--- loncom/lond	2010/10/25 10:29:33	1.460
+++ loncom/lond	2011/01/20 10:55:02	1.469
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.460 2010/10/25 10:29:33 foxr Exp $
+# $Id: lond,v 1.469 2011/01/20 10:55:02 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -15,6 +15,7 @@
 #
 # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
+
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
@@ -53,12 +54,12 @@ use LONCAPA::lonssl;
 use Fcntl qw(:flock);
 use Apache::lonnet;
 
-my $DEBUG = 1;		       # Non zero to enable debug log entries.
+my $DEBUG = 0;		       # Non zero to enable debug log entries.
 
 my $status='';
 my $lastlog='';
 
-my $VERSION='$Revision: 1.460 $'; #' stupid emacs
+my $VERSION='$Revision: 1.469 $'; #' stupid emacs
 my $remoteVERSION;
 my $currenthostid="default";
 my $currentdomainid;
@@ -1121,6 +1122,8 @@ sub establish_key_handler {
 sub load_handler {
     my ($cmd, $tail, $replyfd) = @_;
 
+
+
    # Get the load average from /proc/loadavg and calculate it as a percentage of
    # the allowed load limit as set by the perl global variable lonLoadLim
 
@@ -2422,7 +2425,6 @@ sub user_has_session_handler {
 
     my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
     
-    &logthis("Looking for $udom $uname");
     opendir(DIR,$perlvar{'lonIDsDir'});
     my $filename;
     while ($filename=readdir(DIR)) {
@@ -4278,7 +4280,7 @@ sub put_domain_handler {
 sub get_domain_handler {
     my ($cmd, $tail, $client) = @_;
 
-    &dirtylog("get_domain_handler");
+
     my $userinput = "$client:$tail";
 
     my ($udom,$namespace,$what)=split(/:/,$tail,3);
@@ -4423,7 +4425,8 @@ sub get_id_handler {
 sub put_dcmail_handler {
     my ($cmd,$tail,$client) = @_;
     my $userinput = "$cmd:$tail";
-                                                                                
+
+
     my ($udom,$what)=split(/:/,$tail);
     chomp($what);
     my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
@@ -5996,7 +5999,7 @@ if (-e $pidfile) {
 $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                                 Type      => SOCK_STREAM,
                                 Proto     => 'tcp',
-                                Reuse     => 1,
+                                ReuseAddr     => 1,
                                 Listen    => 10 )
   or die "making socket: $@\n";
 
@@ -6384,6 +6387,7 @@ sub make_new_child {
             or die "Can't unblock SIGINT for fork: $!\n";
         $children{$pid} = $clientip;
         &status('Started child '.$pid);
+	close($client);
         return;
     } else {
         # Child can *not* return from this subroutine.
@@ -6392,6 +6396,13 @@ sub make_new_child {
                                 #don't get intercepted
         $SIG{USR1}= \&logstatus;
         $SIG{ALRM}= \&timeout;
+	#
+	# Block sigpipe as it gets thrownon socket disconnect and we want to 
+	# deal with that as a read faiure instead.
+	#
+	my $blockset = POSIX::SigSet->new(SIGPIPE);
+	sigprocmask(SIG_BLOCK, $blockset);
+
         $lastlog='Forked ';
         $status='Forked';
 
@@ -7347,6 +7358,8 @@ sub releasereqd_check {
                 my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
                 return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
             }
+        } else {
+            return;
         }
     }
     return 1;
@@ -7354,10 +7367,25 @@ sub releasereqd_check {
 
 sub get_courseinfo_hash {
     my ($cnum,$cdom,$home) = @_;
-    my $hashid = $cdom.':'.$cnum;
-    my %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
-    if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
-        return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
+    my %info;
+    eval {
+        local($SIG{ALRM}) = sub { die "timeout\n"; };
+        local($SIG{__DIE__})='DEFAULT';
+        alarm(3);
+        %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
+        alarm(0);
+    };
+    if ($@) {
+        if ($@ eq "timeout\n") {
+            &logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
+        } else {
+            &logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
+        }
+    } else {
+        if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
+            my $hashid = $cdom.':'.$cnum;
+            return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
+        }
     }
     return;
 }
@@ -7401,7 +7429,10 @@ sub check_homecourses {
             return;
         }
         foreach my $hashid (keys(%recent)) {
-            &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
+            my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
+            unless ($cached) {
+                &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
+            }
         }
         foreach my $hashid (keys(%{$homecourses})) {
             next if ($recent{$hashid});