<?
/**-------------------------------------------------
| EasyTar.class V0.8 - by Alban LOPEZ
| Copyright (c) 2007 Alban LOPEZ
| Email bugs/suggestions to alban.lopez+easytar@gmail.com
+--------------------------------------------------
| This file is part of EasyArchive.class V0.9.
| EasyArchive is free software: you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation, either version 3 of the License, or
| (at your option) any later version.
| EasyArchive 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 General Public License for more details on http://www.gnu.org/licenses/
+--------------------------------------------------
http://www.phpclasses.org/browse/package/4239.html **/
class tar
{ /* http://www.mkssoftware.com/docs/man4/tar.4.asp */
/**
// You can use this class like that.
$test = new tar;
$test->makeTar('./','./toto.Tar');
var_export($test->infosTar('./toto.Tar'));
$test->extractTar('./toto.Tar', './new/');
**/
function infosTar ($src, $data=true)
{
if ($this->is_tar($src))
{
file_put_contents ($tmp='~tmp('.microtime().').tar', $src);
$src = $tmp;
}
$ptr = fopen($src, 'r');
while (!feof($ptr))
{
$infos = $this->readTarHeader ($ptr);
if ($infos['name'])
{
if (!$data) unset($infos['data']);
$result[$infos['name']]=$infos;
}
}
if (is_file($tmp)) unlink($tmp);
return $result;
}
function makeTar($src, $dest=false)
{
$src = is_array($src) ? $src : array($src);
$src = array_map('realpath', $src);
foreach ($src as $item)
$Tar .= $this->addTarItem($item.((is_dir($item) && substr($item, -1)!='/')?'/':''), dirname($item).'/');
$Tar = str_pad($Tar, floor((strlen($Tar) + 10240 - 1) / 10240) * 10240, "\0");
if (empty($dest)) return $Tar;
elseif (file_put_contents($dest, $Tar)) return $dest;
else false;
}
function extractTar ($src, $dest)
{
if ($this->is_tar($src))
{
file_put_contents ($tmp='~tmp('.microtime().').tar', $src);
$src = $tmp;
}
$ptr = fopen($src, 'r');
while (!feof($ptr))
{
$infos = $this->readTarHeader ($ptr);
if ($infos['type']=='5' && @mkdir($dest.$infos['name'], 0775, true))
$result[]=$dest.$infos['name'];
elseif (($infos['type']=='0' || $infos['type']==chr(0)) && file_put_contents($dest.$infos['name'], $infos['data']))
$result[]=$dest.$infos['name'];
if ($infos)
chmod($dest.$infos['name'], 0775);
// chmod(, $infos['mode']);
// chgrp(, $infos['uname']);
// chown(, $infos['gname']);
}
if (is_file($tmp)) unlink($tmp);
return $result;
}
function is_tar($str)
{
$block = substr($str,0, 512);
if (strlen($block)!=512) return false;
$realchecksum = octdec(substr($str,148,8));
$checksum = 0;
$block = substr_replace($block, ' ', 148, 8);
for ($i = 0; $i < 512; $i++)
$checksum += ord(substr($block, $i, 1));
if ($realchecksum==$checksum) return true;
return false;
}
function tarHeader512($infos)
{ /* http://www.mkssoftware.com/docs/man4/tar.4.asp */
$bigheader = $header = '';
if (strlen($infos['name100'])>100)
{
$bigheader = pack("a100a8a8a8a12a12a8a1a100a6a2a32a32a8a8a155a12",
'././@LongLink','0000000','0000000','0000000',
sprintf("%011o", strlen($infos['name100'])),'00000000000',
' ', 'L', '', 'ustar ', '0',
$infos['userName32'],
$infos['groupName32'],'','','','');
$bigheader .= str_pad($infos['name100'], floor((strlen($infos['name100']) + 512 - 1) / 512) * 512, "\0");
$checksum = 0;
for ($i = 0; $i < 512; $i++)
$checksum += ord(substr($bigheader, $i, 1));
$bigheader = substr_replace($bigheader, sprintf("%06o", $checksum)."\0 ", 148, 8);
}
$header = pack("a100a8a8a8a12a12a8a1a100a6a2a32a32a8a8a155a12", // book the memorie area
substr($infos['name100'],0,100), // 0 100 File name
str_pad(substr(sprintf("%07o",$infos['mode8']),-4), 7, '0', STR_PAD_LEFT), // 100 8 File mode
sprintf("%07o", $infos['uid8']), // 108 8 Owner user ID
sprintf("%07o", $infos['gid8']), // 116 8 Group user ID
sprintf("%011o", $infos['size12']), // 124 12 File size in bytes
sprintf("%011o", $infos['mtime12']), // 136 12 Last modification time
' ', // 148 8 Check sum for header block
$infos['link1'], // 156 1 Link indicator / ustar Type flag
$infos['link100'], // 157 100 Name of linked file
'ustar ', // 257 6 USTAR indicator "ustar"
' ', // 263 2 USTAR version "00"
$infos['userName32'], // 265 32 Owner user name
$infos['groupName32'], // 297 32 Owner group name
'', // 329 8 Device major number
'', // 337 8 Device minor number
$infos['prefix155'], // 345 155 Filename prefix
''); // 500 12 ??
