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+.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
+.\"
+.\" 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+.\" manual page may be incorrect or out-of-date.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.
+.\"
+.\" 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  2003-11-01 "" "Linux Programmer's Manual"
+.SH NAME
+atexit \- register a function to be called at normal program termination
+.SH SYNOPSIS
+.nf
+.B #include <stdlib.h>
+.sp
+.BI "int atexit(void (*" function )(void));
+.fi
+.SH DESCRIPTION
+The \fBatexit()\fP function registers the given \fIfunction\fP to be
+called at normal program termination, either via
+.BR exit (3)
+or via return from the program's \fBmain\fP().
+Functions so registered are called in
+the reverse order of their registration; no arguments are passed.
+.LP
+At least ATEXIT_MAX functions can be registered. This value
+is at least 32. It can be obtained using
+.BR sysconf (3).
+.LP
+By a successful call to one of the exec functions,
+all registrations are undone.
+.SH "RETURN VALUE"
+The \fBatexit()\fP function returns the value 0 if successful; otherwise
+it returns a nonzero value.
+.SH EXAMPLE
+.nf
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void bye(void) {
+        printf("That was all, folks\en");
+}
+
+int main(){
+        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");
+                return EXIT_FAILURE;
+        }
+        return EXIT_SUCCESS;
+}
+.fi
+.SH "CONFORMING TO"
+SVID 3, BSD 4.3, ISO 9899, POSIX 1003.1-2001
+.SH "SEE ALSO"
+.BR _exit (3),
+.BR exit (3),
+.BR on_exit (3)