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Date:	Thu, 01 Aug 2013 17:21:42 +0400
From:	Vyacheslav Dubeyko <slava@...eyko.com>
To:	Felipe Monteiro de Carvalho <felipemonteiro.carvalho@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: File permissions in ext4

On Thu, 2013-08-01 at 15:09 +0200, Felipe Monteiro de Carvalho wrote:
> On Thu, Aug 1, 2013 at 2:59 PM, Vyacheslav Dubeyko <slava@...eyko.com> wrote:
> > Do you build the kernel with POSIX ACLs support
> > (CONFIG_EXT4_FS_POSIX_ACL)?
> 
> Anyway to find out this? I am using the pre-compiled kernel which
> comes with Mageia Linux ... so I did not compile the kernel myself.
> 

You can check it in your kernel configuration file. Ubuntu stores such
files in /boot/config-<kernel-version>.

Anyway, I think that this quotation from fs/ext4/Kconfig can be helpful
for you:

config EXT4_FS_POSIX_ACL
	bool "Ext4 POSIX Access Control Lists"
	depends on EXT4_FS
	select FS_POSIX_ACL
	help
	  POSIX Access Control Lists (ACLs) support permissions for users and
	  groups beyond the owner/group/world scheme.

	  To learn more about Access Control Lists, visit the POSIX ACLs for
	  Linux website <http://acl.bestbits.at/>.

	  If you don't know what Access Control Lists are, say N

With the best regards,
Vyacheslav Dubeyko.


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