--- loncom/lonnet/perl/lonnet.pm	2015/06/16 20:24:59	1.1289
+++ loncom/lonnet/perl/lonnet.pm	2017/02/25 20:00:41	1.1337
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1289 2015/06/16 20:24:59 damieng Exp $
+# $Id: lonnet.pm,v 1.1337 2017/02/25 20:00:41 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -229,6 +229,48 @@ sub get_server_distarch {
     return;
 }
 
+sub get_servercerts_info {
+    my ($lonhost,$context) = @_;
+    my ($rep,$uselocal);
+    if (grep { $_ eq $lonhost } &current_machine_ids()) {
+        $uselocal = 1;
+    }
+    if (($context ne 'cgi') && ($uselocal)) {
+        my $distro = (split(/\:/,&get_server_distarch($lonhost)))[0];
+        if ($distro eq '') {
+            $uselocal = 0;
+        } elsif ($distro =~ /^(?:centos|redhat|scientific)(\d+)$/) {
+            if ($1 < 6) {
+                $uselocal = 0;
+            }
+        }
+    }
+    if ($uselocal) {
+        $rep = LONCAPA::Lond::server_certs(\%perlvar);
+    } else {
+        $rep=&reply('servercerts',$lonhost);
+    }
+    my ($result,%returnhash);
+    if (defined($lonhost)) {
+        if (!defined(&hostname($lonhost))) {
+            return;
+        }
+    }
+    if (($rep=~/^(refused|rejected|error)/) || ($rep eq 'con_lost') ||
+        ($rep eq 'unknown_cmd')) {
+        $result = $rep;
+    } else {
+        $result = 'ok';
+        my @pairs=split(/\&/,$rep);
+        foreach my $item (@pairs) {
+            my ($key,$value)=split(/=/,$item,2);
+            my $what = &unescape($key);
+            $returnhash{$what}=&thaw_unescape($value);
+        }
+    }
+    return ($result,\%returnhash);
+}
+
 sub get_server_loncaparev {
     my ($dom,$lonhost,$ignore_cache,$caller) = @_;
     if (defined($lonhost)) {
@@ -422,8 +464,8 @@ sub reply {
 
 sub reconlonc {
     my ($lonid) = @_;
-    my $hostname = &hostname($lonid);
     if ($lonid) {
+        my $hostname = &hostname($lonid);
 	my $peerfile="$perlvar{'lonSockDir'}/$hostname";
 	if ($hostname && -e $peerfile) {
 	    &logthis("Trying to reconnect lonc for $lonid ($hostname)");
@@ -448,7 +490,7 @@ sub reconlonc {
 	    &logthis("lonc at pid $loncpid responding, sending USR1");
             kill USR1 => $loncpid;
             sleep 1;
-         } else {
+        } else {
 	    &logthis(
                "<font color=\"blue\">WARNING:".
                " lonc at pid $loncpid not responding, giving up</font>");
@@ -469,7 +511,7 @@ sub critical {
     }
     my $answer=reply($cmd,$server);
     if ($answer eq 'con_lost') {
-	&reconlonc("$perlvar{'lonSockDir'}/$server");
+	&reconlonc($server);
 	my $answer=reply($cmd,$server);
         if ($answer eq 'con_lost') {
             my $now=time;
@@ -608,10 +650,23 @@ sub transfer_profile_to_env {
 sub check_for_valid_session {
     my ($r,$name,$userhashref) = @_;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
+    my ($linkname,$pubname);
     if ($name eq '') {
         $name = 'lonID';
+        $linkname = 'lonLinkID';
+        $pubname = 'lonPubID';
     }
     my $lonid=$cookies{$name};
+    if (!$lonid) {
+        if (($name eq 'lonID') && ($ENV{'SERVER_PORT'} != 443) && ($linkname)) {
+            $lonid=$cookies{$linkname};
+        }
+        if (!$lonid) {
+            if (($name eq 'lonID') && ($pubname)) {
+                $lonid=$cookies{$pubname};
+            }
+        }
+    }
     return undef if (!$lonid);
 
     my $handle=&LONCAPA::clean_handle($lonid->value);
@@ -1007,7 +1062,7 @@ sub choose_server {
     if ($login_host ne '') {
         $hostname = &hostname($login_host);
     }
-    return ($login_host,$hostname,$portal_path,$isredirect);
+    return ($login_host,$hostname,$portal_path,$isredirect,$lowest_load);
 }
 
 # --------------------------------------------- Try to change a user's password
@@ -1279,7 +1334,7 @@ sub get_lonbalancer_config {
 }
 
 sub check_loadbalancing {
-    my ($uname,$udom) = @_;
+    my ($uname,$udom,$caller) = @_;
     my ($is_balancer,$currtargets,$currrules,$dom_in_use,$homeintdom,
         $rule_in_effect,$offloadto,$otherserver);
     my $lonhost = $perlvar{'lonHostID'};
@@ -1288,7 +1343,7 @@ sub check_loadbalancing {
     my $uintdom = &Apache::lonnet::internet_dom($uprimary_id);
     my $intdom = &Apache::lonnet::internet_dom($lonhost);
     my $serverhomedom = &host_domain($lonhost);
-
+    my $domneedscache;
     my $cachetime = 60*60*24;
 
     if (($uintdom ne '') && ($uintdom eq $intdom)) {
@@ -1303,6 +1358,8 @@ sub check_loadbalancing {
             &Apache::lonnet::get_dom('configuration',['loadbalancing'],$dom_in_use);
         if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
             $result = &do_cache_new('loadbalancing',$dom_in_use,$domconfig{'loadbalancing'},$cachetime);
+        } else {
+            $domneedscache = $dom_in_use;
         }
     }
     if (ref($result) eq 'HASH') {
@@ -1361,7 +1418,9 @@ sub check_loadbalancing {
             my %domconfig =
                 &Apache::lonnet::get_dom('configuration',['loadbalancing'],$serverhomedom);
             if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
-                $result = &do_cache_new('loadbalancing',$dom_in_use,$domconfig{'loadbalancing'},$cachetime);
+                $result = &do_cache_new('loadbalancing',$serverhomedom,$domconfig{'loadbalancing'},$cachetime);
+            } else {
+                $domneedscache = $serverhomedom;
             }
         }
         if (ref($result) eq 'HASH') {
@@ -1381,12 +1440,21 @@ sub check_loadbalancing {
                 $is_balancer = 1;
                 $offloadto = &this_host_spares($dom_in_use);
             }
+            unless (defined($cached)) {
+                $domneedscache = $serverhomedom;
+            }
         }
     } else {
         if ($perlvar{'lonBalancer'} eq 'yes') {
             $is_balancer = 1;
             $offloadto = &this_host_spares($dom_in_use);
         }
+        unless (defined($cached)) {
+            $domneedscache = $serverhomedom;
+        }
+    }
+    if ($domneedscache) {
+        &do_cache_new('loadbalancing',$domneedscache,$is_balancer,$cachetime);
     }
     if ($is_balancer) {
         my $lowest_load = 30000;
@@ -1417,13 +1485,15 @@ sub check_loadbalancing {
                 }
             }
         }
-        if (($otherserver ne '') && (grep(/^\Q$otherserver\E$/,@hosts))) {
-            $is_balancer = 0;
-            if ($uname ne '' && $udom ne '') {
-                if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
+        unless ($caller eq 'login') {
+            if (($otherserver ne '') && (grep(/^\Q$otherserver\E$/,@hosts))) {
+                $is_balancer = 0;
+                if ($uname ne '' && $udom ne '') {
+                    if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
                     
-                    &appenv({'user.loadbalexempt'     => $lonhost,  
-                             'user.loadbalcheck.time' => time});
+                        &appenv({'user.loadbalexempt'     => $lonhost,  
+                                 'user.loadbalcheck.time' => time});
+                    }
                 }
             }
         }
@@ -1551,17 +1621,33 @@ sub homeserver {
     return 'no_host';
 }
 
-# ------------------------------------- Find the usernames behind a list of IDs
+# ----- Find the usernames behind a list of student/employee IDs or clicker IDs
 
 sub idget {
-    my ($udom,@ids)=@_;
+    my ($udom,$idsref,$namespace)=@_;
     my %returnhash=();
+    my @ids=(); 
+    if (ref($idsref) eq 'ARRAY') {
+        @ids = @{$idsref};
+    } else {
+        return %returnhash; 
+    }
+    if ($namespace eq '') {
+        $namespace = 'ids';
+    }
     
     my %servers = &get_servers($udom,'library');
     foreach my $tryserver (keys(%servers)) {
-	my $idlist=join('&',@ids);
-	$idlist=~tr/A-Z/a-z/; 
-	my $reply=&reply("idget:$udom:".$idlist,$tryserver);
+	my $idlist=join('&', map { &escape($_); } @ids);
+	if ($namespace eq 'ids') {
+	    $idlist=~tr/A-Z/a-z/;
+	}
+	my $reply;
+	if ($namespace eq 'ids') {
+	    $reply=&reply("idget:$udom:".$idlist,$tryserver);
+	} else {
+	    $reply=&reply("getdom:$udom:$namespace:$idlist",$tryserver);
+	}
 	my @answer=();
 	if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
 	    @answer=split(/\&/,$reply);
@@ -1569,10 +1655,10 @@ sub idget {
 	my $i;
 	for ($i=0;$i<=$#ids;$i++) {
 	    if ($answer[$i]) {
-		$returnhash{$ids[$i]}=$answer[$i];
-	    } 
+		$returnhash{$ids[$i]}=&unescape($answer[$i]);
+	    }
 	}
-    } 
+    }
     return %returnhash;
 }
 
