/usr/share/php/Horde/Compress/Tar.php is in php-horde-compress 2.2.1-1ubuntu1.
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/**
* Copyright 2002-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Michael Cochrane <mike@graftonhall.co.nz>
* @author Michael Slusarz <slusarz@horde.org>
* @author Jan Schneider <jan@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Compress
*/
/**
* This class allows tar files to be read.
*
* @author Michael Cochrane <mike@graftonhall.co.nz>
* @author Michael Slusarz <slusarz@horde.org>
* @author Jan Schneider <jan@horde.org>
* @category Horde
* @copyright 2002-2017 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Compress
*/
class Horde_Compress_Tar extends Horde_Compress_Base
{
/**
*/
public $canCompress = true;
/**
*/
public $canDecompress = true;
/**
* Tar file types.
*
* @var array
*/
protected $_types = array(
0x0 => 'Unix file',
0x30 => 'File',
0x31 => 'Link',
0x32 => 'Symbolic link',
0x33 => 'Character special file',
0x34 => 'Block special file',
0x35 => 'Directory',
0x36 => 'FIFO special file',
0x37 => 'Contiguous file'
);
/**
* Temporary contents for compressing files.
*
* @var resource
*/
protected $_tmp;
/**
* @since Horde_Compress 2.2.0
*
* @param array $data The data to compress. Requires an array of
* arrays. Each subarray should contain these
* fields:
* - data: (string/resource) The data to compress.
* - name: (string) The pathname to the file.
* - time: (integer) [optional] The timestamp to use for the file.
* - spl: (SplFileInfo) [optional] Complete file information.
* @param array $params The parameter array.
* - stream: (boolean) If set, return a stream instead of a string.
* DEFAULT: Return string
*
* @return mixed The TAR file as either a string or a stream resource.
*/
public function compress($data, array $params = array())
{
$this->_tmp = fopen('php://temp', 'r+');
foreach ($data as $file) {
/* Split up long file names. */
$name = str_replace('\\', '/', $file['name']);
$prefix = '';
if (strlen($name) > 99) {
$prefix = $name;
$name = '';
if (strlen($prefix) > 154) {
$name = substr($prefix, 154);
$prefix = substr($prefix, 0, 154);
}
}
/* See if time/date information has been provided. */
$ftime = (isset($file['time'])) ? $file['time'] : null;
/* "Local file header" segment. */
if (is_resource($file['data'])) {
fseek($file['data'], 0, SEEK_END);
$length = ftell($file['data']);
} else {
$length = strlen($file['data']);
}
/* Gather extended information. */
if (isset($file['spl'])) {
$isLink = $file['spl']->isLink();
$link = $isLink ? $this->_getLink($file['spl']) : '';
if (function_exists('posix_getpwuid')) {
$posix = posix_getpwuid($file['spl']->getOwner());
$owner = $posix['name'];
}
if (function_exists('posix_getgrgid')) {
$posix = posix_getgrgid($file['spl']->getGroup());
$group = $posix['name'];
}
} else {
$isLink = false;
$link = $owner = $group = '';
}
/* Header data for the file entries. */
$header =
pack('a99', $name) . "\0" . /* Name. */
$this->_formatNumber($file, 'getPerms') . /* Permissions. */
$this->_formatNumber($file, 'getOwner') . /* Owner ID. */
$this->_formatNumber($file, 'getGroup') . /* Group ID. */
sprintf("%011o\0", $isLink ? 0 : $length) . /* Size. */
sprintf("%011o\0", $ftime) . /* MTime. */
' ' . /* Checksum. */
($isLink ? '1' : '0') . /* Type. */
pack('a99', $link) . "\0" . /* Link target. */
"ustar\0" . "00" . /* Magic marker. */
pack('a31', $owner) . "\0" . /* Owner name. */
pack('a31', $group) . "\0" . /* Group name. */
pack('a16', '') . /* Device numbers. */
pack('a154', $prefix) . "\0"; /* Name prefix. */
$header = pack('a512', $header);
$checksum = array_sum(array_map('ord', str_split($header)));
$header = substr($header, 0, 148)
. sprintf("%06o\0 ", $checksum)
. substr($header, 156);
/* Add this entry to TAR data. */
fwrite($this->_tmp, $header);
/* "File data" segment. */
if (is_resource($file['data'])) {
rewind($file['data']);
stream_copy_to_stream($file['data'], $this->_tmp);
} else {
fwrite($this->_tmp, $file['data']);
}
/* Add 512 byte block padding. */
fwrite($this->_tmp, str_repeat("\0", 512 - ($length % 512)));
}
/* End of archive. */
fwrite($this->_tmp, str_repeat("\0", 1024));
rewind($this->_tmp);
if (empty($params['stream'])) {
$out = stream_get_contents($this->_tmp);
fclose($this->_tmp);
return $out;
}
return $this->_tmp;
}
/**
* Returns the relative path of a symbolic link
*
* @param SplFileInfo $spl An SplFileInfo object.
