Hi,
I'm currently looking into the spdx migration for borgbackup [1].
The currently distributed code contains a file "crc32_slice_by_8.c" [2] which contains this copyright notice:
// Copyright (c) 2011-2016 Stephan Brumme. All rights reserved. // see http://create.stephan-brumme.com/disclaimer.html
That page contains the following license text:
Unless otherwise noted, all source code published on http://create.stephan-brumme.com and its sub-pages is licensed similar to the zlib license:
This software is provided 'as-is', without any express or implied warranty. In no event will the author 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:
- 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.
- Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
And indeed this is basically the zlib license [3] but it is missing the last paragraph ("3. This notice may not be removed or altered from any source distribution.").
Can I still mark this license as "zlib"?
Please note that the mentioned file was removed from upstream's "master" branch a month ago so this point will be moot once upstream releases its 2.0 version. However that will be a big, incompatible upgrade which might be incompatible with all previously written backup data so Fedora might ship borgbackup 1.x for quite some time.
Felix
[1] https://github.com/borgbackup/borg/
[2] https://github.com/borgbackup/borg/blob/1.2-maint/src/borg/algorithms/crc32_...