Changes between Initial Version and Version 1 of Ticket #19590, comment 16

Ticket #19590, comment 16

-              initial
+              v1
 I'd suggest a much more conservative approach to determine whether or not we might assume an X11 environment, and that is by explicitely checking for the Xwayland case instead of the X11 case. This should work for older, nonsystemd distros that currently fail the check:
-{{{
-fbatschu@minibox:~$ diff -c display-svga-x11.cpp.orig display-svga-x11.cpp
-*** display-svga-x11.cpp.orig   2020-05-18 17:50:13.013704770 +0200
---- display-svga-x11.cpp        2020-05-18 18:34:57.231535635 +0200
-***************
-*** 658,671 ****
-   */
-  static bool isX11()
+  {
-!     char* pSessionType;
-!     pSessionType = getenv("XDG_SESSION_TYPE");
-!     if (pSessionType != NULL)
-!     {
-!         if (RTStrIStartsWith(pSessionType, "x11"))
-!             return true;
+      }
-!     return false;
+  }
-  static bool init()
---- 658,673 ----
-   */
-  static bool isX11()
+  {
-!     const char *const pSessionType = getenv("XDG_SESSION_TYPE");
-!     const char *pDisplayType;
+!
-!     if ((pSessionType != NULL) && (RTStrIStartsWith(pSessionType, "wayland")) {
-!         return false;
-!     }
-!     if ((pDisplayType = getenv("WAYLAND_DISPLAY")) != NULL) {
-!         return false;
+      }
-!     return true;
+  }
-  static bool init()
-}}}