ATEXIT(3) BSD Programmer's Manual ATEXIT(3)NAMEatexit - 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.
atexit() is very difficult to use correctly without creating exit(3)-time
races. Unless absolutely necessary, please avoid using it.
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.
SEE ALSOexit(3)STANDARDS
The atexit() function conforms to ANSI X3.159-1989 ("ANSI C").
MirOS BSD #10-current June 29, 1991 1
