UNIX System Home  •   The Single UNIX Specification  •   UNIX 03  •   UNIX V7  •   Mailing Lists  •   White Papers

Shell And Utilities (XCU) - Table of Contents

XBD Contents
XSH Contents
XCU Contents
XRAT Contents
XCURSES Contents
The Austin Group
ISO/IEC 9945
IEEE Std 1003.1
The Authorized Guide Book
Interface Counts

Shell and Utilities (XCU)

XCU1 is part of the Base Specifications, Issue 7. XCU describes the shell and utilities that are available to application programs on systems conformant to this volume of the Single UNIX Specification. Readers are expected to be familiar with the XBD volume.

This volume is structured as follows:

  • Chapter 1 explains the relationship of XCU to other formal standards, including the ISO C standard and also XSH. It also describes the utility limits, grammar conventions, defaults used by the utility descriptions, considerations for utilities in support of large files, and requirements for built-in utilities.

  • Chapter 2 describes the command language-that is, the shell command language interpreter-used in systems conformant to the Single UNIX Specification. It also includes reference pages for the special built-in utilities, organized alphabetically.

  • Chapter 3 describes a set of services and utilities that are implemented on systems supporting the Batch Environment option.

  • Chapter 4 consists of reference pages for all utilities-other than the special built-in utilities described in Chapter 2-available on systems conforming to the Single UNIX Specification. These are in the form of reference pages and are organized alphabetically.


The acronym ``XCU'' derives from an earlier version of this volume of the specification which was called ``Commands and Utilities''.


Home · Contacts · Legal · Copyright · Members · News
© The Open Group 1995-2020