1 files changed, 15 insertions, 6 deletions

diff --git a/src/lib/libc/crypt/arc4random.c b/src/lib/libc/crypt/arc4random.c
index e921e4b7c7..7580e39fb5 100644
--- a/src/lib/libc/crypt/arc4random.c
+++ b/src/lib/libc/crypt/arc4random.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: arc4random.c,v 1.20 2008/10/03 18:46:04 otto Exp $    */
+/*      $OpenBSD: arc4random.c,v 1.21 2009/12/15 18:19:06 guenther Exp $        */
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -109,7 +109,6 @@ arc4_stir(void)
         len = sizeof(rnd);
         sysctl(mib, 2, rnd, &len, NULL, 0);
 
-        arc4_stir_pid = getpid();
         arc4_addrandom(rnd, sizeof(rnd));
 
         /*
@@ -121,6 +120,18 @@ arc4_stir(void)
         arc4_count = 1600000;
 }
 
+static void
+arc4_stir_if_needed(void)
+{
+        pid_t pid = getpid();
+
+        if (arc4_count <= 0 || !rs_initialized || arc4_stir_pid != pid)
+        {
+                arc4_stir_pid = pid;
+                arc4_stir();
+        }
+}
+
 static inline u_int8_t
 arc4_getbyte(void)
 {
@@ -170,8 +181,7 @@ arc4random(void)
         u_int32_t val;
         _ARC4_LOCK();
         arc4_count -= 4;
-        if (arc4_count <= 0 || !rs_initialized || arc4_stir_pid != getpid())
-                arc4_stir();
+        arc4_stir_if_needed();
         val = arc4_getword();
         _ARC4_UNLOCK();
         return val;
@@ -182,8 +192,7 @@ arc4random_buf(void *_buf, size_t n)
 {
         u_char *buf = (u_char *)_buf;
         _ARC4_LOCK();
-        if (!rs_initialized || arc4_stir_pid != getpid())
-                arc4_stir();
+        arc4_stir_if_needed();
         while (n--) {
                 if (--arc4_count <= 0)
                         arc4_stir();