From: Daira Hopwood <daira@jacaranda.org>
Date: Tue, 15 Sep 2015 17:31:20 +0000 (+0100)
Subject: replace_file should not fail if replaced_path does not exist.
X-Git-Url: https://git.rkrishnan.org/pf/content/en/seg/biz/?a=commitdiff_plain;h=56da579ea423f85a66e6730cee8edbdf3f531f83;p=tahoe-lafs%2Ftahoe-lafs.git

replace_file should not fail if replaced_path does not exist.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
---

diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py
index 16dda5c0..a12565f3 100644
--- a/src/allmydata/util/fileutil.py
+++ b/src/allmydata/util/fileutil.py
@@ -619,8 +619,11 @@ else:
         if not os.path.exists(replacement_path):
             raise ConflictError("Replacement file not found: %r" % (replacement_path,))
         try:
-            if os.path.exists(replaced_path):
+            try:
                 os.rename(replaced_path, backup_path)
+            except OSError as e:
+                if e.errno != errno.EEXIST:
+                    raise
             rename_no_overwrite(replacement_path, replaced_path)
         except EnvironmentError:
             reraise(ConflictError)