--- loncom/interface/loncommon.pm	2016/07/18 19:28:58	1.1250
+++ loncom/interface/loncommon.pm	2019/11/20 22:53:32	1.1334
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1250 2016/07/18 19:28:58 raeburn Exp $
+# $Id: loncommon.pm,v 1.1334 2019/11/20 22:53:32 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -71,6 +71,8 @@ use Apache::lonuserutils();
 use Apache::lonuserstate();
 use Apache::courseclassifier();
 use LONCAPA qw(:DEFAULT :match);
+use LONCAPA::LWPReq;
+use HTTP::Request;
 use DateTime::TimeZone;
 use DateTime::Locale;
 use Encode();
@@ -83,6 +85,10 @@ use Crypt::DES;
 use DynaLoader; # for Crypt::DES version
 use MIME::Lite;
 use MIME::Types;
+use File::Copy();
+use File::Path();
+use String::CRC32();
+use Short::URL();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -198,7 +204,7 @@ BEGIN {
     {
         my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                                    '/language.tab';
-        if ( open(my $fh,"<$langtabfile") ) {
+        if ( open(my $fh,'<',$langtabfile) ) {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
@@ -220,7 +226,7 @@ BEGIN {
     {
         my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                                   '/copyright.tab';
-        if ( open (my $fh,"<$copyrightfile") ) {
+        if ( open (my $fh,'<',$copyrightfile) ) {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
@@ -234,7 +240,7 @@ BEGIN {
     {
         my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                                   '/source_copyright.tab';
-        if ( open (my $fh,"<$sourcecopyrightfile") ) {
+        if ( open (my $fh,'<',$sourcecopyrightfile) ) {
             while (my $line = <$fh>) {
                 next if ($line =~ /^\#/);
                 chomp($line);
@@ -248,7 +254,7 @@ BEGIN {
 # -------------------------------------------------------------- default domain designs
     my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
     my $designfile = $designdir.'/default.tab';
-    if ( open (my $fh,"<$designfile") ) {
+    if ( open (my $fh,'<',$designfile) ) {
         while (my $line = <$fh>) {
             next if ($line =~ /^\#/);
             chomp($line);
@@ -262,12 +268,12 @@ BEGIN {
     {
         my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                                   '/filecategories.tab';
-        if ( open (my $fh,"<$categoryfile") ) {
+        if ( open (my $fh,'<',$categoryfile) ) {
 	    while (my $line = <$fh>) {
 		next if ($line =~ /^\#/);
 		chomp($line);
                 my ($extension,$category)=(split(/\s+/,$line,2));
-                push @{$category_extensions{lc($category)}},$extension;
+                push(@{$category_extensions{lc($category)}},$extension);
             }
             close($fh);
         }
@@ -277,7 +283,7 @@ BEGIN {
     {
         my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                '/filetypes.tab';
-        if ( open (my $fh,"<$typesfile") ) {
+        if ( open (my $fh,'<',$typesfile) ) {
             while (my $line = <$fh>) {
 		next if ($line =~ /^\#/);
 		chomp($line);
@@ -943,8 +949,8 @@ ENDSCRT
 }
 
 sub select_timezone {
-   my ($name,$selected,$onchange,$includeempty)=@_;
-   my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+   my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+   my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
    if ($includeempty) {
        $output .= '<option value=""';
        if (($selected eq '') || ($selected eq 'local')) {
@@ -965,8 +971,8 @@ sub select_timezone {
 }
 
 sub select_datelocale {
-    my ($name,$selected,$onchange,$includeempty)=@_;
-    my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+    my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+    my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
     if ($includeempty) {
         $output .= '<option value=""';
         if ($selected eq '') {
@@ -1018,7 +1024,7 @@ sub select_datelocale {
 }
 
 sub select_language {
-    my ($name,$selected,$includeempty) = @_;
+    my ($name,$selected,$includeempty,$noedit) = @_;
     my %langchoices;
     if ($includeempty) {
         %langchoices = ('' => 'No language preference');
@@ -1030,7 +1036,7 @@ sub select_language {
         }
     }
     %langchoices = &Apache::lonlocal::texthash(%langchoices);
-    return &select_form($selected,$name,\%langchoices);
+    return &select_form($selected,$name,\%langchoices,undef,$noedit);
 }
 
 =pod
@@ -1054,7 +1060,7 @@ sub list_languages {
 	if ($code) {
 	    my $selector    = $supported_codes{$id};
 	    my $description = &plainlanguagedescription($id);
-	    push (@lang_choices, [$selector, $description]);
+	    push(@lang_choices, [$selector, $description]);
 	}
     }
     return \@lang_choices;
@@ -1176,7 +1182,7 @@ sub linked_select_forms {
         $result.="select2data${suffix}['d_$s1'].texts = new Array(";        
         my @s2texts;
         foreach my $value (@s2values) {
-            push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
+            push(@s2texts, $hashref->{$s1}->{'select2'}->{$value});
         }
         $result.="\"@s2texts\");\n";
     }
@@ -1292,9 +1298,13 @@ sub help_open_topic {
     }
 
     # Add the text
+    my $target = ' target="_top"';
+    if (($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) {
+        $target = '';
+    }
     if ($text ne "") {	
 	$template.='<span class="LC_help_open_topic">'
-                  .'<a target="_top" href="'.$link.'">'
+                  .'<a'.$target.' href="'.$link.'">'
                   .$text.'</a>';
     }
 
@@ -1304,7 +1314,7 @@ sub help_open_topic {
     if ($imgid ne '') {
         $imgid = ' id="'.$imgid.'"';
     }
-    $template.=' <a target="_top" href="'.$link.'" title="'.$title.'">'
+    $template.=' <a'.$target.' href="'.$link.'" title="'.$title.'">'
               .'<img src="'.$helpicon.'" border="0"'
               .' alt="'.&mt('Help: [_1]',$topic).'"'
               .' title="'.$title.'" style="vertical-align:middle;"'.$imgid 
@@ -1497,19 +1507,24 @@ sub help_open_bug {
     {
 	$link = $url;
     }
+
+    my $target = ' target="_top"';
+    if (($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) {
+        $target = '';
+    }
     # Add the text
     if ($text ne "")
     {
 	$template .= 
   "<table bgcolor='#AA3333' cellspacing='1' cellpadding='1' border='0'><tr>".
-  "<td bgcolor='#FF5555'><a target=\"_top\" href=\"$link\"><span style=\"color:#FFFFFF;font-size:10pt;\">$text</span></a>";
+  "<td bgcolor='#FF5555'><a".$target." href=\"$link\"><span style=\"color:#FFFFFF;font-size:10pt;\">$text</span></a>";
     }
 
     # Add the graphic
     my $title = &mt('Report a Bug');
     my $bugicon=&lonhttpdurl("/adm/lonMisc/smallBug.gif");
     $template .= <<"ENDTEMPLATE";
- <a target="_top" href="$link" title="$title"><img src="$bugicon" border="0" alt="(Bug: $topic)" /></a>
+ <a$target href="$link" title="$title"><img src="$bugicon" border="0" alt="(Bug: $topic)" /></a>
 ENDTEMPLATE
     if ($text ne '') { $template.='</td></tr></table>' };
     return $template;
@@ -2185,7 +2200,7 @@ sub crsauthor_url {
 }
 
 sub import_crsauthor_form {
-    my ($form,$firstselectname,$secondselectname,$onchangefirst,$only,$suffix) = @_;
+    my ($form,$firstselectname,$secondselectname,$onchangefirst,$only,$suffix,$disabled) = @_;
     return (0) unless ($env{'request.course.id'});
     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
@@ -2220,6 +2235,7 @@ sub import_crsauthor_form {
                 }
                 my @ordered = ();
                 foreach my $file (sort { lc($a) cmp lc($b) } (keys(%{$files{$key}}))) {
+                    next if ($file =~ /\.rights$/);
                     if ($only) {
                         my ($ext) = ($file =~ /\.([^.]+)$/);
                         unless ($possexts{lc($ext)}) {
@@ -2263,11 +2279,13 @@ sub import_crsauthor_form {
                 unless ($possexts{lc($ext)}) {
                     next;
                 }
+            } else {
+                next if ($file =~ /\.rights$/);
             }
             push(@singledirfiles,$file);
         }
         if (@singledirfiles) {
-            $possdirs == 1;
+            $possdirs = 1;
         }
     }
     if (($possdirs == 1) && (@singledirfiles)) {
@@ -2476,10 +2494,24 @@ sub create_text_file {
 # ------------------------------------------
 
 sub domain_select {
-    my ($name,$value,$multiple)=@_;
+    my ($name,$value,$multiple,$incdoms,$excdoms)=@_;
+    my @possdoms;
+    if (ref($incdoms) eq 'ARRAY') {
+        @possdoms = @{$incdoms};
+    } else {
+        @possdoms = &Apache::lonnet::all_domains();
+    }
+
     my %domains=map { 
 	$_ => $_.' '. &Apache::lonnet::domain($_,'description') 
-    } &Apache::lonnet::all_domains();
+    } @possdoms;
+
+    if ((ref($excdoms) eq 'ARRAY') && (@{$excdoms} > 0)) {
+        foreach my $dom (@{$excdoms}) {
+            delete($domains{$dom});
+        }
+    }
+
     if ($multiple) {
 	$domains{''}=&mt('Any domain');
 	$domains{'select_form_order'} = [sort {lc($a) cmp lc($b) } (keys(%domains))];
@@ -2548,12 +2580,15 @@ sub multiple_select_form {
 
 =pod
 
-=item * &select_form($defdom,$name,$hashref,$onchange)
+=item * &select_form($defdom,$name,$hashref,$onchange,$readonly)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select options from a ref to a hash containing:
 option_name => displayed text. An optional $onchange can include
-a javascript onchange item, e.g., onchange="this.form.submit();"  
+a javascript onchange item, e.g., onchange="this.form.submit();".
+An optional arg -- $readonly -- if true will cause the select form
+to be disabled, e.g., for the case where an instructor has a section-
+specific role, and is viewing/modifying parameters. 
 
 See lonrights.pm for an example invocation and use.
 
@@ -2739,7 +2774,7 @@ sub select_level_form {
 
 =pod
 
-=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms)
+=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select the domain to preform an operation in.  
@@ -2756,14 +2791,19 @@ The optional $incdoms is a reference to
 
 The optional $excdoms is a reference to an array of domains which will be excluded from the available options.
 
+The optional $disabled argument, if true, adds the disabled attribute to the select tag.
+
 =cut
 
 #-------------------------------------------
 sub select_dom_form {
-    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms) = @_;
+    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled) = @_;
     if ($onchange) {
         $onchange = ' onchange="'.$onchange.'"';
     }
+    if ($disabled) {
+        $disabled = ' disabled="disabled"';
+    }
     my (@domains,%exclude);
     if (ref($incdoms) eq 'ARRAY') {
         @domains = sort {lc($a) cmp lc($b)} (@{$incdoms});
@@ -2774,7 +2814,7 @@ sub select_dom_form {
     if (ref($excdoms) eq 'ARRAY') {
         map { $exclude{$_} = 1; } @{$excdoms}; 
     }
-    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange>\n";
+    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange$disabled>\n";
     foreach my $dom (@domains) {
         next if ($exclude{$dom});
         $selectdomain.="<option value=\"$dom\" ".
@@ -3000,6 +3040,8 @@ This is not an optimal method, but it wo
 
 =item * authform_filesystem
 
+=item * authform_lti
+
 =back
 
 See loncreateuser.pm for invocation and use examples.
@@ -3150,13 +3192,16 @@ sub authform_kerberos {
               @_,
               );
     my ($check4,$check5,$krbcheck,$krbarg,$krbver,$result,$authtype,
-        $autharg,$jscall);
+        $autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
     if ($in{'kerb_def_auth'} eq 'krb5') {
        $check5 = ' checked="checked"';
     } else {
        $check4 = ' checked="checked"';
     }
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     $krbarg = $in{'kerb_def_dom'};
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'krb') {
@@ -3201,7 +3246,7 @@ sub authform_kerberos {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="krb" />';
+                    $authtype = '<input type="radio" name="login" value="krb"'.$disabled.' />';
                 }
             }
         }
@@ -3210,7 +3255,7 @@ sub authform_kerberos {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="krb" '.
                     'onclick="'.$jscall.'" onchange="'.$jscall.'"'.
-                    $krbcheck.' />';
+                    $krbcheck.$disabled.' />';
     }
     if (($can_assign{'krb4'} && $can_assign{'krb5'}) ||
         ($can_assign{'krb4'} && !$can_assign{'krb5'} &&
@@ -3223,9 +3268,9 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
-         '<label><input type="radio" name="krbver" value="4" '.$check4.' />',
-         '</label><label><input type="radio" name="krbver" value="5" '.$check5.' />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
+         '<label><input type="radio" name="krbver" value="4" '.$check4.$disabled.' />',
+         '</label><label><input type="radio" name="krbver" value="5" '.$check5.$disabled.' />',
 	 '</label>');
     } elsif ($can_assign{'krb4'}) {
         $result .= &mt
@@ -3234,7 +3279,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="4" />',
          '</label>');
     } elsif ($can_assign{'krb5'}) {
@@ -3244,7 +3289,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="5" />',
          '</label>');
     }
@@ -3257,8 +3302,11 @@ sub authform_internal {
                 kerb_def_dom => 'MSU.EDU',
                 @_,
                 );
-    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall);
+    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'int') {
             if ($can_assign{'int'}) {
@@ -3287,7 +3335,7 @@ sub authform_internal {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="int" />';
+                    $authtype = '<input type="radio" name="login" value="int"'.$disabled.' />';
                 }
             }
         }
@@ -3295,14 +3343,14 @@ sub authform_internal {
     $jscall = "javascript:changed_radio('int',$in{'formname'});";
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="int" '.$intcheck.
-                    ' onchange="'.$jscall.'" onclick="'.$jscall.'" />';
+                    ' onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="password" size="10" name="intarg" value="'.
-               $intarg.'" onchange="'.$jscall.'" />';
+               $intarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Internally authenticated (with initial password [_2])',
          '<label>'.$authtype,'</label>'.$autharg);
-    $result.="<label><input type=\"checkbox\" name=\"visible\" onclick='if (this.checked) { this.form.intarg.type=\"text\" } else { this.form.intarg.type=\"password\" }' />".&mt('Visible input').'</label>';
+    $result.='<label><input type="checkbox" name="visible" onclick="if (this.checked) { this.form.intarg.type='."'text'".' } else { this.form.intarg.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>';
     return $result;
 }
 
