X-Git-Url: https://git.p6c8.net/devedit.git/blobdiff_plain/9229d49c57fb972c6058c98b94cfdb86feca2bd2..7526dfcc57f8e86a90878078eacaf729072db49a:/modules/Command.pm

diff --git a/modules/Command.pm b/modules/Command.pm
index 4cea462..9e11f16 100644
--- a/modules/Command.pm
+++ b/modules/Command.pm
@@ -6,17 +6,19 @@ package Command;
 # Execute Dev-Editor's commands
 #
 # Author:        Patrick Canterino <patrick@patshaping.de>
-# Last modified: 2005-01-24
+# Last modified: 2005-04-15
 #
 
 use strict;
 
 use vars qw(@EXPORT);
 
+use Fcntl;
 use File::Access;
 use File::Copy;
 use File::Path;
 
+use Digest::MD5 qw(md5_hex);
 use POSIX qw(strftime);
 use Tool;
 
@@ -32,7 +34,6 @@ my $users  = eval('getpwuid(0)') && eval('getgrgid(0)');
 
 my %dispatch = ('show'       => \&exec_show,
                 'beginedit'  => \&exec_beginedit,
-                'canceledit' => \&exec_canceledit,
                 'endedit'    => \&exec_endedit,
                 'mkdir'      => \&exec_mkdir,
                 'mkfile'     => \&exec_mkfile,
@@ -41,7 +42,6 @@ my %dispatch = ('show'       => \&exec_show,
                 'rename'     => \&exec_rename,
                 'remove'     => \&exec_remove,
                 'chprop'     => \&exec_chprop,
-                'unlock'     => \&exec_unlock,
                 'about'      => \&exec_about
                );
 
@@ -74,7 +74,7 @@ sub exec_command($$$)
   }
  }
 
- return error($config->{'errors'}->{'cmd_unknown'},'/',{COMMAND => encode_entities($command)});
+ return error($config->{'errors'}->{'command_unknown'},'/',{COMMAND => encode_entities($command)});
 }
 
 # exec_show()
@@ -92,31 +92,28 @@ sub exec_show($$)
  my $physical       = $data->{'physical'};
  my $virtual        = $data->{'virtual'};
  my $upper_path     = encode_entities(upper_path($virtual));
- my $uselist        = $data->{'uselist'};
 
  my $tpl = new Template;
 
- if(-d $physical)
+ if(-d $physical && not -l $physical)
  {
   # Create directory listing
 
   return error($config->{'errors'}->{'no_dir_access'},$upper_path) unless(-r $physical && -x $physical);
 
   my $direntries = dir_read($physical);
-  return error($config->{'dir_read_fail'},$upper_path,{DIR => encode_entities($virtual)}) unless($direntries);
+  return error($config->{'errors'}->{'dir_read_fail'},$upper_path,{DIR => encode_entities($virtual)}) unless($direntries);
 
   my $files = $direntries->{'files'};
   my $dirs  = $direntries->{'dirs'};
 
-  my $dir_writeable = -w $physical;
-
   my $dirlist = '';
 
   my $filter1 = $data->{'cgi'}->param('filter') || '*';        # The real wildcard
   my $filter2 = ($filter1 && $filter1 ne '*') ? $filter1 : ''; # Wildcard for output
 
   # Create the link to the upper directory
-  # (only if we are not in the root directory)
+  # (only if the current directory is not the root directory)
 
   unless($virtual eq '/')
   {
@@ -165,8 +162,7 @@ sub exec_show($$)
    my $phys_path = $physical.'/'.$file;
    my $virt_path = encode_entities($virtual.$file);
 
-   my @stat      = stat($phys_path);
-   my $in_use    = $uselist->in_use($virtual.$file);
+   my @stat      = lstat($phys_path);
    my $too_large = $config->{'max_file_size'} && $stat[7] > $config->{'max_file_size'};
 
    my $ftpl = new Template;
@@ -178,15 +174,14 @@ sub exec_show($$)
    $ftpl->fillin('DATE',encode_entities(strftime($config->{'timeformat'},($config->{'use_gmt'}) ? gmtime($stat[9]) : localtime($stat[9]))));
    $ftpl->fillin('URL',equal_url(encode_entities($config->{'httproot'}),$virt_path));
 
+   $ftpl->parse_if_block('link',-l $phys_path);
+   $ftpl->parse_if_block('no_link',not -l $phys_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 && not $too_large);
-   $ftpl->parse_if_block('editable',(-r $phys_path && -w $phys_path && -T $phys_path && not $too_large) && not $in_use);
-
-   $ftpl->parse_if_block('in_use',$in_use);
-   $ftpl->parse_if_block('unused',not $in_use);
+   $ftpl->parse_if_block('viewable',(-r $phys_path && -T $phys_path && not $too_large) || -l $phys_path);
+   $ftpl->parse_if_block('editable',(-r $phys_path && -w $phys_path && -T $phys_path && not $too_large) && not -l $phys_path);
 
