Ah. So the read() simply blocks until there actually is something to read and then continues.

Which indicates you can either remove the if-condition completely (since it does nothing) -or- replace it with something that acts on the return value (in case there is an actual i/o error).

In reply to Re^7: Measuring the sound level (dB(A)) with PERL by Monk::Thomas
in thread Measuring the sound level (dB(A)) with PERL by John-Robie

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