@@ -1587,60 +1673,141 @@ sub idrget {
     return %returnhash;
 }
 
-# ------------------------------- Store away a list of names and associated IDs
+# Store away a list of names and associated student/employee IDs or clicker IDs
 
 sub idput {
-    my ($udom,%ids)=@_;
+    my ($udom,$idsref,$uhom,$namespace)=@_;
     my %servers=();
+    my %ids=();
+    my %byid = ();
+    if (ref($idsref) eq 'HASH') {
+        %ids=%{$idsref};
+    }
+    if ($namespace eq '') {
+        $namespace = 'ids'; 
+    }
     foreach my $uname (keys(%ids)) {
 	&cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
-        my $uhom=&homeserver($uname,$udom);
+        if ($uhom eq '') {
+            $uhom=&homeserver($uname,$udom);
+        }
         if ($uhom ne 'no_host') {
-            my $id=&escape($ids{$uname});
-            $id=~tr/A-Z/a-z/;
             my $esc_unam=&escape($uname);
-	    if ($servers{$uhom}) {
-		$servers{$uhom}.='&'.$id.'='.$esc_unam;
+            if ($namespace eq 'ids') {
+                my $id=&escape($ids{$uname});
+                $id=~tr/A-Z/a-z/;
+                my $esc_unam=&escape($uname);
+                $servers{$uhom}.=$id.'='.$esc_unam.'&';
             } else {
-                $servers{$uhom}=$id.'='.$esc_unam;
+                my @currids = split(/,/,$ids{$uname});
+                foreach my $id (@currids) {
+                    $byid{$uhom}{$id} .= $uname.',';
+                }
+            }
+        }
+    }
+    if ($namespace eq 'clickers') {
+        foreach my $server (keys(%byid)) {
+            if (ref($byid{$server}) eq 'HASH') {
+                foreach my $id (keys(%{$byid{$server}})) {
+                    $byid{$server} =~ s/,$//;
+                    $servers{$uhom}.=&escape($id).'='.&escape($byid{$server}).'&'; 
+                }
             }
         }
     }
     foreach my $server (keys(%servers)) {
-        &critical('idput:'.$udom.':'.$servers{$server},$server);
+        $servers{$server} =~ s/\&$//;
+        if ($namespace eq 'ids') {     
+            &critical('idput:'.$udom.':'.$servers{$server},$server);
+        } else {
+            &critical('updateclickers:'.$udom.':add:'.$servers{$server},$server);
+        }
     }
 }
 
-# ---------------------------------------- Delete unwanted IDs from ids.db file 
+# ------------- Delete unwanted student/employee IDs or clicker IDs from domain
 
 sub iddel {
-    my ($udom,$idshashref,$uhome)=@_;
+    my ($udom,$idshashref,$uhome,$namespace)=@_;
     my %result=();
-    unless (ref($idshashref) eq 'HASH') {
+    my %ids=();
+    my %byid = ();
+    if (ref($idshashref) eq 'HASH') {
+        %ids=%{$idshashref};
+    } else {
         return %result;
     }
+    if ($namespace eq '') {
+        $namespace = 'ids';
+    }
     my %servers=();
-    while (my ($id,$uname) = each(%{$idshashref})) {
-        my $uhom;
-        if ($uhome) {
-            $uhom = $uhome;
-        } else {
-            $uhom=&homeserver($uname,$udom);
-        }
-        if ($uhom ne 'no_host') {
-            if ($servers{$uhom}) {
+    while (my ($id,$unamestr) = each(%ids)) {
+        if ($namespace eq 'ids') {
+            my $uhom = $uhome;
+            if ($uhom eq '') { 
+                $uhom=&homeserver($unamestr,$udom);
+            }
+            if ($uhom ne 'no_host') {
                 $servers{$uhom}.='&'.&escape($id);
-            } else {
-                $servers{$uhom}=&escape($id);
+            }
+         } else {
+            my @curritems = split(/,/,$ids{$id});
+            foreach my $uname (@curritems) {
+                my $uhom = $uhome;
+                if ($uhom eq '') {
+                    $uhom=&homeserver($uname,$udom);
+                }
+                if ($uhom ne 'no_host') { 
+                    $byid{$uhom}{$id} .= $uname.',';
+                }
+            }
+        }
+    }
+    if ($namespace eq 'clickers') {
+        foreach my $server (keys(%byid)) {
+            if (ref($byid{$server}) eq 'HASH') {
+                foreach my $id (keys(%{$byid{$server}})) {
+                    $byid{$server}{$id} =~ s/,$//;
+                    $servers{$server}.=&escape($id).'='.&escape($byid{$server}{$id}).'&';
+                }
             }
         }
     }
     foreach my $server (keys(%servers)) {
-        $result{$server} = &critical('iddel:'.$udom.':'.$servers{$server},$uhome);
+        $servers{$server} =~ s/\&$//;
+        if ($namespace eq 'ids') {
+            $result{$server} = &critical('iddel:'.$udom.':'.$servers{$server},$uhome);
+        } elsif ($namespace eq 'clickers') {
+            $result{$server} = &critical('updateclickers:'.$udom.':del:'.$servers{$server},$server);
+        }
     }
     return %result;
 }
 
+# ----- Update clicker ID-to-username look-ups in clickers.db on library server 
+
+sub updateclickers {
+    my ($udom,$action,$idshashref,$uhome,$critical) = @_;
+    my %clickers;
+    if (ref($idshashref) eq 'HASH') {
+        %clickers=%{$idshashref};
+    } else {
+        return;
+    }
+    my $items='';
+    foreach my $item (keys(%clickers)) {
+        $items.=&escape($item).'='.&escape($clickers{$item}).'&';
+    }
+    $items=~s/\&$//;
+    my $request = "updateclickers:$udom:$action:$items";
+    if ($critical) {
+        return &critical($request,$uhome);
+    } else {
+        return &reply($request,$uhome);
+    }
+}
+
 # ------------------------------dump from db file owned by domainconfig user
 sub dump_dom {
     my ($namespace, $udom, $regexp) = @_;
@@ -1798,7 +1965,7 @@ sub retrieve_inst_usertypes {
 
 sub is_domainimage {
     my ($url) = @_;
-    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+-) {
+    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+[^/]-) {
         if (&domain($1) ne '') {
             return '1';
         }
@@ -1939,6 +2106,63 @@ sub get_instuser {
     return ($outcome,%userinfo);
 }
 
+sub get_multiple_instusers {
+    my ($udom,$users,$caller) = @_;
+    my ($outcome,$results);
+    if (ref($users) eq 'HASH') {
+        my $count = keys(%{$users}); 
+        my $requested = &freeze_escape($users);
+        my $homeserver = &domain($udom,'primary');
+        if ($homeserver ne '') {
+            my $queryid=&reply('querysend:getmultinstusers:::'.$caller.'='.$requested,$homeserver);
+            my $host=&hostname($homeserver);
+            if ($queryid !~/^\Q$host\E\_/) {
+                &logthis('get_multiple_instusers invalid queryid: '.$queryid.
+                         ' for host: '.$homeserver.'in domain '.$udom);
+                return ($outcome,$results);
+            }
+            my $response = &get_query_reply($queryid);
+            my $maxtries = 5;
+            if ($count > 100) {
+                $maxtries = 1+int($count/20);
+            }
+            my $tries = 1;
+            while (($response=~/^timeout/) && ($tries <= $maxtries)) {
+                $response = &get_query_reply($queryid);
+                $tries ++;
+            }
+            if ($response eq '') {
+                $results = {};
+                foreach my $key (keys(%{$users})) {
+                    my ($uname,$id);
+                    if ($caller eq 'id') {
+                        $id = $key;
+                    } else {
+                        $uname = $key;
+                    }
+                    my ($resp,%info) = &get_instuser($udom,$uname,$id);
+                    $outcome = $resp;
+                    if ($resp eq 'ok') {
+                        %{$results} = (%{$results}, %info);
+                    } else {
+                        last;
+                    }
+                }
+            } elsif(!&error($response) && ($response ne 'refused')) {
+                if (($response eq 'unavailable') || ($response eq 'invalid') || ($response eq 'timeout')) {
+                    $outcome = $response;
+                } else {
+                    ($outcome,my $userdata) = split(/=/,$response,2);
+                    if ($outcome eq 'ok') {
+                        $results = &thaw_unescape($userdata); 
+                    }
+                }
+            }
+        }
+    }
+    return ($outcome,$results);
+}
+
 sub inst_rulecheck {
     my ($udom,$uname,$id,$item,$rules) = @_;
     my %returnhash;
@@ -2035,8 +2259,9 @@ sub get_domain_defaults {
                                   'requestcourses','inststatus',
                                   'coursedefaults','usersessions',
                                   'requestauthor','selfenrollment',
-                                  'coursecategories'],$domain);
-    my @coursetypes = ('official','unofficial','community','textbook');
+                                  'coursecategories','ssl','autoenroll',
+                                  'trust','helpsettings'],$domain);
+    my @coursetypes = ('official','unofficial','community','textbook','placement');
     if (ref($domconfig{'defaults'}) eq 'HASH') {
         $domdefaults{'lang_def'} = $domconfig{'defaults'}{'lang_def'}; 
         $domdefaults{'auth_def'} = $domconfig{'defaults'}{'auth_def'};
@@ -2066,7 +2291,7 @@ sub get_domain_defaults {
         }
     }
     if (ref($domconfig{'requestcourses'}) eq 'HASH') {
-        foreach my $item ('official','unofficial','community','textbook') {
+        foreach my $item ('official','unofficial','community','textbook','placement') {
             $domdefaults{$item} = $domconfig{'requestcourses'}{$item};
         }
     }
@@ -2161,10 +2386,51 @@ sub get_domain_defaults {
             $domdefaults{'catunauth'} = $domconfig{'coursecategories'}{'unauth'};
         }
     }
+    if (ref($domconfig{'ssl'}) eq 'HASH') {
+        if (ref($domconfig{'ssl'}{'replication'}) eq 'HASH') {
+            $domdefaults{'replication'} = $domconfig{'ssl'}{'replication'};
+        }
+        if (ref($domconfig{'ssl'}{'connect'}) eq 'HASH') {
+            $domdefaults{'connect'} = $domconfig{'ssl'}{'connect'};
+        }
+    }
+    if (ref($domconfig{'trust'}) eq 'HASH') {
+        my @prefixes = qw(content shared enroll othcoau coaurem domroles catalog reqcrs msg);
+        foreach my $prefix (@prefixes) {
+            if (ref($domconfig{'trust'}{$prefix}) eq 'HASH') {
+                $domdefaults{'trust'.$prefix} = $domconfig{'trust'}{$prefix};
+            }
+        }
+    }
+    if (ref($domconfig{'autoenroll'}) eq 'HASH') {
+        $domdefaults{'autofailsafe'} = $domconfig{'autoenroll'}{'autofailsafe'};
+    }
+    if (ref($domconfig{'helpsettings'}) eq 'HASH') {
+        $domdefaults{'submitbugs'} = $domconfig{'helpsettings'}{'submitbugs'};
+        if (ref($domconfig{'helpsettings'}{'adhoc'}) eq 'HASH') {
+            $domdefaults{'adhocroles'} = $domconfig{'helpsettings'}{'adhoc'};
+        }
+    }
     &do_cache_new('domdefaults',$domain,\%domdefaults,$cachetime);
     return %domdefaults;
 }
 
