feature freeze for release of libburn-0.2.2 .

- 20th September 2006 release of libburn-0.2.2 .

- 26th October 2006 feature freeze for cdrskin-0.2.4 based on libburn-0.2.3 .
This version of cdrskin is much more cdrecord compatible in repect
to drive addressing and audio features.

- 30th October 2006 release of cdrskin-0.2.4 .

- 13th November 2006 splitting releases of libburn+cdrskin from libisofs.

- 24th November 2006 release of libburn-0.2.6 and cdrskin-0.2.6 . cdrskin has
become suitable for unaware frontends as long as they perform only the core
of cdrecord use cases (including open-ended input streams, audio, and

- 28th November 2006 the umbrella project which encloses both, libisofs and
libburn, is now called libburnia. For the origin of this name, see .

- 16th January 2007 release of libburn-0.3.0 and cdrskin-0.3.0 . Now the scope
is widened to a first class of DVD media: overwriteable single layer types
DVD-RAM, DVD+RW, DVD-RW. This is not a cdrecord emulation but rather inspired
by dvd+rw-tools' "poor man" writing facility for this class of media.
Taking a bow towards Andy Polyakov.

- 11th February 2007 version 0.3.2 covers sequential DVD-RW and DVD-R with
multi-session and with DAO.

- 12th March 2007 version 0.3.4 supports DVD+R and thus covers all single layer
DVD media. Code for double layer DVD+/-R is implemented but awaits a tester

- 23th April 2007 version 0.3.6 follows the unanimous opinion of Linux kernel
people that one should not use /dev/sg on kernel 2.6.

- 31st July 2007 version 0.3.8 marks the first anniversary of libburn revival.
We look back on improved stability, a substantially extended list of media
and write modes, and better protection against typical user mishaps.

- 24th October 2007 version 0.4.0 is the foundation of new library libisoburn
and an upcoming integrated application for manipulating and writing
ISO 9660 + Rock Ridge images. cdrskin-0.4.0 got capabilities like growisofs
by these enhancements: growing of overwriteable media and disk files.
Taking again a bow towards Andy Polyakov.

- 26th Januar 2008 version 0.4.2 rectifies the version numbering so that we
reliably release as should have been done since libburn-0.3.2.
cdrskin now is by default linked dynamically and does a runtime check
to ensure not to be started with a libburn which is older than itself.

- 3rd Feb 2008 libisofs-0.2.x (.so.5) has been deprecated.

- 14th Feb 2008 libisofs-0.6.2 permanently replaces the old libisofs-0.2.x.
It is the first release of new which will guarantee future
API/ABI compatibility for its whole feature set.

- 15th Feb 2008 libisoburn-0.1.0 (.so.1) coordinates libisofs and libburn for
the purpose of ISO image reading and writing. It emulates multi-session on
overwriteable media. Application xorriso makes use of all three libraries.

- 8th Apr 2008 libburn-0.4.4 has proven to be capable of burning to DVD+R/DL
and read performance on disk file pseudo-drives has been improved.

- 27th Apr 2008 libisofs-0.6.4 can now read data file content from images
and can map pieces of disk files onto image files. Image directory iteration
has been enhanced. Input data streams and extended information have been
exposed in the API to enable future development.

- 29th Apr 2008 libisoburn-0.1.4 was made more efficient with reading of
image tree nodes. It now depends on libisofs-0.6.4 and libburn-0.4.4.
xorriso makes use of new libisofs features by performing incremental
updates of directory trees and by cutting oversized data files into
pieces. A primitive single session emulation of cdrecord and mkisofs is

- 10th May 2008 libburn-0.4.6 supports formatting and writing of BD-RE,
full nominal speed for DVD-RAM and BD-RE. cdrskin has a unified blank
type with automatic media state recognition.

- 17th May 2008 an old bug with DVD-RAM and now with BD-RE is fixed by
libburn-0.4.8. So libisoburn can now perform emulation of multisession
on those media.

- 19th May 2008 libisoburn-0.1.6 brings better table-of-content emulation
on overwriteble media and disk files.

- 1st Jun 2008 libisofs-0.6.6 fixes some problems around device files.

- 3rd Jun 2008 libisoburn-0.1.8 fixes a bug with overwriteable media.

