prelink, cron-job and SELinux compliance

[Stefan Schulze Frielinghaus <stefan@seekline.net>]

In RHEL/CentOS 5.1 a cron job (/etc/cron.daily/prelink) runs prelink.
The cron job itself removes a file (/etc/prelink.cache) if necessary and
updates the database. This does not work with the strict SELinux policy.

To solve this I patched the prelink application to
use /var/cache/prelink/prelink.cache instead of /etc/prelink.cache
This would make it more easier to write SELinux policies. But know my
actual question is how to modify the cron job to work properly? All cron
jobs on my system are labeled as bin_t. This would mean that
system_crond_t needs write/create etc. permissions
on /var/cache/prelink. Thats not really nice and I would prefer to
create a domain like cron_script_prelink_t for /etc/cron.daily/prelink
which gets all the rights to manage /var/cache/prelink.

What are your ideas to handle cron scripts properly?


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