Current Run-Level: How can you tell?

[Steve Ralston]

Sorry as I'm sure this is a FAQ or RTFM question, but, I've looked quite
a few places and can't find a way to tell what the current run level of
a Unix system is (i.e. "init" level).

I am most interested in a solution that is portable, can be performed inside
a C program, or ANY OTHER method you can come up with; in about that order
of precedence.

As always, thanks in advance!
-- 
Steve Ralston    (sralston at srwic.UUCP || ..!uunet!ncrlnk!ncrwic!srwic!sralston)
235 N Zelta, Wichita, KS 67206