Family of IEEE standards for compatibility between operating systems
Not to be confused with Unix, Unix-like, or Linux.
Portable Operating System Interface (IEEE 1003)
Abbreviation
POSIX
Status
Published
Year started
1988; 36 years ago (1988)
Latest version
IEEE Std 1003.1-2024 2024; 0 years ago (2024)
Organization
Austin Group (IEEE Computer Society, The Open Group, ISO/IEC JTC 1/SC 22/WG 15)
Related standards
ISO/IEC 9945
Domain
Application programming interfaces
Website
posix.opengroup.org
The Portable Operating System Interface (POSIX; IPA: /ˈpɒz.ɪks/[1]) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems.[1] POSIX defines both the system and user-level application programming interfaces (APIs), along with command line shells and utility interfaces, for software compatibility (portability) with variants of Unix and other operating systems.[1][2] POSIX is also a trademark of the IEEE.[1] POSIX is intended to be used by both application and system developers.[3]
^ abcd"POSIX.1 FAQ". The Open Group. 13 June 2020. Retrieved 20 February 2023.
^"P1003.1 - Standard for Information Technology--Portable Operating System Interface (POSIX(TM)) Base Specifications, Issue 8". IEEE Standards Association.
^"Introduction". The Open Group Base Specifications Issue 7, 2018 edition. Retrieved 22 July 2021.
The Portable Operating System Interface (POSIX; IPA: /ˈpɒz.ɪks/) is a family of standards specified by the IEEE Computer Society for maintaining compatibility...
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the next day). For example, this is what happened on strictly conforming POSIX.1 systems at the end of 1998: Unix time numbers are repeated in the second...
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modification from a de facto standard into a component of the POSIX specification. The term POSIX sockets is essentially synonymous with Berkeley sockets,...
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of archive file meta information to an ASCII-based representation. The POSIX standard abandoned cpio in favor of pax.[citation needed] cpio appeared...
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a digital copy of the POSIX standards documentation with a request to the comp.os.minix newsgroup. After not finding the POSIX documentation, Torvalds...
build the final program from them, one could instead create a script for POSIX-compliant shells, here named build and kept in the directory with them,...
defined in POSIX in a way which is reasonably compatible, robust and performant, and to provide additional useful features not defined in POSIX, just as...
Specification, although system developers generally aim for compliance with POSIX standards, which form the core of the Single UNIX Specification. The latest...
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