X-Git-Url: https://git.p6c8.net/devedit.git/blobdiff_plain/863abbbee47daf6df718856079cb50833e3552c2..1574cddbc1107a6119116328e9696a65108f867b:/modules/Command.pm

diff --git a/modules/Command.pm b/modules/Command.pm
index cddb5ca..1479e2a 100644
--- a/modules/Command.pm
+++ b/modules/Command.pm
@@ -6,7 +6,7 @@ package Command;
 # Execute Dev-Editor's commands
 #
 # Author:        Patrick Canterino <patshaping@gmx.net>
-# Last modified: 2004-02-23
+# Last modified: 2004-10-22
 #
 
 use strict;
@@ -26,6 +26,7 @@ use Output;
 use Template;
 
 my $script = $ENV{'SCRIPT_NAME'};
+my $users  = eval("getpwuid(0)") && eval("getgrgid(0)");
 
 my %dispatch = ('show'       => \&exec_show,
                 'beginedit'  => \&exec_beginedit,
@@ -33,10 +34,13 @@ my %dispatch = ('show'       => \&exec_show,
                 'endedit'    => \&exec_endedit,
                 'mkdir'      => \&exec_mkdir,
                 'mkfile'     => \&exec_mkfile,
+                'upload'     => \&exec_upload,
                 'copy'       => \&exec_copy,
                 'rename'     => \&exec_rename,
                 'remove'     => \&exec_remove,
-                'unlock'     => \&exec_unlock
+                'chprop'     => \&exec_chprop,
+                'unlock'     => \&exec_unlock,
+                'about'      => \&exec_about
                );
 
 ### Export ###
@@ -59,10 +63,16 @@ sub exec_command($$$)
 {
  my ($command,$data,$config) = @_;
 
- return error($config->{'err_cmd_unknown'},'/',{COMMAND => $command}) unless($dispatch{$command});
+ foreach(keys(%dispatch))
+ {
+  if(lc($_) eq lc($command))
+  {
+   my $output = &{$dispatch{$_}}($data,$config);
+   return $output;
+  }
+ }
 
- my $output = &{$dispatch{$command}}($data,$config);
- return $output;
+ return error($config->{'errors'}->{'cmd_unknown'},'/',{COMMAND => $command});
 }
 
 # exec_show()
@@ -79,6 +89,7 @@ sub exec_show($$)
  my ($data,$config) = @_;
  my $physical       = $data->{'physical'};
  my $virtual        = $data->{'virtual'};
+ my $uselist        = $data->{'uselist'};
 
  my $tpl = new Template;
 
@@ -102,7 +113,7 @@ sub exec_show($$)
    my @stat  = stat($physical."/..");
 
    my $udtpl = new Template;
-   $udtpl->read_file($config->{'tpl_dirlist_up'});
+   $udtpl->read_file($config->{'templates'}->{'dirlist_up'});
 
    $udtpl->fillin("UPPER_DIR",encode_entities(upper_path($virtual)));
    $udtpl->fillin("DATE",strftime($config->{'timeformat'},localtime($stat[9])));
@@ -118,11 +129,14 @@ sub exec_show($$)
    my $virt_path = encode_entities($virtual.$dir."/");
 
    my $dtpl = new Template;
-   $dtpl->read_file($config->{'tpl_dirlist_dir'});
+   $dtpl->read_file($config->{'templates'}->{'dirlist_dir'});
 
    $dtpl->fillin("DIR",$virt_path);
    $dtpl->fillin("DIR_NAME",$dir);
    $dtpl->fillin("DATE",strftime($config->{'timeformat'},localtime($stat[9])));
+   $dtpl->fillin("URL",equal_url($config->{'httproot'},$virt_path));
+
+   $dtpl->parse_if_block("users",$users && -o $physical."/".$dir);
 
    $dirlist .= $dtpl->get_template;
   }
@@ -135,30 +149,36 @@ sub exec_show($$)
    my $virt_path = encode_entities($virtual.$file);
 
    my @stat      = stat($phys_path);
-   my $in_use    = $data->{'uselist'}->in_use($virtual.$file);
+   my $in_use    = $uselist->in_use($virtual.$file);
 
    my $ftpl = new Template;
-   $ftpl->read_file($config->{'tpl_dirlist_file'});
+   $ftpl->read_file($config->{'templates'}->{'dirlist_file'});
 
