From 66f600ed3d9f22c2aa6790002507d0c821a7fd0c Mon Sep 17 00:00:00 2001
From: Paula Gombar <gombarica@gmail.com>
Date: Tue, 8 Dec 2020 18:38:33 -0800
Subject: [PATCH 2/3] handle py3.9 check in future.py

---
 azurelinuxagent/common/future.py         | 13 ++++++++++++-
 azurelinuxagent/common/osutil/bigip.py   |  8 +++-----
 azurelinuxagent/common/osutil/default.py |  9 ++-------
 3 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/azurelinuxagent/common/future.py b/azurelinuxagent/common/future.py
index 577fb12e186e..0f76aceba786 100644
--- a/azurelinuxagent/common/future.py
+++ b/azurelinuxagent/common/future.py
@@ -103,4 +103,15 @@ def get_openwrt_platform():
             elif product_matches:
                 if product_matches.group(1) == "OpenWrt":
                     result[0] = "openwrt"
-    return result
\ No newline at end of file
+    return result
+
+
+def array_to_string_or_bytes(buffer):
+    # Python 3.9 removed the tostring() method on arrays, the new alias is tobytes()
+    if sys.version_info[0] == 2:
+        return buffer.tostring()
+
+    if sys.version_info[0] == 3 and sys.version_info[1] <= 8:
+        return buffer.tostring()
+
+    return buffer.tobytes()
diff --git a/azurelinuxagent/common/osutil/bigip.py b/azurelinuxagent/common/osutil/bigip.py
index ceadf8ca2066..cc1b64143c12 100644
--- a/azurelinuxagent/common/osutil/bigip.py
+++ b/azurelinuxagent/common/osutil/bigip.py
@@ -24,6 +24,8 @@ import socket
 import struct
 import time
 
+from azurelinuxagent.common.future import array_to_string_or_bytes
+
 try:
     # WAAgent > 2.1.3
     import azurelinuxagent.common.logger as logger
@@ -280,12 +282,8 @@ class BigIpOSUtil(DefaultOSUtil):
         if retsize == (expected * struct_size):
             logger.warn(('SIOCGIFCONF returned more than {0} up '
                          'network interfaces.'), expected)
-        try:
-            # Python 3.9 removed the tostring() method on arrays, tobytes() is the new alias
-            sock = buff.tostring()
-        except AttributeError:
-            sock = buff.tobytes()
 
+        sock = array_to_string_or_bytes(buff)
         for i in range(0, struct_size * expected, struct_size):
             iface = self._format_single_interface_name(sock, i)
 
diff --git a/azurelinuxagent/common/osutil/default.py b/azurelinuxagent/common/osutil/default.py
index 6179061756e3..c1ca15cf64ef 100644
--- a/azurelinuxagent/common/osutil/default.py
+++ b/azurelinuxagent/common/osutil/default.py
@@ -41,7 +41,7 @@ import azurelinuxagent.common.utils.fileutil as fileutil
 import azurelinuxagent.common.utils.shellutil as shellutil
 import azurelinuxagent.common.utils.textutil as textutil
 from azurelinuxagent.common.exception import OSUtilError
-from azurelinuxagent.common.future import ustr
+from azurelinuxagent.common.future import ustr, array_to_string_or_bytes
 from azurelinuxagent.common.utils.cryptutil import CryptUtil
 from azurelinuxagent.common.utils.flexible_version import FlexibleVersion
 from azurelinuxagent.common.utils.networkutil import RouteEntry, NetworkInterfaceCard
@@ -758,12 +758,7 @@ class DefaultOSUtil(object):
             logger.warn(('SIOCGIFCONF returned more than {0} up '
                          'network interfaces.'), expected)
 
-        try:
-            # Python 3.9 removed the tostring() method on arrays, tobytes() is the new alias
-            ifconf_buff = buff.tostring()
-        except AttributeError:
-            ifconf_buff = buff.tobytes()
-
+        ifconf_buff = array_to_string_or_bytes(buff)
         ifaces = {}
         for i in range(0, array_size, struct_size):
             iface = ifconf_buff[i:i+IFNAMSIZ].split(b'\0', 1)[0]
-- 
2.26.2