Loadavg (BSD): use sysctl

src/detection/loadavg/loadavg_bsd.c

@@ -1,8 +1,14 @@
 #include "detection/loadavg/loadavg.h"
 
-#include <stdlib.h>
+#include <sys/sysctl.h>
 
 const char* ffDetectLoadavg(double result[3])
 {
-    return getloadavg(result, 3) < 0 ? "getloadavg() failed" : NULL;
+    struct loadavg load;
+    size_t size = sizeof(load);
+    if (sysctl((int []) { CTL_VM, VM_LOADAVG }, 2, &load, &size, NULL, 0) < 0)
+        return "sysctl({CTL_VM, VM_LOADAVG}) failed";
+    for (int i = 0; i < 3; i++)
+        result[i] = (double) load.ldavg[i] / (double) load.fscale;
+    return NULL;
 }