POSIX comprises the following components:
POSIX subsystem
Incorporating a UNIX system kernel ported to BS2000.POSIX shell
to establish the link between the system kernel and BS2000 using the shell commands which comply with the XPG4 standard.Shared Libraries
Components for supporting shared objects are supplied with POSIX.POSIX sockets and XTI
The program interfaces for the transport system and communications services are provided with POSIX sockets and XTI (X/Open Transport Interface), and are part of BS2000 basic configuration.
In addition, POSIX offers additive program interfaces which go beyond the XPG4 standard, network program interfaces (TLI, RPC and XDR) and header files for program development. It is also possible to log POSIX events in order to create SecureAuditTrails (can only be used with the BS2000 product SECOS).