Added basic high privilege checks and message box

scwx-qt/source/scwx/qt/util/check_privilege.cpp

@@ -0,0 +1,43 @@
+#include "scwx/qt/util/check_privilege.hpp"
+#include <QtGlobal>
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+
+namespace scwx {
+namespace qt {
+namespace util {
+
+bool is_high_privilege()
+{
+#if defined(_WIN32)
+   bool   isAdmin = false;
+   HANDLE token    = NULL;
+   TOKEN_ELEVATION elevation;
+   DWORD           elevationSize = sizeof(TOKEN_ELEVATION);
+
+   if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
+   {
+      return false;
+   }
+   if (!GetTokenInformation(
+          token, TokenElevation, &elevation, elevationSize, &elevationSize))
+   {
+      CloseHandle(token);
+      return false;
+   }
+   isAdmin = elevation.TokenIsElevated;
+   CloseHandle(token);
+   return isAdmin;
+#elif defined(Q_OS_UNIX)
+   // On UNIX root is always uid 0. On Linux this is enforced by the kernal.
+   return geteuid() == 0;
+#endif
+}
+
+} // namespace util
+} // namespace qt
+} // namespace scwx