Function fix_runroot

src/traffic_layout/engine.cc:638–650

the fixing permission of runroot used by verify command

// the fixing permission of runroot used by verify command
static void
fix_runroot(PermissionMapType &permission_map, const struct passwd *pwd)
{
  fix_flag = true;
  for (const auto &it : permission_map) {
    std::string name  = it.first;
    std::string value = it.second.path;
    permission_entry  = permission_map[name];
    ftw(value.c_str(), permission_handler, OPEN_MAX_FILE);
  }
  fix_flag = false;
  set_permission(permission_map, pwd);
}

void
LayoutEngine::verify_runroot()