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X-HELO:	calimero.vinschen.de
Date:	Sat, 11 Apr 2015 12:23:03 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: [TESTERS needed] New POSIX permission handling
Message-ID:	<20150411102303.GG19111@calimero.vinschen.de>
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On Apr 11 11:40, Corinna Vinschen wrote:
> On Apr 10 19:00, Steven Penny wrote:
> > On Fri, Apr 10, 2015 at 5:07 AM, Corinna Vinschen wrote:
> > > Please give the new code a try.  I uploaded new 2015-04-10 developer
> > > snapshots to https://cygwin.com/snapshots/
> >=20
> > Here is the test I ran:
> >=20
> >     $ cd /cygdrive/c
> >=20
> >     $ touch ~/{alpha,bravo}.sh ~+/{charlie,delta}.sh
> >=20
> >     $ chmod +x ~/bravo.sh ~+/delta.sh
> >=20
> >     $ ls -l --color ~/{alpha,bravo}.sh ~+/{charlie,delta}.sh
> >     -rw-rw-r--+ 1 John None 0 Apr 10 16:51 /cygdrive/c/charlie.sh
> >     -rwxrwxr-x+ 1 John None 0 Apr 10 16:51 /cygdrive/c/delta.sh    (gre=
en)
> >     -rw-r--r--  1 John None 0 Apr 10 16:51 /home/John/alpha.sh
> >     -rwxrwxr-x  1 John None 0 Apr 10 16:51 /home/John/bravo.sh     (gre=
en)
> >=20
> > So "charlie.sh" looks strange because it has that extra write permissio=
n.
> > However this is not a big deal for me. My concern was that everything w=
as
> > showing up executable (green) when running "ls --color". So overall thi=
s is an
> > improvement, thanks.
>=20
> What is '~+'?  Is that some weird bash feature?
>=20
> Did you check the ACL?  The ACL before and after the change should
> explain what happened.

Oh, sorry, you're createsing new files, so there's no before/after.  In
that case the result in the group permission is based on the MASK value
generated as a result of permission inhertance rules.  So what you
should check is the parent descriptor and look at the inheritable ACEs
(default ACL entries in POSIX speak) and compare them with the
permissions Xof the newly created files.

> Check it with getfacl *and* icacls to get
> an idea what it looks like, and compare the result with the POSIX
> ACL rules, as outlined on, e.g., http://linux.die.net/man/5/acl.


Corinna

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

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