The return value on success of fcntl(F_SETFL) is not actually specified,

only that it returns -1 on failure.

pointed out by guenther@

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/libcrypto/bio/b_sock.c b/src/lib/libcrypto/bio/b_sock.c
index 81c48a6e5c..34e5d9830e 100644
--- a/src/lib/libcrypto/bio/b_sock.c
+++ b/src/lib/libcrypto/bio/b_sock.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: b_sock.c,v 1.57 2014/10/13 02:39:09 bcook Exp $ */
+/* $OpenBSD: b_sock.c,v 1.58 2014/10/13 02:49:53 bcook Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -462,8 +462,8 @@ BIO_socket_nbio(int s, int mode)
 {
         int flags = fcntl(s, F_GETFD);
         if (mode && !(flags & O_NONBLOCK))
-                return (fcntl(s, F_SETFL, flags | O_NONBLOCK) == 0);
+                return (fcntl(s, F_SETFL, flags | O_NONBLOCK) != -1);
         else if (!mode && (flags & O_NONBLOCK))
-                return (fcntl(s, F_SETFL, flags & ~O_NONBLOCK) == 0);
+                return (fcntl(s, F_SETFL, flags & ~O_NONBLOCK) != -1);
         return (1);
 }