diff options
| -rw-r--r-- | COPYING.md | 44 | ||||
| -rw-r--r-- | Makefile.am | 3 | ||||
| -rw-r--r-- | README.md | 66 | ||||
| -rw-r--r-- | licenses/GPLv2.txt | 339 | ||||
| -rw-r--r-- | licenses/GPLv3.txt (renamed from LICENSE-gpl.txt) | 0 | ||||
| -rw-r--r-- | licenses/LGPLv3.txt (renamed from LICENSE-lgpl.txt) | 0 | ||||
| -rw-r--r-- | licenses/LZ4.txt | 24 | ||||
| -rw-r--r-- | licenses/xz.txt | 17 | ||||
| -rw-r--r-- | licenses/zlib.txt | 20 | ||||
| -rw-r--r-- | licenses/zstd.txt | 26 |
10 files changed, 516 insertions, 23 deletions
diff --git a/COPYING.md b/COPYING.md new file mode 100644 index 0000000..1185ad5 --- /dev/null +++ b/COPYING.md @@ -0,0 +1,44 @@ +# License of squashfs-tools-ng + +The `libsquashfs` library is released under the terms and conditions of the +**GNU Lesser General Public License version 3 or later**. This applies to +all source code in the directories `lib/sqfs`, `lib/util`, `include/sqfs` +and `include/util`. + +The rest of squashfs-tools-ng is released under the terms and conditions of +the **GNU General Public License version 3 or later**. + +Copies of the licenses are included in `licenses/LGPLv3.txt` and +`licenses/GPLv3.txt` respectively. + +The original source code of squashfs-tools-ng has been written by David +Oberhollenzer in 2019. Additional contributions have been added since the +initial release which makes some parts of the package subject to the copyright +of the respective authors. Appropriate copyright notices and SPDX identifiers +are included in the source code files. + +Although the existing squashfs-tools and the Linux kernel implementation have +been used for testing, the source code in this package is neither based on, +nor derived from either of them. + +# Binary Packages with 3rd Party Libraries + +If this file is included in a binary release package, additional 3rd party +libraries may be included, which are subject to the copyright of their +respective authors and the terms and conditions of their respective liceses. + +The following may be included: + + - The LZO compression library. Copyright Markus F.X.J. Oberhumer. This is + released under the terms and conditions of the GNU General Public License + version 2. A copy of the license is included in `licenses/GPLv2.txt`. + - The LZ4 compression library. Copyright Yann Collet. This is released under a + 2 clause BSD style license, included in `licenses/LZ4.txt`. + - The XZ utils liblzma library is released into the public domain. An excerpt + from the `COPYING` file of its source code archive is included + in `licenses/xz.txt`. + - The zlib compression library. Copyright Jean-loup Gailly and Mark Adler. + This is released under the terms and conditions of the zlib license, + included in `licenses/zlib.txt` + - The zstd compression library. Copyright Facebook, Inc. All rights reserved. + This is released under a BSD style license, included in `licenses/zstd.txt`. diff --git a/Makefile.am b/Makefile.am index 379a949..4a865ed 100644 --- a/Makefile.am +++ b/Makefile.am @@ -16,8 +16,7 @@ dist_man1_MANS = check_PROGRAMS = pkgconfig_DATA = -EXTRA_DIST = autogen.sh LICENSE-gpl.txt LICENSE-lgpl.txt README.md CHANGELOG.md -EXTRA_DIST += mkwinbins.sh +EXTRA_DIST = autogen.sh README.md CHANGELOG.md COPYING.md mkwinbins.sh licenses TESTS = include lib/sqfs/Makemodule.am @@ -45,12 +45,30 @@ together with the existing tools: - `sqfsdiff` can compare the contents of two SquashFS images. -Most of the actual logic of those tools is implemented in the `libsquashfs.so` +Most of the actual logic of those tools is implemented in the `libsquashfs` library that (by default) gets installed on the system along with its header -files, allowing 3rd party applications to use it (e.g. for embedding SqushFS +files, allowing 3rd party applications to use it (e.g. for embedding SquashFS inside a custom container format without having to implement the SquashFS part). +# Pre-built Windows binary Packages + +Pre-compiled binary packages for Windows are available here: + +https://infraroot.at/pub/squashfs/windows + +Those packages contain the binaries for the tools, the SquashFS library +and pre-compiled dependency libraries (zlib, zstd, lzo, lzma, lz4). + +The binary package does not contain any source code. See below on how to obtain +and compile the source for squashfs-tools-ng. The corresponding source code +from which the 3rd party libraries have been built is also available for +download at the above location. + +The headers and import libraries to build applications that use libsquashfs are +included. For convenience, the pre-compiled, 3rd party dependency libraries +also come with headers and import libraries. + # Getting and Building the Source Code Official release tarballs can be obtained here: @@ -76,6 +94,12 @@ If Doxygen is available, a reference manual can be built as follows: make doxygen-doc +The pre-compiled binary packages for Windows are built using a