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 __FBSDID("$FreeBSD$");
39 
40 #include <sys/sysctl.h>
41 
42 #include <err.h>
43 #include <string.h>
44 #include <sysexits.h>
45 
46 int
47 __freebsd_sysctlbyname(const char *name, void *oldp, size_t *oldlenp,
48     const void *newp, size_t newlen)
49 {
50 	if (strcmp(name, "kern.vm_guest") == 0) {
51 		if (!oldp || !oldlenp)
52 			errx(EX_USAGE, "Missing arguments for kern.vm_guest");
53 
54 		if (newp || newlen)
55 			errx(EX_USAGE, "kern.vm_guest is read-only");
56 		strlcpy(oldp, "none", *oldlenp);
57 		*oldlenp = strlen("none");
58 	}
59 	errx(EX_USAGE, "fatal: unknown sysctl %s\n", name);
60 }
61