@@ -3312,8 +3360,11 @@ sub authform_local {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall);
+    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    } 
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'loc') {
             if ($can_assign{'loc'}) {
@@ -3342,7 +3393,7 @@ sub authform_local {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="loc" />';
+                    $authtype = '<input type="radio" name="login" value="loc"'.$disabled.' />';
                 }
             }
         }
@@ -3351,10 +3402,10 @@ sub authform_local {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="loc" '.
                     $loccheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="text" size="10" name="locarg" value="'.
-               $locarg.'" onchange="'.$jscall.'" />';
+               $locarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt('[_1] Local Authentication with argument [_2]',
                   '<label>'.$authtype,'</label>'.$autharg);
     return $result;
@@ -3366,8 +3417,11 @@ sub authform_filesystem {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($fsyscheck,$result,$authtype,$autharg,$jscall);
+    my ($fsyscheck,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'fsys') {
             if ($can_assign{'fsys'}) {
@@ -3380,7 +3434,7 @@ sub authform_filesystem {
             } else {
                 $result = &mt('Currently Filesystem Authenticated.');
                 return $result;
-            }           
+            }
         }
     } else {
         if ($authnum == 1) {
@@ -3393,7 +3447,7 @@ sub authform_filesystem {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="fsys" />';
+                    $authtype = '<input type="radio" name="login" value="fsys"'.$disabled.' />';
                 }
             }
         }
@@ -3402,16 +3456,71 @@ sub authform_filesystem {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="fsys" '.
                     $fsyscheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
-    $autharg = '<input type="text" size="10" name="fsysarg" value=""'.
-               ' onchange="'.$jscall.'" />';
+    $autharg = '<input type="password" size="10" name="fsysarg" value=""'.
+               ' onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Filesystem Authenticated (with initial password [_2])',
-         '<label><input type="radio" name="login" value="fsys" '.
-         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
-         '</label><input type="password" size="10" name="fsysarg" value="" '.
-                  'onchange="'.$jscall.'" />');
+         '<label>'.$authtype,'</label>'.$autharg);
+    return $result;
+}
+
+sub authform_lti {
+    my %in = (
+              formname => 'document.cu',
+              kerb_def_dom => 'MSU.EDU',
+              @_,
+              );
+    my ($lticheck,$result,$authtype,$autharg,$jscall,$disabled);
+    my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
+    if (defined($in{'curr_authtype'})) {
+        if ($in{'curr_authtype'} eq 'lti') {
+            if ($can_assign{'lti'}) {
+                $lticheck = 'checked="checked" ';
+                if (defined($in{'mode'})) {
+                    if ($in{'mode'} eq 'modifyuser') {
+                        $lticheck = '';
+                    }
+                }
+            } else {
+                $result = &mt('Currently LTI Authenticated.');
+                return $result;
+            }
+        }
+    } else {
+        if ($authnum == 1) {
+            $authtype = '<input type="hidden" name="login" value="lti" />';
+        }
+    }
+    if (!$can_assign{'lti'}) {
+        return;
+    } elsif ($authtype eq '') {
+        if (defined($in{'mode'})) {
+            if ($in{'mode'} eq 'modifycourse') {
+                if ($authnum == 1) {
+                    $authtype = '<input type="radio" name="login" value="lti"'.$disabled.' />';
+                }
+            }
+        }
+    }
+    $jscall = "javascript:changed_radio('lti',$in{'formname'});";
+    if (($authtype eq '') && (($in{'mode'} eq 'modifycourse') || ($in{'curr_authtype'} ne 'lti'))) {
+        $authtype = '<input type="radio" name="login" value="lti" '.
+                    $lticheck.' onchange="'.$jscall.'" onclick="'.
+                    $jscall.'"'.$disabled.' />';
+    }
+    $autharg = '<input type="hidden" name="ltiarg" value="" />';
+    if ($authtype) {
+        $result = &mt('[_1] LTI Authenticated',
+                      '<label>'.$authtype.'</label>'.$autharg);
+    } else {
+        $result = '<b>'.&mt('LTI Authenticated').'</b>'.
+                  $autharg;
+    }
     return $result;
 }
 
@@ -3425,6 +3534,7 @@ sub get_assignable_auth {
                           krb5 => 1,
                           int  => 1,
                           loc  => 1,
+                          lti  => 1,
                      );
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$dom);
     if (ref($domconfig{'usercreation'}) eq 'HASH') {
@@ -3433,7 +3543,7 @@ sub get_assignable_auth {
             my $context;
             if ($env{'request.role'} =~ /^au/) {
                 $context = 'author';
-            } elsif ($env{'request.role'} =~ /^dc/) {
+            } elsif ($env{'request.role'} =~ /^(dc|dh)/) {
                 $context = 'domain';
             } elsif ($env{'request.course.id'}) {
                 $context = 'course';
@@ -3457,6 +3567,79 @@ sub get_assignable_auth {
     return ($authnum,%can_assign);
 }
 
+sub check_passwd_rules {
+    my ($domain,$plainpass) = @_;
+    my %passwdconf = &Apache::lonnet::get_passwdconf($domain);
+    my ($min,$max,@chars,@brokerule,$warning);
+    $min = $Apache::lonnet::passwdmin;
+    if (ref($passwdconf{'chars'}) eq 'ARRAY') {
+        if ($passwdconf{'min'} =~ /^\d+$/) {
+            if ($passwdconf{'min'} > $min) {
+                $min = $passwdconf{'min'};
+            }
+        }
+        if ($passwdconf{'max'} =~ /^\d+$/) {
+            $max = $passwdconf{'max'};
+        }
+        @chars = @{$passwdconf{'chars'}};
+    }
+    if (($min) && (length($plainpass) < $min)) {
+        push(@brokerule,'min');
+    }
+    if (($max) && (length($plainpass) > $max)) {
+        push(@brokerule,'max');
+    }
+    if (@chars) {
+        my %rules;
+        map { $rules{$_} = 1; } @chars;
+        if ($rules{'uc'}) {
+            unless ($plainpass =~ /[A-Z]/) {
+                push(@brokerule,'uc');
+            }
+        }
+        if ($rules{'lc'}) {
+            unless ($plainpass =~ /[a-z]/) {
+                push(@brokerule,'lc');
+            }
+        }
+        if ($rules{'num'}) {
+            unless ($plainpass =~ /\d/) {
+                push(@brokerule,'num');
+            }
+        }
+        if ($rules{'spec'}) {
+            unless ($plainpass =~ /[!"#$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~]/) {
+                push(@brokerule,'spec');
+            }
+        }
+    }
+    if (@brokerule) {
+        my %rulenames = &Apache::lonlocal::texthash(
+            uc   => 'At least one upper case letter',
+            lc   => 'At least one lower case letter',
+            num  => 'At least one number',
+            spec => 'At least one non-alphanumeric',
+        );
+        $rulenames{'uc'} .= ': ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+        $rulenames{'lc'} .= ': abcdefghijklmnopqrstuvwxyz';
+        $rulenames{'num'} .= ': 0123456789';
+        $rulenames{'spec'} .= ': !&quot;\#$%&amp;\'()*+,-./:;&lt;=&gt;?@[\]^_\`{|}~';
+        $rulenames{'min'} = &mt('Minimum password length: [_1]',$min);
+        $rulenames{'max'} = &mt('Maximum password length: [_1]',$max);
+        $warning = &mt('Password did not satisfy the following:').'<ul>';
+        foreach my $rule ('min','max','uc','ls','num','spec') {
+            if (grep(/^$rule$/,@brokerule)) {
+                $warning .= '<li>'.$rulenames{$rule}.'</li>';
+            }
+        }
+        $warning .= '</ul>';
+    }
+    if (wantarray) {
+        return @brokerule;
+    }
+    return $warning;
+}
+
 ###############################################################
 ##    Get Kerberos Defaults for Domain                 ##
 ###############################################################
@@ -4542,9 +4725,15 @@ sub get_previous_attempt {
       }
       $prevattempts.= &end_data_table_row().&end_data_table();
     } else {
+      my $msg;
+      if ($symb =~ /ext\.tool$/) {
+          $msg = &mt('No grade passed back.');
+      } else {
+          $msg = &mt('Nothing submitted - no attempts.');
+      }
       $prevattempts=
 	  &start_data_table().&start_data_table_row().
-	  '<td>'.&mt('Nothing submitted - no attempts.').'</td>'.
+	  '<td>'.$msg.'</td>'.
 	  &end_data_table_row().&end_data_table();
     }
   } else {
@@ -4649,6 +4838,9 @@ sub get_student_view {
   }
   if (defined($target)) { $form{'grade_target'} = $target; }
   $feedurl=&Apache::lonnet::clutter($feedurl);
+  if (($feedurl =~ /ext\.tool$/) && ($target eq 'tex')) {
+      $feedurl =~ s{^/adm/wrapper}{};
+  }
   my ($userview,$response)=&Apache::lonnet::ssi_body($feedurl,%form);
   $userview=~s/\<body[^\>]*\>//gi;
   $userview=~s/\<\/body\>//gi;
@@ -4971,7 +5163,8 @@ sub blockcheck {
     # boards, chat or groups, check for blocking in current course only.
 
     if (($activity eq 'boards' || $activity eq 'chat' ||
-         $activity eq 'groups' || $activity eq 'printout') &&
+         $activity eq 'groups' || $activity eq 'printout' ||
+         $activity eq 'reinit' || $activity eq 'alert') &&
         ($env{'request.course.id'})) {
         foreach my $key (keys(%live_courses)) {
             if ($key ne $env{'request.course.id'}) {
@@ -5055,7 +5248,7 @@ sub blockcheck {
                                                                 $tdom,$spec,$trest,$area);
                         }
                     }
-                    my ($author,$adv) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
+                    my ($author,$adv,$rar) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
                     if ($userroles{'user.priv.'.$checkrole} =~ /evb\&([^\:]*)/) {
                         if ($1) {
                             $no_userblock = 1;
@@ -5077,9 +5270,9 @@ sub blockcheck {
                  ($env{'request.role'} !~ m{^st\./\Q$cdom\E/\Q$cnum\E}));
         next if ($no_userblock);
 
-        # Retrieve blocking times and identity of locker for course
+        # Retrieve blocking times and identity of blocker for course
         # of specified user, unless user has 'evb' privilege.
-        
+
         my ($start,$end,$trigger) = 
             &get_blocks($setters,$activity,$cdom,$cnum,$url);
         if (($start != 0) && 
@@ -5166,13 +5359,19 @@ sub get_blocks {
                 my $end = $start + $env{'course.'.$cdom.'_'.$cnum.'.timerinterval.'.$timersymb}; 
                 if ($start && $end) {
                     if (($start <= time) && ($end >= time)) {
-                        unless (grep(/^\Q$block\E$/,@blockers)) {
-                            push(@blockers,$block);
-                            $triggered{$block} = {
-                                                   start => $start,
-                                                   end   => $end,
-                                                   type  => $type,
-                                                 };
+                        if (ref($commblocks{$block}) eq 'HASH') {
+                            if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
+                                if ($commblocks{$block}{'blocks'}{$activity} eq 'on') {
+                                    unless(grep(/^\Q$block\E$/,@blockers)) {
+                                        push(@blockers,$block);
+                                        $triggered{$block} = {
+                                                               start => $start,
+                                                               end   => $end,
+                                                               type  => $type,
+                                                             };
+                                    }
+                                }
+                            }
                         }
                     }
                 }
@@ -5282,6 +5481,10 @@ END_MYBLOCK
         $text = &mt('Printing Blocked');
     } elsif ($activity eq 'passwd') {
         $text = &mt('Password Changing Blocked');
+    } elsif ($activity eq 'alert') {
+        $text = &mt('Checking Critical Messages Blocked');
+    } elsif ($activity eq 'reinit') {
+        $text = &mt('Checking Course Update Blocked');
     }
     $output .= <<"END_BLOCK";
 <div class='$class'>
@@ -5306,7 +5509,7 @@ sub check_ip_acc {
         return 1;
     }
     my $allowed;
-    my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'} || $clientip;
+    my $ip=$ENV{'REMOTE_ADDR'} || $clientip || $env{'request.host'};
 
     my $name;
     my %access = (
@@ -5521,7 +5724,7 @@ sub get_legacy_domconf {
     my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
     my $designfile =  $designdir.'/'.$udom.'.tab';
     if (-e $designfile) {
-        if ( open (my $fh,"<$designfile") ) {
+        if ( open (my $fh,'<',$designfile) ) {
             while (my $line = <$fh>) {
                 next if ($line =~ /^\#/);
                 chomp($line);
@@ -5720,13 +5923,18 @@ sub CSTR_pageheader {
         $title = &mt('Authoring Space');
     }
 
+    my ($target,$crumbtarget) = (' target="_top"','_top'); #FIXME lonpubdir: target="_parent"
+    if (($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) {
+        $target = '';
+        $crumbtarget = '';
+    }
+
     my $output =
          '<div>'
         .&Apache::loncommon::help_open_menu('','',3,'Authoring') #FIXME: Broken? Where is it?
         .'<b>'.$title.'</b> '
-        .'<form name="dirs" method="post" action="'.$formaction
-        .'" target="_top">' #FIXME lonpubdir: target="_parent"
-        .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv/'.$udom,undef,undef);
+        .'<form name="dirs" method="post" action="'.$formaction.'"'.$target.'>'
+        .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,$crumbtarget,'/priv/'.$udom,undef,undef);
 
     if ($lastitem) {
         $output .=
@@ -5740,7 +5948,7 @@ sub CSTR_pageheader {
     } else {
         $output .=
              '<br />'
-            #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/','_top','/priv','','+1',1)."</b></tt><br />"
+            #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/',$crumbtarget,'/priv','','+1',1)."</b></tt><br />"
             .&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
             .'</form>'
             .&Apache::lonmenu::constspaceform();
@@ -5789,11 +5997,28 @@ Inputs:
 
 =item * $args, optional argument valid values are
             no_auto_mt_title -> prevents &mt()ing the title arg
+            use_absolute     -> for external resource or syllabus, this will
+                                contain https://<hostname> if server uses
+                                https (as per hosts.tab), but request is for http
+            hostname         -> hostname, from $r->hostname().
 
