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Import liblzma from xz 5.8.1
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‎ABOUT-NLS‎

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‎AUTHORS‎

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Authors of XZ Utils
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===================
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XZ Utils is developed and maintained by Lasse Collin
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<lasse.collin@tukaani.org>.
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XZ Utils is developed and maintained by
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Lasse Collin <lasse.collin@tukaani.org>.
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Major parts of liblzma are based on code written by Igor Pavlov,
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specifically the LZMA SDK <http://7-zip.org/sdk.html>. Without
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specifically the LZMA SDK <https://7-zip.org/sdk.html>. Without
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this code, XZ Utils wouldn't exist.
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The SHA-256 implementation in liblzma is based on the code found from
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7-Zip <http://7-zip.org/>, which has a modified version of the SHA-256
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code found from Crypto++ <http://www.cryptopp.com/>. The SHA-256 code
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in Crypto++ was written by Kevin Springle and Wei Dai.
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The SHA-256 implementation in liblzma is based on code written by
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Wei Dai in Crypto++ Library <https://www.cryptopp.com/>.
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Some scripts have been adapted from gzip. The original versions
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were written by Jean-loup Gailly, Charles Levert, and Paul Eggert.
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Andrew Dudman helped adapting the scripts and their man pages for
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XZ Utils.
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A few scripts have been adapted from GNU gzip. The original
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versions were written by Jean-loup Gailly, Charles Levert, and
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Paul Eggert. Andrew Dudman helped adapting the scripts and their
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man pages for XZ Utils.
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The GNU Autotools-based build system contains files from many authors,
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which I'm not trying to list here.
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The initial version of the threaded .xz decompressor was written
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by Sebastian Andrzej Siewior.
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Several people have contributed fixes or reported bugs. Most of them
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are mentioned in the file THANKS.
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The initial version of the .lz (lzip) decoder was written
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by Michał Górny.
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Architecture-specific CRC optimizations were contributed by
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Ilya Kurdyukov, Chenxi Mao, and Xi Ruoyao.
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Other authors:
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- Jonathan Nieder
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- Joachim Henke
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Special author: Jia Tan was a co-maintainer in 2022-2024. He and
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the team behind him inserted a backdoor (CVE-2024-3094) into
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XZ Utils 5.6.0 and 5.6.1 releases. He suddenly disappeared when
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this was discovered.
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Many people have contributed improvements or reported bugs.
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Most of these people are mentioned in the file THANKS.
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The translations of the command line tools and man pages have been
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contributed by many people via the Translation Project:
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- https://translationproject.org/domain/xz.html
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- https://translationproject.org/domain/xz-man.html
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The authors of the translated man pages are in the header comments
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of the man page files. In the source package, the authors of the
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translations are in po/*.po and po4a/*.po files.
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Third-party code whose authors aren't listed here:
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- GNU getopt_long() in the 'lib' directory is included for
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platforms that don't have a usable getopt_long().
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- The build system files from GNU Autoconf, GNU Automake,
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GNU Libtool, GNU Gettext, Autoconf Archive, and related files.
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‎COPYING‎

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==================
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Different licenses apply to different files in this package. Here
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is a rough summary of which licenses apply to which parts of this
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package (but check the individual files to be sure!):
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is a summary of which licenses apply to which parts of this package:
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- liblzma is in the public domain.
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- liblzma is under the BSD Zero Clause License (0BSD).
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- xz, xzdec, and lzmadec command line tools are in the public
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domain unless GNU getopt_long had to be compiled and linked
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in from the lib directory. The getopt_long code is under
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GNU LGPLv2.1+.
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- The command line tools xz, xzdec, lzmadec, and lzmainfo are
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under 0BSD except that, on systems that don't have a usable
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getopt_long, GNU getopt_long is compiled and linked in from the
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'lib' directory. The getopt_long code is under GNU LGPLv2.1+.
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- The scripts to grep, diff, and view compressed files have been
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adapted from gzip. These scripts and their documentation are
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under GNU GPLv2+.
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adapted from GNU gzip. These scripts (xzgrep, xzdiff, xzless,
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and xzmore) are under GNU GPLv2+. The man pages of the scripts
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are under 0BSD; they aren't based on the man pages of GNU gzip.
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- All the documentation in the doc directory and most of the
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XZ Utils specific documentation files in other directories
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are in the public domain.
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- Most of the XZ Utils specific documentation that is in
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plain text files (like README, INSTALL, PACKAGERS, NEWS,
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and ChangeLog) are under 0BSD unless stated otherwise in
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the file itself. The files xz-file-format.txt and
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lzma-file-format.xt are in the public domain but may
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be distributed under the terms of 0BSD too.
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- Translated messages are in the public domain.
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- Translated messages and man pages are under 0BSD except that
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some old translations are in the public domain.
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- The build system contains public domain files, and files that
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are under GNU GPLv2+ or GNU GPLv3+. None of these files end up
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in the binaries being built.
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- Test files and test code in the 'tests' directory, and
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debugging utilities in the 'debug' directory are under
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the BSD Zero Clause License (0BSD).
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- Test files and test code in the tests directory, and debugging
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utilities in the debug directory are in the public domain.
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- The GNU Autotools based build system contains files that are
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under GNU GPLv2+, GNU GPLv3+, and a few permissive licenses.
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These files don't affect the licensing of the binaries being
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built.
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- The extra directory may contain public domain files, and files
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that are under various free software licenses.
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- The 'extra' directory contains files that are under various
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free software licenses. These aren't built or installed as
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part of XZ Utils.
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You can do whatever you want with the files that have been put into
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the public domain. If you find public domain legally problematic,
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take the previous sentence as a license grant. If you still find
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the lack of copyright legally problematic, you have too many
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lawyers.
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The following command may be helpful in finding per-file license
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information. It works on xz.git and on a clean file tree extracted
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from a release tarball.
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As usual, this software is provided "as is", without any warranty.
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sh build-aux/license-check.sh -v
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If you copy significant amounts of public domain code from XZ Utils
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For the files under the BSD Zero Clause License (0BSD), if
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a copyright notice is needed, the following is sufficient:
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Copyright (C) The XZ Utils authors and contributors
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If you copy significant amounts of 0BSD-licensed code from XZ Utils
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into your project, acknowledging this somewhere in your software is
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polite (especially if it is proprietary, non-free software), but
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naturally it is not legally required. Here is an example of a good
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notice to put into "about box" or into documentation:
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it is not legally required by the license terms. Here is an example
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of a good notice to put into "about box" or into documentation:
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This software includes code from XZ Utils <https://tukaani.org/xz/>.
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The following license texts are included in the following files:
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- COPYING.0BSD: BSD Zero Clause License
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- COPYING.LGPLv2.1: GNU Lesser General Public License version 2.1
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- COPYING.GPLv2: GNU General Public License version 2
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- COPYING.GPLv3: GNU General Public License version 3
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Note that the toolchain (compiler, linker etc.) may add some code
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pieces that are copyrighted. Thus, it is possible that e.g. liblzma
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binary wouldn't actually be in the public domain in its entirety
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even though it contains no copyrighted code from the XZ Utils source
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package.
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If you have questions, don't hesitate to ask the author(s) for more
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information.
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If you have questions, don't hesitate to ask for more information.
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The contact information is in the README file.
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‎COPYING.0BSD‎

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Permission to use, copy, modify, and/or distribute this
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software for any purpose with or without fee is hereby granted.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
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THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
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CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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