Re: Problems with file permissions and cp when running on Vista

[Marco Atzeri <marco_atzeri at yahoo dot it>]

--- Tom Quarendon  ha scritto:

> Larry Hall (Cygwin) wrote:
> > I'd start at the source.  Give yourself
> POSIX-style access to the files
> > to start with.  'cp' will preserve that access. 
> 'cp' and many other
> > utilities don't take ACL permissions into account.
>  They are silently
> > ignored.  For whatever reason, it looks like your
> source file has no
> > POSIX permissions for user, group, and other.  Fix
> that with 'chmod'
> > and I think you'll have solved your problem.
> >
> 
> I struggle to give myself posix style permissions.
> I have a file README.txt in the root of my build
> source tree:
> $ getfacl README.txt
> # file: README.txt
> # owner: Tom
> # group: None
> user::---
> group::---
> group:SYSTEM:rwx
> group:Administrators:rwx
> group:Users:r-x
> mask:rwx
> other:---
> 
> If I then do chmod --
> $ chmod 755 README.txt
> chmod: changing permissions of `README.txt':
> Permission denied
> 
> I can't modify the file with VI, but I can CAT it,
> so cygwin thinks I've 
> got read access to the file somehow. Copy the file
> and I get no 
> permissions at all.
> 
> I do have write access to the file though as far as
> windows is 
> concerned. If I look at the security properties of
> the file from Windows 
> Explorer it looks as though I'm getting write
> permission on the file 
> because I'm a member of "Authenticated Users" and
> that has write access. 
> "Authenticated Users" doesn't appear in the output
> from getfacl. Maybe 
> that's my issue.
> 
> So I'm not sure how I set myself up with correct
> posix permissions on 
> this file so that CP will work.
> 

to manage ACL outside cygwin I found setacl useful

http://setacl.sourceforge.net/

it is a bit cryptic but solved some of my problems.

Sometime also psgetsid was needed, to have 
the cross reference between SID and users

http://technet.microsoft.com/en-us/sysinternals/bb897417.aspx



Regards
Marco


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