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File: EasyTar.class

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File: EasyTar.class
Role: Class source
Content type: text/plain
Description: manage TAR archives
Class: Easy Archives
Manage tar, gzip, bzip2 and zip archives
Author: By
Last change: Bug correction
Date: 11 years ago
Size: 7,581 bytes
 

 

Contents

Class file image Download
<?
/**-------------------------------------------------
 | 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;
    }
}
?>