    $ftpl->fillin("FILE",$virt_path);
    $ftpl->fillin("FILE_NAME",$file);
    $ftpl->fillin("SIZE",$stat[7]);
    $ftpl->fillin("DATE",strftime($config->{'timeformat'},localtime($stat[9])));
+   $ftpl->fillin("URL",equal_url($config->{'httproot'},$virt_path));
 
    $ftpl->parse_if_block("not_readable",not -r $phys_path);
    $ftpl->parse_if_block("binary",-B $phys_path);
    $ftpl->parse_if_block("readonly",not -w $phys_path);
 
-   $ftpl->parse_if_block("viewable",-r $phys_path && -T $phys_path);
-   $ftpl->parse_if_block("editable",-w $phys_path && -r $phys_path && -T $phys_path && not $in_use);
+   $ftpl->parse_if_block("viewable",-r $phys_path && -T $phys_path && not ($config->{'max_file_size'} && $stat[7] > $config->{'max_file_size'}));
+
+   $ftpl->parse_if_block("editable",-r $phys_path && -w $phys_path && -T $phys_path && not ($config->{'max_file_size'} && $stat[7] > $config->{'max_file_size'}) && not $in_use);
 
    $ftpl->parse_if_block("in_use",$in_use);
    $ftpl->parse_if_block("unused",not $in_use);
 
+   $ftpl->parse_if_block("too_large",$config->{'max_file_size'} && $stat[7] > $config->{'max_file_size'});
+
+   $ftpl->parse_if_block("users",$users && -o $phys_path);
+
    $dirlist .= $ftpl->get_template;
   }
 
-  $tpl->read_file($config->{'tpl_dirlist'});
+  $tpl->read_file($config->{'templates'}->{'dirlist'});
 
   $tpl->fillin("DIRLIST",$dirlist);
   $tpl->fillin("DIR",$virtual);
@@ -169,7 +189,7 @@ sub exec_show($$)
  {
   # View a file
 
-  return error($config->{'err_noview'},upper_path($virtual)) unless(-r $physical);
+  return error($config->{'errors'}->{'noview'},upper_path($virtual)) unless(-r $physical);
 
   # Check on binary files
   # We have to do it in this way, or empty files
@@ -179,22 +199,33 @@ sub exec_show($$)
   {
    # Binary file
 
-   return error($config->{'err_binary'},upper_path($virtual));
+   return error($config->{'errors'}->{'binary'},upper_path($virtual));
   }
   else
   {
    # Text file
 
-   my $content =  file_read($physical);
-   $$content   =~ s/\015\012|\012|\015/\n/g;
+   my $size = (stat($physical))[7];
 
-   $tpl->read_file($config->{'tpl_viewfile'});
+   if($config->{'max_file_size'} && $size > $config->{'max_file_size'})
+   {
+    return error($config->{'errors'}->{'file_too_large'},upper_path($virtual),{SIZE => $config->{'max_file_size'}})
+   }
+   else
+   {
+    my $content =  file_read($physical);
+    $$content   =~ s/\015\012|\012|\015/\n/g;
 
-   $tpl->fillin("FILE",$virtual);
-   $tpl->fillin("DIR",upper_path($virtual));
-   $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
-   $tpl->fillin("SCRIPT",$script);
-   $tpl->fillin("CONTENT",encode_entities($$content));
+    $tpl->read_file($config->{'templates'}->{'viewfile'});
+
+    $tpl->fillin("FILE",$virtual);
+    $tpl->fillin("DIR",upper_path($virtual));
+    $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
+    $tpl->fillin("SCRIPT",$script);
+    $tpl->fillin("CONTENT",encode_entities($$content));
+
+    $tpl->parse_if_block("editable",-r $physical && -w $physical && -T $physical && not ($config->{'max_file_size'} && $size > $config->{'max_file_size'}) && $uselist->unused($virtual));
+   }
   }
  }
 
@@ -220,9 +251,9 @@ sub exec_beginedit($$)
  my $virtual        = $data->{'virtual'};
  my $uselist        = $data->{'uselist'};
 
