If you need the output from both stdout and stderr via a single stream: 

#main

my $kid = open my $fh, "theExternalProcess 2>&1 |" or die $!;
while( <$fh> ) {
    ## Read the output from theExternalProcess
}
## You'll end up here when the kid goes away

[download]

If you need to keep stdout and stderr separate, then see IPC::Open3 or IPC::Run.

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In reply to Re^3: How to share streams between processes by BrowserUk
in thread How to share streams between processes by rapide

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