[Haskell-cafe] terminateProcess leaves zombie processes around

[Dan Rosén]

Thank you very much for your answers.

Felipe's suggestion to use waitForProcess after terminateProcess did the
trick. No more zombies around :)

Best regards,
Dan Rosén

On Wed, Dec 7, 2011 at 4:39 PM, Donn Cave <donn at avvanta.com> wrote:

> Quoth Felipe Almeida Lessa <felipe.lessa at gmail.com>,
> > On Wed, Dec 7, 2011 at 1:19 PM, Brandon Allbery <allbery.b at gmail.com>
> wrote:
> >> They *do* terminate; a zombie is a dead process waiting for its parent
> to
> >> reap it with waitForProcess.  There's also some POSIX stuff you can do
> to
> >> have them auto-reaped, but doing that correctly and portably is somewhat
> >> painful.
> >
> > But zombie processes do consume a row in the process table, right?  If
> > so, then it's bad to have them around.
>
> Correct.  As noted above, clean up with waitForProcess to release this
> resource.  If it's more convenient, that could be done up front, by
> forking twice and waiting for the intermediate process.  One possibly
> convenient way to do that might be something like runCommand "eprover &".
>
>        Donn
>
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