OK, I have tried using IO::Select. This is what I got so far. After it goes into the while loop $rh_set is empty and the select doesn't wait for output. It's got 100%cpu and loops without going into ForEach loop to DoSomething. What am I doing wrong? 
$w1 = open(fw1,"pgm1|");
$w2 = open(fw2,"pgm2|");

$read_set = new IO::Select(); 
$read_set->add($w1);
$read_set->add($w2);

while (1) { ;
    my ($rh_set) = IO::Select->select($read_set, undef, undef, 2);
    print $rh_set; 
    foreach $rh (@$rh_set) {
              ...DoSomething...
    }
}

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In reply to Re^2: working with 2 inputs by sktron
in thread working with 2 inputs by sktron

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