Method readOutput

src/lib/platform/MSWindowsProcess.cpp:229–254

}

std::wstring MSWindowsProcess::readOutput(HANDLE handle)
{
  const auto kOutputBufferSize = 4096;
  wchar_t buffer[kOutputBufferSize]; // NOSONAR -- Idiomatic Win32

  DWORD bytesRead;
  DWORD totalBytesAvail;
  DWORD bytesLeftThisMessage;

  // Check if there is data available in the pipe, which prevents `ReadFile` from freezing execution.
  if (!PeekNamedPipe(handle, nullptr, 0, nullptr, &totalBytesAvail, &bytesLeftThisMessage)) {
    LOG_ERR("could not peek into pipe");
    throw std::runtime_error(windowsErrorToString(GetLastError()));
  }

  if (totalBytesAvail == 0) {
    return {};
  }

  if (!ReadFile(handle, buffer, kOutputBufferSize, &bytesRead, nullptr)) {
    LOG_ERR("could not read from pipe");
    throw std::runtime_error(windowsErrorToString(GetLastError()));
  }

  return std::wstring(buffer, bytesRead);
}

} // namespace deskflow::platform