[launchd-dev] Help in launching a launch daemon

[Damien Sorresso]

On Feb 5, 2010, at 1:23 PM, Arun wrote:
> Hi All,
> 
> I am a newbie to launchd.
> 
> I have a requirement to launch a system daemon whenever a file is created / modified.
> Also this daemon should not be launched multiple times, means even if the daemon crashes it should not be launched.
> Also this daemon shloud not be launched when the system starts. 
> 
> Can anyone help me in writing the launchd plist file satisfying the above.

$ man launchd.plist

See the WatchPaths and LaunchOnlyOnce keys, specifically.
-- 
Damien Sorresso
BSD Engineering
Apple Inc.