--- loncom/lonnet/perl/lonnet.pm	2012/05/18 20:16:48	1.1171
+++ loncom/lonnet/perl/lonnet.pm	2013/12/27 23:31:21	1.1172.2.37
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1171 2012/05/18 20:16:48 droeschl Exp $
+# $Id: lonnet.pm,v 1.1172.2.37 2013/12/27 23:31:21 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -109,31 +109,33 @@ require Exporter;
 our @ISA = qw (Exporter);
 our @EXPORT = qw(%env);
 
-
-# --------------------------------------------------------------------- Logging
+# ------------------------------------ Logging (parameters, docs, slots, roles)
 {
     my $logid;
-    sub instructor_log {
-	my ($hash_name,$storehash,$delflag,$uname,$udom,$cnum,$cdom)=@_;
-        if (($cnum eq '') || ($cdom eq '')) {
-            $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-            $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    sub write_log {
+	my ($context,$hash_name,$storehash,$delflag,$uname,$udom,$cnum,$cdom)=@_;
+        if ($context eq 'course') {
+            if (($cnum eq '') || ($cdom eq '')) {
+                $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            }
         }
-	$logid++;
+	$logid ++;
         my $now = time();
 	my $id=$now.'00000'.$$.'00000'.$logid;
-	return &Apache::lonnet::put('nohist_'.$hash_name,
-				    { $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'      => $udom,
-				    }
-				  },$cdom,$cnum);
+        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);
     }
 }
 
@@ -350,9 +352,11 @@ sub get_remote_globals {
 }
 
 sub remote_devalidate_cache {
-    my ($lonhost,$name,$id) = @_;
-    my $response = &reply('devalidatecache:'.&escape($name).':'.&escape($id),$lonhost);
-    return $response;
+    my ($lonhost,$cachekeys) = @_;
+    my $items;
+    return unless (ref($cachekeys) eq 'ARRAY');
+    my $cachestr = join('&',@{$cachekeys});
+    return &reply('devalidatecache:'.&escape($cachestr),$lonhost);
 }
 
 # -------------------------------------------------- Non-critical communication
@@ -597,7 +601,7 @@ 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 '') {
         $name = 'lonID';
@@ -628,6 +632,12 @@ sub check_for_valid_session {
 	|| !defined($disk_env{'user.domain'})) {
 	return undef;
     }
+
+    if (ref($userhashref) eq 'HASH') {
+        $userhashref->{'name'} = $disk_env{'user.name'};
+        $userhashref->{'domain'} = $disk_env{'user.domain'};
+    }
+
     return $handle;
 }
 
@@ -1234,9 +1244,10 @@ sub get_lonbalancer_config {
 
 sub check_loadbalancing {
     my ($uname,$udom) = @_;
-    my ($is_balancer,$dom_in_use,$homeintdom,$rule_in_effect,
-        $offloadto,$otherserver);
+    my ($is_balancer,$currtargets,$currrules,$dom_in_use,$homeintdom,
+        $rule_in_effect,$offloadto,$otherserver);
     my $lonhost = $perlvar{'lonHostID'};
+    my @hosts = &current_machine_ids();
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
     my $uintdom = &Apache::lonnet::internet_dom($uprimary_id);
     my $intdom = &Apache::lonnet::internet_dom($lonhost);
@@ -1259,15 +1270,8 @@ sub check_loadbalancing {
         }
     }
     if (ref($result) eq 'HASH') {
-        my $currbalancer = $result->{'lonhost'};
-        my $currtargets = $result->{'targets'};
-        my $currrules = $result->{'rules'};
-        if ($currbalancer ne '') {
-            my @hosts = &current_machine_ids();
-            if (grep(/^\Q$currbalancer\E$/,@hosts)) {
-                $is_balancer = 1;
-            }
-        }
+        ($is_balancer,$currtargets,$currrules) =
+            &check_balancer_result($result,@hosts);
         if ($is_balancer) {
             if (ref($currrules) eq 'HASH') {
                 if ($homeintdom) {
@@ -1316,7 +1320,7 @@ 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'],$serverhomedom);
@@ -1325,12 +1329,9 @@ sub check_loadbalancing {
             }
         }
         if (ref($result) eq 'HASH') {
-            my $currbalancer = $result->{'lonhost'};
-            my $currtargets = $result->{'targets'};
-            my $currrules = $result->{'rules'};
-
-            if ($currbalancer eq $lonhost) {
-                $is_balancer = 1;
+            ($is_balancer,$currtargets,$currrules) =
+                &check_balancer_result($result,@hosts);
+            if ($is_balancer) {
                 if (ref($currrules) eq 'HASH') {
                     if ($currrules->{'_LC_internetdom'} ne '') {
                         $rule_in_effect = $currrules->{'_LC_internetdom'};
@@ -1351,41 +1352,81 @@ sub check_loadbalancing {
             $offloadto = &this_host_spares($dom_in_use);
         }
     }
-    my $lowest_load = 30000;
-    if (ref($offloadto) eq 'HASH') {
-        if (ref($offloadto->{'primary'}) eq 'ARRAY') {
-            foreach my $try_server (@{$offloadto->{'primary'}}) {
-                ($otherserver,$lowest_load) =
-                    &compare_server_load($try_server,$otherserver,$lowest_load);
+    if ($is_balancer) {
+        my $lowest_load = 30000;
+        if (ref($offloadto) eq 'HASH') {
+            if (ref($offloadto->{'primary'}) eq 'ARRAY') {
+                foreach my $try_server (@{$offloadto->{'primary'}}) {
+                    ($otherserver,$lowest_load) =
+                        &compare_server_load($try_server,$otherserver,$lowest_load);
+                }
             }
-        }
-        my $found_server = ($otherserver ne '' && $lowest_load < 100);
+            my $found_server = ($otherserver ne '' && $lowest_load < 100);
 
-        if (!$found_server) {
-            if (ref($offloadto->{'default'}) eq 'ARRAY') {
-                foreach my $try_server (@{$offloadto->{'default'}}) {
+            if (!$found_server) {
+                if (ref($offloadto->{'default'}) eq 'ARRAY') {
+                    foreach my $try_server (@{$offloadto->{'default'}}) {
+                        ($otherserver,$lowest_load) =
+                            &compare_server_load($try_server,$otherserver,$lowest_load);
+                    }
+                }
+            }
+        } elsif (ref($offloadto) eq 'ARRAY') {
+            if (@{$offloadto} == 1) {
+                $otherserver = $offloadto->[0];
+            } elsif (@{$offloadto} > 1) {
+                foreach my $try_server (@{$offloadto}) {
                     ($otherserver,$lowest_load) =
                         &compare_server_load($try_server,$otherserver,$lowest_load);
                 }
             }
         }
-    } elsif (ref($offloadto) eq 'ARRAY') {
-        if (@{$offloadto} == 1) {
-            $otherserver = $offloadto->[0];
-        } elsif (@{$offloadto} > 1) {
-            foreach my $try_server (@{$offloadto}) {
-                ($otherserver,$lowest_load) =
-                    &compare_server_load($try_server,$otherserver,$lowest_load);
+        if (($otherserver ne '') && (grep(/^\Q$otherserver\E$/,@hosts))) {
+            $is_balancer = 0;
+            if ($uname ne '' && $udom ne '') {
+                if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
+
+                    &appenv({'user.loadbalexempt'     => $lonhost,
+                             'user.loadbalcheck.time' => time});
+                }
             }
         }
     }
     return ($is_balancer,$otherserver);
 }
 
+sub check_balancer_result {
+    my ($result,@hosts) = @_;
+    my ($is_balancer,$currtargets,$currrules);
+    if (ref($result) eq 'HASH') {
+        if ($result->{'lonhost'} ne '') {
+            my $currbalancer = $result->{'lonhost'};
+            if (grep(/^\Q$currbalancer\E$/,@hosts)) {
+                $is_balancer = 1;
+                $currtargets = $result->{'targets'};
+                $currrules = $result->{'rules'};
+            }
+        } else {
+            foreach my $key (keys(%{$result})) {
+                if (($key ne '') && (grep(/^\Q$key\E$/,@hosts)) &&
+                    (ref($result->{$key}) eq 'HASH')) {
+                    $is_balancer = 1;
+                    $currrules = $result->{$key}{'rules'};
+                    $currtargets = $result->{$key}{'targets'};
+                    last;
+                }
+            }
+        }
+    }
+    return ($is_balancer,$currtargets,$currrules);
+}
+
 sub get_loadbalancer_targets {
     my ($rule_in_effect,$currtargets,$uname,$udom) = @_;
     my $offloadto;
-    if ($rule_in_effect eq '') {
+    if ($rule_in_effect eq 'none') {
+        return [$perlvar{'lonHostID'}];
+    } elsif ($rule_in_effect eq '') {
         $offloadto = $currtargets;
     } else {
         if ($rule_in_effect eq 'homeserver') {
@@ -1403,7 +1444,7 @@ sub get_loadbalancer_targets {
                     }
                 }
             } else {
-                my %servers = &dom_servers($udom);
+                my %servers = &internet_dom_servers($udom);
                 my ($remotebalancer,$remotetargets) = &get_lonbalancer_config(\%servers);
                 if (&hostname($remotebalancer) ne '') {
                     $offloadto = [$remotebalancer];
@@ -1534,6 +1575,36 @@ sub idput {
     }
 }
 