- return error($config->{'err_editdir'},upper_path($virtual)) if(-d $physical);
- return error_in_use($virtual) if($uselist->in_use($virtual));
- return error($config->{'err_noedit'},upper_path($virtual)) unless(-r $physical && -w $physical);
+ return error($config->{'errors'}->{'editdir'},upper_path($virtual))                   if(-d $physical);
+ return error($config->{'errors'}->{'in_use'},upper_path($virtual),{FILE => $virtual}) if($uselist->in_use($virtual));
+ return error($config->{'errors'}->{'noedit'},upper_path($virtual))                    unless(-r $physical && -w $physical);
 
  # Check on binary files
 
@@ -230,31 +261,38 @@ sub exec_beginedit($$)
  {
   # Binary file
 
-  return error($config->{'err_binary'},upper_path($virtual));
+  return error($config->{'errors'}->{'binary'},upper_path($virtual));
  }
  else
  {
-  # Text file
+  if($config->{'max_file_size'} && (stat($physical))[7] > $config->{'max_file_size'})
+  {
+   return error($config->{'errors'}->{'file_too_large'},upper_path($virtual),{SIZE => $config->{'max_file_size'}})
+  }
+  else
+   {
+   # Text file
 
-  $uselist->add_file($virtual);
-  $uselist->save;
+   $uselist->add_file($virtual);
+   $uselist->save;
 
-  my $content =  file_read($physical);
-  $$content   =~ s/\015\012|\012|\015/\n/g;
+   my $content =  file_read($physical);
+   $$content   =~ s/\015\012|\012|\015/\n/g;
 
-  my $tpl = new Template;
-  $tpl->read_file($config->{'tpl_editfile'});
+   my $tpl = new Template;
+   $tpl->read_file($config->{'templates'}->{'editfile'});
 
-  $tpl->fillin("FILE",$virtual);
-  $tpl->fillin("DIR",upper_path($virtual));
-  $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
-  $tpl->fillin("SCRIPT",$script);
-  $tpl->fillin("CONTENT",encode_entities($$content));
+   $tpl->fillin("FILE",$virtual);
+   $tpl->fillin("DIR",upper_path($virtual));
+   $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
+   $tpl->fillin("SCRIPT",$script);
+   $tpl->fillin("CONTENT",encode_entities($$content));
 
-  my $output = header(-type => "text/html");
-  $output   .= $tpl->get_template;
+   my $output = header(-type => "text/html");
+   $output   .= $tpl->get_template;
 
-  return \$output;
+   return \$output;
+  }
  }
 }
 
@@ -293,6 +331,14 @@ sub exec_endedit($$)
  my $content        = $data->{'cgi'}->param('filecontent');
  my $uselist        = $data->{'uselist'};
 
+ # We already unlock the file at the beginning of the
+ # subroutine, because if we have to abort this routine,
+ # the file keeps locked.
+ # Nobody else will access the file during this routine
+ # because of the concept of File::UseList.
+
+ file_unlock($uselist,$virtual);
+
  # Normalize newlines
 
  $content =~ s/\015\012|\012|\015/\n/g;
@@ -304,7 +350,7 @@ sub exec_endedit($$)
   $content = encode_entities($content,"\200-\377");
  }
 
- if($data->{'cgi'}->param('saveas'))
+ if($data->{'cgi'}->param('saveas') && $data->{'new_physical'} ne '' && $data->{'new_virtual'} ne '')
  {
   # Create the new filename
 
@@ -313,26 +359,22 @@ sub exec_endedit($$)
 
   # Check if someone else is editing the new file
 
-  return error_in_use($virtual) if($uselist->in_use($virtual));
+  return error($config->{'errors'}->{'in_use'},upper_path($virtual),{FILE => $virtual}) if($uselist->in_use($virtual));
  }
 
- return error($config->{'err_editdir'},upper_path($virtual)) if(-d $physical);
- return error($config->{'err_noedit'}, upper_path($virtual)) unless(-r $physical && -w $physical);
+ return error($config->{'errors'}->{'text_to_binary'},upper_path($virtual)) unless(-T $physical);
+ return error($config->{'errors'}->{'editdir'},upper_path($virtual))        if(-d $physical);
+ return error($config->{'errors'}->{'noedit'}, upper_path($virtual))        if(-e $physical && !(-r $physical && -w $physical));
 
  if(file_save($physical,\$content))
  {
   # Saving of the file was successful - so unlock it!
 
