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Is Linux POSIX-Compliant?

Submitted by Rianne Schestowitz on Thursday 14th of January 2021 08:57:33 AM Filed under
OS
Linux

Software is written by numerous developers with various backgrounds. General algorithms are available under a free license or have been scientifically published, and they might also be available for free for studying purposes. This results in different implementations and software versions that fit a variety of needs. A standardization of interfaces and data formats is necessary to make these different implementations both interchangeable and modular.

In short, POSIX [1] does exactly that for UNIX and UNIX-like systems (see Zak H’s article [4] for a more detailed history on this topic). It defines the exchange interfaces, calling mechanisms, and transferred data for the software but leaves the internal implementation to the developer or maintainer of the software. The aim is to unify all the various UNIX forks and UNIX-like systems in such a way that different software implementations can interact with one another. The main advantage of POSIX is to have a binding documentation for these components – interfaces, mechanisms, and data – available in written form.

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