Fix a bug where random() always returns 0 when srandom() is seeded

with 0.  Use 1 and not 0 as the first element of the state array,
similar to what glibc does.  OK nicm@

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libc/stdlib/random.c b/src/lib/libc/stdlib/random.c
index 48e892042b..5a9a7c3313 100644
--- a/src/lib/libc/stdlib/random.c
+++ b/src/lib/libc/stdlib/random.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: random.c,v 1.15 2005/11/30 07:51:02 otto Exp $ */
+/*      $OpenBSD: random.c,v 1.16 2012/03/21 12:36:49 millert Exp $ */
 /*
  * Copyright (c) 1983 Regents of the University of California.
  * All rights reserved.
@@ -196,7 +196,8 @@ srandom(unsigned int x)
         if (rand_type == TYPE_0)
                 state[0] = x;
         else {
-                state[0] = x;
+                /* A seed of 0 would result in state[] always being zero. */
+                state[0] = x ? x : 1;
                 for (i = 1; i < rand_deg; i++) {
                         /*
                          * Implement the following, without overflowing 31 bits: