From 228ed87e2f4b7314e4cfb67ee462550c5f20edef Mon Sep 17 00:00:00 2001
From: Jeff Forcier <jeff@bitprophet.org>
Date: Sat, 30 Jul 2016 13:28:11 -0700
Subject: Untested fix re #789

---
 paramiko/proxy.py | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'paramiko/proxy.py')

diff --git a/paramiko/proxy.py b/paramiko/proxy.py
index d3ae436f..5f7f0023 100644
--- a/paramiko/proxy.py
+++ b/paramiko/proxy.py
@@ -107,5 +107,14 @@ class ProxyCommand(ClosingContextManager):
     def close(self):
         os.kill(self.process.pid, signal.SIGTERM)
 
+    @property
+    def closed(self):
+        return self.process.returncode is not None
+
+    @property
+    def _closed(self):
+        # Concession to Python 3 socket-like API
+        return self.closed
+
     def settimeout(self, timeout):
         self.timeout = timeout
-- 
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