65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
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/* $NetBSD: h_fpufork.c,v 1.1 2020/02/11 03:15:10 riastradh Exp $ */
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/*-
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* Copyright (c) 2020 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: h_fpufork.c,v 1.1 2020/02/11 03:15:10 riastradh Exp $");
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#include <sys/wait.h>
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#include <err.h>
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#include <sched.h>
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#include <stdio.h>
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#include <unistd.h>
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int
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main(void)
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{
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pid_t child, pid;
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volatile double x = 1;
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register double y = 2*x;
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int status;
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pid = fork();
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switch (pid) {
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case -1: /* error */
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err(1, "fork");
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case 0: /* child */
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_exit(y == 2 ? 0 : 1);
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default: /* parent */
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break;
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}
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if ((child = wait(&status)) == -1)
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err(1, "wait");
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if (WIFSIGNALED(status))
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errx(1, "child exited on signal %d", WTERMSIG(status));
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if (!WIFEXITED(status))
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errx(1, "child didn't exit");
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return WEXITSTATUS(status);
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}
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