- 23rd Jun 2008 libisoburn-0.2.0 introduces extraction of files from
ISO images.

- 16th Jul 2008 libburn-0.5.0 handles systems with no /dev/sr* but only

- 19th Jul 2008 libisoburn/xorriso-0.2.2 can do multi-session in mkisofs
and cdrecord style. xorriso now can serve underneath growisofs.

- 20th Aug 2008 libburn-0.5.2 revokes the necessity that a drive must be
enumerable in order to be addressable. Enumeration is enhanced by examining

- 24th Aug 2008 libisoburn/xorriso-0.2.4 introduces a media readability check
with data retrieval option.

- 18th Sep 2008 libisofs-0.6.8 supports ISO 9660 Level 3 which can represent
very large data files in the image.

- 20th Sep 2008 libisoburn/xorriso-0.2.6 takes into respect the new Level 3
capabilities of libisofs.

- 6th Oct 2008 libburn-0.5.4 adjusts the changes of 0.5.2 to the needs of
Linux kernel 2.4 and introduces human readable SCSI error messages.

- 6th Oct 2008 libisofs-0.6.10 fixes two bugs which prevented adding and
manipulation of ISOLINUX boot images.

- 15th Oct 2008 libisoburn/xorriso-0.2.8 can activate and maintain an
ISOLINUX boot image by an EL Torito boot record.

- 12th Nov 2008 libburn-0.5.6 fixes usage of freed memory by the fifo thread
of an aborted burn run.

- 26th Nov 2008 libisofs-0.6.12 can produce a ISOLINUX isohybrid MBR on the fly
and can produce ISO images which resemble old mkisofs images.

- 2nd Dec 2008 libisoburn-0.3.0. xorriso now is ready for exotic character
sets, for legacy FreeBSD systems which expect an outdated Rock Ridge
signature, and for producing ISO images with MBR which boot from hard disk
or USB stick. Three minor bugs were fixed.

- 7th Dec 2008 libburn-0.5.8 prevents a SIGSEGV with weird CD table-of-content
and improves BD-RE formatting.

- 9th Dec 2008 Our project received a donation from Thomas Weber.

- 2nd Jan 2009 libburn-0.6.0 learned to format BD-R and write to either
formatted or unformatted BD-R.

- 6th Jan 2009 libisoburn-0.3.2. xorriso can produce and execute commands for
mounting older sessions from all kinds of media. Pseudo-drives outside the
/dev/ tree can be addressed without prefix "stdio:".

- 20th Feb 2009 libburn-0.6.2 source release now compiles out of the box
on FreeBSD.

- 28 Feb 2009 libisofs-0.6.14 can record ACLs and Extended Attributes xattr
in its ISO images.

- 01 Mar 2009 libisoburn-0.3.4. xorriso makes use of the ACL and xattr
capabilities provided by libisofs for xorriso backup features.

- 11 Mar 2009 libisofs-0.6.16 of libisofs fixes two bugs which on Solaris
prevented to navigate the ISO images by ".." and to recognize the Rock Ridge
extensions of ISO images. The ban to build libisofs on operating systems
other than Linux and FreeBSD has been lifted.

- 13 Mar 2009 libburn-0.6.4 got a dummy adapter for SCSI/MMC command transport.
It will show no drives and thus libburn will only be able to perform
operations on "stdio:" pseudo drives. Nevertheless this was precondition
to lift the ban to build libburn on operating systems other than Linux
and FreeBSD.

- 16 Mar 2009 libisoburn-0.3.6: xorriso uses RRIP version 1.10 as default
in order to be mountable where mkisofs images are mountable.

- 17 Apr 2009 libisofs-0.6.18 introduces content filtering of data files.
Built-in filters implement compression to formats gzip and zisofs. External
filter processes can perform arbitrary data conversions like encryption.

- 19 Apr 2009 libisoburn-0.3.8 makes use of the new libisofs capability to
perform content filtering of data files.

- 08 May 2009 libburn-0.6.6 fixes a bug with aborting on broken output pipe
and a bug with device scan on FreeBSD.

- 31 May 2009 libisofs-0.6.20 can record hard link relations in ISO images
and offers support with restoring them to disk. Current Linux kernels will
mount images with such hard links but will attribute a unique inode number
to each file.

