in reply to To organize pipe right way.

Nothing in your code interacts with any user, and why are you using system to write to the FIFO?

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Re^2: To organize pipe right way.
by nikolay (Beadle) on May 05, 2016 at 08:44 UTC
    Interaction w/ a user is out of the problem scope. I used system because: tried and it worked, whereas the PERL's documentation is purely written/understood to/by me.