-  file_unlock($uselist,$data->{'virtual'});
-  #                    ^^^^^^^^^^^^^^^^^^
-  # Maybe the user saved the file using another filename...
-  # But we have to unlock the original file!
-
   return devedit_reload({command => 'show', file => upper_path($virtual)});
  }
  else
  {
-  return error($config->{'err_edit_failed'},upper_path($virtual),{FILE => $virtual});
+  return error($config->{'errors'}->{'edit_failed'},upper_path($virtual),{FILE => $virtual});
  }
 }
 
@@ -353,10 +395,26 @@ sub exec_mkfile($$)
  my $dir            = upper_path($new_virtual);
  $new_virtual       = encode_entities($new_virtual);
 
- return error($config->{'err_file_exists'},$dir,{FILE => $new_virtual}) if(-e $new_physical);
+ if($new_physical)
+ {
+  return error($config->{'errors'}->{'file_exists'},$dir,{FILE => $new_virtual}) if(-e $new_physical);
+
+  file_create($new_physical) or return error($config->{'errors'}->{'mkfile_failed'},$dir,{FILE => $new_virtual});
+  return devedit_reload({command => 'show', file => $dir});
+ }
+ else
+ {
+  my $tpl = new Template;
+  $tpl->read_file($config->{'templates'}->{'mkfile'});
+
+  $tpl->fillin("DIR","/");
+  $tpl->fillin("SCRIPT",$script);
+
+  my $output = header(-type => "text/html");
+  $output   .= $tpl->get_template;
 
- file_create($new_physical) or return error($config->{'err_mkfile_failed'},$dir,{FILE => $new_virtual});
- return devedit_reload({command => 'show', file => $dir});
+  return \$output;
+ }
 }
 
 # exec_mkdir()
@@ -376,10 +434,86 @@ sub exec_mkdir($$)
  my $dir            = upper_path($new_virtual);
  $new_virtual       = encode_entities($new_virtual);
 
- return error($config->{'err_file_exists'},$dir,{FILE => $new_virtual}) if(-e $new_physical);
+ return error($config->{'errors'}->{'file_exists'},$dir,{FILE => $new_virtual}) if(-e $new_physical);
+
+ if($new_physical)
+ {
+  mkdir($new_physical,0777) or return error($config->{'errors'}->{'mkdir_failed'},$dir,{DIR => $new_virtual});
+  return devedit_reload({command => 'show', file => $dir});
+ }
+ else
+ {
+  my $tpl = new Template;
+  $tpl->read_file($config->{'templates'}->{'mkdir'});
+
+  $tpl->fillin("DIR","/");
+  $tpl->fillin("SCRIPT",$script);
+
+  my $output = header(-type => "text/html");
+  $output   .= $tpl->get_template;
+
+  return \$output;
+ }
+}
+
+# exec_upload()
+#
+# Upload a file
+#
+# Params: 1. Reference to user input hash
+#         2. Reference to config hash
+#
+# Return: Output of the command (Scalar Reference)
+
+sub exec_upload($$)
+{
+ my ($data,$config) = @_;
+ my $physical       = $data->{'physical'};
+ my $virtual        = $data->{'virtual'};
+ my $cgi            = $data->{'cgi'};
+
+ if(my $uploaded_file = $cgi->param('uploaded_file'))
+ {
+  # Process file upload
+
+  my $filename  = file_name($uploaded_file);
+  my $file_phys = $physical."/".$filename;
+  my $file_virt = $virtual."".$filename;
+
+  return error($config->{'errors'}->{'file_exists'},$virtual,{FILE => $file_virt}) if(-e $file_phys && not $cgi->param('overwrite'));
+
+  my $ascii     = $cgi->param('ascii');
+  my $handle    = $cgi->upload('uploaded_file');
+
+  local *FILE;
+
+  open(FILE,">$file_phys") or return error($config->{'errors'}->{'mkfile_failed'},$virtual,{FILE => $file_virt});
+  binmode(FILE) unless($ascii);
 
- mkdir($new_physical,0777) or return error($config->{'err_mkdir_failed'},$dir,{DIR => $new_virtual});
- return devedit_reload({command => 'show', file => $dir});
+  # Read transferred file and write it to disk
+
+  read($handle, my $data, -s $handle);
+  $data =~ s/\015\012|\012|\015/\n/g if($ascii); # Replace line separators if transferring in ASCII mode
+  print FILE $data;
+
+  close(FILE);
+
+  return devedit_reload({command => "show", file => $virtual});
+ }
+ else
+ {
+  my $tpl = new Template;
+  $tpl->read_file($config->{'templates'}->{'upload'});
+
+  $tpl->fillin("DIR",$virtual);
+  $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
+  $tpl->fillin("SCRIPT",$script);
+
+  my $output = header(-type => "text/html");
+  $output   .= $tpl->get_template;
+
+  return \$output;
+ }
 }
 
