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<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * File::CSV
 *
 * PHP versions 4 and 5
 *
 * Copyright (c) 1997-2008,
 * Vincent Blavet <vincent@phpconcept.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category  File_Formats
 * @package   Archive_Tar
 * @author    Vincent Blavet <vincent@phpconcept.net>
 * @copyright 1997-2010 The Authors
 * @license   http://www.opensource.org/licenses/bsd-license.php New BSD License
 * @version   CVS: $Id: Tar.php 324840 2012-04-05 08:44:41Z mrook $
 * @link      http://pear.php.net/package/Archive_Tar
 */

define('ARCHIVE_TAR_ATT_SEPARATOR', 90001);
define('ARCHIVE_TAR_END_BLOCK', pack("a512", ''));

/**
* Creates a (compressed) Tar archive
*
* @package Archive_Tar
* @author  Vincent Blavet <vincent@phpconcept.net>
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @version $Revision: 324840 $
*/
class softtar
{
    /**
    * @var string Name of the Tar
    */
    var $_tarname='';
	
	/**
    * @var string In case of FTP / Dropbox / etc, we will write locally and after hitting 10MB upload it
    */
	var $_local_tar=''; // The local file	
	var $_orig_tar=''; // The remote file
	var $remote_fp=''; // The remote file pointer	
	var $remote_fp_filter = NULL;
	var $remote_hctx = NULL;
	var $remote_content_size = 0;

/**
    * @var boolean if true, the Tar file will be gzipped
    */
    var $_compress=false;

/**
    * @var string Type of compression : 'none', 'gz' or 'bz2'
    */
    var $_compress_type='none';

/**
    * @var string Explode separator
    */
    var $_separator=',';

/**
    * @var file descriptor
    */
    var $_file=0;

/**
    * @var string Local Tar name of a remote Tar (http:// or ftp://)
    */
    var $_temp_tarname='';

/**
    * @var string regular expression for ignoring files or directories
    */
    var $_ignore_regexp='';

/**
     * @var object PEAR_Error object
     */
    var $error_object=null;

function softtar($p_tarname, $p_compress = null, $handle_remote = false){
		return $this->__construct($p_tarname, $p_compress, $handle_remote);
	}

// {{{ constructor
    /**
    * Archive_Tar Class constructor. This flavour of the constructor only
    * declare a new Archive_Tar object, identifying it by the name of the
    * tar file.
    * If the compress argument is set the tar will be read or created as a
    * gzip or bz2 compressed TAR file.
    *
    * @param string $p_tarname  The name of the tar archive to create
    * @param string $p_compress can be null, 'gz' or 'bz2'. This
    *               parameter indicates if gzip or bz2 compression
    *               is required.  For compatibility reason the
    *               boolean value 'true' means 'gz'.
    *
    * @access public
    */
    function __construct($p_tarname, $p_compress = null, $handle_remote = false)
    {
		
		// $tmpdir is mainly used for REMOTE protocols so that we can write locally and append on the remote server
		if(preg_match('/\:\/\//', $p_tarname) && $handle_remote){			
			$tmpdir = $GLOBALS['user']['backup_dir'].'/tmp';
			$this->_orig_tar = $p_tarname;
			$p_tarname = $tmpdir.'/'.md5($p_tarname);
			$this->_local_tar = $p_tarname;
		}
		
        $this->_compress = false;
        $this->_compress_type = 'none';
        if (($p_compress === null) || ($p_compress == '')) {
            if (@file_exists($p_tarname)) {
                if ($fp = @fopen($p_tarname, "rb")) {
                    // look for gzip magic cookie
                    $data = fread($fp, 2);
                    fclose($fp);
                    if ($data == "\37\213") {
                        $this->_compress = true;
                        $this->_compress_type = 'gz';
                        // No sure it's enought for a magic code ....
                    } elseif ($data == "BZ") {
                        $this->_compress = true;
                        $this->_compress_type = 'bz2';
                    }
                }
            } else {
                // probably a remote file or some file accessible
                // through a stream interface
                if (substr($p_tarname, -2) == 'gz') {
                    $this->_compress = true;
                    $this->_compress_type = 'gz';
                } elseif ((substr($p_tarname, -3) == 'bz2') ||
                          (substr($p_tarname, -2) == 'bz')) {
                    $this->_compress = true;
                    $this->_compress_type = 'bz2';
                }
            }
        } else {
            if (($p_compress === true) || ($p_compress == 'gz')) {
                $this->_compress = true;
                $this->_compress_type = 'gz';
            } else if ($p_compress == 'bz2') {
                $this->_compress = true;
                $this->_compress_type = 'bz2';
            } else {
                $this->_error("Unsupported compression type '$p_compress'\n".
                    "Supported types are 'gz' and 'bz2'.\n");
                return false;
            }
        }
        $this->_tarname = $p_tarname;
        if ($this->_compress) { // assert zlib or bz2 extension support
            if ($this->_compress_type == 'gz')
                $extname = 'zlib';
            else if ($this->_compress_type == 'bz2')
                $extname = 'bz2';

if (!extension_loaded($extname)) {
                PEAR::loadExtension($extname);
            }
            if (!extension_loaded($extname)) {
                $this->_error("The extension '$extname' couldn't be found.\n".
                    "Please make sure your version of PHP was built ".
                    "with '$extname' support.\n");
                return false;
            }
        }
    }
    // }}}

// {{{ destructor
    function _softtar()
    {
        $this->_close();
        // ----- Look for a local copy to delete
        if ($this->_temp_tarname != '')
            @unlink($this->_temp_tarname);
		
		// In case of REMOTE
		if(!empty($this->_orig_tar)){
			unlink($this->_local_tar);
		}
		
    }
    // }}}
	
	function __destruct(){
		$this->_softtar();
	}

// {{{ create()
    /**
    * This method creates the archive file and add the files / directories
    * that are listed in $p_filelist.
    * If a file with the same name exist and is writable, it is replaced
    * by the new tar.
    * The method return false and a PEAR error text.
    * The $p_filelist parameter can be an array of string, each string
    * representing a filename or a directory name with their path if
    * needed. It can also be a single string with names separated by a
    * single blank.
    * For each directory added in the archive, the files and
    * sub-directories are also added.
    * See also createModify() method for more details.
    *
    * @param array $p_filelist An array of filenames and directory names, or a
    *              single string with names separated by a single
    *              blank space.
    *
    * @return true on success, false on error.
    * @see    createModify()
    * @access public
    */
    function create($p_filelist)
    {
        return $this->createModify($p_filelist, '', '');
    }
    // }}}

// {{{ add()
    /**
    * This method add the files / directories that are listed in $p_filelist in
    * the archive. If the archive does not exist it is created.
    * The method return false and a PEAR error text.
    * The files and directories listed are only added at the end of the archive,
    * even if a file with the same name is already archived.
    * See also createModify() method for more details.
    *
    * @param array $p_filelist An array of filenames and directory names, or a
    *              single string with names separated by a single
    *              blank space.
    *
    * @return true on success, false on error.
    * @see    createModify()
    * @access public
    */
    function add($p_filelist)
    {
        return $this->addModify($p_filelist, '', '');
    }
    // }}}

// {{{ extract()
    function extract($p_path='', $p_preserve=false)
    {
        return $this->extractModify($p_path, '', $p_preserve);
    }
    // }}}

// {{{ listContent()
    function listContent()
    {
        $v_list_detail = array();

if ($this->_openRead()) {
            if (!$this->_extractList('', $v_list_detail, "list", '', '')) {
                unset($v_list_detail);
                $v_list_detail = 0;
            }
            $this->_close();
        }

return $v_list_detail;
    }
    // }}}

// {{{ createModify()
    /**
    * This method creates the archive file and add the files / directories
    * that are listed in $p_filelist.
    * If the file already exists and is writable, it is replaced by the
    * new tar. It is a create and not an add. If the file exists and is
    * read-only or is a directory it is not replaced. The method return
    * false and a PEAR error text.
    * The $p_filelist parameter can be an array of string, each string
    * representing a filename or a directory name with their path if
    * needed. It can also be a single string with names separated by a
    * single blank.
    * The path indicated in $p_remove_dir will be removed from the
    * memorized path of each file / directory listed when this path
    * exists. By default nothing is removed (empty path '')
    * The path indicated in $p_add_dir will be added at the beginning of
    * the memorized path of each file / directory listed. However it can
    * be set to empty ''. The adding of a path is done after the removing
    * of path.
    * The path add/remove ability enables the user to prepare an archive
    * for extraction in a different path than the origin files are.
    * See also addModify() method for file adding properties.
    *
    * @param array  $p_filelist   An array of filenames and directory names,
    *                             or a single string with names separated by
    *                             a single blank space.
    * @param string $p_add_dir    A string which contains a path to be added
    *                             to the memorized path of each element in
    *                             the list.
    * @param string $p_remove_dir A string which contains a path to be
    *                             removed from the memorized path of each
    *                             element in the list, when relevant.
    *
    * @return boolean true on success, false on error.
    * @access public
    * @see addModify()
    */
    function createModify($p_filelist, $p_add_dir, $p_remove_dir='')
    {
        $v_result = true;

if (!$this->_openWrite())
            return false;

if ($p_filelist != '') {
            if (is_array($p_filelist))
                $v_list = $p_filelist;
            elseif (is_string($p_filelist))
                $v_list = explode($this->_separator, $p_filelist);
            else {
                $this->_cleanFile();
                $this->_error('Invalid file list');
                return false;
            }

