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/*

 * Copyright (c) 1990 Regents of the University of California.

 * All rights reserved.

 *

 * %sccs.include.redist.c%

 */

/*

FUNCTION

<<exit>>---end program execution

INDEX

        exit

ANSI_SYNOPSIS

        #include <stdlib.h>

        void exit(int <[code]>);

TRAD_SYNOPSIS

        #include <stdlib.h>

        void exit(<[code]>)

        int <[code]>;

DESCRIPTION

Use <<exit>> to return control from a program to the host operating

environment.  Use the argument <[code]> to pass an exit status to the

operating environment: two particular values, <<EXIT_SUCCESS>> and

<<EXIT_FAILURE>>, are defined in `<<stdlib.h>>' to indicate success or

failure in a portable fashion.

<<exit>> does two kinds of cleanup before ending execution of your

program.  First, it calls all application-defined cleanup functions

you have enrolled with <<atexit>>.  Second, files and streams are

cleaned up: any pending output is delivered to the host system, each

open file or stream is closed, and files created by <<tmpfile>> are

deleted.

RETURNS

<<exit>> does not return to its caller.

PORTABILITY

ANSI C requires <<exit>>, and specifies that <<EXIT_SUCCESS>> and

<<EXIT_FAILURE>> must be defined.

Supporting OS subroutines required: <<_exit>>.

*/

#include <stdlib.h>

#include <unistd.h>     /* for _exit() declaration */

#include <reent.h>

#ifndef _REENT_ONLY

/*

 * Exit, flushing stdio buffers if necessary.

 */

void

_DEFUN (exit, (code),

        int code)

{

  register struct _atexit *p;

  register int n;

  for (p = _REENT->_atexit; p; p = p->_next)

    for (n = p->_ind; --n >= 0;)

      (*p->_fns[n]) ();

  if (_REENT->__cleanup)

    (*_REENT->__cleanup) (_REENT);

  _exit (code);

}

#endif