| 1 | /*
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| 2 | * Copyright 2001 The FreeBSD Project. All Rights Reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | *
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
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| 15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 16 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 17 | * DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT BE LIABLE FOR
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| 18 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 24 | * SUCH DAMAGE.
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| 25 | */
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| 26 |
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| 27 | #include <sys/cdefs.h>
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| 28 | __FBSDID("$FreeBSD: src/lib/libc/gen/sysctlnametomib.c,v 1.4 2003/01/04 00:11:11 tjr Exp $");
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| 29 |
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| 30 | #include <sys/types.h>
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| 31 | #include <sys/sysctl.h>
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| 32 | #include <string.h>
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| 33 |
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| 34 | /*
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| 35 | * This function uses a presently undocumented interface to the kernel
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| 36 | * to walk the tree and get the type so it can print the value.
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| 37 | * This interface is under work and consideration, and should probably
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| 38 | * be killed with a big axe by the first person who can find the time.
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| 39 | * (be aware though, that the proper interface isn't as obvious as it
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| 40 | * may seem, there are various conflicting requirements.
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| 41 | */
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| 42 | int
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| 43 | sysctlnametomib(const char *name, int *mibp, size_t *sizep)
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| 44 | {
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| 45 | int oid[2];
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| 46 | int error;
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| 47 |
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| 48 | oid[0] = 0;
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| 49 | oid[1] = 3;
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| 50 |
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| 51 | *sizep *= sizeof (int);
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| 52 | error = sysctl(oid, 2, mibp, sizep, (void *)name, strlen(name));
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| 53 | *sizep /= sizeof (int);
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| 54 | return (error);
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| 55 | }
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