1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
5 *
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory (Department of Computer Science and
8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
9 * DARPA SSITH research programme.
10 *
11 * This software was developed by SRI International and the University of
12 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
13 * ("CTSRD"), as part of the DARPA CRASH research programme.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 *    notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in the
22 *    documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36/* This file contains wrappers for sysctls used during build/install */
37#include <sys/cdefs.h>
38#include <sys/sysctl.h>
39
40#include <err.h>
41#include <string.h>
42#include <sysexits.h>
43
44int
45__freebsd_sysctlbyname(const char *name, void *oldp, size_t *oldlenp,
46    const void *newp, size_t newlen)
47{
48	if (strcmp(name, "kern.vm_guest") == 0) {
49		if (!oldp || !oldlenp)
50			errx(EX_USAGE, "Missing arguments for kern.vm_guest");
51
52		if (newp || newlen)
53			errx(EX_USAGE, "kern.vm_guest is read-only");
54		strlcpy(oldp, "none", *oldlenp);
55		*oldlenp = strlen("none");
56	}
57	errx(EX_USAGE, "fatal: unknown sysctl %s\n", name);
58}
59