+# ---------------------------------------- Delete unwanted IDs from ids.db file
+
+sub iddel {
+    my ($udom,$idshashref,$uhome)=@_;
+    my %result=();
+    unless (ref($idshashref) eq 'HASH') {
+        return %result;
+    }
+    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}) {
+                $servers{$uhom}.='&'.&escape($id);
+            } else {
+                $servers{$uhom}=&escape($id);
+            }
+        }
+    }
+    foreach my $server (keys(%servers)) {
+        $result{$server} = &critical('iddel:'.$udom.':'.$servers{$server},$uhome);
+    }
+    return %result;
+}
+
 # ------------------------------dump from db file owned by domainconfig user
 sub dump_dom {
     my ($namespace, $udom, $regexp) = @_;
@@ -1910,19 +1981,23 @@ 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;
     my %domconfig =
          &Apache::lonnet::get_dom('configuration',['defaults','quotas',
                                   'requestcourses','inststatus',
-                                  'coursedefaults','usersessions'],$domain);
+                                  'coursedefaults','usersessions',
+                                  'requestauthor'],$domain);
     if (ref($domconfig{'defaults'}) eq 'HASH') {
         $domdefaults{'lang_def'} = $domconfig{'defaults'}{'lang_def'}; 
         $domdefaults{'auth_def'} = $domconfig{'defaults'}{'auth_def'};
@@ -1940,27 +2015,41 @@ sub get_domain_defaults {
             $domdefaults{'defaultquota'} = $domconfig{'quotas'}{'defaultquota'};
         } else {
             $domdefaults{'defaultquota'} = $domconfig{'quotas'};
-        } 
-        my @usertools = ('aboutme','blog','portfolio');
+        }
+        my @usertools = ('aboutme','blog','webdav','portfolio');
         foreach my $item (@usertools) {
             if (ref($domconfig{'quotas'}{$item}) eq 'HASH') {
                 $domdefaults{$item} = $domconfig{'quotas'}{$item};
             }
         }
+        if (ref($domconfig{'quotas'}{'authorquota'}) eq 'HASH') {
+            $domdefaults{'authorquota'} = $domconfig{'quotas'}{'authorquota'};
+        }
     }
     if (ref($domconfig{'requestcourses'}) eq 'HASH') {
-        foreach my $item ('official','unofficial','community') {
+        foreach my $item ('official','unofficial','community','textbook') {
             $domdefaults{$item} = $domconfig{'requestcourses'}{$item};
         }
     }
+    if (ref($domconfig{'requestauthor'}) eq 'HASH') {
+        $domdefaults{'requestauthor'} = $domconfig{'requestauthor'};
+    }
     if (ref($domconfig{'inststatus'}) eq 'HASH') {
         foreach my $item ('inststatustypes','inststatusorder') {
             $domdefaults{$item} = $domconfig{'inststatus'}{$item};
         }
     }
     if (ref($domconfig{'coursedefaults'}) eq 'HASH') {
-        foreach my $item ('canuse_pdfforms') {
-            $domdefaults{$item} = $domconfig{'coursedefaults'}{$item};
+        if (ref($domconfig{'coursedefaults'}{'coursecredits'}) eq 'HASH') {
+            $domdefaults{'officialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'official'};
+            $domdefaults{'unofficialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'unofficial'};
+            $domdefaults{'textbookcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'textbook'};
+        }
+        if (ref($domconfig{'coursedefaults'}{'uploadquota'}) eq 'HASH') {
+            $domdefaults{'officialquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'official'};
+            $domdefaults{'unofficialquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'unofficial'};
+            $domdefaults{'communityquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'community'};
+            $domdefaults{'textbookquota'} = $domconfig{'coursedefaults'}{'uploadquota'}{'textbook'};
         }
     }
     if (ref($domconfig{'usersessions'}) eq 'HASH') {
@@ -1971,8 +2060,7 @@ sub get_domain_defaults {
             $domdefaults{'hostedsessions'} = $domconfig{'usersessions'}{'hosted'};
         }
     }
-    &Apache::lonnet::do_cache_new('domdefaults',$domain,\%domdefaults,
-                                  $cachetime);
+    &do_cache_new('domdefaults',$domain,\%domdefaults,$cachetime);
     return %domdefaults;
 }
 
@@ -2382,7 +2470,7 @@ sub chatsend {
 
 sub getversion {
     my $fname=&clutter(shift);
-    unless ($fname=~/^\/res\//) { return -1; }
+    unless ($fname=~m{^(/adm/wrapper|)/res/}) { return -1; }
     return &currentversion(&filelocation('',$fname));
 }
 
@@ -2568,8 +2656,7 @@ sub ssi {
     }
 
     $request->header(Cookie => $ENV{'HTTP_COOKIE'});
-    my $response=$ua->request($request);
-
+    my $response= $ua->request($request);
     if (wantarray) {
 	return ($response->content, $response);
     } else {
@@ -2602,6 +2689,264 @@ sub allowuploaded {
     &Apache::lonnet::appenv(\%httpref);
 }
 
+#
+# 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
+#     Functions.
+# (b) When displaying folder contents in course editor, used to determine if
+#     "Edit" link will be displayed alongside resource.
+#
+#  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 --
+#          $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
+#          $forceview -- 1 if icon/link should be to go to view mode
+#
+
+sub can_edit_resource {
+    my ($file,$cnum,$cdom,$resurl,$symb,$group) = @_;
+    my ($cfile,$home,$switchserver,$forceedit,$forceview,$uploaded,$incourse);
+#
+# For aboutme pages user can only edit his/her own.
+#
+    if ($resurl =~ m{^/?adm/($match_domain)/($match_username)/aboutme$}) {
+        my ($sdom,$sname) = ($1,$2);
+        if (($sdom eq $env{'user.domain'}) && ($sname eq $env{'user.name'})) {
+            $home = $env{'user.home'};
+            $cfile = $resurl;
+            if ($env{'form.forceedit'}) {
+                $forceview = 1;
+            } else {
+                $forceedit = 1;
+            }
+            return ($cfile,$home,$switchserver,$forceedit,$forceview);
+        } else {
+            return;
+        }
+    }
+
+    if ($env{'request.course.id'}) {
+        my $crsedit = &Apache::lonnet::allowed('mdc',$env{'request.course.id'});
+        if ($group ne '') {
+# if this is a group homepage or group bulletin board, check group privs
+            my $allowed = 0;
+            if ($resurl =~ m{^/?adm/$cdom/$cnum/$group/smppg$}) {
+                if ((&allowed('mdg',$env{'request.course.id'}.
+                              ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) ||
+                        (&allowed('mgh',$env{'request.course.id'}.'/'.$group)) || $crsedit) {
+                    $allowed = 1;
+                }
+            } elsif ($resurl =~ m{^/?adm/$cdom/$cnum/\d+/bulletinboard$}) {
+                if ((&allowed('mdg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) ||
+                        (&allowed('cgb',$env{'request.course.id'}.'/'.$group)) || $crsedit) {
+                    $allowed = 1;
+                }
+            }
+            if ($allowed) {
+                $home=&homeserver($cnum,$cdom);
+                if ($env{'form.forceedit'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = $resurl;
+            } else {
+                return;
+            }
+        } else {
+            if ($resurl =~ m{^/?adm/viewclasslist$}) {
+                unless (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+                    return;
+                }
+            } elsif (!$crsedit) {
+#
+# No edit allowed where CC has switched to student role.
+#
+                return;
+            }
+        }
+    }
+
+    if ($file ne '') {
+        if (($cnum =~ /$match_courseid/) && ($cdom =~ /$match_domain/)) {
+            if (&is_course_upload($file,$cnum,$cdom)) {
+                $uploaded = 1;
+                $incourse = 1;
+                if ($file =~/\.(htm|html|css|js|txt)$/) {
+                    $cfile = &hreflocation('',$file);
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                }
+            } elsif ($resurl =~ m{^/public/$cdom/$cnum/syllabus}) {
+                $incourse = 1;
+                if ($env{'form.forceedit'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = $resurl;
+            } elsif (($resurl ne '') && (&is_on_map($resurl))) {
+                if ($resurl =~ m{^/adm/$match_domain/$match_username/\d+/smppg|bulletinboard$}) {
+                    $incourse = 1;
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                    $cfile = $resurl;
+                } elsif ($resurl eq '/res/lib/templates/simpleproblem.problem') {
+                    $incourse = 1;
+                    $cfile = $resurl.'/smpedit';
+                } elsif ($resurl =~ m{^/adm/wrapper/ext/}) {
+                    $incourse = 1;
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                    $cfile = $resurl;
+                } elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
+                    $incourse = 1;
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                    $cfile = ($resurl =~ m{^/} ? $resurl : "/$resurl");
+                }
+            } elsif ($resurl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
+                my $template = '/res/lib/templates/simpleproblem.problem';
+                if (&is_on_map($template)) {
+                    $incourse = 1;
+                    $forceview = 1;
+                    $cfile = $template;
+                }
+            } elsif (($resurl =~ m{^/adm/wrapper/ext/}) && ($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;
+                $forceview = 1;
+                if ($symb) {
+                    my ($map,$id,$res)=&decode_symb($symb);
+                    $env{'request.symb'} = $symb;
+                    $cfile = &clutter($res);
+                } else {
+                    $cfile = $env{'form.suppurl'};
+                    $cfile =~ s{^http://}{};
+                    $cfile = '/adm/wrapper/ext/'.$cfile;
+                }
+            } elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
+                if ($env{'form.forceedit'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = ($resurl =~ m{^/} ? $resurl : "/$resurl");
+            }
+        }
+        if ($uploaded || $incourse) {
+            $home=&homeserver($cnum,$cdom);
+        } elsif ($file !~ m{/$}) {
+            $file=~s{^(priv/$match_domain/$match_username)}{/$1};
+            $file=~s{^($match_domain/$match_username)}{/priv/$1};
+            # Check that the user has permission to edit this resource
+            my $setpriv = 1;
+            my ($cfuname,$cfudom)=&constructaccess($file,$setpriv);
+            if (defined($cfudom)) {
+                $home=&homeserver($cfuname,$cfudom);
+                $cfile=$file;
+            }
+        }
+        if (($cfile ne '') && (!$incourse || $uploaded) &&
+            (($home ne '') && ($home ne 'no_host'))) {
+            my @ids=&current_machine_ids();
+            unless (grep(/^\Q$home\E$/,@ids)) {
+                $switchserver=1;
+            }
+        }
+    }
+    return ($cfile,$home,$switchserver,$forceedit,$forceview);
+}
+
+sub is_course_upload {
+    my ($file,$cnum,$cdom) = @_;
+    my $uploadpath = &LONCAPA::propath($cdom,$cnum);
+    $uploadpath =~ s{^\/}{};
+    if (($file =~ m{^\Q$uploadpath\E/userfiles/(docs|supplemental)/}) ||
+        ($file =~ m{^userfiles/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/})) {
+        return 1;
+    }
+    return;
+}
+
+sub in_course {
+    my ($udom,$uname,$cdom,$cnum,$type,$hideprivileged) = @_;
+    if ($hideprivileged) {
+        my $skipuser;
+        my %coursehash = &coursedescription($cdom.'_'.$cnum);
+        my @possdoms = ($cdom);
+        if ($coursehash{'checkforpriv'}) {
+            push(@possdoms,split(/,/,$coursehash{'checkforpriv'}));
+        }
+        if (&privileged($uname,$udom,\@possdoms)) {
+            $skipuser = 1;
+            if ($coursehash{'nothideprivileged'}) {
+                foreach my $item (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
+                    my $user;
+                    if ($item =~ /:/) {
+                        $user = $item;
+                    } else {
+                        $user = join(':',split(/[\@]/,$item));
+                    }
+                    if ($user eq $uname.':'.$udom) {
+                        undef($skipuser);
+                        last;
+                    }
+                }
+            }
+            if ($skipuser) {
+                return 0;
+            }
+        }
+    }
+    $type ||= 'any';
+    if (!defined($cdom) || !defined($cnum)) {
+        my $cid  = $env{'request.course.id'};
+        $cdom = $env{'course.'.$cid.'.domain'};
+        $cnum = $env{'course.'.$cid.'.num'};
+    }
+    my $typesref;
+    if (($type eq 'any') || ($type eq 'all')) {
+        $typesref = ['active','previous','future'];
+    } elsif ($type eq 'previous' || $type eq 'future') {
+        $typesref = [$type];
+    }
+    my %roles = &get_my_roles($uname,$udom,'userroles',
+                              $typesref,undef,[$cdom]);
+    my ($tmp) = keys(%roles);
+    return 0 if ($tmp =~ /^(con_lost|error|no_such_host)/i);
+    my @course_roles = grep(/^\Q$cnum\E:\Q$cdom\E:/, keys(%roles));
+    if (@course_roles > 0) {
+        return 1;
+    }
+    return 0;
+}
+
 # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
 # input: action, courseID, current domain, intended
 #        path to file, source of file, instruction to parse file for objects,
@@ -2892,7 +3237,9 @@ sub userfileupload {
 					 $codebase,$thumbwidth,$thumbheight,
                                          $resizewidth,$resizeheight,$context,$mimetype);
         } else {
-            $fname=$env{'form.folder'}.'/'.$fname;
+            if ($env{'form.folder'}) {
+                $fname=$env{'form.folder'}.'/'.$fname;
+            }
             return &process_coursefile('uploaddoc',$docuname,$docudom,
 				       $fname,$formname,$parser,
 				       $allfiles,$codebase,$mimetype);
@@ -2907,7 +3254,7 @@ sub userfileupload {
     } else {
         my $docuname=$env{'user.name'};
         my $docudom=$env{'user.domain'};
-        if (exists($env{'form.group'})) {
+        if ((exists($env{'form.group'})) || ($context eq 'syllabus')) {
             $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
             $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
         }
@@ -3057,7 +3404,9 @@ sub extract_embedded_items {
 		&add_filetype($allfiles,$attr->{'src'},'src');
 	    }
 	    if (lc($tagname) eq 'a') {
-		&add_filetype($allfiles,$attr->{'href'},'href');
+                unless (($attr->{'href'} =~ /^#/) || ($attr->{'href'} eq '')) {
+		    &add_filetype($allfiles,$attr->{'href'},'href');
+                }
 	    }
             if (lc($tagname) eq 'script') {
                 my $src;
@@ -3145,8 +3494,26 @@ sub extract_embedded_items {
                     }
                 }
 	    }
+            if (lc($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]);
@@ -3511,38 +3878,70 @@ sub userrolelog {
 
