Mercurial > judyates

     1 <?php

     2 // +----------------------------------------------------------------------+

     3 // | PHP version 5                                                        |

     4 // +----------------------------------------------------------------------+

     5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |

     6 // +----------------------------------------------------------------------+

     7 // | This source file is subject to version 2 of the GPL license,         |

     8 // | that is bundled with this package in the file license.txt and is     |

     9 // | available through the world-wide-web at the following url:           |

    10 // | http://www.gnu.org/copyleft/gpl.html                                 |

    11 // +----------------------------------------------------------------------+

    12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |

    13 // +----------------------------------------------------------------------+

    14 // | Authors: James Heinrich <infoØgetid3*org>                            |

    15 // |          Allan Hansen <ahØartemis*dk>                                |

    16 // +----------------------------------------------------------------------+

    17 // | module.archive.tar.php                                               |

    18 // | module for analyzing TAR files                                       |

    19 // | dependencies: NONE                                                   |

    20 // +----------------------------------------------------------------------+

    21 // | Module originally written by Mike Mozolin <teddybearØmail*ru>        |

    22 // +----------------------------------------------------------------------+

    23 //

    24 // $Id: module.archive.tar.php,v 1.2 2006/11/02 10:48:00 ah Exp $

    25 

    26         

    27         

    28 class getid3_tar extends getid3_handler

    29 {

    30 

    31     function Analyze() {

    32 

    33         $info = &$this->getid3->info;

    34 

    35         $info['fileformat'] = 'tar';

    36 

    37         $fp = $this->getid3->fp;

    38         

    39         fseek($fp, 0);

    40         

    41         $unpack_header = 'a100fname/a8mode/a8uid/a8gid/a12size/a12mtime/a8chksum/a1typflag/a100lnkname/a6magic/a2ver/a32uname/a32gname/a8devmaj/a8devmin/a155/prefix';

    42 

    43         $null_512k = str_repeat("\0", 512); // end-of-file marker

    44 

    45         $already_warned = false;

    46 

    47         while (!feof($fp)) {

    48             

    49             $buffer = fread($fp, 512);

    50             

    51             // check the block

    52             $checksum = 0;

    53             for ($i = 0; $i < 148; $i++) {

    54                 $checksum += ord(substr($buffer, $i, 1));

    55             }

    56             for ($i = 148; $i < 156; $i++) {

    57                 $checksum += ord(' ');

    58             }

    59             for ($i = 156; $i < 512; $i++) {

    60                 $checksum += ord(substr($buffer, $i, 1));

    61             }

    62             $attr    = unpack($unpack_header, $buffer);

    63             $name    =        trim(@$attr['fname']);

    64             $mode    = octdec(trim(@$attr['mode']));

    65             $uid     = octdec(trim(@$attr['uid']));

    66             $gid     = octdec(trim(@$attr['gid']));

    67             $size    = octdec(trim(@$attr['size']));

    68             $mtime   = octdec(trim(@$attr['mtime']));

    69             $chksum  = octdec(trim(@$attr['chksum']));

    70             $typflag =        trim(@$attr['typflag']);

    71             $lnkname =        trim(@$attr['lnkname']);

    72             $magic   =        trim(@$attr['magic']);

    73             $ver     =        trim(@$attr['ver']);

    74             $uname   =        trim(@$attr['uname']);

    75             $gname   =        trim(@$attr['gname']);

    76             $devmaj  = octdec(trim(@$attr['devmaj']));

    77             $devmin  = octdec(trim(@$attr['devmin']));

    78             $prefix  =        trim(@$attr['prefix']);

    79 

    80             // EOF Found

    81             if (($checksum == 256) && ($chksum == 0)) {

    82                 break;

    83             }

    84 

    85             // Check if filename if 7bit as spec requires

    86             if (!$already_warned) {

    87                 for ($i = 0; $i < strlen($name); $i++) {

    88                     if ($name{$i} < chr(32) || $name{$i} > chr(127)) {

    89                         $this->getid3->warning('Some filenames contains extended characters, which breaks the tar specifation. This is not uncommon, but you will have to handle the character encoding for filenames yourself.');

    90                         $already_warned = true;

    91                         break;

    92                     }

    93                 }

    94             }

    95             

    96             if ($prefix) {

    97                 $name = $prefix.'/'.$name;

    98             }

    99             if ((preg_match('#/$#', $name)) && !$name) {

   100                 $typeflag = 5;

   101             }

   102             

   103             // If it's the end of the tar-file...

