loncom/lonnet/perl/lonnet.pm - diff

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Diff for /loncom/lonnet/perl/lonnet.pm between versions 1.674 and 1.757

-version 1.674, 2005/11/01 15:07:29
+version 1.757, 2006/06/22 15:34:16
  Line 38  use vars
  qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
     %libserv %pr %prp $memcache %packagetab
     %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
-    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
+    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
     %domaindescription %domain_auth_def %domain_auth_arg_def
-    %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit
+    %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
-    %env);
+    $tmpdir $_64bit %env);
  use IO::Socket;
  use GDBM_File;
- use Apache::Constants qw(:common :http);
  use HTML::LCParser;
  use HTML::Parser;
  use Fcntl qw(:flock);
- use Apache::lonlocal;
  use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
  use Time::HiRes qw( gettimeofday tv_interval );
  use Cache::Memcached;
+ use Digest::MD5;
+ use lib '/home/httpd/lib/perl';
+ use LONCAPA;
+ use LONCAPA::Configuration;
  my $readit;
  my $max_connection_retries = 10;     # Or some such value.
- Line 85  delayed.
+ Line 88  delayed.
  # --------------------------------------------------------------------- Logging
+ {
+     my $logid;
+     sub instructor_log {
+ 	my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
+ 	$logid++;
+ 	my $id=time().'00000'.$$.'00000'.$logid;
+ 	return &Apache::lonnet::put('nohist_'.$hash_name,
+ 				    { $id => {
+ 					'exe_uname' => $env{'user.name'},
+ 					'exe_udom'  => $env{'user.domain'},
+ 					'exe_time'  => time(),
+ 					'exe_ip'    => $ENV{'REMOTE_ADDR'},
+ 					'delflag'   => $delflag,
+ 					'logentry'  => $storehash,
+ 					'uname'     => $uname,
+ 					'udom'      => $udom,
+ 				    }
+ 				  },
+ 				    $env{'course.'.$env{'request.course.id'}.'.domain'},
+ 				    $env{'course.'.$env{'request.course.id'}.'.num'}
+ 				    );
+     }
+ }
  sub logtouch {
      my $execdir=$perlvar{'lonDaemons'};
- Line 123  sub logperm {
+ Line 149  sub logperm {
  # -------------------------------------------------- Non-critical communication
  sub subreply {
      my ($cmd,$server)=@_;
-     my $peerfile="$perlvar{'lonSockDir'}/$server";
+     my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
      #
      #  With loncnew process trimming, there's a timing hole between lonc server
      #  process exit and the master server picking up the listen on the AF_UNIX
- Line 151  sub subreply {
+ Line 177  sub subreply {
      }
      my $answer;
      if ($client) {
- 	print $client "$cmd\n";
+ 	print $client "sethost:$server:$cmd\n";
  	$answer=<$client>;
  	if (!$answer) { $answer="con_lost"; }
  	chomp($answer);
- Line 255  sub critical {
+ Line 281  sub critical {
      return $answer;
  }
+ # ------------------------------------------- check if return value is an error
+ sub error {
+     my ($result) = @_;
+     if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
+ 	if ($2 == 2) { return undef; }
+ 	return $1;
+     }
+     return undef;
+ }
  # ------------------------------------------- Transfer profile into environment
  sub transfer_profile_to_env {
      my ($lonidsdir,$handle)=@_;
+     if (!defined($lonidsdir)) {
+ 	$lonidsdir = $perlvar{'lonIDsDir'};
+     }
+     if (!defined($handle)) {
+         ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
+     }
      my @profile;
      {
  	open(my $idf,"$lonidsdir/$handle.id");
- Line 270  sub transfer_profile_to_env {
+ Line 314  sub transfer_profile_to_env {
      my %Remove;
      for ($envi=0;$envi<=$#profile;$envi++) {
  	chomp($profile[$envi]);
- 	my ($envname,$envvalue)=split(/=/,$profile[$envi]);
+ 	my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
+ 	$envname=&unescape($envname);
+ 	$envvalue=&unescape($envvalue);
  	$env{$envname} = $envvalue;
          if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
              if ($time < time-300) {
- Line 288  sub transfer_profile_to_env {
+ Line 334  sub transfer_profile_to_env {
  sub appenv {
      my %newenv=@_;
-     foreach (keys %newenv) {
+     foreach my $key (keys(%newenv)) {
- 	if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
+ 	if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
              &logthis("<font color=\"blue\">WARNING: ".
-                 "Attempt to modify environment ".$_." to ".$newenv{$_}
+                 "Attempt to modify environment ".$key." to ".$newenv{$key}
                  .'</font>');
- 	    delete($newenv{$_});
+ 	    delete($newenv{$key});
          } else {
-             $env{$_}=$newenv{$_};
+             $env{$key}=$newenv{$key};
          }
      }
- Line 322  sub appenv {
+ Line 368  sub appenv {
      for (my $i=0; $i<=$#oldenv; $i++) {
          chomp($oldenv[$i]);
          if ($oldenv[$i] ne '') {
- 	    my ($name,$value)=split(/=/,$oldenv[$i]);
+ 	    my ($name,$value)=split(/=/,$oldenv[$i],2);
+ 	    $name=&unescape($name);
+ 	    $value=&unescape($value);
  	    unless (defined($newenv{$name})) {
  		$newenv{$name}=$value;
  	    }
- Line 335  sub appenv {
+ Line 383  sub appenv {
  	}
  	my $newname;
  	foreach $newname (keys %newenv) {
- 	    print $fh "$newname=$newenv{$newname}\n";
+ 	    print $fh &escape($newname).'='.&escape($newenv{$newname})."\n";
  	}
  	close($fh);
      }
- Line 347  sub appenv {
+ Line 395  sub appenv {
  sub delenv {
      my $delthis=shift;
-     my %newenv=();
      if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
          &logthis("<font color=\"blue\">WARNING: ".
                  "Attempt to delete from environment ".$delthis);
- Line 379  sub delenv {
+ Line 426  sub delenv {
  	    close($fh);
  	    return 'error: '.$!;
  	}
- 	foreach (@oldenv) {
+ 	foreach my $cur_key (@oldenv) {
- 	    if ($_=~/^$delthis/) {
+ 	    my $unescaped_cur_key = &unescape($cur_key);
-                 my ($key,undef) = split('=',$_);
+ 	    if ($unescaped_cur_key=~/^$delthis/) {
+                 my ($key) = split('=',$cur_key,2);
+ 		$key = &unescape($key);
                  delete($env{$key});
              } else {
-                 print $fh $_;
+                 print $fh $cur_key;
              }
  	}
  	close($fh);
- Line 839  sub getsection {
+ Line 888  sub getsection {
  }
  sub save_cache {
-     my ($r)=@_;
-     if (! $r->is_initial_req()) { return DECLINED; }
      &purge_remembered();
+     #&Apache::loncommon::validate_page();
      undef(%env);
-     return OK;
  }
  my $to_remember=-1;
- Line 946  sub userenvironment {
+ Line 993  sub userenvironment {
  sub studentphoto {
      my ($udom,$unam,$ext) = @_;
      my $home=&Apache::lonnet::homeserver($unam,$udom);
-     my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
+     if (defined($env{'request.course.id'})) {
-     my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
+         if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
-     if ($ret ne 'ok') {
+             if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
- 	return '/adm/lonKaputt/lonlogo_broken.gif';
+                 return(&retrievestudentphoto($udom,$unam,$ext));
+             } else {
+                 my ($result,$perm_reqd)=
+ 		    &Apache::lonnet::auto_photo_permission($unam,$udom);
+                 if ($result eq 'ok') {
+                     if (!($perm_reqd eq 'yes')) {
+                         return(&retrievestudentphoto($udom,$unam,$ext));
+                     }
+                 }
+             }
+         }
+     } else {
+         my ($result,$perm_reqd) =
+ 	    &Apache::lonnet::auto_photo_permission($unam,$udom);
+         if ($result eq 'ok') {
+             if (!($perm_reqd eq 'yes')) {
+                 return(&retrievestudentphoto($udom,$unam,$ext));
+             }
+         }
+     }
+     return '/adm/lonKaputt/lonlogo_broken.gif';
+ }
+ sub retrievestudentphoto {
+     my ($udom,$unam,$ext,$type) = @_;
+     my $home=&Apache::lonnet::homeserver($unam,$udom);
+     my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
+     if ($ret eq 'ok') {
+         my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
+         if ($type eq 'thumbnail') {
+             $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
+         }
+         my $tokenurl=&Apache::lonnet::tokenwrapper($url);
+         return $tokenurl;
+     } else {
+         if ($type eq 'thumbnail') {
+             return '/adm/lonKaputt/genericstudent_tn.gif';
+         } else {
+             return '/adm/lonKaputt/lonlogo_broken.gif';
+         }
      }
-     my $tokenurl=&Apache::lonnet::tokenwrapper($url);
-     return $tokenurl;
  }
  # -------------------------------------------------------------------- New chat
  sub chatsend {
-     my ($newentry,$anon)=@_;
+     my ($newentry,$anon,$group)=@_;
      my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
      my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
      my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
      &reply('chatsend:'.$cdom.':'.$cnum.':'.
