Hi Erik,
Sorry for the late reply, looks like I did not notice these bug mail
messages the first time among the spam..
Yes, I confirm that this is either a bug or an undocumented shortcoming,
depending on how you look at it.
As to the why: the -r code was not written to perform a 100% solid
comparison, its main purpose is to discover bit errors on the backup
medium.
The manpage already has something about this:
The -r option verifies the file contents of the files in
the archive against the files on the filesystem, but does
not cross-check details like permission bits on files, nor
does it cross-check that archived directories or other
non-file entities still exist on the filesystem.
but this warning should be extended I guess. A fix would be to stat() the
file on the filesystem when the file in the archive has 0 length.
Cheers,
Koen.
On Wed, 13 Jan 2010, Erik Schanze wrote:
>
> Hi Koen,
>
> [please keep at least 565202-forwar...@bugs.debian.org in CC:]
>
> a Debian user has filed a bugreport against Afio, please see below.
> It seems the problem is, that empty files within Afio archive will not
> be checked against file system.
>
> See afio.c:2938
> ----------8<----------------------------------------8<--------------------
> case S_IFREG:
> /* does not check file permissions and access times */
> if (asb->sb_size == 0)
> return (0);
> ----------8<----------------------------------------8<--------------------
>
> Is this intended behavior?
> If yes, why? And we should document it clearly, I think.
>
> Thank you in advance.
>
> Bye,
> Erik
>
> Christian Schneider Christian Schneider <chschnei...@nurfuerspam.de>:
> > Package: afio
> > Version: 2.5-5
> > Severity: important
> >
> > Hi folks,
> >
> > seems to me, as if the verification of afio archives against the
> > filesystem does not work:
> >
> > $ mkdir foo
> > $ touch foo/A
> > $ find foo/ | afio -o bar.afio
> > $ afio -r bar.afio
> > $ echo $?
> > 0
> > $ echo "baz" >> foo/A
> > $ afio -r bar.afio
> > $ echo $?
> > 0
> >
> > Returns "0" twice!? This is quite severe IMHO. Can you verify this?
> >
> > Thanks in advance.
> >
> > Regards,
> > Christian
> >
> > -- System Information:
> > Debian Release: 5.0.3
> > APT prefers stable
> > APT policy: (500, 'stable')
> > Architecture: amd64 (x86_64)
> >
> > Kernel: Linux 2.6.26-2-amd64 (SMP w/4 CPU cores)
> > Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
> > Shell: /bin/sh linked to /bin/bash
> >
> > Versions of packages afio depends on:
> > ii libc6 2.7-18 GNU C Library: Shared
> > libraries
> >
> > afio recommends no packages.
> >
> > afio suggests no packages.
> >
> > -- no debconf information
> >
> >
>
>
>
>
>
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