[Haskell-cafe] inotify-alike for mac os x?

Ross Mellgren rmm-haskell at z.odi.ac
Fri Dec 4 11:31:48 EST 2009

kqueue is the "low level" interface, but requires that you handle all  
file system events as they happen, and fast. There is a higher level  
interface called fsevents (with accompanying daemon fseventsd) which  
allows you a more calm way to read the file system events.


I think launchd just happens to have an integration to kqueue or  
fseventsd, I'm not sure launching a program every time a file changes  
would be the best thing :-)


On Dec 4, 2009, at 11:08 AM, David Leimbach wrote:

> d
> On Thu, Dec 3, 2009 at 7:55 PM, Gregory Collins <greg at gregorycollins.net 
> > wrote:
> Conal Elliott <conal at conal.net> writes:
> > I'd like to make some FRPish toys that keep files updated to have
> > functional relationships with other files.  hinotify looks like just
> > the sort of underlying magic I could use for efficient  
> implementation
> > on linux.  Is there any support for mac os x?  Could support be  
> either
> > added to hinotify or maybe inotify and a mac-friendly library be
> > abstracted into a common Haskell interface?  I'm fine with an
> > imperative interface, since I can abstract into a functional  
> library,
> > which I guess would be a sort of persistent simplified FRP.
> On Mac & BSD you have to use kqueue, and on Windows it's
> ReadDirectoryChangesW. A platform-agnostic Haskell library for  
> detecting
> filesystem change notifications is something that I would really
> appreciate!
> launchd does everything on mac os x, like literally everything.  My  
> mother said if I can't say something good about someone or something  
> then don't say anything at all, and in this case, I'm taking her  
> advice on what I think about launchd, however if you click the link  
> below you might get an idea of how that works on Mac OS X.
> http://stackoverflow.com/questions/1515730/is-there-a-command-like-watch-or-inotifywait-on-the-mac
> Dave
> G
> --
> Gregory Collins <greg at gregorycollins.net>
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