Function helperExec

src/spawn.cpp:913–977

{

bool helperExec(QWidget* parent, const std::wstring& moDirectory,
                const std::wstring& commandLine, BOOL async)
{
  const std::wstring fileName = moDirectory + L"\\helper.exe";

  env::HandlePtr process;

  {
    SHELLEXECUTEINFOW execInfo = {};

    ULONG flags = SEE_MASK_FLAG_NO_UI;
    if (!async)
      flags |= SEE_MASK_NOCLOSEPROCESS;

    execInfo.cbSize       = sizeof(SHELLEXECUTEINFOW);
    execInfo.fMask        = flags;
    execInfo.hwnd         = 0;
    execInfo.lpVerb       = L"runas";
    execInfo.lpFile       = fileName.c_str();
    execInfo.lpParameters = commandLine.c_str();
    execInfo.lpDirectory  = moDirectory.c_str();
    execInfo.nShow        = SW_SHOW;

    if (!::ShellExecuteExW(&execInfo) && execInfo.hProcess == 0) {
      const auto e = GetLastError();

      spawn::dialogs::helperFailed(parent, e, "ShellExecuteExW()", fileName,
                                   moDirectory, commandLine);

      return false;
    }

    if (async) {
      return true;
    }

    process.reset(execInfo.hProcess);
  }

  const auto r = ::WaitForSingleObject(process.get(), INFINITE);

  if (r != WAIT_OBJECT_0) {
    // for WAIT_ABANDONED, the documentation doesn't mention that GetLastError()
    // returns something meaningful, but code ERROR_ABANDONED_WAIT_0 exists, so
    // use that instead
    const auto code = (r == WAIT_ABANDONED ? ERROR_ABANDONED_WAIT_0 : GetLastError());

    spawn::dialogs::helperFailed(parent, code, "WaitForSingleObject()", fileName,
                                 moDirectory, commandLine);

    return false;
  }

  DWORD exitCode = 0;
  if (!GetExitCodeProcess(process.get(), &exitCode)) {
    const auto e = GetLastError();

    spawn::dialogs::helperFailed(parent, e, "GetExitCodeProcess()", fileName,