--- loncom/lonnet/perl/lonnet.pm	2013/08/04 03:00:12	1.1172.2.30
+++ loncom/lonnet/perl/lonnet.pm	2016/08/25 08:09:34	1.1318
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1172.2.30 2013/08/04 03:00:12 raeburn Exp $
+# $Id: lonnet.pm,v 1.1318 2016/08/25 08:09:34 droeschl Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -75,7 +75,10 @@ use LWP::UserAgent();
 use HTTP::Date;
 use Image::Magick;
 
-use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir $apache
+
+use Encode;
+
+use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir
             $_64bit %env %protocol %loncaparevs %serverhomeIDs %needsrelease
             %managerstab);
 
@@ -89,7 +92,7 @@ use GDBM_File;
 use HTML::LCParser;
 use Fcntl qw(:flock);
 use Storable qw(thaw nfreeze);
-use Time::HiRes qw( gettimeofday tv_interval );
+use Time::HiRes qw( sleep gettimeofday tv_interval );
 use Cache::Memcached;
 use Digest::MD5;
 use Math::Random;
@@ -102,13 +105,14 @@ use LONCAPA::Lond;
 use File::Copy;
 
 my $readit;
-my $max_connection_retries = 10;     # Or some such value.
+my $max_connection_retries = 20;     # Or some such value.
 
 require Exporter;
 
 our @ISA = qw (Exporter);
 our @EXPORT = qw(%env);
 
+
 # ------------------------------------ Logging (parameters, docs, slots, roles)
 {
     my $logid;
@@ -123,19 +127,19 @@ our @EXPORT = qw(%env);
 	$logid ++;
         my $now = time();
 	my $id=$now.'00000'.$$.'00000'.$logid;
-        my $logentry = {
-                         $id => {
-                                  'exe_uname' => $env{'user.name'},
-                                  'exe_udom'  => $env{'user.domain'},
-                                  'exe_time'  => $now,
-                                  'exe_ip'    => $ENV{'REMOTE_ADDR'},
-                                  'delflag'   => $delflag,
-                                  'logentry'  => $storehash,
-                                  'uname'     => $uname,
-                                  'udom'      => $udom,
-                                }
+        my $logentry = { 
+                          $id => {
+                                   'exe_uname' => $env{'user.name'},
+                                   'exe_udom'  => $env{'user.domain'},
+                                   'exe_time'  => $now,
+                                   'exe_ip'    => $ENV{'REMOTE_ADDR'},
+                                   'delflag'   => $delflag,
+                                   'logentry'  => $storehash,
+                                   'uname'     => $uname,
+                                   'udom'      => $udom,
+                                  }
                        };
-        return &put('nohist_'.$hash_name,$logentry,$cdom,$cnum);
+	return &put('nohist_'.$hash_name,$logentry,$cdom,$cnum);
     }
 }
 
@@ -225,6 +229,46 @@ 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 ($distro =~ /^(?:centos|redhat|scientific)(\d+)$/) {
+            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)) {
@@ -352,8 +396,11 @@ sub get_remote_globals {
 }
 
 sub remote_devalidate_cache {
-    my ($lonhost,$name,$id) = @_;
-    my $response = &reply('devalidatecache:'.&escape($name).':'.&escape($id),$lonhost);
+    my ($lonhost,$cachekeys) = @_;
+    my $items;
+    return unless (ref($cachekeys) eq 'ARRAY');
+    my $cachestr = join('&',@{$cachekeys});
+    my $response = &reply('devalidatecache:'.&escape($cachestr),$lonhost);
     return $response;
 }
 
@@ -368,7 +415,7 @@ sub subreply {
 
     my $lockfile=$peerfile.".lock";
     while (-e $lockfile) {	# Need to wait for the lockfile to disappear.
-	sleep(1);
+	sleep(0.1);
     }
     # At this point, either a loncnew parent is listening or an old lonc
     # or loncnew child is listening so we can connect or everything's dead.
@@ -386,7 +433,7 @@ sub subreply {
 	} else {
 	    &create_connection(&hostname($server),$server);
 	}
-        sleep(1);		# Try again later if failed connection.
+        sleep(0.1);	# Try again later if failed connection.
     }
     my $answer;
     if ($client) {
@@ -415,8 +462,8 @@ 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)");
@@ -441,7 +488,7 @@ 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>");
@@ -462,7 +509,7 @@ 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 $now=time;
@@ -479,7 +526,7 @@ sub critical {
 		    close($dfh);
 		}
             }
-            sleep 2;
+            sleep 1;
             my $wcmd='';
             {
 		my $dfh;
@@ -599,7 +646,7 @@ sub transfer_profile_to_env {
 
 # ---------------------------------------------------- Check for valid session 
 sub check_for_valid_session {
-    my ($r,$name) = @_;
+    my ($r,$name,$userhashref) = @_;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
     if ($name eq '') {
         $name = 'lonID';
@@ -631,12 +678,9 @@ sub check_for_valid_session {
 	return undef;
     }
 
-    if (($r->user() eq '') && ($apache >= 2.4)) {
-        if ($disk_env{'user.domain'} eq $r->dir_config('lonDefDomain')) {
-            $r->user($disk_env{'user.name'});
-        } else {
-            $r->user($disk_env{'user.name'}.':'.$disk_env{'user.domain'});
-        }
+    if (ref($userhashref) eq 'HASH') {
+        $userhashref->{'name'} = $disk_env{'user.name'};
+        $userhashref->{'domain'} = $disk_env{'user.domain'};
     }
 
     return $handle;
@@ -672,7 +716,7 @@ sub appenv {
 	    if (($key =~ /^user\.role/) || ($key =~ /^user\.priv/)) {
                 $refused = 1;
                 if (ref($roles) eq 'ARRAY') {
-                    my ($type,$role) = ($key =~ /^user\.(role|priv)\.([^.]+)\./);
+                    my ($type,$role) = ($key =~ m{^user\.(role|priv)\.(.+?)\./});
                     if (grep(/^\Q$role\E$/,@{$roles})) {
                         $refused = 0;
                     }
@@ -845,10 +889,8 @@ sub spareserver {
     if (ref($spareshash) eq 'HASH') {
         if (ref($spareshash->{'primary'}) eq 'ARRAY') {
             foreach my $try_server (@{ $spareshash->{'primary'} }) {
-                if ($uint_dom) {
-                    next unless (&spare_can_host($udom,$uint_dom,$remotesessions,
-                                                 $try_server));
-                }
+                next unless (&spare_can_host($udom,$uint_dom,$remotesessions,
+                                             $try_server));
 	        ($spare_server, $lowest_load) =
 	            &compare_server_load($try_server, $spare_server, $lowest_load);
             }
@@ -859,10 +901,8 @@ sub spareserver {
         if (!$found_server) {
             if (ref($spareshash->{'default'}) eq 'ARRAY') { 
 	        foreach my $try_server (@{ $spareshash->{'default'} }) {
-                    if ($uint_dom) {
-                        next unless (&spare_can_host($udom,$uint_dom,
-                                                     $remotesessions,$try_server));
-                    }
+                    next unless (&spare_can_host($udom,$uint_dom,
+                                                 $remotesessions,$try_server));
 	            ($spare_server, $lowest_load) =
 		        &compare_server_load($try_server, $spare_server, $lowest_load);
                 }
@@ -886,7 +926,17 @@ sub spareserver {
 }
 
 sub compare_server_load {
-    my ($try_server, $spare_server, $lowest_load) = @_;
+    my ($try_server, $spare_server, $lowest_load, $required) = @_;
+
+    if ($required) {
+        my ($reqdmajor,$reqdminor) = ($required =~ /^(\d+)\.(\d+)$/);
+        my $remoterev = &get_server_loncaparev(undef,$try_server);
+        my ($major,$minor) = ($remoterev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+        if (($major eq '' && $minor eq '') ||
+            (($reqdmajor > $major) || (($reqdmajor == $major) && ($reqdminor > $minor)))) {
+            return ($spare_server,$lowest_load);
+        }
+    }
 
     my $loadans     = &reply('load',    $try_server);
     my $userloadans = &reply('userload',$try_server);
@@ -947,26 +997,43 @@ sub has_user_session {
 # --------- determine least loaded server in a user's domain which allows login
 
 sub choose_server {
-    my ($udom,$checkloginvia) = @_;
+    my ($udom,$checkloginvia,$required,$skiploadbal) = @_;
     my %domconfhash = &Apache::loncommon::get_domainconf($udom);
     my %servers = &get_servers($udom);
     my $lowest_load = 30000;
-    my ($login_host,$hostname,$portal_path,$isredirect);
+    my ($login_host,$hostname,$portal_path,$isredirect,$balancers);
+    if ($skiploadbal) {
+        ($balancers,my $cached)=&is_cached_new('loadbalancing',$udom);
+        unless (defined($cached)) {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &Apache::lonnet::get_dom('configuration',['loadbalancing'],$udom);
+            if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
+                $balancers = &do_cache_new('loadbalancing',$udom,$domconfig{'loadbalancing'},
+                                           $cachetime);
+            }
+        }
+    }
     foreach my $lonhost (keys(%servers)) {
+        if ($skiploadbal) {
+            if (ref($balancers) eq 'HASH') {
+                next if (exists($balancers->{$lonhost}));
+            }
+        }   
         my $loginvia;
         if ($checkloginvia) {
             $loginvia = $domconfhash{$udom.'.login.loginvia_'.$lonhost};
             if ($loginvia) {
                 my ($server,$path) = split(/:/,$loginvia);
                 ($login_host, $lowest_load) =
-                    &compare_server_load($server, $login_host, $lowest_load);
+                    &compare_server_load($server, $login_host, $lowest_load, $required);
                 if ($login_host eq $server) {
                     $portal_path = $path;
                     $isredirect = 1;
                 }
             } else {
                 ($login_host, $lowest_load) =
-                    &compare_server_load($lonhost, $login_host, $lowest_load);
+                    &compare_server_load($lonhost, $login_host, $lowest_load, $required);
                 if ($login_host eq $lonhost) {
                     $portal_path = '';
                     $isredirect = ''; 
@@ -974,7 +1041,7 @@ sub choose_server {
             }
         } else {
             ($login_host, $lowest_load) =
-                &compare_server_load($lonhost, $login_host, $lowest_load);
+                &compare_server_load($lonhost, $login_host, $lowest_load, $required);
         }
     }
     if ($login_host ne '') {
@@ -1147,19 +1214,27 @@ sub can_host_session {
 sub spare_can_host {
     my ($udom,$uint_dom,$remotesessions,$try_server)=@_;
     my $canhost=1;
-    my @intdoms;
-    my $internet_names = &Apache::lonnet::get_internet_names($try_server);
-    if (ref($internet_names) eq 'ARRAY') {
-        @intdoms = @{$internet_names};
-    }
-    unless (grep(/^\Q$uint_dom\E$/,@intdoms)) {
-        my $serverhomeID = &Apache::lonnet::get_server_homeID($try_server);
-        my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
-        my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
-        my $remoterev = &Apache::lonnet::get_server_loncaparev(undef,$try_server);
-        $canhost = &can_host_session($udom,$try_server,$remoterev,
-                                     $remotesessions,
-                                     $defdomdefaults{'hostedsessions'});
+    my $try_server_hostname = &hostname($try_server);
+    my $serverhomeID = &get_server_homeID($try_server_hostname);
+    my $serverhomedom = &host_domain($serverhomeID);
+    my %defdomdefaults = &get_domain_defaults($serverhomedom);
+    if (ref($defdomdefaults{'offloadnow'}) eq 'HASH') {
+        if ($defdomdefaults{'offloadnow'}{$try_server}) {
+            $canhost = 0;
+        }
+    }
+    if (($canhost) && ($uint_dom)) {
+        my @intdoms;
+        my $internet_names = &get_internet_names($try_server);
+        if (ref($internet_names) eq 'ARRAY') {
+            @intdoms = @{$internet_names};
+        }
+        unless (grep(/^\Q$uint_dom\E$/,@intdoms)) {
+            my $remoterev = &get_server_loncaparev(undef,$try_server);
+            $canhost = &can_host_session($udom,$try_server,$remoterev,
+                                         $remotesessions,
+                                         $defdomdefaults{'hostedsessions'});
+        }
     }
     return $canhost;
 }
@@ -1253,7 +1328,7 @@ 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 $intdom)) {
@@ -1268,10 +1343,12 @@ sub check_loadbalancing {
             &Apache::lonnet::get_dom('configuration',['loadbalancing'],$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') {
-        ($is_balancer,$currtargets,$currrules) =
+        ($is_balancer,$currtargets,$currrules) = 
             &check_balancer_result($result,@hosts);
         if ($is_balancer) {
             if (ref($currrules) eq 'HASH') {
@@ -1321,16 +1398,18 @@ sub check_loadbalancing {
             }
         }
     } elsif (($homeintdom) && ($udom ne $serverhomedom)) {
-        my ($result,$cached)=&is_cached_new('loadbalancing',$serverhomedom);
+        ($result,$cached)=&is_cached_new('loadbalancing',$serverhomedom);
         unless (defined($cached)) {
             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') {
-            ($is_balancer,$currtargets,$currrules) =
+            ($is_balancer,$currtargets,$currrules) = 
                 &check_balancer_result($result,@hosts);
             if ($is_balancer) {
                 if (ref($currrules) eq 'HASH') {
@@ -1346,12 +1425,21 @@ 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;
@@ -1386,8 +1474,8 @@ sub check_loadbalancing {
             $is_balancer = 0;
             if ($uname ne '' && $udom ne '') {
                 if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
-
-                    &appenv({'user.loadbalexempt'     => $lonhost,
+                    
+                    &appenv({'user.loadbalexempt'     => $lonhost,  
                              'user.loadbalcheck.time' => time});
                 }
             }
@@ -1516,17 +1604,33 @@ 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);
@@ -1534,10 +1638,10 @@ 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;
 }
 
