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sources/3rdparty/getid3/module.archive.tar.php 6.56 KB
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  <?php
  /////////////////////////////////////////////////////////////////
  /// getID3() by James Heinrich <info@getid3.org>               //
  //  available at http://getid3.sourceforge.net                 //
  //            or http://www.getid3.org                         //
  /////////////////////////////////////////////////////////////////
  // See readme.txt for more details                             //
  /////////////////////////////////////////////////////////////////
  //                                                             //
  // module.archive.tar.php                                      //
  // module for analyzing TAR files                              //
  // dependencies: NONE                                          //
  //                                                            ///
  /////////////////////////////////////////////////////////////////
  //                                                             //
  // Module originally written by                                //
  //      Mike Mozolin <teddybearØmail*ru>                       //
  //                                                             //
  /////////////////////////////////////////////////////////////////
  
  
  class getid3_tar extends getid3_handler
  {
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  	public function Analyze() {
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  		$info = &$this->getid3->info;
  
  		$info['fileformat'] = 'tar';
  		$info['tar']['files'] = array();
  
  		$unpack_header = 'a100fname/a8mode/a8uid/a8gid/a12size/a12mtime/a8chksum/a1typflag/a100lnkname/a6magic/a2ver/a32uname/a32gname/a8devmaj/a8devmin/a155prefix';
  		$null_512k = str_repeat("\x00", 512); // end-of-file marker
  
  		fseek($this->getid3->fp, 0);
  		while (!feof($this->getid3->fp)) {
  			$buffer = fread($this->getid3->fp, 512);
  			if (strlen($buffer) < 512) {
  				break;
  			}
  
  			// check the block
  			$checksum = 0;
  			for ($i = 0; $i < 148; $i++) {
  				$checksum += ord($buffer{$i});
  			}
  			for ($i = 148; $i < 156; $i++) {
  				$checksum += ord(' ');
  			}
  			for ($i = 156; $i < 512; $i++) {
  				$checksum += ord($buffer{$i});
  			}
  			$attr    = unpack($unpack_header, $buffer);
  			$name    =       (isset($attr['fname']  ) ? trim($attr['fname']  ) : '');
  			$mode    = octdec(isset($attr['mode']   ) ? trim($attr['mode']   ) : '');
  			$uid     = octdec(isset($attr['uid']    ) ? trim($attr['uid']    ) : '');
  			$gid     = octdec(isset($attr['gid']    ) ? trim($attr['gid']    ) : '');
  			$size    = octdec(isset($attr['size']   ) ? trim($attr['size']   ) : '');
  			$mtime   = octdec(isset($attr['mtime']  ) ? trim($attr['mtime']  ) : '');
  			$chksum  = octdec(isset($attr['chksum'] ) ? trim($attr['chksum'] ) : '');
  			$typflag =       (isset($attr['typflag']) ? trim($attr['typflag']) : '');
  			$lnkname =       (isset($attr['lnkname']) ? trim($attr['lnkname']) : '');
  			$magic   =       (isset($attr['magic']  ) ? trim($attr['magic']  ) : '');
  			$ver     =       (isset($attr['ver']    ) ? trim($attr['ver']    ) : '');
  			$uname   =       (isset($attr['uname']  ) ? trim($attr['uname']  ) : '');
  			$gname   =       (isset($attr['gname']  ) ? trim($attr['gname']  ) : '');
  			$devmaj  = octdec(isset($attr['devmaj'] ) ? trim($attr['devmaj'] ) : '');
  			$devmin  = octdec(isset($attr['devmin'] ) ? trim($attr['devmin'] ) : '');
  			$prefix  =       (isset($attr['prefix'] ) ? trim($attr['prefix'] ) : '');
  			if (($checksum == 256) && ($chksum == 0)) {
  				// EOF Found
  				break;
  			}
  			if ($prefix) {
  				$name = $prefix.'/'.$name;
  			}
  			if ((preg_match('#/$#', $name)) && !$name) {
  				$typeflag = 5;
  			}
  			if ($buffer == $null_512k) {
  				// it's the end of the tar-file...
  				break;
  			}
  
  			// Read to the next chunk
  			fseek($this->getid3->fp, $size, SEEK_CUR);
  