 =item * $advtoolsref, optional argument, ref to an array containing
             inlineremote items to be added in "Functions" menu below
             breadcrumbs.
 
+=item * $ltiscope, optional argument, will be one of: resource, map or
+            course, if LON-CAPA is in LTI Provider context. Value is
+            the scope of use, i.e., launch was for access to a single, a map
+            or the entire course.
+
+=item * $ltiuri, optional argument, if LON-CAPA is in LTI Provider
+            context, this will contain the URL for the landing item in
+            the course, after launch from an LTI Consumer
+
+=item * $ltimenu, optional argument, if LON-CAPA is in LTI Provider
+            context, this will contain a reference to hash of items
+            to be included in the page header and/or inline menu.
+
 =back
 
 Returns: A uniform header for LON-CAPA web pages.  
@@ -5805,7 +6030,7 @@ other decorations will be returned.
 
 sub bodytag {
     my ($title,$function,$addentries,$bodyonly,$domain,$forcereg,
-        $no_nav_bar,$bgcolor,$args,$advtoolsref)=@_;
+        $no_nav_bar,$bgcolor,$args,$advtoolsref,$ltiscope,$ltiuri,$ltimenu)=@_;
 
     my $public;
     if ((($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public'))
@@ -5814,6 +6039,7 @@ sub bodytag {
     }
     if (!$args->{'no_auto_mt_title'}) { $title = &mt($title); }
     my $httphost = $args->{'use_absolute'};
+    my $hostname = $args->{'hostname'};
 
     $function = &get_users_function() if (!$function);
     my $img =    &designparm($function.'.img',$domain);
@@ -5841,6 +6067,14 @@ sub bodytag {
     if ($env{'request.course.id'}) {
         if ($env{'request.role'} !~ /^cr/) {
             $role = &Apache::lonnet::plaintext($role,&course_type());
+        } elsif ($role =~ m{^cr/($match_domain)/\1-domainconfig/(\w+)$}) {
+            if ($env{'request.role.desc'}) {
+                $role = $env{'request.role.desc'};
+            } else {
+                $role = &mt('Helpdesk[_1]','&nbsp;'.$2);
+            }
+        } else {
+            $role = (split(/\//,$role,4))[-1]; 
         }
         if ($env{'request.course.sec'}) {
             $role .= ('&nbsp;'x2).'-&nbsp;'.&mt('section:').'&nbsp;'.$env{'request.course.sec'};
@@ -5867,7 +6101,18 @@ sub bodytag {
     if ($public) {
 	undef($role);
     }
-    
+
+    if (($env{'request.course.id'}) && ($env{'request.lti.login'})) {
+        if (ref($ltimenu) eq 'HASH') {
+            unless ($ltimenu->{'role'}) {
+                undef($role);
+            }
+            unless ($ltimenu->{'coursetitle'}) {
+                $realm='&nbsp;';
+            }
+        }
+    }
+
     my $titleinfo = '<h1>'.$title.'</h1>';
     #
     # Extra info if you are the DC
@@ -5901,27 +6146,29 @@ sub bodytag {
         $bodytag .= Apache::lonhtmlcommon::scripttag(
             Apache::lonmenu::utilityfunctions($httphost), 'start');
 
-        my ($left,$right) = Apache::lonmenu::primary_menu($crstype);
+        unless ($args->{'no_primary_menu'}) {
+            my ($left,$right) = Apache::lonmenu::primary_menu($crstype,$ltimenu);
 
-        if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) {
-             if ($dc_info) {
-                 $dc_info = qq|<span class="LC_cusr_subheading">$dc_info</span>|;
-             }
-             $bodytag .= qq|<div id="LC_nav_bar">$left $role<br />
-                <em>$realm</em> $dc_info</div>|;
-            return $bodytag;
-        }
+            if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) {
+                if ($dc_info) {
+                    $dc_info = qq|<span class="LC_cusr_subheading">$dc_info</span>|;
+                }
+                $bodytag .= qq|<div id="LC_nav_bar">$left $role<br />
+                               <em>$realm</em> $dc_info</div>|;
+                return $bodytag;
+            }
 
-        unless ($env{'request.symb'} =~ m/\.page___\d+___/) {
-            $bodytag .= qq|<div id="LC_nav_bar">$left $role</div>|;
-        }
+            unless ($env{'request.symb'} =~ m/\.page___\d+___/) {
+                $bodytag .= qq|<div id="LC_nav_bar">$left $role</div>|;
+            }
 
-        $bodytag .= $right;
+            $bodytag .= $right;
 
-        if ($dc_info) {
-            $dc_info = &dc_courseid_toggle($dc_info);
+            if ($dc_info) {
+                $dc_info = &dc_courseid_toggle($dc_info);
+            }
+            $bodytag .= qq|<div id="LC_realm">$realm $dc_info</div>|;
         }
-        $bodytag .= qq|<div id="LC_realm">$realm $dc_info</div>|;
 
         #if directed to not display the secondary menu, don't.  
         if ($args->{'no_secondary_menu'}) {
@@ -5929,21 +6176,26 @@ sub bodytag {
         }
         #don't show menus for public users
         if (!$public){
-            $bodytag .= Apache::lonmenu::secondary_menu($httphost);
+            unless ($args->{'no_inline_menu'}) {
+                $bodytag .= Apache::lonmenu::secondary_menu($httphost,$ltiscope,$ltimenu,
+                                                            $args->{'no_primary_menu'});
+            }
             $bodytag .= Apache::lonmenu::serverform();
             $bodytag .= Apache::lonhtmlcommon::scripttag('', 'end');
             if ($env{'request.state'} eq 'construct') {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,
-                                $args->{'bread_crumbs'});
+                                $args->{'bread_crumbs'},'','',$hostname,$ltiscope,$ltiuri);
             } elsif ($forcereg) {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
-                                                            $args->{'group'});
+                                                            $args->{'group'},
+                                                            $args->{'hide_buttons'},
+                                                            $hostname,$ltiscope,$ltiuri);
             } else {
                 $bodytag .= 
                     &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
                                                         $forcereg,$args->{'group'},
                                                         $args->{'bread_crumbs'},
-                                                        $advtoolsref);
+                                                        $advtoolsref,'',$hostname);
             }
         }else{
             # this is to seperate menu from content when there's no secondary
@@ -6405,6 +6657,11 @@ td.LC_menubuttons_text {
   background: $tabbg;
 }
 
+td.LC_zero_height {
+  line-height: 0; 
+  cellpadding: 0;
+}
+
 table.LC_data_table {
   border: 1px solid #000000;
   border-collapse: separate;
@@ -6726,6 +6983,12 @@ td.LC_parm_overview_restrictions  {
   border-collapse: collapse;
 }
 
+span.LC_parm_recursive,
+td.LC_parm_recursive {
+  font-weight: bold;
+  font-size: smaller;
+}
+
 table.LC_parm_overview_restrictions td {
   border-width: 1px 4px 1px 4px;
   border-style: solid;
@@ -6995,7 +7258,8 @@ table.LC_prior_tries td {
   padding: 6px;
 }
 
-.LC_answer_unknown {
+.LC_answer_unknown,
+.LC_answer_warning {
   background: orange;
   color: black;
   padding: 6px;
@@ -7077,6 +7341,12 @@ table.LC_data_table tr > td.LC_docs_entr
   color: #990000;
 }
 
+.LC_docs_alias {
+  color: #440055;  
+}
+
+.LC_domprefs_email,
+.LC_docs_alias_name,
 .LC_docs_reinit_warn,
 .LC_docs_ext_edit {
   font-size: x-small;
@@ -8097,6 +8367,39 @@ section.role-warning>h1:before {
   content:url('/adm/daxe/images/section_icons/warning.png');
 }
 
+#LC_minitab_header {
+  float:left;
+  width:100%;
+  background:#DAE0D2 url("/res/adm/pages/minitabmenu_bg.gif") repeat-x bottom;
+  font-size:93%;
+  line-height:normal;
+  margin: 0.5em 0 0.5em 0;
+}
+#LC_minitab_header ul {
+  margin:0;
+  padding:10px 10px 0;
+  list-style:none;
+}
+#LC_minitab_header li {
+  float:left;
+  background:url("/res/adm/pages/minitabmenu_left.gif") no-repeat left top;
+  margin:0;
+  padding:0 0 0 9px;
+}
+#LC_minitab_header a {
+  display:block;
+  background:url("/res/adm/pages/minitabmenu_right.gif") no-repeat right top;
+  padding:5px 15px 4px 6px;
+}
+#LC_minitab_header #LC_current_minitab {
+  background-image:url("/res/adm/pages/minitabmenu_left_on.gif");
+}
+#LC_minitab_header #LC_current_minitab a {
+  background-image:url("/res/adm/pages/minitabmenu_right_on.gif");
+  padding-bottom:5px;
+}
+
+
 END
 }
 
@@ -8289,6 +8592,7 @@ OFFLOAD
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
 <meta name="apple-mobile-web-app-capable" content="yes" />';
     }
+    $result .= '<meta name="google" content="notranslate" />'."\n";
     return $result.'</head>';
 }
 
@@ -8468,8 +8772,14 @@ $args - additional optional args support
              no_auto_mt_title -> prevent &mt()ing the title arg
              bread_crumbs ->             Array containing breadcrumbs
              bread_crumbs_component ->  if exists show it as headline else show only the breadcrumbs
+             bread_crumbs_nomenu -> if true will pass false as the value of $menulink
+                                    to lonhtmlcommon::breadcrumbs
              group          -> includes the current group, if page is for a 
-                               specific group  
+                               specific group
+             use_absolute   -> for request for external resource or syllabus, this
+                               will contain https://<hostname> if server uses
+                               https (as per hosts.tab), but request is for http
+             hostname       -> hostname, originally from $r->hostname(), (optional).
 
 =back
 
@@ -8482,11 +8792,42 @@ sub start_page {
     #&Apache::lonnet::logthis("start_page ".join(':',caller(0)));
 
     $env{'internal.start_page'}++;
-    my ($result,@advtools);
+    my ($result,@advtools,$ltiscope,$ltiuri,%ltimenu);
 
     if (! exists($args->{'skip_phases'}{'head'}) ) {
         $result .= &xml_begin($args->{'frameset'}) . &headtag($title, $head_extra, $args);
     }
+
+    if (($env{'request.course.id'}) && ($env{'request.lti.login'})) {
+        if ($env{'course.'.$env{'request.course.id'}.'.lti.override'}) {
+            unless ($env{'course.'.$env{'request.course.id'}.'.lti.topmenu'}) {
+                $args->{'no_primary_menu'} = 1;
+            }
+            unless ($env{'course.'.$env{'request.course.id'}.'.lti.inlinemenu'}) {
+                $args->{'no_inline_menu'} = 1;
+            }
+            if ($env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'}) {
+                map { $ltimenu{$_} = 1; } split(/,/,$env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'});
+            }
+        } else {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
+            if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') {
+                unless ($lti{$env{'request.lti.login'}}{'topmenu'}) {
+                    $args->{'no_primary_menu'} = 1;
+                }
+                unless ($lti{$env{'request.lti.login'}}{'inlinemenu'}) {
+                    $args->{'no_inline_menu'} = 1;
+                }
+                if (ref($lti{$env{'request.lti.login'}}{'lcmenu'}) eq 'ARRAY') {
+                    map { $ltimenu{$_} = 1; } @{$lti{$env{'request.lti.login'}}{'lcmenu'}};
+                }
+            }
+        }
+        ($ltiscope,$ltiuri) = &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'},
+                                  $env{'course.'.$env{'request.course.id'}.'.domain'},
+                                  $env{'course.'.$env{'request.course.id'}.'.num'});
+    }
     
     if (! exists($args->{'skip_phases'}{'body'}) ) {
 	if ($args->{'frameset'}) {
@@ -8500,7 +8841,7 @@ sub start_page {
                          $args->{'only_body'},      $args->{'domain'},
                          $args->{'force_register'}, $args->{'no_nav_bar'},
                          $args->{'bgcolor'},        $args,
-                         \@advtools);
+                         \@advtools,$ltiscope,$ltiuri,\%ltimenu);
         }
     }
 
@@ -8533,15 +8874,22 @@ sub start_page {
                 if (@advtools > 0) {
                     &Apache::lonmenu::advtools_crumbs(@advtools);
                 }
-
+                my $menulink;
+                # if arg: bread_crumbs_nomenu is true pass 0 as $menulink item.
+                if ((exists($args->{'bread_crumbs_nomenu'})) ||
+                     ($ltiscope eq 'map') || ($ltiscope eq 'resource') ||
+                     ((($args->{'crstype'} eq 'Placement') || (($env{'request.course.id'}) &&
+                     ($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement'))) &&
+                     (!$env{'request.role.adv'}))) {
+                    $menulink = 0;
+                } else {
+                    undef($menulink);
+                }
 		#if bread_crumbs_component exists show it as headline else show only the breadcrumbs
 		if(exists($args->{'bread_crumbs_component'})){
-			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'});
-		} elsif ($args->{'crstype'} eq 'Placement') {
-			$result .= &Apache::lonhtmlcommon::breadcrumbs('','','','','','','','','',
-                                                                       $args->{'crstype'});
+			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'},'',$menulink);
                 } else {
-			$result .= &Apache::lonhtmlcommon::breadcrumbs();
+			$result .= &Apache::lonhtmlcommon::breadcrumbs('','',$menulink);
 		}
     }
     return $result;
@@ -8638,7 +8986,7 @@ var modalWindow = {
 };
 	var openMyModal = function(source,width,height,scrolling,transparency,style)
 	{
-                source = source.replace("'","&#39;");
+                source = source.replace(/'/g,"&#39;");
 		modalWindow.windowId = "myModal";
 		modalWindow.width = width;
 		modalWindow.height = height;
@@ -8767,8 +9115,9 @@ sub end_togglebox {
 }
 
 sub LCprogressbar_script {
-   my ($id)=@_;
-   return(<<ENDPROGRESS);
+   my ($id,$number_to_do)=@_;
+   if ($number_to_do) {
+       return(<<ENDPROGRESS);
 <script type="text/javascript">
 // <![CDATA[
 \$('#progressbar$id').progressbar({
@@ -8781,21 +9130,43 @@ sub LCprogressbar_script {
 // ]]>
 </script>
 ENDPROGRESS
+   } else {
+       return(<<ENDPROGRESS);
+<script type="text/javascript">
+// <![CDATA[
+\$('#progressbar$id').progressbar({
+  value: false,
+  create: function(event, ui) {
+    \$('.ui-widget-header', this).css({'background':'#F0F0F0'});
+    \$('.ui-progressbar-overlay', this).css({'margin':'0'});
+  }
+});
+// ]]>
+</script>
+ENDPROGRESS
+   }
 }
 
 sub LCprogressbarUpdate_script {
    return(<<ENDPROGRESSUPDATE);
 <style type="text/css">
 .ui-progressbar { position:relative; }
+.progress-label {position: absolute; width: 100%; text-align: center; top: 1px; font-weight: bold; text-shadow: 1px 1px 0 #fff;margin: 0; line-height: 200%; }
 .pblabel { position: absolute; width: 100%; text-align: center; line-height: 1.9em; }
 </style>
 <script type="text/javascript">
 // <![CDATA[
 var LCprogressTxt='---';
 
