--- loncom/lond	2003/03/02 03:58:55	1.110
+++ loncom/lond	2003/05/06 21:36:42	1.126
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.110 2003/03/02 03:58:55 www Exp $
+# $Id: lond,v 1.126 2003/05/06 21:36:42 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -52,13 +52,12 @@
 #      preforking is not really needed.
 ###
 
-
 use lib '/home/httpd/lib/perl/';
 use LONCAPA::Configuration;
 
 use IO::Socket;
 use IO::File;
-use Apache::File;
+#use Apache::File;
 use Symbol;
 use POSIX;
 use Crypt::IDEA;
@@ -74,6 +73,10 @@ my $DEBUG = 0;		       # Non zero to ena
 my $status='';
 my $lastlog='';
 
+my $VERSION='$Revision: 1.126 $'; #' stupid emacs
+my $remoteVERSION;
+my $currenthostid;
+my $currentdomainid;
 #
 #  The array below are password error strings."
 #
@@ -169,7 +172,7 @@ undef $perlvarref;
 my $wwwid=getpwnam('www');
 if ($wwwid!=$<) {
    $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
-   $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
+   $subj="LON: $currenthostid User ID mismatch";
    system("echo 'User ID mismatch.  lond must be run as user www.' |\
  mailto $emailto -s '$subj' > /dev/null");
    exit 1;
@@ -196,6 +199,8 @@ while ($configline=<CONFIG>) {
     my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
     chomp($ip); $ip=~s/\D+$//;
     $hostid{$ip}=$id;
+    $hostdom{$id}=$domain;
+    $hostip{$id}=$ip;
     if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
     $PREFORK++;
 }
@@ -263,17 +268,25 @@ sub checkchildren {
         } 
     }
     sleep 5;
+    $SIG{ALRM} = sub { die "timeout" };
+    $SIG{__DIE__} = 'DEFAULT';
     foreach (sort keys %children) {
         unless (-e "$docdir/lon-status/londchld/$_.txt") {
+          eval {
+            alarm(300);
 	    &logthis('Child '.$_.' did not respond');
 	    kill 9 => $_;
 	    $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
-	    $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
+	    $subj="LON: $currenthostid killed lond process $_";
 	    my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
 	    $execdir=$perlvar{'lonDaemons'};
-	    $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
+	    $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
+	    alarm(0);
+	  }
         }
     }
+    $SIG{ALRM} = 'DEFAULT';
+    $SIG{__DIE__} = \&cathcexception;
 }
 
 # --------------------------------------------------------------------- Logging
@@ -301,7 +314,7 @@ sub logstatus {
     my $docdir=$perlvar{'lonDocRoot'};
     {
     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
-    print $fh $$."\t".$status."\t".$lastlog."\n";
+    print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
     $fh->close();
     }
     {
@@ -362,13 +375,6 @@ sub reconlonc {
         if (kill 0 => $loncpid) {
 	    &logthis("lonc at pid $loncpid responding, sending USR1");
             kill USR1 => $loncpid;
-            sleep 5;
-            if (-e "$peerfile") { return; }
-            &logthis("$peerfile still not there, give it another try");
-            sleep 10;
-            if (-e "$peerfile") { return; }
-            &logthis(
- "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
         } else {
 	    &logthis(
               "<font color=red>CRITICAL: "
@@ -398,12 +404,12 @@ sub subreply {
 sub reply {
   my ($cmd,$server)=@_;
   my $answer;
-  if ($server ne $perlvar{'lonHostID'}) { 
+  if ($server ne $currenthostid) { 
     $answer=subreply($cmd,$server);
     if ($answer eq 'con_lost') {
 	$answer=subreply("ping",$server);
         if ($answer ne $server) {
-	    &logthis("sub reply: answer != server");
+	    &logthis("sub reply: answer != server answer is $answer, server is $server");
            &reconlonc("$perlvar{'lonSockDir'}/$server");
         }
         $answer=subreply($cmd,$server);
@@ -530,6 +536,8 @@ sub make_new_child {
     } else {
         # Child can *not* return from this subroutine.
         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
+        $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
+                                #don't get intercepted
         $SIG{USR1}= \&logstatus;
         $SIG{ALRM}= \&timeout;
         $lastlog='Forked ';
@@ -556,15 +564,16 @@ sub make_new_child {
             my $clientip=inet_ntoa($iaddr);
             my $clientrec=($hostid{$clientip} ne undef);
             &logthis(
-"<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
+"<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
             );
             &status("Connecting $clientip ($hostid{$clientip})"); 
             my $clientok;
             if ($clientrec) {
 	      &status("Waiting for init from $clientip ($hostid{$clientip})");
 	      my $remotereq=<$client>;
-              $remotereq=~s/\W//g;
-              if ($remotereq eq 'init') {
+              $remotereq=~s/[^\w:]//g;
+              if ($remotereq =~ /^init/) {
+		  &sethost("sethost:$perlvar{'lonHostID'}");
 		  my $challenge="$$".time;
                   print $client "$challenge\n";
                   &status(
@@ -593,9 +602,15 @@ sub make_new_child {
             if ($clientok) {
 # ---------------- New known client connecting, could mean machine online again
 
