On itself prettyu easy: onstat -g glo will print vp info like process id of the oninit processes.
What do you mean with archive log mode, do you mean you want to see if logical log backup is set up? In this case a onstat -c|grep LTAPEDEV will do. If it reads /dev/null (UNIX) or NUL (windows) then the answer is no, othwerwise yes.
Lots of fun,
Rob Prop