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Subject: Re: Accessing SMB share as wrong user?
To: cygwin AT cygwin DOT com
References: <7f4eb950-de06-2981-c9b4-fd345c11ffb3 AT dd-b DOT net> <e0a75a70-9835-f12e-cba2-c91cfc656946 AT dd-b DOT net> <940871db-07d8-6528-bef3-f2630a89c505 AT SystematicSw DOT ab DOT ca>
From: David Dyer-Bennet <dd-b AT dd-b DOT net>
Message-ID: <704def19-dfa4-1ebc-512e-fae23199f7a6@dd-b.net>
Date: Mon, 29 May 2017 13:37:12 -0500
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On 5/29/2017 12:45, Brian Inglis wrote:
> On 2017-05-29 11:16, David Dyer-Bennet wrote:
>> A simpler case demonstrating this; X0 is a new share (created just
>> for testing this) with no prior history, nothing manually set.
>> (Server is FreeNAS, current version).
>> From the beginning, when it first sees it, it shows the file owners 
>> and groups weirdly.
>> And then it's able to create a file and write to it *once*, but
>> can't then append to it???
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ id
>> uid=197608(David Dyer-Bennet) gid=197121(None)
>> groups=197121(None),197609(Ssh
>> Users),545(Users),4(INTERACTIVE),66049(CONSOLE LOGON),11(Authenticated
>> Users),15(This Organization),113(Local account),66048(LOCAL),262154(NTLM
>> Authentication),401408(Medium Mandatory Level)
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ ls -ld .
>> drwxrwxr-x+ 1 Unknown+User Unix_Group+1001 0 May 29 11:55 .
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ getfacl .
>> # file: .
>> # owner: Unknown+User
>> # group: Unix_Group+1001
>> user::rwx
>> group::rwx
>> other:r-x
>> default:user::rwx
>> default:group::rwx
>> default:group:Unix_Group+1001:rwx
>> default:mask:rwx
>> default:other:r-x
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ echo something > foobar
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ ls -l foobar
>> ----r--r-- 1 Unknown+User Unix_Group+1001 10 May 29 12:11 foobar
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ getfacl foobar
>> # file: foobar
>> # owner: Unknown+User
>> # group: Unix_Group+1001
>> user::---
>> group::r--
>> other:r--
>> David Dyer-Bennet AT DDB4 //fsfs/x0
>> $ echo more >> foobar
>> -bash: foobar: Permission denied
> 
> See Cygwin User's Guide section on Switching the user context:
> $ cygstart
> /usr/share/doc/cygwin-2.8.0/html/cygwin-ug-net/ntsec.html#ntsec-setuid-overview
> OR
> $ cygstart https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-setuid-overview

That appears to be instructions on how to temporarily, in code, act as
another user.  My problem is that when I create a Bash shell, it
accesses network drives as the wrong user.  It may be possible for me to
write a version of Bash that switches to the right (default) user using
that information, but why is it *necessary*?  Local drives are accessed
fine.



-- 
David Dyer-Bennet <dd-b AT dd-b DOT net>
http://dd-b.net/

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