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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "ATEXIT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" atexit 
+.SH NAME
+atexit \- register a function to run at process termination
+.SH SYNOPSIS
+.LP
+\fB#include <stdlib.h>
+.br
+.sp
+int atexit(void (*\fP\fIfunc\fP\fB)(void));
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIatexit\fP() function shall register the function pointed to
+by \fIfunc\fP, to be called without arguments at normal
+program termination. At normal program termination, all functions
+registered by the \fIatexit\fP() function shall be called, in
+the reverse order of their registration, except that a function is
+called after any previously registered functions that had
+already been called at the time it was registered. Normal termination
+occurs either by a call to \fIexit\fP() or a return from \fImain\fP().
+.LP
+At least 32 functions can be registered with \fIatexit\fP().
+.LP
+After a successful call to any of the \fIexec\fP functions, any functions
+previously
+registered by \fIatexit\fP() shall no longer be registered. 
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIatexit\fP() shall return 0; otherwise,
+it shall return a non-zero value.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The functions registered by a call to \fIatexit\fP() must return to
+ensure that all registered functions are called.
+.LP
+The application should call \fIsysconf\fP() to obtain the value of
+{ATEXIT_MAX}, the
+number of functions that can be registered. There is no way for an
+application to tell how many functions have already been
+registered with \fIatexit\fP().
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIexit\fP() , \fIsysconf\fP() , the Base Definitions volume of
+IEEE\ Std\ 1003.1-2001, \fI<stdlib.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .