question on unblocking the signals

Hello,

Please see the code below.
I block the signals in statement 1, and unblocked it in parent
(statement 2) and child (statement 3).
But,  is the statement 2  needed or not?
Should I unblock it once in child or twice in both parent and child?
(if unblocking once is enough, then I believe parent and child will
share the signals).

Thanks!


while (!$DONE)
{
    next unless my $sock = $listen_socket->accept;

    my $signals = POSIX::SigSet->new(SIGHUP,SIGINT,SIGTERM,SIGCHLD);
    sigprocmask(SIG_BLOCK,$signals); # statement 1

    my $child = fork();
    die "[EMERG] can't fork $!\n" unless defined $child;

    if ($child) {
        $status{$child} = 1;
        sigprocmask(SIG_UNBLOCK,$signals); # statement 2

        $sock->close or die "[EMERG] can't close established socket\n";

    } else {
        $SIG{HUP} = $SIG{INT} = $SIG{TERM} = $SIG{CHLD} = 'DEFAULT';
        sigprocmask(SIG_UNBLOCK,$signals); # statement 3

        $listen_socket->close or die "[EMERG] can't close listen
socket\n";

        my $c = <$sock>;
        handle_the_content($c);

        $sock->close or die "[EMERG] can't close established socket\n";

        exit 0;
    }
}

-- 
J. Peng - Peng.Kyo@[EMAIL PROTECTED]
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