-	      &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
-              &logthis(
-       "<font color=green>Established connection: $hostid{$clientip}</font>");
+		foreach my $id (keys(%hostip)) {
+		    if ($hostip{$id} ne $clientip ||
+		       $hostip{$currenthostid} eq $clientip) {
+			# no need to try to do recon's to myself
+			next;
+		    }
+		    &reconlonc("$perlvar{'lonSockDir'}/$id");
+		}
+		&logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
               &status('Will listen to '.$hostid{$clientip});
 # ------------------------------------------------------------ Process requests
               while (my $userinput=<$client>) {
@@ -623,17 +638,17 @@ sub make_new_child {
 # ------------------------------------------------------------- Normal commands
 # ------------------------------------------------------------------------ ping
 		   if ($userinput =~ /^ping/) {
-                       print $client "$perlvar{'lonHostID'}\n";
+                       print $client "$currenthostid\n";
 # ------------------------------------------------------------------------ pong
 		   } elsif ($userinput =~ /^pong/) {
                        $reply=reply("ping",$hostid{$clientip});
-                       print $client "$perlvar{'lonHostID'}:$reply\n"; 
+                       print $client "$currenthostid:$reply\n"; 
 # ------------------------------------------------------------------------ ekey
 		   } elsif ($userinput =~ /^ekey/) {
                        my $buildkey=time.$$.int(rand 100000);
                        $buildkey=~tr/1-6/A-F/;
                        $buildkey=int(rand 100000).$buildkey.int(rand 100000);
-                       my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
+                       my $key=$currenthostid.$hostid{$clientip};
                        $key=~tr/a-z/A-Z/;
                        $key=~tr/G-P/0-9/;
                        $key=~tr/Q-Z/0-9/;
@@ -845,7 +860,7 @@ sub make_new_child {
 				    $passfilename);
                        if (-e $passfilename) {
 			   print $client "already_exists\n";
-                       } elsif ($udom ne $perlvar{'lonDefDomain'}) {
+                       } elsif ($udom ne $currentdomainid) {
                            print $client "not_right_domain\n";
                        } else {
                            @fpparts=split(/\//,$proname);
@@ -856,7 +871,8 @@ sub make_new_child {
                                unless (-e $fpnow) {
 				   unless (mkdir($fpnow,0777)) {
                                       $fperror="error: ".($!+0)
-					  ." mkdir failed\n";
+					  ." mkdir failed while attempting "
+                                              ."makeuser\n";
                                    }
                                }
                            }
@@ -884,7 +900,7 @@ sub make_new_child {
                        $npass=&unescape($npass);
                        my $proname=&propath($udom,$uname);
                        my $passfilename="$proname/passwd";
-		       if ($udom ne $perlvar{'lonDefDomain'}) {
+		       if ($udom ne $currentdomainid) {
                            print $client "not_right_domain\n";
                        } else {
 			   my $result=&make_passwd_file($uname, $umode,$npass,
@@ -1028,7 +1044,8 @@ sub make_new_child {
                             print $client "ok\n"; 
 			} else {
                             print $client "error: ".($!+0)
-				." IO::File->new Failed\n";
+				." IO::File->new Failed "
+                                    ."while attempting log\n";
 		        }
 		       }
 # ------------------------------------------------------------------------- put
@@ -1048,7 +1065,7 @@ sub make_new_child {
 			       ) { print $hfh "P:$now:$what\n"; }
 		       }
                        my @pairs=split(/\&/,$what);
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                            foreach $pair (@pairs) {
 			       ($key,$value)=split(/=/,$pair);
                                $hash{$key}=$value;
@@ -1057,11 +1074,13 @@ sub make_new_child {
                               print $client "ok\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) failed\n";
+				  ." untie(GDBM) failed ".
+                                      "while attempting put\n";
                            }
                        } else {
                            print $client "error: ".($!)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting put\n";
                        }
 		      } else {
                           print $client "refused\n";
@@ -1088,7 +1107,7 @@ sub make_new_child {
                                  }
 		       }
                        my @pairs=split(/\&/,$what);
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                            foreach $pair (@pairs) {
 			       ($key,$value)=split(/=/,$pair);
 			       &ManagePermissions($key, $udom, $uname,
@@ -1101,11 +1120,55 @@ sub make_new_child {
                               print $client "ok\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting rolesput\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting rolesput\n";
+                       }
+		      } else {
+                          print $client "refused\n";
+                      }
+# -------------------------------------------------------------------- rolesdel
+                   } elsif ($userinput =~ /^rolesdel/) {
+		       &Debug("rolesdel");
+		    if ($wasenc==1) {
+                       my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
+                          =split(/:/,$userinput);
+		       &Debug("cmd = ".$cmd." exedom= ".$exedom.
+				    "user = ".$exeuser." udom=".$udom.
