From 06afac6c5740bb81d2b7ab9639d2b08cccf77d33 Mon Sep 17 00:00:00 2001
From: pxinwr <peixing.xin@windriver.com>
Date: Tue, 8 Dec 2020 04:41:12 +0800
Subject: bpo-41462: Add os.set_blocking() support for VxWorks RTOS (GH-21713)

---
 Python/fileutils.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'Python')

diff --git a/Python/fileutils.c b/Python/fileutils.c
index b589d7390d..ac38282117 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -2070,7 +2070,9 @@ _Py_get_blocking(int fd)
 int
 _Py_set_blocking(int fd, int blocking)
 {
-#if defined(HAVE_SYS_IOCTL_H) && defined(FIONBIO)
+/* bpo-41462: On VxWorks, ioctl(FIONBIO) only works on sockets.
+   Use fcntl() instead. */
+#if defined(HAVE_SYS_IOCTL_H) && defined(FIONBIO) && !defined(__VXWORKS__)
     int arg = !blocking;
     if (ioctl(fd, FIONBIO, &arg) < 0)
         goto error;
-- 
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