On Tue, Jul 24, 2018 at 10:05 AM PICCA Frederic-Emmanuel < frederic-emmanuel.picca@synchrotron-soleil.fr> wrote:
Hello
I have done the first solution and call the program changing the command line in oder to execute each child task. It works well and I can change the uid gid of these process.
For the most part, yes. You may need to reach deeper and use SIGKILL occasionally, depending on how stubborn the child process is. The `timeout` will only kill off the parent thread's call to block on the child's exit code.
Since all these tasks are executing also child process via other system cals. So I have a hyerarchy of process.
Do you know how to manage that sort of things if something goes wrong and I need to kill the first child and all its children's ? Is it possible for CreateProcess to track all these process and kill them all on request ?
Funnily enough, there's another discussion going on about this right now: https://mail.haskell.org/pipermail/haskell-cafe/2018-July/129646.html The basic answer is: * You can create a process group and then kill the whole process group * But a misbehaving program would still be able to escape it by creating its own process group, only something like cgroups can be fully reliable here
Yes, you should avoid forkProcess in this case, it will have unpredictable and confusing results.
I take you advices seriously and now I start to build something (I hope) more robust.
Thansk
Frédéric _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners