Hai all,
I am developing an application in Cocoa. I want to constantly check whether the contents of a file in a particular location is changed or not (like FileSystemWatcher in .NET). Please anyone give me a solution
+1
A:
As Diederik says, FSEvents is Apple's Carbon API for listening to file system events. Someone has created a Cocoa/Objective-C wrapper for FSEvents called SCEvents that is a little easier to use.
Bryan Traywick
2009-06-30 13:56:25
+1
A:
FSEvents are great, but they're used to monitor folders. To monitor a single file you'll want to check out kqueues. Try "man kqueue" in the terminal.
Jon Hess
2009-06-30 16:09:58
SCEvents is the better option for someone looking for a Cocoa solution, though.
Quinn Taylor
2009-06-30 16:29:57
FSEvents are still for directory changes though, and it sounds like SCEvents is a wrapper for FSEvents. The question asks to monitor a single file. Kqueues are much better suited for that. The link to SCEvents above also references UKKQueue, which might be a good wrapper too.
Jon Hess
2009-08-07 21:52:49
+1
A:
Another option would be to drink directly from the /dev/fsevents firehose. I work on an application that does exactly this and it works very well. You can be notified if a file changes, is deleted, is moved, has attributes changed, etc. Granted, this isn't a "Cocoa" option since it's mostly C code, but we're using this in a Cocoa app.
Dave DeLong
2009-06-30 16:37:59
A:
A further resource on kqueues is http://developer.apple.com/documentation/Darwin/Conceptual/FSEvents_ProgGuide/KernelQueues/KernelQueues.html
Jon Steinmetz
2009-07-09 03:35:40