- register a function to be called on exit
Standard C Library (libc, -lc)
registers the given
to be called at program exit, whether via
or via return from the program's
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.
No memory was available to add the function to the list.
The existing list of functions is unmodified.
ANSI X3.159-1989 (``ANSI C89'') .