 sub courserolelog {
     my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$selfenroll,$context)=@_;
-    if (($trole eq 'cc') || ($trole eq 'in') ||
-        ($trole eq 'ep') || ($trole eq 'ad') ||
-        ($trole eq 'ta') || ($trole eq 'st') ||
-        ($trole=~/^cr/) || ($trole eq 'gr') ||
-        ($trole eq 'co')) {
-        if ($area =~ m-^/($match_domain)/($match_courseid)/?([^/]*)-) {
-            my $cdom = $1;
-            my $cnum = $2;
-            my $sec = $3;
-            my $namespace = 'rolelog';
-            my %storehash = (
-                               role    => $trole,
-                               start   => $tstart,
-                               end     => $tend,
-                               selfenroll => $selfenroll,
-                               context    => $context,
-                            );
-            if ($trole eq 'gr') {
-                $namespace = 'groupslog';
-                $storehash{'group'} = $sec;
-            } else {
-                $storehash{'section'} = $sec;
-            }
-            &instructor_log($namespace,\%storehash,$delflag,$username,$domain,$cnum,$cdom);
-            if (($trole ne 'st') || ($sec ne '')) {
-                &devalidate_cache_new('getcourseroles',$cdom.'_'.$cnum);
-            }
+    if ($area =~ m-^/($match_domain)/($match_courseid)/?([^/]*)-) {
+        my $cdom = $1;
+        my $cnum = $2;
+        my $sec = $3;
+        my $namespace = 'rolelog';
+        my %storehash = (
+                           role    => $trole,
+                           start   => $tstart,
+                           end     => $tend,
+                           selfenroll => $selfenroll,
+                           context    => $context,
+                        );
+        if ($trole eq 'gr') {
+            $namespace = 'groupslog';
+            $storehash{'group'} = $sec;
+        } else {
+            $storehash{'section'} = $sec;
+        }
+        &write_log('course',$namespace,\%storehash,$delflag,$username,
+                   $domain,$cnum,$cdom);
+        if (($trole ne 'st') || ($sec ne '')) {
+            &devalidate_cache_new('getcourseroles',$cdom.'_'.$cnum);
         }
     }
     return;
 }
 
+sub domainrolelog {
+    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$context)=@_;
+    if ($area =~ m{^/($match_domain)/$}) {
+        my $cdom = $1;
+        my $domconfiguser = &Apache::lonnet::get_domainconfiguser($cdom);
+        my $namespace = 'rolelog';
+        my %storehash = (
+                           role    => $trole,
+                           start   => $tstart,
+                           end     => $tend,
+                           context => $context,
+                        );
+        &write_log('domain',$namespace,\%storehash,$delflag,$username,
+                   $domain,$domconfiguser,$cdom);
+    }
+    return;
+
+}
+
+sub coauthorrolelog {
+    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$context)=@_;
+    if ($area =~ m{^/($match_domain)/($match_username)$}) {
+        my $audom = $1;
+        my $auname = $2;
+        my $namespace = 'rolelog';
+        my %storehash = (
+                           role    => $trole,
+                           start   => $tstart,
+                           end     => $tend,
+                           context => $context,
+                        );
+        &write_log('author',$namespace,\%storehash,$delflag,$username,
+                   $domain,$auname,$audom);
+    }
+    return;
+}
+
 sub get_course_adv_roles {
     my ($cid,$codes) = @_;
     $cid=$env{'request.course.id'} unless (defined($cid));
@@ -3556,6 +3955,10 @@ sub get_course_adv_roles {
             $nothide{$user}=1;
         }
     }
+    my @possdoms = ($coursehash{'domain'});
+    if ($coursehash{'checkforpriv'}) {
+        push(@possdoms,split(/,/,$coursehash{'checkforpriv'}));
+    }
     my %returnhash=();
     my %dumphash=
             &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
@@ -3568,20 +3971,7 @@ sub get_course_adv_roles {
         if (($tstart) && ($now<$tstart)) { next; }
         my ($role,$username,$domain,$section)=split(/\:/,$entry);
 	if ($username eq '' || $domain eq '') { next; }
-        unless (ref($privileged{$domain}) eq 'HASH') {
-            my %dompersonnel =
-                &Apache::lonnet::get_domain_roles($domain,['dc'],$now,$now);
-            $privileged{$domain} = {};
-            foreach my $server (keys(%dompersonnel)) {
-                if (ref($dompersonnel{$server}) eq 'HASH') {
-                    foreach my $user (keys(%{$dompersonnel{$server}})) {
-                        my ($trole,$uname,$udom) = split(/:/,$user);
-                        $privileged{$udom}{$uname} = 1;
-                    }
-                }
-            }
-        }
-        if ((exists($privileged{$domain}{$username})) && 
+        if ((&privileged($username,$domain,\@possdoms)) &&
             (!$nothide{$username.':'.$domain})) { next; }
 	if ($role eq 'cr') { next; }
         if ($codes) {
@@ -3612,8 +4002,7 @@ sub get_my_roles {
     if ($context eq 'userroles') {
         %dumphash = &dump('roles',$udom,$uname);
     } else {
-        %dumphash=
-            &dump('nohist_userroles',$udom,$uname);
+        %dumphash = &dump('nohist_userroles',$udom,$uname);
         if ($hidepriv) {
             my %coursehash=&coursedescription($udom.'_'.$uname);
             foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
@@ -3655,7 +4044,7 @@ sub get_my_roles {
         }
         my ($rolecode,$username,$domain,$section,$area);
         if ($context eq 'userroles') {
-            ($area,$rolecode) = split(/_/,$entry);
+            ($area,$rolecode) = ($entry =~ /^(.+)_([^_]+)$/);
             (undef,$domain,$username,$section) = split(/\//,$area);
         } else {
             ($role,$username,$domain,$section) = split(/\:/,$entry);
@@ -3681,28 +4070,15 @@ sub get_my_roles {
             }
         }
         if ($hidepriv) {
+            my @privroles = ('dc','su');
             if ($context eq 'userroles') {
-                if ((&privileged($username,$domain)) &&
-                    (!$nothide{$username.':'.$domain})) {
-                    next;
-                }
+                next if (grep(/^\Q$role\E$/,@privroles));
             } else {
-                unless (ref($privileged{$domain}) eq 'HASH') {
-                    my %dompersonnel =
-                        &Apache::lonnet::get_domain_roles($domain,['dc'],$now,$now);
-                    $privileged{$domain} = {};
-                    if (keys(%dompersonnel)) {
-                        foreach my $server (keys(%dompersonnel)) {
-                            if (ref($dompersonnel{$server}) eq 'HASH') {
-                                foreach my $user (keys(%{$dompersonnel{$server}})) {
-                                    my ($trole,$uname,$udom) = split(/:/,$user);
-                                    $privileged{$udom}{$uname} = $trole;
-                                }
-                            }
-                        }
-                    }
+                my $possdoms = [$domain];
+                if (ref($roledoms) eq 'ARRAY') {
+                   push(@{$possdoms},@{$roledoms});
                 }
-                if (exists($privileged{$domain}{$username})) {
+                if (&privileged($username,$domain,$possdoms,\@privroles)) {
                     if (!$nothide{$username.':'.$domain}) {
                         next;
                     }
@@ -3806,18 +4182,32 @@ sub courseiddump {
 