    $ftpl->parse_if_block('too_large',$config->{'max_file_size'} && $stat[7] > $config->{'max_file_size'});
 
@@ -205,10 +200,26 @@ sub exec_show($$)
   $tpl->fillin('FILTER',encode_entities($filter2));
   $tpl->fillin('FILTER_URL',escape($filter2));
 
-  $tpl->parse_if_block('dir_writeable',$dir_writeable);
+  $tpl->parse_if_block('empty',$dirlist eq '');
+  $tpl->parse_if_block('dir_writeable',-w $physical);
   $tpl->parse_if_block('filter',$filter2);
   $tpl->parse_if_block('gmt',$config->{'use_gmt'});
  }
+ elsif(-l $physical)
+ {
+  # Show the target of a symbolic link
+
+  my $link_target = readlink($physical);
+
+  $tpl->read_file($config->{'templates'}->{'viewlink'});
+
+  $tpl->fillin('FILE',encode_entities($virtual));
+  $tpl->fillin('DIR',$upper_path);
+  $tpl->fillin('URL',encode_entities(equal_url($config->{'httproot'},$virtual)));
+  $tpl->fillin('SCRIPT',$script);
+
+  $tpl->fillin('LINK_TARGET',encode_entities($link_target));
+ }
  else
  {
   # View a file
@@ -219,7 +230,7 @@ sub exec_show($$)
   # We have to do it in this way or empty files will be recognized
   # as binary files
 
-  return error($config->{'errors'}->{'binary'},$upper_path) unless(-T $physical);
+  return error($config->{'errors'}->{'binary_file'},$upper_path) unless(-T $physical);
 
   # Is the file too large?
 
@@ -237,7 +248,7 @@ sub exec_show($$)
   $tpl->fillin('URL',encode_entities(equal_url($config->{'httproot'},$virtual)));
   $tpl->fillin('SCRIPT',$script);
 
-  $tpl->parse_if_block('editable',-w $physical && $uselist->unused($virtual));
+  $tpl->parse_if_block('editable',-w $physical);
 
   $tpl->fillin('CONTENT',encode_entities($$content));
  }
@@ -263,28 +274,24 @@ sub exec_beginedit($$)
  my $physical       = $data->{'physical'};
  my $virtual        = $data->{'virtual'};
  my $dir            = upper_path($virtual);
- my $uselist        = $data->{'uselist'};
+ my $cgi            = $data->{'cgi'};
 
- return error($config->{'errors'}->{'editdir'},$dir)                    if(-d $physical);
- return error($config->{'errors'}->{'in_use'}, $dir,{FILE => $virtual}) if($uselist->in_use($virtual));
- return error($config->{'errors'}->{'no_edit'},$dir)                    unless(-r $physical && -w $physical);
+ return error($config->{'errors'}->{'link_edit'},$dir) if(-l $physical);
+ return error($config->{'errors'}->{'dir_edit'}, $dir) if(-d $physical);
+ return error($config->{'errors'}->{'no_edit'},  $dir) unless(-r $physical && -w $physical);
 
  # Check on binary files
 
- return error($config->{'errors'}->{'binary'},$dir) unless(-T $physical);
+ return error($config->{'errors'}->{'binary_file'},$dir) unless(-T $physical);
 
  # Is the file too large?
 
  return error($config->{'errors'}->{'file_too_large'},$dir,{SIZE => $config->{'max_file_size'}}) if($config->{'max_file_size'} && -s $physical > $config->{'max_file_size'});
 
- # Lock the file...
-
- $uselist->add_file($virtual);
- $uselist->save;
-
  # ... and show the editing form
 
  my $content =  file_read($physical);
+ my $md5sum  =  md5_hex($$content);
  $$content   =~ s/\015\012|\012|\015/\n/g;
 
  my $tpl = new Template;
@@ -294,32 +301,17 @@ sub exec_beginedit($$)
  $tpl->fillin('DIR',$dir);
  $tpl->fillin('URL',equal_url($config->{'httproot'},$virtual));
  $tpl->fillin('SCRIPT',$script);
+ $tpl->fillin('MD5SUM',$md5sum);
  $tpl->fillin('CONTENT',encode_entities($$content));
 
