From 101cbb7cb3db72e499cc35d9319dac30b653d25b Mon Sep 17 00:00:00 2001
From: ache <ache@FreeBSD.org>
Date: Mon, 21 Jul 2008 12:44:47 +0000
Subject: Decrease arc4_count only when needed and with proper bytes amount.

Obtained from:  OpenBSD
---
 lib/libc/gen/arc4random.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/libc')

diff --git a/lib/libc/gen/arc4random.c b/lib/libc/gen/arc4random.c
index c9f1e7f..6aa2323 100644
--- a/lib/libc/gen/arc4random.c
+++ b/lib/libc/gen/arc4random.c
@@ -167,7 +167,7 @@ arc4_check_init(void)
 static void
 arc4_check_stir(void)
 {
-	if (!rs_stired || --arc4_count == 0) {
+	if (!rs_stired || arc4_count <= 0) {
 		arc4_stir(&rs);
 		rs_stired = 1;
 	}
@@ -202,6 +202,7 @@ arc4random(void)
 	arc4_check_init();
 	arc4_check_stir();
 	rnd = arc4_getword(&rs);
+	arc4_count -= 4;
 	THREAD_UNLOCK();
 
 	return (rnd);
-- 
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