+				    "what = ".$what);
+                       my $namespace='roles';
+                       chomp($what);
+                       my $proname=propath($udom,$uname);
+                       my $now=time;
+                       {
+			   my $hfh;
+			   if (
+                             $hfh=IO::File->new(">>$proname/$namespace.hist")
+			       ) { 
+                                  print $hfh "D:$now:$exedom:$exeuser:$what\n";
+                                 }
+		       }
+                       my @rolekeys=split(/\&/,$what);
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+                           foreach $key (@rolekeys) {
+                               delete $hash{$key};
+			       
+                           }
+			   if (untie(%hash)) {
+                              print $client "ok\n";
+                           } else {
+                              print $client "error: ".($!+0)
+				  ." untie(GDBM) Failed ".
+                                      "while attempting rolesdel\n";
+                           }
+                       } else {
+                           print $client "error: ".($!+0)
+			       ." tie(GDBM) Failed ".
+                                   "while attempting rolesdel\n";
                        }
 		      } else {
                           print $client "refused\n";
@@ -1120,7 +1183,7 @@ sub make_new_child {
                        my @queries=split(/\&/,$what);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -1129,11 +1192,18 @@ sub make_new_child {
                               print $client "$qresult\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting get\n";
                            }
                        } else {
-                           print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+                           if ($!+0 == 2) {
+                               print $client "error:No such file or ".
+                                   "GDBM reported bad block error\n";
+                           } else {
+                               print $client "error: ".($!+0)
+                                   ." tie(GDBM) Failed ".
+                                       "while attempting get\n";
+                           }
                        }
 # ------------------------------------------------------------------------ eget
                    } elsif ($userinput =~ /^eget/) {
@@ -1145,7 +1215,7 @@ sub make_new_child {
                        my @queries=split(/\&/,$what);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -1167,11 +1237,13 @@ sub make_new_child {
                               }
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting eget\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting eget\n";
                        }
 # ------------------------------------------------------------------------- del
                    } elsif ($userinput =~ /^del/) {
@@ -1189,7 +1261,7 @@ sub make_new_child {
 			       ) { print $hfh "D:$now:$what\n"; }
 		       }
                        my @keys=split(/\&/,$what);
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                            foreach $key (@keys) {
                                delete($hash{$key});
                            }
@@ -1197,11 +1269,13 @@ sub make_new_child {
                               print $client "ok\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting del\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting del\n";
                        }
 # ------------------------------------------------------------------------ keys
                    } elsif ($userinput =~ /^keys/) {
@@ -1211,7 +1285,7 @@ sub make_new_child {
                        $namespace=~s/\W//g;
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                            foreach $key (keys %hash) {
                                $qresult.="$key&";
                            }
@@ -1220,11 +1294,13 @@ sub make_new_child {
                               print $client "$qresult\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting keys\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting keys\n";
                        }
 # ----------------------------------------------------------------- dumpcurrent
                    } elsif ($userinput =~ /^currentdump/) {
@@ -1263,11 +1339,13 @@ sub make_new_child {
                              print $client "$qresult\n";
                            } else {
                              print $client "error: ".($!+0)
-				 ." untie(GDBM) Failed\n";
+				 ." untie(GDBM) Failed ".
+                                     "while attempting currentdump\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                      "while attempting currentdump\n";
                        }
 # ------------------------------------------------------------------------ dump
                    } elsif ($userinput =~ /^dump/) {
@@ -1299,11 +1377,13 @@ sub make_new_child {
                                print $client "$qresult\n";
                            } else {
                                print $client "error: ".($!+0)
-				   ." untie(GDBM) Failed\n";
+				   ." untie(GDBM) Failed ".
+                                       "while attempting dump\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                      "while attempting dump\n";
                        }
 # ----------------------------------------------------------------------- store
                    } elsif ($userinput =~ /^store/) {
@@ -1323,7 +1403,7 @@ sub make_new_child {
 		       }
                        my @pairs=split(/\&/,$what);
                          
