waiting for process to finish

ovedpo15 has asked for the wisdom of the Perl Monks concerning the following question:

Hey guys.
Consider a function (lets call it A) which returns 1 if a process finished running, otherwise 0.
I would like to write another function which should wait until the process will finish running.
What's the best why to do it?

I thought of using the while loop and the wait(30); command.
Something like this:

   until(A()) {
      sleep(30);
   }
[download]

I also can just call this subroutine until it will finish, although I don't think its smart because of all unnecessary junk.
What's the best way to do so?
I'm looking for the cleanest way to do it.

Comment on waiting for process to finish Download Code

Replies are listed 'Best First'.
Re: waiting for process to finish by Corion (Patriarch) on Jul 16, 2018 at 07:06 UTC
Have you looked at wait? If you have the PID of the child process, you can wait for it to finish.	[reply]
Re^2: waiting for process to finish by ovedpo15 (Pilgrim) on Jul 16, 2018 at 12:26 UTC
The process is running on a different machine, so I can't use the wait operation.	[reply]
Re^3: waiting for process to finish by Corion (Patriarch) on Jul 16, 2018 at 12:29 UTC
Maybe you can tell us a bit more about the framework you're using to launch processes at the remote end? If you don't want to poll, and can't use wait, maybe you can have the process at the remote end (or a wrapper around it) send you a message when it has finished?	[reply]
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