How to read all service names in SPNEGO from OS level

I have a special case where I have to check in many SAP systems if the service names for different domains were added in SPNEGO. I usually write the scripts to collect this information from the OS level and presents it as a report to me. However, I am facing some troubles to get the list of Service names in SPNEGO transaction of AS-ABAP systems from the OS level. Does anybody have an idea to get the below information from the OS level?