-    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                            my @previouskeys=split(/&/,$hash{"keys:$rid"});
                            my $key;
                            $hash{"version:$rid"}++;
@@ -1341,11 +1421,13 @@ sub make_new_child {
                               print $client "ok\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting store\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting store\n";
                        }
 		      } else {
                           print $client "refused\n";
@@ -1359,7 +1441,7 @@ sub make_new_child {
                        chomp($rid);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                 	   my $version=$hash{"version:$rid"};
                            $qresult.="version=$version&";
                            my $scope;
@@ -1377,11 +1459,13 @@ sub make_new_child {
                               print $client "$qresult\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting restore\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting restore\n";
                        }
 # -------------------------------------------------------------------- chatsend
                    } elsif ($userinput =~ /^chatsend/) {
@@ -1390,9 +1474,10 @@ sub make_new_child {
                        print $client "ok\n";
 # -------------------------------------------------------------------- chatretr
                    } elsif ($userinput =~ /^chatretr/) {
-                       my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
+                       my 
+                        ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
                        my $reply='';
-                       foreach (&getchat($cdom,$cnum)) {
+                       foreach (&getchat($cdom,$cnum,$udom,$uname)) {
 			   $reply.=&escape($_).':';
                        }
                        $reply=~s/\:$//;
@@ -1421,8 +1506,74 @@ sub make_new_child {
 		       }
 		       else {
 			   print $client "error: ".($!+0)
-			       ." IO::File->new Failed\n";
+			       ." IO::File->new Failed ".
+                                   "while attempting queryreply\n";
 		       }
+# ----------------------------------------------------------------- courseidput
+                   } elsif ($userinput =~ /^courseidput/) {
+                       my ($cmd,$udom,$what)=split(/:/,$userinput);
+                       chomp($what);
+                       $udom=~s/\W//g;
+                       my $proname=
+                              "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+                       my $now=time;
+                       my @pairs=split(/\&/,$what);
+                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
+                           foreach $pair (@pairs) {
+			       ($key,$value)=split(/=/,$pair);
+                               $hash{$key}=$value.':'.$now;
+                           }
+			   if (untie(%hash)) {
+                              print $client "ok\n";
+                           } else {
+                              print $client "error: ".($!+0)
+				  ." untie(GDBM) Failed ".
+                                      "while attempting courseidput\n";
+                           }
+                       } else {
+                           print $client "error: ".($!+0)
+			       ." tie(GDBM) Failed ".
+                                      "while attempting courseidput\n";
+                       }
+# ---------------------------------------------------------------- courseiddump
+                   } elsif ($userinput =~ /^courseiddump/) {
+                       my ($cmd,$udom,$since,$description)
+                          =split(/:/,$userinput);
+                       if (defined($description)) {
+                          $description=&unescape($description);
+		       } else {
+                          $description='.';
+		       }
+                       unless (defined($since)) { $since=0; }
+                       my $qresult='';
+                       my $proname=
+                              "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+                if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
+                           while (($key,$value) = each(%hash)) {
+                               my ($descr,$lasttime)=split(/\:/,$value);
+                               if ($lasttime<$since) { next; }
+                               if ($regexp eq '.') {
+                                   $qresult.=$key.'='.$descr.'&';
+                               } else {
+                                   my $unescapeVal = &unescape($descr);
+                                   if (eval('$unescapeVal=~/$description/i')) {
+                                       $qresult.="$key=$descr&";
+                                   }
+                               }
+                           }
+                           if (untie(%hash)) {
+                               chop($qresult);
+                               print $client "$qresult\n";
+                           } else {
+                               print $client "error: ".($!+0)
+				   ." untie(GDBM) Failed ".
+                                       "while attempting courseiddump\n";
+                           }
+                       } else {
+                           print $client "error: ".($!+0)
+			       ." tie(GDBM) Failed ".
+                                      "while attempting courseiddump\n";
+                       }
 # ----------------------------------------------------------------------- idput
                    } elsif ($userinput =~ /^idput/) {
                        my ($cmd,$udom,$what)=split(/:/,$userinput);
@@ -1437,7 +1588,7 @@ sub make_new_child {
 			       ) { print $hfh "P:$now:$what\n"; }
 		       }
                        my @pairs=split(/\&/,$what);
-                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
+                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                            foreach $pair (@pairs) {
 			       ($key,$value)=split(/=/,$pair);
                                $hash{$key}=$value;
@@ -1446,11 +1597,13 @@ sub make_new_child {
                               print $client "ok\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting idput\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                      "while attempting idput\n";
                        }
 # ----------------------------------------------------------------------- idget
                    } elsif ($userinput =~ /^idget/) {
@@ -1460,7 +1613,7 @@ sub make_new_child {
                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                        my @queries=split(/\&/,$what);
                        my $qresult='';
-                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
+                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -1469,11 +1622,13 @@ sub make_new_child {
                               print $client "$qresult\n";
                            } else {
                               print $client "error: ".($!+0)
-				  ." untie(GDBM) Failed\n";
+				  ." untie(GDBM) Failed ".
+                                      "while attempting idget\n";
                            }
                        } else {
                            print $client "error: ".($!+0)
-			       ." tie(GDBM) Failed\n";
+			       ." tie(GDBM) Failed ".
+                                   "while attempting idget\n";
                        }
 # ---------------------------------------------------------------------- tmpput
                    } elsif ($userinput =~ /^tmpput/) {
@@ -1491,7 +1646,8 @@ sub make_new_child {
 		       }
 		       else {
 			   print $client "error: ".($!+0)
-			       ."IO::File->new Failed\n";
+			       ."IO::File->new Failed ".
+                                   "while attempting tmpput\n";
 		       }
 
