如何在Mac OSX上监视进程/应用程序或文件锁定？

Question

I'm porting a file encryption app from Windows to Mac OSX. One of its features, is that it lets you open an encrypted file in its source application (say TextEdit), make some changes and then re-rencrypt the file.

To accomplish this on OSX, I would like to either monitor the start/stop of the process that is launched when I ask the system to open my decrypted document, or monitor the file itself for any acquired and released locks.

Is there a way to programatically accomplish this, either through existing OSX or Unix APIs? I've already tried the .NET provided APIs (FileSystemWatcher, Process) without luck.

Answer 1

What I wound up doing, was to listen to Notifications from NSNotificationCenter and NSApplication after I had asked the OS to open my file in its default Application. The particular events were:

• NSWorkspace.Notifications.ObserveDidLaunchApplication(EventHandler)
• NSWorkspace.Notifications.ObserveDidTerminateApplication(EventHandler)

If you're stuck with the same issue, please see my implementation here .