[issue16500] Add an 'atfork' module

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 13.01.2013 00:37, STINNER Victor wrote:
> By the way, OpenSSL expects that its PRNG is reseed somehow (call RNG_add) after a fork. I wrote a patch for OpenSSL, but I don't remember if I sent it to OpenSSL.
> https://bitbucket.org/haypo/hasard/src/4a1be69a47eb1b2ec7ca95a341d4ca953a77f8c6/patches/openssl_rand_fork.patch?at=default

Apparently not, and according to this thread, they don't think
this is an OpenSSL problem to solve:

http://openssl.6102.n7.nabble.com/recycled-pids-causes-PRNG-to-repeat-td41669.html

Note that you don't have to reseed the RNG just make sure that the
two forks use different sequences. Simply adding some extra data
in each process will suffice, e.g. by adding the PID of the new process
to the RNG pool. This is certainly doable without any major CPU
overhead :-)

----------
nosy: +lemburg

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16500>
_______________________________________