[Haskell-cafe] Discussion: The CLOEXEC problem

David Turner dct25-561bs at mythic-beasts.com
Mon Aug 31 08:46:43 UTC 2015

Yes, sure, but what actually does that? i.e. what locks a FD opened by the
Haskell runtime and then expects to preserve the lock across a fork? I see
that this is a problem in theory, but in practice is it?

The point is, how much code would really have to change to fix the fallout
from this?
On 31/08/15 09:28, David Turner wrote:
> Exactly. As I said earlier, if you forget to clear FD_CLOEXEC when you
> meant to then your program breaks loudly and obviously; if you forget to
> *set* FD_CLOEXEC then the bug is much quieter and more subtle.

I think the example given by Donn (a lock silently being cleared too
early) is a case where it does not break loudly and obviously.

I agree with the second part though that bugs related to leaking tend to
be quieter and more subtle in general.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20150831/b3af6a23/attachment.html>

More information about the Haskell-Cafe mailing list