Re: [9fans] webls.c - synthesize directories on the fly.

[Eric Grosse <ehg@lucent.com>]

> A few years ago I wrote a filterfs to exclude files matching a
> regular expression.  We use it on our web site when publishing
> part of the dump file system since, as people have noted in
> the past, there can be times when you need to effectively
> delete things from Venti.
> It's not polished so we never put it on sources, but I'm
> willing to do so if there is sufficient interest.

By popular demand, filterfs is now on sources.  Pick up the new
/sys/src/cmd/exportfs and read the man page for the -p option.

We're not entirely happy with the syntax nor with the lack of
assistance in writing patterns, but it's been useful as is.
File access permissions will be added later as an optional
third field on the patternfile lines.

Eric
Dave