getloadavg.c raw

   1  #define _GNU_SOURCE
   2  #include <stdlib.h>
   3  #include <sys/sysinfo.h>
   4  
   5  int 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  }
  15