ATEXIT
NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO SEE ALSO
atexit - register a function to be called at normal program termination.
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The atexit() function registers the given function to be called at normal program termination, whether via exit(3) or via return from the program's main. Functions so registered are called in the reverse order of their registration; no arguments are passed.
The atexit() function returns the value 0 if successful; otherwise it returns a nonzero value; errno is not set.
SVID 3, BSD 4.3, ISO 9899
4 pages link to atexit(3):