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Date: Mon, 3 Dec 2007 15:18:43 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Can cygwin bypass windows file permissions?
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On Dec  3 14:54, wrbach AT freenet DOT de wrote:
> Hello!
> 
> I have made a file test.txt in d:temp and removed all Windows permissions from it.
> Consequently, I cannot access the file from Windows Explorer or cmd.exe.
> 
> However, if I try the following from a cygwin bash I get the contents of the file
> $cat /cygdrive/d/temp/test.txt
> 
> How can cygwin bypass the windows file permissions, if I have even removed SYSTEM from the Acl:
> $ ls -l test.txt
> ---------- 1 Administratoren SYSTEM 3058 May  4  2006 test.txt
> 
> $ getfacl.exe test.txt
> # file: test.txt
> # owner: Administratoren
> # group: SYSTEM
> user::---
> group::---
> mask:rwx
> other:---
> 
> $ cacls test.txt
> d:temptest.txt

Cygwin opens files with the FILE_OPEN_FOR_BACKUP_INTENT flag, so you get
root-like file access privileges if you're working under an admin account.


Corinna

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

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