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/a155/prefix';
$null_512k = str_repeat("", 512);
// end-of-file marker
@fseek($fd, 0);
while (!feof($fd)) {
$buffer = fread($fd, 512);
// 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;
}
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("", 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;
}
