Method SendCmdArgsToSelf

cppcryptfs/cppcryptfs.cpp:485–529

void CcppcryptfsApp::SendCmdArgsToSelf(HANDLE hPipe)
{

	HWND hWnd = ::FindWindow(L"#32770", L"cppcryptfs");
	if (!hWnd)
		return;

	DWORD win_proc_id = 0;

	GetWindowThreadProcessId(hWnd, &win_proc_id);

	if (win_proc_id != ::GetCurrentProcessId())
		return;

	static_assert(sizeof(WCHAR) == sizeof(wchar_t), "sizeof(WCHAR) != sizeof(wchar_t).");
	COPYDATASTRUCT cd;
	memset(&cd, 0, sizeof(cd));
	cd.dwData = CPPCRYPTFS_COPYDATA_PIPE;

	std::vector<HANDLE> pipe_v;

	pipe_v.push_back(hPipe);
	
	cd.cbData =static_cast<DWORD>(sizeof(hPipe));
	
	cd.lpData = static_cast<PVOID>(&pipe_v[0]);
	
	SetLastError(0);
	SendMessageW(hWnd, WM_COPYDATA, NULL, (LPARAM)&cd);
	DWORD dwErr = GetLastError();
	if (dwErr) {
		if (dwErr == ERROR_ACCESS_DENIED) {
			ConsoleErrMesPipe(L"SendMessage() returned error \"access denied\".\n\nPerhaps there is"
				" already an instance of cppcryptfs running with administrator\nprivileges, but"
				" you invoked this instance of cppcryptfs from a command prompt\nthat is not running"
				" with administrator privileges.\n\nIf this is the case, then you should start a"
				" CMD.exe window using\n\"Run as administrator\" and invoke cppcryptfs from within it.", hPipe);
		} else {
			WCHAR buf[80];
			_snwprintf_s(buf, _TRUNCATE, L"SendMessage() returned error code %u", dwErr);
			ConsoleErrMesPipe(buf, hPipe);
		}
	}
				
}