-function LCupdateProgress(percent,progresstext,id) {
+function LCupdateProgress(percent,progresstext,id,maxnum) {
    LCprogressTxt=progresstext;
-   \$('#progressbar'+id).progressbar('value',percent);
+   if ((maxnum == '') || (maxnum == undefined) || (maxnum == null)) {
+       \$('#progressbar'+id).find('.progress-label').text(LCprogressTxt);
+   } else if (percent === \$('#progressbar'+id).progressbar( "value" )) {
+       \$('#progressbar'+id).find('.pblabel').text(LCprogressTxt);
+   } else {
+       \$('#progressbar'+id).progressbar('value',percent);
+   }
 }
 // ]]>
 </script>
@@ -8807,37 +9178,54 @@ my $LCidcnt;
 my $LCcurrentid;
 
 sub LCprogressbar {
-    my ($r)=(@_);
+    my ($r,$number_to_do,$preamble)=@_;
     $LClastpercent=0;
     $LCidcnt++;
     $LCcurrentid=$$.'_'.$LCidcnt;
-    my $starting=&mt('Starting');
-    my $content=(<<ENDPROGBAR);
+    my ($starting,$content);
+    if ($number_to_do) {
+        $starting=&mt('Starting');
+        $content=(<<ENDPROGBAR);
+$preamble
   <div id="progressbar$LCcurrentid">
     <span class="pblabel">$starting</span>
   </div>
 ENDPROGBAR
-    &r_print($r,$content.&LCprogressbar_script($LCcurrentid));
+    } else {
+        $starting=&mt('Loading...');
+        $LClastpercent='false';
+        $content=(<<ENDPROGBAR);
+$preamble
+  <div id="progressbar$LCcurrentid">
+      <div class="progress-label">$starting</div>
+  </div>
+ENDPROGBAR
+    }
+    &r_print($r,$content.&LCprogressbar_script($LCcurrentid,$number_to_do));
 }
 
 sub LCprogressbarUpdate {
-    my ($r,$val,$text)=@_;
-    unless ($val) { 
-       if ($LClastpercent) {
-           $val=$LClastpercent;
-       } else {
-           $val=0;
-       }
+    my ($r,$val,$text,$number_to_do)=@_;
+    if ($number_to_do) {
+        unless ($val) { 
+            if ($LClastpercent) {
+                $val=$LClastpercent;
+            } else {
+                $val=0;
+            }
+        }
+        if ($val<0) { $val=0; }
+        if ($val>100) { $val=0; }
+        $LClastpercent=$val;
+        unless ($text) { $text=$val.'%'; }
+    } else {
+        $val = 'false';
     }
-    if ($val<0) { $val=0; }
-    if ($val>100) { $val=0; }
-    $LClastpercent=$val;
-    unless ($text) { $text=$val.'%'; }
     $text=&js_ready($text);
     &r_print($r,<<ENDUPDATE);
 <script type="text/javascript">
 // <![CDATA[
-LCupdateProgress($val,'$text','$LCcurrentid');
+LCupdateProgress($val,'$text','$LCcurrentid','$number_to_do');
 // ]]>
 </script>
 ENDUPDATE
@@ -9022,14 +9410,21 @@ function expand_div(caller) {
 
 sub simple_error_page {
     my ($r,$title,$msg,$args) = @_;
+    my %displayargs;
     if (ref($args) eq 'HASH') {
         if (!$args->{'no_auto_mt_msg'}) { $msg = &mt($msg); }
+        if ($args->{'only_body'}) {
+            $displayargs{'only_body'} = 1;
+        }
+        if ($args->{'no_nav_bar'}) {
+            $displayargs{'no_nav_bar'} = 1;
+        }
     } else {
         $msg = &mt($msg);
     }
 
     my $page =
-	&Apache::loncommon::start_page($title).
+	&Apache::loncommon::start_page($title,'',\%displayargs).
 	'<p class="LC_error">'.$msg.'</p>'.
 	&Apache::loncommon::end_page();
     if (ref($r)) {
@@ -9957,8 +10352,24 @@ sub get_secgrprole_info {
 }
 
 sub user_picker {
-    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context) = @_;
+    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom,$noinstd) = @_;
     my $currdom = $dom;
+    my @alldoms = &Apache::lonnet::all_domains();
+    if (@alldoms == 1) {
+        my %domsrch = &Apache::lonnet::get_dom('configuration',
+                                               ['directorysrch'],$alldoms[0]);
+        my $domdesc = &Apache::lonnet::domain($alldoms[0],'description');
+        my $showdom = $domdesc;
+        if ($showdom eq '') {
+            $showdom = $dom;
+        }
+        if (ref($domsrch{'directorysrch'}) eq 'HASH') {
+            if ((!$domsrch{'directorysrch'}{'available'}) &&
+                ($domsrch{'directorysrch'}{'lcavailable'} eq '0')) {
+                return (&mt('LON-CAPA directory search is not available in domain: [_1]',$showdom),0);
+            }
+        }
+    }
     my %curr_selected = (
                         srchin => 'dom',
                         srchby => 'lastname',
@@ -10005,7 +10416,23 @@ sub user_picker {
                                        );
     &html_escape(\%html_lt);
     &js_escape(\%js_lt);
-    my $domform = &select_dom_form($currdom,'srchdomain',1,1);
+    my $domform;
+    my $allow_blank = 1;
+    if ($fixeddom) {
+        $allow_blank = 0;
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,[$currdom]);
+    } else {
+        my $defdom = $env{'request.role.domain'};
+        my ($trusted,$untrusted);
+        if (($context eq 'requestcrs') || ($context eq 'course')) {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('enroll',$defdom);
+        } elsif ($context eq 'author') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('othcoau',$defdom);
+        } elsif ($context eq 'domain') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('domroles',$defdom);
+        }
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,$trusted,$untrusted);
+    }
     my $srchinsel = ' <select name="srchin">';
 
     my @srchins = ('crs','dom','alc','instd');
@@ -10017,6 +10444,7 @@ sub user_picker {
         next if ($option eq 'alc');
         next if (($option eq 'crs') && ($env{'form.form'} eq 'requestcrs'));  
         next if ($option eq 'crs' && !$env{'request.course.id'});
+        next if (($option eq 'instd') && ($noinstd));
         if ($curr_selected{'srchin'} eq $option) {
             $srchinsel .= ' 
    <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
@@ -10199,7 +10627,7 @@ END_BLOCK
                &Apache::lonhtmlcommon::row_closure(1). 
                &Apache::lonhtmlcommon::end_pick_box().
                '<br />';
-    return $output;
+    return ($output,1);
 }
 
 sub user_rule_check {
@@ -10514,7 +10942,7 @@ sub get_institutional_codes {
         foreach (@currxlists) {
             if (m/^([^:]+):(\w*)$/) {
                 unless (grep/^$1$/,@{$allcourses}) {
-                    push @{$allcourses},$1;
+                    push(@{$allcourses},$1);
                     $$LC_code{$1} = $2;
                 }
             }
@@ -10527,7 +10955,7 @@ sub get_institutional_codes {
                 my $sec = $coursecode.$1;
                 my $lc_sec = $2;
                 unless (grep/^$sec$/,@{$allcourses}) {
-                    push @{$allcourses},$sec;
+                    push(@{$allcourses},$sec);
                     $$LC_code{$sec} = $lc_sec;
                 }
             }
@@ -11855,7 +12283,7 @@ sub modify_html_refs {
                 return;
             }
         } 
-        if (open(my $fh,"<$container")) {
+        if (open(my $fh,'<',$container)) {
             $content = join('', <$fh>);
             close($fh);
         } else {
@@ -11920,7 +12348,7 @@ sub modify_html_refs {
                         }
                     }
                 } else {
-                    if (open(my $fh,">$container")) {
+                    if (open(my $fh,'>',$container)) {
                         print $fh $content;
                         close($fh);
                         $output = '<p>'.&mt('Updated [quant,_1,reference] in [_2].',
@@ -12437,6 +12865,18 @@ sub decompress_uploaded_file {
 
