(unknown charset) Fwd: kern/122838: [devfs] devfs doesn't handle complex paths (like zvol/pool/vms) good

Would like to ask for opinions on this topic...
Please read this PR for context:
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/122838
Especially Jaakko's insightful description of the problem.


-------- Original Message --------
Message-ID: <5150B598.7050700_at_FreeBSD.org>
Date: Mon, 25 Mar 2013 22:37:44 +0200
From: Andriy Gapon <avg_at_FreeBSD.org>
Subject: Re: kern/122838: [devfs] devfs doesn&#39;t handle complex paths (like
zvol/pool/vms) good


Can't believe that we are still where we were more than two years ago...

I think that we have to make this change even if it _might_ break some existing
rulesets.

Rationale:
- current behavior is contrary to any documentation
- current behavior is contrary to common sense
- current behavior is very hard to describe and account for
- I presume that very few people actually fully understand the current behavior
- I presume that even fewer people made a conscious choice to depend or make use
of its non-trivial features of the current behavior

So, we should make the behavior of devfs pattern consistent with the
documentation and the common sense.

In addition to Jaakko's patch I propose that we pass FNM_PATHNAME to fnmatch(9),
so that the matching is indeed consistent with glob(3) / shell glob-ing rules
for filesystem paths.

-- 
Andriy Gapon