1.20.x system.tar.inc | public Archive_Tar::_writeLongHeader($p_filename, $is_link = false) |
Parameters
string $p_filename:
Return value
bool:
File
- modules/
system/ system.tar.inc, line 1649
Class
Code
public function _writeLongHeader($p_filename, $is_link = false)
{
$v_uid = sprintf("%07s", 0);
$v_gid = sprintf("%07s", 0);
$v_perms = sprintf("%07s", 0);
$v_size = sprintf("%'011s", DecOct(strlen($p_filename)));
$v_mtime = sprintf("%011s", 0);
$v_typeflag = ($is_link ? 'K' : 'L');
$v_linkname = '';
$v_uname = '';
$v_gname = '';
$v_devmajor = '';
$v_devminor = '';
$v_prefix = '';
$v_binary_data_first = pack(
"a100a8a8a8a12a12",
'././@LongLink',
$v_perms,
$v_uid,
$v_gid,
$v_size,
$v_mtime
);
$v_binary_data_last = pack(
"a1a100a6a2a32a32a8a8a155a12",
$v_typeflag,
$v_linkname,
$v_magic,
$v_version,
$v_uname,
$v_gname,
$v_devmajor,
$v_devminor,
$v_prefix,
''
);
// ----- Calculate the checksum
$v_checksum = 0;
// ..... First part of the header
for ($i = 0; $i < 148; $i++) {
$v_checksum += ord(substr($v_binary_data_first, $i, 1));
}
// ..... Ignore the checksum value and replace it by ' ' (space)
for ($i = 148; $i < 156; $i++) {
$v_checksum += ord(' ');
}
// ..... Last part of the header
for ($i = 156, $j = 0; $i < 512; $i++, $j++) {
$v_checksum += ord(substr($v_binary_data_last, $j, 1));
}
// ----- Write the first 148 bytes of the header in the archive
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%06s\0 ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
// ----- Write the filename as content of the block
$i = 0;
while (($v_buffer = substr($p_filename, (($i++) * 512), 512)) != '') {
$v_binary_data = pack("a512", "$v_buffer");
$this->_writeBlock($v_binary_data);
}
return true;
}