@@ -1552,60 +1656,141 @@ 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) = @_;
@@ -1621,6 +1806,7 @@ sub dump_dom {
 
 sub get_dom {
     my ($namespace,$storearr,$udom,$uhome)=@_;
+    return if ($udom eq 'public');
     my $items='';
     foreach my $item (@$storearr) {
         $items.=&escape($item).'&';
@@ -1628,6 +1814,7 @@ sub get_dom {
     $items=~s/\&$//;
     if (!$udom) {
         $udom=$env{'user.domain'};
+        return if ($udom eq 'public');
         if (defined(&domain($udom,'primary'))) {
             $uhome=&domain($udom,'primary');
         } else {
@@ -1731,14 +1918,13 @@ sub retrieve_inst_usertypes {
     my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
     if ((ref($domdefs{'inststatustypes'}) eq 'HASH') && 
         (ref($domdefs{'inststatusorder'}) eq 'ARRAY')) {
-        %returnhash = %{$domdefs{'inststatustypes'}};
-        @order = @{$domdefs{'inststatusorder'}};
+        return ($domdefs{'inststatustypes'},$domdefs{'inststatusorder'});
     } else {
         if (defined(&domain($udom,'primary'))) {
             my $uhome=&domain($udom,'primary');
             my $rep=&reply("inst_usertypes:$udom",$uhome);
             if ($rep =~ /^(con_lost|error|no_such_host|refused)/) {
-                &logthis("get_dom failed - $rep returned from $uhome in domain: $udom");
+                &logthis("retrieve_inst_usertypes failed - $rep returned from $uhome in domain: $udom");
                 return (\%returnhash,\@order);
             }
             my ($hashitems,$orderitems) = split(/:/,$rep); 
@@ -1754,15 +1940,15 @@ sub retrieve_inst_usertypes {
                 push(@order,&unescape($item));
             }
         } else {
-            &logthis("get_dom failed - no primary domain server for $udom");
+            &logthis("retrieve_inst_usertypes failed - no primary domain server for $udom");
         }
+        return (\%returnhash,\@order);
     }
-    return (\%returnhash,\@order);
 }
 
 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($1) ne '') {
             return '1';
         }
@@ -1903,6 +2089,63 @@ sub get_instuser {
     return ($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;
@@ -1982,12 +2225,15 @@ sub inst_userrules {
 # ------------- Get Authentication, Language and User Tools Defaults for Domain
 
 sub get_domain_defaults {
-    my ($domain) = @_;
+    my ($domain,$ignore_cache) = @_;
+    return if (($domain eq '') || ($domain eq 'public'));
     my $cachetime = 60*60*24;
-    my ($result,$cached)=&is_cached_new('domdefaults',$domain);
-    if (defined($cached)) {
-        if (ref($result) eq 'HASH') {
-            return %{$result};
+    unless ($ignore_cache) {
+        my ($result,$cached)=&is_cached_new('domdefaults',$domain);
+        if (defined($cached)) {
+            if (ref($result) eq 'HASH') {
+                return %{$result};
+            }
         }
     }
     my %domdefaults;
@@ -1995,7 +2241,9 @@ sub get_domain_defaults {
          &Apache::lonnet::get_dom('configuration',['defaults','quotas',
                                   'requestcourses','inststatus',
                                   'coursedefaults','usersessions',
-                                  'requestauthor'],$domain);
+                                  'requestauthor','selfenrollment',
+                                  'coursecategories','ssl','autoenroll'],$domain);
+    my @coursetypes = ('official','unofficial','community','textbook','placement');
     if (ref($domconfig{'defaults'}) eq 'HASH') {
         $domdefaults{'lang_def'} = $domconfig{'defaults'}{'lang_def'}; 
         $domdefaults{'auth_def'} = $domconfig{'defaults'}{'auth_def'};
@@ -2025,7 +2273,7 @@ sub get_domain_defaults {
         }
     }
     if (ref($domconfig{'requestcourses'}) eq 'HASH') {
-        foreach my $item ('official','unofficial','community') {
+        foreach my $item ('official','unofficial','community','textbook','placement') {
             $domdefaults{$item} = $domconfig{'requestcourses'}{$item};
         }
     }
@@ -2033,19 +2281,42 @@ sub get_domain_defaults {
         $domdefaults{'requestauthor'} = $domconfig{'requestauthor'};
     }
     if (ref($domconfig{'inststatus'}) eq 'HASH') {
-        foreach my $item ('inststatustypes','inststatusorder') {
+        foreach my $item ('inststatustypes','inststatusorder','inststatusguest') {
             $domdefaults{$item} = $domconfig{'inststatus'}{$item};
         }
     }
     if (ref($domconfig{'coursedefaults'}) eq 'HASH') {
-        if (ref($domconfig{'coursedefaults'}{'coursecredits'}) eq 'HASH') {
-            $domdefaults{'officialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'official'};
-            $domdefaults{'unofficialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'unofficial'};
-        }
-        if (ref($domconfig{'coursedefaults'}{'uploadquota'}) eq 'HASH') {
-            $domdefaults{'officialquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'official'};
-            $domdefaults{'unofficialquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'unofficial'};
-            $domdefaults{'communityquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'community'};
+        $domdefaults{'canuse_pdfforms'} = $domconfig{'coursedefaults'}{'canuse_pdfforms'};
+        $domdefaults{'usejsme'} = $domconfig{'coursedefaults'}{'usejsme'};
+        $domdefaults{'uselcmath'} = $domconfig{'coursedefaults'}{'uselcmath'};
+        if (ref($domconfig{'coursedefaults'}{'postsubmit'}) eq 'HASH') {
+            $domdefaults{'postsubmit'} = $domconfig{'coursedefaults'}{'postsubmit'}{'client'};
+        }
+        foreach my $type (@coursetypes) {
+            if (ref($domconfig{'coursedefaults'}{'coursecredits'}) eq 'HASH') {
+                unless ($type eq 'community') {
+                    $domdefaults{$type.'credits'} = $domconfig{'coursedefaults'}{'coursecredits'}{$type};
+                }
+            }
+            if (ref($domconfig{'coursedefaults'}{'uploadquota'}) eq 'HASH') {
+                $domdefaults{$type.'quota'} = $domconfig{'coursedefaults'}{'uploadquota'}{$type};
+            }
+            if ($domdefaults{'postsubmit'} eq 'on') {
+                if (ref($domconfig{'coursedefaults'}{'postsubmit'}{'timeout'}) eq 'HASH') {
+                    $domdefaults{$type.'postsubtimeout'} = 
+                        $domconfig{'coursedefaults'}{'postsubmit'}{'timeout'}{$type}; 
+                }
+            }
+        }
+        if (ref($domconfig{'coursedefaults'}{'canclone'}) eq 'HASH') {
+            if (ref($domconfig{'coursedefaults'}{'canclone'}{'instcode'}) eq 'ARRAY') {
+                my @clonecodes = @{$domconfig{'coursedefaults'}{'canclone'}{'instcode'}};
+                if (@clonecodes) {
+                    $domdefaults{'canclone'} = join('+',@clonecodes);
+                }
+            }
+        } elsif ($domconfig{'coursedefaults'}{'canclone'}) {
+            $domdefaults{'canclone'}=$domconfig{'coursedefaults'}{'canclone'};
         }
     }
     if (ref($domconfig{'usersessions'}) eq 'HASH') {
@@ -2055,11 +2326,79 @@ sub get_domain_defaults {
         if (ref($domconfig{'usersessions'}{'hosted'}) eq 'HASH') {
             $domdefaults{'hostedsessions'} = $domconfig{'usersessions'}{'hosted'};
         }
+        if (ref($domconfig{'usersessions'}{'offloadnow'}) eq 'HASH') {
+            $domdefaults{'offloadnow'} = $domconfig{'usersessions'}{'offloadnow'};
+        }
+    }
+    if (ref($domconfig{'selfenrollment'}) eq 'HASH') {
+        if (ref($domconfig{'selfenrollment'}{'admin'}) eq 'HASH') {
+            my @settings = ('types','registered','enroll_dates','access_dates','section',
+                            'approval','limit');
+            foreach my $type (@coursetypes) {
+                if (ref($domconfig{'selfenrollment'}{'admin'}{$type}) eq 'HASH') {
+                    my @mgrdc = ();
+                    foreach my $item (@settings) {
+                        if ($domconfig{'selfenrollment'}{'admin'}{$type}{$item} eq '0') {
+                            push(@mgrdc,$item);
+                        }
+                    }
+                    if (@mgrdc) {
+                        $domdefaults{$type.'selfenrolladmdc'} = join(',',@mgrdc);
+                    }
+                }
+            }
+        }
+        if (ref($domconfig{'selfenrollment'}{'default'}) eq 'HASH') {
+            foreach my $type (@coursetypes) {
+                if (ref($domconfig{'selfenrollment'}{'default'}{$type}) eq 'HASH') {
+                    foreach my $item (keys(%{$domconfig{'selfenrollment'}{'default'}{$type}})) {
+                        $domdefaults{$type.'selfenroll'.$item} = $domconfig{'selfenrollment'}{'default'}{$type}{$item};
+                    }
+                }
+            }
+        }
+    }
+    if (ref($domconfig{'coursecategories'}) eq 'HASH') {
+        $domdefaults{'catauth'} = 'std';
+        $domdefaults{'catunauth'} = 'std';
+        if ($domconfig{'coursecategories'}{'auth'}) { 
+            $domdefaults{'catauth'} = $domconfig{'coursecategories'}{'auth'};
+        }
+        if ($domconfig{'coursecategories'}{'unauth'}) {
+            $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{'autoenroll'}) eq 'HASH') {
+        $domdefaults{'autofailsafe'} = $domconfig{'autoenroll'}{'autofailsafe'};
     }
     &do_cache_new('domdefaults',$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 {
@@ -2646,17 +2985,25 @@ sub ssi {
     &Apache::lonenc::check_encrypt(\$fn);
     if (%form) {
       $request=new HTTP::Request('POST',&absolute_url().$fn);
-      $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys(%form)));
+      $request->content(join('&',map { 
+            my $name = escape($_);
+            "$name=" . ( ref($form{$_}) eq 'ARRAY' 
+            ? join("&$name=", map {escape($_) } @{$form{$_}}) 
+            : &escape($form{$_}) );    
+        } keys(%form)));
     } else {
       $request=new HTTP::Request('GET',&absolute_url().$fn);
     }
 
     $request->header(Cookie => $ENV{'HTTP_COOKIE'});
     my $response= $ua->request($request);
+    my $content = $response->content;
+
+
     if (wantarray) {
-	return ($response->content, $response);
+	return ($content, $response);
     } else {
-	return $response->content;
+	return $content;
     }
 }
 
@@ -2688,7 +3035,7 @@ sub allowuploaded {
 #
 # Determine if the current user should be able to edit a particular resource,
 # when viewing in course context.
-# (a) When viewing resource used to determine if "Edit" item is included in
+# (a) When viewing resource used to determine if "Edit" item is included in 
 #     Functions.
 # (b) When displaying folder contents in course editor, used to determine if
 #     "Edit" link will be displayed alongside resource.
@@ -2696,12 +3043,12 @@ sub allowuploaded {
 #  input: six args -- filename (decluttered), course number, course domain,
 #                   url, symb (if registered) and group (if this is a group
 #                   item -- e.g., bulletin board, group page etc.).
-#  output: array of five scalars --
+#  output: array of five scalars -- 
 #          $cfile -- url for file editing if editable on current server
 #          $home -- homeserver of resource (i.e., for author if published,
 #                                           or course if uploaded.).
 #          $switchserver --  1 if server switch will be needed.
-#          $forceedit -- 1 if icon/link should be to go to edit mode
+#          $forceedit -- 1 if icon/link should be to go to edit mode 
 #          $forceview -- 1 if icon/link should be to go to view mode
 #
 
