GNU bug report logs - #12020
ls should show when extended system attributes are set

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Message #13 received at 12020 <at> debbugs.gnu.org (full text, mbox):

From: Luk Claes <luk <at> debian.org>
To: Eric Blake <eblake <at> redhat.com>
Cc: 12020 <at> debbugs.gnu.org
Subject: Re: bug#12020: ls should show when extended system attributes are set
Date: Sun, 22 Jul 2012 00:50:12 +0200

On 07/21/2012 11:56 PM, Eric Blake wrote:
> tag 12020 moreinfo
> thanks
> 
> On 07/21/2012 12:41 PM, Luk Claes wrote:
>> Hi
>>
>> Currently when using POSIX acls, this is not visible when listing files
>> with ls. This means that users and system administrators cannot easily
>> see when (non trivial) POSIX acls are in use which obviously can result
>> in wrong expectations when only seeing the rwx kind of acls.
> 
> What version of coreutils are you using, and on what distro?

I'm using Debian, version 8.13

>> At a minimum I would like that ls would show that extended system
>> attributes are being used (maybe by showing something different than -
>> for the type of file?).
> 
> But ls _does_ already do that.

> Notice how the 11th character changed from '+' (ACL present) to '.'
> (SELinux label present)?  That is, a trailing '+' is already what
> coreutils uses to indicate the presence of ACLs (which generally provide
> additional rights); and a trailing '.' indicates the presence of
> restrictions (SELinux labels typically restrict rights depending on the
> labeling of the calling context).  On systems with neither ACLs nor
> SELinux labels, then the 11th character is ' ' (space) to indicate no
> other special permissions.

Nice, though in that case it does apparently not vanish when I only
remove the non-trivial acl again and keep the mask:

$ getfacl foo
# file: foo
# owner: luk
# group: luk
user::rw-
user:mongodb:rw-
group::r--
mask::rw-
other::r--

$ ls -l foo
-rw-rw-r--+ 1 luk luk 5 Jul 22 00:37 foo

$ setfacl -x u:mongodb foo

$ ls -l foo
-rw-r--r--+ 1 luk luk 5 Jul 22 00:37 foo

$ getfacl foo
# file: foo
# owner: luk
# group: luk
user::rw-
group::r--
mask::r--
other::r--

Though I guess it's close enough, only a pitty it's not in the manpage.
So feel free to close this or retarget it.

Cheers

Luk

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