$v_result = $this->_addList($v_list, $p_add_dir, $p_remove_dir);
        }

if ($v_result) {
            $this->_writeFooter();
            $this->_close();
        } else
            $this->_cleanFile();

return $v_result;
    }
    // }}}

// {{{ addModify()
    /**
    * This method add the files / directories listed in $p_filelist at the
    * end of the existing archive. If the archive does not yet exists it
    * is created.
    * The $p_filelist parameter can be an array of string, each string
    * representing a filename or a directory name with their path if
    * needed. It can also be a single string with names separated by a
    * single blank.
    * The path indicated in $p_remove_dir will be removed from the
    * memorized path of each file / directory listed when this path
    * exists. By default nothing is removed (empty path '')
    * The path indicated in $p_add_dir will be added at the beginning of
    * the memorized path of each file / directory listed. However it can
    * be set to empty ''. The adding of a path is done after the removing
    * of path.
    * The path add/remove ability enables the user to prepare an archive
    * for extraction in a different path than the origin files are.
    * If a file/dir is already in the archive it will only be added at the
    * end of the archive. There is no update of the existing archived
    * file/dir. However while extracting the archive, the last file will
    * replace the first one. This results in a none optimization of the
    * archive size.
    * If a file/dir does not exist the file/dir is ignored. However an
    * error text is send to PEAR error.
    * If a file/dir is not readable the file/dir is ignored. However an
    * error text is send to PEAR error.
    *
    * @param array  $p_filelist   An array of filenames and directory
    *                             names, or a single string with names
    *                             separated by a single blank space.
    * @param string $p_add_dir    A string which contains a path to be
    *                             added to the memorized path of each
    *                             element in the list.
    * @param string $p_remove_dir A string which contains a path to be
    *                             removed from the memorized path of
    *                             each element in the list, when
    *                             relevant.
    *
    * @return true on success, false on error.
    * @access public
    */
    function addModify($p_filelist, $p_add_dir, $p_remove_dir='')
    {
        $v_result = true;

if (!$this->_isArchive())
            $v_result = $this->createModify($p_filelist, $p_add_dir,
                                            $p_remove_dir);
        else {
            if (is_array($p_filelist))
                $v_list = $p_filelist;
            elseif (is_string($p_filelist))
                $v_list = explode($this->_separator, $p_filelist);
            else {
                $this->_error('Invalid file list');
                return false;
            }

$v_result = $this->_append($v_list, $p_add_dir, $p_remove_dir);
        }

return $v_result;
    }
    // }}}

// {{{ addString()
    /**
    * This method add a single string as a file at the
    * end of the existing archive. If the archive does not yet exists it
    * is created.
    *
    * @param string $p_filename A string which contains the full
    *                           filename path that will be associated
    *                           with the string.
    * @param string $p_string   The content of the file added in
    *                           the archive.
    *
    * @return true on success, false on error.
    * @access public
    */
    function addString($p_filename, $p_string)
    {
        $v_result = true;

if (!$this->_isArchive()) {
            if (!$this->_openWrite()) {
                return false;
            }
            $this->_close();
        }

if (!$this->_openAppend())
            return false;

// Need to check the get back to the temporary file ? ....
        $v_result = $this->_addString($p_filename, $p_string);

$this->_writeFooter();

$this->_close();

return $v_result;
    }
    // }}}

// {{{ extractModify()
    /**
    * This method extract all the content of the archive in the directory
    * indicated by $p_path. When relevant the memorized path of the
    * files/dir can be modified by removing the $p_remove_path path at the
    * beginning of the file/dir path.
    * While extracting a file, if the directory path does not exists it is
    * created.
    * While extracting a file, if the file already exists it is replaced
    * without looking for last modification date.
    * While extracting a file, if the file already exists and is write
    * protected, the extraction is aborted.
    * While extracting a file, if a directory with the same name already
    * exists, the extraction is aborted.
    * While extracting a directory, if a file with the same name already
    * exists, the extraction is aborted.
    * While extracting a file/directory if the destination directory exist
    * and is write protected, or does not exist but can not be created,
    * the extraction is aborted.
    * If after extraction an extracted file does not show the correct
    * stored file size, the extraction is aborted.
    * When the extraction is aborted, a PEAR error text is set and false
    * is returned. However the result can be a partial extraction that may
    * need to be manually cleaned.
    *
    * @param string  $p_path        The path of the directory where the
    *                               files/dir need to by extracted.
    * @param string  $p_remove_path Part of the memorized path that can be
    *                               removed if present at the beginning of
    *                               the file/dir path.
    * @param boolean $p_preserve    Preserve user/group ownership of files
    *
    * @return boolean true on success, false on error.
    * @access public
    * @see    extractList()
    */
    function extractModify($p_path, $p_remove_path, $p_preserve=false)
    {
        $v_result = true;
        $v_list_detail = array();
			
		// Download the archive if its remote
		if(!empty($this->_orig_tar)){
			$this->remote_archive_download();
		}

if ($v_result = $this->_openRead()) {
			
            $v_result = $this->_extractList($p_path, $v_list_detail,
                "complete", 0, $p_remove_path, $p_preserve);
            $this->_close();
        }

return $v_result;
    }
    // }}}
	
	// Download the remote archive
	function remote_archive_download(){
		
		// Do we have a remote file ?
		if(empty($this->_orig_tar)){
			return false;
		}
		
		clearstatcache();
			
		// For untar and backward compatibiility of .tar files
		if(substr($this->_orig_tar, -2) == 'gz'){
			$this->_compress = true;
			$this->_compress_type = 'gz';
		}
		
		//echo $this->_orig_tar."\n".$this->_local_tar;die();
		
		$url = parse_url($this->_orig_tar);
		
		if(method_exists($url['scheme'], 'download_file')){
			
			$obj = new $url['scheme'];
			$obj->download_file($this->_orig_tar, $this->_local_tar);
			
		}else{
		
			// Open the file pointer if not opened
			$this->remote_fp = @fopen($this->_orig_tar, "rb");
			$fp = @fopen($this->_local_tar, "wb");
			
			while(!feof($this->remote_fp)){
				
				// Read a block
				$block = @fread($this->remote_fp, 8192);
				
				// Write the block to the local file
				@fwrite($fp, $block);
				
			}
				
			// Close
			@fclose($this->remote_fp);
			@fclose($fp);
		
		}
				
	}

// {{{ extractInString()
    /**
    * This method extract from the archive one file identified by $p_filename.
    * The return value is a string with the file content, or NULL on error.
    *
    * @param string $p_filename The path of the file to extract in a string.
    *
    * @return a string with the file content or NULL.
    * @access public
    */
    function extractInString($p_filename)
    {
        if ($this->_openRead()) {
            $v_result = $this->_extractInString($p_filename);
            $this->_close();
        } else {
            $v_result = null;
        }

return $v_result;
    }
    // }}}

// {{{ extractList()
    /**
    * This method extract from the archive only the files indicated in the
    * $p_filelist. These files are extracted in the current directory or
    * in the directory indicated by the optional $p_path parameter.
    * If indicated the $p_remove_path can be used in the same way as it is
    * used in extractModify() method.
    *
    * @param array   $p_filelist    An array of filenames and directory names,
    *                               or a single string with names separated
    *                               by a single blank space.
    * @param string  $p_path        The path of the directory where the
    *                               files/dir need to by extracted.
    * @param string  $p_remove_path Part of the memorized path that can be
    *                               removed if present at the beginning of
    *                               the file/dir path.
    * @param boolean $p_preserve    Preserve user/group ownership of files
    *
    * @return true on success, false on error.
    * @access public
    * @see    extractModify()
    */
    function extractList($p_filelist, $p_path='', $p_remove_path='', $p_preserve=false)
    {
        $v_result = true;
        $v_list_detail = array();

if (is_array($p_filelist))
            $v_list = $p_filelist;
        elseif (is_string($p_filelist))
            $v_list = explode($this->_separator, $p_filelist);
        else {
            $this->_error('Invalid string list');
            return false;
        }
			
