From 84fd2d1d61205018c18448b11808c84f6f8b4dd6 Mon Sep 17 00:00:00 2001
From: kosaki <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 18 Oct 2015 05:43:08 +0000
Subject: * random.c (fill_random_bytes_urandom): add a comment why using  
 O_NONBLOCK and O_NOCTTY.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 random.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'random.c')

diff --git a/random.c b/random.c
index 3fcc4243e6..e73e3dec06 100644
--- a/random.c
+++ b/random.c
@@ -455,6 +455,11 @@ random_init(int argc, VALUE *argv, VALUE obj)
 static int
 fill_random_bytes_urandom(void *seed, size_t size)
 {
+    /*
+      O_NONBLOCK and O_NOCTTY is meaningless if /dev/urandom correctly point
+      to urandom device. But it protect from several strange hazard if
+      /dev/urandom is not urandom device.
+    */
     int fd = rb_cloexec_open("/dev/urandom",
 # ifdef O_NONBLOCK
 			     O_NONBLOCK|
-- 
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