1#define _GNU_SOURCE
 2#include <stdlib.h>
 3#include <sys/sysinfo.h>
 4
 5int getloadavg(double *a, int n)
 6{
 7	struct sysinfo si;
 8	if (n <= 0) return n ? -1 : 0;
 9	sysinfo(&si);
10	if (n > 3) n = 3;
11	for (int i=0; i<n; i++)
12		a[i] = 1.0/(1<<SI_LOAD_SHIFT) * si.loads[i];
13	return n;
14}