$OpenBSD: patch-db_nonce_cpp,v 1.2 2011/10/03 16:38:21 fgsch Exp $
--- db/nonce.cpp.orig	Sun Sep 11 15:09:34 2011
+++ db/nonce.cpp	Sun Sep 18 21:35:45 2011
@@ -42,7 +42,7 @@ namespace mongo {
         massert( 10353 ,  "can't open dev/urandom", _devrandom->is_open() );
 #elif defined(_WIN32)
         srand(curTimeMicros()); // perhaps not relevant for rand_s but we might want elsewhere anyway
-#else
+#elif !defined(__openbsd__)
         srandomdev();
 #endif
 
@@ -63,6 +63,8 @@ namespace mongo {
         assert( rand_s(&a) == 0 );
         assert( rand_s(&b) == 0 );
         n = (((unsigned long long)a)<<32) | b;
+#elif defined(__openbsd__)
+        n = arc4random();
 #else
         n = (((unsigned long long)random())<<32) | random();
 #endif