 # exec_copy()
@@ -398,7 +532,8 @@ sub exec_copy($$)
  my $virtual        = encode_entities($data->{'virtual'});
  my $new_physical   = $data->{'new_physical'};
 
- return error($config->{'err_nocopy'}) unless(-r $physical);
+ return error($config->{'errors'}->{'dircopy'}) if(-d $physical);
+ return error($config->{'errors'}->{'nocopy'})  unless(-r $physical);
 
  if($new_physical)
  {
@@ -408,22 +543,23 @@ sub exec_copy($$)
 
   if(-e $new_physical)
   {
-   return error($config->{'err_exist_edited'},$dir,{FILE => $new_virtual}) if($data->{'uselist'}->in_use($data->{'new_virtual'}));
+   return error($config->{'errors'}->{'exist_edited'},$dir,{FILE => $new_virtual}) if($data->{'uselist'}->in_use($data->{'new_virtual'}));
 
    if(-d $new_physical)
    {
-    return error($config->{'err_dircopy'});
+    return error($config->{'errors'}->{'dir_replace'},$dir);
    }
    elsif(not $data->{'cgi'}->param('confirmed'))
    {
     my $tpl = new Template;
-    $tpl->read_file($config->{'tpl_confirm_replace'});
+    $tpl->read_file($config->{'templates'}->{'confirm_replace'});
 
     $tpl->fillin("FILE",$virtual);
     $tpl->fillin("NEW_FILE",$new_virtual);
     $tpl->fillin("NEW_FILENAME",file_name($new_virtual));
     $tpl->fillin("NEW_DIR",$dir);
     $tpl->fillin("DIR",upper_path($virtual));
+
     $tpl->fillin("COMMAND","copy");
     $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
     $tpl->fillin("SCRIPT",$script);
@@ -435,13 +571,13 @@ sub exec_copy($$)
    }
   }
 
-  copy($physical,$new_physical) or return error($config->{'err_copy_failed'},upper_path($virtual),{FILE => $virtual, NEW_FILE => $new_virtual});
+  copy($physical,$new_physical) or return error($config->{'errors'}->{'copy_failed'},upper_path($virtual),{FILE => $virtual, NEW_FILE => $new_virtual});
   return devedit_reload({command => 'show', file => $dir});
  }
  else
  {
   my $tpl = new Template;
-  $tpl->read_file($config->{'tpl_copyfile'});
+  $tpl->read_file($config->{'templates'}->{'copyfile'});
 
   $tpl->fillin("FILE",$virtual);
   $tpl->fillin("DIR",upper_path($virtual));
@@ -471,7 +607,8 @@ sub exec_rename($$)
  my $virtual        = $data->{'virtual'};
  my $new_physical   = $data->{'new_physical'};
 
- return error_in_use($virtual) if($data->{'uselist'}->in_use($virtual));
+ return error($config->{'errors'}->{'rename_root'},"/") if($virtual eq "/");
+ return error($config->{'errors'}->{'in_use'},upper_path($virtual),{FILE => $virtual}) if($data->{'uselist'}->in_use($virtual));
 
  if($new_physical)
  {
@@ -481,22 +618,23 @@ sub exec_rename($$)
 
   if(-e $new_physical)
   {
-   return error($config->{'err_exist_edited'},$dir,{FILE => $new_virtual}) if($data->{'uselist'}->in_use($data->{'new_virtual'}));
+   return error($config->{'errors'}->{'exist_edited'},$dir,{FILE => $new_virtual}) if($data->{'uselist'}->in_use($data->{'new_virtual'}));
 
    if(-d $new_physical)
    {
-    return error($config->{'err_dircopy'});
+    return error($config->{'errors'}->{'dir_replace'},$dir);
    }
    elsif(not $data->{'cgi'}->param('confirmed'))
    {
     my $tpl = new Template;
-    $tpl->read_file($config->{'tpl_confirm_replace'});
+    $tpl->read_file($config->{'templates'}->{'confirm_replace'});
 
