pyqgis - Check whether QGIS3 was started by qgis.bat or qgis.exe

Is it possible to check whether QGIS3 was started by executing qgis.bat or qgis.exe directly?

I want to do some checks in the qgis.bat before qgis starts and make sure that qgis is always started by calling the qgis.bat.

Edit1:

One idea is to set an environment variable in the qgis bat and check in the startup.py if this environmental variable is found:

bat-file:

set batchfilestart="YES"

python part

import os
try:  
    env_value = os.environ.get("batchfilestart")
    if env_value !="YES":
        print ("QGIS not started by calling the bat file")
        print (env_value)
    else:
        print("QGIS started by calling the bat file")
        print (env_value)
except KeyError: 

    print("Not exist environment value for %s" % "key_maybe_not_exist")

Is there a better way to make sure I can always run some checks before QGIS starts?