From b7fa5c5abb39f819fbb42253711bc13e5cac0e81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Thu, 1 Jul 2010 11:40:50 +0000
Subject: [PATCH] random_seed: allow to block on /dev/random

If both /dev/random and /dev/urandom failed to return data, an
uninitialised value might be returned.  Since most systems have a
non-blocking /dev/urandom or have /dev/random with similar properties,
the chance of blocking is minimal, and the alternative of returning
non-random data is worse.

Originally committed as revision 23930 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavutil/random_seed.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/libavutil/random_seed.c b/libavutil/random_seed.c
index a2b388549c..b9222fc3ac 100644
--- a/libavutil/random_seed.c
+++ b/libavutil/random_seed.c
@@ -31,9 +31,6 @@ static int read_random(uint32_t *dst, const char *file)
 
     if (fd == -1)
         return -1;
-#if HAVE_FCNTL && defined(O_NONBLOCK)
-    if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) != -1)
-#endif
         err = read(fd, dst, sizeof(*dst));
     close(fd);