+sub course_portal_url {
+    my ($cnum,$cdom) = @_;
+    my $chome = &homeserver($cnum,$cdom);
+    my $hostname = &hostname($chome);
+    my $protocol = $protocol{$chome};
+    $protocol = 'http' if ($protocol ne 'https');
+    my %domdefaults = &get_domain_defaults($cdom);
+    my $firsturl;
+    if ($domdefaults{'portal_def'}) {
+        $firsturl = $domdefaults{'portal_def'};
+    } else {
+        $firsturl = $protocol.'://'.$hostname;
+    }
+    return $firsturl;
+}
+
 # --------------------------------------------------- Assign a key to a student
 
 sub assign_access_key {
@@ -2401,21 +2667,23 @@ sub make_key {
 sub devalidate_cache_new {
     my ($name,$id,$debug) = @_;
     if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
+    my $remembered_id=$name.':'.$id;
     $id=&make_key($name,$id);
     $memcache->delete($id);
-    delete($remembered{$id});
-    delete($accessed{$id});
+    delete($remembered{$remembered_id});
+    delete($accessed{$remembered_id});
 }
 
 sub is_cached_new {
     my ($name,$id,$debug) = @_;
-    $id=&make_key($name,$id);
-    if (exists($remembered{$id})) {
-	if ($debug) { &Apache::lonnet::logthis("Early return $id of $remembered{$id} "); }
-	$accessed{$id}=[&gettimeofday()];
+    my $remembered_id=$name.':'.$id; # this is to avoid make_key (which is slow) whenever possible
+    if (exists($remembered{$remembered_id})) {
+	if ($debug) { &Apache::lonnet::logthis("Early return $remembered_id of $remembered{$remembered_id} "); }
+	$accessed{$remembered_id}=[&gettimeofday()];
 	$hits++;
-	return ($remembered{$id},1);
+	return ($remembered{$remembered_id},1);
     }
+    $id=&make_key($name,$id);
     my $value = $memcache->get($id);
     if (!(defined($value))) {
 	if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
@@ -2425,13 +2693,14 @@ sub is_cached_new {
 	if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
 	$value=undef;
     }
-    &make_room($id,$value,$debug);
+    &make_room($remembered_id,$value,$debug);
     if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
     return ($value,1);
 }
 
 sub do_cache_new {
     my ($name,$id,$value,$time,$debug) = @_;
+    my $remembered_id=$name.':'.$id;
     $id=&make_key($name,$id);
     my $setvalue=$value;
     if (!defined($setvalue)) {
@@ -2447,17 +2716,17 @@ sub do_cache_new {
 	$memcache->disconnect_all();
     }
     # need to make a copy of $value
-    &make_room($id,$value,$debug);
+    &make_room($remembered_id,$value,$debug);
     return $value;
 }
 
 sub make_room {
-    my ($id,$value,$debug)=@_;
+    my ($remembered_id,$value,$debug)=@_;
 
-    $remembered{$id}= (ref($value)) ? &Storable::dclone($value)
+    $remembered{$remembered_id}= (ref($value)) ? &Storable::dclone($value)
                                     : $value;
     if ($to_remember<0) { return; }
-    $accessed{$id}=[&gettimeofday()];
+    $accessed{$remembered_id}=[&gettimeofday()];
     if (scalar(keys(%remembered)) <= $to_remember) { return; }
     my $to_kick;
     my $max_time=0;
@@ -2923,6 +3192,14 @@ sub can_edit_resource {
                         $forceedit = 1;
                     }
                     $cfile = $resurl;
+                } elsif ($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/exttools?$}) {
+                    $incourse = 1;
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                    $cfile = $resurl;
                 } elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
                     $incourse = 1;
                     if ($env{'form.forceedit'}) {
@@ -2947,6 +3224,14 @@ sub can_edit_resource {
                         $forceedit = 1;
                     }
                     $cfile = $resurl;
+            } elsif (($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/exttools?$}) && ($env{'form.folderpath'} =~ /^supplemental/)) {
+                $incourse = 1;
+                if ($env{'form.forceedit'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = $resurl;
             } elsif (($resurl eq '/adm/extresedit') && ($symb || $env{'form.folderpath'})) {
                 $incourse = 1;
                 $forceview = 1;
@@ -2956,8 +3241,13 @@ sub can_edit_resource {
                     $cfile = &clutter($res);
                 } else {
                     $cfile = $env{'form.suppurl'};
-                    $cfile =~ s{^http://}{};
-                    $cfile = '/adm/wrapper/ext/'.$cfile;
+                    my $escfile = &unescape($cfile);
+                    if ($escfile =~ m{^/adm/$cdom/$cnum/\d+/exttools?$}) {
+                        $cfile = '/adm/wrapper'.$escfile;
+                    } else {
+                        $escfile =~ s{^http://}{};
+                        $cfile = &escape("/adm/wrapper/ext/$escfile");
+                    }
                 }
             } elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
                 if ($env{'form.forceedit'}) {
@@ -3839,7 +4129,7 @@ sub flushcourselogs {
         }
     }
 #
-# Reverse lookup of domain roles (dc, ad, li, sc, au)
+# Reverse lookup of domain roles (dc, ad, li, sc, dh, da, au)
 #
     my %domrolebuffer = ();
     foreach my $entry (keys(%domainrolehash)) {
@@ -3854,10 +4144,19 @@ sub flushcourselogs {
         delete $domainrolehash{$entry};
     }
     foreach my $dom (keys(%domrolebuffer)) {
-	my %servers = &get_servers($dom,'library');
+	my %servers;
+	if (defined(&domain($dom,'primary'))) {
+	    my $primary=&domain($dom,'primary');
+	    my $hostname=&hostname($primary);
+	    $servers{$primary} = $hostname;
+	} else { 
+	    %servers = &get_servers($dom,'library');
+	}
 	foreach my $tryserver (keys(%servers)) {
-	    unless (&reply('domroleput:'.$dom.':'.
-			   $domrolebuffer{$dom},$tryserver) eq 'ok') {
+	    if (&reply('domroleput:'.$dom.':'.
+		       $domrolebuffer{$dom},$tryserver) eq 'ok') {
+		last;
+	    } else {  
 		&logthis('Put of domain roles failed for '.$dom.' and  '.$tryserver);
 	    }
         }
@@ -3977,7 +4276,7 @@ sub userrolelog {
          {$trole.':'.$username.':'.$domain.':'.$env{'user.name'}.':'.$env{'user.domain'}.':'}
                     =$tend.':'.$tstart;
     }
-    if ($trole =~ /^(dc|ad|li|au|dg|sc)/ ) {
+    if ($trole =~ /^(dc|ad|li|au|dg|sc|dh|da)/ ) {
        my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
        $domainrolehash
          {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
@@ -4204,6 +4503,195 @@ sub get_my_roles {
     return %returnhash;
 }
 
