From 862543aa85249b46649b60da96743b4b14c6c83b Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@cheimes.de>
Date: Mon, 31 Dec 2007 03:07:24 +0000
Subject: [PATCH] Don't close sys.stdin with quit() if sys.stdin wraps fd 0.
 Otherwise it will raise a warning: Lib/io.py:1221: RuntimeWarning: Trying to
 close unclosable fd

---
 Lib/site.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Lib/site.py b/Lib/site.py
index 4d64d20ccf7..3ba42121f6b 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -247,7 +247,12 @@ def setquit():
             # Shells like IDLE catch the SystemExit, but listen when their
             # stdin wrapper is closed.
             try:
-                sys.stdin.close()
+                fd = -1
+                if hasattr(sys.stdin, "fileno"):
+                    fd = sys.stdin.fileno()
+                if fd != 0:
+                    # Don't close stdin if it wraps fd 0
+                    sys.stdin.close()
             except:
                 pass
             raise SystemExit(code)