lintian: shlib-read-write-env

[Mathieu Malaterre <malat@debian.org>]

Hi there,

I'd like to discuss addition of a new lintian checks for
getenv/setenv/putenv used in shared libraries.

Per glibc manual:

Modifications of environment variables are not allowed in
multi-threaded programs.

-- the glibc manual
[https://www.gnu.org/software/libc/manual/html_node/Environment-Access.html#Environment-Access]

I am targetting in particular the libjpeg / turbojpeg family which I
know are used in multithreaded programs.

A good demo program:
https://rachelbythebay.com/w/2017/01/30/env/


Comments anyone ?

Thanks
-M