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Re: Problem with "None" Group on Non-Domain Members

On 05/05/2014 05:57 PM, Chris J. Breisch wrote:
Larry Hall (Cygwin) wrote:
On 05/05/2014 02:56 PM, Chris J. Breisch wrote:
Corinna Vinschen wrote:
On May 5 12:17, Chris J. Breisch wrote:
Corinna Vinschen wrote:
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...
Attached. Your gut seems to be working today...

There *is* something weird here. Look at this:

151 36702 [main] chmod 5536 alloc_sd: uid 1001, gid 513, attribute
65 36767 [main] chmod 5536 cygsid::debug_print: alloc_sd: owner SID
= S-1-5-21-3514886939-1786686319-3519756147-1001 (+)
70 36837 [main] chmod 5536 cygsid::debug_print: alloc_sd: group SID
= S-1-5-21-3514886939-1786686319-3519756147-1001 (+)

alloc_sd (the underlying function creating a security descriptor) gets
a uid 1001 and gid 513 as input, as usual. But the owner *and* group
SIDs of the file's existing security descriptor is
S-1-5-21-3514886939-1786686319-3519756147-1001, the SID of your user

Why is your user account the primary group of the file, even though
your user token definitely has "None" (513) as its primary group?
How did it get there?

I don't have a clue. You're the expert. :)

I'm wondering if we're getting the user id as the group for the MS
Account because there is no group id. Chris, what does 'id' for
each of these accounts look like and is the group id (assuming they
are different that the user id) in there?

Well, I hope I'm not comparing apples and oranges, because now I'm at home.
However, I have duplicated the scenario and results on this machine. It was
actually where I noticed it first.

id produces expected results:

MS account:
$ id
uid=1001(Chris) gid=513(None) groups=513(None),545(Users),1003(HomeUsers)

Local account:
$ id
uid=1007(cjb) gid=513(None) groups=513(None),545(Users),1003(HomeUsers)


OK, thanks.  That answers my question but doesn't give any insight into
the original issue. :-(



A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?

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