+sub get_all_adhocroles {
+    my ($dom) = @_;
+    my @roles_by_num = ();
+    my %domdefaults = &get_domain_defaults($dom);
+    my (%description,%access_in_dom,%access_info);
+    if (ref($domdefaults{'adhocroles'}) eq 'HASH') {
+        my $count = 0;
+        my %domcurrent = %{$domdefaults{'adhocroles'}};
+        my %ordered;
+        foreach my $role (sort(keys(%domcurrent))) {
+            my ($order,$desc,$access_in_dom);
+            if (ref($domcurrent{$role}) eq 'HASH') {
+                $order = $domcurrent{$role}{'order'};
+                $desc = $domcurrent{$role}{'desc'};
+                $access_in_dom{$role} = $domcurrent{$role}{'access'};
+                $access_info{$role} = $domcurrent{$role}{$access_in_dom{$role}};
+            }
+            if ($order eq '') {
+                $order = $count;
+            }
+            $ordered{$order} = $role;
+            if ($desc ne '') {
+                $description{$role} = $desc;
+            } else {
+                $description{$role}= $role;
+            }
+            $count++;
+        }
+        foreach my $item (sort {$a <=> $b } (keys(%ordered))) {
+            push(@roles_by_num,$ordered{$item});
+        }
+    }
+    return (\@roles_by_num,\%description,\%access_in_dom,\%access_info);
+}
+
+sub get_my_adhocroles {
+    my ($cid,$checkreg) = @_;
+    my ($cdom,$cnum,%info,@possroles,$description,$roles_by_num);
+    if ($env{'request.course.id'} eq $cid) {
+        $cdom = $env{'course.'.$cid.'.domain'};
+        $cnum = $env{'course.'.$cid.'.num'};
+        $info{'internal.coursecode'} = $env{'course.'.$cid.'.internal.coursecode'};
+    } elsif ($cid =~ /^($match_domain)_($match_courseid)$/) {
+        $cdom = $1;
+        $cnum = $2;
+        %info = &Apache::lonnet::get('environment',['internal.coursecode'],
+                                     $cdom,$cnum);
+    }
+    if (($info{'internal.coursecode'} ne '') && ($checkreg)) {
+        my $user = $env{'user.name'}.':'.$env{'user.domain'};
+        my %rosterhash = &get('classlist',[$user],$cdom,$cnum);
+        if ($rosterhash{$user} ne '') {
+            my $type = (split(/:/,$rosterhash{$user}))[5];
+            return ([],{}) if ($type eq 'auto');
+        }
+    }
+    if (($cdom ne '') && ($cnum ne ''))  {
+        if (($env{"user.role.dh./$cdom/"}) || ($env{"user.role.da./$cdom/"})) {
+            my $then=$env{'user.login.time'};
+            my $update=$env{'user.update.time'};
+            if (!$update) {
+                $update = $then;
+            }
+            my @liveroles;
+            foreach my $role ('dh','da') {
+                if ($env{"user.role.$role./$cdom/"}) {
+                    my ($tstart,$tend)=split(/\./,$env{"user.role.$role./$cdom/"});
+                    my $limit = $update;
+                    if ($env{'request.role'} eq "$role./$cdom/") {
+                        $limit = $then;
+                    }
+                    my $activerole = 1;
+                    if ($tstart && $tstart>$limit) { $activerole = 0; }
+                    if ($tend   && $tend  <$limit) { $activerole = 0; }
+                    if ($activerole) {
+                        push(@liveroles,$role);
+                    }
+                }
+            }
+            if (@liveroles) {
+                if (&homeserver($cnum,$cdom) ne 'no_host') {
+                    my ($accessref,$accessinfo,%access_in_dom);
+                    ($roles_by_num,$description,$accessref,$accessinfo) = &get_all_adhocroles($cdom);
+                    if (ref($roles_by_num) eq 'ARRAY') {
+                        if (@{$roles_by_num}) {
+                            my %settings;
+                            if ($env{'request.course.id'} eq $cid) {
+                                foreach my $envkey (keys(%env)) {
+                                    if ($envkey =~ /^\Qcourse.$cid.\E(internal\.adhoc.+)$/) {
+                                        $settings{$1} = $env{$envkey};
+                                    }
+                                }
+                            } else {
+                                %settings = &dump('environment',$cdom,$cnum,'internal\.adhoc');
+                            }
+                            my %setincrs;
+                            if ($settings{'internal.adhocaccess'}) {
+                                map { $setincrs{$_} = 1; } split(/,/,$settings{'internal.adhocaccess'});
+                            }
+                            my @statuses;
+                            if ($env{'environment.inststatus'}) {
+                                @statuses = split(/,/,$env{'environment.inststatus'});
+                            }
+                            my $user = $env{'user.name'}.':'.$env{'user.domain'};
+                            if (ref($accessref) eq 'HASH') {
+                                %access_in_dom = %{$accessref};
+                            }
+                            foreach my $role (@{$roles_by_num}) {
+                                my ($curraccess,@okstatus,@personnel);
+                                if ($setincrs{$role}) {
+                                    ($curraccess,my $rest) = split(/=/,$settings{'internal.adhoc.'.$role});
+                                    if ($curraccess eq 'status') {
+                                        @okstatus = split(/\&/,$rest);
+                                    } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                        @personnel = split(/\&/,$rest);
+                                    }
+                                } else {
+                                    $curraccess = $access_in_dom{$role};
+                                    if (ref($accessinfo) eq 'HASH') {
+                                        if ($curraccess eq 'status') {
+                                            if (ref($accessinfo->{$role}) eq 'ARRAY') {
+                                                @okstatus = @{$accessinfo->{$role}};
+                                            }
+                                        } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                            if (ref($accessinfo->{$role}) eq 'ARRAY') {
+                                                @personnel = @{$accessinfo->{$role}};
+                                            }
+                                        }
+                                    }
+                                }
+                                if ($curraccess eq 'none') {
+                                    next;
+                                } elsif ($curraccess eq 'all') {
+                                    push(@possroles,$role);
+                                } elsif ($curraccess eq 'dh') {
+                                    if (grep(/^dh$/,@liveroles)) {
+                                        push(@possroles,$role);
+                                    } else {
+                                        next;
+                                    }
+                                } elsif ($curraccess eq 'da') {
+                                    if (grep(/^da$/,@liveroles)) {
+                                        push(@possroles,$role);
+                                    } else {
+                                        next;
+                                    }
+                                } elsif ($curraccess eq 'status') {
+                                    if (@okstatus) {
+                                        if (!@statuses) {
+                                            if (grep(/^default$/,@okstatus)) {
+                                                push(@possroles,$role);
+                                            }
+                                        } else {
+                                            foreach my $status (@okstatus) {
+                                                if (grep(/^\Q$status\E$/,@statuses)) {
+                                                    push(@possroles,$role);
+                                                    last;
+                                                }
+                                            }
+                                        }
+                                    }
+                                } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                    if (grep(/^\Q$user\E$/,@personnel)) {
+                                        if ($curraccess eq 'exc') {
+                                            push(@possroles,$role);
+                                        }
+                                    } elsif ($curraccess eq 'inc') {
+                                        push(@possroles,$role);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    unless (ref($description) eq 'HASH') {
+        if (ref($roles_by_num) eq 'ARRAY') {
+            my %desc;
+            map { $desc{$_} = $_; } (@{$roles_by_num});
+            $description = \%desc;
+        } else {
+            $description = {};
+        }
+    }
+    return (\@possroles,$description);
+}
+
 # ----------------------------------------------------- Frontpage Announcements
 #
 #
@@ -4444,6 +4932,21 @@ sub get_domain_roles {
     return %personnel;
 }
 
+sub get_active_domroles {
+    my ($dom,$roles) = @_;
+    return () unless (ref($roles) eq 'ARRAY');
+    my $now = time;
+    my %dompersonnel = &get_domain_roles($dom,$roles,$now,$now);
+    my %domroles;
+    foreach my $server (keys(%dompersonnel)) {
+        foreach my $user (sort(keys(%{$dompersonnel{$server}}))) {
+            my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,$user);
+            $domroles{$uname.':'.$udom} = $dompersonnel{$server}{$user};
+        }
+    }
+    return %domroles;
+}
+
 # ----------------------------------------------------------- Interval timing 
 
 {
@@ -4458,9 +4961,10 @@ my %cachedtimes=();
 my $cachedtime='';
 
 sub load_all_first_access {
-    my ($uname,$udom)=@_;
+    my ($uname,$udom,$ignorecache)=@_;
     if (($cachedkey eq $uname.':'.$udom) &&
-        (abs($cachedtime-time)<5) && (!$env{'form.markaccess'})) {
+        (abs($cachedtime-time)<5) && (!$env{'form.markaccess'}) &&
+        (!$ignorecache)) {
         return;
     }
     $cachedtime=time;
@@ -4469,7 +4973,7 @@ sub load_all_first_access {
 }
 
 sub get_first_access {
-    my ($type,$argsymb,$argmap)=@_;
+    my ($type,$argsymb,$argmap,$ignorecache)=@_;
     my ($symb,$courseid,$udom,$uname)=&whichuser();
     if ($argsymb) { $symb=$argsymb; }
     my ($map,$id,$res)=&decode_symb($symb);
@@ -4481,7 +4985,7 @@ sub get_first_access {
     } else {
 	$res=$symb;
     }
-    &load_all_first_access($uname,$udom);
+    &load_all_first_access($uname,$udom,$ignorecache);
     return $cachedtimes{"$courseid\0$res"};
 }
 
@@ -5335,6 +5839,10 @@ sub custom_roleprivs {
                     $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
                 }
                 if (($trest ne '') && (defined($coursepriv))) {
+                    if ($trole =~ m{^cr/$tdomain/$tdomain\Q-domainconfig\E/([^/]+)$}) {
+                        my $rolename = $1;
+                        $coursepriv = &course_adhocrole_privs($rolename,$tdomain,$trest,$coursepriv);
+                    }
                     $$allroles{'cm.'.$area}.=':'.$coursepriv;
                     $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
                 }
@@ -5343,6 +5851,48 @@ sub custom_roleprivs {
     }
 }
 