 	    if (($domfilter eq '') ||
 		(&host_domain($tryserver) eq $domfilter)) {
-                my $rep = 
-                  &reply('courseiddump:'.&host_domain($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,
-                         $tryserver);
+                my $rep;
+                if (grep { $_ eq $tryserver } &current_machine_ids()) {
+                    $rep = &LONCAPA::Lond::dump_course_id_handler(
+                        join(":", (&host_domain($tryserver), $sincefilter,
+                                &escape($descfilter), &escape($instcodefilter),
+                                &escape($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)));
+                } else {
+                    $rep = &reply('courseiddump:'.&host_domain($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,
+                             $tryserver);
+                }
+
                 my @pairs=split(/\&/,$rep);
                 foreach my $item (@pairs) {
                     my ($key,$value)=split(/\=/,$item,2);
@@ -3923,7 +4313,7 @@ sub get_domain_roles {
     }
     my $rolelist;
     if (ref($roles) eq 'ARRAY') {
-        $rolelist = join(':',@{$roles});
+        $rolelist = join('&',@{$roles});
     }
     my %personnel = ();
 
@@ -3959,7 +4349,7 @@ my $cachedtime=();
 sub load_all_first_access {
     my ($uname,$udom)=@_;
     if (($cachedkey eq $uname.':'.$udom) &&
-        (abs($cachedtime-time)<5)) {
+        (abs($cachedtime-time)<5) && (!$env{'form.markaccess'})) {
         return;
     }
     $cachedtime=time;
@@ -4016,6 +4406,92 @@ sub set_first_access {
     return 'already_set';
 }
 }
+
+sub checkout {
+    my ($symb,$tuname,$tudom,$tcrsid)=@_;
+    my $now=time;
+    my $lonhost=$perlvar{'lonHostID'};
+    my $infostr=&escape(
+                 'CHECKOUTTOKEN&'.
+                 $tuname.'&'.
+                 $tudom.'&'.
+                 $tcrsid.'&'.
+                 $symb.'&'.
+                 $now.'&'.$ENV{'REMOTE_ADDR'});
+    my $token=&reply('tmpput:'.$infostr,$lonhost);
+    if ($token=~/^error\:/) {
+        &logthis("<font color=\"blue\">WARNING: ".
+                "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
+                 "</font>");
+        return '';
+    }
+
+    $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
+    $token=~tr/a-z/A-Z/;
+
+    my %infohash=('resource.0.outtoken' => $token,
+                  'resource.0.checkouttime' => $now,
+                  'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
+
+    unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
+       return '';
+    } else {
+        &logthis("<font color=\"blue\">WARNING: ".
+                "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
+                 "</font>");
+    }
+
+    if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
+                         &escape('Checkout '.$infostr.' - '.
+                                                 $token)) ne 'ok') {
+        return '';
+    } else {
+        &logthis("<font color=\"blue\">WARNING: ".
+                "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
+                 "</font>");
+    }
+    return $token;
+}
+
+# ------------------------------------------------------------ Check in an item
+
+sub checkin {
+    my $token=shift;
+    my $now=time;
+    my ($ta,$tb,$lonhost)=split(/\*/,$token);
+    $lonhost=~tr/A-Z/a-z/;
+    my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
+    $dtoken=~s/\W/\_/g;
+    my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
+                 split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
+
+    unless (($tuname) && ($tudom)) {
+        &logthis('Check in '.$token.' ('.$dtoken.') failed');
+        return '';
+    }
+
+    unless (&allowed('mgr',$tcrsid)) {
+        &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
+                 $env{'user.name'}.' - '.$env{'user.domain'});
+        return '';
+    }
+
+    my %infohash=('resource.0.intoken' => $token,
+                  'resource.0.checkintime' => $now,
+                  'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
+
+    unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
+       return '';
+    }
+
+    if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
+                         &escape('Checkin - '.$token)) ne 'ok') {
+        return '';
+    }
+
+    return ($symb,$tuname,$tudom,$tcrsid);
+}
+
 # --------------------------------------------- Set Expire Date for Spreadsheet
 
 sub expirespread {
@@ -4465,9 +4941,12 @@ sub restore {
     if ($stuname) { $home=&homeserver($stuname,$domain); }
 
     if (!$symb) {
-      unless ($symb=escape(&symbread())) { return ''; }
+        return if ($namespace eq 'courserequests');
+        unless ($symb=escape(&symbread())) { return ''; }
     } else {
-      $symb=&escape(&symbclean($symb));
+        unless ($namespace eq 'courserequests') {
+            $symb=&escape(&symbclean($symb));
+        }
     }
     if (!$namespace) { 
        unless ($namespace=$env{'request.course.id'}) { 
@@ -4602,22 +5081,95 @@ sub update_released_required {
 # -------------------------------------------------See if a user is privileged
 
 sub privileged {
-    my ($username,$domain)=@_;
-
-    my %rolesdump = &dump("roles", $domain, $username) or return 0;
+    my ($username,$domain,$possdomains,$possroles)=@_;
     my $now = time;
+    my $roles;
+    if (ref($possroles) eq 'ARRAY') {
+        $roles = $possroles;
+    } else {
+        $roles = ['dc','su'];
+    }
+    if (ref($possdomains) eq 'ARRAY') {
+        my %privileged = &privileged_by_domain($possdomains,$roles);
+        foreach my $dom (@{$possdomains}) {
+            if (($username =~ /^$match_username$/) && ($domain =~ /^$match_domain$/) &&
+                (ref($privileged{$dom}) eq 'HASH')) {
+                foreach my $role (@{$roles}) {
+                    if (ref($privileged{$dom}{$role}) eq 'HASH') {
+                        if (exists($privileged{$dom}{$role}{$username.':'.$domain})) {
+                            my ($end,$start) = split(/:/,$privileged{$dom}{$role}{$username.':'.$domain});
+                            return 1 unless (($end && $end < $now) ||
+                                             ($start && $start > $now));
+                        }
+                    }
+                }
+            }
+        }
+    } else {
+        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(/_/, $role);
-            if (($trole eq 'dc') || ($trole eq 'su')) {
-                return 1 unless ($tend && $tend < $now) 
-                    or ($tstart && $tstart > $now);
+            if (grep(/^\Q$trole\E$/,@{$roles})) {
+                return 1 unless ($tend && $tend < $now)
+                        or ($tstart && $tstart > $now);
             }
-	}
-
+        }
+    }
     return 0;
 }
 
+sub privileged_by_domain {
+    my ($domains,$roles) = @_;
+    my %privileged = ();
+    my $cachetime = 60*60*24;
+    my $now = time;
+    unless ((ref($domains) eq 'ARRAY') && (ref($roles) eq 'ARRAY')) {
+        return %privileged;
+    }
+    foreach my $dom (@{$domains}) {
+        next if (ref($privileged{$dom}) eq 'HASH');
+        my $needroles;
+        foreach my $role (@{$roles}) {
+            my ($result,$cached)=&is_cached_new('priv_'.$role,$dom);
+            if (defined($cached)) {
+                if (ref($result) eq 'HASH') {
+                    $privileged{$dom}{$role} = $result;
+                }
+            } else {
+                $needroles = 1;
+            }
+        }
+        if ($needroles) {
+            my %dompersonnel = &get_domain_roles($dom,$roles);
+            $privileged{$dom} = {};
+            foreach my $server (keys(%dompersonnel)) {
+                if (ref($dompersonnel{$server}) eq 'HASH') {
+                    foreach my $item (keys(%{$dompersonnel{$server}})) {
+                        my ($trole,$uname,$udom,$rest) = split(/:/,$item,4);
+                        my ($end,$start) = split(/:/,$dompersonnel{$server}{$item});
+                        next if ($end && $end < $now);
+                        $privileged{$dom}{$trole}{$uname.':'.$udom} =
+                            $dompersonnel{$server}{$item};
+                    }
+                }
+            }
+            if (ref($privileged{$dom}) eq 'HASH') {
+                foreach my $role (@{$roles}) {
+                    if (ref($privileged{$dom}{$role}) eq 'HASH') {
+                        &do_cache_new('priv_'.$role,$dom,$privileged{$dom}{$role},$cachetime);
+                    } else {
+                        my %hash = ();
+                        &do_cache_new('priv_'.$role,$dom,\%hash,$cachetime);
+                    }
+                }
+            }
+        }
+    }
+    return %privileged;
+}
+
 # -------------------------------------------------------- Get user privileges
 
 sub rolesinit {
@@ -4727,9 +5279,11 @@ sub rolesinit {
 }
 
 sub set_arearole {
-    my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
+    my ($trole,$area,$tstart,$tend,$domain,$username,$nolog) = @_;
+    unless ($nolog) {
 # log the associated role with the area
-    &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
+        &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
+    }
     return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
 }
 