  	   &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
- 		   &escape($newentry)),$chome);
+ 		   &escape($newentry)).':'.$group,$chome);
  }
  # ------------------------------------------ Find current version of a resource
- Line 1107  sub ssi {
+ Line 1191  sub ssi {
      my $ua=new LWP::UserAgent;
      my $request;
+     $form{'no_update_last_known'}=1;
      if (%form) {
        $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
        $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
- Line 1279  sub clean_filename {
+ Line 1365  sub clean_filename {
  }
  # --------------- Take an uploaded file and put it into the userfiles directory
- # input: name of form element, coursedoc=1 means this is for the course
+ # input: $formname - the contents of the file are in $env{"form.$formname"}
- # output: url of file in userspace
+ #                    the desired filenam is in $env{"form.$formname.filename"}
+ #        $coursedoc - if true up to the current course
+ #                     if false
+ #        $subdir - directory in userfile to store the file into
+ #        $parser, $allfiles, $codebase - unknown
+ #
+ # output: url of file in userspace, or error: <message>
+ #             or /adm/notfound.html if failure to upload occurse
  sub userfileupload {
-     my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase)=@_;
+     my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
      if (!defined($subdir)) { $subdir='unknown'; }
      my $fname=$env{'form.'.$formname.'.filename'};
      $fname=&clean_filename($fname);
- Line 1305  sub userfileupload {
+ Line 1398  sub userfileupload {
          open(my $fh,'>'.$fullpath.'/'.$fname);
          print $fh $env{'form.'.$formname};
          close($fh);
          return $fullpath.'/'.$fname;
+     } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
+         my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
+                        '_'.$env{'user.domain'}.'/pending';
+         my @parts=split(/\//,$filepath);
+         my $fullpath = $perlvar{'lonDaemons'};
+         for (my $i=0;$i<@parts;$i++) {
+             $fullpath .= '/'.$parts[$i];
+             if ((-e $fullpath)!=1) {
+                 mkdir($fullpath,0777);
+             }
+         }
+         open(my $fh,'>'.$fullpath.'/'.$fname);
+         print $fh $env{'form.'.$formname};
+         close($fh);
+         return $fullpath.'/'.$fname;
      }
  # Create the directory if not present
      $fname="$subdir/$fname";
      if ($coursedoc) {
- Line 1322  sub userfileupload {
+ Line 1431  sub userfileupload {
  				       $fname,$formname,$parser,
  				       $allfiles,$codebase);
          }
+     } elsif (defined($destuname)) {
+         my $docuname=$destuname;
+         my $docudom=$destudom;
+ 	return &finishuserfileupload($docuname,$docudom,$formname,
+ 				     $fname,$parser,$allfiles,$codebase);
      } else {
          my $docuname=$env{'user.name'};
          my $docudom=$env{'user.domain'};
+         if (exists($env{'form.group'})) {
+             $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
+             $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
+         }
  	return &finishuserfileupload($docuname,$docudom,$formname,
  				     $fname,$parser,$allfiles,$codebase);
      }
- Line 1350  sub finishuserfileupload {
+ Line 1469  sub finishuserfileupload {
      }
  # Save the file
      {
- 	open(FH,'>'.$filepath.'/'.$file);
+ 	if (!open(FH,'>'.$filepath.'/'.$file)) {
- 	print FH $env{'form.'.$formname};
+ 	    &logthis('Failed to create '.$filepath.'/'.$file);
+ 	    print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
+ 	    return '/adm/notfound.html';
+ 	}
+ 	if (!print FH ($env{'form.'.$formname})) {
+ 	    &logthis('Failed to write to '.$filepath.'/'.$file);
+ 	    print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
+ 	    return '/adm/notfound.html';
+ 	}
  	close(FH);
      }
      if ($parser eq 'parse') {
- Line 1550  sub flushcourselogs {
+ Line 1677  sub flushcourselogs {
          if ($courseidbuffer{$coursehombuf{$crsid}}) {
             $courseidbuffer{$coursehombuf{$crsid}}.='&'.
  			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
-                          ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
+                          ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
          } else {
             $courseidbuffer{$coursehombuf{$crsid}}=
  			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
-                          ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
+                          ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
          }
      }
  #
- Line 1657  sub courselog {
+ Line 1784  sub courselog {
         $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
      $courseownerbuf{$env{'request.course.id'}}=
         $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
+     $coursetypebuf{$env{'request.course.id'}}=
+        $env{'course.'.$env{'request.course.id'}.'.type'};
      if (defined $courselogs{$env{'request.course.id'}}) {
  	$courselogs{$env{'request.course.id'}}.='&'.$what;
      } else {
- Line 1827  sub courseidput {
+ Line 1956  sub courseidput {
  }
  sub courseiddump {
-     my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
+     my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter)=@_;
      my %returnhash=();
      unless ($domfilter) { $domfilter=''; }
      foreach my $tryserver (keys %libserv) {
- Line 1836  sub courseiddump {
+ Line 1965  sub courseiddump {
  	        foreach (
                   split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
  			       $sincefilter.':'.&escape($descfilter).':'.
-                                &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
+                                &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter),
                                 $tryserver))) {
  		    my ($key,$value)=split(/\=/,$_);
                      if (($key) && ($value)) {
- Line 1852  sub courseiddump {
+ Line 1981  sub courseiddump {
  # ---------------------------------------------------------- DC e-mail
  sub dcmailput {
-     my ($domain,$msgid,$contents,$server)=@_;
+     my ($domain,$msgid,$message,$server)=@_;
      my $status = &Apache::lonnet::critical(
-        'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
+        'dcmailput:'.$domain.':'.&escape($msgid).'='.
-        &Apache::lonnet::escape($$contents{$server}),$server);
+        &escape($message),$server);
      return $status;
  }
  sub dcmaildump {
      my ($dom,$startdate,$enddate,$senders) = @_;
      my %returnhash=();
-     foreach my $tryserver (keys(%libserv)) {
+     if (exists($domain_primary{$dom})) {
-         if ($hostdom{$tryserver} eq $dom) {
+         my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
-             %{$returnhash{$tryserver}}=();
+                                                          &escape($enddate).':';
- 	    my $cmd='dcmaildump:'.$dom.':'.
+ 	my @esc_senders=map { &escape($_)} @$senders;
- 		&escape($startdate).':'.&escape($enddate).':';
+ 	$cmd.=&escape(join('&',@esc_senders));
- 	    my @esc_senders=map { &escape($_)} @$senders;
+ 	foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
- 	    $cmd.=&escape(join('&',@esc_senders));
+             my ($key,$value) = split(/\=/,$_);
- 	    foreach (split(/\&/,&reply($cmd,$tryserver))) {
+             if (($key) && ($value)) {
-                 my ($key,$value) = split(/\=/,$_);
+                 $returnhash{&unescape($key)} = &unescape($value);
-                 if (($key) && ($value)) {
-                     $returnhash{$tryserver}{&unescape($key)} = &unescape($value);
-                 }
              }
          }
      }
- Line 2505  sub restore {
+ Line 2631  sub restore {
  # ---------------------------------------------------------- Course Description
  sub coursedescription {
-     my $courseid=shift;
+     my ($courseid,$args)=@_;
      $courseid=~s/^\///;
      $courseid=~s/\_/\//g;
      my ($cdomain,$cnum)=split(/\//,$courseid);
- Line 2515  sub coursedescription {
+ Line 2641  sub coursedescription {
      # trying and trying and trying to get the course description.
      my %envhash=();
      my %returnhash=();
-     $envhash{'course.'.$normalid.'.last_cache'}=time;
+     my $expiretime=600;
+     if ($env{'request.course.id'} eq $normalid) {
+ 	$expiretime=120;
+     }
+     my $prefix='course.'.$cdomain.'_'.$cnum.'.';
+     if (!$args->{'freshen_cache'}
+ 	&& ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
+ 	foreach my $key (keys(%env)) {
+ 	    next if ($key !~ /^\Q$prefix\E(.*)/);
+ 	    my ($setting) = $1;
+ 	    $returnhash{$setting} = $env{$key};
+ 	}
+ 	return %returnhash;
+     }
+     # get the data agin
+     if (!$args->{'one_time'}) {
+ 	$envhash{'course.'.$normalid.'.last_cache'}=time;
+     }
      if ($chome ne 'no_host') {
         %returnhash=&dump('environment',$cdomain,$cnum);
         if (!exists($returnhash{'con_lost'})) {
             $returnhash{'home'}= $chome;
  	   $returnhash{'domain'} = $cdomain;
  	   $returnhash{'num'} = $cnum;
+            if (!defined($returnhash{'type'})) {
+                $returnhash{'type'} = 'Course';
+            }
             while (my ($name,$value) = each %returnhash) {
                 $envhash{'course.'.$normalid.'.'.$name}=$value;
             }
- Line 2533  sub coursedescription {
+ Line 2682  sub coursedescription {
             $envhash{'course.'.$normalid.'.num'}=$cnum;
         }
      }
-     &appenv(%envhash);
+     if (!$args->{'one_time'}) {
+ 	&appenv(%envhash);
+     }
      return %returnhash;
  }
- Line 2574  sub rolesinit {
+ Line 2725  sub rolesinit {
      my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
      if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
      my %allroles=();
+     my %allgroups=();
      my $now=time;
-     my $userroles="user.login.time=$now\n";
+     my %userroles = ('user.login.time' => $now);
+     my $group_privs;
      if ($rolesdump ne '') {
          foreach (split(/&/,$rolesdump)) {
  	  if ($_!~/^rolesdef_/) {
              my ($area,$role)=split(/=/,$_);
  	    $area=~s/\_\w\w$//;
-             my ($trole,$tend,$tstart);
+             my ($trole,$tend,$tstart,$group_privs);
  	    if ($role=~/^cr/) {
  		if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
  		    ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
- Line 2590  sub rolesinit {
+ Line 2743  sub rolesinit {
  		} else {
  		    $trole=$role;
  		}
+             } elsif ($role =~ m|^gr/|) {
+                 ($trole,$tend,$tstart) = split(/_/,$role);
+                 ($trole,$group_privs) = split(/\//,$trole);
+                 $group_privs = &unescape($group_privs);
  	    } else {
  		($trole,$tend,$tstart)=split(/_/,$role);
  	    }
-             $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
+ 	    my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
+ 					 $username);
+ 	    @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
              if (($tend!=0) && ($tend<$now)) { $trole=''; }
              if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
              if (($area ne '') && ($trole ne '')) {
- Line 2601  sub rolesinit {
+ Line 2760  sub rolesinit {
  		my ($tdummy,$tdomain,$trest)=split(/\//,$area);
  		if ($trole =~ /^cr\//) {
                      &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
+                 } elsif ($trole eq 'gr') {
+                     &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
  		} else {
                      &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
  		}
              }
            }
          }
-         my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
+         my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
-         $userroles.='user.adv='.$adv."\n".
