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Date: Tue, 17 Jul 2007 17:33:12 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: acl_trivial?
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On Jul 17 07:36, Eric Blake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Coreutils would like to use acl_trivial(3) in ls(1), in order to more
> easily decide whether to print a trailing + in the mode section.
> 
> http://docs.sun.com/app/docs/doc/819-2246/6n4i34qck?a=view

Huh?  The description is a bit wrong, isn't it?  Quote:

"A POSIX draft ACL is trivial if it has greater than MIN_ACL_ENTRIES. An
 NFSv4/ZFS-style ACL is trivial if it either has entries other than
 owner@, group@, and everyone@, has inheritance flags set, or is not
 ordered in a manner that meets POSIX access control requirements."

Looks like they missed to add a "not" twice...

> directories - currently, coreutils thinks that ALL directories have
> non-trivial ACLs, thanks to the 3 default:*:* entries making it so that
> there are more than MIN_ACL_ENTRIES associated with each directory; but in
> reality, it seems like this situation should qualify as trivial:
> 
> $ getfacl .
> # file: .
> # owner: eblake
> # group: None
> user::rwx
> group::r-x
> mask:rwx
> other:r-x
> default:user::rwx
> default:group::---
> default:other:---
> $ ls -ld .
> drwxr-xr-x+ 14 eblake None 0 Jul 14 22:27 .

There's a "... has inheritance flags set" in the above quoted paragraph.
And why is the above a trivial ACL but not

  $ getfacl .
  # file: .
  # owner: eblake
  # group: None
  user::rwx
  group::r-x
  mask:rwx
  other:r-x
  default:user::rwx
  default:group::r-x
  default:other:r-x

?  And what if the default entries are missing, is the directory then
suddenly non-trivial?  In other words, how do you decide over triviality
in case of Windows ACLs?  What's the exact rule you're thinking of?

OTOH, we didn't have complaints about the '+' for some time now so
people got used to it, apparently.  What's the actual gain of adding
this function?


Corinna

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

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