Re: POSIX permission mapping and NULL SIDs

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

On Jun 24 23:03, Bill Zissimopoulos wrote:
> On 6/24/16, 3:53 PM, "cygwin-owner@cygwin.com on behalf of Bill
> Zissimopoulos" <cygwin-owner@cygwin.com on behalf of
> billziss@navimatics.com> wrote:
> 
> 
> >One caveat is that Cygwin already maps S-1-5-7 to uid 7. So does that mean
> >that 7==nobody in Cygwinâs case?
> 
> Here is output from Cygwin/SSHFS after mapping ânobody/nogroupâ to S-1-5-7:
> <<
> billziss@windows:~$ cd /cygdrive/y
> billziss@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@windows:/cygdrive/y$ cacls Foo.txt /S
> Y:\Foo.txt 
> "D:P(A;;0x1f019f;;;S-1-5-21-383059176-2062642591-2866287538-1001)(A;;FR;;;A
> N)(A;;FR;;;WD)"
> 
> billziss@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@windows:/cygdrive/y$
> 
> >>
> 
> 
> 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

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

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