[Bug 67497] Re: Claims success when backup fails

[Mark Walker]

I think I have reproduced the behaviour again on BackupPC 3.0.0-4ubuntu1
on Ubuntu 8.04.3

Following the description:

Results are

/etc/
Backed up where permissions are liberal enough to allow reading the files

The fstab for example has 
 -rw-r--r-- 1 root root 

Enough for tar to read it. Restores Fail. BackupPC reports this.

The shadow file for example - fails to get backed up entirely and does not even show up in the browse backups area even as an empty file.
-rw-r----- 1 root shadow

/home has the same type of behaviour. Only by how liberal the default
umask is, are users home directories able to be backed up. Tied down
permissions will result in missing files with no errors reported.

For my user mwalker a good example of this is that my .ssh folder does
not feature in the Backups. But everything else with liberal perms does.

Failure does not result and the Backup does not stop. So BackupPC claims
success even when some of the files fail to be read.

The only warning sign you get is in the log file one of the lines says:
2009-11-09 14:53:50 full backup 0 complete, 2737 files,  bytes, 29 xferErrs ( bad files,  bad shares, 29 other)

but if the user sees no fail failures why would he have reason to view
the logs.

So yes, the user could come to restore his files and find the ones he
needs were never backed up. I am about to use it in production and
managed to avoid exposure to this problem entirely by using sudo from
the beginning.

Maybe its worth scripting part of the deb to add a few scripts
restrictive tar and rsync with entries to be added to the sudoers file?

Im trying to reason this behaviours existence as to whether its a
genuine bug or just needed to ignore not being able to backup super
sensitive things or locked files - but hang on that would only be useful
for Windows for which a tar backup would need additional setup anyway.

What do you think Ubuntu Bug guys?

-- 
Claims success when backup fails
https://bugs.launchpad.net/bugs/67497
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