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ATEXIT(3) BSD Library Functions Manual ATEXIT(3)
atexit -- register a function to be called on exit
Standard C Library (libc, -lc)
The atexit() function registers the given function to be called at program exit, whether via
exit(3) or via return from the program's main. Functions so registered are called in
reverse order; no arguments are passed. At least 32 functions can always be registered, and
more are allowed as long as sufficient memory can be allocated.
The atexit() function returns the value 0 if successful; otherwise the value -1 is returned
and the global variable errno is set to indicate the error.
[ENOMEM] No memory was available to add the function to the list. The existing
list of functions is unmodified.
The atexit() function conforms to ANSI X3.159-1989 (``ANSI C89'').
BSD June 4, 1993 BSD
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