trigger external program on some change

[Emmanuel Dreyfus <manu@netbsd.org>]

Hello

I'd need to trigger execution of an external shell script when some 
particular change occur in the tree. Is there a simple way of doing that? 

Of course, an overlay could do that. I saw no available overlay that
would have this capacity out of the box. The only way I see is building
a new overlay just for that, or use something such as slapo-auditlog 
and feed it to an external filter (throug a pipe?). I wonder if there is a
simplier mechanism available.

-- 
Emmanuel Dreyfus
manu@netbsd.org