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08.25.2008 at 03:45PM PDT, ID: 23676874
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9.3

Need basic help / description with Perl forks.

Asked by Xerc in Perl Programming Language

Tags:

I am trying to teach myself forking in Perl, and am kinda running up against a wall.  It may be that forking is actually the wrong approach.  What I eventually want is a script that will monitor a directory for incoming files.  It will dump these into an array, and will fork itself to begin uploading a file to a remote directory.  So the idea is I want 5 files being uploaded at once.  But as each child finishes with its file, the parent is somehow aware and spawns another child.  I have several Perl books, but the description of forking is in some fairly complicated daemon examples.  So, what I don't get is how to have a parent spawn five children.  If I use the following, I get a parent, with a child, which then becomes a parent.  

So the questions,

1) Is fork what I need to have 5 files / processes happening at the same time (I'm on Win32 if that matters).  Is fork() the right idea.  
2) If so, can someone explain in the example I gave how to have one parent spawn 5 children.
3) If the parent is a while(1) loop, do I just have it look to see if a child still exists by $pid number.  If it doesn't, then it can go to the next file to process?

Thanks in advance for the help.Start Free Trial
 
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[+][-]08.25.2008 at 04:02PM PDT, ID: 22310143

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[+][-]08.25.2008 at 04:12PM PDT, ID: 22310190

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About this solution

Zone: Perl Programming Language
Tags: Perl
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Solution Provided By: Adam314
Participating Experts: 2
Solution Grade: A
 
 
 
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