 sub process_decompression {
     my ($docudom,$docuname,$file,$destination,$dir_root,$hiddenelem) = @_;
+    unless (($dir_root eq '/userfiles') && ($destination =~ m{^(docs|supplemental)/(default|\d+)/\d+$})) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected file path.').'</p>'."\n";
+    }
+    unless (($docudom =~ /^$match_domain$/) && ($docuname =~ /^$match_courseid$/)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected course context.').'</p>'."\n";
+    }
+    unless ($file eq &Apache::lonnet::clean_filename($file)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Filename contained unexpected characters.').'</p>'."\n";
+    }
     my ($dir,$error,$warning,$output);
     if ($file !~ /\.(zip|tar|bz2|gz|tar.gz|tar.bz2|tgz)$/i) {
         $error = &mt('Filename not a supported archive file type.').
@@ -12471,30 +12911,44 @@ sub process_decompression {
                 }
             }
             my $numskip = scalar(@to_skip);
-            if (($numskip > 0) && 
-                ($numskip == $env{'form.archive_itemcount'})) {
+            my $numoverwrite = scalar(@to_overwrite);
+            if (($numskip) && (!$numoverwrite)) { 
                 $warning = &mt('All items in the archive file already exist, and no overwriting of existing files has been requested.');         
             } elsif ($dir eq '') {
                 $error = &mt('Directory containing archive file unavailable.');
             } elsif (!$error) {
                 my ($decompressed,$display);
-                if ($numskip > 0) {
+                if (($numskip) || ($numoverwrite)) {
                     my $tempdir = time.'_'.$$.int(rand(10000));
                     mkdir("$dir/$tempdir",0755);
-                    system("mv $dir/$file $dir/$tempdir/$file");
-                    ($decompressed,$display) = 
-                        &decompress_uploaded_file($file,"$dir/$tempdir");
-                    foreach my $item (@to_skip) {
-                        if (($item ne '') && ($item !~ /\.\./)) {
-                            if (-f "$dir/$tempdir/$item") { 
-                                unlink("$dir/$tempdir/$item");
-                            } elsif (-d "$dir/$tempdir/$item") {
-                                system("rm -rf $dir/$tempdir/$item");
+                    if (&File::Copy::move("$dir/$file","$dir/$tempdir/$file")) {
+                        ($decompressed,$display) = 
+                            &decompress_uploaded_file($file,"$dir/$tempdir");
+                        foreach my $item (@to_skip) {
+                            if (($item ne '') && ($item !~ /\.\./)) {
+                                if (-f "$dir/$tempdir/$item") { 
+                                    unlink("$dir/$tempdir/$item");
+                                } elsif (-d "$dir/$tempdir/$item") {
+                                    &File::Path::remove_tree("$dir/$tempdir/$item",{ safe => 1 });
+                                }
                             }
                         }
+                        foreach my $item (@to_overwrite) {
+                            if ((-e "$dir/$tempdir/$item") && (-e "$dir/$item")) {
+                                if (($item ne '') && ($item !~ /\.\./)) {
+                                    if (-f "$dir/$item") {
+                                        unlink("$dir/$item");
+                                    } elsif (-d "$dir/$item") {
+                                        &File::Path::remove_tree("$dir/$item",{ safe => 1 });
+                                    }
+                                    &File::Copy::move("$dir/$tempdir/$item","$dir/$item");
+                                }
+                            }
+                        }
+                        if (&File::Copy::move("$dir/$tempdir/$file","$dir/$file")) {
+                            &File::Path::remove_tree("$dir/$tempdir",{ safe => 1 });
+                        }
                     }
-                    system("mv $dir/$tempdir/* $dir");
-                    rmdir("$dir/$tempdir");   
                 } else {
                     ($decompressed,$display) = 
                         &decompress_uploaded_file($file,$dir);
@@ -12512,8 +12966,7 @@ sub process_decompression {
                     if (ref($newdirlistref) eq 'ARRAY') {
                         foreach my $dir_line (@{$newdirlistref}) {
                             my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,5);
-                            unless (($item =~ /^\.+$/) || ($item eq $file) || 
-                                    ((@to_skip > 0) && (grep(/^\Q$item\E$/,@to_skip)))) {
+                            unless (($item =~ /^\.+$/) || ($item eq $file)) {
                                 push(@newitems,$item);
                                 if ($dirptr&$testdir) {
                                     $is_dir{$item} = 1;
@@ -12998,7 +13451,7 @@ END
 sub process_extracted_files {
     my ($context,$docudom,$docuname,$destination,$dir_root,$hiddenelem) = @_;
     my $numitems = $env{'form.archive_count'};
-    return unless ($numitems);
+    return if ((!$numitems) || ($numitems =~ /\D/));
     my @ids=&Apache::lonnet::current_machine_ids();
     my ($prefix,$pathtocheck,$dir,$ishome,$error,$warning,%toplevelitems,%is_dir,
         %folders,%containers,%mapinner,%prompttofetch);
@@ -13011,7 +13464,7 @@ sub process_extracted_files {
     } else {
         $prefix = $Apache::lonnet::perlvar{'lonDocRoot'};
         $pathtocheck = "$dir_root/$docudom/$docuname/$destination";
-        $dir = "$dir_root/$docudom/$docuname";    
+        $dir = "$dir_root/$docudom/$docuname";
     }
     my $currdir = "$dir_root/$destination";
     (my $docstype,$mapinner{'0'}) = ($destination =~ m{^(docs|supplemental)/(\w+)/});
@@ -13100,7 +13553,9 @@ sub process_extracted_files {
                                                         '.'.$containers{$outer},1,1);
                             $newseqid{$i} = $newidx;
                             unless ($errtext) {
-                                $result .=  '<li>'.&mt('Folder: [_1] added to course',$docstitle).'</li>'."\n";
+                                $result .=  '<li>'.&mt('Folder: [_1] added to course',
+                                                       &HTML::Entities::encode($docstitle,'<>&"')).
+                                            '</li>'."\n";
                             }
                         }
                     } else {
@@ -13109,38 +13564,47 @@ sub process_extracted_files {
                             my $url = '/uploaded/'.$docudom.'/'.$docuname.'/'.
                                       $docstype.'/'.$mapinner{$outer}.'/'.$newidx.'/'.
                                       $title;
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
-                            }
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
-                            }
-                            if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                system("mv $prefix$path $prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title");
-                                $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
-                                unless ($ishome) {
-                                    my $fetch = "$newdest{$i}/$title";
-                                    $fetch =~ s/^\Q$prefix$dir\E//;
-                                    $prompttofetch{$fetch} = 1;
+                            if (($outer !~ /\D/) && ($mapinner{$outer} !~ /\D/) && ($newidx !~ /\D/)) {
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
                                 }
-                            }
-                            $LONCAPA::map::resources[$newidx]=
-                                $docstitle.':'.$url.':false:normal:res';
-                            push(@LONCAPA::map::order, $newidx);
-                            my ($outtext,$errtext)=
-                                &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
-                                                        $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1,1);
-                            unless ($errtext) {
-                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
-                                    $result .= '<li>'.&mt('File: [_1] added to course',$docstitle).'</li>'."\n";
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
+                                }
+                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    if (rename("$prefix$path","$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title")) {
+                                        $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
+                                        unless ($ishome) {
+                                            my $fetch = "$newdest{$i}/$title";
+                                            $fetch =~ s/^\Q$prefix$dir\E//;
+                                            $prompttofetch{$fetch} = 1;
+                                        }
+                                    }
+                                }
+                                $LONCAPA::map::resources[$newidx]=
+                                    $docstitle.':'.$url.':false:normal:res';
+                                push(@LONCAPA::map::order, $newidx);
+                                my ($outtext,$errtext)=
+                                    &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
+                                                            $docuname.'/'.$folders{$outer}.
+                                                            '.'.$containers{$outer},1,1);
+                                unless ($errtext) {
+                                    if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
+                                        $result .= '<li>'.&mt('File: [_1] added to course',
+                                                              &HTML::Entities::encode($docstitle,'<>&"')).
+                                                   '</li>'."\n";
+                                    }
                                 }
+                            } else {
+                                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                                &HTML::Entities::encode($path,'<>&"')).'<br />';
                             }
                         }
                     }
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path,'<>&"')).'<br />'; 
             }
         }
         for (my $i=1; $i<=$numitems; $i++) {
@@ -13201,7 +13665,9 @@ sub process_extracted_files {
                         }
                         if ($fullpath ne '') {
                             if (-e "$prefix$path") {
-                                system("mv $prefix$path $fullpath/$title");
+                                unless (rename("$prefix$path","$fullpath/$title")) {
+                                     $warning .= &mt('Failed to rename dependency').'<br />';
+                                }
                             }
                             if (-e "$fullpath/$title") {
                                 my $showpath;
@@ -13210,21 +13676,26 @@ sub process_extracted_files {
                                 } else {
                                     $showpath = "/$title";
                                 } 
-                                $result .= '<li>'.&mt('[_1] included as a dependency',$showpath).'</li>'."\n";
-                            } 
-                            unless ($ishome) {
-                                my $fetch = "$fullpath/$title";
-                                $fetch =~ s/^\Q$prefix$dir\E//; 
-                                $prompttofetch{$fetch} = 1;
+                                $result .= '<li>'.&mt('[_1] included as a dependency',
+                                                      &HTML::Entities::encode($showpath,'<>&"')).
+                                           '</li>'."\n";
+                                unless ($ishome) {
+                                    my $fetch = "$fullpath/$title";
+                                    $fetch =~ s/^\Q$prefix$dir\E//; 
+                                    $prompttofetch{$fetch} = 1;
+                                }
                             }
                         }
                     }
                 } elsif ($env{'form.archive_'.$referrer{$i}} eq 'discard') {
                     $warning .= &mt('[_1] is a dependency of [_2], which was discarded.',
-                                    $path,$env{'form.archive_content_'.$referrer{$i}}).'<br />';
+                                    &HTML::Entities::encode($path,'<>&"'),
+                                    &HTML::Entities::encode($env{'form.archive_content_'.$referrer{$i}},'<>&"')).
+                                '<br />';
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path)).'<br />';
             }
         }
         if (keys(%todelete)) {
@@ -13498,12 +13969,15 @@ sub upfile_store {
     $env{'form.upfile'}=~s/\n+/\n/gs;
     $env{'form.upfile'}=~s/\n+$//gs;
 
-    my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
-	'_enroll_'.$env{'request.course.id'}.'_'.time.'_'.$$;
+    my $datatoken = &valid_datatoken($env{'user.name'}.'_'.$env{'user.domain'}.
+                                     '_enroll_'.$env{'request.course.id'}.'_'.
+                                     time.'_'.$$);
+    return if ($datatoken eq '');
+
     {
         my $datafile = $r->dir_config('lonDaemons').
                            '/tmp/'.$datatoken.'.tmp';
-        if ( open(my $fh,">$datafile") ) {
+        if ( open(my $fh,'>',$datafile) ) {
             print $fh $env{'form.upfile'};
             close($fh);
         }
@@ -13513,21 +13987,22 @@ sub upfile_store {
 
 =pod
 
-=item * &load_tmp_file($r)
+=item * &load_tmp_file($r,$datatoken)
 
 Load uploaded file from tmp, $r should be the HTTP Request object,
-needs $env{'form.datatoken'},
+$datatoken is the name to assign to the temporary file.
 sets $env{'form.upfile'} to the contents of the file
 
 =cut
 
 sub load_tmp_file {
-    my $r=shift;
+    my ($r,$datatoken) = @_;
+    return if ($datatoken eq '');
     my @studentdata=();
     {
         my $studentfile = $r->dir_config('lonDaemons').
-                              '/tmp/'.$env{'form.datatoken'}.'.tmp';
-        if ( open(my $fh,"<$studentfile") ) {
+                              '/tmp/'.$datatoken.'.tmp';
+        if ( open(my $fh,'<',$studentfile) ) {
             @studentdata=<$fh>;
             close($fh);
         }
@@ -13535,6 +14010,14 @@ sub load_tmp_file {
     $env{'form.upfile'}=join('',@studentdata);
 }
 
+sub valid_datatoken {
+    my ($datatoken) = @_;
+    if ($datatoken =~ /^$match_username\_$match_domain\_enroll_(|$match_domain\_$match_courseid)\_\d+_\d+$/) {
+        return $datatoken;
+    }
+    return;
+}
+
 =pod
 
 =item * &upfile_record_sep()
@@ -13975,7 +14458,7 @@ sub DrawBarGraph {
         @Labels = @$labels;
     } else {
         for (my $i=0;$i<@{$Values[0]};$i++) {
-            push (@Labels,$i+1);
+            push(@Labels,$i+1);
         }
     }
     #
@@ -14421,7 +14904,14 @@ requestsmail, updatesmail, or idconflict
 defdom (domain for which to retrieve configuration settings),
 
 origmail (scalar - email address of recipient from loncapa.conf, 
-i.e., predates configuration by DC via domainprefs.pm 
+i.e., predates configuration by DC via domainprefs.pm
+
+$requname username of requester (if mailing type is helpdeskmail)
+
+$requdom domain of requester (if mailing type is helpdeskmail)
+
+$reqemail e-mail address of requester (if mailing type is helpdeskmail)
+
 
 Returns: comma separated list of addresses to which to send e-mail.
 
@@ -14432,11 +14922,11 @@ Returns: comma separated list of address
 ############################################################
 ############################################################
 sub build_recipient_list {
-    my ($defmail,$mailing,$defdom,$origmail) = @_;
+    my ($defmail,$mailing,$defdom,$origmail,$requname,$requdom,$reqemail) = @_;
     my @recipients;
-    my $otheremails;
+    my ($otheremails,$lastresort,$allbcc,$addtext);
     my %domconfig =
-         &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
+        &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
     if (ref($domconfig{'contacts'}) eq 'HASH') {
         if (exists($domconfig{'contacts'}{$mailing})) {
             if (ref($domconfig{'contacts'}{$mailing}) eq 'HASH') {
@@ -14448,14 +14938,183 @@ sub build_recipient_list {
                             push(@recipients,$addr);
                         }
                     }
-                    $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                }
+                $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                if ($mailing eq 'helpdeskmail') {
+                    if ($domconfig{'contacts'}{$mailing}{'bcc'}) {
+                        my @bccs = split(/,/,$domconfig{'contacts'}{$mailing}{'bcc'});
+                        my @ok_bccs;
+                        foreach my $bcc (@bccs) {
+                            $bcc =~ s/^\s+//g;
+                            $bcc =~ s/\s+$//g;
+                            if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                    push(@ok_bccs,$bcc);
+                                }
+                            }
+                        }
+                        if (@ok_bccs > 0) {
+                            $allbcc = join(', ',@ok_bccs);
+                        }
+                    }
+                    $addtext = $domconfig{'contacts'}{$mailing}{'include'};
                 }
             }
         } elsif ($origmail ne '') {
-            push(@recipients,$origmail);
+            $lastresort = $origmail;
+        }
+        if ($mailing eq 'helpdeskmail') {
+            if ((ref($domconfig{'contacts'}{'overrides'}) eq 'HASH') &&
+                (keys(%{$domconfig{'contacts'}{'overrides'}}))) {
+                my ($inststatus,$inststatus_checked);
+                if (($env{'user.name'} ne '') && ($env{'user.domain'} ne '') &&
+                    ($env{'user.domain'} ne 'public')) {
+                    $inststatus_checked = 1;
+                    $inststatus = $env{'environment.inststatus'};
+                }
+                unless ($inststatus_checked) {
+                    if (($requname ne '') && ($requdom ne '')) {
+                        if (($requname =~ /^$match_username$/) &&
+                            ($requdom =~ /^$match_domain$/) &&
+                            (&Apache::lonnet::domain($requdom))) {
+                            my $requhome = &Apache::lonnet::homeserver($requname,
+                                                                      $requdom);
+                            unless ($requhome eq 'no_host') {
+                                my %userenv = &Apache::lonnet::userenvironment($requdom,$requname,'inststatus');
+                                $inststatus = $userenv{'inststatus'};
+                                $inststatus_checked = 1;
+                            }
+                        }
+                    }
+                }
+                unless ($inststatus_checked) {
+                    if ($reqemail =~ /^[^\@]+\@[^\@]+$/) {
+                        my %srch = (srchby     => 'email',
+                                    srchdomain => $defdom,
+                                    srchterm   => $reqemail,
+                                    srchtype   => 'exact');
+                        my %srch_results = &Apache::lonnet::usersearch(\%srch);
+                        foreach my $uname (keys(%srch_results)) {
+                            if (ref($srch_results{$uname}{'inststatus'}) eq 'ARRAY') {
+                                $inststatus = join(',',@{$srch_results{$uname}{'inststatus'}});
+                                $inststatus_checked = 1;
+                                last;
+                            }
+                        }
+                        unless ($inststatus_checked) {
+                            my ($dirsrchres,%srch_results) = &Apache::lonnet::inst_directory_query(\%srch);
+                            if ($dirsrchres eq 'ok') {
+                                foreach my $uname (keys(%srch_results)) {
+                                    if (ref($srch_results{$uname}{'inststatus'}) eq 'ARRAY') {
+                                        $inststatus = join(',',@{$srch_results{$uname}{'inststatus'}});
+                                        $inststatus_checked = 1;
+                                        last;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                if ($inststatus ne '') {
+                    foreach my $status (split(/\:/,$inststatus)) {
+                        if (ref($domconfig{'contacts'}{'overrides'}{$status}) eq 'HASH') {
+                            my @contacts = ('adminemail','supportemail');
+                            foreach my $item (@contacts) {
+                                if ($domconfig{'contacts'}{'overrides'}{$status}{$item}) {
+                                    my $addr = $domconfig{'contacts'}{'overrides'}{$status};
+                                    if (!grep(/^\Q$addr\E$/,@recipients)) {
+                                        push(@recipients,$addr);
+                                    }
+                                }
+                            }
+                            $otheremails = $domconfig{'contacts'}{'overrides'}{$status}{'others'};
+                            if ($domconfig{'contacts'}{'overrides'}{$status}{'bcc'}) {
+                                my @bccs = split(/,/,$domconfig{'contacts'}{'overrides'}{$status}{'bcc'});
+                                my @ok_bccs;
+                                foreach my $bcc (@bccs) {
+                                    $bcc =~ s/^\s+//g;
+                                    $bcc =~ s/\s+$//g;
+                                    if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                        if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                            push(@ok_bccs,$bcc);
+                                        }
+                                    }
+                                }
+                                if (@ok_bccs > 0) {
+                                    $allbcc = join(', ',@ok_bccs);
+                                }
+                            }
+                            $addtext = $domconfig{'contacts'}{'overrides'}{$status}{'include'};
+                            last;
+                        }
+                    }
+                }
+            }
         }
     } elsif ($origmail ne '') {
-        push(@recipients,$origmail);
+        $lastresort = $origmail;
+    }
+    if (($mailing eq 'helpdeskmail') && ($lastresort ne '')) {
+        unless (grep(/^\Q$defdom\E$/,&Apache::lonnet::current_machine_domains())) {
+            my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+            my $machinedom = $Apache::lonnet::perlvar{'lonDefDomain'};
+            my %what = (
+                          perlvar => 1,
+                       );
+            my $primary = &Apache::lonnet::domain($defdom,'primary');
+            if ($primary) {
+                my $gotaddr;
+                my ($result,$returnhash) =
+                    &Apache::lonnet::get_remote_globals($primary,{ perlvar => 1 });
+                if (($result eq 'ok') && (ref($returnhash) eq 'HASH')) {
+                    if ($returnhash->{'lonSupportEMail'} =~ /^[^\@]+\@[^\@]+$/) {
+                        $lastresort = $returnhash->{'lonSupportEMail'};
+                        $gotaddr = 1;
+                    }
+                }
+                unless ($gotaddr) {
+                    my $uintdom = &Apache::lonnet::internet_dom($primary);
+                    my $intdom = &Apache::lonnet::internet_dom($lonhost);
+                    unless ($uintdom eq $intdom) {
+                        my %domconfig =
+                            &Apache::lonnet::get_dom('configuration',['contacts'],$machinedom);
+                        if (ref($domconfig{'contacts'}) eq 'HASH') {
+                            if (ref($domconfig{'contacts'}{'otherdomsmail'}) eq 'HASH') {
+                                my @contacts = ('adminemail','supportemail');
+                                foreach my $item (@contacts) {
+                                    if ($domconfig{'contacts'}{'otherdomsmail'}{$item}) {
+                                        my $addr = $domconfig{'contacts'}{$item};
+                                        if (!grep(/^\Q$addr\E$/,@recipients)) {
+                                            push(@recipients,$addr);
+                                        }
+                                    }
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'others'}) {
+                                    $otheremails = $domconfig{'contacts'}{'otherdomsmail'}{'others'};
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'bcc'}) {
+                                    my @bccs = split(/,/,$domconfig{'contacts'}{'otherdomsmail'}{'bcc'});
+                                    my @ok_bccs;
+                                    foreach my $bcc (@bccs) {
+                                        $bcc =~ s/^\s+//g;
+                                        $bcc =~ s/\s+$//g;
+                                        if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                            if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                                push(@ok_bccs,$bcc);
+                                            }
+                                        }
+                                    }
+                                    if (@ok_bccs > 0) {
+                                        $allbcc = join(', ',@ok_bccs);
+                                    }
+                                }
+                                $addtext = $domconfig{'contacts'}{'otherdomsmail'}{'include'};
+                            }
+                        }
+                    }
+                }
+            }
+        }
     }
     if (defined($defmail)) {
         if ($defmail ne '') {
@@ -14475,8 +15134,21 @@ sub build_recipient_list {
             }
         }
     }
-    my $recipientlist = join(',',@recipients); 
-    return $recipientlist;
+    if ($mailing eq 'helpdeskmail') {
+        if ((!@recipients) && ($lastresort ne '')) {
+            push(@recipients,$lastresort);
+        }
+    } elsif ($lastresort ne '') {
+        if (!grep(/^\Q$lastresort\E$/,@recipients)) {
+            push(@recipients,$lastresort);
+        }
+    }
+    my $recipientlist = join(',',@recipients);
+    if (wantarray) {
+        return ($recipientlist,$allbcc,$addtext);
+    } else {
+        return $recipientlist;
+    }
 }
 