@@ -4977,15 +5531,19 @@ sub delete_env_groupprivs {
 sub check_adhoc_privs {
     my ($cdom,$cnum,$update,$refresh,$now,$checkrole,$caller) = @_;
     my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
+    my $setprivs;
     if ($env{$cckey}) {
         my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
         &role_status($cckey,$update,$refresh,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
         unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
             &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller);
+            $setprivs = 1;
         }
     } else {
         &set_adhoc_privileges($cdom,$cnum,$checkrole,$caller);
+        $setprivs = 1;
     }
+    return $setprivs;
 }
 
 sub set_adhoc_privileges {
@@ -4994,7 +5552,7 @@ sub set_adhoc_privileges {
     my $area = '/'.$dcdom.'/'.$pickedcourse;
     my $spec = $role.'.'.$area;
     my %userroles = &set_arearole($role,$area,'','',$env{'user.domain'},
-                                  $env{'user.name'});
+                                  $env{'user.name'},1);
     my %ccrole = ();
     &standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
     my ($author,$adv)= &set_userprivs(\%userroles,\%ccrole);
@@ -5057,12 +5615,36 @@ sub del {
 
 # -------------------------------------------------------------- dump interface
 
+sub unserialize {
+    my ($rep, $escapedkeys) = @_;
+
+    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);
+    }
+    return \%returnhash;
+}
+
+# see Lond::dump_with_regexp
+# if $escapedkeys hash keys won't get unescaped.
 sub dump {
-    my ($namespace,$udomain,$uname,$regexp,$range)=@_;
+    my ($namespace,$udomain,$uname,$regexp,$range,$escapedkeys)=@_;
     if (!$udomain) { $udomain=$env{'user.domain'}; }
     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);
     } else {
@@ -5074,7 +5656,7 @@ sub dump {
     if (!($rep =~ /^error/ )) {
 	foreach my $item (@pairs) {
 	    my ($key,$value)=split(/=/,$item,2);
-	    $key = &unescape($key);
+            $key = &unescape($key) unless ($escapedkeys);
 	    next if ($key =~ /^error: 2 /);
 	    $returnhash{$key}=&thaw_unescape($value);
 	}
@@ -5087,23 +5669,9 @@ sub dump {
 
 sub dumpstore {
    my ($namespace,$udomain,$uname,$regexp,$range)=@_;
-   if (!$udomain) { $udomain=$env{'user.domain'}; }
-   if (!$uname) { $uname=$env{'user.name'}; }
-   my $uhome=&homeserver($uname,$udomain);
-   if ($regexp) {
-       $regexp=&escape($regexp);
-   } else {
-       $regexp='.';
-   }
-   my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
-   my @pairs=split(/\&/,$rep);
-   my %returnhash=();
-   foreach my $item (@pairs) {
-       my ($key,$value)=split(/=/,$item,2);
-       next if ($key =~ /^error: 2 /);
-       $returnhash{$key}=&thaw_unescape($value);
-   }
-   return %returnhash;
+   # same as dump but keys must be escaped. They may contain colon separated
+   # lists of values that may themself contain colons (e.g. symbs).
+   return &dump($namespace, $udomain, $uname, $regexp, $range, 1);
 }
 
 # -------------------------------------------------------------- keys interface
@@ -5372,6 +5940,88 @@ sub tmpdel {
     return &reply("tmpdel:$token",$server);
 }
 
+# ------------------------------------------------------------ get_timebased_id
+
+sub get_timebased_id {
+    my ($prefix,$keyid,$namespace,$cdom,$cnum,$idtype,$who,$locktries,
+        $maxtries) = @_;
+    my ($newid,$error,$dellock);
+    unless (($prefix =~ /^\w+$/) && ($keyid =~ /^\w+$/) && ($namespace ne '')) {
+        return ('','ok','invalid call to get suffix');
+    }
+
+# set defaults for any optional args for which values were not supplied
+    if ($who eq '') {
+        $who = $env{'user.name'}.':'.$env{'user.domain'};
+    }
+    if (!$locktries) {
+        $locktries = 3;
+    }
+    if (!$maxtries) {
+        $maxtries = 10;
+    }
+
+    if (($cdom eq '') || ($cnum eq '')) {
+        if ($env{'request.course.id'}) {
+            $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        }
+        if (($cdom eq '') || ($cnum eq '')) {
+            return ('','ok','call to get suffix not in course context');
+        }
+    }
+
+# construct locking item
+    my $lockhash = {
+                      $prefix."\0".'locked_'.$keyid => $who,
+                   };
+    my $tries = 0;
+
+# attempt to get lock on nohist_$namespace file
+    my $gotlock = &Apache::lonnet::newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
+    while (($gotlock ne 'ok') && $tries <$locktries) {
+        $tries ++;
+        sleep 1;
+        $gotlock = &Apache::lonnet::newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
+    }
+
+# attempt to get unique identifier, based on current timestamp
+    if ($gotlock eq 'ok') {
+        my %inuse = &Apache::lonnet::dump('nohist_'.$namespace,$cdom,$cnum,$prefix);
+        my $id = time;
+        $newid = $id;
+        my $idtries = 0;
+        while (exists($inuse{$prefix."\0".$newid}) && $idtries < $maxtries) {
+            if ($idtype eq 'concat') {
+                $newid = $id.$idtries;
+            } else {
+                $newid ++;
+            }
+            $idtries ++;
+        }
+        if (!exists($inuse{$prefix."\0".$newid})) {
+            my %new_item =  (
+                              $prefix."\0".$newid => $who,
+                            );
+            my $putresult = &Apache::lonnet::put('nohist_'.$namespace,\%new_item,
+                                                 $cdom,$cnum);
+            if ($putresult ne 'ok') {
+                undef($newid);
+                $error = 'error saving new item: '.$putresult;
+            }
+        } else {
+             $error = ('error: no unique suffix available for the new item ');
+        }
+#  remove lock
+        my @del_lock = ($prefix."\0".'locked_'.$keyid);
+        $dellock = &Apache::lonnet::del('nohist_'.$namespace,\@del_lock,$cdom,$cnum);
+    } else {
+        $error = "error: could not obtain lockfile\n";
+        $dellock = 'ok';
+    }
+    return ($newid,$dellock,$error);
+}
+
 # -------------------------------------------------- portfolio access checking
 
 sub portfolio_access {
@@ -5626,17 +6276,23 @@ sub usertools_access {
                       official   => 1,
                       unofficial => 1,
                       community  => 1,
+                      textbook   => 1,
+                 );
+    } elsif ($context eq 'requestauthor') {
+        %tools = (
+                      requestauthor => 1,
                  );
     } else {
         %tools = (
                       aboutme   => 1,
                       blog      => 1,
+                      webdav    => 1,
                       portfolio => 1,
                  );
     }
     return if (!defined($tools{$tool}));
 
-    if ((!defined($udom)) || (!defined($uname))) {
+    if (($udom eq '') || ($uname eq '')) {
         $udom = $env{'user.domain'};
         $uname = $env{'user.name'};
     }
@@ -5645,25 +6301,32 @@ sub usertools_access {
         if ($action ne 'reload') {
             if ($context eq 'requestcourses') {
                 return $env{'environment.canrequest.'.$tool};
+            } elsif ($context eq 'requestauthor') {
+                return $env{'environment.canrequest.author'};
             } else {
                 return $env{'environment.availabletools.'.$tool};
             }
         }
     }
 
-    my ($toolstatus,$inststatus);
+    my ($toolstatus,$inststatus,$envkey);
+    if ($context eq 'requestauthor') {
+        $envkey = $context;
+    } else {
+        $envkey = $context.'.'.$tool;
+    }
 
     if (($udom eq $env{'user.domain'}) && ($uname eq $env{'user.name'}) &&
          ($action ne 'reload')) {
-        $toolstatus = $env{'environment.'.$context.'.'.$tool};
+        $toolstatus = $env{'environment.'.$envkey};
         $inststatus = $env{'environment.inststatus'};
     } else {
         if (ref($userenvref) eq 'HASH') {
-            $toolstatus = $userenvref->{$context.'.'.$tool};
+            $toolstatus = $userenvref->{$envkey};
             $inststatus = $userenvref->{'inststatus'};
         } else {
-            my %userenv = &userenvironment($udom,$uname,$context.'.'.$tool,'inststatus');
-            $toolstatus = $userenv{$context.'.'.$tool};
+            my %userenv = &userenvironment($udom,$uname,$envkey,'inststatus');
+            $toolstatus = $userenv{$envkey};
             $inststatus = $userenv{'inststatus'};
         }
     }
@@ -5729,7 +6392,7 @@ sub usertools_access {
             }
         }
     } else {
-        if ($context eq 'tools') {
+        if (($context eq 'tools') && ($tool ne 'webdav')) {
             $access = 1;
         } else {
             $access = 0;
@@ -6386,6 +7049,73 @@ sub allowed {
    return 'F';
 }
 
