Change your code, adding this single sequence: 
  $SIG{CHLD} = sub { 
      my $pid = waitpid(-1, 0);
       print ">> eof PID $pid -> $?\n";
   };

[download]
The new result is: 
  PARENT: PID is 3433
  CHILD: PID is 3434, PPID is 3433
>> eof pid 3434 -> 0

[download]
Other samples and techniques at perlipc (find REAPER ;)

--
Marco Antonio
Rio-PM

In reply to Re^3: Protection from zombies by mda2
in thread Protection from zombies by nomis80

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