my $pid = system 1, "bg_script.pl $ARG1 \"$ARG2\" $ARG3 $ARG4 $ARG5";
print "\$pid == '$pid'\n";

my $still_running = kill 0, $pid;
print "BEFORE SLEEP: \$still_running == '$still_running'\n\n";
sleep 10;
$still_running = kill 0, $pid;
print "AFTER SLEEP: \$still_running == '$still_running'\n\n";