+# ------------------------------------------- Check construction space access
+
+sub constructaccess {
+    my ($url,$setpriv)=@_;
+
+# We do not allow editing of previous versions of files
+    if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
+
+# Get username and domain from URL
+    my ($ownername,$ownerdomain,$ownerhome);
+
+    ($ownerdomain,$ownername) =
+        ($url=~ m{^(?:\Q$perlvar{'lonDocRoot'}\E|)/priv/($match_domain)/($match_username)/});
+
+# The URL does not really point to any authorspace, forget it
+    unless (($ownername) && ($ownerdomain)) { return ''; }
+
+# Now we need to see if the user has access to the authorspace of
+# $ownername at $ownerdomain
+
+    if (($ownername eq $env{'user.name'}) && ($ownerdomain eq $env{'user.domain'})) {
+# Real author for this?
+       $ownerhome = $env{'user.home'};
+       if (exists($env{'user.priv.au./'.$ownerdomain.'/./'})) {
+          return ($ownername,$ownerdomain,$ownerhome);
+       }
+    } else {
+# Co-author for this?
+        if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) ||
+            exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) {
+            $ownerhome = &homeserver($ownername,$ownerdomain);
+            return ($ownername,$ownerdomain,$ownerhome);
+        }
+    }
+
+# We don't have any access right now. If we are not possibly going to do anything about this,
+# we might as well leave
+   unless ($setpriv) { return ''; }
+
+# Backdoor access?
+    my $allowed=&allowed('eco',$ownerdomain);
+# Nope
+    unless ($allowed) { return ''; }
+# Looks like we may have access, but could be locked by the owner of the construction space
+    if ($allowed eq 'U') {
+        my %blocked=&get('environment',['domcoord.author'],
+                         $ownerdomain,$ownername);
+# Is blocked by owner
+        if ($blocked{'domcoord.author'} eq 'blocked') { return ''; }
+    }
+    if (($allowed eq 'F') || ($allowed eq 'U')) {
+# Grant temporary access
+        my $then=$env{'user.login.time'};
+        my $update=$env{'user.update.time'};
+        if (!$update) { $update = $then; }
+        my $refresh=$env{'user.refresh.time'};
+        if (!$refresh) { $refresh = $update; }
+        my $now = time;
+        &check_adhoc_privs($ownerdomain,$ownername,$update,$refresh,
+                           $now,'ca','constructaccess');
+        $ownerhome = &homeserver($ownername,$ownerdomain);
+        return($ownername,$ownerdomain,$ownerhome);
+    }
+# No business here
+    return '';
+}
+
 sub get_comm_blocks {
     my ($cdom,$cnum) = @_;
     if ($cdom eq '' || $cnum eq '') {
@@ -6653,19 +7383,23 @@ 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;
 	}
@@ -6911,8 +7645,8 @@ sub auto_validate_instcode {
     }
     $response=&unescape(&reply('autovalidateinstcode:'.$cdom.':'.
                         &escape($instcode).':'.&escape($owner),$homeserver));
-    my ($outcome,$description) = map { &unescape($_); } split('&',$response,2);
-    return ($outcome,$description);
+    my ($outcome,$description,$defaultcredits) = map { &unescape($_); } split('&',$response,3);
+    return ($outcome,$description,$defaultcredits);
 }
 
 sub auto_create_password {
@@ -7450,6 +8184,41 @@ sub assignrole {
                             }
                         }
                     }
+                } elsif ($context eq 'requestauthor') {
+                    if (($udom eq $env{'user.domain'}) && ($uname eq $env{'user.name'}) &&
+                        ($url eq '/'.$udom.'/') && ($role eq 'au')) {
+                        if ($env{'environment.requestauthor'} eq 'automatic') {
+                            $refused = '';
+                        } else {
+                            my %domdefaults = &get_domain_defaults($udom);
+                            if (ref($domdefaults{'requestauthor'}) eq 'HASH') {
+                                my $checkbystatus;
+                                if ($env{'user.adv'}) {
+                                    my $disposition = $domdefaults{'requestauthor'}{'_LC_adv'};
+                                    if ($disposition eq 'automatic') {
+                                        $refused = '';
+                                    } elsif ($disposition eq '') {
+                                        $checkbystatus = 1;
+                                    }
+                                } else {
+                                    $checkbystatus = 1;
+                                }
+                                if ($checkbystatus) {
+                                    if ($env{'environment.inststatus'}) {
+                                        my @inststatuses = split(/,/,$env{'environment.inststatus'});
+                                        foreach my $type (@inststatuses) {
+                                            if (($type ne '') &&
+                                                ($domdefaults{'requestauthor'}{$type} eq 'automatic')) {
+                                                $refused = '';
+                                            }
+                                        }
+                                    } elsif ($domdefaults{'requestauthor'}{'default'} eq 'automatic') {
+                                        $refused = '';
+                                    }
+                                }
+                            }
+                        }
+                    }
                 }
                 if ($refused) {
                     &logthis('Refused assignrole: '.$udom.' '.$uname.' '.$url.
@@ -7499,11 +8268,25 @@ sub assignrole {
 # log new user role if status is ok
     if ($answer eq 'ok') {
 	&userrolelog($role,$uname,$udom,$url,$start,$end);
+        if (($role eq 'cc') || ($role eq 'in') ||
+            ($role eq 'ep') || ($role eq 'ad') ||
+            ($role eq 'ta') || ($role eq 'st') ||
+            ($role=~/^cr/) || ($role eq 'gr') ||
+            ($role eq 'co')) {
 # for course roles, perform group memberships changes triggered by role change.
-        &courserolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,$selfenroll,$context);
-        unless ($role =~ /^gr/) {
-            &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
-                                             $origstart,$selfenroll,$context);
+            unless ($role =~ /^gr/) {
+                &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
+                                                 $origstart,$selfenroll,$context);
+            }
+            &courserolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
+                           $selfenroll,$context);
+        } elsif (($role eq 'li') || ($role eq 'dg') || ($role eq 'sc') ||
+                 ($role eq 'au') || ($role eq 'dc')) {
+            &domainrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
+                           $context);
+        } elsif (($role eq 'ca') || ($role eq 'aa')) {
+            &coauthorrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
+                             $context);
         }
         if ($role eq 'cc') {
             &autoupdate_coowners($url,$end,$start,$uname,$udom);
@@ -7803,7 +8586,7 @@ sub modifyuser {
 sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
         $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid,
-        $selfenroll,$context,$inststatus)=@_;
+        $selfenroll,$context,$inststatus,$credits)=@_;
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
 	    return 'not_in_class';
@@ -7815,15 +8598,17 @@ 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);
+					$gene,$usec,$end,$start,$type,$locktype,
+                                        $cid,$selfenroll,$context,$credits);
     return $reply;
 }
 
 sub modify_student_enrollment {
-    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid,$selfenroll,$context) = @_;
+    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
+        $locktype,$cid,$selfenroll,$context,$credits) = @_;
     my ($cdom,$cnum,$chome);
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
@@ -7870,7 +8655,7 @@ sub modify_student_enrollment {
     my %old_entry = &Apache::lonnet::get('classlist',[$user],$cdom,$cnum);
     my $reply=cput('classlist',
 		   {$user => 
-			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
+			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype,$credits) },
 		   $cdom,$cnum);
     if (($reply eq 'ok') || ($reply eq 'delayed')) {
         &devalidate_getsection_cache($udom,$uname,$cid);
@@ -8099,7 +8884,7 @@ sub is_course {
     my %courses = &courseiddump($cdom, '.', 1, '.', '.', $cnum, undef, undef,
         '.');
 
-    return unless exists($courses{$cdom.'_'.$cnum});
+    return unless(exists($courses{$cdom.'_'.$cnum}));
     return wantarray ? ($cdom, $cnum) : $cdom.'_'.$cnum;
 }
 
@@ -8124,6 +8909,9 @@ sub store_userdata {
                     $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
                 }
                 $namevalue=~s/\&$//;
+                unless ($namespace eq 'courserequests') {
+                    $datakey = &escape($datakey);
+                }
                 $result =  &reply("store:$udom:$uname:$namespace:$datakey:".
                                   $namevalue,$uhome);
             }
@@ -8946,6 +9734,26 @@ sub resdata {
     return undef;
 }
 
+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
 #
@@ -8974,7 +9782,7 @@ sub EXT_cache_set {
 # --------------------------------------------------------- Value of a Variable
 sub EXT {
 
-    my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
+    my ($varname,$symbparm,$udom,$uname,$usection,$recurse,$cid)=@_;
     unless ($varname) { return ''; }
     #get real user name/domain, courseid and symb
     my $courseid;
@@ -9089,26 +9897,51 @@ sub EXT {
 	    if (!$symbparm) { $symbparm=&symbread(); }
 	}
 
-	if ($space eq 'title') {
-	    if (!$symbparm) { $symbparm = $env{'request.filename'}; }
-	    return &gettitle($symbparm);
-	}
+        if ($qualifier eq '') {
+	    if ($space eq 'title') {
+	        if (!$symbparm) { $symbparm = $env{'request.filename'}; }
+	        return &gettitle($symbparm);
+	    }
 	
-	if ($space eq 'map') {
-	    my ($map) = &decode_symb($symbparm);
-	    return &symbread($map);
-	}
-	if ($space eq 'filename') {
-	    if ($symbparm) {
-		return &clutter((&decode_symb($symbparm))[2]);
+	    if ($space eq 'map') {
+	        my ($map) = &decode_symb($symbparm);
+	        return &symbread($map);
+	    }
+            if ($space eq 'maptitle') {
+                my ($map) = &decode_symb($symbparm);
+                return &gettitle($map);
+            }
+	    if ($space eq 'filename') {
+	        if ($symbparm) {
+		    return &clutter((&decode_symb($symbparm))[2]);
+	        }
+	        return &hreflocation('',$env{'request.filename'});
 	    }
-	    return &hreflocation('',$env{'request.filename'});
-	}
+
+            if ((defined($courseid)) && ($courseid eq $env{'request.course.id'}) && $symbparm) {
+                if ($space eq 'visibleparts') {
+                    my $navmap = Apache::lonnavmaps::navmap->new();
+                    my $item;
+                    if (ref($navmap)) {
+                        my $res = $navmap->getBySymb($symbparm);
+                        my $parts = $res->parts();
+                        if (ref($parts) eq 'ARRAY') {
+                            $item = join(',',@{$parts});
+                        }
+                        undef($navmap);
+                    }
+                    return $item;
+                }
+            }
+        }
 
 	my ($section, $group, @groups);
 	my ($courselevelm,$courselevel);
-	if ($symbparm && defined($courseid) && 
-	    $courseid eq $env{'request.course.id'}) {
+        if (($courseid eq '') && ($cid)) {
+            $courseid = $cid;
+        }
+	if (($symbparm && $courseid) && 
+	    (($courseid eq $env{'request.course.id'}) || ($courseid eq $cid))) {
 