- 28 Jun 2009 libisoburn-0.4.0: xorriso can record and restore hard link
relations of files. Performance of data reading has been improved. Option
-find now supports logical operators with its tests.

- 14 Jul 2009 libburn-0.6.8 fixes bugs and shortcommings with old MMC-1 drives
and with large SCSI bus numbers as handed out by Linux for USB drives.

- 20 Jul 2009 libisoburn-0.4.0.pl01 fixes a regression in xorriso which caused
data loss in older sessions if xorriso was used underneath growisofs.
Affected are releases since libisoburn-0.3.2 in january 2009.

- 25 Aug 2009 libisofs-0.6.22 can record MD5 checksums for the whole session
and for each single data file. Checksum tags can be used to verify superblock
and directory tree before importing them.

- 27 Aug 2009 libburn-0.7.0 learned to calm down a drive and to inquire its
supported profiles. It works around some pitfalls with U3 enhanced memory
sticks which emulate a CD-ROM.

- 27 Aug 2009 libisoburn-0.4.0.pl00 can record MD5 checksums by which one may
verify the session or single data files in the image. When comparing image
files with files in the local filesystem, the MD5 sums avoid the need for
reading file content from the image.

- 22 Sep 2009 libisoburn-0.4.0.pl01 fixes a bug in xorriso option -cut_out.

- 08 Oct 2009 libisofs-0.6.24 fixes a bug which could cause the loss of blanks
in file names when a new session got added to an ISO image. With names
shorter than 251 characters this happened only to trailing blanks.

- 08 Oct 2009 libisoburn-0.4.0.pl02 fixes bugs with xorriso option -for_backup,
with xorrisofs -help, and with xorrecord -help.

- 12 Oct 2009 libburn-0.7.2 fixes a bug with CD TAO multi-track dummy sessions.
It can retrieve media product info and can process track input which was
prepared for CD-ROM XA Mode 2 Form 1. cdrskin now performs option -minfo.

- 28 Oct 2009 libisoburn-0.4.4 fixes a bug with cdrecord emulation and
introduces new information options about media type and ISO image id strings.
On Linux it helps with mounting two sessions of the same media

- 12 Nov 2009 libburn-0.7.2.pl01 works around problems with Pioneer DVR-216D.
DVD-R runs made the drive stuck. Ejecting the tray did not work properly.

- 06 Dec 2009 libburn-0.7.4 works around problems with newer DVD burners,
provides throughput enhancements with hampered busses on Linux, and new
API calls to log SCSI commands and to control the libburn fifo.

- 09 Dec 2009 libisoburn-0.4.6 now offers performance tuning of output to DVD
drives or disk files.

- 26 Dec 2009 libburn-0.7.4.pl01 fixes the release tarball which was lacking
the files of the generic system adapter for X/Open.

- 29 Dec 2009 Our project received a donation for purchasing a fine small
computer which shall serve as OS farm for development and support.

- 20 Jan 2010 Version 0.6.26 of libisofs fixes minor bugs and shall enhance

- 22 Jan 2010 libburn-0.7.6 has an improved system adapter for FreeBSD,
fixes bugs about the generic X/Open system adapter, and can use
libcdio >= 0.83 as SCSI transport facility.

- 10 Feb 2010 libisofs-0.6.28 fixes a regression about bootable images which
was introduced by version 0.6.22 in August 2009.

- 23 Feb 2010 libisoburn-0.5.0 marks the transition of the xorriso standalone
version to an official GNU project. The name changed to "GNU xorriso" and its
license is now GPLv3+.
The licenses of libburnia libraries and applications are not affected by
this change.

- 10 Mar 2010 libburn-0.7.8 fixes bugs and improves the built-in abort handler
on FreeBSD.

- 30 Mar 2010 Release 0.5.2 of libisoburn provides xorriso documentation in
GNU Texinfo format with embedded extra data to derive a full man page.

- 09 Apr 2010 libburn-0.8.0 now works with ahci driver on FreeBSD 8-STABLE.

- 03 May 2010 Version 0.6.32 of libisofs is able to create ISO images with
multiple boot images. All boot catalog parameters described in El-Torito
specs can be set and inquired. This was needed to use GRUB boot images
for EFI.

- 04 May 2010 Release 0.5.6.pl00 of libisoburn makes use of the new libisofs
capabilities about boot images.