 ############################################################
@@ -14648,6 +15320,8 @@ jsarray (reference to array of categorie
 subcats (reference to hash of arrays containing all subcategories within each 
          category, -recursive)
 
+maxd (reference to hash used to hold max depth for all top-level categories).
+
 Returns: nothing
 
 Side effects: populates trails and allitems hash references.
@@ -14655,7 +15329,7 @@ Side effects: populates trails and allit
 =cut
 
 sub extract_categories {
-    my ($categories,$cats,$trails,$allitems,$idx,$jsarray,$subcats) = @_;
+    my ($categories,$cats,$trails,$allitems,$idx,$jsarray,$subcats,$maxd) = @_;
     if (ref($categories) eq 'HASH') {
         &gather_categories($categories,$cats,$idx,$jsarray);
         if (ref($cats->[0]) eq 'ARRAY') {
@@ -14683,12 +15357,15 @@ sub extract_categories {
                         if (ref($subcats) eq 'HASH') {
                             push(@{$subcats->{$item}},&escape($category).':'.&escape($name).':1');
                         }
-                        &recurse_categories($cats,2,$category,$trails,$allitems,\@parents,$subcats);
+                        &recurse_categories($cats,2,$category,$trails,$allitems,\@parents,$subcats,$maxd);
                     }
                 } else {
                     if (ref($subcats) eq 'HASH') {
                         $subcats->{$item} = [];
                     }
+                    if (ref($maxd) eq 'HASH') {
+                        $maxd->{$name} = 1;
+                    }
                 }
             }
         }
@@ -14726,13 +15403,13 @@ Side effects: populates trails and allit
 =cut
 
 sub recurse_categories {
-    my ($cats,$depth,$category,$trails,$allitems,$parents,$subcats) = @_;
+    my ($cats,$depth,$category,$trails,$allitems,$parents,$subcats,$maxd) = @_;
     my $shallower = $depth - 1;
     if (ref($cats->[$depth]{$category}) eq 'ARRAY') {
         for (my $k=0; $k<@{$cats->[$depth]{$category}}; $k++) {
             my $name = $cats->[$depth]{$category}[$k];
             my $item = &escape($category).':'.&escape($parents->[-1]).':'.$shallower;
-            my $trailstr = join(' -&gt; ',(@{$parents},$category));
+            my $trailstr = join(' &raquo; ',(@{$parents},$category));
             if ($allitems->{$item} eq '') {
                 push(@{$trails},$trailstr);
                 $allitems->{$item} = scalar(@{$trails})-1;
@@ -14753,16 +15430,21 @@ sub recurse_categories {
                 }
             }
             &recurse_categories($cats,$deeper,$name,$trails,$allitems,$parents,
-                                $subcats);
+                                $subcats,$maxd);
             pop(@{$parents});
         }
     } else {
         my $item = &escape($category).':'.&escape($parents->[-1]).':'.$shallower;
-        my $trailstr = join(' -&gt; ',(@{$parents},$category));
+        my $trailstr = join(' &raquo; ',(@{$parents},$category));
         if ($allitems->{$item} eq '') {
             push(@{$trails},$trailstr);
             $allitems->{$item} = scalar(@{$trails})-1;
         }
+        if (ref($maxd) eq 'HASH') {
+            if ($depth > $maxd->{$parents->[0]}) {
+                $maxd->{$parents->[0]} = $depth;
+            }
+        }
     }
     return;
 }
@@ -14783,16 +15465,19 @@ currcat - scalar with an & separated lis
 
 type    - scalar contains course type (Course or Community).
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed) 
 
 =cut
 
 sub assign_categories_table {
-    my ($cathash,$currcat,$type) = @_;
+    my ($cathash,$currcat,$type,$disabled) = @_;
     my $output;
     if (ref($cathash) eq 'HASH') {
-        my (@cats,@trails,%allitems,%idx,@jsarray,@path,$maxdepth);
-        &extract_categories($cathash,\@cats,\@trails,\%allitems,\%idx,\@jsarray);
+        my (@cats,@trails,%allitems,%idx,@jsarray,%maxd,@path,$maxdepth);
+        &extract_categories($cathash,\@cats,\@trails,\%allitems,\%idx,\@jsarray,\%maxd);
         $maxdepth = scalar(@cats);
         if (@cats > 0) {
             my $itemcount = 0;
@@ -14828,11 +15513,11 @@ sub assign_categories_table {
                     }
                     $table .= '<tr '.$css_class.'><td><span class="LC_nobreak">'.
                               '<input type="checkbox" name="usecategory" value="'.
-                              $item.'"'.$checked.' />'.$parent_title.'</span>'.
+                              $item.'"'.$checked.$disabled.' />'.$parent_title.'</span>'.
                               '<input type="hidden" name="catname" value="'.$parent.'" /></td>';
                     my $depth = 1;
                     push(@path,$parent);
-                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories);
+                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories,$disabled);
                     pop(@path);
                     $table .= '</tr><tr><td colspan="'.$maxdepth.'" class="LC_row_separator"></td></tr>';
                     $itemcount ++;
@@ -14871,12 +15556,15 @@ path - Array containing all categories b
 
 currcategories - reference to array of current categories assigned to the course
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed).
 
 =cut
 
 sub assign_category_rows {
-    my ($itemcount,$cats,$depth,$parent,$path,$currcategories) = @_;
+    my ($itemcount,$cats,$depth,$parent,$path,$currcategories,$disabled) = @_;
     my ($text,$name,$item,$chgstr);
     if (ref($cats) eq 'ARRAY') {
         my $maxdepth = scalar(@{$cats});
@@ -14899,12 +15587,12 @@ sub assign_category_rows {
                     }
                     $text .= '<tr><td><span class="LC_nobreak"><label>'.
                              '<input type="checkbox" name="usecategory" value="'.
-                             $item.'"'.$checked.' />'.$name.'</label></span>'.
+                             $item.'"'.$checked.$disabled.' />'.$name.'</label></span>'.
                              '<input type="hidden" name="catname" value="'.$name.'" />'.
                              '</td><td>';
                     if (ref($path) eq 'ARRAY') {
                         push(@{$path},$name);
-                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories);
+                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories,$disabled);
                         pop(@{$path});
                     }
                     $text .= '</td></tr>';
@@ -15131,11 +15819,11 @@ sub check_clone {
 	my %clonedesc = &Apache::lonnet::coursedescription($cloneid,{'one_time' => 1});
         if ($args->{'crstype'} eq 'Community') {
             if ($clonedesc{'type'} ne 'Community') {
-                 $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
+                $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
                 return ($can_clone, $clonemsg, $cloneid, $clonehome);
             }
         }
-	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) && 
+	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) &&
             (&Apache::lonnet::allowed('ccc',$env{'request.role.domain'}))) {
 	    $can_clone = 1;
 	} else {
@@ -15232,7 +15920,8 @@ sub check_clone {
 }
 
 sub construct_course {
-    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,$cnum,$category,$coderef) = @_;
+    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,
+        $cnum,$category,$coderef) = @_;
     my $outcome;
     my $linefeed =  '<br />'."\n";
     if ($context eq 'auto') {
@@ -15385,7 +16074,7 @@ sub construct_course {
                 my $addcheck = &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$class,$cenv{'internal.courseowner'});
                 $cenv{'internal.sectionnums'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $class;
+                    push(@badclasses,$class);
                 }
             }
             $cenv{'internal.sectionnums'} =~ s/,$//;
@@ -15413,7 +16102,7 @@ sub construct_course {
                 my $addcheck =  &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$xl,$cenv{'internal.courseowner'});
                 $cenv{'internal.crosslistings'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $xl;
+                    push(@badclasses,$xl);
                 }
             }
             $cenv{'internal.crosslistings'} =~ s/,$//;
@@ -15448,27 +16137,28 @@ sub construct_course {
     }
     if (@badclasses > 0) {
         my %lt=&Apache::lonlocal::texthash(
-                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.  However, if automated course roster updates are enabled for this class, these particular sections/crosslistings will not contribute towards enrollment, because the user identified as the course owner for this LON-CAPA course',
-                'dnhr' => 'does not have rights to access enrollment in these classes',
-                'adby' => 'as determined by the policies of your institution on access to official classlists'
+                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.',
+                'howi' => 'However, if automated course roster updates are enabled for this class, these particular sections/crosslistings are not guaranteed to contribute towards enrollment.',
+                'itis' => 'It is possible that rights to access enrollment for these classes will be available through assignment of co-owners.',
         );
-        my $badclass_msg = $cenv{'internal.courseowner'}.') - '.$lt{'dnhr'}.
-                           ' ('.$lt{'adby'}.')';
+        my $badclass_msg = $lt{'tclb'}.$linefeed.$lt{'howi'}.$linefeed.
+                           &mt('That is because the user identified as the course owner ([_1]) does not have rights to access enrollment in these classes, as determined by the policies of your institution on access to official classlists',$cenv{'internal.courseowner'}).$linefeed.$lt{'itis'};
         if ($context eq 'auto') {
             $outcome .= $badclass_msg.$linefeed;
+        } else {
             $outcome .= '<div class="LC_warning">'.$badclass_msg.$linefeed.'<ul>'."\n";
-            foreach my $item (@badclasses) {
-                if ($context eq 'auto') {
-                    $outcome .= " - $item\n";
-                } else {
-                    $outcome .= "<li>$item</li>\n";
-                }
-            }
+        }
+        foreach my $item (@badclasses) {
             if ($context eq 'auto') {
-                $outcome .= $linefeed;
+                $outcome .= " - $item\n";
             } else {
-                $outcome .= "</ul><br /><br /></div>\n";
+                $outcome .= "<li>$item</li>\n";
             }
+        }
+        if ($context eq 'auto') {
+            $outcome .= $linefeed;
+        } else {
+            $outcome .= "</ul><br /><br /></div>\n";
         } 
     }
     if ($args->{'no_end_date'}) {
@@ -15501,6 +16191,9 @@ sub construct_course {
        if ($args->{'setcontent'}) {
            $cenv{'question.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
        }
+       if ($args->{'setcomment'}) {
+           $cenv{'comment.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
+       }
     }
     if ($args->{'reshome'}) {
 	$cenv{'reshome'}=$args->{'reshome'}.'/';
@@ -15715,13 +16408,14 @@ sub group_term {
 }
 
 sub course_types {
-    my @types = ('official','unofficial','community','textbook','placement');
+    my @types = ('official','unofficial','community','textbook','placement','lti');
     my %typename = (
                          official   => 'Official course',
                          unofficial => 'Unofficial course',
                          community  => 'Community',
                          textbook   => 'Textbook course',
                          placement  => 'Placement test',
+                         lti        => 'LTI provider',
                    );
     return (\@types,\%typename);
 }
@@ -15801,6 +16495,24 @@ sub compare_arrays {
     return @difference;
 }
 
