Method InitInstance

cppcryptfs/cppcryptfs.cpp:230–446

BOOL CcppcryptfsApp::InitInstance()
{

	const WCHAR *szUniqueNamedMutex = L"cppcryptfs-A7DDB0CF-A856-4E8A-A4E9-722473FB5E49";

	HANDLE hAppMutex = CreateMutex(NULL, TRUE, szUniqueNamedMutex);
	if (GetLastError() == ERROR_ALREADY_EXISTS)
	{
		// Program already running - but hAppMutex is NOT NULL.
		// Aparently it is not necessary to close it in this case.

		// Do something and then return FALSE to exit the app.

		// we can't use classname because our main window is a PropertySheet and has 
		// class name "DIALOG".  I've seen info about how to change the class
		// name of a dialog-based app, but not for one based on a PropertySheet
		// TODO - it may be possible to use a custom class name

		// currently use "#32770" for the class (which is the class string for generic dialog boxes)

		HWND hWnd = FindWindow(L"#32770", L"cppcryptfs");

		if (hWnd) {
			if (have_args()) {

				bool have_console = OpenConsole(0); 

				wstring err_mes;
				wstring result;

				if (SendArgsToRunningInstance(GetCommandLine(), result, err_mes)) {
					if (err_mes.length() > 0)
						err_mes += L"\n";
					else
						err_mes = L"cppcryptfsctl: Unable to send command. Is cppcryptfs really already running?\n";
				} else {
					if (result.length() >= CMD_PIPE_RESPONSE_LENGTH) {
						if (wcsncmp(result.c_str(), CMD_PIPE_SUCCESS_STR, CMD_PIPE_RESPONSE_LENGTH) == 0) {
							wstring mes = result.c_str() + CMD_PIPE_RESPONSE_LENGTH;
							if (mes.length() > 0) {
								if (have_console)
									wcout << mes << endl;
								else
									::MessageBox(NULL, mes.c_str(), L"cppcryptfs", MB_OK);
							}
						} else {
							err_mes = wstring(result.c_str() + CMD_PIPE_RESPONSE_LENGTH);
						}
					} else {
						err_mes = L"cppcryptfs: got a mal-formed response from running instance of cppcryptfs\n";
					}
				}

				if (err_mes.length() > 0) {
					if (have_console) {
						wcerr << err_mes;
					} else {
						::MessageBox(NULL, err_mes.c_str(), L"cppcryptfs", MB_ICONERROR | MB_OK);