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.picca@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 _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners