If the BPX.SERVER (or BPX.DAEMON) FACILITY class is not defined, your system has UNIX-level security. In this case, the system is less secure. This level of security is for installations where superuser authority has been granted to system programmers. These individuals already have permission to access critical MVS™ data sets such as PARMLIB, PROCLIB, and LINKLIB. These system programmers have total authority over a system. Server programs that run with superuser authority can issue pthread_security_np() service to change the MVS identity of a thread.

To establish UNIX-level security, assign a UID of 0 to the superuser and assign a UID of 0 to the user ID used for running server programs; for example, DATASRVR.