 	    #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
 
@@ -9355,7 +10188,7 @@ sub metadata {
     # if it is a non metadata possible uri return quickly
     if (($uri eq '') || 
 	(($uri =~ m|^/*adm/|) && 
-	     ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
+	     ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard)$})) ||
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ m{^/*uploaded/.+\.sequence$})) {
 	return undef;
     }
@@ -9786,7 +10619,7 @@ sub get_course_slots {
         my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
         my ($tmp) = keys(%slots);
         if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-            &Apache::lonnet::do_cache_new('allslots',$hashid,\%slots,600);
+            &do_cache_new('allslots',$hashid,\%slots,600);
             return %slots;
         }
     }
@@ -9799,6 +10632,41 @@ sub devalidate_slots_cache {
     &devalidate_cache_new('allslots',$hashid);
 }
 
+sub get_coursechange {
+    my ($cdom,$cnum) = @_;
+    if ($cdom eq '' || $cnum eq '') {
+        return unless ($env{'request.course.id'});
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    }
+    my $hashid=$cdom.'_'.$cnum;
+    my ($change,$cached)=&is_cached_new('crschange',$hashid);
+    if ((defined($cached)) && ($change ne '')) {
+        return $change;
+    } else {
+        my %crshash;
+        %crshash = &get('environment',['internal.contentchange'],$cdom,$cnum);
+        if ($crshash{'internal.contentchange'} eq '') {
+            $change = $env{'course.'.$cdom.'_'.$cnum.'.internal.created'};
+            if ($change eq '') {
+                %crshash = &get('environment',['internal.created'],$cdom,$cnum);
+                $change = $crshash{'internal.created'};
+            }
+        } else {
+            $change = $crshash{'internal.contentchange'};
+        }
+        my $cachetime = 600;
+        &do_cache_new('crschange',$hashid,$change,$cachetime);
+    }
+    return $change;
+}
+
+sub devalidate_coursechange_cache {
+    my ($cnum,$cdom)=@_;
+    my $hashid=$cnum.':'.$cdom;
+    &devalidate_cache_new('crschange',$hashid);
+}
+
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
@@ -9826,7 +10694,7 @@ sub symblist {
 # --------------------------------------------------------------- Verify a symb
 
 sub symbverify {
-    my ($symb,$thisurl)=@_;
+    my ($symb,$thisurl,$encstate)=@_;
     my $thisfn=$thisurl;
     $thisfn=&declutter($thisfn);
 # direct jump to resource in page or to a sequence - will construct own symbs
@@ -9845,31 +10713,46 @@ sub symbverify {
 
     if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
+        my $noclutter;
         if (($thisurl =~ m{^/adm/wrapper/ext/}) || ($thisurl =~ m{^ext/})) {
             $thisurl =~ s/\?.+$//;
+            if ($map =~ m{^uploaded/.+\.page$}) {
+                $thisurl =~ s{^(/adm/wrapper|)/ext/}{http://};
+                $thisurl =~ s{^\Qhttp://https://\E}{https://};
+                $noclutter = 1;
+            }
+        }
+        my $ids;
+        if ($noclutter) {
+            $ids=$bighash{'ids_'.$thisurl};
+        } else {
+            $ids=$bighash{'ids_'.&clutter($thisurl)};
         }
-        my $ids=$bighash{'ids_'.&clutter($thisurl)};
         unless ($ids) {
-            my $idkey = 'ids_'.($thisurl =~ m{^/}? '' : '/').$thisurl;  
+            my $idkey = 'ids_'.($thisurl =~ m{^/}? '' : '/').$thisurl;
             $ids=$bighash{$idkey};
         }
         if ($ids) {
 # ------------------------------------------------------------------- Has ID(s)
+            if ($thisfn =~ m{^/adm/wrapper/ext/}) {
+                $symb =~ s/\?.+$//;
+            }
 	    foreach my $id (split(/\,/,$ids)) {
 	       my ($mapid,$resid)=split(/\./,$id);
-               if ($thisfn =~ m{^/adm/wrapper/ext/}) {
-                   $symb =~ s/\?.+$//;
-               }
                if (
   &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
-   eq $symb) { 
-		   if (($env{'request.role.adv'}) ||
-		       ($bighash{'encrypted_'.$id} eq $env{'request.enc'}) ||
+   eq $symb) {
+                   if (ref($encstate)) {
+                       $$encstate = $bighash{'encrypted_'.$id};
+                   }
+                   if (($env{'request.role.adv'}) ||
+                       ($bighash{'encrypted_'.$id} eq $env{'request.enc'}) ||
                        ($thisurl eq '/adm/navmaps')) {
-		       $okay=1; 
-		   }
-	       }
-	   }
+                       $okay=1;
+                       last;
+                   }
+               }
+           }
         }
 	untie(%bighash);
     }
@@ -9942,14 +10825,18 @@ sub deversion {
 
 sub symbread {
     my ($thisfn,$donotrecurse)=@_;
-    my $cache_str='request.symbread.cached.'.$thisfn;
-    if (defined($env{$cache_str})) { return $env{$cache_str}; }
+    my $cache_str;
+    if ($thisfn ne '') {
+        $cache_str='request.symbread.cached.'.$thisfn;
+        if ($env{$cache_str} ne '') {
+            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
@@ -10177,7 +11064,6 @@ 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') {
@@ -10760,6 +11646,7 @@ sub declutter {
     $thisfn=~s|^adm/wrapper/||;
     $thisfn=~s|^adm/coursedocs/showdoc/||;
     $thisfn=~s/^res\///;
+    $thisfn=~s/^priv\///;
     unless (($thisfn =~ /^ext/) || ($thisfn =~ /\.(page|sequence)___\d+___ext/)) {
         $thisfn=~s/\?.+$//;
     }
@@ -10859,12 +11746,12 @@ sub goodbye {
 }
 
 sub get_dns {
-    my ($url,$func,$ignore_cache) = @_;
+    my ($url,$func,$ignore_cache,$nocache,$hashref) = @_;
     if (!$ignore_cache) {
 	my ($content,$cached)=
 	    &Apache::lonnet::is_cached_new('dns',$url);
 	if ($cached) {
-	    &$func($content);
+	    &$func($content,$hashref);
 	    return;
 	}
     }
@@ -10889,8 +11776,10 @@ sub get_dns {
         delete($alldns{$dns});
 	next if ($response->is_error());
 	my @content = split("\n",$response->content);
-	&Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
-	&$func(\@content);
+        unless ($nocache) {
+	    &do_cache_new('dns',$url,\@content,30*24*60*60);
+        }
+	&$func(\@content,$hashref);
 	return;
     }
     close($config);
@@ -10898,9 +11787,47 @@ sub get_dns {
     &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
     open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
     my @content = <$config>;
-    &$func(\@content);
+    &$func(\@content,$hashref);
+    return;
+}
+
+# ------------------------------------------------------Get DNS checksums file
+sub parse_dns_checksums_tab {
+    my ($lines,$hashref) = @_;
+    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $loncaparev = &get_server_loncaparev($machine_dom);
+    my ($release,$timestamp) = split(/\-/,$loncaparev);
+    my (%chksum,%revnum);
+    if (ref($lines) eq 'ARRAY') {
+        chomp(@{$lines});
+        my $version = shift(@{$lines});
+        if ($version eq $release) {
+            foreach my $line (@{$lines}) {
+                my ($file,$version,$shasum) = split(/,/,$line);
+                $chksum{$file} = $shasum;
+                $revnum{$file} = $version;
+            }
+            if (ref($hashref) eq 'HASH') {
+                %{$hashref} = (
+                                sums     => \%chksum,
+                                versions => \%revnum,
+                              );
+            }
+        }
+    }
     return;
 }
+
+sub fetch_dns_checksums {
+    my %checksums;
+    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $loncaparev = &get_server_loncaparev($machine_dom);
+    my ($release,$timestamp) = split(/\-/,$loncaparev);
+    &get_dns("/adm/dns/checksums/$release",\&parse_dns_checksums_tab,1,1,
+             \%checksums);
+    return \%checksums;
+}
+
 # ------------------------------------------------------------ Read domain file
 {
     my $loaded;
@@ -11210,9 +12137,9 @@ sub get_dns {
 	    }
 	    push(@{$iphost{$ip}},@{$name_to_host{$name}});
 	}
-	&Apache::lonnet::do_cache_new('iphost','iphost',
-				      [\%iphost,\%name_to_ip,\%lonid_to_ip],
-				      48*60*60);
+	&do_cache_new('iphost','iphost',
+		      [\%iphost,\%name_to_ip,\%lonid_to_ip],
+		      48*60*60);
 
 	return %iphost;
     }
@@ -11268,7 +12195,7 @@ sub get_dns {
             }
             $seen{$prim_ip} = 1;
         }
-        return &Apache::lonnet::do_cache_new('internetnames',$lonid,\@idns,12*60*60);
+        return &do_cache_new('internetnames',$lonid,\@idns,12*60*60);
     }
 
 }
@@ -11277,6 +12204,39 @@ 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);
 }
 
