I'm trying to identify when a particular process is running, based on its arguments, on Mac OS X. There may be several processes running with the same name, but only one will have the arguments I'm looking for. The processes are not owned by the same user who will be running my code. They will not have modified their argv in any way.

The 'ps' command shows exactly the information that I need. But I would greatly prefer not to have to spawn 'ps' and parse its output.

I originally tried the solution from this question, using sysctl, but it turns out that only works for processes you own; see my other question for more info.

So how does ps obtain argv information for processes owned by other users?