- 11 Jun 2010 libburn-0.8.2 now works on Solaris.

- 14 Jun 2010 By release 0.5.8.pl00 of libisoburn, xorriso becomes a public C
language API of libisoburn. The emulations of mkisofs and cdrecord have
been enhanced.

- Tue Jun 29 2010 Version 0.6.34 of libisofs provides new features about
hiding file names from directory trees.

- Wed Jun 30 2010 libburn-0.8.4 removes some restrictions on operating
systems other than Linux and FreeBSD.

- Fri Jul 02 2010 Release 0.6.0.pl00 of libisoburn adds more options to the
mkisofs emulation of xorriso. It also fixes minor bugs and shortcommings.

- Wed Sep 15 2010 Version 0.6.36 of libisofs can produce ISO images which
bear a partiton 1 with non-zero start address. They can be mounted from
USB stick via the main device file (e.g. /dev/sdb) as well as via the
partition device file (e.g. /dev/sdb1).

- Fri Sep 17 2010 libburn-0.8.6 lifts the test reservation on DVD-R DL media.

- Sat Sep 18 2010 Release 0.6.2.pl00 of libisoburn introduces a partition
with non-zero offset for ISO 9660 images on USB sticks, improves mkisofs
emulation, and fixes a regression which existed since version 0.4.2.

- Wed Oct 20 2010 libburn-0.8.8 can report the used amount of BD spare blocks.

- Sat Oct 23 2010 Version 0.6.38 of libisofs can use libjte to produce jigdo
files along with the ISO image. Further filesystem images may be appended
as MBR partitions 1 to 4. The capability was added to produce boot blocks
for computers with MIPS CPU.

- Tue Oct 26 2010 Release 0.6.4.pl00 of libisoburn and xorriso makes use of
the new libisofs capabilities.

- Wed Dec 08 2010 libburn-0.9.0 fixes a regression with SCSI command logging.

- Fri Dec 10 2010 Version 0.6.40 of libisofs makes the prediction of the
emerging image size less expensive and is able to make images bootable
for SUN SPARC systems.

- Sun Dec 12 2010 Release 0.6.6.pl00 of libisoburn and xorriso can read ISO
images which were copied to a different start address than they were prepared

- Mon Jan 17 2011 we go for release 1.0.0. This does not indicate a
technological overhaul but shall emphasize the maturity of the software.
libisofs-1.0.0 fixes a bug about the length of ECMA-119 directory names and
is ready to store untranslated ECMA-119 names (violating the specs).
libburn-1.0.0.pl00 is now willing to create stdio-drive files with
rw-permissions for all, if umask really asks for it. cdrskin now refuses
to burn if the foreseeable size exceeds media capacity
libisoburn-1.0.0.pl00 can now create an ISO 9660:1999 directory tree,
improved the emulation fidelity of command -as mkisofs, lowered the default
abort threshold for xorriso batch mode, and increased that threshold for
xorriso dialog mode.

- Wed Feb 23 2011 release 1.0.2:
libisofs fixes several bugs and introduces the capability to copy files
inside the ISO filesystem.
libburn removed a compilation obstacle on Solaris 9 and improved recognition
of stdio pseudo-drives.
libisoburn and xorriso fix bugs and make use of the new libisofs capability.
xorriso improves its mkisofs emulation.

- Thu Mar 10 2011 release 1.0.4:
Several bugs were fixed in the libraries and in the mkisofs emulation of
xorriso. This emulation xorrisofs has now an own man page and info document.

- Sat Apr 09 2011 release 1.0.6:
libburn refined its representation of emulated drives. The size alignment
of DVD DAO is now 2 kB rather than 32 kB. libisofs produces Joliet names of
up to 103 characters. xorriso fixes two bugs and makes use of the library

- Thu Apr 14 2011 release libisoburn-1.0.8:
A bug in the mkisofs emulation of xorriso could cause options to be ignored.
The problem was freshly introduced with libisoburn-1.0.6.

- Fri May 13 2011 release libisofs-1.0.8:
Fixes a few rarely occurring bugs that have been found during the last month.

- Sat Jun 18 2011 release 1.1.0:
The consumption of stack memory was reduced. Statical program analysis found
some rarely occurring memory leaks. Several small bugs were fixed.
The suffix .plXY was dropped from tarball names of libburn and libisoburn.

