ATEXIT(3)                 386BSD 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
     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.

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 ALSO
     exit(3)

STANDARDS
     The atexit() function conforms to ANSI C3.159-1989 (``ANSI C'').

BSD Experimental                 June 29, 1991                               1