+         $userroles{'user.adv'}    = $adv;
- 	            'user.author='.$author."\n";
+ 	$userroles{'user.author'} = $author;
          $env{'user.adv'}=$adv;
      }
-     return $userroles;
+     return \%userroles;
  }
  sub set_arearole {
      my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
  # log the associated role with the area
      &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
-     return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
+     return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
  }
  sub custom_roleprivs {
- Line 2649  sub custom_roleprivs {
+ Line 2810  sub custom_roleprivs {
      }
  }
+ sub group_roleprivs {
+     my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
+     my $access = 1;
+     my $now = time;
+     if (($tend!=0) && ($tend<$now)) { $access = 0; }
+     if (($tstart!=0) && ($tstart>$now)) { $access=0; }
+     if ($access) {
+         my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
+         $$allgroups{$course}{$group} .=':'.$group_privs;
+     }
+ }
  sub standard_roleprivs {
      my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
- Line 2669  sub standard_roleprivs {
+ Line 2841  sub standard_roleprivs {
  }
  sub set_userprivs {
-     my ($userroles,$allroles) = @_;
+     my ($userroles,$allroles,$allgroups) = @_;
      my $author=0;
      my $adv=0;
+     my %grouproles = ();
+     if (keys(%{$allgroups}) > 0) {
+         foreach my $role (keys %{$allroles}) {
+             my ($trole,$area,$sec,$extendedarea);
+             if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
+                 $trole = $1;
+                 $area = $2;
+                 $sec = $3;
+                 $extendedarea = $area.$sec;
+                 if (exists($$allgroups{$area})) {
+                     foreach my $group (keys(%{$$allgroups{$area}})) {
+                         my $spec = $trole.'.'.$extendedarea;
+                         $grouproles{$spec.'.'.$area.'/'.$group} =
+                                                 $$allgroups{$area}{$group};
+                     }
+                 }
+             }
+         }
+     }
+     foreach (keys(%grouproles)) {
+         $$allroles{$_} = $grouproles{$_};
+     }
      foreach (keys %{$allroles}) {
          my %thesepriv=();
          if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
- Line 2688  sub set_userprivs {
+ Line 2882  sub set_userprivs {
          }
          my $thesestr='';
          foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
-         $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
+         $userroles->{'user.priv.'.$_} = $thesestr;
      }
      return ($author,$adv);
  }
- Line 2739  sub del {
+ Line 2933  sub del {
  # -------------------------------------------------------------- dump interface
  sub dump {
-    my ($namespace,$udomain,$uname,$regexp)=@_;
+     my ($namespace,$udomain,$uname,$regexp,$range)=@_;
-    if (!$udomain) { $udomain=$env{'user.domain'}; }
+     if (!$udomain) { $udomain=$env{'user.domain'}; }
-    if (!$uname) { $uname=$env{'user.name'}; }
+     if (!$uname) { $uname=$env{'user.name'}; }
-    my $uhome=&homeserver($uname,$udomain);
+     my $uhome=&homeserver($uname,$udomain);
-    if ($regexp) {
+     if ($regexp) {
-        $regexp=&escape($regexp);
+ 	$regexp=&escape($regexp);
-    } else {
+     } else {
-        $regexp='.';
+ 	$regexp='.';
-    }
+     }
-    my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
+     my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
-    my @pairs=split(/\&/,$rep);
+     my @pairs=split(/\&/,$rep);
-    my %returnhash=();
+     my %returnhash=();
-    foreach (@pairs) {
+     foreach my $item (@pairs) {
-       my ($key,$value)=split(/=/,$_);
+ 	my ($key,$value)=split(/=/,$item,2);
-       $returnhash{unescape($key)}=&thaw_unescape($value);
+ 	$key = &unescape($key);
-    }
+ 	next if ($key =~ /^error: 2 /);
-    return %returnhash;
+ 	$returnhash{$key}=&thaw_unescape($value);
+     }
+     return %returnhash;
+ }
+ # --------------------------------------------------------- dumpstore interface
+ sub dumpstore {
+    my ($namespace,$udomain,$uname,$regexp,$range)=@_;
+    return &dump($namespace,$udomain,$uname,$regexp,$range);
  }
  # -------------------------------------------------------------- keys interface
- Line 2899  sub newput {
+ Line 3102  sub newput {
  # ---------------------------------------------------------  putstore interface
  sub putstore {
-    my ($namespace,$storehash,$udomain,$uname)=@_;
+    my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
     if (!$udomain) { $udomain=$env{'user.domain'}; }
     if (!$uname) { $uname=$env{'user.name'}; }
     my $uhome=&homeserver($uname,$udomain);
     my $items='';
-    my %allitems = ();
+    foreach my $key (keys(%$storehash)) {
-    foreach (keys %$storehash) {
+        $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
-        if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
-            my $key = $1.':keys:'.$2;
-            $allitems{$key} .= $3.':';
-        }
-        $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
-    }
-    foreach (keys %allitems) {
-        $allitems{$_} =~ s/\:$//;
-        $items.= $_.'='.$allitems{$_}.'&';
     }
     $items=~s/\&$//;
-    return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
+    my $esc_symb=&escape($symb);
+    my $esc_v=&escape($version);
+    my $reply =
+        &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
+ 	      $uhome);
+    if ($reply eq 'unknown_cmd') {
+        # gfall back to way things use to be done
+        return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
+ 			    $uname);
+    }
+    return $reply;
+ }
+ sub old_putstore {
+     my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
+     if (!$udomain) { $udomain=$env{'user.domain'}; }
+     if (!$uname) { $uname=$env{'user.name'}; }
+     my $uhome=&homeserver($uname,$udomain);
+     my %newstorehash;
+     foreach (keys %$storehash) {
+ 	my $key = $version.':'.&escape($symb).':'.$_;
+ 	$newstorehash{$key} = $storehash->{$_};
+     }
+     my $items='';
+     my %allitems = ();
+     foreach (keys %newstorehash) {
+ 	if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
+ 	    my $key = $1.':keys:'.$2;
+ 	    $allitems{$key} .= $3.':';
+ 	}
+ 	$items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
+     }
+     foreach (keys %allitems) {
+ 	$allitems{$_} =~ s/\:$//;
+ 	$items.= $_.'='.$allitems{$_}.'&';
+     }
+     $items=~s/\&$//;
+     return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
  }
  # ------------------------------------------------------ critical put interface
- Line 2929  sub cput {
+ Line 3160  sub cput {
     my $uhome=&homeserver($uname,$udomain);
     my $items='';
     foreach (keys %$storehash) {
-        $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
+        $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
     }
     $items=~s/\&$//;
     return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
- Line 2971  sub tmpput {
+ Line 3202  sub tmpput {
  # ------------------------------------------------------------ tmpget interface
  sub tmpget {
-     my ($token)=@_;
+     my ($token,$server)=@_;
-     my $rep=&reply("tmpget:$token",$perlvar{'lonHostID'});
+     if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
+     my $rep=&reply("tmpget:$token",$server);
      my %returnhash;
      foreach my $item (split(/\&/,$rep)) {
  	my ($key,$value)=split(/=/,$item);
- Line 2981  sub tmpget {
+ Line 3213  sub tmpget {
      return %returnhash;
  }
+ # ------------------------------------------------------------ tmpget interface
+ sub tmpdel {
+     my ($token,$server)=@_;
+     if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
+     return &reply("tmpdel:$token",$server);
+ }
  # ---------------------------------------------- Custom access rule evaluation
  sub customaccess {
- Line 3019  sub customaccess {
+ Line 3258  sub customaccess {
  sub allowed {
      my ($priv,$uri,$symb)=@_;
+     my $ver_orguri=$uri;
      $uri=&deversion($uri);
      my $orguri=$uri;
      $uri=&declutter($uri);
      if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
  # Free bre access to adm and meta resources
      if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
- Line 3033  sub allowed {
+ Line 3271  sub allowed {
      }
  # Free bre access to user's own portfolio contents
-     my ($space,$domain,$name,$dir)=split('/',$uri);
+     my ($space,$domain,$name,@dir)=split('/',$uri);
      if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
- 	($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
+ 	($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
          return 'F';
      }
+ # bre access to group if user has rgf priv for this group and course.
+     if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
+          && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
+         if (exists($env{'request.course.id'})) {
+             my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+             my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+             if (($domain eq $cdom) && ($name eq $cnum)) {
+                 my $courseprivid=$env{'request.course.id'};
+                 $courseprivid=~s/\_/\//;
+                 if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
+                     .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
+                     return $1;
+                 }
+             }
+         }
+     }
  # Free bre to public access
      if ($priv eq 'bre') {
- Line 3071  sub allowed {
+ Line 3326  sub allowed {
      if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
          # uri is the requested domain in this case.
          # comparison to 'request.role.domain' shows if the user has selected
          # a role of dc for the domain in question.
          return 'F' if ($uri eq $env{'request.role.domain'});
      }
- Line 3102  sub allowed {
+ Line 3357  sub allowed {
         $thisallowed.=$1;
      }
+ # Group: uri itself is a group
+     my $groupuri=$uri;
+     $groupuri=~s/^([^\/])/\/$1/;
+     if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
+        =~/\Q$priv\E\&([^\:]*)/) {
+        $thisallowed.=$1;
+     }
  # URI is an uploaded document for this course, default permissions don't matter
  # not allowing 'edit' access (editupload) to uploaded course docs
      if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
- Line 3113  sub allowed {
+ Line 3376  sub allowed {
                  $thisallowed.=$1;
              }
          } else {
-             my $refuri=$env{'httpref.'.$orguri};
+             my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
              if ($refuri) {
                  if ($refuri =~ m|^/adm/|) {
                      $thisallowed='F';
- Line 3245  sub allowed {
+ Line 3508  sub allowed {
  	       my ($cdom,$cnum,$csec)=split(/\//,$courseid);
                 my $prefix='course.'.$cdom.'_'.$cnum.'.';
                 if ((time-$env{$prefix.'last_cache'})>$expiretime) {
- 		   &coursedescription($courseid);
+ 		   &coursedescription($courseid,{'freshen_cache' => 1});
                 }
                 if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
                  || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
- Line 3293  sub allowed {
+ Line 3556  sub allowed {
         my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
         if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
  	   =~/\Q$rolecode\E/) {
-            &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
+ 	   if ($priv ne 'pch') {
-                 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
+ 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
-                 $env{'request.course.id'});
+ 			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
+ 			$env{'request.course.id'});
+ 	   }
             return '';
         }
         if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
  	   =~/\Q$unamedom\E/) {
-            &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
+ 	   if ($priv ne 'pch') {
-                 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
+ 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
-                 $env{'request.course.id'});
+ 			'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
+ 			$env{'request.course.id'});
+ 	   }
             return '';
         }
     }
- Line 3313  sub allowed {
+ Line 3580  sub allowed {
     if ($thisallowed=~/R/) {
         my $rolecode=(split(/\./,$env{'request.role'}))[0];
         if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
- 	   &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
+ 	   if ($priv ne 'pch') {
- 		'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
+ 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
-           return '';
+ 			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
+ 	   }
+ 	   return '';
         }
     }
- Line 3338  sub allowed {
+ Line 3607  sub allowed {
     return 'F';
  }
+ sub split_uri_for_cond {
+     my $uri=&deversion(&declutter(shift));
+     my @uriparts=split(/\//,$uri);
+     my $filename=pop(@uriparts);
+     my $pathname=join('/',@uriparts);
+     return ($pathname,$filename);