- Mon Jun 20 2011 patch release libburn-1.1.0.pl01:
libburn-1.1.0 compiled only on Linux, FreeBSD, and Solaris, but not on
other X/Open compliant systems.

- Fri Jul 08 2011 release libisofs-1.1.2 and libisoburn-1.1.2:
A severe regression was fixed in libisoburn and xorriso, which was introduced
with version 1.0.6. It caused ISO 9660 images to be unreadable if they were
written to a write-only random-access file. E.g. by: xorrisofs ... >image.iso

- Mon Aug 08 2011 release 1.1.4:
Several bugs were fixed in libburn. The most severe of them prevented xorriso
on some drives from burning mountable ISO 9660 images to CD media.
New means to list drives by their udev symbolic links help to deal with
the non-persistent drive addresses on modern GNU/Linux.

- Tue Sep 27 2011 release 1.1.6:
libisoburn now comes with a test suite. See releng/README. Bugs were fixed
in several rarely used features. Processing of ACL and extattr was enabled
on FreeBSD. Workarounds try to cope with vanishing udev links on GNU/Linux.

- Mon Nov 21 2011 release libburn-1.1.8 and libisoburn-1.1.8:
libburn avoids to close and open drive device files while operating on them.
xorriso emulation mode xorrecord now has an own manual. libburn and xorriso
were prepared to operate on qemu virtio-blk-pci devices.

- Sat Jan 28 2012 release 1.2.0:
libburn has learned to read and write CD-TEXT with CD SAO audio sessions.
It can now read CDRWIN .cue files which define pure audio or pure data
sessions. libisofs and libisoburn improved timestamp handling. Several
minor bugs were fixed.

- Mon Apr 02 2012 release 1.2.2:
The handling of intentional deviations from ECMA-119 specifications has
been improved in libisofs. libisoburn and xorriso now make use of these
improvements. Some rarely occurring bugs have been fixed.

- Fri Jul 20 2012 release 1.2.4:
libburn and libisofs got some rarely occurring bugs fixed. libisofs learned
to produce HFS+ metadata and Apple Partition Map. The capabilities of
isohybrid options --efi and --mac have been implemented (GPT and APM).

- Tue Jan 08 2013 release 1.2.6:
Small improvements were made in libburn. Minor bugs were fixed in the
libraries. xorriso improved its capabilities to serve the needs of frontend
programs. A proof of concept for a GUI frontend has been implemented:

- Mon Mar 18 2013 release 1.2.8:
Some rarely occurring bugs were fixed in libisofs and libburn. libburn's
handling of incomplete sessions has been improved. xorriso's mkisofs
emulation learned to set El Torito section id strings.

- Fri May 17 2013 release 1.3.0:
Several bugs were fixed in the libraries and in xorriso. The recently
introduced new boot preparation capabilities have been tested. New
boot preparation options for GRUB2 were added.

- Fri May 31 2013 patch release libburn-1.3.0.pl01:
cdrskin -msinfo on DVD and BD reported as old session start the same
number as the next writable address.
Regression introduced by version 1.2.8.

- Fri Aug 07 2013 release 1.3.2:
cdrskin has acquired the capability to copy audio tracks to .wav files.
It can extract CD-TEXT in a form that is readable for humans and for
cdrskin itself. Several small bugs were fixed in xorriso. Its capabilities
to serve frontend programs in dialog mode have been improved.

- Thu Dec 12 2013 release 1.3.4:
A long standing hidden bug was fixed, which affected inspection of
unformatted DVD+RW.
xorriso now by default puts EL Torito boot images to low block addresses.
It can report and set read speeds. Several rarely occurring bugs were fixed.

- Tue Mar 04 2014 release 1.3.6:
libburn learned to operate optical drives and media on NetBSD. libisofs got
a bug fix about HFS+ and enhancements about character set conversion.
Minor bugs were fixed in libisoburn. xorriso can now find files with names
which cannot be represented unchanged in ECMA-119, Joliet, or HFS+.

- Sat Jun 28 2014 release 1.3.8:
libburn got several bugs fixed. libisofs offers new API calls for inspection
of boot sectors in ISO 9660 filesystems. xorriso improved its support for
NetBSD, offers new features with command -find, and a command to extract
ISO 9660 file content onto standard output or into filter processes.