+# ------------------------------------------------------- Read loncaparev table
+{
+    sub load_loncaparevs {
+        if (-e "$perlvar{'lonTabDir'}/loncaparevs.tab") {
+            if (open(my $config,"<$perlvar{'lonTabDir'}/loncaparevs.tab")) {
+                while (my $configline=<$config>) {
+                    chomp($configline);
+                    my ($hostid,$loncaparev)=split(/:/,$configline);
+                    $loncaparevs{$hostid}=$loncaparev;
+                }
+                close($config);
+            }
+        }
+    }
+}
+
+# ----------------------------------------------------- Read serverhostID table
+{
+    sub load_serverhomeIDs {
+        if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
+            if (open(my $config,"<$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
+                while (my $configline=<$config>) {
+                    chomp($configline);
+                    my ($name,$id)=split(/:/,$configline);
+                    $serverhomeIDs{$name}=$id;
+                }
+                close($config);
+            }
+        }
+    }
+}
+
+
 BEGIN {
 
 # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
@@ -11352,34 +12312,15 @@ BEGIN {
     close($config);
 }
 
-# ---------------------------------------------------------- Read loncaparev table
-{
-    if (-e "$perlvar{'lonTabDir'}/loncaparevs.tab") {
-        if (open(my $config,"<$perlvar{'lonTabDir'}/loncaparevs.tab")) {
-            while (my $configline=<$config>) {
-                chomp($configline);
-                my ($hostid,$loncaparev)=split(/:/,$configline);
-                $loncaparevs{$hostid}=$loncaparev;
-            }
-            close($config);
-        }
-    }
-}
+# --------------------------------------------------------- Read loncaparev table
 
-# ---------------------------------------------------------- Read serverhostID table
-{
-    if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
-        if (open(my $config,"<$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
-            while (my $configline=<$config>) {
-                chomp($configline);
-                my ($name,$id)=split(/:/,$configline);
-                $serverhomeIDs{$name}=$id;
-            }
-            close($config);
-        }
-    }
-}
+&load_loncaparevs();
+
+# ------------------------------------------------------- Read serverhostID table
+
+&load_serverhomeIDs();
 
+# ---------------------------------------------------------- Read releaseslist XML
 {
     my $file = $Apache::lonnet::perlvar{'lonTabDir'}.'/releaseslist.xml';
     if (-e $file) {
@@ -11578,8 +12519,8 @@ were new keys. I.E. 1:foo will become 1:
 
 Calling convention:
 
- my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
- &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
+ my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname);
+ &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname);
 
 For more detailed information, see lonnet specific documentation.
 
@@ -11725,6 +12666,21 @@ allowed($priv,$uri,$symb,$role) : check
 
 =item *
 
+constructaccess($url,$setpriv) : check for access to construction space URL
+
+See if the owner domain and name in the URL match those in the
+expected environment.  If so, return three element list
+($ownername,$ownerdomain,$ownerhome).
+
+Otherwise return the null string.
+
+If second argument 'setpriv' is true, it assigns the privileges,
+and returns the same three element list, unless the owner has
+blocked "ad hoc" Domain Coordinator access to the Author Space,
+in which case the null string is returned.
+
+=item *
+
 definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
 role rolename set privileges in format of lonTabs/roles.tab for system, domain,
 and course level
@@ -11741,7 +12697,7 @@ environment).  If no custom name is defi
    
 =item *
 
-get_my_roles($uname,$udom,$context,$types,$roles,$roledoms,$withsec) :
+get_my_roles($uname,$udom,$context,$types,$roles,$roledoms,$withsec,$hidepriv) :
 All arguments are optional. Returns a hash of a roles, either for
 co-author/assistant author roles for a user's Construction Space
 (default), or if $context is 'userroles', roles for the user himself,
@@ -11755,6 +12711,41 @@ of role statuses (active, future or prev
 to restrict the list of roles reported. If no array ref is 
 provided for types, will default to return only active roles.
 
+=item *
+
+in_course($udom,$uname,$cdom,$cnum,$type,$hideprivileged) : determine if
+user: $uname:$udom has a role in the course: $cdom_$cnum.
+
+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
+have active Domain Coordinator role in course's domain or in additional
+domains (specified in 'Domains to check for privileged users' in course
+environment -- set via:  Course Settings -> Classlists and staff listing).
+
+=item *
+
+privileged($username,$domain,$possdomains,$possroles) : returns 1 if user
+$username:$domain is a privileged user (e.g., Domain Coordinator or Super User)
+$possdomains and $possroles are optional array refs -- to domains to check and
+roles to check.  If $possdomains is not specified, a dump will be done of the
+users' roles.db to check for a dc or su role in any domain. This can be
+time consuming if &privileged is called repeatedly (e.g., when displaying a
+classlist), so in such cases, supplying a $possdomains array is preferred, as
+this then allows &privileged_by_domain() to be used, which caches the identity
+of privileged users, eliminating the need for repeated calls to &dump().
+
+=item *
+
+privileged_by_domain($possdomains,$roles) : returns a hash of a hash of a hash,
+where the outer hash keys are domains specified in the $possdomains array ref,
+next inner hash keys are privileged roles specified in the $roles array ref,
+and the innermost hash contains key = value pairs for username:domain = end:start
+for active or future "privileged" users with that role in that domain. To avoid
+repeated dumps of domain roles -- via &get_domain_roles() -- contents of the
+innerhash are cached using priv_$role and $dom as the identifiers.
+
 =back
 
 =head2 User Modification
@@ -11796,8 +12787,8 @@ 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
@@ -11847,7 +12838,9 @@ Inputs:
 
 =item B<$context> role change context (shown in User Management Logs display in a course)
 
-=item B<$inststatus> institutional status of user - : separated string of escaped status types  
+=item B<$inststatus> institutional status of user - : separated string of escaped status types
+
+=item B<$credits> Number of credits student will earn from this class - only needs to be supplied if value needs to be different from default credits for class.
 
 =back
 
@@ -11855,20 +12848,20 @@ 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
 
@@ -11892,6 +12885,8 @@ Inputs:
 
 =item $context
 
+=item $credits, number of credits student will earn from this class
+
 =back
 
 
@@ -11948,7 +12943,7 @@ 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 *
 
@@ -11957,6 +12952,9 @@ 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
 
@@ -12017,10 +13015,15 @@ resource. Expects the local filesystem p
 
 =item *
 
-EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
-a vairety of different possible values, $varname should be a request
-string, and the other parameters can be used to specify who and what
-one is asking about.
+EXT($varname,$symb,$udom,$uname,$usection,$recurse,$cid) : evaluates 
+and returns the value of a variety of different possible values,
+$varname should be a request string, and the other parameters can be
+used to specify who and what one is asking about. Ordinarily, $cid 
+does not need to be specified, as it is retrived from 
+$env{'request.course.id'}, but &Apache::lonnet::EXT() is called
+within lonuserstate::loadmap() when initializing a course, before
+$env{'request.course.id'} has been set, so it needs to be provided
+in that one case.
 
 Possible values for $varname are environment.lastname (or other item
 from the envirnment hash), user.name (or someother aspect about the
@@ -12058,12 +13061,14 @@ returns the data handle
 
 =item *
 
-symbverify($symb,$thisfn) : verifies that $symb actually exists and is
-a possible symb for the URL in $thisfn, and if is an encryypted
+symbverify($symb,$thisfn,$encstate) : verifies that $symb actually exists
+and is a possible symb for the URL in $thisfn, and if is an encrypted
 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 existance of
-the course initial hash, and uses $env('request.course.id'}
-
+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
+call to symbverify, it will be set to 1 if the symb has been set to be 
+encrypted; otherwise it will be null.
 
 =item *
 
@@ -12116,6 +13121,34 @@ expirespread($uname,$udom,$stype,$usymb)
 devalidate($symb) : devalidate temporary spreadsheet calculations,
 forcing spreadsheet to reevaluate the resource scores next time.
 
+=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
+                    group item -- e.g., bulletin board, group page etc.).
+
+ 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
+         $forceview -- 1 if icon/link should be to go to view mode
+
+=item *
+
+is_course_upload($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
+homeserver.
+
+  input: 3 args -- filename (decluttered), course number and course domain.
+  output: boolean -- 1 if file was uploaded.
+
 =back
 
 =head2 Storing/Retreiving Data
@@ -12268,15 +13301,90 @@ 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
+
+=back
+
+=item
+inststatus: types of institutional affiliation, and order in which they are displayed.
+
+=over
+
+=item
+inststatustypes, inststatusorder
+
+=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
+
+=back
+
+=item
+usersessions: set options for hosting of your users in other domains, and hosting of users from other domains
+on your servers.
 
-%domdefaults = &get_auth_defaults($target_domain);
+=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 $ignore_cache arg is true, or from domain's configuration.db (if available),
+or lastly from values in lonTabs/dns_domain,tab, or lonTabs/domain.tab.
+
+Typical usage:
+
+%domdefaults = &get_domain_defaults($target_domain);
 
 =back
 
@@ -12671,6 +13779,8 @@ Internal notes:
  
  Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
 
+=item *
+
 modify_access_controls():
 
 Modifies access controls for a portfolio file
@@ -12688,7 +13798,51 @@ Returns:
 3. reference to hash of any new or updated access controls.
 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
    key = integer (inbound ID)
-   value = uniqueID  
+   value = uniqueID
+
+=item *
+
+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,
+group bulletin boards).
+
+Args: (first three required; six others optional)
+
+1. prefix (alphanumeric): of keys in hash, e.g., suppsequence, docspage,
+   docssequence, or name of group
+
+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;
+   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
+   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
+   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
+   retrying); default is 3.
+
+9. maxtries: number of attempts to obtain a unique suffix; default is 20.
+
+Returns:
+
+1. suffix obtained (numeric)
+
+2. result of deleting locking key (ok if deleted, or lock never obtained)
+
+3. error: contains (localized) error message if an error occurred.
+
 
 =back