Getting desktop background on Mac

Question

How do I get the current wallpaper on a Mac? Just point me to an API function so I can Google more.

Edit: I think I found it. [NSUserDefaults standardUserDefaults] menti

Answer 1

You can do it in shell + Applescript like this:

#!/bin/bash
osascript -e 'tell app "finder" to get posix path of (get desktop picture as alias)'