     $tpl->fillin("FILE",$virtual);
     $tpl->fillin("NEW_FILE",$new_virtual);
     $tpl->fillin("NEW_FILENAME",file_name($new_virtual));
     $tpl->fillin("NEW_DIR",$dir);
     $tpl->fillin("DIR",upper_path($virtual));
+
     $tpl->fillin("COMMAND","rename");
     $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
     $tpl->fillin("SCRIPT",$script);
@@ -508,13 +646,13 @@ sub exec_rename($$)
    }
   }
 
-  rename($physical,$new_physical) or return error($config->{'err_rename_failed'},upper_path($virtual),{FILE => $virtual, NEW_FILE => $new_virtual});
+  rename($physical,$new_physical) or return error($config->{'errors'}->{'rename_failed'},upper_path($virtual),{FILE => $virtual, NEW_FILE => $new_virtual});
   return devedit_reload({command => 'show', file => $dir});
  }
  else
  {
   my $tpl = new Template;
-  $tpl->read_file($config->{'tpl_renamefile'});
+  $tpl->read_file($config->{'templates'}->{'renamefile'});
 
   $tpl->fillin("FILE",$virtual);
   $tpl->fillin("DIR",upper_path($virtual));
@@ -543,6 +681,8 @@ sub exec_remove($$)
  my $physical       = $data->{'physical'};
  my $virtual        = $data->{'virtual'};
 
+ return error($config->{'errors'}->{'remove_root'},"/") if($virtual eq "/");
+
  if(-d $physical)
  {
   # Remove a directory
@@ -555,7 +695,7 @@ sub exec_remove($$)
   else
   {
    my $tpl = new Template;
-   $tpl->read_file($config->{'tpl_confirm_rmdir'});
+   $tpl->read_file($config->{'templates'}->{'confirm_rmdir'});
 
    $tpl->fillin("DIR",$virtual);
    $tpl->fillin("UPPER_DIR",upper_path($virtual));
@@ -572,17 +712,17 @@ sub exec_remove($$)
  {
   # Remove a file
 
-  return error_in_use($virtual) if($data->{'uselist'}->in_use($virtual));
+  return error($config->{'errors'}->{'in_use'},upper_path($virtual),{FILE => $virtual}) if($data->{'uselist'}->in_use($virtual));
 
   if($data->{'cgi'}->param('confirmed'))
   {
-   unlink($physical) or return error($config->{'err_delete_failed'},upper_path($virtual),{FILE => $virtual});
+   unlink($physical) or return error($config->{'errors'}->{'delete_failed'},upper_path($virtual),{FILE => $virtual});
    return devedit_reload({command => 'show', file => upper_path($virtual)});
   }
   else
   {
    my $tpl = new Template;
-   $tpl->read_file($config->{'tpl_confirm_rmfile'});
+   $tpl->read_file($config->{'templates'}->{'confirm_rmfile'});
 
    $tpl->fillin("FILE",$virtual);
    $tpl->fillin("DIR",upper_path($virtual));
@@ -597,6 +737,83 @@ sub exec_remove($$)
  }
 }
 