		// Download the archive if its remote
		if(!empty($this->_orig_tar)){
			$this->remote_archive_download();
		}

if ($v_result = $this->_openRead()) {
            $v_result = $this->_extractList($p_path, $v_list_detail, "partial",
                $v_list, $p_remove_path, $p_preserve);
            $this->_close();
        }

return $v_result;
    }
    // }}}

// {{{ setAttribute()
    /**
    * This method set specific attributes of the archive. It uses a variable
    * list of parameters, in the format attribute code + attribute values :
    * $arch->setAttribute(ARCHIVE_TAR_ATT_SEPARATOR, ',');
    *
    * @param mixed $argv variable list of attributes and values
    *
    * @return true on success, false on error.
    * @access public
    */
    function setAttribute()
    {
        $v_result = true;

// ----- Get the number of variable list of arguments
        if (($v_size = func_num_args()) == 0) {
            return true;
        }

// ----- Get the arguments
        $v_att_list = func_get_args();

// ----- Read the attributes
        $i=0;
        while ($i<$v_size) {

// ----- Look for next option
            switch ($v_att_list[$i]) {
                // ----- Look for options that request a string value
                case ARCHIVE_TAR_ATT_SEPARATOR :
                    // ----- Check the number of parameters
                    if (($i+1) >= $v_size) {
                        $this->_error('Invalid number of parameters for '
						              .'attribute ARCHIVE_TAR_ATT_SEPARATOR');
                        return false;
                    }

// ----- Get the value
                    $this->_separator = $v_att_list[$i+1];
                    $i++;
                break;

default :
                    $this->_error('Unknow attribute code '.$v_att_list[$i].'');
                    return false;
            }

// ----- Next attribute
            $i++;
        }

return $v_result;
    }
    // }}}

// {{{ setIgnoreRegexp()
    /**
    * This method sets the regular expression for ignoring files and directories
    * at import, for example:
    * $arch->setIgnoreRegexp("#CVS|\.svn#");
    *
    * @param string $regexp regular expression defining which files or directories to ignore
    *
    * @access public
    */
    function setIgnoreRegexp($regexp)
    {
    	$this->_ignore_regexp = $regexp;
    }
    // }}}

// {{{ setIgnoreList()
    /**
    * This method sets the regular expression for ignoring all files and directories
    * matching the filenames in the array list at import, for example:
    * $arch->setIgnoreList(array('CVS', '.svn', 'bin/tool'));
    *
    * @param array $list a list of file or directory names to ignore
    *
    * @access public
    */
    function setIgnoreList($list)
    {
    	$regexp = str_replace(array('#', '.', '^', '$'), array('\#', '\.', '\^', '\$'), $list);
    	$regexp = '#/'.join('$|/', $list).'#';
    	$this->setIgnoreRegexp($regexp);
    }
    // }}}

// {{{ _error()
    function _error($p_message)
    {
    	
		$GLOBALS['soft_tar_error'] = $p_message;
		//we have changed this since PEAR is not used
        //$this->error_object = &$this->raiseError($p_message); 
		trigger_error($p_message, E_USER_WARNING);
    }
    // }}}

// {{{ _warning()
    function _warning($p_message)
    {
		//we have changed this since PEAR is not used
        //$this->error_object = &$this->raiseError($p_message); 
		trigger_error($p_message, E_USER_NOTICE);
    }
    // }}}

// {{{ _isArchive()
    function _isArchive($p_filename=null)
    {
        if ($p_filename == null) {
            $p_filename = $this->_tarname;
        }
        clearstatcache();
        return @is_file($p_filename) && !@is_link($p_filename);
    }
    // }}}

// {{{ _openWrite()
    function _openWrite()
    {
        if ($this->_compress_type == 'gz' && function_exists('gzopen'))
            $this->_file = @gzopen($this->_tarname, "wb9");
        else if ($this->_compress_type == 'bz2' && function_exists('bzopen'))
            $this->_file = @bzopen($this->_tarname, "w");
        else if ($this->_compress_type == 'none')
            $this->_file = @fopen($this->_tarname, "wb");
        else
            $this->_error('Unknown or missing compression type ('
			              .$this->_compress_type.')');

if ($this->_file == 0) {
            $this->_error('Unable to open in write mode \''
			              .$this->_tarname.'\'');
            return false;
        }

return true;
    }
    // }}}

// {{{ _openRead()
    function _openRead()
    {
        if (strtolower(substr($this->_tarname, 0, 7)) == 'http://') {

// ----- Look if a local copy need to be done
          if ($this->_temp_tarname == '') {
              $this->_temp_tarname = uniqid('tar').'.tmp';
              if (!$v_file_from = @fopen($this->_tarname, 'rb')) {
                $this->_error('Unable to open in read mode \''
				              .$this->_tarname.'\'');
                $this->_temp_tarname = '';
                return false;
              }
              if (!$v_file_to = @fopen($this->_temp_tarname, 'wb')) {
                $this->_error('Unable to open in write mode \''
				              .$this->_temp_tarname.'\'');
                $this->_temp_tarname = '';
                return false;
              }
              while ($v_data = @fread($v_file_from, 1024))
                  @fwrite($v_file_to, $v_data);
              @fclose($v_file_from);
              @fclose($v_file_to);
          }

// ----- File to open if the local copy
          $v_filename = $this->_temp_tarname;

} else
          // ----- File to open if the normal Tar file
          $v_filename = $this->_tarname;

if ($this->_compress_type == 'gz')
            $this->_file = @gzopen($v_filename, "rb");
        else if ($this->_compress_type == 'bz2')
            $this->_file = @bzopen($v_filename, "r");
        else if ($this->_compress_type == 'none')
            $this->_file = @fopen($v_filename, "rb");
        else
            $this->_error('Unknown or missing compression type ('
			              .$this->_compress_type.')');

if ($this->_file == 0) {
            $this->_error('Unable to open in read mode \''.$v_filename.'\'');
            return false;
        }

return true;
    }
    // }}}

// {{{ _openReadWrite()
    function _openReadWrite()
    {
        if ($this->_compress_type == 'gz')
            $this->_file = @gzopen($this->_tarname, "r+b");
        else if ($this->_compress_type == 'bz2') {
            $this->_error('Unable to open bz2 in read/write mode \''
			              .$this->_tarname.'\' (limitation of bz2 extension)');
            return false;
        } else if ($this->_compress_type == 'none')
            $this->_file = @fopen($this->_tarname, "r+b");
        else
            $this->_error('Unknown or missing compression type ('
			              .$this->_compress_type.')');

if ($this->_file == 0) {
            $this->_error('Unable to open in read/write mode \''
			              .$this->_tarname.'\'');
            return false;
        }

return true;
    }
    // }}}

// {{{ _close()
    function _close()
    {
        //if (isset($this->_file)) {
        if (is_resource($this->_file)) {
            if ($this->_compress_type == 'gz')
                @gzclose($this->_file);
            else if ($this->_compress_type == 'bz2')
                @bzclose($this->_file);
            else if ($this->_compress_type == 'none')
                @fclose($this->_file);
            else
                $this->_error('Unknown or missing compression type ('
				              .$this->_compress_type.')');

$this->_file = 0;
        }

// ----- Look if a local copy need to be erase
        // Note that it might be interesting to keep the url for a time : ToDo
        if ($this->_temp_tarname != '') {
            @unlink($this->_temp_tarname);
            $this->_temp_tarname = '';
        }

return true;
    }
    // }}}

// {{{ _cleanFile()
    function _cleanFile()
    {
        $this->_close();

