Assuming that you are using the "cookbook" method;

use Config;
defined $Config{sig_name} or die "No sigs?";
$i = 0;                     # Config prepends fake 0 signal called "ZE
+RO".
foreach $name (split(' ', $Config{sig_name})) {
    $signo{$name} = $i;
    $signame[$i] = $name;
    $i++;
}
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You should be able to send the kill command to a name -or- PID. This should solve your problem (or am I missing the point of your question?)