$checksum = 0;
for ($i = 0; $i < 512; $i++)
$checksum += ord(substr($header, $i, 1));
$header = substr_replace($header, sprintf("%06o", $checksum)."\0 ", 148, 8);
return $bigheader.$header;
}
function addTarItem ($item, $racine)
{
$infos['name100'] = str_replace($racine, '', $item);
list (, , $infos['mode8'], , $infos['uid8'], $infos['gid8'], , , , $infos['mtime12'] ) = stat($item);
$infos['size12'] = is_dir($item) ? 0 : filesize($item);
$infos['link1'] = is_link($item) ? 2 : is_dir ($item) ? 5 : 0;
$infos['link100'] == 2 ? readlink($item) : "";
$a=function_exists('posix_getpwuid')?posix_getpwuid (fileowner($item)):array('name'=>'Unknown');
$infos['userName32'] = $a['name'];
$a=function_exists('posix_getgrgid')?posix_getgrgid (filegroup($item)):array('name'=>'Unknown');
$infos['groupName32'] = $a['name'];
$infos['prefix155'] = '';
$header = $this->tarHeader512($infos);
$data = str_pad(file_get_contents($item), floor(($infos['size12'] + 512 - 1) / 512) * 512, "\0");
if (is_dir($item))
{
$lst = scandir($item);
array_shift($lst); // remove ./ of $lst
array_shift($lst); // remove ../ of $lst
foreach ($lst as $subitem)
$sub .= $this->addTarItem($item.$subitem.(is_dir($item.$subitem)?'/':''), $racine);
}
return $header.$data.$sub;
}
function readTarHeader ($ptr)
{
$block = fread($ptr, 512);
if (strlen($block)!=512) return false;
$hdr = unpack ("a100name/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1type/a100symlink/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor/a155prefix/a12temp", $block);
$hdr['mode']=$hdr['mode']+0;
$hdr['uid']=octdec($hdr['uid']);
$hdr['gid']=octdec($hdr['gid']);
$hdr['size']=octdec($hdr['size']);
$hdr['mtime']=octdec($hdr['mtime']);
$hdr['checksum']=octdec($hdr['checksum']);
$checksum = 0;
$block = substr_replace($block, ' ', 148, 8);
for ($i = 0; $i < 512; $i++)
$checksum += ord(substr($block, $i, 1));
if (isset($hdr['name']) && $hdr['checksum']==$checksum)
{
if ($hdr['name']=='././@LongLink' && $hdr['type']=='L')
{
$realName = substr(fread($ptr, floor(($hdr['size'] + 512 - 1) / 512) * 512), 0, $hdr['size']-1);
$hdr2 = $this->readTarHeader ($ptr);
$hdr2['name'] = $realName;
return $hdr2;
}
elseif (strtolower(substr($hdr['magic'], 0, 5) == 'ustar'))
{
if ($hdr['size']>0)
$hdr['data'] = substr(fread($ptr, floor(($hdr['size'] + 512 - 1) / 512) * 512), 0, $hdr['size']);
else $hdr['data'] = '';
return $hdr;
}
else return false;
}
else return false;
}
}
?>
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