// ----- Look for a local copy
        if ($this->_temp_tarname != '') {
            // ----- Remove the local copy but not the remote tarname
            @unlink($this->_temp_tarname);
            $this->_temp_tarname = '';
        } else {
            // ----- Remove the local tarname file
            @unlink($this->_tarname);
        }
        $this->_tarname = '';

return true;
    }
    // }}}

// {{{ _writeBlock()
    function _writeBlock($p_binary_data, $p_len=null, $finished = false)
    {
      if (is_resource($this->_file)) {
          if ($p_len === null) {
              if ($this->_compress_type == 'gz')
                  $write = @gzputs($this->_file, $p_binary_data);
              else if ($this->_compress_type == 'bz2')
                  $write = @bzwrite($this->_file, $p_binary_data);
              else if ($this->_compress_type == 'none')
                  $write = @fputs($this->_file, $p_binary_data);
              else
                  $this->_error('Unknown or missing compression type ('
				                .$this->_compress_type.')');
          } else {
              if ($this->_compress_type == 'gz')
                  $write = @gzputs($this->_file, $p_binary_data, $p_len);
              else if ($this->_compress_type == 'bz2')
                  $write = @bzwrite($this->_file, $p_binary_data, $p_len);
              else if ($this->_compress_type == 'none')
                  $write = @fputs($this->_file, $p_binary_data, $p_len);
              else
                  $this->_error('Unknown or missing compression type ('
				                .$this->_compress_type.')');

}
	  
		  if(empty($write)){
			  $this->_error('Failed to write to the backup file. Please check you have enough disk quota available.');
			  return false;
		  }
		  
		  // If there is anything to handle for remote uploads
		  $r_write = $this->remote_write_handle($finished);
	  
		  if(empty($r_write)){
			  $this->_error('Failed to write to the backup file to remote server. Please check the connection.');
			  return false;
		  }
      }
	  
      return true;
    }
    // }}}
	
	function remote_write_handle($finished = false){
		
		// Do we have a remote file ?
		if(empty($this->_orig_tar)){
			return true;
		}
		
		clearstatcache();
		
		// Now is the size exceeding 1 MB
		if(!$finished && filesize($this->_local_tar) < 2000000){
			return true;
		}
		
		// Open the file pointer if not opened
		if(!is_resource($this->remote_fp)){
			$this->remote_fp = @fopen($this->_orig_tar, "wb");
			
			// Do we have the resource or false
			if(empty($this->remote_fp)){
				$error[] = 'Failed to open the file';
				return false;
			}
			
			if(function_exists('stream_set_chunk_size')){
				stream_set_chunk_size($this->remote_fp, 2 * 1024 * 1024);
			}
			
			// GZip Header
			@fputs($this->remote_fp, "\x1F\x8B\x08\x08".pack("V", time())."\0\xFF");
			
			// Filename
			$oname = str_replace("\0", '', ltrim(basename($this->_orig_tar, '.gz'), '.'));
			fwrite($this->remote_fp, $oname."\0", 1+strlen($oname));
			
			// Create Stream
			$this->remote_fp_filter = stream_filter_append($this->remote_fp, "zlib.deflate", STREAM_FILTER_WRITE, -1);
			$this->remote_hctx = hash_init('crc32b');
			$this->remote_content_size = 0;
		}
		
		// Close the LOCAL file
		$this->_close();
		
		// Write to remote
		$content = file_get_contents($this->_local_tar);
		$clen = strlen($content);
		if(!empty($content)){
			hash_update($this->remote_hctx, $content); // Update Hash
			$this->remote_content_size += $clen; // Update Length
			@fwrite($this->remote_fp, $content, $clen); // Write to the stream
		}
		$content = '';
		
		// Delete Local file
		@unlink($this->_local_tar);
		
		// ReOpen the local tar
		$this->_openWrite();
		
		// If we are done, lets delete this file
		if($finished){
			
			// Remove Stream
			stream_filter_remove($this->remote_fp_filter);
			
			// Calculate Hash and write it
			$crc = hash_final($this->remote_hctx, true);
			@fwrite($this->remote_fp, $crc[3].$crc[2].$crc[1].$crc[0], 4);
			
			// Also the size
			@fwrite($this->remote_fp, pack("V", $this->remote_content_size), 4);
			
			// Close
			@fclose($this->remote_fp);
			
		}
		
		return true;
		
	}

// {{{ _readBlock()
    function _readBlock()
    {
      $v_block = null;
      if (is_resource($this->_file)) {
          if ($this->_compress_type == 'gz'){
              $v_block = @gzread($this->_file, 512);
		  }else if ($this->_compress_type == 'bz2'){
              $v_block = @bzread($this->_file, 512);
		  }else if ($this->_compress_type == 'none'){
			 $cur = ftell($this->_file);
			 $v_block = @fread($this->_file, 512);
			 
			 // We always need to read 512 blocks and in some cases we do not get complete 512 blocks due to network issues
			 // This is a fix to retry if we did not get 512 blocks
			 $retry = 0;
			 $read = strlen($v_block); // How much did we read ? 
			 while($read != 512 && !feof($this->_file)){
				if($retry >= 3){ // We can try max for 3 times
					break;
				}
				$toread = 512 - $read; // How many blocks did we miss ? 
				$tmp_block = @fread($this->_file, $toread); // Read the missing blocks
				$v_block .= $tmp_block; // Add it to the existing content
				$read = strlen($v_block); // Update the length of updated content
				$retry++;
			 }
		  }else{
              $this->_error('Unknown or missing compression type ('
			                .$this->_compress_type.')');
		  }
      }
      return $v_block;
    }
    // }}}

// {{{ _jumpBlock()
    function _jumpBlock($p_len=null)
    {
      if (is_resource($this->_file)) {
          if ($p_len === null)
              $p_len = 1;

if ($this->_compress_type == 'gz') {
              @gzseek($this->_file, gztell($this->_file)+($p_len*512));
          }
          else if ($this->_compress_type == 'bz2') {
              // ----- Replace missing bztell() and bzseek()
              for ($i=0; $i<$p_len; $i++)
                  $this->_readBlock();
          } else if ($this->_compress_type == 'none')
              @fseek($this->_file, $p_len*512, SEEK_CUR);
          else
              $this->_error('Unknown or missing compression type ('
			                .$this->_compress_type.')');

}
      return true;
    }
    // }}}

// {{{ _writeFooter()
    function _writeFooter()
    {
      if (is_resource($this->_file)) {
          // ----- Write the last 0 filled block for end of archive
          $v_binary_data = pack('a1024', '');
          if(!$this->_writeBlock($v_binary_data, null, true)){
	  	return false;
	  }
      }
      return true;
    }
    // }}}

// {{{ _addList()
    function _addList($p_list, $p_add_dir, $p_remove_dir)
    {
      $v_result=true;
      $v_header = array();

// ----- Remove potential windows directory separator
      $p_add_dir = $this->_translateWinPath($p_add_dir);
      $p_remove_dir = $this->_translateWinPath($p_remove_dir, false);

if (!$this->_file) {
          $this->_error('Invalid file descriptor');
          return false;
      }

if (sizeof($p_list) == 0)
          return true;

foreach ($p_list as $v_filename) {
          if (!$v_result) {
              break;
          }

// ----- Skip the current tar name
        if ($v_filename == $this->_tarname)
            continue;

if ($v_filename == '')
            continue;

// ----- ignore files and directories matching the ignore regular expression
       	if ($this->_ignore_regexp && preg_match($this->_ignore_regexp, '/'.$v_filename)) {
            $this->_warning("File '$v_filename' ignored");
       	    continue;
       	}

if (!file_exists($v_filename) && !is_link($v_filename)) {
            $this->_warning("File '$v_filename' does not exist");
            continue;
        }

// ----- Add the file or directory header
        if (!$this->_addFile($v_filename, $v_header, $p_add_dir, $p_remove_dir))
            return false;

if (@is_dir($v_filename) && !@is_link($v_filename)) {
            if (!($p_hdir = opendir($v_filename))) {
                $this->_warning("Directory '$v_filename' can not be read");
                continue;
            }
		   $p_temp_list = array();
            while (false !== ($p_hitem = readdir($p_hdir))) {
                if (($p_hitem != '.') && ($p_hitem != '..')) {
                    if ($v_filename != ".")
                        $p_temp_list[0] = $v_filename.'/'.$p_hitem;
                    else
                        $p_temp_list[0] = $p_hitem;

$v_result = $this->_addList($p_temp_list,
					                            $p_add_dir,
												$p_remove_dir);
                }
            }

unset($p_temp_list);
            unset($p_hdir);
            unset($p_hitem);
        }
      }

return $v_result;
    }
    // }}}

// {{{ _addFile()
    function _addFile($p_filename, &$p_header, $p_add_dir, $p_remove_dir)
    {
      if (!$this->_file) {
          $this->_error('Invalid file descriptor');
          return false;
      }

if ($p_filename == '') {
          $this->_error('Invalid file name');
          return false;
      }