@@ -2790,7 +3137,7 @@ sub can_edit_resource {
                     $forceedit = 1;
                 }
                 $cfile = $resurl;
-            } elsif (($resurl ne '') && (&is_on_map($resurl))) {
+            } elsif (($resurl ne '') && (&is_on_map($resurl))) { 
                 if ($resurl =~ m{^/adm/$match_domain/$match_username/\d+/smppg|bulletinboard$}) {
                     $incourse = 1;
                     if ($env{'form.forceedit'}) {
@@ -2810,6 +3157,14 @@ 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'}) {
@@ -2821,7 +3176,7 @@ sub can_edit_resource {
                 }
             } elsif ($resurl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
                 my $template = '/res/lib/templates/simpleproblem.problem';
-                if (&is_on_map($template)) {
+                if (&is_on_map($template)) { 
                     $incourse = 1;
                     $forceview = 1;
                     $cfile = $template;
@@ -2834,6 +3189,14 @@ 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;
@@ -2843,9 +3206,21 @@ 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'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = ($resurl =~ m{^/} ? $resurl : "/$resurl");
             }
         }
         if ($uploaded || $incourse) {
@@ -2861,7 +3236,7 @@ sub can_edit_resource {
                 $cfile=$file;
             }
         }
-        if (($cfile ne '') && (!$incourse || $uploaded) &&
+        if (($cfile ne '') && (!$incourse || $uploaded) && 
             (($home ne '') && ($home ne 'no_host'))) {
             my @ids=&current_machine_ids();
             unless (grep(/^\Q$home\E$/,@ids)) {
@@ -2888,9 +3263,9 @@ sub in_course {
     if ($hideprivileged) {
         my $skipuser;
         my %coursehash = &coursedescription($cdom.'_'.$cnum);
-        my @possdoms = ($cdom);
-        if ($coursehash{'checkforpriv'}) {
-            push(@possdoms,split(/,/,$coursehash{'checkforpriv'}));
+        my @possdoms = ($cdom);  
+        if ($coursehash{'checkforpriv'}) { 
+            push(@possdoms,split(/,/,$coursehash{'checkforpriv'})); 
         }
         if (&privileged($uname,$udom,\@possdoms)) {
             $skipuser = 1;
@@ -3394,7 +3769,7 @@ sub extract_embedded_items {
 	    }
 	    if (lc($tagname) eq 'a') {
                 unless (($attr->{'href'} =~ /^#/) || ($attr->{'href'} eq '')) {
-		    &add_filetype($allfiles,$attr->{'href'},'href');
+                    &add_filetype($allfiles,$attr->{'href'},'href');
                 }
 	    }
             if (lc($tagname) eq 'script') {
@@ -3483,8 +3858,26 @@ sub extract_embedded_items {
                     }
                 }
 	    }
+            if (lc($tagname) eq 'iframe') {
+                my $src = $attr->{'src'} ;
+                if (($src ne '') && ($src !~ m{^(/|https?://)})) {
+                    &add_filetype($allfiles,$src,'src');
+                } elsif ($src =~ m{^/}) {
+                    if ($env{'request.course.id'}) {
+                        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                        my $url = &hreflocation('',$fullpath);
+                        if ($url =~ m{^/uploaded/$cdom/$cnum/docs/(\w+/\d+)/}) {
+                            my $relpath = $1;
+                            if ($src =~ m{^/uploaded/$cdom/$cnum/docs/\Q$relpath\E/(.+)$}) {
+                                &add_filetype($allfiles,$1,'src');
+                            }
+                        }
+                    }
+                }
+            }
             if ($t->[4] =~ m{/>$}) {
-                pop(@state);  
+                pop(@state);
             }
 	} elsif ($t->[0] eq 'E') {
 	    my ($tagname) = ($t->[1]);
@@ -4047,7 +4440,7 @@ sub get_my_roles {
             } else {
                 my $possdoms = [$domain];
                 if (ref($roledoms) eq 'ARRAY') {
-                   push(@{$possdoms},@{$roledoms});
+                   push(@{$possdoms},@{$roledoms}); 
                 }
                 if (&privileged($username,$domain,$possdoms,\@privroles)) {
                     if (!$nothide{$username.':'.$domain}) {
@@ -4141,7 +4534,8 @@ sub courseiddump {
     my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,
         $coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok,
         $selfenrollonly,$catfilter,$showhidden,$caller,$cloner,$cc_clone,
-        $cloneonly,$createdbefore,$createdafter,$creationcontext,$domcloner)=@_;
+        $cloneonly,$createdbefore,$createdafter,$creationcontext,$domcloner,
+        $hasuniquecode,$reqcrsdom,$reqinstcode)=@_;
     my $as_hash = 1;
     my %returnhash;
     if (!$domfilter) { $domfilter=''; }
@@ -4154,17 +4548,18 @@ sub courseiddump {
 	    if (($domfilter eq '') ||
 		(&host_domain($tryserver) eq $domfilter)) {
                 my $rep;
-                if (grep { $_ eq $tryserver } &current_machine_ids()) {
-                    $rep = &LONCAPA::Lond::dump_course_id_handler(
-                        join(":", (&host_domain($tryserver), $sincefilter,
-                                &escape($descfilter), &escape($instcodefilter),
+                if (grep { $_ eq $tryserver } current_machine_ids()) {
+                    $rep = LONCAPA::Lond::dump_course_id_handler(
+                        join(":", (&host_domain($tryserver), $sincefilter, 
+                                &escape($descfilter), &escape($instcodefilter), 
                                 &escape($ownerfilter), &escape($coursefilter),
-                                &escape($typefilter), &escape($regexp_ok),
-                                $as_hash, &escape($selfenrollonly),
-                                &escape($catfilter), $showhidden, $caller,
-                                &escape($cloner), &escape($cc_clone), $cloneonly,
-                                &escape($createdbefore), &escape($createdafter),
-                                &escape($creationcontext), $domcloner)));
+                                &escape($typefilter), &escape($regexp_ok), 
+                                $as_hash, &escape($selfenrollonly), 
+                                &escape($catfilter), $showhidden, $caller, 
+                                &escape($cloner), &escape($cc_clone), $cloneonly, 
+                                &escape($createdbefore), &escape($createdafter), 
+                                &escape($creationcontext),$domcloner,$hasuniquecode,
+                                $reqcrsdom,&escape($reqinstcode))));
                 } else {
                     $rep = &reply('courseiddump:'.&host_domain($tryserver).':'.
                              $sincefilter.':'.&escape($descfilter).':'.
@@ -4175,10 +4570,10 @@ sub courseiddump {
                              $showhidden.':'.$caller.':'.&escape($cloner).':'.
                              &escape($cc_clone).':'.$cloneonly.':'.
                              &escape($createdbefore).':'.&escape($createdafter).':'.
-                             &escape($creationcontext).':'.$domcloner,
-                             $tryserver);
+                             &escape($creationcontext).':'.$domcloner.':'.$hasuniquecode.
+                             ':'.$reqcrsdom.':'.&escape($reqinstcode),$tryserver);
                 }
-
+                     
                 my @pairs=split(/\&/,$rep);
                 foreach my $item (@pairs) {
                     my ($key,$value)=split(/\=/,$item,2);
@@ -4315,12 +4710,13 @@ my $cachedkey='';
 # The cached times for this user
 my %cachedtimes=();
 # When this was last done
-my $cachedtime=();
+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;
@@ -4329,7 +4725,7 @@ 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);
@@ -4341,7 +4737,7 @@ 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"};
 }
 
@@ -4377,6 +4773,7 @@ sub set_first_access {
     return 'already_set';
 }
 }
+
 # --------------------------------------------- Set Expire Date for Spreadsheet
 
 sub expirespread {
@@ -4747,7 +5144,7 @@ sub tmprestore {
 # ----------------------------------------------------------------------- Store
 
 sub store {
-    my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
+    my ($storehash,$symb,$namespace,$domain,$stuname,$laststore) = @_;
     my $home='';
 
     if ($stuname) { $home=&homeserver($stuname,$domain); }
@@ -4777,13 +5174,13 @@ sub store {
     }
     $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
-    return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
+    return reply("store:$domain:$stuname:$namespace:$symb:$namevalue:$laststore","$home");
 }
 
 # -------------------------------------------------------------- Critical Store
 
 sub cstore {
-    my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
+    my ($storehash,$symb,$namespace,$domain,$stuname,$laststore) = @_;
     my $home='';
 
     if ($stuname) { $home=&homeserver($stuname,$domain); }
@@ -4814,7 +5211,7 @@ sub cstore {
     $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
     return critical
-                ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
+                ("store:$domain:$stuname:$namespace:$symb:$namevalue:$laststore","$home");
 }
 
 # --------------------------------------------------------------------- Restore
@@ -4970,7 +5367,7 @@ sub privileged {
     my $now = time;
     my $roles;
     if (ref($possroles) eq 'ARRAY') {
-        $roles = $possroles;
+        $roles = $possroles; 
     } else {
         $roles = ['dc','su'];
     }
@@ -4994,10 +5391,10 @@ sub privileged {
         my %rolesdump = &dump("roles", $domain, $username) or return 0;
         my $now = time;
 
-        for my $role (@rolesdump{grep { ! /^rolesdef_/ } keys %rolesdump}) {
+        for my $role (@rolesdump{grep { ! /^rolesdef_/ } keys(%rolesdump)}) {
             my ($trole, $tend, $tstart) = split(/_/, $role);
             if (grep(/^\Q$trole\E$/,@{$roles})) {
-                return 1 unless ($tend && $tend < $now)
+                return 1 unless ($tend && $tend < $now) 
                         or ($tstart && $tstart > $now);
             }
         }
@@ -5035,7 +5432,7 @@ sub privileged_by_domain {
                         my ($trole,$uname,$udom,$rest) = split(/:/,$item,4);
                         my ($end,$start) = split(/:/,$dompersonnel{$server}{$item});
                         next if ($end && $end < $now);
-                        $privileged{$dom}{$trole}{$uname.':'.$udom} =
+                        $privileged{$dom}{$trole}{$uname.':'.$udom} = 
                             $dompersonnel{$server}{$item};
                     }
                 }
@@ -5083,7 +5480,7 @@ sub rolesinit {
     my %allroles=();
     my %allgroups=();
 
-    for my $area (grep { ! /^rolesdef_/ } keys %rolesdump) {
+    for my $area (grep { ! /^rolesdef_/ } keys(%rolesdump)) {
         my $role = $rolesdump{$area};
         $area =~ s/\_\w\w$//;
 
@@ -5175,7 +5572,7 @@ sub set_arearole {
 sub custom_roleprivs {
     my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
     my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
-    my $homsvr=homeserver($rauthor,$rdomain);
+    my $homsvr = &homeserver($rauthor,$rdomain);
     if (&hostname($homsvr) ne '') {
         my ($rdummy,$roledef)=
             &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
@@ -5296,11 +5693,11 @@ sub set_userprivs {
 
 sub role_status {
     my ($rolekey,$update,$refresh,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
-    my @pwhere = ();
     if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
-        (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
+        my ($one,$two) = split(m{\./},$rolekey,2);
+        (undef,undef,$$role) = split(/\./,$one,3);
         unless (!defined($$role) || $$role eq '') {
-            $$where=join('.',@pwhere);
+            $$where = '/'.$two;
             $$trolecode=$$role.'.'.$$where;
             ($$tstart,$$tend)=split(/\./,$env{$rolekey});
             $$tstatus='is';
@@ -5506,14 +5903,15 @@ sub unserialize {
     return {} if $rep =~ /^error/;
 
     my %returnhash=();
-    foreach my $item (split(/\&/,$rep)) {
-        my ($key, $value) = split(/=/, $item, 2);
-        $key = unescape($key) unless $escapedkeys;
-        next if $key =~ /^error: 2 /;
-        $returnhash{$key} = &thaw_unescape($value);
-    }
+	foreach my $item (split(/\&/,$rep)) {
+	    my ($key, $value) = split(/=/, $item, 2);
+	    $key = unescape($key) unless $escapedkeys;
+	    next if $key =~ /^error: 2 /;
+	    $returnhash{$key} = &thaw_unescape($value);
+	}
+    #return %returnhash;
     return \%returnhash;
-}
+}        
 
 # see Lond::dump_with_regexp
 # if $escapedkeys hash keys won't get unescaped.
@@ -5523,17 +5921,16 @@ sub dump {
     if (!$uname) { $uname=$env{'user.name'}; }
     my $uhome=&homeserver($uname,$udomain);
 
-    my $reply;
-    if (grep { $_ eq $uhome } &current_machine_ids()) {
-        # user is hosted on this machine
-        $reply = LONCAPA::Lond::dump_with_regexp(join(':', ($udomain,
-                    $uname, $namespace, $regexp, $range)), $perlvar{'lonVersion'});
-        return %{&unserialize($reply, $escapedkeys)};
-    }
     if ($regexp) {
-	$regexp=&escape($regexp);
+        $regexp=&escape($regexp);
     } else {
-	$regexp='.';
+        $regexp='.';
+    }
+    if (grep { $_ eq $uhome } current_machine_ids()) {
+        # user is hosted on this machine
+        my $reply = LONCAPA::Lond::dump_with_regexp(join(":", ($udomain,
+                    $uname, $namespace, $regexp, $range)), $perlvar{'lonVersion'});
+        return %{unserialize($reply, $escapedkeys)};
     }
     my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
     my @pairs=split(/\&/,$rep);
@@ -5541,7 +5938,8 @@ sub dump {
     if (!($rep =~ /^error/ )) {
 	foreach my $item (@pairs) {
 	    my ($key,$value)=split(/=/,$item,2);
-            $key = &unescape($key) unless ($escapedkeys);
+        $key = unescape($key) unless $escapedkeys;
+        #$key = &unescape($key);
 	    next if ($key =~ /^error: 2 /);
 	    $returnhash{$key}=&thaw_unescape($value);
 	}
@@ -5582,7 +5980,15 @@ sub currentdump {
    $sdom     = $env{'user.domain'}       if (! defined($sdom));
    $sname    = $env{'user.name'}         if (! defined($sname));
    my $uhome = &homeserver($sname,$sdom);
-   my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
+   my $rep;
+
+   if (grep { $_ eq $uhome } current_machine_ids()) {
+       $rep = LONCAPA::Lond::dump_profile_database(join(":", ($sdom, $sname, 
+                   $courseid)));
+   } else {
+       $rep = reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
+   }
+
    return if ($rep =~ /^(error:|no_such_host)/);
    #
    my %returnhash=();
@@ -5703,7 +6109,7 @@ sub newput {
 # ---------------------------------------------------------  putstore interface
 
 sub putstore {
-   my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
+   my ($namespace,$symb,$version,$storehash,$udomain,$uname,$tolog)=@_;
    if (!$udomain) { $udomain=$env{'user.domain'}; }
    if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
@@ -5717,6 +6123,17 @@ sub putstore {
    my $reply =
        &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
 	      $uhome);
+   if (($tolog) && ($reply eq 'ok')) {
+       my $namevalue='';
+       foreach my $key (keys(%{$storehash})) {
+           $namevalue.=&escape($key).'='.&freeze_escape($storehash->{$key}).'&';
+       }
+       $namevalue .= 'ip='.&escape($ENV{'REMOTE_ADDR'}).
+                     '&host='.&escape($perlvar{'lonHostID'}).
+                     '&version='.$esc_v.
+                     '&by='.&escape($env{'user.name'}.':'.$env{'user.domain'});
+       &Apache::lonnet::courselog($symb.':'.$uname.':'.$udomain.':PUTSTORE:'.$namevalue);
+   }
    if ($reply eq 'unknown_cmd') {
        # gfall back to way things use to be done
        return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
@@ -5825,13 +6242,13 @@ sub tmpdel {
     return &reply("tmpdel:$token",$server);
 }
 
