fusl/src/legacy/getloadavg.c

#define _GNU_SOURCE
#include <stdlib.h>
#include <sys/sysinfo.h>

int getloadavg(double* a, int n) {
  struct sysinfo si;
  if (n <= 0)
    return n ? -1 : 0;
  sysinfo(&si);
  if (n > 3)
    n = 3;
  for (int i = 0; i < n; i++)
    a[i] = 1.0 / (1 << SI_LOAD_SHIFT) * si.loads[i];
  return n;
}