   104             if ($buffer == $null_512k) {

   105                 break;

   106             }

   107             

   108             // Protect against tar-files with garbage at the end

   109             if ($name == '') {

   110                 break;

   111             }

   112             

   113             $info['tar']['file_details'][$name] = array (

   114                 'name'     => $name,

   115                 'mode_raw' => $mode,

   116                 'mode'     => getid3_tar::display_perms($mode),

   117                 'uid'      => $uid,

   118                 'gid'      => $gid,

   119                 'size'     => $size,

   120                 'mtime'    => $mtime,

   121                 'chksum'   => $chksum,

   122                 'typeflag' => getid3_tar::get_flag_type($typflag),

   123                 'linkname' => $lnkname,

   124                 'magic'    => $magic,

   125                 'version'  => $ver,

   126                 'uname'    => $uname,

   127                 'gname'    => $gname,

   128                 'devmajor' => $devmaj,

   129                 'devminor' => $devmin

   130             );

   131             

   132             // Skip the next chunk

   133             fseek($fp, $size, SEEK_CUR);

   134 

   135             // Throw away padding

   136             if ($size % 512) {

   137                 fseek($fp, 512 - $diff, SEEK_CUR);

   138             }

   139             

   140         }

   141         return true;

   142     }

   143 

   144 

   145     // Parses the file mode to file permissions

   146     public static function display_perms($mode) {

   147 

   148         // Determine Type

   149         if ($mode & 0x1000) {

   150             $type='p'; // FIFO pipe

   151         }

   152         elseif ($mode & 0x2000) {

   153             $type='c'; // Character special

   154         }

   155         elseif ($mode & 0x4000) {

   156             $type='d'; // Directory

   157         }

   158         elseif ($mode & 0x6000) {

   159             $type='b'; // Block special

   160         }

   161         elseif ($mode & 0x8000) {

   162             $type='-'; // Regular

   163         }

   164         elseif ($mode & 0xA000) {

   165             $type='l'; // Symbolic Link

   166         }

   167         elseif ($mode & 0xC000) {

   168             $type='s'; // Socket

   169         }

   170         else {

   171             $type='u'; // UNKNOWN

   172         }

   173 

   174         // Determine permissions

   175         $owner['read']    = (($mode & 00400) ? 'r' : '-');

   176         $owner['write']   = (($mode & 00200) ? 'w' : '-');

   177         $owner['execute'] = (($mode & 00100) ? 'x' : '-');

   178         $group['read']    = (($mode & 00040) ? 'r' : '-');

   179         $group['write']   = (($mode & 00020) ? 'w' : '-');

   180         $group['execute'] = (($mode & 00010) ? 'x' : '-');

   181         $world['read']    = (($mode & 00004) ? 'r' : '-');

   182         $world['write']   = (($mode & 00002) ? 'w' : '-');

   183         $world['execute'] = (($mode & 00001) ? 'x' : '-');

   184 

   185         // Adjust for SUID, SGID and sticky bit

   186         if ($mode & 0x800) {

   187             $owner['execute'] = ($owner['execute'] == 'x') ? 's' : 'S';

   188         }

   189         if ($mode & 0x400) {

   190             $group['execute'] = ($group['execute'] == 'x') ? 's' : 'S';

   191         }

   192         if ($mode & 0x200) {

   193             $world['execute'] = ($world['execute'] == 'x') ? 't' : 'T';

   194         }

   195 

   196         $s  = sprintf('%1s', $type);

   197         $s .= sprintf('%1s%1s%1s',      $owner['read'], $owner['write'], $owner['execute']);

   198         $s .= sprintf('%1s%1s%1s',      $group['read'], $group['write'], $group['execute']);

   199         $s .= sprintf('%1s%1s%1s'."\n", $world['read'], $world['write'], $world['execute']);

   200 

   201         return $s;

   202     }

   203 

   204 

   205     // Converts the file type

   206     public static function get_flag_type($typflag) {

   207 

   208         static $flag_types = array (

   209             '0' => 'LF_NORMAL',

   210             '1' => 'LF_LINK',

   211             '2' => 'LF_SYNLINK',

   212             '3' => 'LF_CHR',

   213             '4' => 'LF_BLK',

   214             '5' => 'LF_DIR',

   215             '6' => 'LF_FIFO',

   216             '7' => 'LF_CONFIG',

   217             'D' => 'LF_DUMPDIR',

   218             'K' => 'LF_LONGLINK',

   219             'L' => 'LF_LONGNAME',

   220             'M' => 'LF_MULTIVOL',

   221             'N' => 'LF_NAMES',

   222             'S' => 'LF_SPARSE',

   223             'V' => 'LF_VOLHDR'

   224         );

   225 

   226         return @$flag_types[$typflag];

   227     }

   228     

   229 }

   230 

   231 ?>
author	Robert McIntyre <rlm@mit.edu>
date	Tue, 22 Jun 2010 13:41:04 -0400
parents	3f6b44aa6b35
children