-# ------------------------------------------------------------ get_timebased_id
+# ------------------------------------------------------------ get_timebased_id 
 
 sub get_timebased_id {
     my ($prefix,$keyid,$namespace,$cdom,$cnum,$idtype,$who,$locktries,
         $maxtries) = @_;
     my ($newid,$error,$dellock);
-    unless (($prefix =~ /^\w+$/) && ($keyid =~ /^\w+$/) && ($namespace ne '')) {
+    unless (($prefix =~ /^\w+$/) && ($keyid =~ /^\w+$/) && ($namespace ne '')) {  
         return ('','ok','invalid call to get suffix');
     }
 
@@ -5845,7 +6262,7 @@ sub get_timebased_id {
     if (!$maxtries) {
         $maxtries = 10;
     }
-
+    
     if (($cdom eq '') || ($cnum eq '')) {
         if ($env{'request.course.id'}) {
             $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
@@ -5875,10 +6292,15 @@ sub get_timebased_id {
         my %inuse = &Apache::lonnet::dump('nohist_'.$namespace,$cdom,$cnum,$prefix);
         my $id = time;
         $newid = $id;
+        if ($idtype eq 'addcode') {
+            $newid .= &sixnum_code();
+        }
         my $idtries = 0;
         while (exists($inuse{$prefix."\0".$newid}) && $idtries < $maxtries) {
             if ($idtype eq 'concat') {
                 $newid = $id.$idtries;
+            } elsif ($idtype eq 'addcode') {
+                $newid = $newid.&sixnum_code();
             } else {
                 $newid ++;
             }
@@ -5895,6 +6317,7 @@ sub get_timebased_id {
                 $error = 'error saving new item: '.$putresult;
             }
         } else {
+             undef($newid);
              $error = ('error: no unique suffix available for the new item ');
         }
 #  remove lock
@@ -5903,16 +6326,27 @@ sub get_timebased_id {
     } else {
         $error = "error: could not obtain lockfile\n";
         $dellock = 'ok';
+        if (($prefix eq 'paste') && ($namespace eq 'courseeditor') && ($keyid eq 'num')) {
+            $dellock = 'nolock';
+        }
     }
     return ($newid,$dellock,$error);
 }
 
+sub sixnum_code {
+    my $code;
+    for (0..6) {
+        $code .= int( rand(9) );
+    }
+    return $code;
+}
+
 # -------------------------------------------------- portfolio access checking
 
 sub portfolio_access {
-    my ($requrl) = @_;
+    my ($requrl,$clientip) = @_;
     my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
-    my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
+    my $result = &get_portfolio_access($udom,$unum,$file_name,$group,$clientip);
     if ($result) {
         my %setters;
         if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
@@ -5938,7 +6372,7 @@ sub portfolio_access {
 }
 
 sub get_portfolio_access {
-    my ($udom,$unum,$file_name,$group,$access_hash) = @_;
+    my ($udom,$unum,$file_name,$group,$clientip,$access_hash) = @_;
 
     if (!ref($access_hash)) {
 	my $current_perms = &get_portfile_permissions($udom,$unum);
@@ -5947,7 +6381,7 @@ sub get_portfolio_access {
 	$access_hash = $access_controls{$file_name};
     }
 
-    my ($public,$guest,@domains,@users,@courses,@groups);
+    my ($public,$guest,@domains,@users,@courses,@groups,@ips);
     my $now = time;
     if (ref($access_hash) eq 'HASH') {
         foreach my $key (keys(%{$access_hash})) {
@@ -5971,10 +6405,25 @@ sub get_portfolio_access {
                 push(@courses,$key);
             } elsif ($scope eq 'group') {
                 push(@groups,$key);
+            } elsif ($scope eq 'ip') {
+                push(@ips,$key);
             }
         }
         if ($public) {
             return 'ok';
+        } elsif (@ips > 0) {
+            my $allowed;
+            foreach my $ipkey (@ips) {
+                if (ref($access_hash->{$ipkey}{'ip'}) eq 'ARRAY') {
+                    if (&Apache::loncommon::check_ip_acc(join(',',@{$access_hash->{$ipkey}{'ip'}}),$clientip)) {
+                        $allowed = 1;
+                        last; 
+                    }
+                }
+            }
+            if ($allowed) {
+                return 'ok';
+            }
         }
         if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
             if ($guest) {
@@ -6161,6 +6610,8 @@ sub usertools_access {
                       official   => 1,
                       unofficial => 1,
                       community  => 1,
+                      textbook   => 1,
+                      placement  => 1,
                  );
     } elsif ($context eq 'requestauthor') {
         %tools = (
@@ -6176,7 +6627,7 @@ sub usertools_access {
     }
     return if (!defined($tools{$tool}));
 
-    if ((!defined($udom)) || (!defined($uname))) {
+    if (($udom eq '') || ($uname eq '')) {
         $udom = $env{'user.domain'};
         $uname = $env{'user.name'};
     }
@@ -6195,7 +6646,7 @@ sub usertools_access {
 
     my ($toolstatus,$inststatus,$envkey);
     if ($context eq 'requestauthor') {
-        $envkey = $context;
+        $envkey = $context; 
     } else {
         $envkey = $context.'.'.$tool;
     }
@@ -6457,7 +6908,7 @@ sub customaccess {
 # ------------------------------------------------- Check for a user privilege
 
 sub allowed {
-    my ($priv,$uri,$symb,$role)=@_;
+    my ($priv,$uri,$symb,$role,$clientip,$noblockcheck)=@_;
     my $ver_orguri=$uri;
     $uri=&deversion($uri);
     my $orguri=$uri;
@@ -6652,11 +7103,16 @@ sub allowed {
         if ($match) {
             if ($env{'user.priv.'.$env{'request.role'}.'./'}
                   =~/\Q$priv\E\&([^\:]*)/) {
-                my @blockers = &has_comm_blocking($priv,$symb,$uri);
-                if (@blockers > 0) {
-                    $thisallowed = 'B';
+                my $value = $1;
+                if ($noblockcheck) {
+                    $thisallowed.=$value;
                 } else {
-                    $thisallowed.=$1;
+                    my @blockers = &has_comm_blocking($priv,$symb,$uri);
+                    if (@blockers > 0) {
+                        $thisallowed = 'B';
+                    } else {
+                        $thisallowed.=$value;
+                    }
                 }
             }
         } else {
@@ -6668,11 +7124,15 @@ sub allowed {
                     $refuri=&declutter($refuri);
                     my ($match) = &is_on_map($refuri);
                     if ($match) {
-                        my @blockers = &has_comm_blocking($priv,$symb,$refuri);
-                        if (@blockers > 0) {
-                            $thisallowed = 'B';
-                        } else {
+                        if ($noblockcheck) {
                             $thisallowed='F';
+                        } else {
+                            my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+                            if (@blockers > 0) {
+                                $thisallowed = 'B';
+                            } else {
+                                $thisallowed='F';
+                            }
                         }
                     }
                 }
@@ -6684,9 +7144,9 @@ sub allowed {
 	&& $thisallowed ne 'F' 
 	&& $thisallowed ne '2'
 	&& &is_portfolio_url($uri)) {
-	$thisallowed = &portfolio_access($uri);
+	$thisallowed = &portfolio_access($uri,$clientip);
     }
-    
+
 # Full access at system, domain or course-wide level? Exit.
     if ($thisallowed=~/F/) {
 	return 'F';
@@ -6727,11 +7187,15 @@ sub allowed {
                =~/\Q$priv\E\&([^\:]*)/) {
                my $value = $1;
                if ($priv eq 'bre') {
-                   my @blockers = &has_comm_blocking($priv,$symb,$uri);
-                   if (@blockers > 0) {
-                       $thisallowed = 'B';
-                   } else {
+                   if ($noblockcheck) {
                        $thisallowed.=$value;
+                   } else {
+                       my @blockers = &has_comm_blocking($priv,$symb,$uri);
+                       if (@blockers > 0) {
+                           $thisallowed = 'B';
+                       } else {
+                           $thisallowed.=$value;
+                       }
                    }
                } else {
                    $thisallowed.=$value;
@@ -6765,11 +7229,15 @@ sub allowed {
                   =~/\Q$priv\E\&([^\:]*)/) {
                   my $value = $1;
                   if ($priv eq 'bre') {
-                      my @blockers = &has_comm_blocking($priv,$symb,$refuri);
-                      if (@blockers > 0) {
-                          $thisallowed = 'B';
-                      } else {
+                      if ($noblockcheck) {
                           $thisallowed.=$value;
+                      } else {
+                          my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+                          if (@blockers > 0) {
+                              $thisallowed = 'B';
+                          } else {
+                              $thisallowed.=$value;
+                          }
                       }
                   } else {
                       $thisallowed.=$value;
@@ -6877,7 +7345,7 @@ 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'});
@@ -6887,7 +7355,7 @@ 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 '.
 			$env{'request.course.id'});
@@ -6945,7 +7413,7 @@ sub constructaccess {
     my ($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 ''; }
@@ -6966,6 +7434,15 @@ 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,
@@ -7000,6 +7477,32 @@ sub constructaccess {
     return '';
 }
 
+# ----------------------------------------------------------- Content Blocking
+
+{
+# Caches for faster Course Contents display where content blocking
+# is in operation (i.e., interval param set) for timed quiz.
+#
+# User for whom data are being temporarily cached.
+my $cacheduser='';
+# Cached blockers for this user (a hash of blocking items). 
+my %cachedblockers=();
+# When the data were last cached.
+my $cachedlast='';
+
+sub load_all_blockers {
+    my ($uname,$udom,$blocks)=@_;
+    if (($uname ne '') && ($udom ne '')) { 
+        if (($cacheduser eq $uname.':'.$udom) &&
+            (abs($cachedlast-time)<5)) {
+            return;
+        }
+    }
+    $cachedlast=time;
+    $cacheduser=$uname.':'.$udom;
+    %cachedblockers = &get_commblock_resources($blocks);
+}
+
 sub get_comm_blocks {
     my ($cdom,$cnum) = @_;
     if ($cdom eq '' || $cnum eq '') {
@@ -7020,27 +7523,21 @@ sub get_comm_blocks {
     return %commblocks;
 }
 