 # ---------------------------------------------------------------------- tmpget
@@ -1508,7 +1664,8 @@ sub make_new_child {
 		       }
 		       else {
 			   print $client "error: ".($!+0)
-			       ."IO::File->new Failed\n";
+			       ."IO::File->new Failed ".
+                                   "while attempting tmpget\n";
 		       }
 
 # ---------------------------------------------------------------------- tmpdel
@@ -1521,7 +1678,8 @@ sub make_new_child {
 			   print $client "ok\n";
 		       } else {
 			   print $client "error: ".($!+0)
-			       ."Unlink tmp Failed\n";
+			       ."Unlink tmp Failed ".
+                                   "while attempting tmpdel\n";
 		       }
 # -------------------------------------------------------------------------- ls
                    } elsif ($userinput =~ /^ls/) {
@@ -1556,6 +1714,10 @@ sub make_new_child {
                        $client->close();
 		       last;
 # ------------------------------------------------------------- unknown command
+		   } elsif ($userinput =~ /^sethost:/) {
+		       print $client &sethost($userinput)."\n";
+		   } elsif ($userinput =~/^version:/) {
+		       print $client &version($userinput)."\n";
                    } else {
                        # unknown command
                        print $client "unknown_cmd\n";
@@ -1667,7 +1829,7 @@ sub addline {
 }
 
