From: "Larry Hall (Cygwin)" <reply-to-list-only-lh@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: NTFS write-protect flag translation (tar? rsync?) only one-way?
Date: Tue, 05 Apr 2011 21:46:00 -0000 [thread overview]
Message-ID: <4D9B3A18.1050602@cygwin.com> (raw)
In-Reply-To: <003c01cbf364$23257e50$69707af0$@com.au>
On 4/5/2011 3:36 AM, Christian Gelinek wrote:
> Hi everyone,
>
> I have a problem with the tar command with the "extract permissions
> information" option being set.
>
> I am running Cygwin (CYGWIN_NT-6.1-WOW64 1.7.8(0.236/5/3) 2011-03-01 09:36)
> under Windows 7 (Windows 7 Professional N Ver 6.1 Build 7600) with NTFS and
> the CYGWIN=ntsec environment variable.
>
> It appears that when tar reads files for adding to archives, it correctly
> interprets the Windows-set "R" attribute, which is also seen by ls under
> Cygwin. After extracting the files using tar though, only Cygwin's ls
> command seems to be aware of the read-only attribute; the attrib command (as
> well as Explorer and other Windows-apps) see and handle the file as being
> writeable.
The read-only attribute is a "Windows" thing. Cygwin's utilities focus on
supporting POSIXy/Linuxy ways of doing things. You can't expect Cygwin's
tools to manage all of Window's permission facilities in the same way as
Windows does. The read-only flag is one case where you'll see a divergence.
If you need that flag set, you'll need your own wrapper to set it based on
the POSIX (or ACL) permissions. The read-only attribute really is quite
anachronistic though IMO. It conflicts with the more powerful ACLs. If
you have the option, it's better not to use that flag.
--
Larry
_____________________________________________________________________
A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?
--
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next prev parent reply other threads:[~2011-04-05 15:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-05 13:04 Christian Gelinek
2011-04-05 21:46 ` Larry Hall (Cygwin) [this message]
2011-04-06 6:16 Christian Gelinek
2011-04-06 6:54 ` Larry Hall (Cygwin)
2011-04-07 6:01 ` Christian Gelinek
2011-04-18 10:25 ` Corinna Vinschen
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