Check from MEX-file if Matlab started with GUI

Hello everyone,

the headline already describes pretty well what I have to do: I have to check from a MEX-file whether Matlab on Linux has been started with or without GUI.

Background: I run a C/C++-Program (from wich I can use the sources, but am not allowed to change them!) from Matlab. I wrote several (additional) MEX-files that allow the program to use mexCallMATLAB to evaluate m-files. Now I need to know where I have to direct the output from a function callable from my MEX-files, because up to now I can only redirect it by changing hard-coded parameters (but I already can direct it to the right outputs!).

Up to R2012x, a check was possible using the C++-function isatty(), but from R2013a on, this check fails, and Matlab appears to be started from console only, even though i has been started with GUI.

I couldn't find an answer to my question anywhere, so I'm asking you if someone maybe knows a functions like this, or another solution to my problem!

Thank you people in advance!

Greetings, Adrian