+sub course_adhocrole_privs {
+    my ($rolename,$cdom,$cnum,$coursepriv) = @_;
+    my %overrides = &get('environment',["internal.adhocpriv.$rolename"],$cdom,$cnum);
+    if ($overrides{"internal.adhocpriv.$rolename"}) {
+        my (%currprivs,%storeprivs);
+        foreach my $item (split(/:/,$coursepriv)) {
+            my ($priv,$restrict) = split(/\&/,$item);
+            $currprivs{$priv} = $restrict;
+        }
+        my (%possadd,%possremove,%full);
+        foreach my $item (split(/\:/,$Apache::lonnet::pr{'cr:c'})) {
+            my ($priv,$restrict)=split(/\&/,$item);
+            $full{$priv} = $restrict;
+        }
+        foreach my $item (split(/,/,$overrides{"internal.adhocpriv.$rolename"})) {
+             next if ($item eq '');
+             my ($rule,$rest) = split(/=/,$item);
+             next unless (($rule eq 'off') || ($rule eq 'on'));
+             foreach my $priv (split(/:/,$rest)) {
+                 if ($priv ne '') {
+                     if ($rule eq 'off') {
+                         $possremove{$priv} = 1;
+                     } else {
+                         $possadd{$priv} = 1;
+                     }
+                 }
+             }
+         }
+         foreach my $priv (sort(keys(%full))) {
+             if (exists($currprivs{$priv})) {
+                 unless (exists($possremove{$priv})) {
+                     $storeprivs{$priv} = $currprivs{$priv};
+                 }
+             } elsif (exists($possadd{$priv})) {
+                 $storeprivs{$priv} = $full{$priv};
+             }
+         }
+         $coursepriv = ':'.join(':',map { $_.'&'.$storeprivs{$_}; } sort(keys(%storeprivs)));
+     }
+     return $coursepriv;
+}
+
 sub group_roleprivs {
     my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
     my $access = 1;
@@ -5555,39 +6105,56 @@ sub delete_env_groupprivs {
 }
 
 sub check_adhoc_privs {
-    my ($cdom,$cnum,$update,$refresh,$now,$checkrole,$caller) = @_;
+    my ($cdom,$cnum,$update,$refresh,$now,$checkrole,$caller,$sec) = @_;
     my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
+    if ($sec) {
+        $cckey .= '/'.$sec;
+    } 
     my $setprivs;
     if ($env{$cckey}) {
         my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
         &role_status($cckey,$update,$refresh,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
         unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
-            &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller);
+            &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller,$sec);
             $setprivs = 1;
         }
     } else {
-        &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller);
+        &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller,$sec);
         $setprivs = 1;
     }
     return $setprivs;
 }
 
 sub set_adhoc_privileges {
-# role can be cc or ca
-    my ($dcdom,$pickedcourse,$role,$caller) = @_;
+# role can be cc, ca, or cr/<dom>/<dom>-domainconfig/role
+    my ($dcdom,$pickedcourse,$role,$caller,$sec) = @_;
     my $area = '/'.$dcdom.'/'.$pickedcourse;
+    if ($sec ne '') {
+        $area .= '/'.$sec;
+    }
     my $spec = $role.'.'.$area;
     my %userroles = &set_arearole($role,$area,'','',$env{'user.domain'},
                                   $env{'user.name'},1);
-    my %ccrole = ();
-    &standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
-    my ($author,$adv)= &set_userprivs(\%userroles,\%ccrole);
+    my %rolehash = ();
+    if ($role =~ m{^\Qcr/$dcdom/$dcdom\E\-domainconfig/(\w+)$}) {
+        my $rolename = $1;
+        &custom_roleprivs(\%rolehash,$role,$dcdom,$pickedcourse,$spec,$area);
+        my %domdef = &get_domain_defaults($dcdom);
+        if (ref($domdef{'adhocroles'}) eq 'HASH') {
+            if (ref($domdef{'adhocroles'}{$rolename}) eq 'HASH') {
+                &appenv({'request.role.desc' => $domdef{'adhocroles'}{$rolename}{'desc'},});
+            }
+        }
+    } else {
+        &standard_roleprivs(\%rolehash,$role,$dcdom,$spec,$pickedcourse,$area);
+    }
+    my ($author,$adv)= &set_userprivs(\%userroles,\%rolehash);
     &appenv(\%userroles,[$role,'cm']);
     &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},"Role ".$role);
     unless ($caller eq 'constructaccess' && $env{'request.course.id'}) {
         &appenv( {'request.role'        => $spec,
                   'request.role.domain' => $dcdom,
-                  'request.course.sec'  => ''
+                  'request.course.sec'  => $sec,
                  }
                );
         my $tadv=0;
@@ -5971,9 +6538,11 @@ sub tmpget {
     if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
     my $rep=&reply("tmpget:$token",$server);
     my %returnhash;
+    if ($rep =~ /^(con_lost|error|no_such_host)/i) {
+        return %returnhash;
+    }
     foreach my $item (split(/\&/,$rep)) {
 	my ($key,$value)=split(/=/,$item);
-        next if ($key =~ /^error: 2 /);
 	$returnhash{&unescape($key)}=&thaw_unescape($value);
     }
     return %returnhash;
@@ -6355,6 +6924,7 @@ sub usertools_access {
                       unofficial => 1,
                       community  => 1,
                       textbook   => 1,
+                      placement  => 1,
                  );
     } elsif ($context eq 'requestauthor') {
         %tools = (
@@ -7088,7 +7658,7 @@ sub allowed {
        my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
        if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
 	   =~/\Q$rolecode\E/) {
-	   if (($priv ne 'pch') && ($priv ne 'plc')) { 
+	   if (($priv ne 'pch') && ($priv ne 'plc') && ($priv ne 'pac')) {
 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
 			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
 			$env{'request.course.id'});
@@ -7098,7 +7668,7 @@ sub allowed {
 
        if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
 	   =~/\Q$unamedom\E/) {
-	   if (($priv ne 'pch') && ($priv ne 'plc')) { 
+	   if (($priv ne 'pch') && ($priv ne 'plc') && ($priv ne 'pac')) {
 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
 			'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
 			$env{'request.course.id'});
@@ -7156,7 +7726,7 @@ sub constructaccess {
     my ($ownername,$ownerdomain,$ownerhome);
 
     ($ownerdomain,$ownername) =
-        ($url=~ m{^(?:\Q$perlvar{'lonDocRoot'}\E|)/priv/($match_domain)/($match_username)/});
+        ($url=~ m{^(?:\Q$perlvar{'lonDocRoot'}\E|)(?:/daxepage|/daxeopen)?/priv/($match_domain)/($match_username)(?:/|$)});
 
 # The URL does not really point to any authorspace, forget it
     unless (($ownername) && ($ownerdomain)) { return ''; }
@@ -7177,6 +7747,15 @@ sub constructaccess {
             $ownerhome = &homeserver($ownername,$ownerdomain);
             return ($ownername,$ownerdomain,$ownerhome);
         }
+        if ($env{'request.course.id'}) {
+            if (($ownername eq $env{'course.'.$env{'request.course.id'}.'.num'}) &&
+                ($ownerdomain eq $env{'course.'.$env{'request.course.id'}.'.domain'})) {
+                if (&allowed('mdc',$env{'request.course.id'})) {
+                    $ownerhome = $env{'course.'.$env{'request.course.id'}.'.home'};
+                    return ($ownername,$ownerdomain,$ownerhome);
+                }
+            }
+        }
     }
 
 # We don't have any access right now. If we are not possibly going to do anything about this,
@@ -7329,7 +7908,8 @@ sub get_commblock_resources {
                             }
                         }
                     }
-                    if ($interval[0] =~ /^\d+$/) {
+                    if ($interval[0] =~ /^(\d+)/) {
+                        my $timelimit = $1; 
                         my $first_access;
                         if ($type eq 'resource') {
                             $first_access=&get_first_access($interval[1],$item);
@@ -7339,7 +7919,7 @@ sub get_commblock_resources {
                             $first_access=&get_first_access($interval[1]);
                         }
                         if ($first_access) {
-                            my $timesup = $first_access+$interval[0];
+                            my $timesup = $first_access+$timelimit;
                             if ($timesup > $now) {
                                 my $activeblock;
                                 foreach my $res (@to_test) {
@@ -7494,7 +8074,7 @@ sub get_symb_from_alias {
 
 sub definerole {
   if (allowed('mcr','/')) {
-    my ($rolename,$sysrole,$domrole,$courole)=@_;
+    my ($rolename,$sysrole,$domrole,$courole,$uname,$udom)=@_;
     foreach my $role (split(':',$sysrole)) {
 	my ($crole,$cqual)=split(/\&/,$role);
         if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
@@ -7522,11 +8102,19 @@ sub definerole {
             }
         }
     }
+    my $uhome;
+    if (($uname ne '') && ($udom ne '')) {
+        $uhome = &homeserver($uname,$udom);
+        return $uhome if ($uhome eq 'no_host');
+    } else {
+        $uname = $env{'user.name'};
+        $udom = $env{'user.domain'};
+        $uhome = $env{'user.home'};
+    }
     my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
-                "$env{'user.domain'}:$env{'user.name'}:".
-	        "rolesdef_$rolename=".
+                "$udom:$uname:rolesdef_$rolename=".
                 escape($sysrole.'_'.$domrole.'_'.$courole);
-    return reply($command,$env{'user.home'});
+    return reply($command,$uhome);
   } else {
     return 'refused';
   }
@@ -7608,10 +8196,12 @@ sub update_allusers_table {
 
 sub fetch_enrollment_query {
     my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
-    my $homeserver;
+    my ($homeserver,$sleep,$loopmax);
     my $maxtries = 1;
     if ($context eq 'automated') {
         $homeserver = $perlvar{'lonHostID'};
+        $sleep = 2;
+        $loopmax = 100;
         $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
     } else {
         $homeserver = &homeserver($cnum,$dom);
@@ -7629,17 +8219,17 @@ sub fetch_enrollment_query {
         &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum); 
         return 'error: '.$queryid;
     }
-    my $reply = &get_query_reply($queryid);
+    my $reply = &get_query_reply($queryid,$sleep,$loopmax);
     my $tries = 1;
     while (($reply=~/^timeout/) && ($tries < $maxtries)) {
-        $reply = &get_query_reply($queryid);
+        $reply = &get_query_reply($queryid,$sleep,$loopmax);
         $tries ++;
     }
     if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
         &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
     } else {
         my @responses = split(/:/,$reply);
-        if ($homeserver eq $perlvar{'lonHostID'}) {
+        if (grep { $_ eq $homeserver } &current_machine_ids()) {
             foreach my $line (@responses) {
                 my ($key,$value) = split(/=/,$line,2);
                 $$replyref{$key} = $value;
@@ -7674,11 +8264,17 @@ sub fetch_enrollment_query {
 }
 
 sub get_query_reply {
-    my $queryid=shift;
+    my ($queryid,$sleep,$loopmax) = @_;;
+    if (($sleep eq '') || ($sleep !~ /^\d+\.?\d*$/)) {
+        $sleep = 0.2;
+    }
+    if (($loopmax eq '') || ($loopmax =~ /\D/)) {
+        $loopmax = 100;
+    }
     my $replyfile=LONCAPA::tempdir().$queryid;
     my $reply='';
-    for (1..100) {
-	sleep(0.2);
+    for (1..$loopmax) {
+	sleep($sleep);
         if (-e $replyfile.'.end') {
 	    if (open(my $fh,$replyfile)) {
 		$reply = join('',<$fh>);
@@ -8101,6 +8697,33 @@ sub auto_crsreq_update {
     return \%crsreqresponse;
 }
 