  			$diff = $size % 512;
  			if ($diff != 0) {
  				// Padding, throw away
  				fseek($this->getid3->fp, (512 - $diff), SEEK_CUR);
  			}
  			// Protect against tar-files with garbage at the end
  			if ($name == '') {
  				break;
  			}
  			$info['tar']['file_details'][$name] = array (
  				'name'     => $name,
  				'mode_raw' => $mode,
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  				'mode'     => self::display_perms($mode),
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  				'uid'      => $uid,
  				'gid'      => $gid,
  				'size'     => $size,
  				'mtime'    => $mtime,
  				'chksum'   => $chksum,
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  				'typeflag' => self::get_flag_type($typflag),
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  				'linkname' => $lnkname,
  				'magic'    => $magic,
  				'version'  => $ver,
  				'uname'    => $uname,
  				'gname'    => $gname,
  				'devmajor' => $devmaj,
  				'devminor' => $devmin
  			);
  			$info['tar']['files'] = getid3_lib::array_merge_clobber($info['tar']['files'], getid3_lib::CreateDeepArray($info['tar']['file_details'][$name]['name'], '/', $size));
  		}
  		return true;
  	}
  
  	// Parses the file mode to file permissions
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  	public function display_perms($mode) {
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  		// Determine Type
  		if     ($mode & 0x1000) $type='p'; // FIFO pipe
  		elseif ($mode & 0x2000) $type='c'; // Character special
  		elseif ($mode & 0x4000) $type='d'; // Directory
  		elseif ($mode & 0x6000) $type='b'; // Block special
  		elseif ($mode & 0x8000) $type='-'; // Regular
  		elseif ($mode & 0xA000) $type='l'; // Symbolic Link
  		elseif ($mode & 0xC000) $type='s'; // Socket
  		else                    $type='u'; // UNKNOWN
  
  		// Determine permissions
  		$owner['read']    = (($mode & 00400) ? 'r' : '-');
  		$owner['write']   = (($mode & 00200) ? 'w' : '-');
  		$owner['execute'] = (($mode & 00100) ? 'x' : '-');
  		$group['read']    = (($mode & 00040) ? 'r' : '-');
  		$group['write']   = (($mode & 00020) ? 'w' : '-');
  		$group['execute'] = (($mode & 00010) ? 'x' : '-');
  		$world['read']    = (($mode & 00004) ? 'r' : '-');
  		$world['write']   = (($mode & 00002) ? 'w' : '-');
  		$world['execute'] = (($mode & 00001) ? 'x' : '-');
  
  		// Adjust for SUID, SGID and sticky bit
  		if ($mode & 0x800) $owner['execute'] = ($owner['execute'] == 'x') ? 's' : 'S';
  		if ($mode & 0x400) $group['execute'] = ($group['execute'] == 'x') ? 's' : 'S';
  		if ($mode & 0x200) $world['execute'] = ($world['execute'] == 'x') ? 't' : 'T';
  
  		$s  = sprintf('%1s', $type);
  		$s .= sprintf('%1s%1s%1s',      $owner['read'], $owner['write'], $owner['execute']);
  		$s .= sprintf('%1s%1s%1s',      $group['read'], $group['write'], $group['execute']);
  		$s .= sprintf('%1s%1s%1s'."
  ", $world['read'], $world['write'], $world['execute']);
  		return $s;
  	}
  
  	// Converts the file type
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  	public function get_flag_type($typflag) {
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  		static $flag_types = array(
  			'0' => 'LF_NORMAL',
  			'1' => 'LF_LINK',
  			'2' => 'LF_SYNLINK',
  			'3' => 'LF_CHR',
  			'4' => 'LF_BLK',
  			'5' => 'LF_DIR',
  			'6' => 'LF_FIFO',
  			'7' => 'LF_CONFIG',
  			'D' => 'LF_DUMPDIR',
  			'K' => 'LF_LONGLINK',
  			'L' => 'LF_LONGNAME',
  			'M' => 'LF_MULTIVOL',
  			'N' => 'LF_NAMES',
  			'S' => 'LF_SPARSE',
  			'V' => 'LF_VOLHDR'
  		);
  		return (isset($flag_types[$typflag]) ? $flag_types[$typflag] : '');
  	}
  
  }