find system drive

include/reHDD.h

@@ -31,7 +31,7 @@
 #endif
 
 // Logic
-//#define DRYRUN //don´t touch the drives
+#define DRYRUN //don´t touch the drives
 #define FROZEN_ALERT // show alert if drive is frozen
 #define ZERO_CHECK   // check drive after shred if all bytes are zero, show alert if this fails
 
@@ -101,6 +101,7 @@ private:
     static void handleESC();
     static void handleAbort();
     static Drive *getSelectedDrive();
+    static bool getSystemDrive(string &systemDrive);
 };
 
 #endif // REHDD_H_