+sub auto_export_grades {
+    my ($cdom,$cnum,$inforef,$gradesref) = @_;
+    my ($homeserver,%exportresponse);
+    if ($cdom =~ /^$match_domain$/) {
+        $homeserver = &domain($cdom,'primary');
+    }
+    unless (($homeserver eq 'no_host') || ($homeserver eq '')) {
+        my $info;
+        if (ref($inforef) eq 'HASH') {
+            $info = &freeze_escape($inforef);
+        }
+        if (ref($gradesref) eq 'HASH') {
+            my $grades = &freeze_escape($gradesref);
+            my $response=&reply('encrypt:autoexportgrades:'.$cdom.':'.$cnum.':'.
+                                $info.':'.$grades,$homeserver);
+            unless ($response =~ /(con_lost|error|no_such_host|refused|unknown_command)/) {
+                my @items = split(/&/,$response);
+                foreach my $item (@items) {
+                    my ($key,$value) = split('=',$item);
+                    $exportresponse{&unescape($key)} = &thaw_unescape($value);
+                }
+            }
+        }
+    }
+    return \%exportresponse;
+}
+
 sub check_instcode_cloning {
     my ($codedefaults,$code_order,$cloner,$clonefromcode,$clonetocode) = @_;
     unless ((ref($codedefaults) eq 'HASH') && (ref($code_order) eq 'ARRAY')) {
@@ -8322,6 +8945,7 @@ sub plaintext {
     my %rolenames = (
                       Course    => 'std',
                       Community => 'alt1',
+                      Placement => 'std',
                     );
     if ($cid ne '') {
         if ($env{'course.'.$cid.'.'.$short.'.plaintext'} ne '') {
@@ -8539,7 +9163,8 @@ sub assignrole {
             &courserolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
                            $selfenroll,$context);
         } elsif (($role eq 'li') || ($role eq 'dg') || ($role eq 'sc') ||
-                 ($role eq 'au') || ($role eq 'dc')) {
+                 ($role eq 'au') || ($role eq 'dc') || ($role eq 'dh') ||
+                 ($role eq 'da')) {
             &domainrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
                            $context);
         } elsif (($role eq 'ca') || ($role eq 'aa')) {
@@ -8734,7 +9359,7 @@ sub modifyuser {
                   'current user id "'.$uidhash{$uname}.'".';
           }
        } else {
-	  &idput($udom,($uname => $uid));
+	  &idput($udom,{$uname => $uid},$uhome,'ids');
        }
     }
 # -------------------------------------------------------------- Add names, etc
@@ -8844,7 +9469,7 @@ sub modifyuser {
 sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
         $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid,
-        $selfenroll,$context,$inststatus,$credits)=@_;
+        $selfenroll,$context,$inststatus,$credits,$instsec)=@_;
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
 	    return 'not_in_class';
@@ -8860,13 +9485,13 @@ sub modifystudent {
     $uid = undef if (!$forceid);
     $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
                                         $gene,$usec,$end,$start,$type,$locktype,
-                                        $cid,$selfenroll,$context,$credits);
+                                        $cid,$selfenroll,$context,$credits,$instsec);
     return $reply;
 }
 
 sub modify_student_enrollment {
     my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
-        $locktype,$cid,$selfenroll,$context,$credits) = @_;
+        $locktype,$cid,$selfenroll,$context,$credits,$instsec) = @_;
     my ($cdom,$cnum,$chome);
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
@@ -8913,7 +9538,7 @@ sub modify_student_enrollment {
     my %old_entry = &Apache::lonnet::get('classlist',[$user],$cdom,$cnum);
     my $reply=cput('classlist',
 		   {$user => 
-			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype,$credits) },
+			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype,$credits,$instsec) },
 		   $cdom,$cnum);
     if (($reply eq 'ok') || ($reply eq 'delayed')) {
         &devalidate_getsection_cache($udom,$uname,$cid);
@@ -9899,7 +10524,24 @@ sub dirlist {
             foreach my $user (sort(keys(%allusers))) {
                 push(@alluserslist,$user.'&user');
             }
-            return (\@alluserslist);
+
+            if (!%listerror) {
+                # no errors
+                return (\@alluserslist);
+            } elsif (scalar(keys(%servers)) == 1) {
+                # one library server, one error 
+                my ($key) = keys(%listerror);
+                return (\@alluserslist, $listerror{$key});
+            } elsif ( grep { $_ eq 'con_lost' } values(%listerror) ) {
+                # con_lost indicates that we might miss data from at least one
+                # library server
+                return (\@alluserslist, 'con_lost');
+            } else {
+                # multiple library servers and no con_lost -> data should be
+                # complete. 
+                return (\@alluserslist);
+            }
+
         } else {
             return ([],'missing username');
         }
@@ -9972,6 +10614,115 @@ sub stat_file {
     return ();
 }
 
+# --------------------------------------------------------- recursedirs
+# Recursive function to traverse either a specific user's Authoring Space
+# or corresponding Published Resource Space, and populate the hash ref:
+# $dirhashref with URLs of all directories, and if $filehashref hash
+# ref arg is provided, the URLs of any files, excluding versioned, .meta,
+# or .rights files in resource space, and .meta, .save, .log, and .bak
+# files in Authoring Space.
+#
+# Inputs:
+#
+# $is_home - true if current server is home server for user's space
+# $context - either: priv, or res respectively for Authoring or Resource Space.
+# $docroot - Document root (i.e., /home/httpd/html
+# $toppath - Top level directory (i.e., /res/$dom/$uname or /priv/$dom/$uname
+# $relpath - Current path (relative to top level).
+# $dirhashref - reference to hash to populate with URLs of directories (Required)
+# $filehashref - reference to hash to populate with URLs of files (Optional)
+#
+# Returns: nothing
+#
+# Side Effects: populates $dirhashref, and $filehashref (if provided).
+#
+# Currently used by interface/londocs.pm to create linked select boxes for
+# directory and filename to import a Course "Author" resource into a course, and
+# also to create linked select boxes for Authoring Space and Directory to choose
+# save location for creation of a new "standard" problem from the Course Editor.
+#
+
+sub recursedirs {
+    my ($is_home,$context,$docroot,$toppath,$relpath,$dirhashref,$filehashref) = @_;
+    return unless (ref($dirhashref) eq 'HASH');
+    my $currpath = $docroot.$toppath;
+    if ($relpath) {
+        $currpath .= "/$relpath";
+    }
+    my $savefile;
+    if (ref($filehashref)) {
+        $savefile = 1;
+    }
+    if ($is_home) {
+        if (opendir(my $dirh,$currpath)) {
+            foreach my $item (sort { lc($a) cmp lc($b) } grep(!/^\.+$/,readdir($dirh))) {
+                next if ($item eq '');
+                if (-d "$currpath/$item") {
+                    my $newpath;
+                    if ($relpath) {
+                        $newpath = "$relpath/$item";
+                    } else {
+                        $newpath = $item;
+                    }
+                    $dirhashref->{&Apache::lonlocal::js_escape($newpath)} = 1;
+                    &recursedirs($is_home,$context,$docroot,$toppath,$newpath,$dirhashref,$filehashref);
+                } elsif ($savefile) {
+                    if ($context eq 'priv') {
+                        unless ($item =~ /\.(meta|save|log|bak|DS_Store)$/) {
+                            $filehashref->{&Apache::lonlocal::js_escape($relpath)}{$item} = 1;
+                        }
+                    } else {
+                        unless (($item =~ /\.meta$/) || ($item =~ /\.\d+\.\w+$/) || ($item =~ /\.rights$/)) {
+                            $filehashref->{&Apache::lonlocal::js_escape($relpath)}{$item} = 1;
+                        }
+                    }
+                }
+            }
+            closedir($dirh);
+        }
+    } else {
+        my ($dirlistref,$listerror) =
+            &dirlist($toppath.$relpath);
+        my @dir_lines;
+        my $dirptr=16384;
+        if (ref($dirlistref) eq 'ARRAY') {
+            foreach my $dir_line (sort
+                              {
+                                  my ($afile)=split('&',$a,2);
+                                  my ($bfile)=split('&',$b,2);
+                                  return (lc($afile) cmp lc($bfile));
+                              } (@{$dirlistref})) {
+                my ($item,$dom,undef,$testdir,undef,undef,undef,undef,$size,undef,$mtime,undef,undef,undef,$obs,undef) =
+                    split(/\&/,$dir_line,16);
+                $item =~ s/\s+$//;
+                next if (($item =~ /^\.\.?$/) || ($obs));
+                if ($dirptr&$testdir) {
+                    my $newpath;
+                    if ($relpath) {
+                        $newpath = "$relpath/$item";
+                    } else {
+                        $relpath = '/';
+                        $newpath = $item;
+                    }
+                    $dirhashref->{&Apache::lonlocal::js_escape($newpath)} = 1;
+                    &recursedirs($is_home,$context,$docroot,$toppath,$newpath,$dirhashref,$filehashref);
+                } elsif ($savefile) {
+                    if ($context eq 'priv') {
+                        unless ($item =~ /\.(meta|save|log|bak|DS_Store)$/) {
+                            $filehashref->{$relpath}{$item} = 1;
+                        }
+                    } else {
+                        unless (($item =~ /\.meta$/) || ($item =~ /\.\d+\.\w+$/)) {
+                            $filehashref->{$relpath}{$item} = 1;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return;
+}
+
 # -------------------------------------------------------- Value of a Condition
 
