<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">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.<div><br></div><div><a href="http://developer.apple.com/mac/library/documentation/Darwin/Conceptual/FSEvents_ProgGuide/Introduction/Introduction.html">http://developer.apple.com/mac/library/documentation/Darwin/Conceptual/FSEvents_ProgGuide/Introduction/Introduction.html</a></div><div><br></div><div>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 :-)</div><div><br></div><div>-Ross</div><div><br><div><br><div><div>On Dec 4, 2009, at 11:08 AM, David Leimbach wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">d<br><br><div class="gmail_quote">On Thu, Dec 3, 2009 at 7:55 PM, Gregory Collins <span dir="ltr"><<a href="mailto:greg@gregorycollins.net">greg@gregorycollins.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5">Conal Elliott <<a href="mailto:conal@conal.net">conal@conal.net</a>> writes:<br>
<br>
> I'd like to make some FRPish toys that keep files updated to have<br>
> functional relationships with other files. hinotify looks like just<br>
> the sort of underlying magic I could use for efficient implementation<br>
> on linux. Is there any support for mac os x? Could support be either<br>
> added to hinotify or maybe inotify and a mac-friendly library be<br>
> abstracted into a common Haskell interface? I'm fine with an<br>
> imperative interface, since I can abstract into a functional library,<br>
> which I guess would be a sort of persistent simplified FRP.<br>
<br>
</div></div>On Mac & BSD you have to use kqueue, and on Windows it's<br>
ReadDirectoryChangesW. A platform-agnostic Haskell library for detecting<br>
filesystem change notifications is something that I would really<br>
appreciate!<br></blockquote><div><br></div><div>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.</div>
<div><font class="Apple-style-span" face="arial, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New'"><br></font></div><div><span class="Apple-style-span" style="font-family: arial, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New'; "><a href="http://stackoverflow.com/questions/1515730/is-there-a-command-like-watch-or-inotifywait-on-the-mac">http://stackoverflow.com/questions/1515730/is-there-a-command-like-watch-or-inotifywait-on-the-mac</a></span></div>
<div><font class="Apple-style-span" face="arial, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New'"><br></font></div><div><span class="Apple-style-span" style="font-family: arial, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New'; ">Dave </span></div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
G<br>
<font color="#888888">--<br>
Gregory Collins <<a href="mailto:greg@gregorycollins.net">greg@gregorycollins.net</a>><br>
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