C POSIX library

C POSIX library

The C POSIX library is a language-independent library (using C calling conventions) that adds functions specific to POSIX systems. POSIX (and SUS) specifies a number of routines that should be available over and above those in the C standard library proper. It was developed at the same time as the ANSI C standard and is closely related to C. Some effort was made to make the C and POSIX libraries compatible, but there are a few POSIX functions that were never introduced into ANSI C.

Facilities are often implemented alongside the C standard library functionality, with varying degrees of closeness. For example, glibc implements functions such as fork within libc.so, but before NPTL was merged into glibc it constituted a separate library with its own linker flag. Often, this POSIX-specified functionality will be regarded as part of the library; the C library proper may be identified as the ANSI or ISO C library.

C POSIX library header files

References

* [http://www.space.unibe.ch/comp_doc/c_manual/C/FUNCTIONS/funcref.htm#posix Lists headers in the POSIX library]
* [http://www.ncsa.uiuc.edu/UserInfo/Resources/Hardware/IBMp690/IBM/usr/share/man/info/en_US/a_doc_lib/files/aixfiles/termios.h.htm about termios.h]
* [http://www.cs.utah.edu/flux/oskit/html/oskit-wwwch20.html Description of the posix library]


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