+ }
  # --------------------------------------------------- Is a resource on the map?
  sub is_on_map {
-     my $uri=&deversion(&declutter(shift));
+     my ($pathname,$filename) = &split_uri_for_cond(shift);
-     my @uriparts=split(/\//,$uri);
-     my $filename=$uriparts[$#uriparts];
-     my $pathname=$uri;
-     $pathname=~s|/\Q$filename\E$||;
-     $pathname=~s/^adm\/wrapper\///;
      #Trying to find the conditional for the file
      my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
  	       /\&\Q$filename\E\:([\d\|]+)\&/);
- Line 3619  sub auto_create_password {
+ Line 3890  sub auto_create_password {
      return ($authparam,$create_passwd,$authchk);
  }
+ sub auto_photo_permission {
+     my ($cnum,$cdom,$students) = @_;
+     my $homeserver = &homeserver($cnum,$cdom);
+     my ($outcome,$perm_reqd,$conditions) =
+ 	split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
+     if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+ 	return (undef,undef);
+     }
+     return ($outcome,$perm_reqd,$conditions);
+ }
+ sub auto_checkphotos {
+     my ($uname,$udom,$pid) = @_;
+     my $homeserver = &homeserver($uname,$udom);
+     my ($result,$resulttype);
+     my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
+ 				   &escape($uname).':'.&escape($pid),
+ 				   $homeserver));
+     if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+ 	return (undef,undef);
+     }
+     if ($outcome) {
+         ($result,$resulttype) = split(/:/,$outcome);
+     }
+     return ($result,$resulttype);
+ }
+ sub auto_photochoice {
+     my ($cnum,$cdom) = @_;
+     my $homeserver = &homeserver($cnum,$cdom);
+     my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
+ 						       &escape($cdom),
+ 						       $homeserver)));
+     if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+ 	return (undef,undef);
+     }
+     return ($update,$comment);
+ }
+ sub auto_photoupdate {
+     my ($affiliatesref,$dom,$cnum,$photo) = @_;
+     my $homeserver = &homeserver($cnum,$dom);
+     my $host=$hostname{$homeserver};
+     my $cmd = '';
+     my $maxtries = 1;
+     foreach (keys %{$affiliatesref}) {
+         $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
+     }
+     $cmd =~ s/%%$//;
+     $cmd = &escape($cmd);
+     my $query = 'institutionalphotos';
+     my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
+     unless ($queryid=~/^\Q$host\E\_/) {
+         &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
+         return 'error: '.$queryid;
+     }
+     my $reply = &get_query_reply($queryid);
+     my $tries = 1;
+     while (($reply=~/^timeout/) && ($tries < $maxtries)) {
+         $reply = &get_query_reply($queryid);
+         $tries ++;
+     }
+     if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
+         &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
+     } else {
+         my @responses = split(/:/,$reply);
+         my $outcome = shift(@responses);
+         foreach my $item (@responses) {
+             my ($key,$value) = split(/=/,$item);
+             $$photo{$key} = $value;
+         }
+         return $outcome;
+     }
+     return 'error';
+ }
  sub auto_instcode_format {
      my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
      my $courses = '';
- Line 3652  sub auto_instcode_format {
+ Line 3999  sub auto_instcode_format {
      return $response;
  }
+ # ------------------------------------------------------- Course Group routines
+ sub get_coursegroups {
+     my ($cdom,$cnum,$group) = @_;
+     return(&dump('coursegroups',$cdom,$cnum,$group));
+ }
+ sub modify_coursegroup {
+     my ($cdom,$cnum,$groupsettings) = @_;
+     return(&put('coursegroups',$groupsettings,$cdom,$cnum));
+ }
+ sub modify_group_roles {
+     my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
+     my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
+     my $role = 'gr/'.&escape($userprivs);
+     my ($uname,$udom) = split(/:/,$user);
+     my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
+     if ($result eq 'ok') {
+         &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
+     }
+     return $result;
+ }
+ sub modify_coursegroup_membership {
+     my ($cdom,$cnum,$membership) = @_;
+     my $result = &put('groupmembership',$membership,$cdom,$cnum);
+     return $result;
+ }
+ sub get_active_groups {
+     my ($udom,$uname,$cdom,$cnum) = @_;
+     my $now = time;
+     my %groups = ();
+     foreach my $key (keys(%env)) {
+         if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
+             my ($start,$end) = split(/\./,$env{$key});
+             if (($end!=0) && ($end<$now)) { next; }
+             if (($start!=0) && ($start>$now)) { next; }
+             if ($1 eq $cdom && $2 eq $cnum) {
+                 $groups{$3} = $env{$key} ;
+             }
+         }
+     }
+     return %groups;
+ }
+ sub get_group_membership {
+     my ($cdom,$cnum,$group) = @_;
+     return(&dump('groupmembership',$cdom,$cnum,$group));
+ }
+ sub get_users_groups {
+     my ($udom,$uname,$courseid) = @_;
+     my @usersgroups;
+     my $cachetime=1800;
+     $courseid=~s/\_/\//g;
+     $courseid=~s/^(\w)/\/$1/;
+     my $hashid="$udom:$uname:$courseid";
+     my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
+     if (defined($cached)) {
+         @usersgroups = split(/:/,$grouplist);
+     } else {
+         $grouplist = '';
+         my %roleshash = &dump('roles',$udom,$uname,$courseid);
+         my ($tmp) = keys(%roleshash);
+         if ($tmp=~/^error:/) {
+             &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
+         } else {
+             my $access_end = $env{'course.'.$courseid.
+                                   '.default_enrollment_end_date'};
+             my $now = time;
+             foreach my $key (keys(%roleshash)) {
+                 if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
+                     my $group = $1;
+                     if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
+                         my $start = $2;
+                         my $end = $1;
+                         if ($start == -1) { next; } # deleted from group
+                         if (($start!=0) && ($start>$now)) { next; }
+                         if (($end!=0) && ($end<$now)) {
+                             if ($access_end && $access_end < $now) {
+                                 if ($access_end - $end < 86400) {
+                                     push(@usersgroups,$group);
+                                 }
+                             }
+                             next;
+                         }
+                         push(@usersgroups,$group);
+                     }
+                 }
+             }
+             @usersgroups = &sort_course_groups($courseid,@usersgroups);
+             $grouplist = join(':',@usersgroups);
+             &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
+         }
+     }
+     return @usersgroups;
+ }
+ sub devalidate_getgroups_cache {
+     my ($udom,$uname,$cdom,$cnum)=@_;
+     my $courseid = $cdom.'_'.$cnum;
+     $courseid=~s/\_/\//g;
+     $courseid=~s/^(\w)/\/$1/;
+     my $hashid="$udom:$uname:$courseid";
+     &devalidate_cache_new('getgroups',$hashid);
+ }
  # ------------------------------------------------------------------ Plain Text
  sub plaintext {
-     my $short=shift;
+     my ($short,$type,$cid) = @_;
-     return &mt($prp{$short});
+     if (!defined($cid)) {
+         $cid = $env{'request.course.id'};
+     }
+     if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
+         return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
+                                           '.plaintext'});
+     }
+     my %rolenames = (
+                       Course => 'std',
+                       Group => 'alt1',
+                     );
+     if (defined($type) &&
+          defined($rolenames{$type}) &&
+          defined($prp{$short}{$rolenames{$type}})) {
+         return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
+     } else {
+         return &Apache::lonlocal::mt($prp{$short}{'std'});
+     }
  }
  # ----------------------------------------------------------------- Assign Role
- Line 3674  sub assignrole {
+ Line 4148  sub assignrole {
             return 'refused';
          }
          $mrole='cr';
+     } elsif ($role =~ /^gr\//) {
+         my $cwogrp=$url;
+         $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
+         unless (&allowed('mdg',$cwogrp)) {
+             &logthis('Refused group assignrole: '.
+               $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
+                     $env{'user.name'}.' at '.$env{'user.domain'});
+             return 'refused';
+         }
+         $mrole='gr';
      } else {
          my $cwosec=$url;
          $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
- Line 3695  sub assignrole {
+ Line 4179  sub assignrole {
             $command.='_0_'.$start;
          }
      }
+     my $origstart = $start;
+     my $origend = $end;
  # actually delete
      if ($deleteflag) {
  	if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
- Line 3712  sub assignrole {
+ Line 4198  sub assignrole {
  # log new user role if status is ok
      if ($answer eq 'ok') {
  	&userrolelog($role,$uname,$udom,$url,$start,$end);
+ # for course roles, perform group memberships changes triggered by role change.
+         unless ($role =~ /^gr/) {
+             &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
+                                              $origstart);
+         }
      }
      return $answer;
  }
- Line 3834  sub modifyuser {
+ Line 4325  sub modifyuser {
      }
      my $reply = &put('environment', \%names, $udom,$uname);
      if ($reply ne 'ok') { return 'error: '.$reply; }
+     &devalidate_cache_new('namescache',$uname.':'.$udom);
      &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
               $umode.', '.$first.', '.$middle.', '.
  	     $last.', '.$gene.' by '.
- Line 3967  sub writecoursepref {
+ Line 4459  sub writecoursepref {
  # ---------------------------------------------------------- Make/modify course
  sub createcourse {
-     my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
+     my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
+         $course_owner,$crstype)=@_;
      $url=&declutter($url);
      my $cid='';
      unless (&allowed('ccc',$udom)) {
- Line 4004  sub createcourse {
+ Line 4497  sub createcourse {
  # ----------------------------------------------------------------- Course made
  # log existence
      &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
-                  ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
+                  ':'.&escape($inst_code).':'.&escape($course_owner).':'.
