The only problem is if what you call performs blocking.

Internally the brainfck , operator uses getc which does block.

To be safe, you should use IO::Select to see if there is data to read on the handles.

Are you by any chance an ex-C programmer? :-) In my case it's a test script so I know exactly what input and output to expect. If you are doing what I think you are doing something like Net::Telnet might save you a lot of bother.

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