open(my $FROM_CHLD, '-|', 'programOfInterest')
   or die;

while (<$FROM_CHLD>) {
   print("LINE: $. Val $_");
}

[download]

The child may decide to buffer its output. The child may be convinced not to buffer its output if you use a pseudo tty.

In reply to Re: output external program results at runtime by ikegami
in thread output external program results at runtime by simo_mon

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