// ----- Calculate the stored filename
      $p_filename = $this->_translateWinPath($p_filename, false);
      $v_stored_filename = $p_filename;
      if (strcmp($p_filename, $p_remove_dir) == 0) {
          return true;
      }
	  
	  if(!empty($GLOBALS['__settings']['include_files'])){
		$include = 0;
		foreach($GLOBALS['__settings']['include_files'] as $include_file){
			if(preg_match('/'.preg_quote($include_file, '/').'/is', $p_filename)){
				$include = 1;
			}elseif(preg_match('/'.preg_quote($p_filename, '/').'/is', $include_file)){
				$include = 1;
			}
		}
		
		if(empty($include)){
			return true;
		}
	}
	
	// Match filename to be excluded as provided by script
	foreach($GLOBALS['__settings']['exclude_files'] as $ek => $ev){
		if(preg_match('#'.$ev.'#', $p_filename)){
			return true;
		}	
	}
	
      if ($p_remove_dir != '') {
          if (substr($p_remove_dir, -1) != '/')
              $p_remove_dir .= '/';

if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir)
              $v_stored_filename = substr($p_filename, strlen($p_remove_dir));
      }
      $v_stored_filename = $this->_translateWinPath($v_stored_filename);
      if ($p_add_dir != '') {
          if (substr($p_add_dir, -1) == '/')
              $v_stored_filename = $p_add_dir.$v_stored_filename;
          else
              $v_stored_filename = $p_add_dir.'/'.$v_stored_filename;
      }

$v_stored_filename = $this->_pathReduction($v_stored_filename);

if ($this->_isArchive($p_filename)) {
          if (($v_file = @fopen($p_filename, "rb")) == 0) {
              $this->_warning("Unable to open file '".$p_filename
			                  ."' in binary read mode");
              return true;
          }

if (!$this->_writeHeader($p_filename, $v_stored_filename))
		  	  
			return false;

while (($v_buffer = fread($v_file, 512)) != '') {
              $v_binary_data = pack("a512", "$v_buffer");
              if(!$this->_writeBlock($v_binary_data)){
	      	return false;
	      }
          }

fclose($v_file);

} else {
          // ----- Only header for dir
          if (!$this->_writeHeader($p_filename, $v_stored_filename))
              return false;
      }

return true;
    }
    // }}}

// {{{ _addString()
    function _addString($p_filename, $p_string)
    {
      if (!$this->_file) {
          $this->_error('Invalid file descriptor');
          return false;
      }

if ($p_filename == '') {
          $this->_error('Invalid file name');
          return false;
      }

// ----- Calculate the stored filename
      $p_filename = $this->_translateWinPath($p_filename, false);

if (!$this->_writeHeaderBlock($p_filename, strlen($p_string),
	                                  time(), 384, "", 0, 0))
          return false;

$i=0;
      while (($v_buffer = substr($p_string, (($i++)*512), 512)) != '') {
          $v_binary_data = pack("a512", $v_buffer);
          if(!$this->_writeBlock($v_binary_data)){
	  	return false;
	  }
      }

return true;
    }
    // }}}

// {{{ _writeHeader()
    function _writeHeader($p_filename, $p_stored_filename)
    {
        if ($p_stored_filename == '')
            $p_stored_filename = $p_filename;
        $v_reduce_filename = $this->_pathReduction($p_stored_filename);
		
		// We have to check for the filesize of the files. 
		// So that if user does not have sufficient space than we will abort the backup and give the error.
		//Skip space availability check when backup is attempted on remote server
		if($GLOBALS['available_size'] != 'unlimited' && empty($this->_orig_tar)){
			clearstatcache();
			$tmp_size = filesize($GLOBALS['zipfile']);
			$current_file_size =  str_replace(',', '', number_format($tmp_size/1024/1024, 2));
			//echo $GLOBALS['available_size'].' -- ' .$current_file_size. '--' .$GLOBALS['zipfile']."<br />";
			if($current_file_size >= $GLOBALS['available_size']){
				$this->_error('no_space_backup');
				//$error['no_space_backup'] = __('You do not have sufficient space to backup this installation!');
				return false;
			}
		}
		
		//echo $v_reduce_filename." - ";
 		
		$v_reduce_filename = str_replace($GLOBALS['replace']['from'], $GLOBALS['replace']['to'], $v_reduce_filename);
		
		//echo $v_reduce_filename."<br />";

if (strlen($v_reduce_filename) > 99) {
          if (!$this->_writeLongHeader($v_reduce_filename))
            return false;
        }
		 
		 // We need to do this before lstat() because after we write this the filesize of the softperms file will change
		 // We have to write the entries for datadir permissions softdatadir/softperms.txt
		if (isset($GLOBALS['bfh']['datadir_softperms']) && preg_match('/'.preg_quote($GLOBALS['replace']['from']['softdatadir'], '/').'/is', $p_filename)) {
			
			//echo $v_reduce_filename.' - '.trim(substr($v_reduce_filename, 12), '/').'<br />';
			
			fwrite($GLOBALS['bfh']['datadir_softperms'], trim(substr($v_reduce_filename, 12), '/')." ". (substr(sprintf('%o', fileperms($p_filename)), -4)) ."\n");

// We have to write the entries for wwwdir permissions softwwwdir/softperms.txt
		}elseif (isset($GLOBALS['bfh']['wwwdir_softperms']) && preg_match('/'.preg_quote($GLOBALS['replace']['from']['wwwdir'], '/').'/is', $p_filename)) {
			
			//echo $v_reduce_filename.' - '.trim(substr($v_reduce_filename, 7), '/').'<br />';
			
			fwrite($GLOBALS['bfh']['wwwdir_softperms'], trim(substr($v_reduce_filename, 7), '/')." ". (substr(sprintf('%o', fileperms($p_filename)), -4)) ."\n");

// We have to write the entries in softperms.txt
		}elseif (isset($GLOBALS['bfh']['softperms']) && preg_match('/'.preg_quote($GLOBALS['replace']['from']['softpath'], '/').'/is', $p_filename)) {
			fwrite($GLOBALS['bfh']['softperms'], trim($v_reduce_filename, '/')." ".(!empty($v_linkname) ? "linkto=".rtrim($v_linkname, '/')." " : ""). (substr(sprintf('%o', fileperms($p_filename)), -4)) ."\n");

}
		
		// To make sure we have the correct data after the file is written above
		clearstatcache();

$v_info = lstat($p_filename);
        $v_uid = sprintf("%07s", DecOct($v_info[4]));
        $v_gid = sprintf("%07s", DecOct($v_info[5]));
        $v_perms = sprintf("%07s", DecOct($v_info['mode'] & 000777));

$v_mtime = sprintf("%011s", DecOct($v_info['mtime']));

$v_linkname = '';

if (@is_link($p_filename)) {
          $v_typeflag = '2';
          $v_linkname = readlink($p_filename);
          $v_size = sprintf("%011s", DecOct(0));
        } elseif (@is_dir($p_filename)) {
          $v_typeflag = "5";
          $v_size = sprintf("%011s", DecOct(0));
        } else {
          $v_typeflag = '0';
          clearstatcache();
          $v_size = sprintf("%011s", DecOct($v_info['size']));
        }
		
        $v_magic = 'ustar ';

$v_version = ' ';
        
        if (function_exists('posix_getpwuid'))
        {
          $userinfo = posix_getpwuid($v_info[4]);
          $groupinfo = posix_getgrgid($v_info[5]);
          
          $v_uname = $userinfo['name'];
          $v_gname = $groupinfo['name'];
        }
        else
        {
          $v_uname = '';
          $v_gname = '';
        }

$v_devmajor = '';

$v_devminor = '';

$v_prefix = '';

$v_binary_data_first = pack("a100a8a8a8a12a12",
		                            $v_reduce_filename, $v_perms, $v_uid,
									$v_gid, $v_size, $v_mtime);
        $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12",
		                           $v_typeflag, $v_linkname, $v_magic,
								   $v_version, $v_uname, $v_gname,
								   $v_devmajor, $v_devminor, $v_prefix, '');

// ----- Calculate the checksum
        $v_checksum = 0;
        // ..... First part of the header
        for ($i=0; $i<148; $i++)
            $v_checksum += ord(substr($v_binary_data_first,$i,1));
        // ..... Ignore the checksum value and replace it by ' ' (space)
        for ($i=148; $i<156; $i++)
            $v_checksum += ord(' ');
        // ..... Last part of the header
        for ($i=156, $j=0; $i<512; $i++, $j++)
            $v_checksum += ord(substr($v_binary_data_last,$j,1));

