protected function TarArchiveWriter::writeHeader in Backup and Migrate 8.4

Parameters

$real_path:

$new_path:

Return value

bool

1 call to TarArchiveWriter::writeHeader()

TarArchiveWriter::addFile in lib/backup_migrate_core/src/Service/TarArchiveWriter.php

File

lib/backup_migrate_core/src/Service/TarArchiveWriter.php, line 59

Class

TarArchiveWriter

Class TarArchiver.

Namespace

BackupMigrate\Core\Service

Code

protected function writeHeader($real_path, $new_path) {
  if (strlen($new_path) > 99) {
    $this
      ->writeLongHeader($new_path);
  }
  $v_info = lstat($real_path);
  $v_uid = sprintf("%6s ", decoct($v_info[4]));
  $v_gid = sprintf("%6s ", decoct($v_info[5]));
  $v_perms = sprintf("%6s ", decoct($v_info['mode']));
  $v_mtime = sprintf("%11s", decoct($v_info['mtime']));
  $v_linkname = '';
  if (@is_link($real_path)) {
    $v_typeflag = '2';
    $v_linkname = readlink($real_path);
    $v_size = sprintf("%11s ", decoct(0));
  }
  elseif (@is_dir($real_path)) {
    $v_typeflag = "5";
    $v_size = sprintf("%11s ", decoct(0));
  }
  else {
    $v_typeflag = '';
    clearstatcache(TRUE, $real_path);
    $v_size = sprintf("%11s ", decoct($v_info['size']));
  }
  $v_magic = '';
  $v_version = '';
  $v_uname = '';
  $v_gname = '';
  $v_devmajor = '';
  $v_devminor = '';
  $v_prefix = '';
  $v_binary_data_first = pack("a100a8a8a8a12A12", $new_path, $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.
  $this->archive
    ->write($v_binary_data_first, 148);

  // ----- Write the calculated checksum.
  $v_checksum = sprintf("%6s ", decoct($v_checksum));
  $v_binary_data = pack("a8", $v_checksum);
  $this->archive
    ->write($v_binary_data, 8);

  // ----- Write the last 356 bytes of the header in the archive.
  $this->archive
    ->write($v_binary_data_last, 356);
}