-sub has_comm_blocking {
-    my ($priv,$symb,$uri,$blocks) = @_;
-    return unless ($env{'request.course.id'});
-    return unless ($priv eq 'bre');
-    return if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
+sub get_commblock_resources {
+    my ($blocks) = @_;
+    my %blockers = ();
+    return %blockers unless ($env{'request.course.id'});
+    return %blockers if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
     my %commblocks;
     if (ref($blocks) eq 'HASH') {
         %commblocks = %{$blocks};
     } else {
         %commblocks = &get_comm_blocks();
     }
-    return unless (keys(%commblocks) > 0);
-    if (!$symb) { $symb=&symbread($uri,1); }
-    my ($map,$resid,undef)=&decode_symb($symb);
-    my %tocheck = (
-                    maps      => $map,
-                    resources => $symb,
-                  );
-    my @blockers;
-    my $now = time;
+    return %blockers unless (keys(%commblocks) > 0); 
     my $navmap = Apache::lonnavmaps::navmap->new();
+    return %blockers unless (ref($navmap));
+    my $now = time;
     foreach my $block (keys(%commblocks)) {
         if ($block =~ /^(\d+)____(\d+)$/) {
             my ($start,$end) = ($1,$2);
@@ -7048,17 +7545,13 @@ sub has_comm_blocking {
                 if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
                     if (ref($commblocks{$block}{'blocks'}{'docs'}) eq 'HASH') {
                         if (ref($commblocks{$block}{'blocks'}{'docs'}{'maps'}) eq 'HASH') {
-                            if ($commblocks{$block}{'blocks'}{'docs'}{'maps'}{$map}) {
-                                unless (grep(/^\Q$block\E$/,@blockers)) {
-                                    push(@blockers,$block);
-                                }
+                            if (keys(%{$commblocks{$block}{'blocks'}{'docs'}{'maps'}})) {
+                                $blockers{$block}{maps} = $commblocks{$block}{'blocks'}{'docs'}{'maps'}; 
                             }
                         }
                         if (ref($commblocks{$block}{'blocks'}{'docs'}{'resources'}) eq 'HASH') {
-                            if ($commblocks{$block}{'blocks'}{'docs'}{'resources'}{$symb}) {
-                                unless (grep(/^\Q$block\E$/,@blockers)) {  
-                                    push(@blockers,$block);
-                                }
+                            if (keys(%{$commblocks{$block}{'blocks'}{'docs'}{'resources'}})) {
+                                $blockers{$block}{'resources'} = $commblocks{$block}{'blocks'}{'docs'}{'resources'};
                             }
                         }
                     }
@@ -7069,32 +7562,31 @@ sub has_comm_blocking {
             my @to_test;
             if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
                 if (ref($commblocks{$block}{'blocks'}{'docs'}) eq 'HASH') {
-                    my $check_interval;
-                    if (&check_docs_block($commblocks{$block}{'blocks'}{'docs'},\%tocheck)) {
-                        my @interval;
-                        my $type = 'map';
-                        if ($item eq 'course') {
-                            $type = 'course';
-                            @interval=&EXT("resource.0.interval");
+                    my @interval;
+                    my $type = 'map';
+                    if ($item eq 'course') {
+                        $type = 'course';
+                        @interval=&EXT("resource.0.interval");
+                    } else {
+                        if ($item =~ /___\d+___/) {
+                            $type = 'resource';
+                            @interval=&EXT("resource.0.interval",$item);
+                            if (ref($navmap)) {                        
+                                my $res = $navmap->getBySymb($item); 
+                                push(@to_test,$res);
+                            }
                         } else {
-                            if ($item =~ /___\d+___/) {
-                                $type = 'resource';
-                                @interval=&EXT("resource.0.interval",$item);
-                                if (ref($navmap)) {                        
-                                    my $res = $navmap->getBySymb($item); 
-                                    push(@to_test,$res);
-                                }
-                            } else {
-                                my $mapsymb = &symbread($item,1);
-                                if ($mapsymb) {
-                                    if (ref($navmap)) {
-                                        my $mapres = $navmap->getBySymb($mapsymb);
-                                        @to_test = $mapres->retrieveResources($mapres,undef,0,1);
-                                        foreach my $res (@to_test) {
-                                            my $symb = $res->symb();
-                                            next if ($symb eq $mapsymb);
-                                            if ($symb ne '') {
-                                                @interval=&EXT("resource.0.interval",$symb);
+                            my $mapsymb = &symbread($item,1);
+                            if ($mapsymb) {
+                                if (ref($navmap)) {
+                                    my $mapres = $navmap->getBySymb($mapsymb);
+                                    @to_test = $mapres->retrieveResources($mapres,undef,0,0,0,1);
+                                    foreach my $res (@to_test) {
+                                        my $symb = $res->symb();
+                                        next if ($symb eq $mapsymb);
+                                        if ($symb ne '') {
+                                            @interval=&EXT("resource.0.interval",$symb);
+                                            if ($interval[1] eq 'map') {
                                                 last;
                                             }
                                         }
@@ -7102,26 +7594,36 @@ sub has_comm_blocking {
                                 }
                             }
                         }
-                        if ($interval[0] =~ /\d+/) {
-                            my $first_access;
-                            if ($type eq 'resource') {
-                                $first_access=&get_first_access($interval[1],$item);
-                            } elsif ($type eq 'map') {
-                                $first_access=&get_first_access($interval[1],undef,$item);
-                            } else {
-                                $first_access=&get_first_access($interval[1]);
-                            }
-                            if ($first_access) {
-                                my $timesup = $first_access+$interval[0];
-                                if ($timesup > $now) {
-                                    foreach my $res (@to_test) {
-                                        if ($res->is_problem()) {
-                                            if ($res->completable()) {
-                                                unless (grep(/^\Q$block\E$/,@blockers)) {
-                                                    push(@blockers,$block);
-                                                }
-                                                last;
-                                            }
+                    }
+                    if ($interval[0] =~ /^(\d+)/) {
+                        my $timelimit = $1; 
+                        my $first_access;
+                        if ($type eq 'resource') {
+                            $first_access=&get_first_access($interval[1],$item);
+                        } elsif ($type eq 'map') {
+                            $first_access=&get_first_access($interval[1],undef,$item);
+                        } else {
+                            $first_access=&get_first_access($interval[1]);
+                        }
+                        if ($first_access) {
+                            my $timesup = $first_access+$timelimit;
+                            if ($timesup > $now) {
+                                my $activeblock;
+                                foreach my $res (@to_test) {
+                                    if ($res->answerable()) {
+                                        $activeblock = 1;
+                                        last;
+                                    }
+                                }
+                                if ($activeblock) {
+                                    if (ref($commblocks{$block}{'blocks'}{'docs'}{'maps'}) eq 'HASH') {
+                                         if (keys(%{$commblocks{$block}{'blocks'}{'docs'}{'maps'}})) {
+                                             $blockers{$block}{'maps'} = $commblocks{$block}{'blocks'}{'docs'}{'maps'};
+                                         }
+                                    }
+                                    if (ref($commblocks{$block}{'blocks'}{'docs'}{'resources'}) eq 'HASH') {
+                                        if (keys(%{$commblocks{$block}{'blocks'}{'docs'}{'resources'}})) {
+                                            $blockers{$block}{'resources'} = $commblocks{$block}{'blocks'}{'docs'}{'resources'};
                                         }
                                     }
                                 }
@@ -7132,33 +7634,66 @@ sub has_comm_blocking {
             }
         }
     }
-    return @blockers;
+    return %blockers;
 }
 
-sub check_docs_block {
-    my ($docsblock,$tocheck) =@_;
-    if ((ref($docsblock) ne 'HASH') || (ref($tocheck) ne 'HASH')) {
-        return;
+sub has_comm_blocking {
+    my ($priv,$symb,$uri,$blocks) = @_;
+    my @blockers;
+    return unless ($env{'request.course.id'});
+    return unless ($priv eq 'bre');
+    return if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
+    return if ($env{'request.state'} eq 'construct');
+    &load_all_blockers($env{'user.name'},$env{'user.domain'},$blocks);
+    return unless (keys(%cachedblockers) > 0);
+    my (%possibles,@symbs);
+    if (!$symb) {
+        $symb = &symbread($uri,1,1,1,\%possibles);
     }
-    if (ref($docsblock->{'maps'}) eq 'HASH') {
-        if ($tocheck->{'maps'}) {
-            if ($docsblock->{'maps'}{$tocheck->{'maps'}}) {
-                return 1;
+    if ($symb) {
+        @symbs = ($symb);
+    } elsif (keys(%possibles)) { 
+        @symbs = keys(%possibles);
+    }
+    my $noblock;
+    foreach my $symb (@symbs) {
+        last if ($noblock);
+        my ($map,$resid,$resurl)=&decode_symb($symb);
+        foreach my $block (keys(%cachedblockers)) {
+            if ($block =~ /^firstaccess____(.+)$/) {
+                my $item = $1;
+                if (($item eq $map) || ($item eq $symb)) {
+                    $noblock = 1;
+                    last;
+                }
             }
-        }
-    }
-    if (ref($docsblock->{'resources'}) eq 'HASH') {
-        if ($tocheck->{'resources'}) {
-            if ($docsblock->{'resources'}{$tocheck->{'resources'}}) {
-                return 1;
+            if (ref($cachedblockers{$block}) eq 'HASH') {
+                if (ref($cachedblockers{$block}{'resources'}) eq 'HASH') {
+                    if ($cachedblockers{$block}{'resources'}{$symb}) {
+                        unless (grep(/^\Q$block\E$/,@blockers)) {
+                            push(@blockers,$block);
+                        }
+                    }
+                }
+            }
+            if (ref($cachedblockers{$block}{'maps'}) eq 'HASH') {
+                if ($cachedblockers{$block}{'maps'}{$map}) {
+                    unless (grep(/^\Q$block\E$/,@blockers)) {
+                        push(@blockers,$block);
+                    }
+                }
             }
         }
     }
-    return;
+    return if ($noblock);
+    return @blockers;
+}
 }
 
+# -------------------------------- Deversion and split uri into path an filename   
+
 #
-#   Removes the versino from a URI and
+#   Removes the version from a URI and
 #   splits it in to its filename and path to the filename.
 #   Seems like File::Basename could have done this more clearly.
 #   Parameters:
@@ -7267,19 +7802,23 @@ sub definerole {
 # ---------------- Make a metadata query against the network of library servers
 
 sub metadata_query {
-    my ($query,$custom,$customshow,$server_array)=@_;
+    my ($query,$custom,$customshow,$server_array,$domains_hash)=@_;
     my %rhash;
     my %libserv = &all_library();
     my @server_list = (defined($server_array) ? @$server_array
                                               : keys(%libserv) );
     for my $server (@server_list) {
+        my $domains = ''; 
+        if (ref($domains_hash) eq 'HASH') {
+            $domains = $domains_hash->{$server}; 
+        }
 	unless ($custom or $customshow) {
-	    my $reply=&reply("querysend:".&escape($query),$server);
+	    my $reply=&reply("querysend:".&escape($query).':::'.&escape($domains),$server);
 	    $rhash{$server}=$reply;
 	}
 	else {
 	    my $reply=&reply("querysend:".&escape($query).':'.
-			     &escape($custom).':'.&escape($customshow),
+			     &escape($custom).':'.&escape($customshow).':'.&escape($domains),
 			     $server);
 	    $rhash{$server}=$reply;
 	}
@@ -7336,10 +7875,12 @@ 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,$dom);
@@ -7357,10 +7898,10 @@ sub fetch_enrollment_query {
         &logthis('fetch_enrollment_query: invalid queryid: '.$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/) ) {
@@ -7402,11 +7943,17 @@ 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 $reply='';
-    for (1..100) {
-	sleep 2;
+    for (1..$loopmax) {
+	sleep($sleep);
         if (-e $replyfile.'.end') {
 	    if (open(my $fh,$replyfile)) {
 		$reply = join('',<$fh>);
@@ -7768,17 +8315,20 @@ sub auto_courserequest_checks {
 }
 
 sub auto_courserequest_validation {
-    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = @_;
+    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$custominfo) = @_;
     my ($homeserver,$response);
     if ($dom =~ /^$match_domain$/) {
         $homeserver = &domain($dom,'primary');
     }
-    unless ($homeserver eq 'no_host') {  
-          
+    unless ($homeserver eq 'no_host') {
+        my $customdata;
+        if (ref($custominfo) eq 'HASH') {
+            $customdata = &freeze_escape($custominfo);
+        }
         $response=&unescape(&reply('autocrsreqvalidation:'.$dom.':'.&escape($owner).
                                     ':'.&escape($crstype).':'.&escape($inststatuslist).
-                                    ':'.&escape($instcode).':'.&escape($instseclist),
-                                    $homeserver));
+                                    ':'.&escape($instcode).':'.&escape($instseclist).':'.
+                                    $customdata,$homeserver));
     }
     return $response;
 }
@@ -7797,6 +8347,136 @@ sub auto_validate_class_sec {
     return $response;
 }
 
+sub auto_crsreq_update {
+    my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,
+        $code,$accessstart,$accessend,$inbound) = @_;
+    my ($homeserver,%crsreqresponse);
+    if ($cdom =~ /^$match_domain$/) {
+        $homeserver = &domain($cdom,'primary');
+    }
+    unless (($homeserver eq 'no_host') || ($homeserver eq '')) {
+        my $info;
+        if (ref($inbound) eq 'HASH') {
+            $info = &freeze_escape($inbound);
+        }
+        my $response=&reply('autocrsrequpdate:'.$cdom.':'.$cnum.':'.&escape($crstype).
+                            ':'.&escape($action).':'.&escape($ownername).':'.
+                            &escape($ownerdomain).':'.&escape($fullname).':'.
+                            &escape($title).':'.&escape($code).':'.
+                            &escape($accessstart).':'.&escape($accessend).':'.$info,
+                            $homeserver);
+        unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
+            my @items = split(/&/,$response);
+            foreach my $item (@items) {
+                my ($key,$value) = split('=',$item);
+                $crsreqresponse{&unescape($key)} = &thaw_unescape($value);
+            }
+        }
+    }
+    return \%crsreqresponse;
+}
+
+sub auto_export_grades {
+    my ($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')) {
+        return;
+    }
+    my $canclone;
+    if (@{$code_order} > 0) {
+        my $instcoderegexp ='^';
+        my @clonecodes = split(/\&/,$cloner);
+        foreach my $item (@{$code_order}) {
+            if (grep(/^\Q$item\E=/,@clonecodes)) {
+                foreach my $pair (@clonecodes) {
+                    my ($key,$val) = split(/\=/,$pair,2);
+                    $val = &unescape($val);
+                    if ($key eq $item) {
+                        $instcoderegexp .= '('.$val.')';
+                        last;
+                    }
+                }
+            } else {
+                $instcoderegexp .= $codedefaults->{$item};
+            }
+        }
+        $instcoderegexp .= '$';
+        my (@from,@to);
+        eval {
+               (@from) = ($clonefromcode =~ /$instcoderegexp/);
+               (@to) = ($clonetocode =~ /$instcoderegexp/);
+        };
+        if ((@from > 0) && (@to > 0)) {
+            my @diffs = &Apache::loncommon::compare_arrays(\@from,\@to);
+            if (!@diffs) {
+                $canclone = 1;
+            }
+        }
+    }
+    return $canclone;
+}
+
+sub default_instcode_cloning {
+    my ($clonedom,$domdefclone,$clonefromcode,$clonetocode,$codedefaultsref,$codeorderref) = @_;
+    my (%codedefaults,@code_order,$canclone);
+    if ((ref($codedefaultsref) eq 'HASH') && (ref($codeorderref) eq 'ARRAY')) {
+        %codedefaults = %{$codedefaultsref};
+        @code_order = @{$codeorderref};
+    } elsif ($clonedom) {
+        &auto_instcode_defaults($clonedom,\%codedefaults,\@code_order);
+    }
+    if (($domdefclone) && (@code_order)) {
+        my @clonecodes = split(/\+/,$domdefclone);
+        my $instcoderegexp ='^';
+        foreach my $item (@code_order) {
+            if (grep(/^\Q$item\E$/,@clonecodes)) {
+                $instcoderegexp .= '('.$codedefaults{$item}.')';
+            } else {
+                $instcoderegexp .= $codedefaults{$item};
+            }
+        }
+        $instcoderegexp .= '$';
+        my (@from,@to);
+        eval {
+            (@from) = ($clonefromcode =~ /$instcoderegexp/);
+            (@to) = ($clonetocode =~ /$instcoderegexp/);
+        };
+        if ((@from > 0) && (@to > 0)) {
+            my @diffs = &Apache::loncommon::compare_arrays(\@from,\@to);
+            if (!@diffs) {
+                $canclone = 1;
+            }
+        }
+    }
+    return $canclone;
+}
+
 # ------------------------------------------------------- Course Group routines
 
