And of course the way you would do this is by...

  sub catch { 
    my $signal_name = shift ;
    die "Caught CHLD" ;       # or whatever you wish to do!
  }
 $SIG{CHLD} = \&catch;
[download]

See http://perldoc.perl.org/ and search on PERLIPC

Good Luck!,
mslattery