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56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
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/* lib/getloadavg.c - bsd-games implementation of getloadavg.
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*
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* Copyright (c) 1998, 1999 Joseph Samuel Myers.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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 <stdio.h>
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#include <stdlib.h>
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#ifndef HAVE_getloadavg
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int
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getloadavg(double loadavg[], int nelem)
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{
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double load_averages[3];
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FILE *fp;
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int count;
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int i;
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int nc;
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fp = fopen("/proc/loadavg", "r");
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if (fp == NULL)
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return -1;
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count = fscanf(fp, "%lf%lf%lf", &(load_averages[0]), &(load_averages[1]),
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&(load_averages[2]));
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fclose(fp);
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if ((count == EOF) || (count == 0))
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return -1;
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nc = ((nelem < count) ? nelem : count);
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for (i = 0; i < nc; i++)
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loadavg[i] = load_averages[i];
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return nc;
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}
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#endif
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