/*      $NetBSD: h_fpufork.c,v 1.1 2020/02/11 03:15:10 riastradh Exp $  */

/*-
* Copyright (c) 2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: h_fpufork.c,v 1.1 2020/02/11 03:15:10 riastradh Exp $");

#include <sys/wait.h>

#include <err.h>
#include <sched.h>
#include <stdio.h>
#include <unistd.h>

int
main(void)
{
       pid_t child, pid;
       volatile double x = 1;
       register double y = 2*x;
       int status;

       pid = fork();
       switch (pid) {
       case -1:                /* error */
               err(1, "fork");
       case 0:                 /* child */
               _exit(y == 2 ? 0 : 1);
       default:                /* parent */
               break;
       }

       if ((child = wait(&status)) == -1)
               err(1, "wait");
       if (WIFSIGNALED(status))
               errx(1, "child exited on signal %d", WTERMSIG(status));
       if (!WIFEXITED(status))
               errx(1, "child didn't exit");
       return WEXITSTATUS(status);
}