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/* Get system load averages. FreeBSD version.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <sys/sysctl.h>
struct loadavg
{
unsigned int ldavg[3];
long fscale;
};
/* Put the 1 minute, 5 minute and 15 minute load averages into the first
NELEM elements of LOADAVG. Return the number written (never more than
three, but may be less than NELEM), or -1 if an error occurred. */
int
getloadavg (double loadavg[], int nelem)
{
if (nelem > 3)
nelem = 3;
if (nelem > 0)
{
/* Fetch the "vm.loadavg" sysctl value. */
int request[2] = { CTL_VM, VM_LOADAVG };
struct loadavg result;
size_t result_len = sizeof (result);
int i;
if (__sysctl (request, 2, &result, &result_len, NULL, 0) < 0)
return -1;
for (i = 0; i < nelem; i++)
loadavg[i] = (double) result.ldavg[i] / (double) result.fscale;
}
return nelem;
}
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