1 files changed, 9 insertions, 1 deletions

diff --git a/src/lib/libc/stdlib/drand48.c b/src/lib/libc/stdlib/drand48.c
index b6c046c831..bbeedf8a8a 100644
--- a/src/lib/libc/stdlib/drand48.c
+++ b/src/lib/libc/stdlib/drand48.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: drand48.c,v 1.3 2005/08/08 08:05:36 espie Exp $ */
+/*      $OpenBSD: drand48.c,v 1.4 2014/12/08 21:45:20 deraadt Exp $ */
 /*
  * Copyright (c) 1993 Martin Birgmeier
  * All rights reserved.
@@ -19,5 +19,13 @@ extern unsigned short __rand48_seed[3];
 double
 drand48(void)
 {
+        if (__rand48_deterministic == 0) {
+                short rseed[3];
+
+                arc4random_buf(rseed, sizeof rseed);
+                return ldexp((double) rseed[0], -48) +
+                       ldexp((double) rseed[1], -32) +
+                       ldexp((double) rseed[2], -16);
+        }
         return erand48(__rand48_seed);
 }