62399df2c9
The `name' and `newp' arguments can be marked const, because the buffers they refer to are never changed. While there, perform some other cleanups: - Remove K&R from sysctl.c. - Implement sysctlbyname() using sysctlnametomib() to prevent duplication of an undocumented kernel interface. - Fix some whitespace nits. It seems the prototypes are now in sync with NetBSD as well.
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* Copyright 2001 The FreeBSD Project. 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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*
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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 FREEBSD PROJECT ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <string.h>
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/*
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* This function uses a presently undocumented interface to the kernel
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* to walk the tree and get the type so it can print the value.
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* This interface is under work and consideration, and should probably
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* be killed with a big axe by the first person who can find the time.
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* (be aware though, that the proper interface isn't as obvious as it
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* may seem, there are various conflicting requirements.
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*/
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int
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sysctlnametomib(const char *name, int *mibp, size_t *sizep)
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{
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int oid[2];
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int error;
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oid[0] = 0;
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oid[1] = 3;
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*sizep *= sizeof(int);
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error = sysctl(oid, 2, mibp, sizep, name, strlen(name));
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*sizep /= sizeof(int);
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return (error);
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}
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