+if ( -e $pid_file ) {
+ open(PIDFILE,"<$pid_file");
+ #chomp( my $old_pid = <PIDFILE> );
+ my $old_pid = <PIDFILE>;
+ close PIDFILE;
+ $old_pid =~ /^(\d+)$/;
+ kill 'TERM', $1;
+}
+open(PIDFILE,">$pid_file");
+print PIDFILE "$$\n";
+close PIDFILE;
+