What happens if you use eof on the current filehandle? You want to exhaust everything you can read without blocking, right? (You can control that the children always send a newline to terminate each line too.)

Something like this might get you further:

        while (!eof( $fd ))
        {
            chomp( my $data = <$fd> );
            if ($data) {
                push @results, [ split ":", $data ];
            }
            else {    # Other side (child) has closed connection.
                $file_iter->remove($_);
                close $fd;    # Closing fd cleans up child
            }
        }
        sleep 10;

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In reply to Re: Select on child output problem by chromatic
in thread Select on child output problem by topher

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