*
* @return string The relative path of the symbolic link.
*/
protected function _getLink($spl)
{
$ds = DIRECTORY_SEPARATOR;
$from = explode($ds, rtrim($spl->getPathname(), $ds));
$to = explode($ds, rtrim($spl->getRealPath(), $ds));
while (count($from) && count($to) && ($from[0] == $to[0])) {
array_shift($from);
array_shift($to);
}
return str_repeat('..' . $ds, count($from)) . implode($ds, $to);
}
/**
* Formats a number from the file information for the TAR format.
*
* @param array $file A file hash from compress() that may include a
* 'spl' entry with an .
* @param string $method The method of the SplFileInfo object that returns
* the requested number.
*
* @return string The correctly formatted number.
*/
protected function _formatNumber($file, $method)
{
if (isset($file['spl'])) {
return sprintf("%07o\0", $file['spl']->$method());
}
return pack('a8', '');
}
/**
* @return array Tar file data:
* <pre>
* KEY: Position in the array
* VALUES:
* attr - File attributes
* data - Raw file contents
* date - File modification time
* name - Filename
* size - Original file size
* type - File type
* </pre>
*
* @throws Horde_Compress_Exception
*/
public function decompress($data, array $params = array())
{
$data_len = strlen($data);
$position = 0;
$return_array = array();
while ($position < $data_len) {
if (version_compare(PHP_VERSION, '5.5', '>=')) {
$info = @unpack('Z100filename/Z8mode/Z8uid/Z8gid/Z12size/Z12mtime/Z8checksum/Ctypeflag/Z100link/Z6magic/Z2version/Z32uname/Z32gname/Z8devmajor/Z8devminor', substr($data, $position));
} else {
$info = @unpack('a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/Ctypeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor', substr($data, $position));
}
if (!$info) {
throw new Horde_Compress_Exception(Horde_Compress_Translation::t("Unable to decompress data."));
}
$position += 512;
$contents = substr($data, $position, octdec($info['size']));
$position += ceil(octdec($info['size']) / 512) * 512;
if ($info['filename']) {
$file = array(
'attr' => null,
'data' => null,
'date' => octdec($info['mtime']),
'name' => trim($info['filename']),
'size' => octdec($info['size']),
'type' => isset($this->_types[$info['typeflag']]) ? $this->_types[$info['typeflag']] : null
);
if (($info['typeflag'] == 0) ||
($info['typeflag'] == 0x30) ||
($info['typeflag'] == 0x35)) {
/* File or folder. */
$file['data'] = $contents;
$mode = hexdec(substr($info['mode'], 4, 3));
$file['attr'] =
(($info['typeflag'] == 0x35) ? 'd' : '-') .
(($mode & 0x400) ? 'r' : '-') .
(($mode & 0x200) ? 'w' : '-') .
(($mode & 0x100) ? 'x' : '-') .
(($mode & 0x040) ? 'r' : '-') .
(($mode & 0x020) ? 'w' : '-') .
(($mode & 0x010) ? 'x' : '-') .
(($mode & 0x004) ? 'r' : '-') .
(($mode & 0x002) ? 'w' : '-') .
(($mode & 0x001) ? 'x' : '-');
}
$return_array[] = $file;
}
}
return $return_array;
}
}
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