how to terminate an external program after timeout?

Simon Marlow marlowsd at
Thu Sep 9 07:37:48 EDT 2010

On 09/09/2010 10:39, Christian Maeder wrote:
> Christian Maeder schrieb:
>> Hi,
>> we call from our haskell application the metis prover via
>>   System.Process.readProcessWithExitCode "metis" filename ""
>> However, we are not able to get rid of this process if metis does not
>> terminate by itself. In particular, wrapping this call into a
>> System.Timeout.timeout does not work.
> timeout works so far as it is possible to start another action, but the
> continuing metis process still blocks the whole system.
> C.
>> Any suggestions how we should handle this ideally portably but first of
>> all under unix. (ghc-6.12.3)

Take a look at the timeout program in GHC's test suite:


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