The Open Group Base Specifications Issue 7, 2018 edition
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008)
Copyright © 2001-2018 IEEE and The Open Group

POSIX.1-2017 is simultaneously IEEE Std 1003.1-2017 and The Open Group Technical Standard Base Specifications, Issue 7.

POSIX.1-2017 defines a standard operating system interface and environment, including a command interpreter (or “shell”), and common utility programs to support applications portability at the source code level. POSIX.1-2017 is intended to be used by both application developers and system implementors and comprises four major components (each in an associated volume):

The following areas are outside the scope of POSIX.1-2017:

POSIX.1-2017 describes the external characteristics and facilities that are of importance to application developers, rather than the internal construction techniques employed to achieve these capabilities. Special emphasis is placed on those functions and facilities that are needed in a wide variety of commercial applications.


application program interface (API), argument, asynchronous, basic regular expression (BRE), batch job, batch system, built-in utility, byte, child, command language interpreter, CPU, extended regular expression (ERE), FIFO, file access control mechanism, input/output (I/O), job control, network, portable operating system interface (POSIX®), parent, shell, stream, string, synchronous, system, thread, X/Open System Interface (XSI)

Frontmatter (Informative)

[ Preface | Typographical Conventions | Notice to Users | Participants | Trademarks | Acknowledgements | Referenced Documents ]

Tables of Contents by volume: [ XBD | XSH | XCU | XRAT ]

Links: [ Alphabetic Index | Topical Index | About the HTML version | Downloads | Report a defect ]

Previous Editions

Links: [2008 | 2013 | 2016 ]

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