Re: semanage help

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Stephen Smalley wrote:
> On Thu, 2008-10-23 at 12:05 -0400, Daniel J Walsh wrote:
>> Stephen Smalley wrote:
>>> On Wed, 2008-10-22 at 21:06 -0500, LC Bruzenak wrote:
>>>> - get the file context -
>>>> [root@v1 ~]# semanage fcontext -l | grep prelude_spool
>>>> /var/spool/prelude(/.*)?                           all files          system_u:object_r:prelude_spool_t:s0 
>>>> /var/spool/prelude-manager(/.*)?                   all files          system_u:object_r:prelude_spool_t:s0 
>>>>
>>>> So it seems that it knows about this path match.
>>>>
>>>> - set the file range -
>>>> [root@v1 ~]# semanage fcontext -m -r s15:c0.c1023  "/var/spool/prelude(/.*)?"
>>>> /usr/sbin/semanage: File context for /var/spool/prelude(/.*)? is not defined
>>>>
>>>> [root@v1 ~]# semanage fcontext -m -r s15:c0.c1023 -t prelude_spool_t '/var/spool/prelude(/.*)?'
>>>> /usr/sbin/semanage: File context for /var/spool/prelude(/.*)? is not defined
>>>>
>>>> Can someone tell me what I'm doing wrong/how to fix?
>>> Looks like it is defined by a policy module, and semanage fcontext -m
>>> can only modify local definitions.
>>>
>>> I'd think that you could add a local definition to override it, ala:
>>> /usr/sbin/semanage fcontext -a -t prelude_spool_t -r s15:c0.c1023 '/var/spool/prelude(/.*)?'
>>>
>>> but that complains that it already exists.  Maybe it ought to be using
>>> semanage_fcontext_exists_local() instead?
>>>
>> Making that change ends up with and using postgrey instead of prelude.
>>
>>
>> # /usr/sbin/semanage fcontext -a -t postgrey_spool_t -r s0:c0.c1023
>> '/var/spool/postfix/postgrey(/.*)?'
> 
> Not sure I understand - the command I ran above was for prelude_spool_t
> and /var/spool/prelude, not postgrey.  Anyway, I thought we moved the
> nodups_specs() check before reading of file_contexts.local so that local
> specs could in fact override/duplicate base file_contexts.  In
> libselinux 2.0.71.
>> /sbin/restorecon -r -v /var/spool/posfix/postgrey
>> /etc/selinux/targeted/contexts/files/file_contexts: Multiple different
>> specifications for /var/spool/postfix/postgrey(/.*)?
>> (system_u:object_r:postgrey_spool_t:s0:c0.c1023 and
>> system_u:object_r:postgrey_spool_t:s0).
>>
>>
Did testing on Fedora 9 which did not have prelude installed, so I
changed, it for the test

# rpm -q libselinux
libselinux-2.0.67-4.fc9.x86_64
libselinux-2.0.67-4.fc9.i386

On Rawhide it seems to work

# /usr/sbin/semanage fcontext -a -t prelude_spool_t -r s0:c0.c1023
'/var/spool/prelude(/.*)?'
# restorecon -R -v /var/spool/prelude/
restorecon reset /var/spool/prelude context
system_u:object_r:prelude_spool_t:s0->system_u:object_r:prelude_spool_t:s0:c0.c1023


So I will patch policycoreutils.


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