From: joakim@verona.se
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: code signing with foreign function interface?
Date: Sun, 07 Mar 2010 20:39:46 +0100 [thread overview]
Message-ID: <m3tysr53b1.fsf@verona.se> (raw)
In-Reply-To: <83sk8c2ek4.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 07 Mar 2010 20:04:59 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
>> From: joakim@verona.se
>> Date: Sun, 07 Mar 2010 07:24:47 +0100
>>
>> The GPL cannot prevent free and non-free code being distributed
>> together. Therefore a distributor can push GPL non-compliance to an
>> unknowing user.
>>
>> If code signing of dynamic libraries is employed, the end-user can be
>> made aware he is breaking the intentions of the GPL. Would this be
>> enough to satisfy the requirements for an Emacs FFI?
>
> Forgive me for asking a possibly dumb question (due to my total
> ignorance on this subject): How will you distinguish system libraries
> (which are exempt of being under GPL) from the other kind?
I didnt mean that all dynamic linkage would use this particular
interface.
To exemplify:
- librsvg2.so is dynamically loaded in image.c. This will be
untouched.
- libmediastreamer2.so, a random dll I want to use, is loaded with the new
emacs-ffi facility. But oh no! it doesnt have a proper GPL manifest
signature. I then use a signing tool to add the signature to the .so
file, and emacs-ffi is now happy.
- now I want to add the signature to a non-free dll. I can do it easily
but I will feel bad. If I redistribute the wrongly signed non-free dll
I will be discovered and humiliated.
- Now I want to add the signature to a free dll with some form of hard
to understand license which isnt GPL compatible. If I redistribute the
wrongly signed dll I will be discovered and humiliated, this
time perhaps unjustly.
--
Joakim Verona
next prev parent reply other threads:[~2010-03-07 19:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-07 6:24 code signing with foreign function interface? joakim
2010-03-07 16:13 ` David Kastrup
2010-03-07 17:05 ` joakim
2010-03-07 18:06 ` Stephen J. Turnbull
2010-03-07 19:19 ` joakim
2010-03-08 4:22 ` Stephen J. Turnbull
2010-03-08 8:01 ` David Kastrup
2010-03-08 7:41 ` joakim
2010-03-07 18:04 ` Eli Zaretskii
2010-03-07 19:39 ` joakim [this message]
2010-03-08 8:04 ` Richard Stallman
2010-03-08 8:15 ` joakim
2010-03-08 8:24 ` Miles Bader
2010-03-08 9:02 ` Stephen Berman
2010-03-08 9:12 ` Eli Zaretskii
2010-03-08 15:20 ` Stefan Monnier
2010-03-09 3:18 ` Richard Stallman
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