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big-moving.ru/api/soft/fm/libraries/Tar.php

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2022-06-24 15:29:23 +05:00
<?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 1997-2008 The Authors
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @version CVS: $ Id: Tar.php,v 1.43 2008/10/30 17:58:42 dufuz Exp $
* @link http://pear.php.net/package/Archive_Tar
*/
if( !class_exists('PEAR')) {
require_once 'PEAR.php';
}
define ('ARCHIVE_TAR_ATT_SEPARATOR', 90001);
define ('ARCHIVE_TAR_END_BLOCK', pack("a512", ''));
/**
* Creates a (compressed) Tar archive
*
* @author Vincent Blavet <vincent@phpconcept.net>
* @version $Revision: 157 $
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @package Archive_Tar
*/
class Archive_Tar extends PEAR
{
/**
* @var string Name of the Tar
*/
var $_tarname='';
/**
* @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='';
// {{{ 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 $p_compress can be null, 'gz' or 'bz2'. This
* parameter indicates if gzip or bz2 compression
* is required. For compatibility reason the
* boolean value 'true' means 'gz'.
* @access public
*/
function Archive_Tar($p_tarname, $p_compress = null)
{
$this->PEAR();
$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;
$this->_compress_type = 'bz2';
} else {
die("Unsupported compression type '$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)) {
die("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 _Archive_Tar()
{
$this->_close();
// ----- Look for a local copy to delete
if ($this->_temp_tarname != '')
@unlink($this->_temp_tarname);
$this->_PEAR();
}
// }}}
// {{{ 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='')
{
return $this->extractModify($p_path, '');
}
// }}}
// {{{ 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 $p_remove_path Part of the memorized path that can be
* removed if present at the beginning of
* the file/dir path.
* @return boolean true on success, false on error.
* @access public
* @see extractList()
*/
function extractModify($p_path, $p_remove_path)
{
$v_result = true;
$v_list_detail = array();
if ($v_result = $this->_openRead()) {
$v_result = $this->_extractList($p_path, $v_list_detail,
"complete", 0, $p_remove_path);
$this->_close();
}
return $v_result;
}
// }}}
// {{{ 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 $p_remove_path Part of the memorized path that can be
* removed if present at the beginning of
* the file/dir path.
* @return true on success, false on error.
* @access public
* @see extractModify()
*/
function extractList($p_filelist, $p_path='', $p_remove_path='')
{
$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 {
$this->_error('Invalid string list');
return false;
}
if ($v_result = $this->_openRead()) {
$v_result = $this->_extractList($p_path, $v_list_detail, "partial",
$v_list, $p_remove_path);
$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 $v_result;
}
// }}}
// {{{ _error()
function _error($p_message)
{
// ----- To be completed
$this->raiseError($p_message);
}
// }}}
// {{{ _warning()
function _warning($p_message)
{
// ----- To be completed
$this->raiseError($p_message);
}
// }}}
// {{{ _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')
$this->_file = @gzopen($this->_tarname, "wb9");
else if ($this->_compress_type == 'bz2')
$this->_file = @bzopen($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, $p_len=null)
{
if (is_resource($this->_file)) {
if ($p_len === null) {
if ($this->_compress_type == 'gz')
@gzputs($this->_file, $p_binary_data);
else if ($this->_compress_type == 'bz2')
@bzwrite($this->_file, $p_binary_data);
else if ($this->_compress_type == 'none')
@fputs($this->_file, $p_binary_data);
else
$this->_error('Unknown or missing compression type ('
.$this->_compress_type.')');
} else {
if ($this->_compress_type == 'gz')
@gzputs($this->_file, $p_binary_data, $p_len);
else if ($this->_compress_type == 'bz2')
@bzwrite($this->_file, $p_binary_data, $p_len);
else if ($this->_compress_type == 'none')
@fputs($this->_file, $p_binary_data, $p_len);
else
$this->_error('Unknown or missing compression type ('
.$this->_compress_type.')');
}
}
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')
$v_block = @fread($this->_file, 512);
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($this->_file, ftell($this->_file)+($p_len*512));
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', '');
$this->_writeBlock($v_binary_data);
}
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;
if (!file_exists($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;
}
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, $p_remove_dir) == 0) {
return true;
}
if ($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");
$this->_writeBlock($v_binary_data);
}
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);
$this->_writeBlock($v_binary_data);
}
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);
if (strlen($v_reduce_filename) > 99) {
if (!$this->_writeLongHeader($v_reduce_filename))
return false;
}
$v_info = lstat($p_filename);
$v_uid = sprintf("%6s ", DecOct($v_info[4]));
$v_gid = sprintf("%6s ", DecOct($v_info[5]));
$v_perms = sprintf("%6s ", DecOct($v_info['mode']));
$v_mtime = sprintf("%11s", DecOct($v_info['mode']));
$v_linkname = '';
if (@is_link($p_filename)) {
$v_typeflag = '2';
$v_linkname = readlink($p_filename);
$v_size = sprintf("%11s ", DecOct(0));
} elseif (@is_dir($p_filename)) {
$v_typeflag = "5";
$v_size = sprintf("%11s ", DecOct(0));
} else {
$v_typeflag = '';
clearstatcache();
$v_size = sprintf("%11s ", DecOct($v_info['size']));
}
$v_magic = '';
$v_version = '';
$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
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%6s ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
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("%11s ", DecOct(0));
} else {
$v_size = sprintf("%11s ", DecOct($p_size));
}
$v_uid = sprintf("%6s ", DecOct($p_uid));
$v_gid = sprintf("%6s ", DecOct($p_gid));
$v_perms = sprintf("%6s ", DecOct($p_perms));
$v_mtime = sprintf("%11s", DecOct($p_mtime));
$v_linkname = '';
$v_magic = '';
$v_version = '';
$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, '');
// ----- 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
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%6s ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
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, '');
// ----- 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
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%6s ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
// ----- 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");
$this->_writeBlock($v_binary_data);
}
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));
$v_data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/"
."a8checksum/a1typeflag/a100link/a6magic/a2version/"
."a32uname/a32gname/a8devmajor/a8devminor",
$v_binary_data);
// ----- 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;
$this->_error('Invalid checksum for file "'.$v_data['filename']
.'" : '.$v_checksum.' calculated, '
.$v_header['checksum'].' expected');
return false;
}
// ----- Extract the properties
$v_header['filename'] = trim($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 .= $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)
{
$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'])) {
$this->_error('File '.$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($v_header['filename']);
}
if (!@symlink($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($v_dest_file);
// ----- Change the file mode, mtime
@touch($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'], $mode);
}
}
// ----- Check the file size
clearstatcache();
if (filesize($v_header['filename']) != $v_header['size']) {
$this->_error('Extracted file '.$v_header['filename']
.' does not have the correct file size \''
.filesize($v_header['filename'])
.'\' ('.$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 = '/';
$p_list_detail[$v_nb++] = $v_header;
if (is_array($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') {
while (!@gzeof($v_temp_tar)) {
$v_buffer = @gzread($v_temp_tar, 512);
if ($v_buffer == ARCHIVE_TAR_END_BLOCK) {
// do not copy end blocks, we will re-make them
// after appending
continue;
}
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
@gzclose($v_temp_tar);
}
elseif ($this->_compress_type == 'bz2') {
while (strlen($v_buffer = @bzread($v_temp_tar, 512)) > 0) {
if ($v_buffer == ARCHIVE_TAR_END_BLOCK) {
continue;
}
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
@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:'');
}
}
}
$v_result = strtr($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;
}
// }}}
}
?>