 sub get_coursegroups {
@@ -7944,6 +8624,7 @@ sub plaintext {
     my %rolenames = (
                       Course    => 'std',
                       Community => 'alt1',
+                      Placement => 'std',
                     );
     if ($cid ne '') {
         if ($env{'course.'.$cid.'.'.$short.'.plaintext'} ne '') {
@@ -8065,7 +8746,7 @@ sub assignrole {
                         }
                     }
                 } elsif ($context eq 'requestauthor') {
-                    if (($udom eq $env{'user.domain'}) && ($uname eq $env{'user.name'}) &&
+                    if (($udom eq $env{'user.domain'}) && ($uname eq $env{'user.name'}) && 
                         ($url eq '/'.$udom.'/') && ($role eq 'au')) {
                         if ($env{'environment.requestauthor'} eq 'automatic') {
                             $refused = '';
@@ -8073,13 +8754,13 @@ sub assignrole {
                             my %domdefaults = &get_domain_defaults($udom);
                             if (ref($domdefaults{'requestauthor'}) eq 'HASH') {
                                 my $checkbystatus;
-                                if ($env{'user.adv'}) {
+                                if ($env{'user.adv'}) { 
                                     my $disposition = $domdefaults{'requestauthor'}{'_LC_adv'};
                                     if ($disposition eq 'automatic') {
                                         $refused = '';
                                     } elsif ($disposition eq '') {
                                         $checkbystatus = 1;
-                                    }
+                                    } 
                                 } else {
                                     $checkbystatus = 1;
                                 }
@@ -8166,7 +8847,7 @@ sub assignrole {
                            $context);
         } elsif (($role eq 'ca') || ($role eq 'aa')) {
             &coauthorrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
-                             $context);
+                             $context); 
         }
         if ($role eq 'cc') {
             &autoupdate_coowners($url,$end,$start,$uname,$udom);
@@ -8356,7 +9037,7 @@ sub modifyuser {
                   'current user id "'.$uidhash{$uname}.'".';
           }
        } else {
-	  &idput($udom,($uname => $uid));
+	  &idput($udom,{$uname => $uid},$uhome,'ids');
        }
     }
 # -------------------------------------------------------------- Add names, etc
@@ -8466,7 +9147,7 @@ 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';
@@ -8478,17 +9159,17 @@ sub modifystudent {
          $desiredhome,$email,$inststatus);
     unless ($reply eq 'ok') { return $reply; }
     # This will cause &modify_student_enrollment to get the uid from the
-    # students environment
+    # student's environment
     $uid = undef if (!$forceid);
     $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
-					$gene,$usec,$end,$start,$type,$locktype,
-                                        $cid,$selfenroll,$context,$credits);
+                                        $gene,$usec,$end,$start,$type,$locktype,
+                                        $cid,$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'}) {
@@ -8535,7 +9216,7 @@ 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);
@@ -8963,6 +9644,90 @@ sub files_not_in_path {
     return (@return_files);
 }
 
+#------------------------------Submitted/Handedback Portfolio Files Versioning
+ 
+sub portfiles_versioning {
+    my ($symb,$domain,$stu_name,$portfiles,$versioned_portfiles) = @_;
+    my $portfolio_root = '/userfiles/portfolio';
+    return unless ((ref($portfiles) eq 'ARRAY') && (ref($versioned_portfiles) eq 'ARRAY'));
+    foreach my $file (@{$portfiles}) {
+        &unmark_as_readonly($domain,$stu_name,[$symb,$env{'request.course.id'}],$file);
+        my ($directory,$answer_file) =($file =~ /^(.*?)([^\/]*)$/);
+        my ($answer_name,$answer_ver,$answer_ext) = &file_name_version_ext($answer_file);
+        my $getpropath = 1;
+        my ($dir_list,$listerror) = &dirlist($portfolio_root.$directory,$domain,
+                                             $stu_name,$getpropath);
+        my $version = &get_next_version($answer_name,$answer_ext,$dir_list);
+        my $new_answer = 
+            &version_selected_portfile($domain,$stu_name,$directory,$answer_file,$version);
+        if ($new_answer ne 'problem getting file') {
+            push(@{$versioned_portfiles}, $directory.$new_answer);
+            &mark_as_readonly($domain,$stu_name,[$directory.$new_answer],
+                              [$symb,$env{'request.course.id'},'graded']);
+        }
+    }
+}
+
+sub get_next_version {
+    my ($answer_name, $answer_ext, $dir_list) = @_;
+    my $version;
+    if (ref($dir_list) eq 'ARRAY') {
+        foreach my $row (@{$dir_list}) {
+            my ($file) = split(/\&/,$row,2);
+            my ($file_name,$file_version,$file_ext) =
+                &file_name_version_ext($file);
+            if (($file_name eq $answer_name) &&
+                ($file_ext eq $answer_ext)) {
+                     # gets here if filename and extension match,
+                     # regardless of version
+                if ($file_version ne '') {
+                    # a versioned file is found  so save it for later
+                    if ($file_version > $version) {
+                        $version = $file_version;
+                    }
+                }
+            }
+        }
+    }
+    $version ++;
+    return($version);
+}
+
+sub version_selected_portfile {
+    my ($domain,$stu_name,$directory,$file_name,$version) = @_;
+    my ($answer_name,$answer_ver,$answer_ext) =
+        &file_name_version_ext($file_name);
+    my $new_answer;
+    $env{'form.copy'} =
+        &getfile("/uploaded/$domain/$stu_name/portfolio$directory$file_name");
+    if($env{'form.copy'} eq '-1') {
+        $new_answer = 'problem getting file';
+    } else {
+        $new_answer = $answer_name.'.'.$version.'.'.$answer_ext;
+        my $copy_result = 
+            &finishuserfileupload($stu_name,$domain,'copy',
+                                  '/portfolio'.$directory.$new_answer);
+    }
+    undef($env{'form.copy'});
+    return ($new_answer);
+}
+
+sub file_name_version_ext {
+    my ($file)=@_;
+    my @file_parts = split(/\./, $file);
+    my ($name,$version,$ext);
+    if (@file_parts > 1) {
+        $ext=pop(@file_parts);
+        if (@file_parts > 1 && $file_parts[-1] =~ /^\d+$/) {
+            $version=pop(@file_parts);
+        }
+        $name=join('.',@file_parts);
+    } else {
+        $name=join('.',@file_parts);
+    }
+    return($name,$version,$ext);
+}
+
 #----------------------------------------------Get portfolio file permissions
 
 sub get_portfile_permissions {
@@ -9059,9 +9824,9 @@ sub modify_access_controls {
     my $tries = 0;
     my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
    
-    while (($gotlock ne 'ok') && $tries <3) {
+    while (($gotlock ne 'ok') && $tries < 10) {
         $tries ++;
-        sleep 1;
+        sleep(0.1);
         $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
     }
     if ($gotlock eq 'ok') {
@@ -9107,49 +9872,132 @@ sub modify_access_controls {
 }
 
 sub make_public_indefinitely {
-    my ($requrl) = @_;
+    my (@requrl) = @_;
+    return &automated_portfile_access('public',\@requrl);
+}
+
+sub automated_portfile_access {
+    my ($accesstype,$addsref,$delsref,$info) = @_;
+    unless (($accesstype eq 'public') || ($accesstype eq 'ip')) {
+        return 'invalid';
+    }
+    my %urls;
+    if (ref($addsref) eq 'ARRAY') {
+        foreach my $requrl (@{$addsref}) {
+            if (&is_portfolio_url($requrl)) {
+                unless (exists($urls{$requrl})) {
+                    $urls{$requrl} = 'add';
+                }
+            }
+        }
+    }
+    if (ref($delsref) eq 'ARRAY') {
+        foreach my $requrl (@{$delsref}) { 
+            if (&is_portfolio_url($requrl)) {
+                unless (exists($urls{$requrl})) {
+                    $urls{$requrl} = 'delete'; 
+                }
+            }
+        }
+    }
+    unless (keys(%urls)) {
+        return 'invalid';
+    }
+    my $ip;
+    if ($accesstype eq 'ip') {
+        if (ref($info) eq 'HASH') {
+            if ($info->{'ip'} ne '') {
+                $ip = $info->{'ip'};
+            }
+        }
+        if ($ip eq '') {
+            return 'invalid';
+        }
+    }
+    my $errors;
     my $now = time;
-    my $action = 'activate';
-    my $aclnum = 0;
-    if (&is_portfolio_url($requrl)) {
+    my %current_perms;
+    foreach my $requrl (sort(keys(%urls))) {
+        my $action;
+        if ($urls{$requrl} eq 'add') {
+            $action = 'activate';
+        } else {
+            $action = 'none';
+        }
+        my $aclnum = 0;
         my (undef,$udom,$unum,$file_name,$group) =
             &parse_portfolio_url($requrl);
-        my $current_perms = &get_portfile_permissions($udom,$unum);
-        my %access_controls = &get_access_controls($current_perms,
+        unless (exists($current_perms{$unum.':'.$udom})) {
+            $current_perms{$unum.':'.$udom} = &get_portfile_permissions($udom,$unum);
+        }
+        my %access_controls = &get_access_controls($current_perms{$unum.':'.$udom},
                                                    $group,$file_name);
         foreach my $key (keys(%{$access_controls{$file_name}})) {
             my ($num,$scope,$end,$start) = 
                 ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
-            if ($scope eq 'public') {
-                if ($start <= $now && $end == 0) {
-                    $action = 'none';
-                } else {
+            if ($scope eq $accesstype) {
+                if (($start <= $now) && ($end == 0)) {
+                    if ($accesstype eq 'ip') {
+                        if (ref($access_controls{$file_name}{$key}) eq 'HASH') {
+                            if (ref($access_controls{$file_name}{$key}{'ip'}) eq 'ARRAY') {
+                                if (grep(/^\Q$ip\E$/,@{$access_controls{$file_name}{$key}{'ip'}})) {
+                                    if ($urls{$requrl} eq 'add') {
+                                        $action = 'none';
+                                        last;
+                                    } else {
+                                        $action = 'delete';
+                                        $aclnum = $num;
+                                        last;
+                                    }
+                                }
+                            }
+                        }
+                    } elsif ($accesstype eq 'public') {
+                        if ($urls{$requrl} eq 'add') {
+                            $action = 'none';
+                            last;
+                        } else {
+                            $action = 'delete';
+                            $aclnum = $num;
+                            last;
+                        }
+                    }
+                } elsif ($accesstype eq 'public') {
                     $action = 'update';
                     $aclnum = $num;
+                    last;
                 }
-                last;
             }
         }
         if ($action eq 'none') {
-             return 'ok';
+            next;
         } else {
             my %changes;
             my $newend = 0;
             my $newstart = $now;
-            my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
+            my $newkey = $aclnum.':'.$accesstype.'_'.$newend.'_'.$newstart;
             $changes{$action}{$newkey} = {
-                type => 'public',
+                type => $accesstype,
                 time => {
                     start => $newstart,
                     end   => $newend,
                 },
             };
+            if ($accesstype eq 'ip') {
+                $changes{$action}{$newkey}{'ip'} = [$ip];
+            }
             my ($outcome,$deloutcome,$new_values,$translation) =
                 &modify_access_controls($file_name,\%changes,$udom,$unum);
-            return $outcome;
+            unless ($outcome eq 'ok') {
+                $errors .= $outcome.' ';
+            }
         }
+    }
+    if ($errors) {
+        $errors =~ s/\s$//;
+        return $errors;
     } else {
-        return 'invalid';
+        return 'ok';
     }
 }
 
@@ -9354,7 +10202,24 @@ 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');
         }
@@ -9427,6 +10292,115 @@ 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
@@ -9571,10 +10545,12 @@ 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);
@@ -9588,7 +10564,14 @@ 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.
+#     $what      - Last part of param identifier.
 #     @which     - Array of names of resources desired.
 #  Returns:
 #     The value of the first reasource in @which that is found in the
@@ -9598,7 +10581,8 @@ sub get_userresdata {
 #     'user', an undefined  reference is returned.
 #     If none of the resources are found, an undef is returned
 sub resdata {
-    my ($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,$domain);
@@ -9607,17 +10591,80 @@ sub resdata {
     }
     if (!ref($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.':'.$cdom;
+    my ($suppcount,$cached);
+    unless ($ignorecache) {
+        ($suppcount,$cached) = &is_cached_new('suppcount',$hashid);
+    }
+    unless (defined($cached)) {
+        my $chome=&homeserver($cnum,$cdom);
+        unless ($chome eq 'no_host') {
+            ($suppcount,my $errors) = (0,0);
+            my $suppmap = 'supplemental.sequence';
+            ($suppcount,$errors) = 
+                &Apache::loncommon::recurse_supplemental($cnum,$cdom,$suppmap,$suppcount,$errors);
+        }
+        &do_cache_new('suppcount',$hashid,$suppcount,600);
+    }
+    return $suppcount;
+}
+
 #
 # 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.');
 }
@@ -9795,23 +10842,22 @@ 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 = $cid;
         }
 	if (($symbparm && $courseid) && 
-	    (($courseid eq $env{'request.course.id'}) || ($courseid eq $cid))) {
+	    (($courseid eq $env{'request.course.id'}) || ($courseid eq $cid)))  {
 
 	    #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
 
 # ----------------------------------------------------- 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'};
@@ -9828,17 +10874,21 @@ 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); }
 