helper script +that uses a MinGW cross toolchain to build squashfs-tools-ng and any of the +required dependencies: + + ./mkwinbins.sh + ## Structure of the Source Code The main functionality of the package is split up into a number libraries. @@ -118,6 +142,24 @@ their choice of license, the code in the `lib/sqfs` and `lib/util` sub-directories is licensed under the LGPLv3, in contrast to the rest of this package. +## A Note on LZO Support + +The SquashFS format supports compression using LZO. The `liblzo2` library +itself is released under the GNU GPL, version 2. + +To make the `libsquashfs` library available as an LGPL library, it *cannot* be +linked against `liblzo2`, neither statically nor dynamically. + +This legal problem has been solved using the following technical measure: + + - `libsquashfs`, as of right now, does not support LZO compression. + - The `libcommon` helper library has an implementation of an `liblzo2` based + compressor. This library and the tools that use it are released under + the GPL. + +This way, the tools themselves *do* support LZO compression seamlessly, while +the `libsquashfs` library does not. + ## Further Information A documentation of the SquashFS on-disk format can be found here: @@ -126,22 +168,4 @@ https://dr-emann.github.io/squashfs/ # Copyright & License -The code of the `libsquashfs` library is released under the terms and -conditions of the GNU Lesser General Public License version 3 or later. The -file `LICENSE-lgpl.txt` contains a copy of the license. Since the license is -based on the General Public License version 3 and makes references to it -instead of duplicating text, a copy of the GPL version 3 is also provided -by the file `LICENSE-gpl.txt`. - -The rest of the software in this package is released under the terms and -conditions of the GNU General Public License version 3 or later. The -file `LICENSE-gpl.txt` contains a copy of the license. - -The original source code in this package has been written by David -Oberhollenzer in 2019. Additional contributions have been added since the -initial release which makes some parts of the package subject to the copyright -of the respective authors. - -Although the existing squashfs-tools and the Linux kernel implementation have -been used for testing, the source code in this package is neither based on, -nor derived from either of them. +See [COPYING.md](COPYING.md) for copyright and licensing information. diff --git a/licenses/GPLv2.txt b/licenses/GPLv2.txt new file mode 100644 index 0000000..d159169 --- /dev/null +++ b/licenses/GPLv2.txt @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. 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See the + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/LICENSE-gpl.txt b/licenses/GPLv3.txt index f288702..f288702 100644 --- a/LICENSE-gpl.txt +++ b/licenses/GPLv3.txt diff --git a/LICENSE-lgpl.txt b/licenses/LGPLv3.txt index 0a04128..0a04128 100644 --- a/LICENSE-lgpl.txt +++ b/licenses/LGPLv3.txt diff --git a/licenses/LZ4.txt b/licenses/LZ4.txt new file mode 100644 index 0000000..74c2cdd --- /dev/null +++ b/licenses/LZ4.txt @@ -0,0 +1,24 @@ +LZ4 Library +Copyright (c) 2011-2016, Yann Collet +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +* Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/licenses/xz.txt b/licenses/xz.txt new file mode 100644 index 0000000..99c125d --- /dev/null +++ b/licenses/xz.txt @@ -0,0 +1,17 @@ +liblzma is in the public domain. + +You can do whatever you want with the files that have been put into +the public domain. If you find public domain legally problematic, +take the previous sentence as a license grant. If you still find +the lack of copyright legally problematic, you have too many +lawyers. + +As usual, this software is provided "as is", without any warranty. + +If you copy significant amounts of public domain code from XZ Utils +into your project, acknowledging this somewhere in your software is +polite (especially if it is proprietary, non-free software), but +naturally it is not legally required. Here is an example of a good +notice to put into "about box" or into documentation: + + This software includes code from XZ Utils <https://tukaani.org/xz/>. diff --git a/licenses/zlib.txt b/licenses/zlib.txt new file mode 100644 index 0000000..51c2378 --- /dev/null +++ b/licenses/zlib.txt @@ -0,0 +1,20 @@ + (C) 1995-2017 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + jloup@gzip.org madler@alumni.caltech.edu diff --git a/licenses/zstd.txt b/licenses/zstd.txt new file mode 100644 index 0000000..3eb46a1 --- /dev/null +++ b/licenses/zstd.txt @@ -0,0 +1,26 @@ +Copyright (c) 2016-present, Facebook, Inc. All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + * Neither the name Facebook nor the names of its contributors may be used to + endorse or promote products derived from this software without specific + prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |