Re: question about semanage fcontext and awareness of file_contexts.local file

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On 08/17/2015 07:42 PM, Bond Masuda wrote:
> We want to add some custom file contexts for certain directories, in
> particular we have /audit as a separate partition and run this:
> 
> chroot /mnt/root semanage fcontext -a -t auditd_log_t "/audit(/.*)?"
> 
> To make sure auditd works. This is run with chroot because the system
> we're modifying is not running and mounted at /mnt/root. This creates
> the file_contexts.local file with this content:
> 
> # This file is auto-generated by libsemanage
> # Do not edit directly.
> 
> /audit(/.*)?    system_u:object_r:auditd_log_t:s0
> 
> Later on, when we boot that system that was in /mnt/root, the
> file_contexts.local remains the same. However, if I run semanage to add
> another record, for example (this time, not in chroot):
> 
> semanage fcontext -a -t httpd_sys_content_t "/data/www(/.*)?"
> 
> It creates the content for httpd_sys_content_t in file_contexts.local,
> but overwrites the previous entry for auditd_log_t.
> 
> If I add the auditd_log_t entry once again, _both_ entries are now
> present in file_contexts.local. So, it seems that the 1st time I run
> semanage fcontext -a _while_ the system is running, it is not aware of
> the content that was added when I ran semanage fcontext -a when the
> system was offline and mounted in /mnt/root.
> 
> Does semanage maintain state somewhere other than in the
> file_contexts.local file? How can I make sure it is aware of the content
> in file_contexts.local that was created by semanage when it was run in
> chroot?

This sounds like a bug to me.  What version of libsemanage and
policycoreutils are you using, as this may be version-specific?


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