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Today's Topics:
1. Re: forkProcess behaviour (David McBride)
----------------------------------------------------------------------
Message: 1
Date: Tue, 17 Jul 2018 09:53:45 -0400
From: David McBride <toa...@gmail.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>
Subject: Re: [Haskell-beginners] forkProcess behaviour
Message-ID:
<can+tr43z53qxqmxsjocgsneckdtexkyehpv2bbcbw5_9e3z...@mail.gmail.com>
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I'm not familiar with forkProcess.
As for exception handling, with asynchronous exceptions, it's a pretty in
depth topic and I can't say I have any mastery of it. fpcomplete did a
talk recently that I suspect could answer most of your questions.
https://www.youtube.com/watch?v=T5y8sFmCFnA
On Tue, Jul 17, 2018 at 4:48 AM, PICCA Frederic-Emmanuel <
frederic-emmanuel.pi...@synchrotron-soleil.fr> wrote:
> Hello,
>
> I try to write a service which execute an IO using forkProcess
> This service contain a web server whcih avwait for job published by users.
> for each job, I create a forkProcess of this job. I need to fork the
> process in order to change the uid and gid of the process for each of the
> job dependencing on who request the job.
>
> I have a least two questions
>
> 1) is this forkProcess a fork of all the current process, or is it just an
> executin of the IO in another process id ?
>
> I ask this because sometime one of my job hang and a process keep running.
> Since the original process is binded to a port, it is not possible to
> restart the server, saying that the port is already in use.
>
> 2 ) How can I catch the exceptions thrown from the child process in order
> to process them in the parent process.
>
> thanks for your help answering these questions.
>
>
> Frederic
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