Editing POSIX (section)

==Overview==
[[Unix]] was selected as the basis for a standard system interface partly because it was "manufacturer-neutral". However, several major versions of Unix existed—so there was a need to develop a common-denominator system. The POSIX specifications for [[Unix-like]] operating systems originally consisted of a single document for the core [[programming interface]], but eventually grew to 19 separate documents (POSIX.1, POSIX.2, etc.).<ref>{{Cite report|date=4 December 2003|title=PASC Status (including POSIX)|url=https://collaboration.opengroup.org/external/pasc.org/standing/sd11.html|publisher=[[IEEE Computer Society]]|access-date=26 September 2024}}</ref> The standardized user [[command-line interface|command line]] and [[command-line interface#Command-line interpreter|scripting interface]] were based on the [[UNIX System V]] shell.<ref>{{cite web|url=https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xcu_chap02.html|title=Shell Command Language - The Open Group Base Specifications Issue 7, 2013 Edition|access-date=28 April 2020}}</ref> Many user-level programs, services, and utilities (including [[AWK|awk]], [[echo (command)|echo]], [[ed (text editor)|ed]]) were also standardized, along with required program-level services (including basic [[input/output|I/O]]: [[computer file|file]], [[computer terminal|terminal]], and [[computer network|network]]). POSIX also defines a standard [[thread (computing)|threading]] library API which is supported by most modern operating systems. In 2008, most parts of POSIX were combined into a single standard ''(IEEE Std 1003.1-2008'', also known as ''POSIX.1-2008).''

{{As of | 2014 }}, POSIX documentation is divided into two parts:
* POSIX.1, 2013 Edition: POSIX Base Definitions, System Interfaces, and Commands and Utilities (which include POSIX.1, extensions for POSIX.1, Real-time Services, Threads Interface, Real-time Extensions, Security Interface, Network File Access and Network Process-to-Process Communications, User Portability Extensions, Corrections and Extensions, Protection and Control Utilities and Batch System Utilities. This is POSIX 1003.1-2008 with Technical Corrigendum 1.)
* POSIX Conformance Testing: A test suite for POSIX accompanies the standard: '''VSX-PCTS''' or the '''VSX POSIX Conformance Test Suite'''.<ref name = "VSX-PCTS">{{cite web | url = https://www.opengroup.org/testing/testsuites/vsxpcts2003.htm | title = Test Suites VSX-PCTS2003 | publisher = The Open Group}}</ref>

The development of the POSIX standard takes place in the [[Austin Group]] (a joint [[working group]] among the IEEE, [[The Open Group]], and the [[ISO/IEC JTC 1/SC 22]]/WG 15).