oprhan/zombie processes

[tony.chamberlain at lemko.com]

Someone requested a list of orphaned and zombie processes. I know that orphan processes have
PPID of 1 so I can 

 ps -aeo user,pid,ppid,stime,time,state,command | awk '($3=="1" ||$6=="Z")'

But this will also print all system processes because they also have PPID of 1.
How can I find just the orphan processes
(without | grep -v mgetty | grep -v init | grep -v this | grep -v that | grep -v something_else | grep -v blahblahblah)?

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