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X-HELO:	calimero.vinschen.de
Date:	Tue, 28 Jun 2016 13:41:50 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Repairing permissions after windows reinstall
Message-ID:	<20160628114150.GA25348@calimero.vinschen.de>
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On Jun 28 12:08, Henry S. Thompson wrote:
> Corinna Vinschen writes:
>=20
> > On Jun 28 11:04, Henry S. Thompson wrote:
> >> Good news: My cygwin file tree survived a Windows (10) reinstall
> >> Not-so-good news: I have a new SID, so not only do I not own those fil=
es
> >> any more (that's easily fixed), but I don't have the permissions I
> >> should, because they are now held by some miscellaneous old SID.
> >>=20
> >> In fact I see _two_ raw SIDs when I look at the security tab for any
> >> directory in the old cygwin tree: one has Full control, and the other
> >> just Read & execute.
> >>=20
> >> I presume the first is the old me, what's the second?
> >>=20
> >> Can this be easily fixed, i.e. put me back where I used to be?
> >
> > Off the top of my head, what you could do is this:
> >
> > - Generate an /etc/passwd entry for your old user SID by hand.
> >   Make sure to use an arbitrary weird UID like 98765.
> >
> > - Exit and start an elevated shell.
> >
> > - find . -uid 98765 | xargs chown <newuser name or UID>
> >
> > Analog for the group if necessary.
>=20
> Thanks, but ownership is not the problem.  The problem is that the ACLs
> (as reported by Windows itself via the Security tab) don't allow the new
> me (or OWNER) the necessary (or indeed any) permissions, those are given
> to the old SID.

Ok, hmm.  In that case you could check the current permissions
with getfacl and then call setfacl with a modified ACL giving the
owner the permissions of user 98765 while at the same time remove=20
the entry for user 98765.  It's just a bit of shell script hacking.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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