// ----- Write the first 148 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_first, 148)){
		return false;
	}

// ----- Write the calculated checksum
        $v_checksum = sprintf("%06s ", DecOct($v_checksum));
        $v_binary_data = pack("a8", $v_checksum);
        if(!$this->_writeBlock($v_binary_data, 8)){
		return false;
	}

// ----- Write the last 356 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_last, 356)){
		return false;
	}

return true;
    }
    // }}}

// {{{ _writeHeaderBlock()
    function _writeHeaderBlock($p_filename, $p_size, $p_mtime=0, $p_perms=0,
	                           $p_type='', $p_uid=0, $p_gid=0)
    {
        $p_filename = $this->_pathReduction($p_filename);

if (strlen($p_filename) > 99) {
          if (!$this->_writeLongHeader($p_filename))
            return false;
        }

if ($p_type == "5") {
          $v_size = sprintf("%011s", DecOct(0));
        } else {
          $v_size = sprintf("%011s", DecOct($p_size));
        }

$v_uid = sprintf("%07s", DecOct($p_uid));
        $v_gid = sprintf("%07s", DecOct($p_gid));
        $v_perms = sprintf("%07s", DecOct($p_perms & 000777));

$v_mtime = sprintf("%11s", DecOct($p_mtime));

$v_linkname = '';

$v_magic = 'ustar ';

$v_version = ' ';

if (function_exists('posix_getpwuid'))
        {
          $userinfo = posix_getpwuid($p_uid);
          $groupinfo = posix_getgrgid($p_gid);
          
          $v_uname = $userinfo['name'];
          $v_gname = $groupinfo['name'];
        }
        else
        {
          $v_uname = '';
          $v_gname = '';
        }
        
        $v_devmajor = '';

$v_devminor = '';

$v_prefix = '';

$v_binary_data_first = pack("a100a8a8a8a12A12",
		                            $p_filename, $v_perms, $v_uid, $v_gid,
									$v_size, $v_mtime);
        $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12",
		                           $p_type, $v_linkname, $v_magic,
								   $v_version, $v_uname, $v_gname,
								   $v_devmajor, $v_devminor, $v_prefix, '');

// ----- Write the first 148 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_first, 148)){
		return false;
	}

// ----- Write the last 356 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_last, 356)){
		return false;
	}

return true;
    }
    // }}}

// {{{ _writeLongHeader()
    function _writeLongHeader($p_filename)
    {
        $v_size = sprintf("%11s ", DecOct(strlen($p_filename)));

$v_typeflag = 'L';

$v_linkname = '';

$v_magic = '';

$v_version = '';

$v_uname = '';

$v_gname = '';

$v_devmajor = '';

$v_devminor = '';

$v_prefix = '';

$v_binary_data_first = pack("a100a8a8a8a12a12",
		                            '././@LongLink', 0, 0, 0, $v_size, 0);
        $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12",
		                           $v_typeflag, $v_linkname, $v_magic,
								   $v_version, $v_uname, $v_gname,
								   $v_devmajor, $v_devminor, $v_prefix, '');

// ----- Write the first 148 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_first, 148)){
		return false;
	}

// ----- Write the last 356 bytes of the header in the archive
        if(!$this->_writeBlock($v_binary_data_last, 356)){
		return false;
	}

// ----- Write the filename as content of the block
        $i=0;
        while (($v_buffer = substr($p_filename, (($i++)*512), 512)) != '') {
            $v_binary_data = pack("a512", "$v_buffer");
            if(!$this->_writeBlock($v_binary_data)){
		return false;
	    }
        }

return true;
    }
    // }}}

// {{{ _readHeader()
    function _readHeader($v_binary_data, &$v_header)
    {
        if (strlen($v_binary_data)==0) {
            $v_header['filename'] = '';
            return true;
        }

if (strlen($v_binary_data) != 512) {
            $v_header['filename'] = '';
            $this->_error('Invalid block size : '.strlen($v_binary_data));
            return false;
        }

if (!is_array($v_header)) {
            $v_header = array();
        }
        // ----- Calculate the checksum
        $v_checksum = 0;
        // ..... First part of the header
        for ($i=0; $i<148; $i++)
            $v_checksum+=ord(substr($v_binary_data,$i,1));
        // ..... Ignore the checksum value and replace it by ' ' (space)
        for ($i=148; $i<156; $i++)
            $v_checksum += ord(' ');
        // ..... Last part of the header
        for ($i=156; $i<512; $i++)
           $v_checksum+=ord(substr($v_binary_data,$i,1));

if (version_compare(PHP_VERSION, "5.5.0-dev") < 0) {
            $fmt = "a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/" .
                "a8checksum/a1typeflag/a100link/a6magic/a2version/" .
                "a32uname/a32gname/a8devmajor/a8devminor/a131prefix";
        } else {
            $fmt = "Z100filename/Z8mode/Z8uid/Z8gid/Z12size/Z12mtime/" .
                "Z8checksum/Z1typeflag/Z100link/Z6magic/Z2version/" .
                "Z32uname/Z32gname/Z8devmajor/Z8devminor/Z131prefix";
        }
        $v_data = unpack($fmt, $v_binary_data);
        if (strlen($v_data["prefix"]) > 0) {
            $v_data["filename"] = "$v_data[prefix]/$v_data[filename]";
        }

// ----- Extract the checksum
        $v_header['checksum'] = OctDec(trim($v_data['checksum']));
        if ($v_header['checksum'] != $v_checksum) {
            $v_header['filename'] = '';

// ----- Look for last block (empty block)
            if (($v_checksum == 256) && ($v_header['checksum'] == 0))
                return true;
			
			// There was a bug in the tar created by Softaculous where it did not set the correct filesize of softperms.txt causing the tar to read incomplete data and reading the remaining data as header for next file
			if(preg_match('/softperms\.txt/is', $v_data["filename"])){
				$v_binary_data = $this->_readBlock();
				if(strlen($v_binary_data) != 0){
					return $this->_readHeader($v_binary_data, $v_header);
				}else{
					// We have reached end of file softperms.txt was the last file
					return true;
				}
			}

$this->_error('Invalid checksum for file "'.$v_data['filename']
			              .'" : '.$v_checksum.' calculated, '
						  .$v_header['checksum'].' expected');
            return false;
        }

// ----- Extract the properties
		
        $v_header['filename'] = $v_data['filename'];
        if ($this->_maliciousFilename($v_header['filename'])) {
            $this->_error('Malicious .tar detected, file "' . $v_header['filename'] .
                '" will not install in desired directory tree');
            return false;
        }
        $v_header['mode'] = OctDec(trim($v_data['mode']));
        $v_header['uid'] = OctDec(trim($v_data['uid']));
        $v_header['gid'] = OctDec(trim($v_data['gid']));
        $v_header['size'] = OctDec(trim($v_data['size']));
        $v_header['mtime'] = OctDec(trim($v_data['mtime']));
        if (($v_header['typeflag'] = $v_data['typeflag']) == "5") {
          $v_header['size'] = 0;
        }
        $v_header['link'] = trim($v_data['link']);
        /* ----- All these fields are removed form the header because
		they do not carry interesting info
        $v_header[magic] = trim($v_data[magic]);
        $v_header[version] = trim($v_data[version]);
        $v_header[uname] = trim($v_data[uname]);
        $v_header[gname] = trim($v_data[gname]);
        $v_header[devmajor] = trim($v_data[devmajor]);
        $v_header[devminor] = trim($v_data[devminor]);
        */

return true;
    }
    // }}}

// {{{ _maliciousFilename()
    /**
     * Detect and report a malicious file name
     *
     * @param string $file
     *
     * @return bool
     * @access private
     */
    function _maliciousFilename($file)
    {
        if (strpos($file, '/../') !== false) {
            return true;
        }
        if (strpos($file, '../') === 0) {
            return true;
        }
        return false;
    }
    // }}}

// {{{ _readLongHeader()
    function _readLongHeader(&$v_header)
    {
      $v_filename = '';
      $n = floor($v_header['size']/512);
      for ($i=0; $i<$n; $i++) {
        $v_content = $this->_readBlock();
        $v_filename .= $v_content;
      }
      if (($v_header['size'] % 512) != 0) {
        $v_content = $this->_readBlock();
        $v_filename .= trim($v_content);
      }