+sub lon_status_items {
+    my %defaults = (
+                     E         => 100,
+                     W         => 4,
+                     N         => 1,
+                     U         => 5,
+                     threshold => 200,
+                     sysmail   => 2500,
+                   );
+    my %names = (
+                   E => 'Errors',
+                   W => 'Warnings',
+                   N => 'Notices',
+                   U => 'Unsent',
+                );
+    return (\%defaults,\%names);
+}
+
 # -------------------------------------------------------- Initialize user login
 sub init_user_environment {
     my ($r, $username, $domain, $authhost, $form, $args) = @_;
@@ -15808,8 +16520,6 @@ sub init_user_environment {
 
     my $public=($username eq 'public' && $domain eq 'public');
 
-# See if old ID present, if so, remove
-
     my ($filename,$cookie,$userroles,$firstaccenv,$timerintenv);
     my $now=time;
 
@@ -15831,12 +16541,29 @@ sub init_user_environment {
 	}
 	if (!$cookie) { $cookie="publicuser_$oldest"; }
     } else {
-	# if this isn't a robot, kill any existing non-robot sessions
+	# See if old ID present, if so, remove if this isn't a robot,
+	# killing any existing non-robot sessions
 	if (!$args->{'robot'}) {
 	    opendir(DIR,$lonids);
 	    while ($filename=readdir(DIR)) {
 		if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
-		    unlink($lonids.'/'.$filename);
+                    if (tie(my %oldenv,'GDBM_File',"$lonids/$filename",
+                            &GDBM_READER(),0640)) {
+                        my $linkedfile;
+                        if (exists($oldenv{'user.linkedenv'})) {
+                            $linkedfile = $oldenv{'user.linkedenv'};
+                        }
+                        untie(%oldenv);
+                        if (unlink("$lonids/$filename")) {
+                            if ($linkedfile =~ /^[a-f0-9]+_linked$/) {
+                                if (-l "$lonids/$linkedfile.id") {
+                                    unlink("$lonids/$linkedfile.id");
+                                }
+                            }
+                        }
+                    } else {
+                        unlink($lonids.'/'.$filename);
+                    }
 		}
 	    }
 	    closedir(DIR);
@@ -15871,8 +16598,7 @@ sub init_user_environment {
 
     my %userenv = &Apache::lonnet::dump('environment',$domain,$username);
     my ($tmp) = keys(%userenv);
-    if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-    } else {
+    if ($tmp =~ /^(con_lost|error|no_such_host)/i) {
 	undef(%userenv);
     }
     if (($userenv{'interface'}) && (!$form->{'interface'})) {
@@ -15924,39 +16650,75 @@ sub init_user_environment {
             $env{'user.noloadbalance'} = $lonhost;
         }
 
-        my %is_adv = ( is_adv => $env{'user.adv'} );
-        my %domdef;
-        unless ($domain eq 'public') {
-            %domdef = &Apache::lonnet::get_domain_defaults($domain);
+        if ($form->{'noloadbalance'}) {
+            my @hosts = &Apache::lonnet::current_machine_ids();
+            my $hosthere = $form->{'noloadbalance'};
+            if (grep(/^\Q$hosthere\E$/,@hosts)) {
+                $initial_env{"user.noloadbalance"} = $hosthere;
+                $env{'user.noloadbalance'} = $hosthere;
+            }
         }
 
-        foreach my $tool ('aboutme','blog','webdav','portfolio') {
-            $userenv{'availabletools.'.$tool} = 
-                &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
-                                                  undef,\%userenv,\%domdef,\%is_adv);
-        }
+        unless ($domain eq 'public') {
+            my %is_adv = ( is_adv => $env{'user.adv'} );
+            my %domdef = &Apache::lonnet::get_domain_defaults($domain);
 
-        foreach my $crstype ('official','unofficial','community','textbook','placement') {
-            $userenv{'canrequest.'.$crstype} =
-                &Apache::lonnet::usertools_access($username,$domain,$crstype,
-                                                  'reload','requestcourses',
-                                                  \%userenv,\%domdef,\%is_adv);
-        }
+            foreach my $tool ('aboutme','blog','webdav','portfolio') {
+                $userenv{'availabletools.'.$tool} = 
+                    &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
+                                                      undef,\%userenv,\%domdef,\%is_adv);
+            }
 
-        $userenv{'canrequest.author'} =
-            &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
-                                        'reload','requestauthor',
-                                        \%userenv,\%domdef,\%is_adv);
-        my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
-                                             $domain,$username);
-        my $reqstatus = $reqauthor{'author_status'};
-        if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
-            if (ref($reqauthor{'author'}) eq 'HASH') {
-                $userenv{'requestauthorqueued'} = $reqstatus.':'.
-                                                  $reqauthor{'author'}{'timestamp'};
+            foreach my $crstype ('official','unofficial','community','textbook','placement','lti') {
+                $userenv{'canrequest.'.$crstype} =
+                    &Apache::lonnet::usertools_access($username,$domain,$crstype,
+                                                      'reload','requestcourses',
+                                                      \%userenv,\%domdef,\%is_adv);
             }
-        }
 
+            $userenv{'canrequest.author'} =
+                &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
+                                                  'reload','requestauthor',
+                                                  \%userenv,\%domdef,\%is_adv);
+            my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
+                                                 $domain,$username);
+            my $reqstatus = $reqauthor{'author_status'};
+            if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
+                if (ref($reqauthor{'author'}) eq 'HASH') {
+                    $userenv{'requestauthorqueued'} = $reqstatus.':'.
+                                                      $reqauthor{'author'}{'timestamp'};
+                }
+            }
+            my ($types,$typename) = &course_types();
+            if (ref($types) eq 'ARRAY') {
+                my @options = ('approval','validate','autolimit');
+                my $optregex = join('|',@options);
+                my (%willtrust,%trustchecked);
+                foreach my $type (@{$types}) {
+                    my $dom_str = $env{'environment.reqcrsotherdom.'.$type};
+                    if ($dom_str ne '') {
+                        my $updatedstr = '';
+                        my @possdomains = split(',',$dom_str);
+                        foreach my $entry (@possdomains) {
+                            my ($extdom,$extopt) = split(':',$entry);
+                            unless ($trustchecked{$extdom}) {
+                                $willtrust{$extdom} = &Apache::lonnet::will_trust('reqcrs',$domain,$extdom);
+                                $trustchecked{$extdom} = 1;
+                            }
+                            if ($willtrust{$extdom}) {
+                                $updatedstr .= $entry.',';
+                            }
+                        }
+                        $updatedstr =~ s/,$//;
+                        if ($updatedstr) {
+                            $userenv{'reqcrsotherdom.'.$type} = $updatedstr;
+                        } else {
+                            delete($userenv{'reqcrsotherdom.'.$type});
+                        }
+                    }
+                }
+            }
+        }
 	$env{'user.environment'} = "$lonids/$cookie.id";
 
 	if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id",
@@ -16573,7 +17335,7 @@ sub search_courses {
                 if (ref($courses{$cid}) eq 'HASH') {
                     if (ref($courses{$cid}{roles}) eq 'ARRAY') {
                         if (!grep(/^\Q$courserole\E$/,@{$courses{$cid}{roles}})) {
-                            push (@{$courses{$cid}{roles}},$courserole);
+                            push(@{$courses{$cid}{roles}},$courserole);
                         }
                     } else {
                         $courses{$cid}{roles} = [$courserole];
@@ -16769,8 +17531,12 @@ sub needs_coursereinit {
         $interval = 600;
     }
     if (($now-$env{'request.course.timechecked'})>$interval) {
-        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
+        my $blocked = &blocking_status('reinit',$cnum,$cdom,undef,1);
+        if ($blocked) {
+            return ();
+        }
+        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         if ($lastchange > $env{'request.course.tied'}) {
             my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
             if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
@@ -16793,22 +17559,34 @@ sub needs_coursereinit {
 }
 
 sub update_content_constraints {
-    my ($cdom,$cnum,$chome,$cid) = @_;
+    my ($cdom,$cnum,$chome,$cid,$keeporder) = @_;
     my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
     my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'});
-    my %checkresponsetypes;
+    my (%checkresponsetypes,%checkcrsrestypes);
     foreach my $key (keys(%Apache::lonnet::needsrelease)) {
         my ($item,$name,$value) = split(/:/,$key);
         if ($item eq 'resourcetag') {
             if ($name eq 'responsetype') {
                 $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
             }
+        } elsif ($item eq 'course') {
+            if ($name eq 'courserestype') {
+                $checkcrsrestypes{$value} = $Apache::lonnet::needsrelease{$key};
+            }
         }
     }
     my $navmap = Apache::lonnavmaps::navmap->new();
     if (defined($navmap)) {
-        my %allresponses;
-        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) {
+        my (%allresponses,%allcrsrestypes);
+        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) {
+            if ($res->is_tool()) {
+                if ($allcrsrestypes{'exttool'}) {
+                    $allcrsrestypes{'exttool'} ++;
+                } else {
+                    $allcrsrestypes{'exttool'} = 1;
+                }
+                next;
+            }
             my %responses = $res->responseTypes();
             foreach my $key (keys(%responses)) {
                 next unless(exists($checkresponsetypes{$key}));
@@ -16821,8 +17599,38 @@ sub update_content_constraints {
                 ($reqdmajor,$reqdminor) = ($major,$minor);
             }
         }
+        foreach my $key (keys(%allcrsrestypes)) {
+            my ($major,$minor) = split(/\./,$checkcrsrestypes{$key});
+            if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+                ($reqdmajor,$reqdminor) = ($major,$minor);
+            }
+        }
         undef($navmap);
     }
+    my (@resources,@order,@resparms,@zombies);
+    if ($keeporder) {
+        use LONCAPA::map;
+        @resources = @LONCAPA::map::resources;
+        @order = @LONCAPA::map::order;
+        @resparms = @LONCAPA::map::resparms;
+        @zombies = @LONCAPA::map::zombies;
+    }
+    my $suppmap = 'supplemental.sequence';
+    my ($suppcount,$supptools,$errors) = (0,0,0);
+    ($suppcount,$supptools,$errors) = &recurse_supplemental($cnum,$cdom,$suppmap,
+                                                            $suppcount,$supptools,$errors);
+    if ($keeporder) {
+        @LONCAPA::map::resources = @resources;
+        @LONCAPA::map::order = @order;
+        @LONCAPA::map::resparms = @resparms;
+        @LONCAPA::map::zombies = @zombies;
+    }
+    if ($supptools) {
+        my ($major,$minor) = split(/\./,$checkcrsrestypes{'exttool'});
+        if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+            ($reqdmajor,$reqdminor) = ($major,$minor);
+        }
+    }
     unless (($reqdmajor eq '') && ($reqdminor eq '')) {
         &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
     }
@@ -16843,7 +17651,7 @@ sub allmaps_incourse {
     if ($lastchange > $env{'request.course.tied'}) {
         my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum");
         unless ($ferr) {
-            &update_content_constraints($cdom,$cnum,$chome,$cid);
+            &update_content_constraints($cdom,$cnum,$chome,$cid,1);
         }
     }
     my $navmap = Apache::lonnavmaps::navmap->new();
@@ -16879,7 +17687,7 @@ sub parse_supplemental_title {
 }
 
 sub recurse_supplemental {
-    my ($cnum,$cdom,$suppmap,$numfiles,$errors) = @_;
+    my ($cnum,$cdom,$suppmap,$numfiles,$numexttools,$errors) = @_;
     if ($suppmap) {
         my ($errtext,$fatal) = &LONCAPA::map::mapread('/uploaded/'.$cdom.'/'.$cnum.'/'.$suppmap);
         if ($fatal) {
@@ -16890,8 +17698,12 @@ sub recurse_supplemental {
                     my ($title,$src,$ext,$type,$status)=split(/\:/,$res);
                     if (($src ne '') && ($status eq 'res')) {
                         if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) {
-                            ($numfiles,$errors) = &recurse_supplemental($cnum,$cdom,$1,$numfiles,$errors);
+                            ($numfiles,$numexttools,$errors) = &recurse_supplemental($cnum,$cdom,$1,
+                                                                   $numfiles,$numexttools,$errors);
                         } else {
+                            if ($src =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
+                                $numexttools ++;
+                            }
                             $numfiles ++;
                         }
                     }
@@ -16899,12 +17711,12 @@ sub recurse_supplemental {
             }
         }
     }
-    return ($numfiles,$errors);
+    return ($numfiles,$numexttools,$errors);
 }
 
 sub symb_to_docspath {
-    my ($symb) = @_;
-    return unless ($symb);
+    my ($symb,$navmapref) = @_;
+    return unless ($symb && ref($navmapref));
     my ($mapurl,$id,$resurl) = &Apache::lonnet::decode_symb($symb);
     if ($resurl=~/\.(sequence|page)$/) {
         $mapurl=$resurl;
@@ -16912,9 +17724,11 @@ sub symb_to_docspath {
         $mapurl=$env{'course.'.$env{'request.course.id'}.'.url'};
     }
     my $mapresobj;
-    my $navmap = Apache::lonnavmaps::navmap->new();
-    if (ref($navmap)) {
-        $mapresobj = $navmap->getResourceByUrl($mapurl);
+    unless (ref($$navmapref)) {
+        $$navmapref = Apache::lonnavmaps::navmap->new();
+    }
+    if (ref($$navmapref)) {
+        $mapresobj = $$navmapref->getResourceByUrl($mapurl);
     }
     $mapurl=~s{^.*/([^/]+)\.(\w+)$}{$1};
     my $type=$2;
@@ -16924,7 +17738,7 @@ sub symb_to_docspath {
         if ($pcslist ne '') {
             foreach my $pc (split(/,/,$pcslist)) {
                 next if ($pc <= 1);
-                my $res = $navmap->getByMapPc($pc);
+                my $res = $$navmapref->getByMapPc($pc);
                 if (ref($res)) {
                     my $thisurl = $res->src();
                     $thisurl=~s{^.*/([^/]+)\.\w+$}{$1};
@@ -16971,10 +17785,10 @@ sub symb_to_docspath {
 }
 