- Sun May 17 2015 release 1.4.0:
This release is mainly about bug fixes and a new feature of xorriso to
propose commands or as_mkisofs options which can reproduce the boot
equipment of the loaded ISO filesystem.

- Sat Nov 28 2015 release 1.4.2:
libburn got some bugs fixed and learned to inquire the drive serial number.
libisofs now sorts data file content by ECMA-119 file names for better
reproducability of ISO content. Rock Ridge filenames may be restricted to
lengths between 64 and 255 bytes. If needed, a qualified truncation happens.
xorriso now can replay boot settings when modifying ISO filesystems.
In order to avoid clogging of concurrent Linux SG_IO, xorriso got command
-modesty_on_drive to enable an old workaround from IDE master/slave days.
The source code underwent a scan by Coverity. About 150 code changes
resulted, but no easy-to-trigger bugs were found.

- Fri Jan 29 2016 patch release libburn-1.4.2.pl01:
cdrskin did not work with "-" (stdin) as input.
Regression introduced by version 1.4.2.

- Fri Jul 01 2016 release 1.4.4:
The capability to use Linux /dev/sg was revived in order to circumvent the
sr_mutex lock which hampers concurrent use of optical drives via SG_IO.
libisofs now can use appended partitions by El Torito, avoiding the need
for duplicate EFI System Partition images.
Several bugs have been fixed.

- Fri Sep 16 2016 release 1.4.6:
libburn now operates optical drives on OpenBSD. libisofs makes pseudo-random
id generation reproducible by relating it to the volume date.
xorriso interprets environment variable SOURCE_DATE_EPOCH of to prepare a default setting which leads to identical
ISO images on identical input and identical constant options.
Several moderately embarrassing bugs have been fixed.

- Tue Sep 12 2017 release 1.4.8:
libburn now refuses to write to SRM+POW formatted BD-R, because it would
spoil them. libisofs got several bugs fixed and offers new API calls to
support new xorriso features. libisoburn and xorriso offer more detail
control with particular boot sector types. New bugs and a regression from
version 1.4.4 were fixed.

- Sat Sep 15 2018 release 1.5.0
libisofs now can record all xattr namespaces, user defined padding was moved
after appended partitions. libisoburn and xorriso make use of the new xattr
capability of libisofs.
All three libraries got some rarely triggered bugs fixed.

- Sat Oct 26 2019 release 1.5.2
The libraries are now ready for building out-of-source. libisofs got minor
API extensions. libburn got a bug fixed which spoiled burn runs on
some MATSHITA laptop drives. It is now able to list all features which
the drive announces. xorriso can now set GPT type GUIDs with appended
partitions and the ISO partition.
All three libraries got some rarely triggered bugs fixed.

- Mon Nov 25 2019 patch release 1.5.2.pl01
cdrskin did not properly burn multiple tracks. Track 1 was slow and burning
stalled before track 2. Regression introduced by 1.5.0.


This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 or later
as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Clarification in my name and in the name of Mario Danic, upcoming copyright
holders on toplevel of libburnia. To be fully in effect after the remaining
other copyrighted code has been replaced by ours and by copyright-free
contributions of our friends:

We, the copyright holders, agree on the interpretation that dynamical linking
of our libraries constitutes "use of" and not "derivation from" our work in
the sense of GPL, provided those libraries are compiled from our unaltered
code or from altered code published under GPL.

So we will not raise legal protest if you link our libraries dynamically with
applications which are not under GPL, or if you distribute our libraries
and application tools in binary form, as long as you fulfill the usual
condition of GPL to offer a copy of their source code -altered or unaltered-
under GPL.

We ask you politely to use our work in open source spirit
and with the due reference to the entire open source community.

If there should really arise the case where above clarification
does not suffice to fulfill a clear and neat request in open source
spirit that would otherwise be declined for mere formal reasons,
only in that case we will duely consider to issue a special license
covering only that special case.
It is the open source idea of responsible freedom which will be
decisive and you will have to prove that you exhausted all own
means to qualify for GPL.

For now we are firmly committed to maintain one single license: GPL.

signed: Mario Danic, Thomas Schmitt
Agreement joined later by: Vreixo Formoso