+                   &escape($crstype),$uhome);
      &flushcourselogs();
  # set toplevel url
      my $topurl=$url;
- Line 4074  sub is_locked {
+ Line 4568  sub is_locked {
  		      $env{'user.domain'},$env{'user.name'});
      my ($tmp)=keys(%locked);
      if ($tmp=~/^error:/) { undef(%locked); }
      if (ref($locked{$file_name}) eq 'ARRAY') {
-         $is_locked = 'true';
+         $is_locked = 'false';
+         foreach my $entry (@{$locked{$file_name}}) {
+            if (ref($entry) eq 'ARRAY') {
+                $is_locked = 'true';
+                last;
+            }
+        }
      } else {
          $is_locked = 'false';
      }
- Line 4165  sub files_not_in_path {
+ Line 4665  sub files_not_in_path {
      return (@return_files);
  }
- #--------------------------------------------------------------Get Marked as Read Only
+ #----------------------------------------------Get portfolio file permissions
+ sub get_portfile_permissions {
- sub get_marked_as_readonly {
+     my ($domain,$user) = @_;
-     my ($domain,$user,$what) = @_;
      my %current_permissions = &dump('file_permissions',$domain,$user);
      my ($tmp)=keys(%current_permissions);
      if ($tmp=~/^error:/) { undef(%current_permissions); }
+     return \%current_permissions;
+ }
+ #---------------------------------------------Get portfolio file access controls
+ sub get_access_controls {
+     my ($current_permissions,$group,$file) = @_;
+     my %access;
+     if (defined($file)) {
+         if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
+             foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
+                 $access{$file}{$control} = $$current_permissions{$file."\0".$control};
+             }
+         }
+     } else {
+         foreach my $key (keys(%{$current_permissions})) {
+             if ($key =~ /\0accesscontrol$/) {
+                 if (defined($group)) {
+                     if ($key !~ m-^\Q$group\E/-) {
+                         next;
+                     }
+                 }
+                 my ($fullpath) = split(/\0/,$key);
+                 if (ref($$current_permissions{$key}) eq 'HASH') {
+                     foreach my $control (keys(%{$$current_permissions{$key}})) {
+                         $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
+                     }
+                 }
+             }
+         }
+     }
+     return %access;
+ }
+ sub modify_access_controls {
+     my ($file_name,$changes,$domain,$user)=@_;
+     my ($outcome,$deloutcome);
+     my %store_permissions;
+     my %new_values;
+     my %new_control;
+     my %translation;
+     my @deletions = ();
+     my $now = time;
+     if (exists($$changes{'activate'})) {
+         if (ref($$changes{'activate'}) eq 'HASH') {
+             my @newitems = sort(keys(%{$$changes{'activate'}}));
+             my $numnew = scalar(@newitems);
+             for (my $i=0; $i<$numnew; $i++) {
+                 my $newkey = $newitems[$i];
+                 my $newid = &Apache::loncommon::get_cgi_id();
+                 $newkey =~ s/^(\d+)/$newid/;
+                 $translation{$1} = $newid;
+                 $new_values{$file_name."\0".$newkey} =
+                                           $$changes{'activate'}{$newitems[$i]};
+                 $new_control{$newkey} = $now;
+             }
+         }
+     }
+     my %todelete;
+     my %changed_items;
+     foreach my $action ('delete','update') {
+         if (exists($$changes{$action})) {
+             if (ref($$changes{$action}) eq 'HASH') {
+                 foreach my $key (keys(%{$$changes{$action}})) {
+                     my ($itemnum) = ($key =~ /^([^:]+):/);
+                     if ($action eq 'delete') {
+                         $todelete{$itemnum} = 1;
+                     } else {
+                         $changed_items{$itemnum} = $key;
+                     }
+                 }
+             }
+         }
+     }
+     # get lock on access controls for file.
+     my $lockhash = {
+                   $file_name."\0".'locked_access_records' => $env{'user.name'}.
+                                                        ':'.$env{'user.domain'},
+                    };
+     my $tries = 0;
+     my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
+     while (($gotlock ne 'ok') && $tries <3) {
+         $tries ++;
+         sleep 1;
+         $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
+     }
+     if ($gotlock eq 'ok') {
+         my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
+         my ($tmp)=keys(%curr_permissions);
+         if ($tmp=~/^error:/) { undef(%curr_permissions); }
+         if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
+             my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
+             if (ref($curr_controls) eq 'HASH') {
+                 foreach my $control_item (keys(%{$curr_controls})) {
+                     my ($itemnum) = ($control_item =~ /^([^:]+):/);
+                     if (defined($todelete{$itemnum})) {
+                         push(@deletions,$file_name."\0".$control_item);
+                     } else {
+                         if (defined($changed_items{$itemnum})) {
+                             $new_control{$changed_items{$itemnum}} = $now;
+                             push(@deletions,$file_name."\0".$control_item);
+                             $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
+                         } else {
+                             $new_control{$control_item} = $$curr_controls{$control_item};
+                         }
+                     }
+                 }
+             }
+         }
+         $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
+         $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
+         $outcome = &put('file_permissions',\%new_values,$domain,$user);
+         #  remove lock
+         my @del_lock = ($file_name."\0".'locked_access_records');
+         my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
+     } else {
+         $outcome = "error: could not obtain lockfile\n";
+     }
+     return ($outcome,$deloutcome,\%new_values,\%translation);
+ }
+ #------------------------------------------------------Get Marked as Read Only
+ sub get_marked_as_readonly {
+     my ($domain,$user,$what,$group) = @_;
+     my $current_permissions = &get_portfile_permissions($domain,$user);
      my @readonly_files;
      my $cmp1=$what;
      if (ref($what)) { $cmp1=join('',@{$what}) };
-     while (my ($file_name,$value) = each(%current_permissions)) {
+     while (my ($file_name,$value) = each(%{$current_permissions})) {
+         if (defined($group)) {
+             if ($file_name !~ m-^\Q$group\E/-) {
+                 next;
+             }
+         }
          if (ref($value) eq "ARRAY"){
              foreach my $stored_what (@{$value}) {
                  my $cmp2=$stored_what;
-                 if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
+                 if (ref($stored_what eq 'ARRAY')) {
+                     $cmp2=join('',@{$stored_what});
+                 }
                  if ($cmp1 eq $cmp2) {
                      push(@readonly_files, $file_name);
+                     last;
                  } elsif (!defined($what)) {
                      push(@readonly_files, $file_name);
+                     last;
                  }
              }
          }
      }
      return @readonly_files;
  }
  #-----------------------------------------------------------Get Marked as Read Only Hash
  sub get_marked_as_readonly_hash {
-     my ($domain,$user,$what) = @_;
+     my ($current_permissions,$group,$what) = @_;
-     my %current_permissions = &dump('file_permissions',$domain,$user);
-     my ($tmp)=keys(%current_permissions);
-     if ($tmp=~/^error:/) { undef(%current_permissions); }
      my %readonly_files;
-     while (my ($file_name,$value) = each(%current_permissions)) {
+     while (my ($file_name,$value) = each(%{$current_permissions})) {
+         if (defined($group)) {
+             if ($file_name !~ m-^\Q$group\E/-) {
+                 next;
+             }
+         }
          if (ref($value) eq "ARRAY"){
              foreach my $stored_what (@{$value}) {
-                 if ($stored_what eq $what) {
+                 if (ref($stored_what) eq 'ARRAY') {
-                     $readonly_files{$file_name} = 'locked';
+                     foreach my $lock_descriptor(@{$stored_what}) {
-                 } elsif (!defined($what)) {
+                         if ($lock_descriptor eq 'graded') {
-                     $readonly_files{$file_name} = 'locked';
+                             $readonly_files{$file_name} = 'graded';
-                 }
+                         } elsif ($lock_descriptor eq 'handback') {
+                             $readonly_files{$file_name} = 'handback';
+                         } else {
+                             if (!exists($readonly_files{$file_name})) {
+                                 $readonly_files{$file_name} = 'locked';
+                             }
+                         }
+                     }
+                 }
              }
          }
      }
- Line 4218  sub get_marked_as_readonly_hash {
+ Line 4862  sub get_marked_as_readonly_hash {
  sub unmark_as_readonly {
      # unmarks $file_name (if $file_name is defined), or all files locked by $what
      # for portfolio submissions, $what contains [$symb,$crsid]
-     my ($domain,$user,$what,$file_name) = @_;
+     my ($domain,$user,$what,$file_name,$group) = @_;
      my $symb_crs = $what;
      if (ref($what)) { $symb_crs=join('',@$what); }
-     my %current_permissions = &dump('file_permissions',$domain,$user);
+     my %current_permissions = &dump('file_permissions',$domain,$user,$group);
      my ($tmp)=keys(%current_permissions);
      if ($tmp=~/^error:/) { undef(%current_permissions); }
-     my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
+     my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
      foreach my $file (@readonly_files) {
  	if (defined($file_name) && ($file_name ne $file)) { next; }
  	my $current_locks = $current_permissions{$file};
- Line 4233  sub unmark_as_readonly {
+ Line 4877  sub unmark_as_readonly {
          if (ref($current_locks) eq "ARRAY"){
              foreach my $locker (@{$current_locks}) {
                  my $compare=$locker;
-                 if (ref($locker)) { $compare=join('',@{$locker}) };
+                 if (ref($locker) eq 'ARRAY') {
-                 if ($compare ne $symb_crs) {
+                     $compare=join('',@{$locker});
-                     push(@new_locks, $locker);
+                     if ($compare ne $symb_crs) {
+                         push(@new_locks, $locker);
