Other have already provided you with a solution to your code problems. If you want an alternative to using temporary files for sending the progress of your script to some other program, Net::Clacks might be of help to you Net::Clacks for IPC (2024 tutorial).

Even Santa uses it to monitor his factory: https://perladvent.org/2024/2024-12-13.html

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In reply to Re: Vexing Race Condition by cavac
in thread Vexing Race Condition by Maelstrom

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