September 2014
Intermediate to advanced
240 pages
5h 53m
English
Content preview from SELinux CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Enhancing an SELinux policy with file transitions
Up until now, we've only handled the configuration part on file contexts: if we would ask SELinux utilities to relabel files, then the changes we made would come into effect. However, unless you run with the restorecond daemon checking out all possible file modifications (which would really be a resource hog) or run restorecon manually against all files regularly, the newly defined contexts will not be applied to the files.
What we need to do is modify the local SELinux policy so that, upon creation of these files, the Linux kernel automatically assigns the right label to those files. This is handled through file transitions, which is a specific case of a type transition.
In a type transition, we ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.