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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
// +----------------------------------------------------------------------+
// | PHP version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2 of the GPL license, |
// | that is bundled with this package in the file license.txt and is |
// | available through the world-wide-web at the following url: |
// | http://www.gnu.org/copyleft/gpl.html |
// +----------------------------------------------------------------------+
// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
// +----------------------------------------------------------------------+
// | Authors: James Heinrich <info�getid3*org> |
// | Allan Hansen <ah�artemis*dk> |
// +----------------------------------------------------------------------+
// | module.archive.tar.php |
// | module for analyzing TAR files |
// | dependencies: NONE |
// +----------------------------------------------------------------------+
// | Module originally written by Mike Mozolin <teddybear�mail*ru> |
// +----------------------------------------------------------------------+
//
// $Id: module.archive.tar.php,v 1.2 2006/11/02 10:48:00 ah Exp $
class getid3_tar extends getid3_handler
{
function Analyze() {
$info = &$this->getid3->info;
$info['fileformat'] = 'tar';
$fp = $this->getid3->fp;
fseek($fp, 0);
$unpack_header = 'a100fname/a8mode/a8uid/a8gid/a12size/a12mtime/a8chksum/a1typflag/a100lnkname/a6magic/a2ver/a32uname/a32gname/a8devmaj/a8devmin/a155/prefix';
$null_512k = str_repeat("\0", 512); // end-of-file marker
$already_warned = false;
while (!feof($fp)) {
$buffer = fread($fp, 512);
// check the block
$checksum = 0;
for ($i = 0; $i < 148; $i++) {
$checksum += ord(substr($buffer, $i, 1));
}
for ($i = 148; $i < 156; $i++) {
$checksum += ord(' ');
}
for ($i = 156; $i < 512; $i++) {
$checksum += ord(substr($buffer, $i, 1));
}
$attr = unpack($unpack_header, $buffer);
$name = trim(@$attr['fname']);
$mode = octdec(trim(@$attr['mode']));
$uid = octdec(trim(@$attr['uid']));
$gid = octdec(trim(@$attr['gid']));
$size = octdec(trim(@$attr['size']));
$mtime = octdec(trim(@$attr['mtime']));
$chksum = octdec(trim(@$attr['chksum']));
$typflag = trim(@$attr['typflag']);
$lnkname = trim(@$attr['lnkname']);
$magic = trim(@$attr['magic']);
$ver = trim(@$attr['ver']);
$uname = trim(@$attr['uname']);
$gname = trim(@$attr['gname']);
$devmaj = octdec(trim(@$attr['devmaj']));
$devmin = octdec(trim(@$attr['devmin']));
$prefix = trim(@$attr['prefix']);
// EOF Found
if (($checksum == 256) && ($chksum == 0)) {
break;
}
// Check if filename if 7bit as spec requires
if (!$already_warned) {
for ($i = 0; $i < strlen($name); $i++) {
if ($name{$i} < chr(32) || $name{$i} > chr(127)) {
$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.');
$already_warned = true;
break;
}
}
}
if ($prefix) {
$name = $prefix.'/'.$name;
}
if ((preg_match('#/$#', $name)) && !$name) {
$typeflag = 5;
}
// If it's the end of the tar-file...
if ($buffer == $null_512k) {
break;
}
// Protect against tar-files with garbage at the end
if ($name == '') {
break;
}
$info['tar']['file_details'][$name] = array (
'name' => $name,
'mode_raw' => $mode,
'mode' => getid3_tar::display_perms($mode),
'uid' => $uid,
'gid' => $gid,
'size' => $size,
'mtime' => $mtime,
'chksum' => $chksum,
'typeflag' => getid3_tar::get_flag_type($typflag),
'linkname' => $lnkname,
'magic' => $magic,
'version' => $ver,
'uname' => $uname,
'gname' => $gname,
'devmajor' => $devmaj,
'devminor' => $devmin
);
// Skip the next chunk
fseek($fp, $size, SEEK_CUR);
// Throw away padding
if ($size % 512) {
fseek($fp, 512 - $diff, SEEK_CUR);
}
}
return true;
}
// Parses the file mode to file permissions
public static function display_perms($mode) {
// 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'."\n", $world['read'], $world['write'], $world['execute']);
return $s;
}
// Converts the file type
public static function get_flag_type($typflag) {
static $flag_types = array (
'0' => 'LF_NORMAL',
'1' => 'LF_LINK',
'2' => 'LF_SYNLINK',
'3' => 'LF_CHR',
'4' => 'LF_BLK',
'5' => 'LF_DIR',
'6' => 'LF_FIFO',
'7' => 'LF_CONFIG',
'D' => 'LF_DUMPDIR',
'K' => 'LF_LONGLINK',
'L' => 'LF_LONGNAME',
'M' => 'LF_MULTIVOL',
'N' => 'LF_NAMES',
'S' => 'LF_SPARSE',
'V' => 'LF_VOLHDR'
);
return @$flag_types[$typflag];
}
}
?>
|
