Function tempFile

src/env.cpp:1090–1140

}

HandlePtr tempFile(const std::wstring dir)
{
  // maximum tries of incrementing the counter
  const int MaxTries = 100;

  // UTC time and date will be in the filename
  const auto now = std::time(0);
  const auto tm  = std::gmtime(&now);

  // "ModOrganizer-YYYYMMDDThhmmss.dmp", with a possible "-i" appended, where
  // i can go until MaxTries
  std::wostringstream oss;
  oss << L"ModOrganizer-" << safeVersion() << std::setw(4) << (1900 + tm->tm_year)
      << std::setw(2) << std::setfill(L'0') << (tm->tm_mon + 1) << std::setw(2)
      << std::setfill(L'0') << tm->tm_mday << "T" << std::setw(2) << std::setfill(L'0')
      << tm->tm_hour << std::setw(2) << std::setfill(L'0') << tm->tm_min << std::setw(2)
      << std::setfill(L'0') << tm->tm_sec;

  const std::wstring prefix = oss.str();
  const std::wstring ext    = L".dmp";

  // first path to try, without counter in it
  std::wstring path = dir + L"\\" + prefix + ext;

  for (int i = 0; i < MaxTries; ++i) {
    std::wclog << L"trying file '" << path << L"'\n";

    HandlePtr h(CreateFileW(path.c_str(), GENERIC_WRITE, 0, nullptr, CREATE_NEW,
                            FILE_ATTRIBUTE_NORMAL, nullptr));

    if (h.get() != INVALID_HANDLE_VALUE) {
      // worked
      return h;
    }

    const auto e = GetLastError();

    if (e != ERROR_FILE_EXISTS) {
      // probably no write access
      std::wcerr << L"failed to create dump file, " << formatSystemMessage(e) << L"\n";

      return {};
    }

    // try again with "-i"
    path = dir + L"\\" + prefix + L"-" + std::to_wstring(i + 1) + ext;
  }

  std::wcerr << L"can't create dump file, ran out of filenames\n";
  return {};
}

HandlePtr dumpFile(const wchar_t* dir)
{