 # gets the value of a specific preevaluated condition
@@ -10116,10 +10867,12 @@ sub get_userresdata {
     }
     #error 2 occurs when the .db doesn't exist
     if ($tmp!~/error: 2 /) {
-	&logthis("<font color=\"blue\">WARNING:".
-		 " Trying to get resource data for ".
-		 $uname." at ".$udom.": ".
-		 $tmp."</font>");
+        if ((!defined($cached)) || ($tmp ne 'con_lost')) {
+	    &logthis("<font color=\"blue\">WARNING:".
+		     " Trying to get resource data for ".
+		     $uname." at ".$udom.": ".
+		     $tmp."</font>");
+        }
     } elsif ($tmp=~/error: 2 /) {
 	#&EXT_cache_set($udom,$uname);
 	&do_cache_new('userres',$hashid,undef,600);
@@ -10133,7 +10886,14 @@ sub get_userresdata {
 #  Parameters:
 #     $name      - Course/user name.
 #     $domain    - Name of the domain the user/course is registered on.
-#     $type      - Type of thing $name is (must be 'course' or 'user'
+#     $type      - Type of thing $name is (must be 'course' or 'user')
+#     $mapp      - decluttered URL of enclosing map  
+#     $recursed  - Ref to scalar -- set to 1, if nested maps have been recursed.
+#     $recurseup - Ref to array of map URLs, starting with map containing
+#                  $mapp up through hierarchy of nested maps to top level map.  
+#     $courseid  - CourseID (first part of param identifier).
+#     $modifier  - Middle part of param identifier.
+#     $what      - Last part of param identifier.
 #     @which     - Array of names of resources desired.
 #  Returns:
 #     The value of the first reasource in @which that is found in the
@@ -10143,7 +10903,8 @@ sub get_userresdata {
 #     'user', an undefined  reference is returned.
 #     If none of the resources are found, an undef is returned
 sub resdata {
-    my ($name,$domain,$type,@which)=@_;
+    my ($name,$domain,$type,$mapp,$recursed,$recurseup,$courseid,
+        $modifier,$what,@which)=@_;
     my $result;
     if ($type eq 'course') {
 	$result=&get_courseresdata($name,$domain);
@@ -10152,13 +10913,46 @@ sub resdata {
     }
     if (!ref($result)) { return $result; }    
     foreach my $item (@which) {
-	if (defined($result->{$item->[0]})) {
+        if ($item->[1] eq 'course') {
+            if ((ref($recurseup) eq 'ARRAY') && (ref($recursed) eq 'SCALAR')) {
+                unless ($$recursed) {
+                    @{$recurseup} = &get_map_hierarchy($mapp,$courseid);
+                    $$recursed = 1;
+                }
+                foreach my $item (@${recurseup}) {
+                    my $norecursechk=$courseid.$modifier.$item.'___(all).'.$what;
+                    last if (defined($result->{$norecursechk}));
+                    my $recursechk=$courseid.$modifier.$item.'___(rec).'.$what;
+                    if (defined($result->{$recursechk})) { return [$result->{$recursechk},'map']; }
+                }
+            }
+        }
+        if (defined($result->{$item->[0]})) {
 	    return [$result->{$item->[0]},$item->[1]];
 	}
     }
     return undef;
 }
 
+sub get_domain_ltitools {
+    my ($cdom) = @_;
+    my %ltitools;
+    my ($result,$cached)=&is_cached_new('ltitools',$cdom);
+    if (defined($cached)) {
+        if (ref($result) eq 'HASH') {
+            %ltitools = %{$result};
+        }
+    } else {
+        my %domconfig = &get_dom('configuration',['ltitools'],$cdom);
+        if (ref($domconfig{'ltitools'}) eq 'HASH') {
+            %ltitools = %{$domconfig{'ltitools'}};
+        }
+        my $cachetime = 24*60*60;
+        &do_cache_new('ltitools',$cdom,\%ltitools,$cachetime);
+    }
+    return %ltitools;
+}
+
 sub get_numsuppfiles {
     my ($cnum,$cdom,$ignorecache)=@_;
     my $hashid=$cnum.':'.$cdom;
@@ -10183,6 +10977,16 @@ sub get_numsuppfiles {
 # EXT resource caching routines
 #
 
+{
+# Cache (5 seconds) of map hierarchy for speedup of navmaps display
+#
+# The course for which we cache
+my $cachedmapkey='';
+# The cached recursive maps for this course
+my %cachedmaps=();
+# When this was last done
+my $cachedmaptime='';
+
 sub clear_EXT_cache_status {
     &delenv('cache.EXT.');
 }
@@ -10360,8 +11164,8 @@ sub EXT {
             }
         }
 
-	my ($section, $group, @groups);
-	my ($courselevelm,$courselevel);
+	my ($section, $group, @groups, @recurseup, $recursed);
+	my ($courselevelm,$courseleveli,$courselevel,$mapp);
         if (($courseid eq '') && ($cid)) {
             $courseid = $cid;
         }
@@ -10372,11 +11176,10 @@ sub EXT {
 
 # ----------------------------------------------------- Cascading lookup scheme
 	    my $symbp=$symbparm;
-	    my $mapp=&deversion((&decode_symb($symbp))[0]);
-
+	    $mapp=&deversion((&decode_symb($symbp))[0]);
 	    my $symbparm=$symbp.'.'.$spacequalifierrest;
+            my $recurseparm=$mapp.'___(rec).'.$spacequalifierrest;
 	    my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
-
 	    if (($env{'user.name'} eq $uname) &&
 		($env{'user.domain'} eq $udom)) {
 		$section=$env{'request.course.sec'};
@@ -10393,17 +11196,21 @@ sub EXT {
 
 	    my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
 	    my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
+            my $secleveli=$courseid.'.['.$section.'].'.$recurseparm;
 	    my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
 
 	    $courselevel=$courseid.'.'.$spacequalifierrest;
 	    my $courselevelr=$courseid.'.'.$symbparm;
+            $courseleveli=$courseid.'.'.$recurseparm;
 	    $courselevelm=$courseid.'.'.$mapparm;
 
 # ----------------------------------------------------------- first, check user
 
-	    my $userreply=&resdata($uname,$udom,'user',
+	    my $userreply=&resdata($uname,$udom,'user',$mapp,\$recursed,
+                                   \@recurseup,$courseid,'.',$spacequalifierrest, 
 				       ([$courselevelr,'resource'],
 					[$courselevelm,'map'     ],
+                                        [$courseleveli,'map'     ],
 					[$courselevel, 'course'  ]));
 	    if (defined($userreply)) { return &get_reply($userreply); }
 
@@ -10411,15 +11218,18 @@ sub EXT {
             my $coursereply;
             if (@groups > 0) {
                 $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
-                                       $mapparm,$spacequalifierrest);
-                if (defined($coursereply)) { return &get_reply($coursereply); }
+                                       $recurseparm,$mapparm,$spacequalifierrest,
+                                       $mapp,\$recursed,\@recurseup);
+                if (defined($coursereply)) { return &get_reply($coursereply); } 
             }
 
 	    $coursereply=&resdata($env{'course.'.$courseid.'.num'},
 				  $env{'course.'.$courseid.'.domain'},
-				  'course',
+				  'course',$mapp,\$recursed,\@recurseup,
+                                  $courseid,'.['.$section.'].',$spacequalifierrest,
 				  ([$seclevelr,   'resource'],
 				   [$seclevelm,   'map'     ],
+                                   [$secleveli,   'map'     ],
 				   [$seclevel,    'course'  ],
 				   [$courselevelr,'resource']));
 	    if (defined($coursereply)) { return &get_reply($coursereply); }
@@ -10436,8 +11246,9 @@ sub EXT {
 	    if ($thisparm) { return &get_reply([$thisparm,'resource']); }
 	}
 # ------------------------------------------ fourth, look in resource metadata
-
-	$spacequalifierrest=~s/\./\_/;
+ 
+        my $what = $spacequalifierrest;
+	$what=~s/\./\_/;
 	my $filename;
 	if (!$symbparm) { $symbparm=&symbread(); }
 	if ($symbparm) {
@@ -10445,18 +11256,20 @@ sub EXT {
 	} else {
 	    $filename=$env{'request.filename'};
 	}
-	my $metadata=&metadata($filename,$spacequalifierrest);
+	my $metadata=&metadata($filename,$what);
 	if (defined($metadata)) { return &get_reply([$metadata,'resource']); }
-	$metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
+	$metadata=&metadata($filename,'parameter_'.$what);
 	if (defined($metadata)) { return &get_reply([$metadata,'resource']); }
 
