Hello. Sign In
Standards Store

CSA ISO/IEC 9945-4

5th Edition, January 1, 2005

Complete Document

Information technology - Portable Operating System Interface (POSIX) - Part 4: Rationale

Includes all amendments and changes through Reaffirmation Notice , 2009

Detail Summary

Not Active, See comments below

Additional Comments:
Price (USD)
Secure PDF
Single User
In Stock
Add to Cart

Product Details:

  • Revision: 5th Edition, January 1, 2005
  • Published Date: January 2009
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: CSA Group (CSA)
  • Page Count: 361
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:


Several principles guided the development of this standard:

• Application-Oriented

The basic goal was to promote portability of application programs across UNIX system environments by developing a clear, consistent, and unambiguous standard for the interface specification of a portable operating system based on the UNIX system documentation. This standard codifies the common, existing definition of the UNIX system.

• Interface, Not Implementation

This standard defines an interface, not an implementation. No distinction is made between library functions and system calls; both are referred to as functions. No details of the implementation of any function are given (although historical practice is sometimes indicated in the RATIONALE section). Symbolic names are given for constants (such as signals and error numbers) rather than numbers.