Re: [PATCH V2] xfstests: generic/313, test sgid inheritance on subdirs

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> > 
> > generic/313      - output mismatch (see /root/xfstests/results/generic/313.out.bad)
> >     --- tests/generic/313.out   2013-07-08 16:27:41.787710646 -0500
> >     +++ /root/xfstests/results/generic/313.out.bad      2013-07-08 16:47:46.052683735 -0500
> >     @@ -1,3 +1,3 @@
> >      QA output created by 313
> >     -drwxr-sr-x. TEST_DIR/313-dir/subdir
> >     +drwxr-sr-x TEST_DIR/313-dir/subdir
> >      drwxrwsr-x+ TEST_DIR/313-dir/subdir2
> >      ...
> >      (Run 'diff -u tests/generic/313.out /root/xfstests/results/generic/313.out.bad' to see the entire diff)
> > 
> > Looks like there could be a problem with ls?  Have you seen that?
> > 
> > Thanks,
> > Ben
> > 
> Actually I don't think this is a problem, but the way newer `ls` versions are
> displaying the object permissions (the 'dot' at the end of the permissions,
> indicating there are no extra attributes).
> 
> I'm going to take a look on what's going on, but I still believe it's just a
> matter of add the 'dot' to the xfstests correct output.
> 
> I had this same problem when testing my patch and needed to fix it locally, but
> missed to warn you guys, my apologies
> 
Just a matter of information:

>From coreutils:

commit b3677e5e383103bf1764b2c8a9329b1c17934b24
Author: Jim Meyering <meyering@xxxxxxxxxx>
Date:   Wed Apr 2 22:26:45 2008 +0200

    ls: use '.' (not +) as SELinux-only alt. access flag in ls -l output



So, this test is selinux dependent, it will provide different outputs whether
the system has selinux enabled or not.

Since the test itself creates their own directories, checking if the selinux is
enabled or not and checking the proper output depending on selinux activity
should avoid false positives on this test. I.e. if the selinux is enabled, the
`ls -l` output will print the 'dot' at the end of the permissions, otherwise,
nothing will be printed and Eric's test will pass without problem.

I think this is something worth to mention on xfstests README or some other
documentation, mainly because any kind of test like this, but done with the
TEST_DEV might be even worst since we don't recreate the filesystem while using
TEST_DEV, so, objects there can be created with selinux attrs or not (if created
when selinux is disabled) and have the attributes added later.

I'm probably being too paranoid here talking about the TEST_DEV, but, I thought
it was worth to mention.

Cheers.

-- 
Carlos

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