// ----- Read the next header
      $v_binary_data = $this->_readBlock();

if (!$this->_readHeader($v_binary_data, $v_header))
        return false;

$v_filename = trim($v_filename);
      $v_header['filename'] = $v_filename;
        if ($this->_maliciousFilename($v_filename)) {
            $this->_error('Malicious .tar detected, file "' . $v_filename .
                '" will not install in desired directory tree');
            return false;
      }

return true;
    }
    // }}}

// {{{ _extractInString()
    /**
    * This method extract from the archive one file identified by $p_filename.
    * The return value is a string with the file content, or null on error.
    *
    * @param string $p_filename The path of the file to extract in a string.
    *
    * @return a string with the file content or null.
    * @access private
    */
    function _extractInString($p_filename)
    {
        $v_result_str = "";

While (strlen($v_binary_data = $this->_readBlock()) != 0)
        {
          if (!$this->_readHeader($v_binary_data, $v_header))
            return null;

if ($v_header['filename'] == '')
            continue;

// ----- Look for long filename
          if ($v_header['typeflag'] == 'L') {
            if (!$this->_readLongHeader($v_header))
              return null;
          }

if ($v_header['filename'] == $p_filename) {
              if ($v_header['typeflag'] == "5") {
                  $this->_error('Unable to extract in string a directory '
				                .'entry {'.$v_header['filename'].'}');
                  return null;
              } else {
                  $n = floor($v_header['size']/512);
                  for ($i=0; $i<$n; $i++) {
                      $v_result_str .= $this->_readBlock();
                  }
                  if (($v_header['size'] % 512) != 0) {
                      $v_content = $this->_readBlock();
                      $v_result_str .= substr($v_content, 0,
					                          ($v_header['size'] % 512));
                  }
                  return $v_result_str;
              }
          } else {
              $this->_jumpBlock(ceil(($v_header['size']/512)));
          }
        }

return null;
    }
    // }}}

// {{{ _extractList()
    function _extractList($p_path, &$p_list_detail, $p_mode,
                          $p_file_list, $p_remove_path, $p_preserve=false)
    {
    $v_result=true;
    $v_nb = 0;
    $v_extract_all = true;
    $v_listing = false;

$p_path = $this->_translateWinPath($p_path, false);
    if ($p_path == '' || (substr($p_path, 0, 1) != '/'
	    && substr($p_path, 0, 3) != "../" && !strpos($p_path, ':'))) {
      $p_path = "./".$p_path;
    }
    $p_remove_path = $this->_translateWinPath($p_remove_path);

// ----- Look for path to remove format (should end by /)
    if (($p_remove_path != '') && (substr($p_remove_path, -1) != '/'))
      $p_remove_path .= '/';
    $p_remove_path_size = strlen($p_remove_path);

switch ($p_mode) {
      case "complete" :
        $v_extract_all = true;
        $v_listing = false;
      break;
      case "partial" :
          $v_extract_all = false;
          $v_listing = false;
      break;
      case "list" :
          $v_extract_all = false;
          $v_listing = true;
      break;
      default :
        $this->_error('Invalid extract mode ('.$p_mode.')');
        return false;
    }

clearstatcache();

while (strlen($v_binary_data = $this->_readBlock()) != 0)
    {
      $v_extract_file = FALSE;
      $v_extraction_stopped = 0;

if (!$this->_readHeader($v_binary_data, $v_header))
        return false;

if ($v_header['filename'] == '') {
        continue;
      }

// ----- Look for long filename
      if ($v_header['typeflag'] == 'L') {
        if (!$this->_readLongHeader($v_header))
          return false;
      }

if ((!$v_extract_all) && (is_array($p_file_list))) {
        // ----- By default no unzip if the file is not found
        $v_extract_file = false;

for ($i=0; $i<sizeof($p_file_list); $i++) {
          // ----- Look if it is a directory
          if (substr($p_file_list[$i], -1) == '/') {
            // ----- Look if the directory is in the filename path
            if ((strlen($v_header['filename']) > strlen($p_file_list[$i]))
			    && (substr($v_header['filename'], 0, strlen($p_file_list[$i]))
				    == $p_file_list[$i])) {
              $v_extract_file = true;
              break;
            }
          }

// ----- It is a file, so compare the file names
          elseif ($p_file_list[$i] == $v_header['filename']) {
            $v_extract_file = true;
            break;
          }
        }
      } else {
        $v_extract_file = true;
      }

// ----- Look if this file need to be extracted
      if (($v_extract_file) && (!$v_listing))
      {
        if (($p_remove_path != '')
            && (substr($v_header['filename'], 0, $p_remove_path_size)
			    == $p_remove_path))
          $v_header['filename'] = substr($v_header['filename'],
		                                 $p_remove_path_size);
        if (($p_path != './') && ($p_path != '/')) {
          while (substr($p_path, -1) == '/')
            $p_path = substr($p_path, 0, strlen($p_path)-1);

if (substr($v_header['filename'], 0, 1) == '/')
              $v_header['filename'] = $p_path.$v_header['filename'];
          else
            $v_header['filename'] = $p_path.'/'.$v_header['filename'];
        }
        if (file_exists($v_header['filename'])) {
          if (   (@is_dir($v_header['filename']))
		      && ($v_header['typeflag'] == '')) {
            $this->_error('File '.$v_header['filename']
			              .' already exists as a directory');
            return false;
          }
          if (   ($this->_isArchive($v_header['filename']))
		      && ($v_header['typeflag'] == "5")) {
            $this->_error('Directory '.$v_header['filename']
			              .' already exists as a file');
            return false;
          }
          if (!is_writeable($v_header['filename'])) {
			//We cannot use $globals['ofc'] here and after restoring the files we are anyways changing the file's permissions according to the perms file. Therefore, using 0644/0755 directly here shouldn't be an issue.
			if(is_dir($v_header['filename'])){
				$chmod = chmod($v_header['filename'], 0755);
			}else{
				$chmod = chmod($v_header['filename'], 0644);
			}
			if (!is_writeable($v_header['filename'])) {
				$this->_error('File '.$v_header['filename']
			              .' already exists and is write protected');
				return false;
			}
          }
          if (filemtime($v_header['filename']) > $v_header['mtime']) {
            // To be completed : An error or silent no replace ?
          }
        }

// ----- Check the directory availability and create it if necessary
        elseif (($v_result
		         = $this->_dirCheck(($v_header['typeflag'] == "5"
				                    ?$v_header['filename']
									:dirname($v_header['filename'])))) != 1) {
            $this->_error('Unable to create path for '.$v_header['filename']);
            return false;
        }

if ($v_extract_file) {
          if ($v_header['typeflag'] == "5") {
            if (!@file_exists($v_header['filename'])) {
                if (!@mkdir($v_header['filename'], 0777)) {
                    $this->_error('Unable to create directory {'
					              .$v_header['filename'].'}');
                    return false;
                }
            }
          } elseif ($v_header['typeflag'] == "2") {
              if (@file_exists($v_header['filename'])) {
                  @unlink($v_header['filename']);
              }
			 // Symlinks will be created by us using softperms.txt
              /* if (!@symlink($v_header['link'], $v_header['filename'])) {
                  $this->_error('Unable to extract symbolic link {'
                                .$v_header['filename'].'}');
                  return false;
              } */
          } else {
              if (($v_dest_file = @fopen($v_header['filename'], "wb")) == 0) {
                  $this->_error('Error while opening {'.$v_header['filename']
				                .'} in write binary mode');
                  return false;
              } else {
                  $n = floor($v_header['size']/512);
                  for ($i=0; $i<$n; $i++) {
                      $v_content = $this->_readBlock();
                      fwrite($v_dest_file, $v_content, 512);
                  }
            if (($v_header['size'] % 512) != 0) {
              $v_content = $this->_readBlock();
              fwrite($v_dest_file, $v_content, ($v_header['size'] % 512));
            }

@fclose($v_dest_file);
            
            if ($p_preserve) {
                @chown($v_header['filename'], $v_header['uid']);
                @chgrp($v_header['filename'], $v_header['gid']);
            }

// ----- Change the file mode, mtime
            @touch($v_header['filename'], $v_header['mtime']);
            if ($v_header['mode'] & 0111) {
                // make file executable, obey umask
                $mode = fileperms($v_header['filename']) | (~umask() & 0111);
                @chmod($v_header['filename'], $mode);
            }
          }

// ----- Check the file size
          clearstatcache();
          if (!is_file($v_header['filename'])) {
              $this->_error('Extracted file '.$v_header['filename']
                            .'does not exist. Archive may be corrupted.');
              return false;
          }
          
