71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
/*-
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* Copyright (c) 1989 The Regents of the University of California.
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* 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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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR 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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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char sccsid[] = "from: @(#)getloadavg.c 6.2 (Berkeley) 6/29/90";*/
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static char rcsid[] = "$Id: getloadavg.c,v 1.3 1994/01/28 04:49:27 cgd Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/kinfo.h>
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/*
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* getloadavg() -- Get system load averages.
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*
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* Put `nelem' samples into `loadavg' array.
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* Return number of samples retrieved, or -1 on error.
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*/
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getloadavg(loadavg, nelem)
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double loadavg[];
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int nelem;
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{
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int needed, err, i;
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struct loadavg averunnable;
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needed = getkerninfo(KINFO_LOADAVG, NULL, NULL, 0);
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if (needed != sizeof(struct loadavg))
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return -1;
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err = getkerninfo(KINFO_LOADAVG, &averunnable, &needed, 0);
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if (err != 0 || needed != sizeof(struct loadavg))
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return -1;
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if (nelem > 3)
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nelem = 3;
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for (i = 0; i < nelem; i++)
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loadavg[i] = (double) averunnable.ldavg[i] / averunnable.fscale;
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return nelem;
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}
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