Re: [Haskell-cafe] terminateProcess leaves zombie processes around

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 wrote:

Quoth Felipe Almeida Lessa ,

...

On Wed, Dec 7, 2011 at 1:19 PM, Brandon Allbery 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

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe