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Date: Thu, 30 Apr 2015 04:11:08 -0700
Message-ID: <CAOC2fq8iArHbVJzBcdrCFUNf4uTwt9b-2=WN82uyryFox6vVEw@mail.gmail.com>
Subject: Re: Trouble with Git 2.1.x pushing to repos over Samba
From: Michael Enright <mike AT kmcardiff DOT com>
To: cygwin AT cygwin DOT com
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Corinna,

Do you think the snapshot would change the outcome in my case?

I haven't used a snapshot before. Is there a tutorial on how to get
onto and off of a snapshot? Or should I test by using a VM?

I myself am going to be on a short vacation and compressing too much
into tomorrow to do anything with a snapshot very soon.


On Thu, Apr 30, 2015 at 3:56 AM, Corinna Vinschen
<corinna-cygwin AT cygwin DOT com> wrote:
> Hi John,
>
> On Apr 30 18:44, John Orr wrote:
>> > From: "Michael Enright"
>> > $ git push origin master
>> > fatal: '//host/path/to/repo.git/' does not appear to be a git repository
>> > fatal: Could not read from remote repository.
>> [...]
>> #: john AT johndesktop:/cygdrive/l ; ls -ld .git/objects/
>> drwxr-xr-x 1 john Unix_Group+1000 0 Nov 13 14:13 .git/objects/
>>
>> (albeit, Corinna, with my group issue still not yet resolved)
>
> You tried the /etc/group tweak as I suggested in my latest mail in that
> thread, I take it?
>
>> access(/cygdrive/l/.git, R_OK) returned 0
>> access(/cygdrive/l/.git, W_OK) returned 0
>> access(/cygdrive/l/.git, X_OK) returned -1
>>
>> The last test is the one run by git, that makes it reject my /cygdrive/l/.git directory.
>>
>> Not sure if that's relevant, but just in case.
>
> Thanks for the info.  I found a really dumb bug in my code.  The
> access() function is using a Windows function for access checking under
> the hood.  To account for the Samba account mapping in Cygwin, there's
> a function converting the S-1-22-x-y SIDs in the file's ACL to Windows
> SIDs if there *is* a mapping.  But I made a small mistake which has
> a big result: The ACL is not completly copied over, thus the Windows
> function has to deal with an incomplete ACL.
>
> I fixed that in the git repo and uploaded new snapshots to
> https://cygwin.com/snapshots/  Please give them a try.  Don't use the
> snapshots for anything else for the time being!
>
>   PLEASE TEST ASAP AND REPORT BACK!
>
>   I'll be unavailable for a few weeks starting tomorrow, so I'd like to
>   do a bugfix Cygwin release, preferredly today, if this patch works as
>   desired.
>
>
> Thanks,
> Corinna
>
>
> P.S.: As a side-note: While this patch (hopefully) reverts this code to
>       work as pre-1.7.34, it seems that the internal Windows access
>       check function is not quite up to the task for Samba shares in
>       scenarios as John's one.  It will always report back the access of
>       the "others" part of POSIX permission bits.  Only with the new
>       mapping of S-1-22-x-y SIDs to real WIndows accounts, or with
>       winbindd-supported mapping, the Windows access check will really
>       work as desired.
>
> --
> Corinna Vinschen                  Please, send mails regarding Cygwin to
> Cygwin Maintainer                 cygwin AT cygwin DOT com
> Red Hat

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