Tar.php
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Write the files as a TAR archive
*
* PHP versions 4 and 5
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330,Boston,MA 02111-1307 USA
*
* @category File Formats
* @package File_Archive
* @author Vincent Lascaux <vincentlascaux@php.net>
* @copyright 1997-2005 The PHP Group
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @version CVS: $Id: Tar.php,v 1.18 2005/06/02 12:24:43 vincentlascaux Exp $
* @link http://pear.php.net/package/File_Archive
*/
require_once "File/Archive/Writer/Archive.php";
/**
* Write the files as a TAR archive
*/
class File_Archive_Writer_Tar extends File_Archive_Writer_Archive
{
var $buffer;
var $useBuffer;
var $filename = null;
var $stats = null;
/**
* Creates the TAR header for a file
*
* @param string $filename name of the file
* @param array $stat statistics of the file
* @return string A 512 byte header for the file
* @access private
*/
function tarHeader($filename, $stat)
{
$mode = isset($stat[2]) ? $stat[2] : 0x8000;
$uid = isset($stat[4]) ? $stat[4] : 0;
$gid = isset($stat[5]) ? $stat[5] : 0;
$size = $stat[7];
$time = isset($stat[9]) ? $stat[9] : time();
$link = "";
if ($mode & 0x4000) {
$type = 5; // Directory
} else if ($mode & 0x8000) {
$type = 0; // Regular
} else if ($mode & 0xA000) {
$type = 1; // Link
$link = @readlink($current);
} else {
$type = 9; // Unknown
}
$filePrefix = '';
if (strlen($filename) > 255) {
return PEAR::raiseError(
"$filename is too long to be put in a tar archive"
);
} else if (strlen($filename) > 100) {
$filePrefix = substr($filename, 0, strlen($filename)-100);
$filename = substr($filename, -100);
}
$blockbeg = pack("a100a8a8a8a12a12",
$filename,
decoct($mode),
sprintf("%6s ",decoct($uid)),
sprintf("%6s ",decoct($gid)),
sprintf("%11s ",decoct($size)),
sprintf("%11s ",decoct($time))
);
$blockend = pack("a1a100a6a2a32a32a8a8a155a12",
$type,
$link,
"ustar",
"00",
"Unknown",
"Unknown",
"",
"",
$filePrefix,
"");
$checksum = 8*ord(" ");
for ($i = 0; $i < 148; $i++) {
$checksum += ord($blockbeg{$i});
}
for ($i = 0; $i < 356; $i++) {
$checksum += ord($blockend{$i});
}
$checksum = pack("a8",sprintf("%6s ",decoct($checksum)));
return $blockbeg . $checksum . $blockend;
}
/**
* Creates the TAR footer for a file
*
* @param int $size the size of the data that has been written to the TAR
* @return string A string made of less than 512 characteres to fill the
* last 512 byte long block
* @access private
*/
function tarFooter($size)
{
if ($size % 512 > 0) {
return pack("a".(512 - $size%512), "");
} else {
return "";
}
}
function flush()
{
if ($this->filename !== null) {
if ($this->useBuffer) {
$this->stats[7] = strlen($this->buffer);
$this->innerWriter->writeData(
$this->tarHeader($this->filename, $this->stats)
);
$this->innerWriter->writeData(
$this->buffer
);
}
$this->innerWriter->writeData(
$this->tarFooter($this->stats[7])
);
}
$this->buffer = "";
}
function newFile($filename, $stats = array(),
$mime = "application/octet-stream")
{
$this->flush();
$this->useBuffer = !isset($stats[7]);
$this->filename = $filename;
$this->stats = $stats;
if (!$this->useBuffer) {
return $this->innerWriter->writeData(
$this->tarHeader($filename, $stats)
);
}
}
/**
* @see File_Archive_Writer::close()
*/
function close()
{
$this->flush();
$this->innerWriter->writeData(pack("a1024", ""));
parent::close();
}
/**
* @see File_Archive_Writer::writeData()
*/
function writeData($data)
{
if ($this->useBuffer) {
$this->buffer .= $data;
} else {
$this->innerWriter->writeData($data);
}
}
/**
* @see File_Archive_Writer::writeFile()
*/
function writeFile($filename)
{
if ($this->useBuffer) {
$this->buffer .= file_get_contents($filename);
} else {
$this->innerWriter->writeFile($filename);
}
}
/**
* @see File_Archive_Writer::getMime()
*/
function getMime() { return "application/x-tar"; }
}
/**
* A tar archive cannot contain files with name of folders longer than 255 chars
* This filter removes them
*
* @see File_Archive_Predicate, File_Archive_Reader_Filter
*/
require_once "File/Archive/Predicate.php";
class File_Archive_Predicate_TARCompatible extends File_Archive_Predicate
{
function isTrue($source)
{
return strlen($source->getFilename()) <= 255;
}
}
?>