Re: RFC2307 accounts

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

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On Mar  9 12:50, Marc Rechte wrote:
> Le 09/03/2016 12:27, Corinna Vinschen a écrit :
> >Keep in mind that we have two mappings.  The main mapping is the mapping
> >between Windows SID and a computed uid/gid value used in Cygwin which
> >allows fast mapping in both directions.  A computed value drops the
> >requirement to access an LDAP server for the mapping, which is
> >especially bad when not using AD as mapping server.
> >
> >Please read https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nfs
> >and https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-samba
> >again.  The RFC 2307 mapping only comes into play when reading meta
> >information from an NFS or Samba share.  The unix uid/gid values have to
> >be mapped to a Windows user (better: SID) in the first place, not to the
> >Cygwin uid/gid values.  The actual uid/gid values are irrelevant.  Worse,
> >using the RFC 2307 values might collide with other, computed uid/gid
> >values.
> >
> >
> >Corinna
> >
> 
> OK, I noticed that. Now it brings me a problem using rsync on cygwin.
> 
> On cygwin:
> $ cat /etc/rsyncd.conf
> [test]
>         path = /cygdrive/c/tmp
>         comment = zone de test
>         fake super = yes
>         read only = no
> 
> On the Linux box:
> # ls -l /home/tunix/
> ...
> drwxr-xr-x  3 tunix root                     4096  9 mars  12:23 resto_win
> -rw-rw-r--+ 1 tunix utilisateurs_du_domaine 82882  9 mars  10:56 tmp.ps
> 
> #  rsync -avz --acls --delete /home rsync://192.168.0.23/test
> ..
> # rsync -avz --acls --delete rsync://192.168.0.23/test/home/tunix resto_win/
> ...
> # ls -l /home/tunix/resto_win/tunix/
> ...
> drwx------ 2 1050005 1049089  4096  9 mars  12:14 resto_win
> -rw------- 1 1050005 1049089 82882  9 mars  10:56 tmp.ps

That's an ls -ln, right?  The AD user and group names should have been
resolved.

> You will notice that owner, group and ACLs  are *not* restored properly
> 
> Am I demanding too much to cygwin ?

Off the top of my head, yes.  The rfc2307 uid/gid mapping only works
when accessing the filesystem directly from Cygwin.  By using rsync, the
info is transmitted over the net.


Corinna

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

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