+                     }
                  }
              }
              if (scalar(@new_locks) > 0) {
- Line 4373  sub GetFileTimestamp {
+ Line 5019  sub GetFileTimestamp {
      }
  }
+ sub stat_file {
+     my ($uri) = @_;
+     $uri = &clutter($uri);
+     # we want just the url part without the unneeded accessor url bits
+     if ($uri =~ m-^/adm/-) {
+ 	$uri=~s-^/adm/wrapper/-/-;
+ 	$uri=~s-^/adm/coursedocs/showdoc/-/-;
+     }
+     my ($udom,$uname,$file,$dir);
+     if ($uri =~ m-^/(uploaded|editupload)/-) {
+ 	($udom,$uname,$file) =
+ 	    ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
+ 	$file = 'userfiles/'.$file;
+ 	$dir = &propath($udom,$uname);
+     }
+     if ($uri =~ m-^/res/-) {
+ 	($udom,$uname) =
+ 	    ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
+ 	$file = $uri;
+     }
+     if (!$udom || !$uname || !$file) {
+ 	# unable to handle the uri
+ 	return ();
+     }
+     my ($result) = &dirlist($file,$udom,$uname,$dir);
+     my @stats = split('&', $result);
+     if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
+ 	shift(@stats); #filename is first
+ 	return @stats;
+     }
+     return ();
+ }
  # -------------------------------------------------------- Value of a Condition
+ # gets the value of a specific preevaluated condition
+ #    stored in the string  $env{user.state.<cid>}
+ # or looks up a condition reference in the bighash and if if hasn't
+ # already been evaluated recurses into docondval to get the value of
+ # the condition, then memoizing it to
+ #   $env{user.state.<cid>.<condition>}
  sub directcondval {
      my $number=shift;
      if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
  	&Apache::lonuserstate::evalstate();
      }
+     if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
+ 	return $env{'user.state.'.$env{'request.course.id'}.".$number"};
+     } elsif ($number =~ /^_/) {
+ 	my $sub_condition;
+ 	if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
+ 		&GDBM_READER(),0640)) {
+ 	    $sub_condition=$bighash{'conditions'.$number};
+ 	    untie(%bighash);
+ 	}
+ 	my $value = &docondval($sub_condition);
+ 	&appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
+ 	return $value;
+     }
      if ($env{'user.state.'.$env{'request.course.id'}}) {
         return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
      } else {
- Line 4387  sub directcondval {
+ Line 5089  sub directcondval {
      }
  }
+ # get the collection of conditions for this resource
  sub condval {
      my $condidx=shift;
-     my $result=0;
      my $allpathcond='';
-     foreach (split(/\|/,$condidx)) {
+     foreach my $cond (split(/\|/,$condidx)) {
-        if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
+ 	if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
- 	   $allpathcond.=
+ 	    $allpathcond.=
-                '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
+ 		'('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
-        }
+ 	}
      }
      $allpathcond=~s/\|$//;
-     if ($env{'request.course.id'}) {
+     return &docondval($allpathcond);
-        if ($allpathcond) {
+ }
-           my $operand='|';
- 	  my @stack;
+ #evaluates an expression of conditions
-            foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
+ sub docondval {
-               if ($_ eq '(') {
+     my ($allpathcond) = @_;
-                  push @stack,($operand,$result)
+     my $result=0;
-               } elsif ($_ eq ')') {
+     if ($env{'request.course.id'}
-                   my $before=pop @stack;
+ 	&& defined($allpathcond)) {
- 		  if (pop @stack eq '&') {
+ 	my $operand='|';
- 		      $result=$result>$before?$before:$result;
+ 	my @stack;
-                   } else {
+ 	foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
-                       $result=$result>$before?$result:$before;
+ 	    if ($chunk eq '(') {
-                   }
+ 		push @stack,($operand,$result);
-               } elsif (($_ eq '&') || ($_ eq '|')) {
+ 	    } elsif ($chunk eq ')') {
-                   $operand=$_;
+ 		my $before=pop @stack;
-               } else {
+ 		if (pop @stack eq '&') {
-                   my $new=directcondval($_);
+ 		    $result=$result>$before?$before:$result;
-                   if ($operand eq '&') {
+ 		} else {
-                      $result=$result>$new?$new:$result;
+ 		    $result=$result>$before?$result:$before;
-                   } else {
+ 		}
-                      $result=$result>$new?$result:$new;
+ 	    } elsif (($chunk eq '&') || ($chunk eq '|')) {
-                   }
+ 		$operand=$chunk;
-               }
+ 	    } else {
-           }
+ 		my $new=directcondval($chunk);
-        }
+ 		if ($operand eq '&') {
+ 		    $result=$result>$new?$new:$result;
+ 		} else {
+ 		    $result=$result>$new?$result:$new;
+ 		}
+ 	    }
+ 	}
      }
      return $result;
  }
- Line 4540  sub EXT_cache_set {
+ Line 5248  sub EXT_cache_set {
  # --------------------------------------------------------- Value of a Variable
  sub EXT {
-     my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
+     my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
      unless ($varname) { return ''; }
      #get real user name/domain, courseid and symb
      my $courseid;
- Line 4574  sub EXT {
+ Line 5282  sub EXT {
  	    if ( (defined($Apache::lonhomework::parsing_a_problem)
  		  || defined($Apache::lonhomework::parsing_a_task))
  		 &&
  		 ($symbparm eq &symbread()) ) {
- 		return $Apache::lonhomework::history{$qualifierrest};
+ 		# if we are in the middle of processing the resource the
+ 		# get the value we are planning on committing
+                 if (defined($Apache::lonhomework::results{$qualifierrest})) {
+                     return $Apache::lonhomework::results{$qualifierrest};
+                 } else {
+                     return $Apache::lonhomework::history{$qualifierrest};
+                 }
  	    } else {
  		my %restored;
  		if ($publicuser || $env{'request.state'} eq 'construct') {
- Line 4638  sub EXT {
+ Line 5352  sub EXT {
  # ------------------------------------------------------------- request.browser
          if ($space eq 'browser') {
  	    if ($qualifier eq 'textremote') {
- 		if (&mt('textual_remote_display') eq 'on') {
+ 		if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
  		    return 1;
  		} else {
  		    return 0;
- Line 4655  sub EXT {
+ Line 5369  sub EXT {
          return $env{'course.'.$courseid.'.'.$spacequalifierrest};
      } elsif ($realm eq 'resource') {
- 	my $section;
  	if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
  	    if (!$symbparm) { $symbparm=&symbread(); }
  	}
+ 	if ($space eq 'title') {
+ 	    if (!$symbparm) { $symbparm = $env{'request.filename'}; }
+ 	    return &gettitle($symbparm);
+ 	}
+ 	if ($space eq 'map') {
+ 	    my ($map) = &decode_symb($symbparm);
+ 	    return &symbread($map);
+ 	}
+ 	my ($section, $group, @groups);
  	my ($courselevelm,$courselevel);
  	if ($symbparm && defined($courseid) &&
  	    $courseid eq $env{'request.course.id'}) {
- Line 4667  sub EXT {
+ Line 5392  sub EXT {
  # ----------------------------------------------------- Cascading lookup scheme
  	    my $symbp=$symbparm;
- 	    my $mapp=(&decode_symb($symbp))[0];
+ 	    my $mapp=&deversion((&decode_symb($symbp))[0]);
  	    my $symbparm=$symbp.'.'.$spacequalifierrest;
  	    my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
- Line 4675  sub EXT {
+ Line 5400  sub EXT {
  	    if (($env{'user.name'} eq $uname) &&
  		($env{'user.domain'} eq $udom)) {
  		$section=$env{'request.course.sec'};
+                 @groups = split(/:/,$env{'request.course.groups'});
+                 @groups=&sort_course_groups($courseid,@groups);
  	    } else {
  		if (! defined($usection)) {
  		    $section=&getsection($udom,$uname,$courseid);
  		} else {
  		    $section = $usection;
  		}
+                 @groups = &get_users_groups($udom,$uname,$courseid);
  	    }
  	    my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
- Line 4696  sub EXT {
+ Line 5424  sub EXT {
  	    my $userreply=&resdata($uname,$udom,'user',
  				       ($courselevelr,$courselevelm,
  					$courselevel));
  	    if (defined($userreply)) { return $userreply; }
  # ------------------------------------------------ second, check some of course
+             my $coursereply;
+             if (@groups > 0) {
+                 $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
+                                        $mapparm,$spacequalifierrest);
+                 if (defined($coursereply)) { return $coursereply; }
+             }
- 	    my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
+ 	    $coursereply=&resdata($env{'course.'.$courseid.'.num'},
  				     $env{'course.'.$courseid.'.domain'},
  				     'course',
  				     ($seclevelr,$seclevelm,$seclevel,
- Line 4772  sub EXT {
+ Line 5505  sub EXT {
  	if ($space eq 'time') {
  	    return time;
          }
+     } elsif ($realm eq 'server') {
+ # ----------------------------------------------------------------- system.time
+ 	if ($space eq 'name') {
+ 	    return $ENV{'SERVER_NAME'};
+         }
      }
      return '';
  }
+ sub check_group_parms {
+     my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
+     my @groupitems = ();
+     my $resultitem;
+     my @levels = ($symbparm,$mapparm,$what);
+     foreach my $group (@{$groups}) {
+         foreach my $level (@levels) {
+              my $item = $courseid.'.['.$group.'].'.$level;
+              push(@groupitems,$item);
+         }
+     }
+     my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
+                             $env{'course.'.$courseid.'.domain'},
+                                      'course',@groupitems);
+     return $coursereply;
+ }
+ sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
+     my ($courseid,@groups) = @_;
+     @groups = sort(@groups);
+     return @groups;
+ }
  sub packages_tab_default {
      my ($uri,$varname)=@_;
      my (undef,$part,$name)=split(/\./,$varname);
-     my $packages=&metadata($uri,'packages');
-     foreach my $package (split(/,/,$packages)) {
+     my (@extension,@specifics,$do_default);
+     foreach my $package (split(/,/,&metadata($uri,'packages'))) {
  	my ($pack_type,$pack_part)=split(/_/,$package,2);
+ 	if ($pack_type eq 'default') {
+ 	    $do_default=1;
+ 	} elsif ($pack_type eq 'extension') {
+ 	    push(@extension,[$package,$pack_type,$pack_part]);
+ 	} else {
+ 	    push(@specifics,[$package,$pack_type,$pack_part]);
+ 	}
+     }
+     # first look for a package that matches the requested part id
+     foreach my $package (@specifics) {
+ 	my (undef,$pack_type,$pack_part)=@{$package};
+ 	next if ($pack_part ne $part);
+ 	if (defined($packagetab{"$pack_type&$name&default"})) {
