+++ /dev/null
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified 1993-03-29, David Metcalfe
-.\" Modified 1993-07-24, Rik Faith (faith@cs.unc.edu)
-.\" Modified 2003-10-25, Walter Harms
-.\"
-.TH ATEXIT 3 2008-12-05 "Linux" "Linux Programmer's Manual"
-.SH NAME
-atexit \- register a function to be called at normal process termination
-.SH SYNOPSIS
-.nf
-.B #include <stdlib.h>
-.sp
-.BI "int atexit(void (*" function )(void));
-.fi
-.SH DESCRIPTION
-The
-.BR atexit ()
-function registers the given
-.I function
-to be
-called at normal process termination, either via
-.BR exit (3)
-or via return from the program's
-.IR main ().
-Functions so registered are called in
-the reverse order of their registration; no arguments are passed.
-
-The same function may be registered multiple times:
-it is called once for each registration.
-.LP
-POSIX.1-2001 requires that an implementation allow at least
-.B ATEXIT_MAX
-(32) such functions to be registered.
-The actual limit supported by an implementation can be obtained using
-.BR sysconf (3).
-.LP
-When a child process is created via
-.BR fork (2),
-it inherits copies of its parent's registrations.
-Upon a successful call to one of the
-.BR exec (3)
-functions,
-all registrations are removed.
-.SH RETURN VALUE
-The
-.BR atexit ()
-function returns the value 0 if successful; otherwise
-it returns a nonzero value.
-.SH CONFORMING TO
-SVr4, 4.3BSD, C89, C99, POSIX.1-2001.
-.SH NOTES
-Functions registered using
-.BR atexit ()
-(and
-.BR on_exit (3))
-are not called if a process terminates abnormally because
-of the delivery of a signal.
-
-If one of the functions registered functions calls
-.BR _exit (2),
-then any remaining functions are not invoked,
-and the other process termination steps performed by
-.BR exit (3)
-are not performed.
-
-POSIX.1-2001 says that the result of calling
-.BR exit (3)
-more than once (i.e., calling
-.BR exit (3)
-within a function registered using
-.BR atexit ())
-is undefined.
-On some systems (but not Linux), this can result in an infinite recursion;
-.\" This can happen on OpenBSD 4.2 for example, and is documented
-.\" as occurring on FreeBSD as well.
-.\" Glibc does "the Right Thing" -- invocation of the remaining
-.\" exit handlers carries on as normal.
-portable programs should not invoke
-.BR exit (3)
-inside a function registered using
-.BR atexit ().
-
-The
-.BR atexit ()
-and
-.BR on_exit (3)
-functions register functions on the same list:
-at normal process termination,
-the registered functions are invoked in reverse order
-of their registration by these two functions.
-
-POSIX.1-2001 says that the result is undefined if
-.BR longjmp (3)
-is used to terminate execution of one of the functions registered
-.BR atexit ().
-.\" In glibc, things seem to be handled okay
-.SS Linux notes
-Since glibc 2.2.3,
-.BR atexit ()
-(and
-.BR on_exit (3))
-can be used within a shared library to establish functions
-that are called when the shared library is unloaded.
-.SH EXAMPLE
-.nf
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-void
-bye(void)
-{
- printf("That was all, folks\en");
-}
-
-int
-main(void)
-{
- long a;
- int i;
-
- a = sysconf(_SC_ATEXIT_MAX);
- printf("ATEXIT_MAX = %ld\en", a);
-
- i = atexit(bye);
- if (i != 0) {
- fprintf(stderr, "cannot set exit function\en");
- exit(EXIT_FAILURE);
- }
-
- exit(EXIT_SUCCESS);
-}
-.fi
-.SH SEE ALSO
-.BR _exit (2),
-.BR exit (3),
-.BR on_exit (3)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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