2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2001 The FreeBSD Project. All Rights Reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT BE LIABLE FOR
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21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/types.h>
33 #include <sys/sysctl.h>
37 * This function uses a presently undocumented interface to the kernel
38 * to walk the tree and get the type so it can print the value.
39 * This interface is under work and consideration, and should probably
40 * be killed with a big axe by the first person who can find the time.
41 * (be aware though, that the proper interface isn't as obvious as it
42 * may seem, there are various conflicting requirements.
45 sysctlnametomib(const char *name, int *mibp, size_t *sizep)
53 *sizep *= sizeof(int);
54 error = sysctl(oid, 2, mibp, sizep, name, strlen(name));
55 *sizep /= sizeof(int);