 sub captcha_display {
-    my ($context,$lonhost) = @_;
+    my ($context,$lonhost,$defdom) = @_;
     my ($output,$error);
     my ($captcha,$pubkey,$privkey,$version) = 
-        &get_captcha_config($context,$lonhost);
+        &get_captcha_config($context,$lonhost,$defdom);
     if ($captcha eq 'original') {
         $output = &create_captcha();
         unless ($output) {
@@ -16990,9 +17804,9 @@ sub captcha_display {
 }
 
 sub captcha_response {
-    my ($context,$lonhost) = @_;
+    my ($context,$lonhost,$defdom) = @_;
     my ($captcha_chk,$captcha_error);
-    my ($captcha,$pubkey,$privkey,$version) = &get_captcha_config($context,$lonhost);
+    my ($captcha,$pubkey,$privkey,$version) = &get_captcha_config($context,$lonhost,$defdom);
     if ($captcha eq 'original') {
         ($captcha_chk,$captcha_error) = &check_captcha();
     } elsif ($captcha eq 'recaptcha') {
@@ -17004,7 +17818,7 @@ sub captcha_response {
 }
 
 sub get_captcha_config {
-    my ($context,$lonhost) = @_;
+    my ($context,$lonhost,$dom_in_effect) = @_;
     my ($captcha,$pubkey,$privkey,$version,$hashtocheck);
     my $hostname = &Apache::lonnet::hostname($lonhost);
     my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
@@ -17052,7 +17866,28 @@ sub get_captcha_config {
         } elsif ($domconfhash{$serverhomedom.'.login.captcha'} eq 'original') {
             $captcha = 'original';
         }
-    }
+    } elsif ($context eq 'passwords') {
+        if ($dom_in_effect) {
+            my %passwdconf = &Apache::lonnet::get_passwdconf($dom_in_effect);
+            if ($passwdconf{'captcha'} eq 'recaptcha') {
+                if (ref($passwdconf{'recaptchakeys'}) eq 'HASH') {
+                    $pubkey = $passwdconf{'recaptchakeys'}{'public'};
+                    $privkey = $passwdconf{'recaptchakeys'}{'private'};
+                }
+                if ($privkey && $pubkey) {
+                    $captcha = 'recaptcha';
+                    $version = $passwdconf{'recaptchaversion'};
+                    if ($version ne '2') {
+                        $version = 1;
+                    }
+                } else {
+                    $captcha = 'original';
+                }
+            } elsif ($passwdconf{'captcha'} ne 'notused') {
+                $captcha = 'original';
+            }
+        }
+    } 
     return ($captcha,$pubkey,$privkey,$version);
 }
 
@@ -17076,6 +17911,9 @@ sub create_captcha {
             last;
         }
     }
+    if ($output eq '') {
+        &Apache::lonnet::logthis("Failed to create Captcha code after $tries attempts.");
+    }
     return $output;
 }
 
@@ -17133,14 +17971,19 @@ sub check_recaptcha {
     my ($privkey,$version) = @_;
     my $captcha_chk;
     if ($version >= 2) {
-        my $ua = LWP::UserAgent->new;
-        $ua->timeout(10);
         my %info = (
                      secret   => $privkey, 
                      response => $env{'form.g-recaptcha-response'},
                      remoteip => $ENV{'REMOTE_ADDR'},
                    );
-        my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info);
+        my $request=new HTTP::Request('POST','https://www.google.com/recaptcha/api/siteverify');
+        $request->content(join('&',map {
+                         my $name = escape($_);
+                         "$name=" . ( ref($info{$_}) eq 'ARRAY'
+                         ? join("&$name=", map {escape($_) } @{$info{$_}})
+                         : &escape($info{$_}) );
+        } keys(%info)));
+        my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',10,1);
         if ($response->is_success)  {
             my $data = JSON::DWIW->from_json($response->decoded_content);
             if (ref($data) eq 'HASH') {
@@ -17203,9 +18046,25 @@ sub cleanup_html {
 
 # Checks for critical messages and returns a redirect url if one exists.
 # $interval indicates how often to check for messages.
+# $context is the calling context -- roles, grades, contents, menu or flip. 
 sub critical_redirect {
-    my ($interval) = @_;
+    my ($interval,$context) = @_;
     if ((time-$env{'user.criticalcheck.time'})>$interval) {
+        if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            my $blocked = &blocking_status('alert',$cnum,$cdom,undef,1);
+            if ($blocked) {
+                my $checkrole = "cm./$cdom/$cnum";
+                if ($env{'request.course.sec'} ne '') {
+                    $checkrole .= "/$env{'request.course.sec'}";
+                }
+                unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+                        ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
+                    return;
+                }
+            }
+        }
         my @what=&Apache::lonnet::dump('critical', $env{'user.domain'}, 
                                         $env{'user.name'});
         &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});
@@ -17271,6 +18130,293 @@ sub des_decrypt {
     return $plaintext;
 }
 
+sub make_short_symbs {
+    my ($cdom,$cnum,$navmap) = @_;
+    return unless (ref($navmap));
+    my ($numnew,@errors);
+    my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny');
+    if (@toshorten) {
+        my (%maps,%resources,%titles);
+        &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles,
+                                                               'shorturls',$cdom,$cnum);
+        my %tocreate;
+        if (keys(%resources)) {
+            foreach my $item (sort {$a <=> $b} (@toshorten)) {
+                my $symb = $resources{$item};
+                if ($symb) {
+                    $tocreate{$cnum.'&'.$symb} = 1;
+                }
+            }
+        }
+        if (keys(%tocreate)) {
+            my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum);
+            my $su = Short::URL->new(no_vowels => 1);
+            my $init = '';
+            my (%newunique,%addcourse,%courseonly,%failed);
+            # get lock on tiny db
+            my $now = time;
+            my $lockhash = {
+                                "lock\0$now" => $env{'user.name'}.
+                                                ':'.$env{'user.domain'},
+                            };
+            my $tries = 0;
+            my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
+            my ($code,$error);
+            while (($gotlock ne 'ok') && ($tries<3)) {
+                $tries ++;
+                sleep 1;
+                $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
+            }
+            if ($gotlock eq 'ok') {
+                $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique,
+                                       \%addcourse,\%courseonly,\%failed);
+                if (keys(%failed)) {
+                    my $numfailed = scalar(keys(%failed));
+                    push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed));
+                }
+                if (keys(%newunique)) {
+                    my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom);
+                    if ($putres eq 'ok') {
+                        $numnew = scalar(keys(%newunique));
+                        my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum);
+                        unless ($newputres eq 'ok') {
+                            push(@errors,&mt('error: could not store course look-up of short URLs'));
+                        }
+                    } else {
+                        push(@errors,&mt('error: could not store unique six character URLs'));
+                    }
+                }
+                my $dellockres = &Apache::lonnet::del_dom('tiny',["lock\0$now"],$cdom);
+                unless ($dellockres eq 'ok') {
+                    push(@errors,&mt('error: could not release lockfile'));
+                }
+            } else {
+                push(@errors,&mt('error: could not obtain lockfile'));
+            }
+            if (keys(%courseonly)) {
+                my $result = &Apache::lonnet::newput('tiny',\%courseonly,$cdom,$cnum);
+                if ($result ne 'ok') {
+                    push(@errors,&mt('error: could not update course look-up of short URLs'));
+                }
+            }
+        }
+    }
+    return ($numnew,\@errors);
+}
+
+sub shorten_symbs {
+    my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_;
+    return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') &&
+                   (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') &&
+                   (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH'));
+    my (%possibles,%collisions);
+    foreach my $key (keys(%{$tocreate})) {
+        my $num = String::CRC32::crc32($key);
+        my $tiny = $su->encode($num,$init);
+        if ($tiny) {
+            $possibles{$tiny} = $key;
+        }
+    }
+    if (!$init) {
+        $init = 1;
+    } else {
+        $init ++;
+    }
+    if (keys(%possibles)) {
+        my @posstiny = keys(%possibles);
+        my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
+        my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname);
+        if (keys(%currtiny)) {
+            foreach my $key (keys(%currtiny)) {
+                next if ($currtiny{$key} eq '');
+                if ($currtiny{$key} eq $possibles{$key}) {
+                    my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key});
+                    unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+                        $courseonly->{$tsymb} = $key;
+                    }
+                } else {
+                    $collisions{$possibles{$key}} = 1;
+                }
+                delete($possibles{$key});
+            }
+        }
+        foreach my $key (keys(%possibles)) {
+            $newunique->{$key} = $possibles{$key};
+            my ($tcnum,$tsymb) = split(/\&/,$possibles{$key});
+            unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+                $addcourse->{$tsymb} = $key;
+            }
+        }
+    }
+    if (keys(%collisions)) {
+        if ($init <5) {
+            if (!$init) {
+                $init = 1;
+            } else {
+                $init ++;
+            }
+            $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions,
+                                   $newunique,$addcourse,$courseonly,$failed);
+        } else {
+            foreach my $key (keys(%collisions)) {
+                $failed->{$key} = 1;
+            }
+        }
+    }
+    return $init;
+}
+
+sub is_nonframeable {
+    my ($url,$absolute,$hostname,$ip,$nocache) = @_;
+    my ($remprotocol,$remhost) = ($url =~ m{^(https?)\://(([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,})}i);
+    return if (($remprotocol eq '') || ($remhost eq ''));
+
+    $remprotocol = lc($remprotocol);
+    $remhost = lc($remhost);
+    my $remport = 80;
+    if ($remprotocol eq 'https') {
+        $remport = 443;
+    }
+    my ($result,$cached) = &Apache::lonnet::is_cached_new('noiframe',$remhost.':'.$remport);
+    if ($cached) {
+        unless ($nocache) {
+            if ($result) {
+                return 1;
+            } else {
+                return 0;
+            }
+        }
+    }
+    my $uselink;
+    my $request = new HTTP::Request('HEAD',$url);
+    my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',5);
+    if ($response->is_success()) {
+        my $secpolicy = lc($response->header('content-security-policy'));
+        my $xframeop = lc($response->header('x-frame-options'));
+        $secpolicy =~ s/^\s+|\s+$//g;
+        $xframeop =~ s/^\s+|\s+$//g;
+        if (($secpolicy ne '') || ($xframeop ne '')) {
+            my $remotehost = $remprotocol.'://'.$remhost;
+            my ($origin,$protocol,$port);
+            if ($ENV{'SERVER_PORT'} =~/^\d+$/) {
+                $port = $ENV{'SERVER_PORT'};
+            } else {
+                $port = 80;
+            }
+            if ($absolute eq '') {
+                $protocol = 'http:';
+                if ($port == 443) {
+                    $protocol = 'https:';
+                }
+                $origin = $protocol.'//'.lc($hostname);
+            } else {
+                $origin = lc($absolute);
+                ($protocol,$hostname) = ($absolute =~ m{^(https?:)//([^/]+)$});
+            }
+            if (($secpolicy) && ($secpolicy =~ /\Qframe-ancestors\E([^;]*)(;|$)/)) {
+                my $framepolicy = $1;
+                $framepolicy =~ s/^\s+|\s+$//g;
+                my @policies = split(/\s+/,$framepolicy);
+                if (@policies) {
+                    if (grep(/^\Q'none'\E$/,@policies)) {
+                        $uselink = 1;
+                    } else {
+                        $uselink = 1;
+                        if ((grep(/^\Q*\E$/,@policies)) || (grep(/^\Q$protocol\E$/,@policies)) ||
+                                (($origin ne '') && (grep(/^\Q$origin\E$/,@policies))) ||
+                                (($ip ne '') && (grep(/^\Q$ip\E$/,@policies)))) {
+                            undef($uselink);
+                        }
+                        if ($uselink) {
+                            if (grep(/^\Q'self'\E$/,@policies)) {
+                                if (($origin ne '') && ($remotehost eq $origin)) {
+                                    undef($uselink);
+                                }
+                            }
+                        }
+                        if ($uselink) {
+                            my @possok;
+                            if ($ip ne '') {
+                                push(@possok,$ip);
+                            }
+                            my $hoststr = '';
+                            foreach my $part (reverse(split(/\./,$hostname))) {
+                                if ($hoststr eq '') {
+                                    $hoststr = $part;
+                                } else {
+                                    $hoststr = "$part.$hoststr";
+                                }
+                                if ($hoststr eq $hostname) {
+                                    push(@possok,$hostname);
+                                } else {
+                                    push(@possok,"*.$hoststr");
+                                }
+                            }
+                            if (@possok) {
+                                foreach my $poss (@possok) {
+                                    last if (!$uselink);
+                                    foreach my $policy (@policies) {
+                                        if ($policy =~ m{^(\Q$protocol\E//|)\Q$poss\E(\Q:$port\E|)$}) {
+                                            undef($uselink);
+                                            last;
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            } elsif ($xframeop ne '') {
+                $uselink = 1;
+                my @policies = split(/\s*,\s*/,$xframeop);
+                if (@policies) {
+                    unless (grep(/^deny$/,@policies)) {
+                        if ($origin ne '') {
+                            if (grep(/^sameorigin$/,@policies)) {
+                                if ($remotehost eq $origin) {
+                                    undef($uselink);
+                                }
+                            }
+                            if ($uselink) {
+                                foreach my $policy (@policies) {
+                                    if ($policy =~ /^allow-from\s*(.+)$/) {
+                                        my $allowfrom = $1;
+                                        if (($allowfrom ne '') && ($allowfrom eq $origin)) {
+                                            undef($uselink);
+                                            last;
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    if ($nocache) {
+        if ($cached) {
+            my $devalidate;
+            if ($uselink && !$result) {
+                $devalidate = 1;
+            } elsif (!$uselink && $result) {
+                $devalidate = 1;
+            }
+            if ($devalidate) {
+                &Apache::lonnet::devalidate_cache_new('noiframe',$remhost.':'.$remport);
+            }
+        }
+    } else {
+        if ($uselink) {
+            $result = 1;
+        } else {
+            $result = 0;
+        }
+        &Apache::lonnet::do_cache_new('noiframe',$remhost.':'.$remport,$result,3600);
+    }
+    return $uselink;
+}
+
 1;
 __END__;