+ $tpl->parse_if_block('error',0);
+
  my $output = header(-type => 'text/html');
  $output   .= $tpl->get_template;
 
  return \$output;
 }
 
-# exec_canceledit()
-#
-# Abort file editing
-#
-# Params: 1. Reference to user input hash
-#         2. Reference to config hash
-#
-# Return: Output of the command (Scalar Reference)
-
-sub exec_canceledit($$)
-{
- my ($data,$config) = @_;
- my $virtual        = $data->{'virtual'};
-
- file_unlock($data->{'uselist'},$virtual);
- return devedit_reload({command => 'show', file => upper_path($virtual)});
-}
-
 # exec_endedit()
 #
 # Save a file, unlock it and return to directory view
@@ -335,53 +327,86 @@ sub exec_endedit($$)
  my $physical       = $data->{'physical'};
  my $virtual        = $data->{'virtual'};
  my $dir            = upper_path($virtual);
- my $content        = $data->{'cgi'}->param('filecontent');
- my $uselist        = $data->{'uselist'};
+ my $cgi            = $data->{'cgi'};
+ my $content        = $cgi->param('filecontent');
+ my $md5sum         = $cgi->param('md5sum');
+ my $output;
 
- # We already unlock the file at the beginning of the subroutine,
- # because if we have to abort this routine, the file keeps locked.
- # No other user of Dev-Editor will access the file during this
- # routine because of the concept of File::UseList.
+ if(defined $content && $md5sum)
+ {
+  # Normalize newlines
 
- file_unlock($uselist,$virtual);
+  $content =~ s/\015\012|\012|\015/\n/g;
 
- # Normalize newlines
+  if($cgi->param('saveas') && $data->{'new_physical'} ne '' && $data->{'new_virtual'} ne '')
+  {
+   # Create the new filename
 
- $content =~ s/\015\012|\012|\015/\n/g;
+   $physical = $data->{'new_physical'};
+   $virtual  = $data->{'new_virtual'};
+  }
 
- if($data->{'cgi'}->param('encode_iso'))
- {
-  # Encode all ISO-8859-1 special chars
+  return error($config->{'errors'}->{'link_edit'},$dir)      if(-l $physical);
+  return error($config->{'errors'}->{'dir_edit'},$dir)       if(-d $physical);
+  return error($config->{'errors'}->{'no_edit'},$dir)        if(-e $physical && !(-r $physical && -w $physical));
+  return error($config->{'errors'}->{'text_to_binary'},$dir) if(-e $physical && not -T $physical);
 
-  $content = encode_entities($content,"\200-\377");
- }
+  # For technical reasons, we can't use file_save() for
+  # saving the file...
 
- if($data->{'cgi'}->param('saveas') && $data->{'new_physical'} ne '' && $data->{'new_virtual'} ne '')
- {
-  # Create the new filename
+  local *FILE;
 
-  $physical = $data->{'new_physical'};
-  $virtual  = $data->{'new_virtual'};
+  sysopen(FILE,$physical,O_RDWR | O_CREAT) or return error($config->{'errors'}->{'edit_failed'},$dir,{FILE => $virtual});
+  file_lock(*FILE,LOCK_EX)                 or do { close(FILE); return error($config->{'errors'}->{'edit_failed'},$dir,{FILE => $virtual}) };
 
-  # Check if someone else is editing the new file
+  my $md5 = new Digest::MD5;
+  $md5->addfile(*FILE);
 
-  return error($config->{'errors'}->{'in_use'},$dir,{FILE => $virtual}) if($uselist->in_use($virtual));
- }
+  my $md5file = $md5->hexdigest;
+  my $md5data = md5_hex($content);
 
- return error($config->{'errors'}->{'editdir'},$dir)        if(-d $physical);
- return error($config->{'errors'}->{'no_edit'},$dir)        if(-e $physical && !(-r $physical && -w $physical));
- return error($config->{'errors'}->{'text_to_binary'},$dir) unless(-T $physical);
+  if($md5file ne $md5sum && $md5data ne $md5file && not $cgi->param('saveas'))
+  {
+   # The file changed meanwhile
 
- if(file_save($physical,\$content))
- {
-  # Saving of the file was successful!
+   my $tpl = new Template;
+   $tpl->read_file($config->{'templates'}->{'editfile'});
 
