66 lines
2.7 KiB
Plaintext
66 lines
2.7 KiB
Plaintext
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XZ Utils Licensing
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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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- liblzma is in the public domain.
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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 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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- 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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- Translated messages 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 debugging
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utilities in the debug directory are in the public domain.
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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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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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As usual, this software is provided "as is", without any warranty.
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If you copy significant amounts of public domain 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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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.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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