get number of open files in a process?

[Batutis, Ed]

> # df -ki /dev/fd/
> Filesystem 1024-blocks Used Avail Capacity iused  ifree %iused  Mounted on
> fdescfs              1    1     0   100%       4 116439    0%   /dev/fd
>                                            ^^^^^ ^^^^^^

Interesting. But I need this information for a process.

Thanks,

=Ed