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Date: Sat, 28 Feb 2015 23:25:47 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Too Many Permissions Stripped In 1.7.35?
Message-ID: <20150228222547.GF11124@calimero.vinschen.de>
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On Feb 28 13:32, random user wrote:
> The changes regarding the user SID =3D group SID case look generally good
> to me.
> Thanks for considering the idea.
>=20
> I do wonder if it is best that the Everyone privileges would "leak" into =
the
> group permission mode/mask tho, either at the Posix or ACL levels.  They
> don't
> seem to for user SID !=3D group SID, for those the oddball cases where
> Everyone
> has privileges the owner or group does not get a DENY in their ACL.

They do:

  $ icacls xxx
  xxx VINSCHEN\corinna:(R,W)
      VINSCHEN\vinschen:(Rc,S,RA)
      Everyone:(RX,W)

  Successfully processed 1 files; Failed processing 0 files
  $ ls -l xxx
  -rwxrwxrwx 1 corinna vinschen 0 Feb 28 23:04 xxx


> Perhaps more importantly than that topic: I've noticed what seems a new
> issue in
> the behavior of the user SID !=3D group SID case:
>=20
> rm x
> touch x        # umask =3D 0077, user SID !=3D primary group SID
> chmod 750 x
> chmod -x x  # gets chmod: x: new permissions are rw-r-x---, not rw-r-----

This is perfectly fine, see the same sequence on Linux:

  $ uname -sr
  Linux 3.18.6-200.fc21.x86_64
  $ umask 77
  $ touch xxx
  $ ls -l xxx
  -rw------- 1 corinna vinschen 0 Feb 28 23:17 xxx
  $ chmod 750 xxx
  $ ls -l xxx
  -rwxr-x--- 1 corinna vinschen 0 Feb 28 23:17 xxx
  $ chmod -x xxx
  chmod: xxx: new permissions are rw-r-x---, not rw-r-----


Corinna

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

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