--- loncom/loncron	2005/10/06 20:35:50	1.61
+++ loncom/loncron	2005/11/10 19:07:01	1.62
@@ -2,7 +2,7 @@
 
 # Housekeeping program, started by cron, loncontrol and loncron.pl
 #
-# $Id: loncron,v 1.61 2005/10/06 20:35:50 albertel Exp $
+# $Id: loncron,v 1.62 2005/11/10 19:07:01 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -98,7 +98,7 @@ sub start_daemon {
 	my $lfh=IO::File->new("$pidfile");
 	my $daemonpid=<$lfh>;
 	chomp($daemonpid);
-	if (kill 0 => $daemonpid) {
+	if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
 	    return 1;
 	} else {
 	    return 0;
@@ -134,7 +134,7 @@ sub checkon_daemon {
 	my $lfh=IO::File->new("$pidfile");
 	$daemonpid=<$lfh>;
 	chomp($daemonpid);
-	if (kill 0 => $daemonpid) {
+	if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
 	    &log($fh,"<h3>$daemon at pid $daemonpid responding");
 	    if ($send) { &log($fh,", sending $send"); }
 	    &log($fh,"</h3>");