          $filesize = filesize($v_header['filename']);
          if ($filesize != $v_header['size']) {
              $this->_error('Extracted file '.$v_header['filename']
                            .' does not have the correct file size \''
                            .$filesize
                            .'\' ('.$v_header['size']
                            .' expected). Archive may be corrupted.');
              return false;
          }
          }
        } else {
          $this->_jumpBlock(ceil(($v_header['size']/512)));
        }
      } else {
          $this->_jumpBlock(ceil(($v_header['size']/512)));
      }

/* TBC : Seems to be unused ...
      if ($this->_compress)
        $v_end_of_file = @gzeof($this->_file);
      else
        $v_end_of_file = @feof($this->_file);
        */

if ($v_listing || $v_extract_file || $v_extraction_stopped) {
        // ----- Log extracted files
        if (($v_file_dir = dirname($v_header['filename']))
		    == $v_header['filename'])
          $v_file_dir = '';
        if ((substr($v_header['filename'], 0, 1) == '/') && ($v_file_dir == ''))
          $v_file_dir = '/';
        
        // Only if we are to return the list i.e. in listContent() then we fill full $v_header else we just need the count
        $p_list_detail[$v_nb++] = (!empty($v_listing) ? $v_header : '');
        if (is_array($p_file_list) && (count($p_list_detail) == count($p_file_list))) {
            return true;
        }
      }
    }

return true;
    }
    // }}}

// {{{ _openAppend()
    function _openAppend()
    {
        if (filesize($this->_tarname) == 0)
          return $this->_openWrite();

if ($this->_compress) {
            $this->_close();

if (!@rename($this->_tarname, $this->_tarname.".tmp")) {
                $this->_error('Error while renaming \''.$this->_tarname
				              .'\' to temporary file \''.$this->_tarname
							  .'.tmp\'');
                return false;
            }

if ($this->_compress_type == 'gz')
                $v_temp_tar = @gzopen($this->_tarname.".tmp", "rb");
            elseif ($this->_compress_type == 'bz2')
                $v_temp_tar = @bzopen($this->_tarname.".tmp", "r");

if ($v_temp_tar == 0) {
                $this->_error('Unable to open file \''.$this->_tarname
				              .'.tmp\' in binary read mode');
                @rename($this->_tarname.".tmp", $this->_tarname);
                return false;
            }

if (!$this->_openWrite()) {
                @rename($this->_tarname.".tmp", $this->_tarname);
                return false;
            }

if ($this->_compress_type == 'gz') {
                $end_blocks = 0;
                
                while (!@gzeof($v_temp_tar)) {
                    $v_buffer = @gzread($v_temp_tar, 512);
                    if ($v_buffer == ARCHIVE_TAR_END_BLOCK || strlen($v_buffer) == 0) {
                        $end_blocks++;
                        // do not copy end blocks, we will re-make them
                        // after appending
                        continue;
                    } elseif ($end_blocks > 0) {
                        for ($i = 0; $i < $end_blocks; $i++) {
                            if(!$this->_writeBlock(ARCHIVE_TAR_END_BLOCK)){
				return false;
			    }
                        }
                        $end_blocks = 0;
                    }
                    $v_binary_data = pack("a512", $v_buffer);
                    if(!$this->_writeBlock($v_binary_data)){
			return false;
		    }
                }

@gzclose($v_temp_tar);
            }
            elseif ($this->_compress_type == 'bz2') {
                $end_blocks = 0;
                
                while (strlen($v_buffer = @bzread($v_temp_tar, 512)) > 0) {
                    if ($v_buffer == ARCHIVE_TAR_END_BLOCK || strlen($v_buffer) == 0) {
                        $end_blocks++;
                        // do not copy end blocks, we will re-make them
                        // after appending
                        continue;
                    } elseif ($end_blocks > 0) {
                        for ($i = 0; $i < $end_blocks; $i++) {
                            if(!$this->_writeBlock(ARCHIVE_TAR_END_BLOCK)){
				return false;
			    }
                        }
                        $end_blocks = 0;
                    }
                    $v_binary_data = pack("a512", $v_buffer);
                    if(!$this->_writeBlock($v_binary_data)){
			return false;
		    }
                }

@bzclose($v_temp_tar);
            }

if (!@unlink($this->_tarname.".tmp")) {
                $this->_error('Error while deleting temporary file \''
				              .$this->_tarname.'.tmp\'');
            }

} else {
            // ----- For not compressed tar, just add files before the last
			//       one or two 512 bytes block
            if (!$this->_openReadWrite())
               return false;

clearstatcache();
            $v_size = filesize($this->_tarname);

// We might have zero, one or two end blocks.
            // The standard is two, but we should try to handle
            // other cases.
            fseek($this->_file, $v_size - 1024);
            if (fread($this->_file, 512) == ARCHIVE_TAR_END_BLOCK) {
                fseek($this->_file, $v_size - 1024);
            }
            elseif (fread($this->_file, 512) == ARCHIVE_TAR_END_BLOCK) {
                fseek($this->_file, $v_size - 512);
            }
        }

return true;
    }
    // }}}

// {{{ _append()
    function _append($p_filelist, $p_add_dir='', $p_remove_dir='')
    {
        if (!$this->_openAppend())
            return false;

if ($this->_addList($p_filelist, $p_add_dir, $p_remove_dir))
           $this->_writeFooter();

$this->_close();

return true;
    }
    // }}}

// {{{ _dirCheck()

/**
     * Check if a directory exists and create it (including parent
     * dirs) if not.
     *
     * @param string $p_dir directory to check
     *
     * @return bool true if the directory exists or was created
     */
    function _dirCheck($p_dir)
    {
        clearstatcache();
        if ((@is_dir($p_dir)) || ($p_dir == ''))
            return true;

$p_parent_dir = dirname($p_dir);

if (($p_parent_dir != $p_dir) &&
            ($p_parent_dir != '') &&
            (!$this->_dirCheck($p_parent_dir)))
             return false;

if (!@mkdir($p_dir, 0777)) {
            $this->_error("Unable to create directory '$p_dir'");
            return false;
        }

return true;
    }

// }}}

// {{{ _pathReduction()

/**
     * Compress path by changing for example "/dir/foo/../bar" to "/dir/bar",
     * rand emove double slashes.
     *
     * @param string $p_dir path to reduce
     *
     * @return string reduced path
     *
     * @access private
     *
     */
    function _pathReduction($p_dir)
    {
        $v_result = '';

// ----- Look for not empty path
        if ($p_dir != '') {
            // ----- Explode path by directory names
            $v_list = explode('/', $p_dir);

// ----- Study directories from last to first
            for ($i=sizeof($v_list)-1; $i>=0; $i--) {
                // ----- Look for current path
                if ($v_list[$i] == ".") {
                    // ----- Ignore this directory
                    // Should be the first $i=0, but no check is done
                }
                else if ($v_list[$i] == "..") {
                    // ----- Ignore it and ignore the $i-1
                    $i--;
                }
                else if (   ($v_list[$i] == '')
				         && ($i!=(sizeof($v_list)-1))
						 && ($i!=0)) {
                    // ----- Ignore only the double '//' in path,
                    // but not the first and last /
                } else {
                    $v_result = $v_list[$i].($i!=(sizeof($v_list)-1)?'/'
					            .$v_result:'');
                }
            }
        }
        
        if (defined('OS_WINDOWS') && OS_WINDOWS) {
            $v_result = strtr($v_result, '\\', '/');
        }
        
        return $v_result;
    }

// }}}

// {{{ _translateWinPath()
    function _translateWinPath($p_path, $p_remove_disk_letter=true)
    {
      if (defined('OS_WINDOWS') && OS_WINDOWS) {
          // ----- Look for potential disk letter
          if (   ($p_remove_disk_letter)
		      && (($v_position = strpos($p_path, ':')) != false)) {
              $p_path = substr($p_path, $v_position+1);
          }
          // ----- Change potential windows directory separator
          if ((strpos($p_path, '\\') > 0) || (substr($p_path, 0,1) == '\\')) {
              $p_path = strtr($p_path, '\\', '/');
          }
      }
      return $p_path;
    }
    // }}}
}

if (!class_exists("Archive_Tar")) {
	class Archive_Tar extends softtar {
		function __construct($p_tarname, $p_compress = null) {
			return $this->softtar($p_tarname, $p_compress);
		}
		
		function _Archive_Tar() {
			return $this->_softtar();
		}
	}
}

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