--- loncom/lond	2002/08/08 13:45:21	1.86
+++ loncom/lond	2002/08/09 10:05:00	1.87
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.86 2002/08/08 13:45:21 www Exp $
+# $Id: lond,v 1.87 2002/08/09 10:05:00 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1570,18 +1570,27 @@ sub addline {
 
 sub getchat {
     my ($cdom,$cname)=@_;
-    my @entries;
-    if (open(CHATIN,&propath($cdom,$cname).'/chatroom.txt')) {
-	while ($line=<CHATIN>) { push(@entries,$line); }
-        close(CHATIN);
-        return @entries;
+    my %hash;
+    my $proname=&propath($cdom,$cname);
+    my @entries=();
+    if 
+     (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",&GDBM_READER(),0640))
+    {
+	 @entries=map { $_.':'.$hash{$_} } sort keys %hash;
+         untie %hash;
     }
-    return ();
+    return @entries;
 }
 
 sub chatadd {
-    my ($cdom,$cname,$newchat)=@_;
-    my @entries=&getchat($cdom,$cname);
+  my ($cdom,$cname,$newchat)=@_;
+  my %hash;
+  my $proname=&propath($cdom,$cname);
+  my @entries=();
+  if 
+  (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",&GDBM_WRCREAT(),0640))
+   {
+    @entries=map { $_.':'.$hash{$_} } sort keys %hash;
     my $time=time;
     my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
     my ($thentime,$idnum)=split(/\_/,$lastid);
@@ -1592,16 +1601,16 @@ sub chatadd {
         $idnum=substr('000000'.$idnum,-6,6);
         $newid=$time.'_'.$idnum;
     }
-    push (@entries,$newid.':'.$newchat."\n");
+    $hash{$newid}=$newchat;
     my $expired=$time-3600;
-    open(CHATOUT,'>'.&propath($cdom,$cname).'/chatroom.txt');
-    foreach (@entries) {
+    foreach (keys %hash) {
         my ($thistime)=($_=~/(\d+)\_/);
-        if ($thistime>$expired) {
-	    print CHATOUT $_;
+        if ($thistime<$expired) {
+	   undef $hash{$_};
         }
     }
-    close(CHATOUT);
+    untie %hash;
+   }
 }
 
 sub unsub {