Mail Archives: cygwin/2005/08/18/18:23:09
At 12:33 PM 8/17/2005, you wrote:
>I must really be missing something here; I hope someone can give a
>brief explanation and (as a bonus) direct me to where I can find out
>more.
>
>I've been trying to copy files off a Windows XP shared folder in Windows
>explorer, and it keeps telling me that I don't have permission to do
>so. When I look at the files permissions with ATTRIB, I see that it
>is read-only, and when I look at the file with DIR /Q, I see that its
>owner is PENGUIN\dave. That's the username under which I've mounted
>the drive.
>
>So then it occurs to me, maybe Cygwin permissions are getting in the
>way somehow. I do a chmod -R g+r on the directory and presto, I can
>copy files!
>
>What confuses me about this is that:
>
> a. I'm connected as the owner of the file, so why should group
> permissions make any difference?
Dunno. I'd have to see the outpit of 'cals <file>'. Perhaps read
permission has been specifically denied for the group.
> b. Windows XP doesn't seem to have the notion of group permissions.
> I can find "Groups" if I dig hard, in Administrative Tools>
> Computer Management, but I don't see any indication that I can
> set or view group permissions. On the other hand, what are
> Groups for if not controlling access?
Windows has groups. You found'em after all! ;-)
>So, can anyone explain this? Also, is there a comprehensive overview
>of the relationship between the Cygwin and Windows filesystems
>somewhere?
Cygwin doesn't have it's own filesystem. It uses Windows. I think what
you're looking for is information on mapping of Windows ACLS into Cygwin
POSIX permissions. You can check out the Cywgin User's Guide for that
info. This should be a good start:
<http://cygwin.com/cygwin-ug-net/ntsec.html>
--
Larry Hall http://www.rfk.com
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