while (my ($k, $v) = each %ENV) { $buf .= "\0$k=$v" }
$buf .= "\0\0";
$send_cmd->($sock, [0, 1, 2, fileno($dh)], $buf, MSG_EOR) or die "sendmsg: $!";
-$SIG{TSTP} = sub { $send_cmd->($sock, [], 'STOP', MSG_EOR); kill 'STOP', $$ };
-$SIG{CONT} = sub { $send_cmd->($sock, [], 'CONT', MSG_EOR) };
+$SIG{TSTP} = sub { send($sock, 'STOP', MSG_EOR); kill 'STOP', $$ };
+$SIG{CONT} = sub { send($sock, 'CONT', MSG_EOR) };
my $x_it_code = 0;
while (1) {