Problem with "None" Group on Non-Domain Members

Mon May 5 15:42:00 GMT 2014

On May 5 11:23, Chris J. Breisch wrote:
> Corinna Vinschen wrote:
> >
> >I wasn't talking about the POSIX permissions, but about the Windows
> >ACL. In your current dir, what does `icacls .' print? Maybe that
> >gives a clue.
>> Mea culpa. I should read better. I could have included that the last time.
>> $ icacls .
> . WIN8-VM\Chris:(F)
> BUILTIN\Users:(RX)
> Everyone:(RX)
> NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(M)
> CREATOR OWNER:(OI)(CI)(IO)(F)
> CREATOR GROUP:(OI)(CI)(IO)(RX)
> Everyone:(OI)(CI)(IO)(RX)
>> Successfully processed 1 files; Failed processing 0 files
>> That doesn't seem too terribly strange to me.
>> >
> >>[...]
> >>Taking the example one step farther:
> >>
> >>$ chmod 600 bar
> >>$ ls -l bar
> >>-rw-rw---- 1 Chris None 0 May 5 10:10 bar
> >>$ chmod 400 bar
> >>$ ls -l bar
> >>-r--r----- 1 Chris None 0 May 5 10:10 bar
> >
> > vmbert8164+lcorinna@vmbert8164 ~
> > $ chmod 400 bar
> >
> > vmbert8164+lcorinna@vmbert8164 ~
> > $ ls -l bar
> > -r-------- 1 vmbert8164+lcorinna vmbert8164+None 0 May 5 16:41 bar
> >
> >So I'd say it's not a generic issue but something in your environment.
> >It would be nice to know what that is, of course. Maybe there's some
> >security setting?!?
> >
>> Thanks for looking into this, Corinna. Apparently this is my
> problem, and not a Cygwin/Windows issue. That's rather odd, because
> the two machines I have tested this on are nothing alike, other than
> both being Windows 8.1 machines. They weren't even set up by the
> same people, or following the same (or any) script.
>> In both cases, I am logging on to the machine with a "Microsoft
> Account": http://www.microsoft.com/en-us/account/default.aspx

Hmm, maybe that's the problem. This "Microsoft Account" stuff might
influence how the underlying OS handles permissions. I would never
touch this stuff ;)
For testing you could try to create a normal local account, add it to
/etc/passwd and run the above under this account. If it behaves
differently (correct, that is), it's a something weird with these MS
accounts. But then again, I wouldn't know how to "fix" this, other 
than to suggest to use a normal account instead.
> I'll dig a little more on my own. I don't want to waste bandwidth on
> the Cygwin list for what appears to be a Stupid User Error.

Nah, at this point we really don't know why this happens on your machine
and it could easily be somebody elses fault.
An strace of `chmod 400 bar' might sched some light on this issue, but I
have a gut feeling the underlying WIndows call will not even return an
error code...
Corinna
-- 
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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