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It would appear that you already have some external requirements: File::Stat and IO::Handle. I do not deny that doing everything by hand is a fun rich experience to learn from, however, I do believe that if you are already using these modules: what is the harm in adding another one?
If you decide that you still want to do it the fun way, just say so. We are here to help.
I also like to do things the hard way and tend to always implement stuff myself for personal projects.
-Ted
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while(1) fork();
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