How to find whether the system is DEV or QAT or PRD programatically

hello everyone,

my requirement is that a path has to be hardcoded in the program. this is an AL11 path.

and so will have something like /usr/sap/dev/.......how do i find dev or qat or prd becoz if i kw if i hardcode this wud create probs in QAT and PRD.

thanks,

lavanya