From ed2bca389bc1c7532bcc098d1ded9b4b0001de39 Mon Sep 17 00:00:00 2001
From: Vishvananda Ishaya <vishvananda@gmail.com>
Date: Thu, 8 Nov 2012 16:47:31 -0800
Subject: [PATCH] fix waitpid returning (0, 0)

---
 eventlet/green/os.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eventlet/green/os.py b/eventlet/green/os.py
index 5aa52af..7ecd1ba 100644
--- a/eventlet/green/os.py
+++ b/eventlet/green/os.py
@@ -77,7 +77,7 @@ def waitpid(pid, options):
         new_options = options | os_orig.WNOHANG
         while True:
             rpid, status = __original_waitpid__(pid, new_options)
-            if status >= 0:
+            if rpid and status >= 0:
                 return rpid, status
             greenthread.sleep(0.01)