licensing of intloop() in libddekit/interrupt.c
Unfortunately I didn't get any reply from Zheng Da. Does someone know if Zheng is
using another email address nowadays?
In case he can't be reached anymore, I traced origin of the intloop() routine and
found that:
0. The copyright header in interrupt.c mentions Thomas Friebel <tf13@os.inf.tu-dresden.de>
and Christian Helmuth <ch12@os.inf.tu-dresden.de> as authors, however this doesn't
affect the code I'm importing (see #2).
1. The copyright-significant bits which have actually been used in my work are
exclusively made of code committed to Debian hurd.git:
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=8a1bc5a21ade1a3aeedbb552315ff1ed5da6d7aa
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=40bd937d601627bc9604c5d7d8c528643358b3a7
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=dcd71f277d3fa4615b86e772a4f649d25981dd02
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=63e2a076f77620867d80500b1510f70f5e093a82
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=92e2538dd9825f83d8f961fe85630ebe0bfd4f40
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=2727b6bd16489e8592d3b45faee1f42c00ce2804
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=8a4668dfd4106f26bf5bf6ed69717eb06a3628db
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=1c5442e1fc9d4dfc71c7ce20900436897afcabf8
2. Initial commit by Zheng (6f5290eeb41219ea8b81f6df3ffceb0f4614cdd1) is an import commit
and includes code written by others, however none of the code in that commit is included
in my work (since I'm only interested in the GNU Mach interaction bits which were added
after that).
3. The remaining (Samuel's) commits affecting this routine are trivial renames, not significant
for copyright purposes:
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=56b24422cad2f61ca9d1456e3cf755f53809caa3
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=321bb5dac2409552cf3db5bce8f9462a45cbcf5d
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=2f7814d3d8b629c85e3ea0d9f12f6d2a8daab931
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=6d61151e937510dcb7a4977975bb750eb7ae624c
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pkg-hurd/hurd.git;a=commit;h=22481555a880bb5fe3b87b6f6fd74ed58fa91e7f
With this we have "Copyright (C) 2009, 2010 Zheng Da", but still no licensing information.
Since Zheng committed it to pkg-hurd, I understand it's common convention to assume
Zheng's code is licensed under the same terms?
Unfortunately this gets a bit confusing: some parts of the Hurd are GPLv2 and some are GPLv2+.
Then the file Zheng was modifying [1] is imported from DDE/L4 which is GPLv2 [2].
[1] http://svn.tudos.org/repos/tudos/trunk/l4/pkg/dde/ddekit/src/interrupt.c
[2] http://svn.tudos.org/repos/tudos/trunk/l4/pkg/COPYING
What should we make of this? It's somewhat relevant as the code will be linked into librumpdev_pci,
which in turn will be linked by its final users in the application layer.
Please advise...
El 16/08/15 a les 22:33, Robert Millan ha escrit:
>
> Hi Zheng Da,
>
> First of all, allow me to show you my appreciation for your effort on integrating
> DDE with the Hurd. The groundwork on creating facilities that enable userspace
> drivers has been greatly helpful on this little project of mine.
>
> Just to put you in context, I've ported Rump (http://rumpkernel.org/) to GNU/Hurd
> and written some extensions that allow it to run its own PCI drivers in userspace.
>
> For that I used the same facilities in Gnu Mach that libddekit is using, and also
> imported some the code in libddekit for userspace interrupt management. Olaf (see
> below) believes that this code was written by you:
>
> El 16/08/15 a les 21:02, Olaf Buddenhagen ha escrit:
>> On Sun, Aug 16, 2015 at 01:09:59PM +0200, Robert Millan wrote:
>>
>>> * It includes code from other people under GPLv2;
>>
>>> - intrthread() is heavily based on intloop() from
>>> hurd/libddekit/interrupt.c
>>
>> I haven't checked, but I assume this is form a Hurd-specific part of
>> DDE, which has been implemented by Zheng Da for the Hurd port
>> specifically? If so, we could try contacting him.
>
> Is this correct?
>
> I'm currently trying to merge the resulting code into Rump. This raises the
> question on which license is the code in intloop() under. By lack of any other
> statement one would have to assume it's GPLv2.
--
--
Robert Millan
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