+# exec_chprop()
+#
+# Change the mode and the group of a file or a directory
+#
+# Params: 1. Reference to user input hash
+#         2. Reference to config hash
+#
+# Return: Output of the command (Scalar Reference)
+
+sub exec_chprop($$)
+{
+ my ($data,$config) = @_;
+ my $physical       = $data->{'physical'};
+ my $virtual        = $data->{'virtual'};
+ my $dir            = upper_path($virtual);
+ my $cgi            = $data->{'cgi'};
+ my $mode           = $cgi->param('mode');
+ my $group          = $cgi->param('group');
+
+ if($users)
+ {
+  if(-o $physical)
+  {
+   if($mode || $group)
+   {
+    if($mode)
+    {
+     my $oct_mode = $mode;
+     $oct_mode    = "0".$oct_mode if(length($oct_mode) == 3);
+     $oct_mode    = oct($oct_mode);
+
+     chmod($oct_mode,$physical);
+    }
+
+    chgrp($group,$physical) if($group);
+
+    return devedit_reload({command => 'show', file => $dir});
+   }
+   else
+   {
+    my @stat     = stat($physical);
+
+    my $mode     = $stat[2];
+    my $mode_oct = substr(sprintf("%04o",$mode),-4);
+    my $gid      = $stat[5];
+    my $group    = getgrgid($gid);
+
+    my $tpl = new Template;
+    $tpl->read_file($config->{'templates'}->{'chprop'});
+
+    $tpl->fillin("MODE_OCTAL",$mode_oct);
+    $tpl->fillin("MODE_STRING",mode_string($mode));
+    $tpl->fillin("GID",$gid);
+    $tpl->fillin("GROUP",$group);
+
+    $tpl->fillin("FILE",$virtual);
+    $tpl->fillin("DIR",$dir);
+    $tpl->fillin("URL",equal_url($config->{'httproot'},$virtual));
+    $tpl->fillin("SCRIPT",$script);
+
+    my $output = header(-type => "text/html");
+    $output   .= $tpl->get_template;
+
+    return \$output;
+   }
+  }
+  else
+  {
+   return error($config->{'errors'}->{'not_owner'},$dir,{FILE => $virtual});
+  }
+ }
+ else
+ {
+  return error($config->{'errors'}->{'no_users'},$dir,{FILE => $virtual});
+ }
+}
+
 # exec_unlock()
 #
 # Remove a file from the list of used files and
@@ -611,16 +828,19 @@ sub exec_unlock($$)
 {
  my ($data,$config) = @_;
  my $virtual        = $data->{'virtual'};
+ my $uselist        = $data->{'uselist'};
+
+ return devedit_reload({command => 'show', file => upper_path($virtual)}) if($uselist->unused($virtual));
 
  if($data->{'cgi'}->param('confirmed'))
  {
-  file_unlock($data->{'uselist'},$virtual);
+  file_unlock($uselist,$virtual);
   return devedit_reload({command => 'show', file => upper_path($virtual)});
  }
  else
  {
   my $tpl = new Template;
-  $tpl->read_file($config->{'tpl_confirm_unlock'});
+  $tpl->read_file($config->{'templates'}->{'confirm_unlock'});
 
   $tpl->fillin("FILE",$virtual);
   $tpl->fillin("DIR",upper_path($virtual));
@@ -634,6 +854,80 @@ sub exec_unlock($$)
  }
 }
 
+# exec_about()
+#
+# Display some information about Dev-Editor
+#
+# Params: 1. Reference to user input hash
+#         2. Reference to config hash
+#
+# Return: Output of the command (Scalar Reference)
+
+sub exec_about($$)
+{
+ my ($data,$config) = @_;
+
+ my $tpl = new Template;
+ $tpl->read_file($config->{'templates'}->{'about'});
+
+ $tpl->fillin("SCRIPT",$script);
+
+ # Dev-Editor's version number
+
+ $tpl->fillin("VERSION",$data->{'version'});
+
+ # Some path information
+
+ $tpl->fillin("SCRIPT_PHYS",$ENV{'SCRIPT_FILENAME'});
+ $tpl->fillin("CONFIG_PATH",$data->{'configfile'});
+ $tpl->fillin("FILE_ROOT",$config->{'fileroot'});
+ $tpl->fillin("HTTP_ROOT",$config->{'httproot'});
+
+ # Perl
+
+ $tpl->fillin("PERL_PROG",$^X);
+ $tpl->fillin("PERL_VER",sprintf("%vd",$^V));
+
+ # Information about the server
+
+ $tpl->fillin("HTTPD",$ENV{'SERVER_SOFTWARE'});
+ $tpl->fillin("OS",$^O);
+ $tpl->fillin("TIME",strftime($config->{'timeformat'},localtime));
+
+ # Process information
+
+ $tpl->fillin("PID",$$);
+
+ # Check if the functions getpwuid() and getgrgid() are available
+
+ if($users)
+ {
+  # Dev-Editor is running on a system which allows users and groups
+  # So we display the user and the group of our process
+
+  $tpl->parse_if_block("users",1);
+
+  # ID's of user and group
+
+  $tpl->fillin("UID",$<);
+  $tpl->fillin("GID",$();
+
+  # Names of user and group
+
+  $tpl->fillin("USER",getpwuid($<));
+  $tpl->fillin("GROUP",getgrgid($());
+ }
+ else
+ {
+  $tpl->parse_if_block("users",0);
+ }
+
+ my $output = header(-type => "text/html");
+ $output   .= $tpl->get_template;
+
+ return \$output;
+}
+
 # it's true, baby ;-)
 
 1;