@@ -9846,15 +10896,18 @@ 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); }
@@ -9871,8 +10924,9 @@ 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) {
@@ -9880,18 +10934,20 @@ 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); }
 	}
@@ -9948,22 +11004,51 @@ 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 ($courseid,@groups) = @_;
     @groups = sort(@groups);
@@ -10048,11 +11133,11 @@ sub metadata {
     # if it is a non metadata possible uri return quickly
     if (($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$})) {
 	return undef;
     }
-    if (($uri =~ /^priv/ || $uri=~/home\/httpd\/html\/priv/) 
+    if (($uri =~ /^priv/ || $uri=~m{^home/httpd/html/priv}) 
 	&& &Apache::lonxml::get_state('target') =~ /^(|meta)$/) {
 	return undef;
     }
@@ -10313,7 +11398,7 @@ sub metadata {
 
 	$metaentry{':keys'} = join(',',keys(%metathesekeys));
 	&metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
-	$metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
+	$metaentry{':allpossiblekeys'}=join(',',keys(%metathesekeys));
 	&do_cache_new('meta',$uri,\%metaentry,$cachetime);
 # this is the end of "was not already recently cached
     }
@@ -10589,7 +11674,7 @@ sub symbverify {
             $ids=$bighash{'ids_'.&clutter($thisurl)};
         }
         unless ($ids) {
-            my $idkey = 'ids_'.($thisurl =~ m{^/}? '' : '/').$thisurl;
+            my $idkey = 'ids_'.($thisurl =~ m{^/}? '' : '/').$thisurl;  
             $ids=$bighash{$idkey};
         }
         if ($ids) {
@@ -10605,14 +11690,14 @@ sub symbverify {
                    if (ref($encstate)) {
                        $$encstate = $bighash{'encrypted_'.$id};
                    }
-                   if (($env{'request.role.adv'}) ||
-                       ($bighash{'encrypted_'.$id} eq $env{'request.enc'}) ||
+		   if (($env{'request.role.adv'}) ||
+		       ($bighash{'encrypted_'.$id} eq $env{'request.enc'}) ||
                        ($thisurl eq '/adm/navmaps')) {
-                       $okay=1;
+		       $okay=1;
                        last;
-                   }
-               }
-           }
+		   }
+	       }
+	   }
         }
 	untie(%bighash);
     }
@@ -10684,19 +11769,21 @@ sub deversion {
 # ------------------------------------------------------ Return symb list entry
 
 sub symbread {
-    my ($thisfn,$donotrecurse)=@_;
-    my $cache_str;
-    if ($thisfn ne '') {
-        $cache_str='request.symbread.cached.'.$thisfn;
-        if ($env{$cache_str} ne '') {
+    my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles)=@_;
+    my $cache_str='request.symbread.cached.'.$thisfn;
+    if (defined($env{$cache_str})) {
+        if ($ignorecachednull) {
+            return $env{$cache_str} unless ($env{$cache_str} eq '');
+        } else {
             return $env{$cache_str};
         }
-   } else {
+    }
 # no filename provided? try from environment
+    unless ($thisfn) {
         if ($env{'request.symb'}) {
-            return $env{$cache_str}=&symbclean($env{'request.symb'});
-        }
-        $thisfn=$env{'request.filename'};
+	    return $env{$cache_str}=&symbclean($env{'request.symb'});
+	}
+	$thisfn=$env{'request.filename'};
     }
     if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
 # is that filename actually a symb? Verify, clean, and return
@@ -10752,18 +11839,46 @@ sub symbread {
 		     my ($mapid,$resid)=split(/\./,$ids);
 		     $syval=&encode_symb($bighash{'map_id_'.$mapid},
 						    $resid,$thisfn);
-                 } elsif (!$donotrecurse) {
+                     if (ref($possibles) eq 'HASH') {
+                         $possibles->{$syval} = 1;    
+                     }
+                     if ($checkforblock) {
+                         my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids});
+                         if (@blockers) {
+                             $syval = '';
+                             return;
+                         }
+                     }
+                 } elsif ((!$donotrecurse) || ($checkforblock) || (ref($possibles) eq 'HASH')) { 
 # ------------------------------------------ There is more than one possibility
                      my $realpossible=0;
                      foreach my $id (@possibilities) {
 			 my $file=$bighash{'src_'.$id};
-                         if (&allowed('bre',$file)) {
-         		    my ($mapid,$resid)=split(/\./,$id);
-                            if ($bighash{'map_type_'.$mapid} ne 'page') {
-				$realpossible++;
-                                $syval=&encode_symb($bighash{'map_id_'.$mapid},
-						    $resid,$thisfn);
-                            }
+                         my $canaccess;
+                         if (($donotrecurse) || ($checkforblock) || (ref($possibles) eq 'HASH')) {
+                             $canaccess = 1;
+                         } else { 
+                             $canaccess = &allowed('bre',$file);
+                         }
+                         if ($canaccess) {
+         		     my ($mapid,$resid)=split(/\./,$id);
+                             if ($bighash{'map_type_'.$mapid} ne 'page') {
+                                 my $poss_syval=&encode_symb($bighash{'map_id_'.$mapid},
+						             $resid,$thisfn);
+                                 if (ref($possibles) eq 'HASH') {
+                                     $possibles->{$syval} = 1;
+                                 }
+                                 if ($checkforblock) {
+                                     my @blockers = &has_comm_blocking('bre',$poss_syval,$file);
+                                     unless (@blockers > 0) {
+                                         $syval = $poss_syval;
+                                         $realpossible++;
+                                     }
+                                 } else {
+                                     $syval = $poss_syval;
+                                     $realpossible++;
+                                 }
+                             }
 			 }
                      }
 		     if ($realpossible!=1) { $syval=''; }
@@ -10771,7 +11886,7 @@ sub symbread {
                      $syval='';
                  }
 	      }
-              untie(%bighash)
+              untie(%bighash);
            }
         }
         if ($syval) {
@@ -10924,6 +12039,7 @@ sub rndseed {
 	$which =&get_rand_alg($courseid);
     }
     if (defined(&getCODE())) {
+
 	if ($which eq '64bit5') {
 	    return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
 	} elsif ($which eq '64bit4') {
@@ -11109,8 +12225,12 @@ sub rndseed_CODE_64bit5 {
 sub setup_random_from_rndseed {
     my ($rndseed)=@_;
     if ($rndseed =~/([,:])/) {
-	my ($num1,$num2)=split(/[,:]/,$rndseed);
-	&Math::Random::random_set_seed(abs($num1),abs($num2));
+        my ($num1,$num2) = map { abs($_); } (split(/[,:]/,$rndseed));
+        if ((!$num1) || (!$num2) || ($num1 > 2147483562) || ($num2 > 2147483398)) {
+            &Math::Random::random_set_seed_from_phrase($rndseed);
+        } else {
+            &Math::Random::random_set_seed($num1,$num2);
+        }
     } else {
 	&Math::Random::random_set_seed_from_phrase($rndseed);
     }
@@ -11501,7 +12621,9 @@ sub default_login_domain {
 sub declutter {
     my $thisfn=shift;
     if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
-    $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
+    unless ($thisfn=~m{^/home/httpd/html/priv/}) {
+        $thisfn=~s{^/home/httpd/html}{};
+    }
     $thisfn=~s/^\///;
     $thisfn=~s|^adm/wrapper/||;
     $thisfn=~s|^adm/coursedocs/showdoc/||;
@@ -11544,6 +12666,8 @@ sub clutter {
 #		&logthis("Got a blank emb style");
 	    }
 	}
+    } elsif ($thisfn =~ m{^/adm/$match_domain/$match_courseid/\d+/exttools?$}) {
+        $thisfn='/adm/wrapper'.$thisfn;
     }
     return $thisfn;
 }
@@ -11628,7 +12752,7 @@ sub get_dns {
 	$alldns{$host} = $protocol;
     }
     while (%alldns) {
-	my ($dns) = keys(%alldns);
+	my ($dns) = sort { $b cmp $a } keys(%alldns);
 	my $ua=new LWP::UserAgent;
         $ua->timeout(30);
 	my $request=new HTTP::Request('GET',"$alldns{$dns}://$dns$url");
@@ -11636,9 +12760,9 @@ sub get_dns {
         delete($alldns{$dns});
 	next if ($response->is_error());
 	my @content = split("\n",$response->content);
-        unless ($nocache) {
+	unless ($nocache) {
 	    &do_cache_new('dns',$url,\@content,30*24*60*60);
-        }
+	}
 	&$func(\@content,$hashref);
 	return;
     }
@@ -11654,36 +12778,37 @@ sub get_dns {
 # ------------------------------------------------------Get DNS checksums file
 sub parse_dns_checksums_tab {
     my ($lines,$hashref) = @_;
-    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $lonhost = $perlvar{'lonHostID'};
+    my $machine_dom = &Apache::lonnet::host_domain($lonhost);
     my $loncaparev = &get_server_loncaparev($machine_dom);
+    my $distro = (split(/\:/,&get_server_distarch($lonhost)))[0];
+    my $webconfdir = '/etc/httpd/conf';
+    if ($distro =~ /^(ubuntu|debian)(\d+)$/) {
+        $webconfdir = '/etc/apache2';
+    } elsif ($distro =~ /^sles(\d+)$/) {
+        if ($1 >= 10) {
+            $webconfdir = '/etc/apache2';
+        }
+    } elsif ($distro =~ /^suse(\d+\.\d+)$/) {
+        if ($1 >= 10.0) {
+            $webconfdir = '/etc/apache2';
+        }
+    }
     my ($release,$timestamp) = split(/\-/,$loncaparev);
     my (%chksum,%revnum);
     if (ref($lines) eq 'ARRAY') {
         chomp(@{$lines});
-        my $versions = shift(@{$lines});
-        my %supported;
-        if ($versions =~ /^VERSIONS\:([\w\.\,]+)$/) {
-            my $releaseslist = $1;
-            if ($releaseslist =~ /,/) {
-                map { $supported{$_} = 1; } split(/,/,$releaseslist);
-            } elsif ($releaseslist) {
-                $supported{$releaseslist} = 1;
-            }
-        }
-        if ($supported{$release}) {
-            my $matchthis = 0;
+        my $version = shift(@{$lines});
+        if ($version eq $release) {  
             foreach my $line (@{$lines}) {
-                if ($line =~ /^(\d[\w\.]+)$/) {
-                    if ($matchthis) {
-                        last;
-                    } elsif ($1 eq $release) {
-                        $matchthis = 1;
+                my ($file,$version,$shasum) = split(/,/,$line);
+                if ($file =~ m{^/etc/httpd/conf}) {
+                    if ($webconfdir eq '/etc/apache2') {
+                        $file =~ s{^\Q/etc/httpd/conf/\E}{$webconfdir/};
                     }
-                } elsif ($matchthis) {
-                    my ($file,$version,$shasum) = split(/,/,$line);
-                    $chksum{$file} = $shasum;
-                    $revnum{$file} = $version;
                 }
+                $chksum{$file} = $shasum;
+                $revnum{$file} = $version;
             }
             if (ref($hashref) eq 'HASH') {
                 %{$hashref} = (
@@ -11698,7 +12823,10 @@ sub parse_dns_checksums_tab {
 
 sub fetch_dns_checksums {
     my %checksums;
-    &get_dns('/adm/dns/checksums',\&parse_dns_checksums_tab,1,1,
+    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $loncaparev = &get_server_loncaparev($machine_dom,$perlvar{'lonHostID'});
+    my ($release,$timestamp) = split(/\-/,$loncaparev);
+    &get_dns("/adm/dns/checksums/$release",\&parse_dns_checksums_tab,1,1,
              \%checksums);
     return \%checksums;
 }
@@ -11731,8 +12859,8 @@ 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>;
@@ -11818,8 +12946,8 @@ 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);
@@ -11841,7 +12969,8 @@ 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;
     }
@@ -11963,7 +13092,7 @@ sub fetch_dns_checksums {
     }
     
     sub get_iphost {
-	my ($ignore_cache) = @_;
+	my ($ignore_cache,$nocache) = @_;
 
 	if (!$ignore_cache) {
 	    if (%iphost) {
@@ -11987,7 +13116,7 @@ sub fetch_dns_checksums {
 	    %old_name_to_ip = %{$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{$name})) {
@@ -12012,9 +13141,11 @@ sub fetch_dns_checksums {
 	    }
 	    push(@{$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;
     }
@@ -12076,12 +13207,12 @@ sub fetch_dns_checksums {
 }
 
 sub all_loncaparevs {
-    return qw(1.1 1.2 1.3 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10);
+    return qw(1.1 1.2 1.3 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11);
 }
 
-# ------------------------------------------------------- Read loncaparev table
+# ---------------------------------------------------------- Read loncaparev table
 {
-    sub load_loncaparevs {
+    sub load_loncaparevs { 
         if (-e "$perlvar{'lonTabDir'}/loncaparevs.tab") {
             if (open(my $config,"<$perlvar{'lonTabDir'}/loncaparevs.tab")) {
                 while (my $configline=<$config>) {
@@ -12095,7 +13226,7 @@ sub all_loncaparevs {
     }
 }
 
-# ----------------------------------------------------- Read serverhostID table
+# ---------------------------------------------------------- Read serverhostID table
 {
     sub load_serverhomeIDs {
         if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
@@ -12187,11 +13318,11 @@ BEGIN {
     close($config);
 }
 
-# --------------------------------------------------------- Read loncaparev table
+# ---------------------------------------------------------- Read loncaparev table
 
 &load_loncaparevs();
 
-# ------------------------------------------------------- Read serverhostID table
+# ---------------------------------------------------------- Read serverhostID table
 
 &load_serverhomeIDs();
 
@@ -12205,7 +13336,15 @@ BEGIN {
                 my $item = $token->[1];
                 my $name = $token->[2]{'name'};
                 my $value = $token->[2]{'value'};
-                if ($item ne '' && $name ne '' && $value ne '') {
+                my $valuematch = $token->[2]{'valuematch'};
+                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} = $release;
@@ -12254,17 +13393,6 @@ $readit=1;
 	if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
 	&logthis(" Detected 64bit platform ($_64bit)");
     }
-
-    {
-        eval {
-            ($apache) =
-                (Apache2::ServerUtil::get_server_version() =~ m{Apache/(\d+\.\d+)});
-        };
-        if ($@) {
-           $apache = 1.3;
-        }
-    }
-
 }
 }
 
@@ -12406,7 +13534,7 @@ were new keys. I.E. 1:foo will become 1:
 Calling convention:
 
  my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname);
- &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname);
+ &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$laststore);
 
 For more detailed information, see lonnet specific documentation.
 
