System Interfaces (XSH)
XSH is part of the Base Specifications. XSH describes a set of system interfaces offered to application programs by systems conformant to this volume of the Single UNIX Specification. Readers are expected to be experienced C language programmers, and to be familiar with the XBD volume.
This volume is structured as follows:
Chapter 1: Introduction
Explains the relationship of XSH to other formal standards and describes the format of the reference pages that comprise most of this volume.
Chapter 2: General Information
Contains important concepts, terms, and caveats relating to XSH. This includes the compilation environment, name space, error numbers, signal concepts, standard I/O streams, XSI IPC, realtime, threads, sockets, tracing, and data types.
Chapter 3: System Interfaces
Defines the functional interfaces to systems conformant to this volume. These are presented as reference pages and are organized alphabetically.