 sub getchat {
-    my ($cdom,$cname)=@_;
+    my ($cdom,$cname,$udom,$uname)=@_;
     my %hash;
     my $proname=&propath($cdom,$cname);
     my @entries=();
@@ -1676,7 +1838,19 @@ sub getchat {
 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
 	untie %hash;
     }
-    return @entries;
+    my @participants=();
+    $cutoff=time-60;
+    if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
+	    &GDBM_WRCREAT(),0640)) {
+        $hash{$uname.':'.$udom}=time;
+        foreach (sort keys %hash) {
+	    if ($hash{$_}>$cutoff) {
+		$participants[$#participants+1]='active_participant:'.$_;
+            }
+        }
+        untie %hash;
+    }
+    return (@participants,@entries);
 }
 
 sub chatadd {
@@ -1733,20 +1907,26 @@ sub currentversion {
     if ($fname=~/^(.+)\/[^\/]+$/) {
        $ulsdir=$1;
     }
+    my ($fnamere1,$fnamere2);
+    # remove version if already specified
     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
-    $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
-
+    # get the bits that go before and after the version number
+    if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
+	$fnamere1=$1;
+	$fnamere2='.'.$2;
+    }
     if (-e $fname) { $version=1; }
     if (-e $ulsdir) {
        if(-d $ulsdir) {
           if (opendir(LSDIR,$ulsdir)) {
+
              while ($ulsfn=readdir(LSDIR)) {
 # see if this is a regular file (ignore links produced earlier)
                  my $thisfile=$ulsdir.'/'.$ulsfn;
                  unless (-l $thisfile) {
-		    if ($thisfile=~/$fname/) {
-		        if ($1>$version) { $version=$1; }
-                    }
+		     if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
+			 if ($1>$version) { $version=$1; }
+		     }
 		 }
              }
              closedir(LSDIR);
@@ -1865,6 +2045,28 @@ sub make_passwd_file {
     return $result;
 }
 
+sub sethost {
+    my ($remotereq) = @_;
+    my (undef,$hostid)=split(/:/,$remotereq);
+    if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
+    if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
+	$currenthostid=$hostid;
+	$currentdomainid=$hostdom{$hostid};
+	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
+    } else {
+	&logthis("Requested host id $hostid not an alias of ".
+		 $perlvar{'lonHostID'}." refusing connection");
+	return 'unable_to_set';
+    }
+    return 'ok';
+}
+
+sub version {
+    my ($userinput)=@_;
+    $remoteVERSION=(split(/:/,$userinput))[1];
+    return "version:$VERSION";
+}
+
 # ----------------------------------- POD (plain old documentation, CPAN style)
 
 =head1 NAME