text: All modules are in the SARSINST library. The sequence of this exit, using the MVS Dynamic 
  Exit Facility, is different from the classical interface with exit modules or a security exit in an 
  IBM CICS environment. The kernel code was updated to allow external security. The Content 
  Manager OnDemand kernel code calls a dynamic link library (DLL) as an interface to the exit. 
  Modules ARSUSEC and ARSUPERM are provided as C source code modules and as 
  executable files. You do not need to change and recompile them. 
  
  The source is delivered mainly for understanding the entire security system exit. If you want to 
  change the modules, they must be recompiled and bound as a C dynamic link library (DLL). 
  These modules communicate with the ARSUSECX module, which is an interface to the MVS 
  Dynamic Exit Facility. The security exit module ARSUSECZ is the delivered sample that 
  shows how to perform security checks with a Security Exit Facility (SAF) interface. RACF is a 
  program that uses SAF. ARSUSECH is a C source code module that passes the data 
  structure as input for every exit (ARSUSECZ) that is provided. ARSUSEA provides the same 
  function in assembler language. 