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--- publications:standards [2024/06/06 08:17] – Create skeleton segaloco
+++ publications:standards [2024/06/06 08:40] – document POSIX standard segaloco
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 ==== /usr/group ====
+{{:publications:1984_usr_group.jpg?direct&200|1984 /usr/group Proposed Standard}}
+Prepared on January 17, 1984, the /usr/group standard is an early UNIX standard proposed by the /usr/group international network of UNIX users.  This document was published along with the "Reviewer's Guide to the PROPOSED /usr/group Standard" as compiled March 14, 1984 and prepared by David L. Buck, which contains notes on the standard as well as a few focused papers on specific features such as file locking interfaces.
+From the abstract:
+This document describes a Standard for computer operating systems that are functionally compatible with the UNIX operating system developed by AT&T Bell Laboratories.  In its present form, the document focuses primarily on the "C" Language interface to the operating system.  This document is largely based on UNIX System III, but wherever possible, compatibility with UNIX Version 7 has been maintained.
+This document is intended to be used by both application and system vendors to assist with the development of computer software which is portable across a large number and wide variety of computer systems.
 ==== System V Interface Definition ====
 ==== POSIX/IEEE 1003 ====
+{{:publications:1986_posix_draft.jpg?direct&200|1986 Draft POSIX Standard}}{{:publications:1988_posix.jpg?direct&200|1988 POSIX Standard}}
+IEEE 1003.1, otherwise known as the POSIX standard, is published by the IEEE and is the current basis of the Single UNIX Specification as maintained and enforced by The Open Group.  Drawing from both the /usr/group and System V Interface Definition standards, POSIX aims to be a vendor-neutral standard applicable to diverse operating systems presenting a UNIX-like application programming interface.
+While IEEE 1003.1 itself merely defines the C language interfaces for system services, additional 1003-family standards exist, such as 1003.2, defining the user-level commands available on UNIX systems.
+From the foreword of IEEE 1003.1-1988:
+The purpose of this standard is to define a standard operating system interface and environment based on the UNIX Operating System documentation to support application portability at the source level.  This is intended for systems implementors and applications software developers.
+The foreword goes on to describe the derivation of this standard:
+The various interface facilities described herein are based on the 1984 /usr/group Standard derived and published by the /usr/group Standards Committee, Santa Clara, California.  The 1984 /usr/group Standard and subsequent work of the 1003.1 Working Group is largely based on UNIX Seventh Edition, UNIX System III, UNIX System V, 4.2BSD, and 4.3BSD documentation, but wherever possible, compatibility with other systems derived from the UNIX operating system, or systems compatible with that system, has been maintained.