if (!$param->{debug}) {
open STDIN, '</dev/null' || die "can't read /dev/null";
open STDOUT, '>/dev/null' || die "can't write /dev/null";
if (!$param->{debug}) {
open STDIN, '</dev/null' || die "can't read /dev/null";
open STDOUT, '>/dev/null' || die "can't write /dev/null";