-  return devedit_reload({command => 'show', file => $dir});
- }
- else
- {
-  return error($config->{'errors'}->{'edit_failed'},$dir,{FILE => $virtual});
+   $tpl->fillin('ERROR',$config->{'errors'}->{'edit_file_changed'});
+
+   $tpl->fillin('FILE',$virtual);
+   $tpl->fillin('DIR',$dir);
+   $tpl->fillin('URL',equal_url($config->{'httproot'},$virtual));
+   $tpl->fillin('SCRIPT',$script);
+   $tpl->fillin('MD5SUM',$md5file);
+   $tpl->fillin('CONTENT',encode_entities($content));
+
+   $tpl->parse_if_block('error',1);
+
+   my $data = header(-type => 'text/html');
+   $data   .= $tpl->get_template;
+
+   $output  = \$data;
+  }
+  else
+  {
+   if($md5data ne $md5file)
+   {
+    seek(FILE,0,0);
+    truncate(FILE,0);
+
+    print FILE $content;
+   }
+
+   $output = devedit_reload({command => 'show', file => $dir});
+  }
+
+  close(FILE);
+
+  return $output;
  }
+
+ return devedit_reload({command => 'beginedit', file => $virtual});
 }
 
 # exec_mkfile()
@@ -464,7 +489,7 @@ sub exec_mkdir($$)
 
 # exec_upload()
 #
-# Upload a file
+# Process a file upload
 #
 # Params: 1. Reference to user input hash
 #         2. Reference to config hash
@@ -478,7 +503,7 @@ sub exec_upload($$)
  my $virtual        = $data->{'virtual'};
  my $cgi            = $data->{'cgi'};
 
- return error($config->{'errors'}->{'no_directory'},upper_path($virtual),{FILE => $virtual}) unless(-d $physical);
+ return error($config->{'errors'}->{'no_directory'},upper_path($virtual),{FILE => $virtual}) unless(-d $physical && not -l $physical);
  return error($config->{'errors'}->{'dir_no_create'},$virtual,{DIR => $virtual})             unless(-w $physical);
 
  if(my $uploaded_file = $cgi->param('uploaded_file'))
@@ -489,17 +514,16 @@ sub exec_upload($$)
   my $file_phys = $physical.'/'.$filename;
   my $file_virt = $virtual.$filename;
 
-  return error($config->{'errors'}->{'in_use'},$virtual,{FILE => $file_virt}) if($data->{'uselist'}->in_use($file_virt));
-
   if(-e $file_phys)
   {
+   return error($config->{'errors'}->{'link_replace'},$virtual)                        if(-l $file_phys);
    return error($config->{'errors'}->{'dir_replace'},$virtual)                         if(-d $file_phys);
    return error($config->{'errors'}->{'exist_no_write'},$virtual,{FILE => $file_virt}) unless(-w $file_phys);
    return error($config->{'errors'}->{'file_exists'},$virtual,{FILE => $file_virt})    unless($cgi->param('overwrite'));
   }
 
-  my $ascii     = $cgi->param('ascii');
-  my $handle    = $cgi->upload('uploaded_file');
+  my $ascii  = $cgi->param('ascii');
+  my $handle = $cgi->upload('uploaded_file');
 
   return error($config->{'errors'}->{'invalid_upload'},$virtual) unless($handle);
 
@@ -544,8 +568,9 @@ sub exec_copy($$)
  my $dir            = upper_path($virtual);
  my $new_physical   = $data->{'new_physical'};
 
- return error($config->{'errors'}->{'dircopy'},$dir) if(-d $physical);
- return error($config->{'errors'}->{'no_copy'},$dir) unless(-r $physical);
+ return error($config->{'errors'}->{'link_copy'},$dir) if(-l $physical);
+ return error($config->{'errors'}->{'dir_copy'},$dir)  if(-d $physical);
+ return error($config->{'errors'}->{'no_copy'},$dir)   unless(-r $physical);
 
  if($new_physical)
  {
@@ -555,7 +580,7 @@ sub exec_copy($$)
 
   if(-e $new_physical)
   {
-   return error($config->{'errors'}->{'exist_edited'},$new_dir,{FILE => $new_virtual})   if($data->{'uselist'}->in_use($data->{'new_virtual'}));
+   return error($config->{'errors'}->{'link_replace'},$new_dir)                          if(-l $new_physical);
    return error($config->{'errors'}->{'dir_replace'},$new_dir)                           if(-d $new_physical);
    return error($config->{'errors'}->{'exist_no_write'},$new_dir,{FILE => $new_virtual}) unless(-w $new_physical);
 
@@ -618,9 +643,8 @@ sub exec_rename($$)
  my $dir            = upper_path($virtual);
  my $new_physical   = $data->{'new_physical'};
 
