From 317e0c99e3804310f4bee23e497d9d84b717d7f7 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 29 Oct 2021 08:24:41 -0700
Subject: [PATCH] [3.9] bpo-45628: Check all parts of the suffix for an
 extension match. (GH-29310) (GH-29313)

---
 Lib/logging/handlers.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index 7f1f10551c30..f8040c498c10 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -368,8 +368,13 @@ class TimedRotatingFileHandler(BaseRotatingHandler):
         for fileName in fileNames:
             if fileName[:plen] == prefix:
                 suffix = fileName[plen:]
-                if self.extMatch.match(suffix):
-                    result.append(os.path.join(dirName, fileName))
+                # See bpo-45628: The date/time suffix could be anywhere in the
+                # filename
+                parts = suffix.split('.')
+                for part in parts:
+                    if self.extMatch.match(part):
+                        result.append(os.path.join(dirName, fileName))
+                        break
         if len(result) < self.backupCount:
             result = []
         else:
-- 
2.47.3