Re: LGPL code in /usr/tests?
- Reply: Alan Somers : "Re: LGPL code in /usr/tests?"
- In reply to: Alan Somers : "Re: LGPL code in /usr/tests?"
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Date: Mon, 03 Jan 2022 16:31:33 UTC
On Mon, Jan 3, 2022 at 5:47 PM Alan Somers <email@example.com> wrote: > On Mon, Jan 3, 2022 at 12:37 AM Mehmet Erol Sanliturk > <firstname.lastname@example.org> wrote: > > > > > > > > On Mon, Jan 3, 2022 at 9:31 AM Warner Losh <email@example.com> wrote: > >> > >> Top posting my reactions (sorry) > >> > >> I think 'in base as a private library, used only in the tests protected > by MK_LGPL' is fine. > >> > >> This would keep it in base, keep the testing happening, and allow those > who want > >> to omit it. This would also not run afoul of any companies that still > have downloading > >> GPL'd software is a fireable offense, since all such policies I heard > about years ago > >> were specifically the GPL, not the LGPL). This is of course a trade off > between > >> getting something useful from the LGPL software (better testing) and > our desires > >> not to have any in the tree at all, if possible. Adding a knob would > let it be shut > >> off easily with all the tests disabled that depend on it. This is also > in keeping with > >> our historical practices of having software with undesirable licenses > as long as it > >> gets us something. > >> > >> I think this is better than the ports options because it will get more > use and exposure > >> this way and is more likely to remain working (though with our current > CI setup > >> adding it as a dependency for that CI would be easy and give us decent > coverage). > >> > >> Warner > >> > > > > > > > > https://en.wikipedia.org/wiki/GNU_Lesser_General_Public_License > > GNU Lesser General Public License > > > > https://en.wikipedia.org/wiki/Copyleft#Strong_and_weak_copyleft > > Strong and weak copyleft > > > > > > "GNU Lesser General Public License" is a WEAK copyleft license ( it may > be considered "benign" : it does not invade the user software , affects > only the modifications to the LGPL licensed software ) , > > > > in spite of this , > > > > "GNU General Public License" is a STRONG copyleft license ( it may be > considered "malignant" : it invades the user software as a whole ) . > > > > > > Using a ( LGPL licensed software ) for testing another software is not > directly involved in the tested software . > > > > To eliminate possible doubts , if I were the decision maker about how to > use it , I would make it a port , and fetch it during testing as a > dynamically loaded library ( manage it port with respect to its license ) . > > > > > > Mehmet Erol Sanliturk > > > The problem is that the library, not just the headers, needs to be > present at compile time. Or do you know a good workaround? > You can fetch the LGPL licensed sources during compile time from outside of the FreeBSD base known to the testing program . The user(s) of FreeBSD can also use a similar facility . For example : I am developing mainly two programs : (1) Mathematical Analysis computations (2) A Multi-media information management system These programs are using parts taken from legally personally usable sources which can not be used for a ( free or commercial ) distribution . During program development , it is possible to use them , because they are in there just as a filler for not-implemented-yet parts . To prevent unacceptable inclusion of such sources into my own productions , I am using global directories outside of the program directories : /KBMS/Parts_to_ be_Removed/... ( Part specific directories ) /MAS/Parts_to_ be_Removed/... ( Part specific directories ) It is explicitly known that these directories and their contents can not be used . There is no danger of including them erroneously . You can define such directories . During compilation you may fetch LGPL licensed parts from these directories ( even though they may be on the Internet ) . After compilation of the programs ( and if they are executed ) you may discard them . By supplying a script to manage such issues , users of the FreeBSD may also use the associated external directories created in their systems and used during their works . The main problem for the LGPL licensed sources is the modifications performed in them . If there are such parts they should be open sourced , not the sources of the user sources . The closed source programs will not be affected from such modifications . Some closed source program developers may not want to handle legal implications of these modified or not modified LGPL licensed parts even when they are distributed because any failure of distribution of especially modified sources may cause significant trouble for them . To eliminate such distribution related concerns , the best action may be to store these sources into a publicly accessible repository , modify these sources in that repository and use them from this repository . In this case , modifications in the main repository and excluding of these from FreeBSD distributions will not affect FreeBSD users other than fetching them when they are needed , which is legally acceptable and harmless . Generation of a package or port from this repository may be necessary or not , I will not be able to say anything because I do not know . The port or package generator persons would know such points . My opinion is that the above model may not require either a port or a package separately because everything necessary will be in the repository . Mehmet Erol Sanliturk > > > > > > > > > > >> > >> On Fri, Dec 31, 2021 at 2:22 PM Alan Somers <firstname.lastname@example.org> > wrote: > >>> > >>> I recently ran into a bug in fusefs that can only be triggered when > >>> NFS exports a FUSE file system. That makes it very difficult to write > >>> an automated test. My options are basically: > >>> > >>> * Add an fhgetdirentries(2) syscall that is like getdirentries, but > >>> takes a fhandle_t* argument instead of a file descriptor. > >>> * Actually start nfsd during the test, and export the temporary FUSE > filesystem. > >>> > >>> The first option sounds like way too much non-test code to change. > >>> Plus, I may need to add thread() and fhwrite() syscalls too, for other > >>> NFS-related test cases. The second option would also be a lot of > >>> work, but at least the work would all be confined to the test code. > >>> However, what would I do once I've exported the file system? Mounting > >>> it with the NFS client would add several more layers to the stack > >>> under test. I'm not even sure that it's safe to self-mount an > >>> exported file system. Another option would be to communicate directly > >>> with nfsd from the test code. That's possible, but writing NFS RPCs > >>> by hand is very cumbersome, and it would obscure the test logic. A > >>> better option is to use libnfs. The API is just what I would need. > >>> However, it's licensed under the LGPL 2.1. I know that we as a > >>> project decided to import no new GPLish code into contrib/. But this > >>> code would never be used outside of /usr/tests, so it wouldn't even > >>> affect many production builds. Would that be acceptable? The > >>> workarounds are ugly: > >>> > >>> * Create a new port for all libnfs-dependent tests. This would be > >>> hard to maintain, because the content of the tests must be so > >>> dependent on the base version of the OS. > >>> * Write the tests in Python using libnfs-python. The tests could > >>> still be compiled as part of the base system, they just wouldn't work > >>> unless libnfs-python is installed from ports. But this is awkward > >>> because the tests are currently C++. So I would have to embed a > >>> Python interpreter into the C++ code. It would really obfuscate the > >>> test logic. > >>> * Store the tests in the base system, but detached from the build. > >>> Then create a port that builds them by mounting SRC_BASE, much like > >>> devel/py-libzfs does. It would then install them in /usr/local/tests. > >>> This is probably the least-bad option if I can't import libnfs into > >>> contrib/. > >>> > >>> What do you think? Is it acceptable to import libnfs intro contrib/? > >>> It's LGPL, except for a few headers that are BSD and some examples > >>> that are GPLv3. But we needn't use the examples, or even import them. > >>> > >>> https://github.com/sahlberg/libnfs > >>> >