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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 {
function getid3_tar(&$fd, &$ThisFileInfo) {
$ThisFileInfo['fileformat'] = 'tar';
$ThisFileInfo['tar']['files'] = array();
$unpack_header = 'a100fname/a8mode/a8uid/a8gid/a12size/a12mtime/a8chksum/a1typflag/a100lnkname/a6magic/a2ver/a32uname/a32gname/a8devmaj/a8devmin/a155prefix';
$null_512k = str_repeat("\x00", 512); // end-of-file marker
@fseek($fd, 0);
while (!feof($fd)) {
$buffer = fread($fd, 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);
$name = trim(@$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']);
if (($checksum == 256) && ($chksum == 0)) {
// EOF Found
break;
}
if ($prefix) {
$name = $prefix.'/'.$name;
}
if ((preg_match('#/$#', $name)) && !$name) {
$typeflag = 5;
}
if ($buffer == $null_512k) {
// it's the end of the tar-file...
break;
}
// Read to the next chunk
fseek($fd, $size, SEEK_CUR);
$diff = $size % 512;
if ($diff != 0) {
// Padding, throw away
fseek($fd, (512 - $diff), SEEK_CUR);
}
// Protect against tar-files with garbage at the end
if ($name == '') {
break;
}
$ThisFileInfo['tar']['file_details'][$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
);
$ThisFileInfo['tar']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['tar']['files'], getid3_lib::CreateDeepArray($ThisFileInfo['tar']['file_details'][$name]['name'], '/', $size));
}
return true;
}
// Parses the file mode to file permissions
function display_perms($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 $s;
}
// Converts the file type
function get_flag_type($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];
}
}
?>
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