The Portable Operating System Interface (POSIX; IPA: ) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines application programming interfaces (APIs), along with command line shells and utility interfaces, for software compatibility (portability) with variants of Unix and other operating systems. POSIX is also a trademark of the IEEE. POSIX is intended to be used by both application and system developers. As of POSIX 2024, the standard is aligned with the C17 language standard.
Name
Originally, the name "POSIX" referred to IEEE Std 1003.1-1988, released in 1988. The family of POSIX standards is formally designated as IEEE 1003 and the ISO/IEC standard number is ISO/IEC 9945.
The standards emerged from a project that began in 1984 building on work from related activity in the /usr/group association. Richard Stallman suggested the name POSIX to the IEEE instead of the former IEEE-IX. The committee found it more easily pronounceable and memorable, and thus adopted...
Phantasm
All GNU social JP content and data are available under the