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Reply-To:	Brian DOT Inglis AT SystematicSw DOT ab DOT ca
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>
From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Message-ID:	<940871db-07d8-6528-bef3-f2630a89c505@SystematicSw.ab.ca>
Date:	Mon, 29 May 2017 11:45:09 -0600
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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

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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