-# ---------------------------------------------- fourth, look in rest of course
+# ----------------------------------------------- fifth, look in rest of course
 	if ($symbparm && defined($courseid) && 
 	    $courseid eq $env{'request.course.id'}) {
 	    my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
 				     $env{'course.'.$courseid.'.domain'},
-				     'course',
+				     'course',$mapp,\$recursed,\@recurseup,
+                                     $courseid,'.',$spacequalifierrest,
 				     ([$courselevelm,'map'   ],
+                                      [$courseleveli,'map'   ],
 				      [$courselevel, 'course']));
 	    if (defined($coursereply)) { return &get_reply($coursereply); }
 	}
@@ -10513,22 +11326,51 @@ sub get_reply {
 }
 
 sub check_group_parms {
-    my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
-    my @groupitems = ();
-    my $resultitem;
-    my @levels = ([$symbparm,'resource'],[$mapparm,'map'],[$what,'course']);
+    my ($courseid,$groups,$symbparm,$recurseparm,$mapparm,$what,$mapp,
+        $recursed,$recurseupref) = @_;
+    my @levels = ([$symbparm,'resource'],[$mapparm,'map'],[$recurseparm,'map'],
+                  [$what,'course']);
+    my $coursereply;
     foreach my $group (@{$groups}) {
+        my @groupitems = ();
         foreach my $level (@levels) {
              my $item = $courseid.'.['.$group.'].'.$level->[0];
              push(@groupitems,[$item,$level->[1]]);
         }
+        my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
+                                   $env{'course.'.$courseid.'.domain'},
+                                   'course',$mapp,$recursed,$recurseupref,
+                                   $courseid,'.['.$group.'].',$what,
+                                   @groupitems);
+        last if (defined($coursereply));
     }
-    my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
-                            $env{'course.'.$courseid.'.domain'},
-                                     'course',@groupitems);
     return $coursereply;
 }
 
+sub get_map_hierarchy {
+    my ($mapname,$courseid) = @_;
+    my @recurseup = ();
+    if ($mapname) {
+        if (($cachedmapkey eq $courseid) &&
+            (abs($cachedmaptime-time)<5)) {
+            if (ref($cachedmaps{$mapname}) eq 'ARRAY') {
+                return @{$cachedmaps{$mapname}};
+            }
+        }
+        my $navmap = Apache::lonnavmaps::navmap->new();
+        if (ref($navmap)) {
+            @recurseup = $navmap->recurseup_maps($mapname);
+            undef($navmap);
+            $cachedmaps{$mapname} = \@recurseup;
+            $cachedmaptime=time;
+            $cachedmapkey=$courseid;
+        }
+    }
+    return @recurseup;
+}
+
+}
+
 sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
     my ($courseid,@groups) = @_;
     @groups = sort(@groups);
@@ -10613,7 +11455,7 @@ sub metadata {
     # if it is a non metadata possible uri return quickly
     if (($uri eq '') || 
 	(($uri =~ m|^/*adm/|) && 
-	     ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard)$})) ||
+	     ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard|exttools?)$})) ||
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ m{^/*uploaded/.+\.sequence$})) {
 	return undef;
     }
@@ -12146,6 +12988,8 @@ sub clutter {
 #		&logthis("Got a blank emb style");
 	    }
 	}
+    } elsif ($thisfn =~ m{^/adm/$match_domain/$match_courseid/\d+/exttools?$}) {
+        $thisfn='/adm/wrapper'.$thisfn;
     }
     return $thisfn;
 }
@@ -12337,8 +13181,8 @@ sub fetch_dns_checksums {
     }
 
     sub load_domain_tab {
-	my ($ignore_cache) = @_;
-	&get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache);
+	my ($ignore_cache,$nocache) = @_;
+	&get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache,$nocache);
 	my $fh;
 	if (open($fh,"<".$perlvar{'lonTabDir'}.'/domain.tab')) {
 	    my @lines = <$fh>;
@@ -12424,8 +13268,8 @@ sub fetch_dns_checksums {
     }
 
     sub load_hosts_tab {
-	my ($ignore_cache) = @_;
-	&get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache);
+	my ($ignore_cache,$nocache) = @_;
+	&get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache,$nocache);
 	open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
 	my @config = <$config>;
 	&parse_hosts_tab(\@config);
@@ -12447,7 +13291,8 @@ sub fetch_dns_checksums {
     }
 
     sub all_names {
-	&load_hosts_tab() if (!$loaded);
+        my ($ignore_cache,$nocache) = @_;
+	&load_hosts_tab($ignore_cache,$nocache) if (!$loaded);
 
 	return %name_to_host;
     }
@@ -12569,7 +13414,7 @@ sub fetch_dns_checksums {
     }
     
     sub get_iphost {
-	my ($ignore_cache) = @_;
+	my ($ignore_cache,$nocache) = @_;
 
 	if (!$ignore_cache) {
 	    if (%iphost) {
@@ -12593,7 +13438,7 @@ sub fetch_dns_checksums {
 	    %old_name_to_ip = %{$ip_info->[1]};
 	}
 
-	my %name_to_host = &all_names();
+	my %name_to_host = &all_names($ignore_cache,$nocache);
 	foreach my $name (keys(%name_to_host)) {
 	    my $ip;
 	    if (!exists($name_to_ip{$name})) {
@@ -12618,9 +13463,11 @@ sub fetch_dns_checksums {
 	    }
 	    push(@{$iphost{$ip}},@{$name_to_host{$name}});
 	}
-	&do_cache_new('iphost','iphost',
-		      [\%iphost,\%name_to_ip,\%lonid_to_ip],
-		      48*60*60);
+        unless ($nocache) {
+	    &do_cache_new('iphost','iphost',
+		          [\%iphost,\%name_to_ip,\%lonid_to_ip],
+		          48*60*60);
+        }
 
 	return %iphost;
     }
@@ -12812,10 +13659,17 @@ BEGIN {
                 my $name = $token->[2]{'name'};
                 my $value = $token->[2]{'value'};
                 my $valuematch = $token->[2]{'valuematch'};
-                if ($item ne '' && $name ne '' && ($value ne '' || $valuematch ne '')) {
+                my $namematch = $token->[2]{'namematch'};
+                if ($item eq 'parameter') {
+                    if (($namematch ne '') || (($name ne '') && ($value ne '' || $valuematch ne ''))) {
+                        my $release = $parser->get_text();
+                        $release =~ s/(^\s*|\s*$ )//gx;
+                        $needsrelease{$item.':'.$name.':'.$value.':'.$valuematch.':'.$namematch} = $release;
+                    }
+                } elsif ($item ne '' && $name ne '') {
                     my $release = $parser->get_text();
                     $release =~ s/(^\s*|\s*$ )//gx;
-                    $needsrelease{$item.':'.$name.':'.$value.':'.$valuematch} = $release;
+                    $needsrelease{$item.':'.$name.':'.$value} = $release;
                 }
             }
         }
@@ -13085,10 +13939,12 @@ the answer, and also caches if there is
 
 =item *
 X<idget()>
-B<idget($udom,@ids)>: find the usernames behind a list of IDs
-(IDs are a unique resource in a domain, there must be only 1 ID per
-username, and only 1 username per ID in a specific domain) (returns
-hash: id=>name,id=>name)
+B<idget($udom,$idsref,$namespace)>: find the usernames behind either 
+a list of student/employee IDs or clicker IDs
+(student/employee IDs are a unique resource in a domain, there must be 
+only 1 ID per username, and only 1 username per ID in a specific domain).
+clickerIDs are not necessarily unique, as students might share clickers.
+(returns hash: id=>name,id=>name)
 
 =item *
 X<idrget()>
@@ -13097,7 +13953,27 @@ usernames (returns hash: name=>id,name=>
 
 =item *
 X<idput()>
-B<idput($udom,%ids)>: store away a list of names and associated IDs
+B<idput($udom,$idsref,$uhome,$namespace)>: store away a list of 
+names and associated student/employee IDs or clicker IDs.
+
+=item *
+X<iddel()>
+B<iddel($udom,$idshashref,$uhome,$namespace)>: delete unwanted 
+student/employee ID or clicker ID username look-ups from domain.
+The homeserver ($uhome) and namespace ($namespace) are optional.
+If no $uhome is provided, it will be determined usig &homeserver()
+for each user.  If no $namespace is provided, the default is ids.
+
+=item *
+X<updateclickers()>
+B<updateclickers($udom,$action,$idshashref,$uhome,$critical)>: update 
+clicker ID-to-username look-ups in clickers.db on library server.
+Permitted actions are add or del (i.e., add or delete). The 
+clickers.db contains clickerID as keys (escaped), and each corresponding
+value is an escaped comma-separated list of usernames (for whom the
+library server is the homeserver), who registered that particular ID.
+If $critical is true, the update will be sent via &critical, otherwise
+&reply() will be used.
 
 =item *
 X<rolesinit()>
@@ -13179,9 +14055,10 @@ in which case the null string is returne
 
 =item *
 
-definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
-role rolename set privileges in format of lonTabs/roles.tab for system, domain,
-and course level
+definerole($rolename,$sysrole,$domrole,$courole,$uname,$udom) : define role;
+define a custom role rolename set privileges in format of lonTabs/roles.tab
+for system, domain, and course level. $uname and $udom are optional (current
+user's username and domain will be used when either of $uname or $udom are absent.
 
 =item *
 
@@ -13385,6 +14262,8 @@ Inputs:
 
 =item $credits, number of credits student will earn from this class
 
+=item $instsec, institutional course section code for student
+
 =back
 
 
@@ -13853,7 +14732,7 @@ requestcourses: ability to request cours
 =over
 
 =item
-official, unofficial, community, textbook
+official, unofficial, community, textbook, placement
 
 =back
 
@@ -13875,7 +14754,7 @@ for course's uploaded content.
 
 =item
 canuse_pdfforms, officialcredits, unofficialcredits, textbookcredits, officialquota, unofficialquota, 
-communityquota, textbookquota
+communityquota, textbookquota, placementquota
 
 =back