pwdx is supposed to print out the current working directory of a process given a process id.
Normally this looks something like:
$ sudo pwdx 1 1: / $ pwdx $$ 5251: /home/foo
One one machine I have it always returns the same gibberish string
$ pwdx 1 1: H?l$?L?|$?H?- $ pwdx 24535 24535: H?l$?L?|$?H?- $ pwdx $$ 24351: H?l$?L?|$?H?-