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X-HELO: calimero.vinschen.de
Date: Mon, 27 Jun 2016 12:29:08 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: POSIX permission mapping and NULL SIDs
Message-ID: <20160627102908.GB8258@calimero.vinschen.de>
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References: <D392BA70.95D4%billziss AT navimatics DOT com> <20160624195144 DOT GB27089 AT calimero DOT vinschen DOT de> <D392F074.962E%billziss AT navimatics DOT com> <20160624215948 DOT GD27089 AT calimero DOT vinschen DOT de> <CACoZoo3xsGPqiEXzAXHVjsG_hrO6Sd-thTPh3RC_0i==rPgCKw AT mail DOT gmail DOT com> <D39302CC.9684%billziss AT navimatics DOT com> <D3930943.96B5%billziss AT navimatics DOT com>
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On Jun 24 23:03, Bill Zissimopoulos wrote:
> On 6/24/16, 3:53 PM, "cygwin-owner AT cygwin DOT com on behalf of Bill
> Zissimopoulos" <cygwin-owner AT cygwin DOT com on behalf of
> billziss AT navimatics DOT com> wrote:
>=20
>=20
> >One caveat is that Cygwin already maps S-1-5-7 to uid 7. So does that me=
an
> >that 7=3D=3Dnobody in Cygwin=E2=80=99s case?
>=20
> Here is output from Cygwin/SSHFS after mapping =E2=80=9Cnobody/nogroup=E2=
=80=9D to S-1-5-7:
> <<
> billziss AT windows:~$ cd /cygdrive/y
> billziss AT windows:/cygdrive/y$ ls -la
> total 8
> drwxr-xr-x 1 billziss ANONYMOUS LOGON  0 Jun 23 23:57 .
> dr-xr-xr-x 1 billziss None             0 Jun 24 15:56 ..
> -rw-r--r-- 1 billziss ANONYMOUS LOGON 15 Jun 23 23:57 Foo.txt
> billziss AT windows:/cygdrive/y$ cacls Foo.txt /S
> Y:\Foo.txt=20
> "D:P(A;;0x1f019f;;;S-1-5-21-383059176-2062642591-2866287538-1001)(A;;FR;;=
;A
> N)(A;;FR;;;WD)"
>=20
> billziss AT windows:/cygdrive/y$ ls -lna
> total 8
> drwxr-xr-x 1 197609      7  0 Jun 23 23:57 .
> dr-xr-xr-x 1 197609 197121  0 Jun 24 15:58 ..
> -rw-r--r-- 1 197609      7 15 Jun 23 23:57 Foo.txt
> billziss AT windows:/cygdrive/y$
>=20
> >>
>=20
>=20
> Opinions?

Let's better not use anonymous.  It could be a security risk.  It might
not do harm, but it also might give unwanted access rights in some
scenarios.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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