Have you had a look at the documentation (or source code of) Parallel::ForkManager? Or maybe Daemon? Where exactly do you have problems?

PPS Pardon. I did not think this is such a complex question. Thanks anyway.

You misunderstand us. We Perlmonks do not shy away from complexity; in fact we live for it. When someone comes asking for help, however, we would be negligent in our monastic duties if we simply provided answers any time a learner of Perl came in the door looking for source code. How would that help anyone? I certainly wouldn't learn anything, and probably neither would you.

So, meet us halfway. Start with some basic research. Even the simplest of Google searches for "perl simple daemon" (the only search I tried) pulls up scores of highly relevant and highly informative results, many of them from right here on PerlMonks. Next, try to write some code. You don't have to fight with it for days on end, but it's in your own best interest to make a decent effort. By the time you do all of that, and write up a good question, if you haven't already figured it out yourself, you will know where you are stuck, and we will know how to help you get unstuck.

I will need to know the hourly rate and duration you think it will take to accomplish the task. We can then negotiate the final price / scope for this request from this non-code-writing service.