From efe2c6f1ba7a558eb65e27b63d5116fb22392a85 Mon Sep 17 00:00:00 2001
From: "Paul J. Dorn" <pajod@users.noreply.github.com>
Date: Sun, 12 May 2024 23:54:38 +0200
Subject: [PATCH] fcntl(fd, O_NONBLOCK) => os.set_blocking(fd, False)

---
 gunicorn/util.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/gunicorn/util.py b/gunicorn/util.py
index 1c2e71d8f..b294d0bc7 100644
--- a/gunicorn/util.py
+++ b/gunicorn/util.py
@@ -5,7 +5,6 @@
 import ast
 import email.utils
 import errno
-import fcntl
 import html
 import importlib
 import inspect
@@ -263,8 +262,10 @@ def close_on_exec(fd):
 
 
 def set_non_blocking(fd):
-    flags = fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK
-    fcntl.fcntl(fd, fcntl.F_SETFL, flags)
+    # available since Python 3.5, equivalent to either:
+    # ioctl(fd, FIONBIO)
+    # fcntl(fd, fcntl.F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK)
+    os.set_blocking(fd, False)
 
 
 def close(sock):