From 0a19061141de1fb70c5e3dc1a5e47f11f5b068fe Mon Sep 17 00:00:00 2001
From: Dan Prince <dprince@redhat.com>
Date: Thu, 15 Mar 2012 13:28:20 -0400
Subject: [PATCH] Add error checking to get_terminal_size.

Adds returncode error checking to get_terminal_size so that
it doesn't spew errors to console when running glance commands
in a shell without a TTY.

Fixes LP Bug #956202.

Change-Id: I42e155d168da1f4f25c0dea9ad9768686bd654ce
---
 glance/common/utils.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/glance/common/utils.py b/glance/common/utils.py
index 32ed731fa7..eaebd3a464 100644
--- a/glance/common/utils.py
+++ b/glance/common/utils.py
@@ -326,7 +326,9 @@ def _get_terminal_size_posix():
                 p = subprocess.Popen(['stty', 'size'],
                                     shell=False,
                                     stdout=subprocess.PIPE)
-                return tuple(int(x) for x in p.communicate()[0].split())
+                result = p.communicate()
+                if p.returncode == 0:
+                    return tuple(int(x) for x in result[0].split())
             except:
                 pass