+ 	    return $packagetab{"$pack_type&$name&default"};
+ 	}
+     }
+     # look for any possible matching non extension_ package
+     foreach my $package (@specifics) {
+ 	my (undef,$pack_type,$pack_part)=@{$package};
  	if (defined($packagetab{"$pack_type&$name&default"})) {
  	    return $packagetab{"$pack_type&$name&default"};
  	}
- Line 4790  sub packages_tab_default {
+ Line 5571  sub packages_tab_default {
  	    return $packagetab{$pack_type."_".$pack_part."&$name&default"};
  	}
      }
+     # look for any posible extension_ match
+     foreach my $package (@extension) {
+ 	my ($package,$pack_type)=@{$package};
+ 	if (defined($packagetab{"$pack_type&$name&default"})) {
+ 	    return $packagetab{"$pack_type&$name&default"};
+ 	}
+ 	if (defined($packagetab{$package."&$name&default"})) {
+ 	    return $packagetab{$package."&$name&default"};
+ 	}
+     }
+     # look for a global default setting
+     if ($do_default && defined($packagetab{"default&$name&default"})) {
+ 	return $packagetab{"default&$name&default"};
+     }
      return undef;
  }
- Line 4875  sub metadata {
+ Line 5670  sub metadata {
  		    } else {
  			$metaentry{':packages'}=$package.$keyroot;
  		    }
- 		    foreach (sort keys %packagetab) {
+ 		    foreach my $pack_entry (keys(%packagetab)) {
  			my $part=$keyroot;
  			$part=~s/^\_//;
- 			if ($_=~/^\Q$package\E\&/ ||
+ 			if ($pack_entry=~/^\Q$package\E\&/ ||
- 			    $_=~/^\Q$package\E_0\&/) {
+ 			    $pack_entry=~/^\Q$package\E_0\&/) {
- 			    my ($pack,$name,$subp)=split(/\&/,$_);
+ 			    my ($pack,$name,$subp)=split(/\&/,$pack_entry);
  			    # ignore package.tab specified default values
                              # here &package_tab_default() will fetch those
  			    if ($subp eq 'default') { next; }
- 			    my $value=$packagetab{$_};
+ 			    my $value=$packagetab{$pack_entry};
  			    my $unikey;
  			    if ($pack =~ /_0$/) {
  				$unikey='parameter_0_'.$name;
- Line 4932  sub metadata {
+ Line 5727  sub metadata {
  			    my $dir=$filename;
  			    $dir=~s|[^/]*$||;
  			    $location=&filelocation($dir,$location);
- 			    foreach (sort(split(/\,/,&metadata($uri,'keys',
+ 			    my $metadata =
- 							       $location,$unikey,
+ 				&metadata($uri,'keys', $location,$unikey,
- 							       $depthcount+1)))) {
+ 					  $depthcount+1);
- 				$metaentry{':'.$_}=$metaentry{':'.$_};
+ 			    foreach my $meta (split(',',$metadata)) {
- 				$metathesekeys{$_}=1;
+ 				$metaentry{':'.$meta}=$metaentry{':'.$meta};
+ 				$metathesekeys{$meta}=1;
  			    }
  			}
  		    } else {
- Line 4945  sub metadata {
+ Line 5741  sub metadata {
  			    $unikey.='_'.$token->[2]->{'name'};
  			}
  			$metathesekeys{$unikey}=1;
- 			foreach (@{$token->[3]}) {
+ 			foreach my $param (@{$token->[3]}) {
- 			    $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
+ 			    $metaentry{':'.$unikey.'.'.$param} =
+ 				$token->[2]->{$param};
  			}
  			my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
  			my $default=$metaentry{':'.$unikey.'.default'};
- Line 4967  sub metadata {
+ Line 5764  sub metadata {
  	    }
  	}
  	my ($extension) = ($uri =~ /\.(\w+)$/);
- 	foreach my $key (sort(keys(%packagetab))) {
+ 	foreach my $key (keys(%packagetab)) {
  	    #no specific packages #how's our extension
  	    if ($key!~/^extension_\Q$extension\E&/) { next; }
  	    &metadata_create_package_def($uri,$key,'extension_'.$extension,
  					 \%metathesekeys);
  	}
  	if (!exists($metaentry{':packages'})) {
- 	    foreach my $key (sort(keys(%packagetab))) {
+ 	    foreach my $key (keys(%packagetab)) {
  		#no specific packages well let's get default then
  		if ($key!~/^default&/) { next; }
  		&metadata_create_package_def($uri,$key,'default',
- Line 4992  sub metadata {
+ Line 5789  sub metadata {
  		my $dir=$filename;
  		$dir=~s|[^/]*$||;
  		$location=&filelocation($dir,$location);
- 		foreach (sort(split(/\,/,&metadata($uri,'keys',
+ 		my $rights_metadata =
- 						   $location,'_rights',
+ 		    &metadata($uri,'keys',$location,'_rights',
- 						   $depthcount+1)))) {
+ 			      $depthcount+1);
- 		    #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
+ 		foreach my $rights (split(',',$rights_metadata)) {
- 		    $metathesekeys{$_}=1;
+ 		    #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
+ 		    $metathesekeys{$rights}=1;
  		}
  	    }
  	}
- 	$metaentry{':keys'}=join(',',keys %metathesekeys);
+ 	# uniqifiy package listing
+ 	my %seen;
+ 	my @uniq_packages =
+ 	    grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
+ 	$metaentry{':packages'} = join(',',@uniq_packages);
+ 	$metaentry{':keys'} = join(',',keys(%metathesekeys));
  	&metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
  	$metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
- 	&do_cache_new('meta',$uri,\%metaentry,60*60*24);
+ 	&do_cache_new('meta',$uri,\%metaentry,60*60);
  # this is the end of "was not already recently cached
      }
      return $metaentry{':'.$what};
- Line 5036  sub metadata_create_package_def {
+ Line 5840  sub metadata_create_package_def {
  sub metadata_generate_part0 {
      my ($metadata,$metacache,$uri) = @_;
      my %allnames;
-     foreach my $metakey (sort keys %$metadata) {
+     foreach my $metakey (keys(%$metadata)) {
  	if ($metakey=~/^parameter\_(.*)/) {
  	  my $part=$$metacache{':'.$metakey.'.part'};
  	  my $name=$$metacache{':'.$metakey.'.name'};
- Line 5099  sub get_slot {
+ Line 5903  sub get_slot {
  	$cdom=$env{'course.'.$courseid.'.domain'};
  	$cnum=$env{'course.'.$courseid.'.num'};
      }
-     my %slotinfo=&get('slots',[$which],$cdom,$cnum);
+     my $key=join("\0",'slots',$cdom,$cnum,$which);
-     &Apache::lonhomework::showhash(%slotinfo);
+     my %slotinfo;
-     my ($tmp)=keys(%slotinfo);
+     if (exists($remembered{$key})) {
-     if ($tmp=~/^error:/) { return (); }
+ 	$slotinfo{$which} = $remembered{$key};
+     } else {
+ 	%slotinfo=&get('slots',[$which],$cdom,$cnum);
+ 	&Apache::lonhomework::showhash(%slotinfo);
+ 	my ($tmp)=keys(%slotinfo);
+ 	if ($tmp=~/^error:/) { return (); }
+ 	$remembered{$key} = $slotinfo{$which};
+     }
      if (ref($slotinfo{$which}) eq 'HASH') {
  	return %{$slotinfo{$which}};
      }
- Line 5117  sub symblist {
+ Line 5928  sub symblist {
      if (($env{'request.course.fn'}) && (%newhash)) {
          if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                        &GDBM_WRCREAT(),0640)) {
- 	    foreach (keys %newhash) {
+ 	    foreach my $url (keys %newhash) {
-                 $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
+ 		next if ($url eq 'last_known'
- 						  $newhash{$_}->[0]);
+ 			 && $env{'form.no_update_last_known'});
+ 		$hash{declutter($url)}=&encode_symb($mapname,
+ 						    $newhash{$url}->[1],
+ 						    $newhash{$url}->[0]);
              }
              if (untie(%hash)) {
  		return 'ok';
- Line 5136  sub symbverify {
+ Line 5950  sub symbverify {
      my $thisfn=$thisurl;
  # wrapper not part of symbs
      $thisfn=~s/^\/adm\/wrapper//;
+     $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
      $thisfn=&declutter($thisfn);
  # direct jump to resource in page or to a sequence - will construct own symbs
      if ($thisfn=~/\.(page|sequence)$/) { return 1; }
- Line 5190  sub symbclean {
+ Line 6005  sub symbclean {
  # remove wrapper
      $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
+     $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
      return $symb;
  }
- Line 5266  sub symbread {
+ Line 6082  sub symbread {
          if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
              $targetfn = 'adm/wrapper/'.$thisfn;
          }
+ 	if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
+ 	    $targetfn=$1;
+ 	}
          if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                        &GDBM_READER(),0640)) {
  	    $syval=$hash{$targetfn};
- Line 5379  sub numval3 {
+ Line 6198  sub numval3 {
      return $total;
  }
+ sub digest {
+     my ($data)=@_;
+     my $digest=&Digest::MD5::md5($data);
+     my ($a,$b,$c,$d)=unpack("iiii",$digest);
+     my ($e,$f);
+     {
+         use integer;
+         $e=($a+$b);
+         $f=($c+$d);
+         if ($_64bit) {
+             $e=(($e<<32)>>32);
+             $f=(($f<<32)>>32);
+         }
+     }
+     if (wantarray) {
+ 	return ($e,$f);
+     } else {
+ 	my $g;
+ 	{
+ 	    use integer;
+ 	    $g=($e+$f);
+ 	    if ($_64bit) {
+ 		$g=(($g<<32)>>32);
+ 	    }
+ 	}
+ 	return $g;
+     }
+ }
  sub latest_rnd_algorithm_id {
-     return '64bit4';
+     return '64bit5';
  }
  sub get_rand_alg {
- Line 5420  sub rndseed {
+ Line 6268  sub rndseed {
      if (!$username) { $username=$wusername }
      my $which=&get_rand_alg();
      if (defined(&getCODE())) {
- 	if ($which eq '64bit4') {
+ 	if ($which eq '64bit5') {
+ 	    return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
+ 	} elsif ($which eq '64bit4') {
  	    return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
  	} else {
  	    return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
  	}
+     } elsif ($which eq '64bit5') {
+ 	return &rndseed_64bit5($symb,$courseid,$domain,$username);
      } elsif ($which eq '64bit4') {
  	return &rndseed_64bit4($symb,$courseid,$domain,$username);
      } elsif ($which eq '64bit3') {
- Line 5547  sub rndseed_64bit4 {
+ Line 6399  sub rndseed_64bit4 {
      }
  }
+ sub rndseed_64bit5 {
+     my ($symb,$courseid,$domain,$username)=@_;
+     my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
+     return "$num1:$num2";
+ }
  sub rndseed_CODE_64bit {
      my ($symb,$courseid,$domain,$username)=@_;
      {
- Line 5585  sub rndseed_CODE_64bit4 {
+ Line 6443  sub rndseed_CODE_64bit4 {
      }
  }
+ sub rndseed_CODE_64bit5 {
+     my ($symb,$courseid,$domain,$username)=@_;
+     my $code = &getCODE();
+     my ($num1,$num2)=&digest("$symb,$courseid,$code");
+     return "$num1:$num2";
+ }
  sub setup_random_from_rndseed {
      my ($rndseed)=@_;
      if ($rndseed =~/([,:])/) {
- Line 5791  sub filelocation {
+ Line 6656  sub filelocation {
      my ($dir,$file) = @_;
      my $location;
      $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
+     if ($file =~ m-^/adm/-) {
+ 	$file=~s-^/adm/wrapper/-/-;
+ 	$file=~s-^/adm/coursedocs/showdoc/-/-;
+     }
      if ($file=~m:^/~:) { # is a contruction space reference
          $location = $file;
          $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
- Line 5805  sub filelocation {
+ Line 6675  sub filelocation {
          my @ids=&current_machine_ids();
          foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
          if ($is_me) {
-   	    $location=&Apache::loncommon::propath($udom,$uname).
+   	    $location=&propath($udom,$uname).
