POSIX as a subsystem in BS2000

POSIX is a privileged BS2000 subsystem which processes the jobs of privileged and nonprivileged users. The POSIX subsystem basically consists of three components:

• A UNIX system kernel which was ported into BS2000.

• BS2000 interfaces and services which set up a connection between the ported UNIX system kernel and BS2000.

• Separate routines for the initialization and termination of the POSIX subsystem.

The POSIX subsystem supports the POSIX file system.

Figure 10: Embedding the POSIX subsystem in BS2000

The “"DSSM/SSCM" [29]” manual contains general information on subsystems in BS2000.