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A Practical Guide to Red Hat® Linux® 8 by Mark G. Sobell

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POSIX.5

POSIX.5, an Ada language version of POSIX.1, specifies Ada routines that provide essentially the same functionality as the C routines of POSIX.1. The UNIX system itself is written in C, and C has always been the most widely used programming language on UNIX systems, but the Ada community has always been interested in the UNIX system and in providing a standard way for Ada programs to access UNIX system services. POSIX.5 provides that standard. In principle POSIX.5 provides the exact functionality provided by POSIX.1. This does not mean that there is a precise one-to-one correlation between the interfaces in POSIX.1 and POSIX.5 because differences in the languages make that correlation impossible.

The POSIX.5 working group is tracking ...

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