[Rdiff-backup-bugs] [bug #39476] regression error on encfs destination with long filename

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?39476>

                 Summary: regression error on encfs destination with long
filename
                 Project: rdiff-backup
            Submitted by: None
            Submitted on: Fr 12 Jul 2013 20:41:18 UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hello,

After an aborted backup I always get this error:

 Previous backup seems to have failed, regressing destination now.
 ...
 AssertionError: Bad index order: ('long_filename_data', '1') >= ('b',)

I append a patch with this bug report. It cures the error but I did not check
whether the regression is doing now what it is intended to do. The error is
caused by filenames which are to long to be saved on the target directory.
Rdiff-backup uses the 'AlternateMirrorName' technique in this case. My target
directory is an encfs encrypted directory with filename encryption. Filenames
are limited to 189 bytes.

Here are my findings. Line 275 of rorpiter.py throws the error. The line test
for the index order. The index order is an alphabetical filename order. Line
255 of longname.py opens a new 'mirror_rp' with 'index'
,,('long_filename_data', '1')'' for regression. This index is used for the
index test but it should be tested against the long filename related to this
regression.

In my example the long filename is 190 bytes 'a190byteaaaa...aaa'. A second
file following the long file name is necessary to throw the error. I use
filename 'b'. The error only occurs if both files are alphabetically placed
before the string 'long_filename_data'.

my system:
 Debian 7.1
 rdiff-backup 1.2.8

I know, this is more or less an auto information list. V1.2.8 is from 2009.
Should I post the bug report on Debian to get the patch publicized?


Many thanks to the developers of rdiff-backup!!!

Christian





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File Attachments:


-------------------------------------------------------
Date: Fr 12 Jul 2013 20:41:18 UTC  Name: long-filename-regression.patch  Size:
571B   By: None

<http://savannah.nongnu.org/bugs/download.php?file_id=28557>

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