cocoa - How to Safely Force Shutdown of Mac

Question

What I want

I'm developing a little app to force me to only work at certain times of day - I need something to force me to stop working in the evenings so I can be more effective in the day.

The option within OS X to shut down my machine at a certain time is too easy to cancel. And you can always log back in afterwards.

I want my app to quit all applications whether they have unsaved work or not.

What I've tried

I thought of killing the loginwindow process, but I've read that this can cause data corruption.

I've come across the shutdown command - I'm using sudo shutdown -h +0 to shutdown immediately. This appears to be just the ticket, but I'm worried that it might cause data corruption if, say, Disk Utility is doing some kind of scan.

Is the shutdown command safe?

Can the shutdown command cause corruption? Or is it safe to use? Is there a better way of forcing shutdown safely?

Answer 1

Use AppleScript to tell application "System Events" to shut down.