atexit
—
register a function to be called on exit
Standard C Library (libc, -lc)
#include <stdlib.h>
int
atexit
(void
(*function)(void));
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”).