On a lighter note, I'd thought I post an "MDB puzzle" for the truly masochistic out there. I was going to post two, but the second one was just way too hard, and I was having a hard time finding a good test case in userland. You can check out how we hope to make this better over at the MDB community. Unfortunately I don't have anything cool to give away, other than my blessing as a truly elite MDB hacker. Of course, if you get this one right I might just have to post the second one I had in mind...

The rules are simple. You can only use a single line command in 'mdb -k'. You cannot use shell escapes (!). Your answer must be precise, without requiring post-processing through some other utility. Leaders of the MDB community and their relatives are ineligible, though other Sun employees are welcome to try. And now, the puzzle:

Print out the current working directory of every process with an effective user id of 0.

Should be simple, right? Well, make sure you go home and study your MDB pipelines, because you'll need some clever tricks to get this one just right...

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