pstat functionality?

[Rayan Zachariassen]

I'm looking for a command that prints kernel data associated with a process,
in particular I'm trying to find out about the file descriptors of a process
and what they're attached to (with pstat I'd cross-reference the u-area
information with the file and inode tables).  I recall some program with
a command-line interface to this sort of thing but can't remember its name,
and half an hour of looking through man page synopses didn't jog my memory.
Any suggestions?

Thanks,

rayan