@@ -12489,10 +13617,12 @@ 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()>
@@ -12501,7 +13631,27 @@ 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()>
@@ -12542,13 +13692,29 @@ escaped strings of the action recorded i
 
 =item *
 
-allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
+allowed($priv,$uri,$symb,$role,$clientip,$noblockcheck) : check for a user privilege; 
+returns codes for allowed actions.
+
+The first argument is required, all others are optional.
+
+$priv is the privilege being checked.
+$uri contains additional information about what is being checked for access (e.g.,
+URL, course ID etc.). 
+$symb is the unique resource instance identifier in a course; if needed,
+but not provided, it will be retrieved via a call to &symbread(). 
+$role is the role for which a priv is being checked (only used if priv is evb). 
+$clientip is the user's IP address (only used when checking for access to portfolio 
+files).
+$noblockcheck, if true, skips calls to &has_comm_blocking() for the bre priv. This 
+prevents recursive calls to &allowed.
+
  F: full access
  U,I,K: authentication modes (cxx only)
  '': forbidden
  1: user needs to choose course
  2: browse allowed
  A: passphrase authentication needed
+ B: access temporarily blocked because of a blocking event in a course.
 
 =item *
 
@@ -12600,9 +13766,9 @@ provided for types, will default to retu
 =item *
 
 in_course($udom,$uname,$cdom,$cnum,$type,$hideprivileged) : determine if
-user: $uname:$udom has a role in the course: $cdom_$cnum.
+user: $uname:$udom has a role in the course: $cdom_$cnum. 
 
-Additional optional arguments are: $type (if role checking is to be restricted
+Additional optional arguments are: $type (if role checking is to be restricted 
 to certain user status types -- previous (expired roles), active (currently
 available roles) or future (roles available in the future), and
 $hideprivileged -- if true will not report course roles for users who
@@ -12673,8 +13839,8 @@ or when Autoupdate.pl is run by cron in
 modifystudent
 
 modify a student's enrollment and identification information.
-The course id is resolved based on the current users environment.  
-This means the envoking user must be a course coordinator or otherwise
+The course id is resolved based on the current user's environment.  
+This means the invoking user must be a course coordinator or otherwise
 associated with a course.
 
 This call is essentially a wrapper for lonnet::modifyuser and
@@ -12734,20 +13900,20 @@ Inputs:
 
 modify_student_enrollment
 
-Change a students enrollment status in a class.  The environment variable
+Change a student's enrollment status in a class.  The environment variable
 'role.request.course' must be defined for this function to proceed.
 
 Inputs:
 
 =over 4
 
-=item $udom, students domain
+=item $udom, student's domain
 
-=item $uname, students name
+=item $uname, student's name
 
-=item $uid, students user id
+=item $uid, student's user id
 
-=item $first, students first name
+=item $first, student's first name
 
 =item $middle
 
@@ -12773,6 +13939,8 @@ Inputs:
 
 =item $credits, number of credits student will earn from this class
 
+=item $instsec, institutional course section code for student
+
 =back
 
 
@@ -12829,7 +13997,7 @@ If defined, the supplied username is use
 resdata($name,$domain,$type,@which) : request for current parameter
 setting for a specific $type, where $type is either 'course' or 'user',
 @what should be a list of parameters to ask about. This routine caches
-answers for 5 minutes.
+answers for 10 minutes.
 
 =item *
 
@@ -12838,6 +14006,10 @@ data base, returning a hash that is keye
 values that are the resource value.  I believe that the timestamps and
 versions are also returned.
 
+get_numsuppfiles($cnum,$cdom) : retrieve number of files in a course's
+supplemental content area. This routine caches the number of files for 
+10 minutes.
+
 =back
 
 =head2 Course Modification
@@ -12938,7 +14110,20 @@ will be stored for query
 
 =item *
 
-symbread($filename) : return symbolic list entry (filename argument optional);
+symbread($filename,$donotrecurse,$ignorecachednull,$checkforblock,$possibles) : 
+return symbolic list entry (all arguments optional). 
+
+Args: filename is the filename (including path) for the file for which a symb 
+is required; donotrecurse, if true will prevent calls to allowed() being made 
+to check access status if more than one resource was found in the bighash 
+(see rev. 1.249) to avoid an infinite loop if an ambiguous resource is part of 
+a randompick); ignorecachednull, if true will prevent a symb of '' being 
+returned if $env{$cache_str} is defined as ''; checkforblock if true will
+cause possible symbs to be checked to determine if they are subject to content
+blocking, if so they will not be included as possible symbs; possibles is a
+ref to a hash, which, as a side effect, will be populated with all possible 
+symbs (content blocking not tested).
+ 
 returns the data handle
 
 =item *
@@ -12948,9 +14133,9 @@ and is a possible symb for the URL in $t
 resource that the user accessed using /enc/ returns a 1 on success, 0
 on failure, user must be in a course, as it assumes the existence of
 the course initial hash, and uses $env('request.course.id'}.  The third
-arg is an optional reference to a scalar.  If this arg is passed in the
+arg is an optional reference to a scalar.  If this arg is passed in the 
 call to symbverify, it will be set to 1 if the symb has been set to be 
-encrypted; otherwise it will be null.
+encrypted; otherwise it will be null.  
 
 =item *
 
@@ -13003,13 +14188,13 @@ expirespread($uname,$udom,$stype,$usymb)
 devalidate($symb) : devalidate temporary spreadsheet calculations,
 forcing spreadsheet to reevaluate the resource scores next time.
 
-=item *
+=item * 
 
 can_edit_resource($file,$cnum,$cdom,$resurl,$symb,$group) : determine if current user can edit a particular resource,
 when viewing in course context.
 
  input: six args -- filename (decluttered), course number, course domain,
-                    url, symb (if registered) and group (if this is a
+                    url, symb (if registered) and group (if this is a 
                     group item -- e.g., bulletin board, group page etc.).
 
  output: array of five scalars --
@@ -13017,15 +14202,15 @@ when viewing in course context.
          $home -- homeserver of resource (i.e., for author if published,
                                           or course if uploaded.).
          $switchserver --  1 if server switch will be needed.
-         $forceedit -- 1 if icon/link should be to go to edit mode
+         $forceedit -- 1 if icon/link should be to go to edit mode 
          $forceview -- 1 if icon/link should be to go to view mode
 
 =item *
 
 is_course_upload($file,$cnum,$cdom)
 
-Used in course context to determine if current file was uploaded to
-the course (i.e., would be found in /userfiles/docs on the course's
+Used in course context to determine if current file was uploaded to 
+the course (i.e., would be found in /userfiles/docs on the course's 
 homeserver.
 
   input: 3 args -- filename (decluttered), course number and course domain.
@@ -13039,15 +14224,21 @@ homeserver.
 
 =item *
 
-store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
-for this url; hashref needs to be given and should be a \%hashname; the
-remaining args aren't required and if they aren't passed or are '' they will
-be derived from the env
+store($storehash,$symb,$namespace,$udom,$uname,$laststore) : stores hash
+permanently for this url; hashref needs to be given and should be a \%hashname;
+the remaining args aren't required and if they aren't passed or are '' they will
+be derived from the env (with the exception of $laststore, which is an 
+optional arg used when a user's submission is stored in grading).
+$laststore is $version=$timestamp, where $version is the most recent version
+number retrieved for the corresponding $symb in the $namespace db file, and
+$timestamp is the timestamp for that transaction (UNIX time).
+$laststore is currently only passed when cstore() is called by 
+structuretags::finalize_storage().
 
 =item *
 
-cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
-uses critical subroutine
+cstore($storehash,$symb,$namespace,$udom,$uname,$laststore) : same as store
+but uses critical subroutine
 
 =item *
 
@@ -13070,10 +14261,11 @@ $range should be either an integer '100'
 
 =item *
 
-putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
+putstore($namespace,$symb,$version,$storehash,$udomain,$uname,$tolog) :
 replaces a &store() version of data with a replacement set of data
 for a particular resource in a namespace passed in the $storehash hash 
-reference
+reference. If $tolog is true, the transaction is logged in the courselog
+with an action=PUTSTORE.
 
 =item *
 
@@ -13183,15 +14375,91 @@ server ($udom and $uhome are optional)
 
 =item * 
 
-get_domain_defaults($target_domain) : returns hash with defaults for
-authentication and language in the domain. Keys are: auth_def, auth_arg_def,
-lang_def; corresponsing values are authentication type (internal, krb4, krb5,
-or localauth), initial password or a kerberos realm, language (e.g., en-us).
-Values are retrieved from cache (if current), or from domain's configuration.db
-(if available), or lastly from values in lonTabs/dns_domain,tab, 
-or lonTabs/domain.tab. 
+get_domain_defaults($target_domain,$ignore_cache) : returns hash with defaults 
+for: authentication, language, quotas, timezone, date locale, and portal URL in
+the target domain.
+
+May also include additional key => value pairs for the following groups:
+
+=over
+
+=item
+disk quotas (MB allocated by default to portfolios and authoring spaces).
+
+=over
+
+=item defaultquota, authorquota
+
+=back
+
+=item
+tools (availability of aboutme page, blog, webDAV access for authoring spaces,
+portfolio for users).
+
+=over
+
+=item
+aboutme, blog, webdav, portfolio
+
+=back
+
+=item
+requestcourses: ability to request courses, and how requests are processed.
+
+=over
+
+=item
+official, unofficial, community, textbook, placement
+
+=back
+
+=item
+inststatus: types of institutional affiliation, and order in which they are displayed.
+
+=over
+
+=item
+inststatustypes, inststatusorder, inststatusguest
+
+=back
+
+=item
+coursedefaults: can PDF forms can be created, default credits for courses, default quotas (MB)
+for course's uploaded content.
+
+=over
+
+=item
+canuse_pdfforms, officialcredits, unofficialcredits, textbookcredits, officialquota, unofficialquota, 
+communityquota, textbookquota, placementquota
+
+=back
+
+=item
+usersessions: set options for hosting of your users in other domains, and hosting of users from other domains
+on your servers.
+
+=over
+
+=item 
+remotesessions, hostedsessions
+
+=back
+
+=back
+
+In cases where a domain coordinator has never used the "Set Domain Configuration"
+utility to create a configuration.db file on a domain's primary library server 
+only the following domain defaults: auth_def, auth_arg_def, lang_def
+-- corresponding values are authentication type (internal, krb4, krb5,
+or localauth), initial password or a kerberos realm, language (e.g., en-us) -- 
+will be available. Values are retrieved from cache (if current), unless the
+optional $ignore_cache arg is true, or from domain's configuration.db (if available),
+or lastly from values in lonTabs/dns_domain,tab, or lonTabs/domain.tab.
+
+Typical usage:
 
-%domdefaults = &get_auth_defaults($target_domain);
+%domdefaults = &get_domain_defaults($target_domain);
 
 =back
 
@@ -13416,7 +14684,8 @@ filelocation except for hrefs
 
 =item *
 
-declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
+declutter() : declutters URLs -- remove beginning slashes, 'res' etc.
+also removes beginning /home/httpd/html unless /priv/ follows it.
 
 =back
 
@@ -13611,8 +14880,8 @@ Returns:
 
 get_timebased_id():
 
-Attempts to get a unique timestamp-based suffix for use with items added to a
-course via the Course Editor (e.g., folders, composite pages,
+Attempts to get a unique timestamp-based suffix for use with items added to a 
+course via the Course Editor (e.g., folders, composite pages, 
 group bulletin boards).
 
 Args: (first three required; six others optional)
@@ -13623,24 +14892,24 @@ Args: (first three required; six others
 2. keyid (alphanumeric): name of temporary locking key in hash,
    e.g., num, boardids
 
-3. namespace: name of gdbm file used to store suffixes already assigned;
+3. namespace: name of gdbm file used to store suffixes already assigned;  
    file will be named nohist_namespace.db
 
 4. cdom: domain of course; default is current course domain from %env
 
 5. cnum: course number; default is current course number from %env
 
-6. idtype: set to concat if an additional digit is to be appended to the
+6. idtype: set to concat if an additional digit is to be appended to the 
    unix timestamp to form the suffix, if the plain timestamp is already
-   in use.  Default is to not do this, but simply increment the unix
+   in use.  Default is to not do this, but simply increment the unix 
    timestamp by 1 until a unique key is obtained.
 
 7. who: holder of locking key; defaults to user:domain for user.
 
-8. locktries: number of attempts to obtain a lock (sleep of 1s before
+8. locktries: number of attempts to obtain a lock (sleep of 1s before 
    retrying); default is 3.
 
-9. maxtries: number of attempts to obtain a unique suffix; default is 20.
+9. maxtries: number of attempts to obtain a unique suffix; default is 20.  
 
 Returns: