[sockets] Fixed reading blocking flag

	Calling ioctlsocket() would set the flag...
	Thanks to Thad Thompson for finding this.

diff --git a/mono/io-layer/sockets.c b/mono/io-layer/sockets.c
index 2a88bd49ed7a7ea0a10abdd5be36a88a3f65114c..e9eaf19f47a46c52d324fd6a49e1426431b7746a 100644 (file)
--- a/mono/io-layer/sockets.c
+++ b/mono/io-layer/sockets.c
@@ -716,15 +716,15 @@ int _wapi_send(guint32 fd, const void *msg, size_t len, int send_flags)
                g_message ("%s: send error: %s", __func__, strerror (errno));
 #endif
 
+#ifdef O_NONBLOCK
                /* At least linux returns EAGAIN/EWOULDBLOCK when the timeout has been set on
                 * a blocking socket. See bug #599488 */
                if (errnum == EAGAIN) {
-                       gboolean nonblock;
-
-                       ret = ioctlsocket (fd, FIONBIO, (gulong *) &nonblock);
-                       if (ret != SOCKET_ERROR && !nonblock)
+                       ret = fcntl (fd, F_GETFL, 0);
+                       if (ret != -1 && (ret & O_NONBLOCK) == 0)
                                errnum = ETIMEDOUT;
                }
+#endif /* O_NONBLOCK */
                errnum = errno_to_WSA (errnum, __func__);
                WSASetLastError (errnum);