- return error($config->{'errors'}->{'rename_root'},'/')                if($virtual eq '/');
- return error($config->{'errors'}->{'no_rename'},$dir)                 unless(-w upper_path($physical));
- return error($config->{'errors'}->{'in_use'},$dir,{FILE => $virtual}) if($data->{'uselist'}->in_use($virtual));
+ return error($config->{'errors'}->{'rename_root'},'/') if($virtual eq '/');
+ return error($config->{'errors'}->{'no_rename'},$dir)  unless(-w upper_path($physical));
 
  if($new_physical)
  {
@@ -630,8 +654,7 @@ sub exec_rename($$)
 
   if(-e $new_physical)
   {
-   return error($config->{'errors'}->{'exist_edited'},$new_dir,{FILE => $new_virtual})   if($data->{'uselist'}->in_use($data->{'new_virtual'}));
-   return error($config->{'errors'}->{'dir_replace'},$new_dir)                           if(-d $new_physical);
+   return error($config->{'errors'}->{'dir_replace'},$new_dir)                           if(-d $new_physical && not -l $new_physical);
    return error($config->{'errors'}->{'exist_no_write'},$new_dir,{FILE => $new_virtual}) unless(-w $new_physical);
 
    if(not $data->{'cgi'}->param('confirmed'))
@@ -656,7 +679,7 @@ sub exec_rename($$)
    }
   }
 
-  rename($physical,$new_physical) or return error($config->{'errors'}->{'rename_failed'},$dir,{FILE => $virtual, NEW_FILE => $new_virtual});
+  move($physical,$new_physical) or return error($config->{'errors'}->{'rename_failed'},$dir,{FILE => $virtual, NEW_FILE => $new_virtual});
   return devedit_reload({command => 'show', file => $new_dir});
  }
  else
@@ -695,7 +718,7 @@ sub exec_remove($$)
  return error($config->{'errors'}->{'remove_root'},'/') if($virtual eq '/');
  return error($config->{'errors'}->{'no_delete'},$dir)  unless(-w upper_path($physical));
 
- if(-d $physical)
+ if(-d $physical && not -l $physical)
  {
   # Remove a directory
 
@@ -724,8 +747,6 @@ sub exec_remove($$)
  {
   # Remove a file
 
-  return error($config->{'errors'}->{'in_use'},$dir,{FILE => $virtual}) if($data->{'uselist'}->in_use($virtual));
-
   if($data->{'cgi'}->param('confirmed'))
   {
    unlink($physical) or return error($config->{'errors'}->{'delete_failed'},$dir,{FILE => $virtual});
@@ -768,7 +789,7 @@ sub exec_chprop($$)
  return error($config->{'errors'}->{'no_users'},$dir,{FILE => $virtual})  unless($users);
  return error($config->{'errors'}->{'chprop_root'},'/')                   if($virtual eq '/');
  return error($config->{'errors'}->{'not_owner'},$dir,{FILE => $virtual}) unless(-o $physical);
- return error($config->{'errors'}->{'in_use'},$dir,{FILE => $virtual})    if($data->{'uselist'}->in_use($virtual));
+ return error($config->{'errors'}->{'chprop_link'},$dir)                  if(-l $physical);
 
  my $cgi   = $data->{'cgi'};
  my $mode  = $cgi->param('mode');
@@ -834,47 +855,6 @@ sub exec_chprop($$)
  }
 }
 
-# exec_unlock()
-#
-# Remove a file from the list of used files and
-# return to directory view
-#
-# Params: 1. Reference to user input hash
-#         2. Reference to config hash
-#
-# Return: Output of the command (Scalar Reference)
-
-sub exec_unlock($$)
-{
- my ($data,$config) = @_;
- my $virtual        = $data->{'virtual'};
- my $uselist        = $data->{'uselist'};
- my $dir            = upper_path($virtual);
-
- return devedit_reload({command => 'show', file => $dir}) if($uselist->unused($virtual));
-
- if($data->{'cgi'}->param('confirmed'))
- {
-  file_unlock($uselist,$virtual);
-  return devedit_reload({command => 'show', file => $dir});
- }
- else
- {
-  my $tpl = new Template;
-  $tpl->read_file($config->{'templates'}->{'confirm_unlock'});
-
-  $tpl->fillin('FILE',$virtual);
-  $tpl->fillin('DIR',$dir);
-  $tpl->fillin('URL',equal_url($config->{'httproot'},$virtual));
-  $tpl->fillin('SCRIPT',$script);
-
-  my $output = header(-type => 'text/html');
-  $output   .= $tpl->get_template;
-
-  return \$output;
- }
-}
-
 # exec_about()
 #
 # Display some information about Dev-Editor
@@ -921,7 +901,8 @@ sub exec_about($$)
 
  $tpl->fillin('PID',$$);
 
- # Check if the functions getpwuid() and getgrgid() are available
+ # The following information is only available on systems supporting
+ # users and groups
 
  if($users)
  {