    	      '/userfiles/'.$filename;
          } else {
    	  $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
- Line 5830  sub hreflocation {
+ Line 6700  sub hreflocation {
      my ($dir,$file)=@_;
      unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
  	$file=filelocation($dir,$file);
+     } elsif ($file=~m-^/adm/-) {
+ 	$file=~s-^/adm/wrapper/-/-;
+ 	$file=~s-^/adm/coursedocs/showdoc/-/-;
      }
      if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
  	$file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
- Line 5873  sub declutter {
+ Line 6746  sub declutter {
      if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
      $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
      $thisfn=~s/^\///;
+     $thisfn=~s|^adm/wrapper/||;
+     $thisfn=~s|^adm/coursedocs/showdoc/||;
      $thisfn=~s/^res\///;
      $thisfn=~s/\?.+$//;
      return $thisfn;
- Line 5885  sub clutter {
+ Line 6760  sub clutter {
      unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
         $thisfn='/res'.$thisfn;
      }
+     if ($thisfn !~m|/adm|) {
+ 	if ($thisfn =~ m|/ext/|) {
+ 	    $thisfn='/adm/wrapper'.$thisfn;
+ 	} else {
+ 	    my ($ext) = ($thisfn =~ /\.(\w+)$/);
+ 	    my $embstyle=&Apache::loncommon::fileembstyle($ext);
+ 	    if ($embstyle eq 'ssi'
+ 		|| ($embstyle eq 'hdn')
+ 		|| ($embstyle eq 'rat')
+ 		|| ($embstyle eq 'prv')
+ 		|| ($embstyle eq 'ign')) {
+ 		#do nothing with these
+ 	    } elsif (($embstyle eq 'img')
+ 		|| ($embstyle eq 'emb')
+ 		|| ($embstyle eq 'wrp')) {
+ 		$thisfn='/adm/wrapper'.$thisfn;
+ 	    } elsif ($embstyle eq 'unk'
+ 		     && $thisfn!~/\.(sequence|page)$/) {
+ 		$thisfn='/adm/coursedocs/showdoc'.$thisfn;
+ 	    } else {
+ #		&logthis("Got a blank emb style");
+ 	    }
+ 	}
+     }
      return $thisfn;
  }
- Line 5897  sub freeze_escape {
+ Line 6796  sub freeze_escape {
      return &escape($value);
  }
- # -------------------------------------------------------- Escape Special Chars
- sub escape {
-     my $str=shift;
-     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
-     return $str;
- }
- # ----------------------------------------------------- Un-Escape Special Chars
- sub unescape {
-     my $str=shift;
-     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
-     return $str;
- }
  sub thaw_unescape {
      my ($value)=@_;
- Line 5923  sub thaw_unescape {
+ Line 6807  sub thaw_unescape {
      return &unescape($value);
  }
- sub mod_perl_version {
-     return 1;
-     if (defined($perlvar{'MODPERL2'})) {
- 	return 2;
-     }
- }
  sub correct_line_ends {
      my ($result)=@_;
      $$result =~s/\r\n/\n/mg;
- Line 5956  sub goodbye {
+ Line 6833  sub goodbye {
     &logthis(sprintf("%-20s is %s",'hits',$hits));
     &flushcourselogs();
     &logthis("Shutting down");
-    return DONE;
  }
  BEGIN {
- Line 6000  BEGIN {
+ Line 6876  BEGIN {
  #           next if /^\#/;
             chomp;
             my ($domain, $domain_description, $def_auth, $def_auth_arg,
- 	       $def_lang, $city, $longi, $lati) = split(/:/,$_);
+ 	       $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
  	   $domain_auth_def{$domain}=$def_auth;
             $domain_auth_arg_def{$domain}=$def_auth_arg;
  	   $domaindescription{$domain}=$domain_description;
- Line 6008  BEGIN {
+ Line 6884  BEGIN {
  	   $domain_city{$domain}=$city;
  	   $domain_longi{$domain}=$longi;
  	   $domain_lati{$domain}=$lati;
+            $domain_primary{$domain}=$primary;
   #         &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
  #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
- Line 6092  sub get_iphost {
+ Line 6969  sub get_iphost {
      while (my $configline=<$config>) {
  	chomp($configline);
  	if ($configline) {
- 	    my ($short,$plain)=split(/:/,$configline);
+ 	    my ($short,@plain)=split(/:/,$configline);
- 	    if ($plain ne '') { $prp{$short}=$plain; }
+             %{$prp{$short}} = ();
+ 	    if (@plain > 0) {
+                 $prp{$short}{'std'} = $plain[0];
+                 for (my $i=1; $i<@plain; $i++) {
+                     $prp{$short}{'alt'.$i} = $plain[$i];
+                 }
+             }
  	}
      }
      close($config);
- Line 6708  all args are optional
+ Line 7591  all args are optional
  =item *
+ dumpstore($namespace,$udom,$uname,$regexp,$range) :
+ dumps the complete (or key matching regexp) namespace into a hash
+ ($udom, $uname, $regexp, $range are optional) for a namespace that is
+ normally &store()ed into
+ $range should be either an integer '100' (give me the first 100
+                                            matching records)
+               or be  two integers sperated by a - with no spaces
+                  '30-50' (give me the 30th through the 50th matching
+                           records)
+ =item *
+ putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
+ replaces a &store() version of data with a replacement set of data
+ for a particular resource in a namespace passed in the $storehash hash
+ reference
+ =item *
  tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
  works very similar to store/cstore, but all data is stored in a
  temporary location and can be reset using tmpreset, $storehash should
- Line 6737  namesp ($udom and $uname are optional)
+ Line 7641  namesp ($udom and $uname are optional)
  =item *
- dump($namespace,$udom,$uname,$regexp) :
+ dump($namespace,$udom,$uname,$regexp,$range) :
  dumps the complete (or key matching regexp) namespace into a hash
- ($udom, $uname and $regexp are optional)
+ ($udom, $uname, $regexp, $range are optional)
+ $range should be either an integer '100' (give me the first 100
+                                            matching records)
+               or be  two integers sperated by a - with no spaces
+                  '30-50' (give me the 30th through the 50th matching
+                           records)
  =item *
  inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
- Line 6756  put($namespace,$storehash,$udom,$uname)
+ Line 7665  put($namespace,$storehash,$udom,$uname)
  =item *
- putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
+ cput($namespace,$storehash,$udom,$uname) : critical put
- keys used in storehash include version information (e.g., 1:$symb:message etc.) as
+ ($udom and $uname are optional)
- used in records written by &store and retrieved by &restore.  This function
- was created for use in editing discussion posts, without incrementing the
- version number included in the key for a particular post. The colon
- separated list of attribute names (e.g., the value associated with the key
-:keys:$symb) is also generated and passed in the ampersand separated
- items sent to lonnet::reply().
  =item *
- cput($namespace,$storehash,$udom,$uname) : critical put
+ newput($namespace,$storehash,$udom,$uname) :
- ($udom and $uname are optional)
+ Attempts to store the items in the $storehash, but only if they don't
+ currently exist, if this succeeds you can be certain that you have
+ successfully created a new key value pair in the $namespace db.
+ Args:
+  $namespace: name of database to store values to
+  $storehash: hashref to store to the db
+  $udom: (optional) domain of user containing the db
+  $uname: (optional) name of user caontaining the db
+ Returns:
+  'ok' -> succeeded in storing all keys of $storehash
+  'key_exists: <key>' -> failed to anything out of $storehash, as at
+                         least <key> already existed in the db (other
+                         requested keys may also already exist)
+  'error: <msg>' -> unable to tie the DB or other erorr occured
+  'con_lost' -> unable to contact request server
+  'refused' -> action was not allowed by remote machine
  =item *
- Line 6896  getfile($file,$caller) : two cases - req
+ Line 7819  getfile($file,$caller) : two cases - req
     - returns the entire contents of a file or -1;
     it properly subscribes to and replicates the file if neccessary.
+ =item *
+ stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
+                   reference
+ returns either a stat() list of data about the file or an empty list
+ if the file doesn't exist or couldn't find out about it (connection
+ problems or user unknown)
  =item *
  filelocation($dir,$file) : returns file system location of a file
- Line 6996  removeuploadedurl(): convience function
+ Line 7929  removeuploadedurl(): convience function
    Args:
     url:  a full /uploaded/... url to delete
+ =item *
+ get_portfile_permissions():
+   Args:
+     domain: domain of user or course contain the portfolio files
+     user: name of user or num of course contain the portfolio files
+   Returns:
+     hashref of a dump of the proper file_permissions.db
+ =item *
+ get_access_controls():
+ Args:
+   current_permissions: the hash ref returned from get_portfile_permissions()
+   group: (optional) the group you want the files associated with
+   file: (optional) the file you want access info on
+ Returns:
+     a hash (keys are file names) of hashes containing
+         keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
+         values are XML containing access control settings (see below)
+ Internal notes:
+  access controls are stored in file_permissions.db as key=value pairs.
+     key -> path to file/file_name\0uniqueID:scope_end_start
+         where scope -> public,guest,course,group,domains or users.
+               end -> UNIX time for end of access (0 -> no end date)
+               start -> UNIX time for start of access
+     value -> XML description of access control
+            <scope type=""> (type =1 of: public,guest,course,group,domains,users">
+             <start></start>
+             <end></end>
+             <password></password>  for scope type = guest
+             <domain></domain>     for scope type = course or group
+             <number></number>
+             <roles id="">
+              <role></role>
+              <access></access>
+              <section></section>
+              <group></group>
+             </roles>
+             <dom></dom>         for scope type = domains
+             <users>             for scope type = users
+              <user>
+               <uname></uname>
+               <udom></udom>
+              </user>
+             </users>
+            </scope>
+  Access data is also aggregated for each file in an additional key=value pair:
+  key -> path to file/file_name\0accesscontrol
+  value -> reference to hash
+           hash contains key = value pairs
+           where key = uniqueID:scope_end_start
+                 value = UNIX time record was last updated
+           Used to improve speed of look-ups of access controls for each file.
+  Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
+ parse_access_controls():
+ Parses XML of an access control record
+ Args
+. Text string (XML) of access comtrol record
+ Returns:
+. Hash of access control settings.
+ modify_access_controls():
+ Modifies access controls for a portfolio file
+ Args
+. file name
+. reference to hash of required changes,
+. domain
+. username
+   where domain,username are the domain of the portfolio owner
+   (either a user or a course)
+ Returns:
+. result of additions or updates ('ok' or 'error', with error message).
+. result of deletions ('ok' or 'error', with error message).
+. reference to hash of any new or updated access controls.
+. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
+    key = integer (inbound ID)
+    value = uniqueID
  =back
  =head2 HTTP Helper Routines

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	Added in v.1.757