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-rw-r--r--Python/fileutils.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/Python/fileutils.c b/Python/fileutils.c
index b589d73..ac38282 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;