ATEXIT(3) MachTen Programmer’s Manual ATEXIT(3)

NAME
atexit - register a function to be called on exit

SYNOPSIS
#include <stdlib.h>

int
atexit(void (*function)(void))

DESCRIPTION
The atexit() function registers the given function to be called at pro-
gram 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 al-
lowed as long as sufficient memory can be allocated.

RETURN VALUES
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.

ERRORS
[ENOMEM] No memory was available to add the function to the list. The
existing list of functions is unmodified.