prenice(1) problem? Or pilot error?

[Paul Goyette <paul%whooppee.com@localhost>]

I verified that I have several processes in a given process group:

	# pgrep -g 20012
	12091
	15527
	19923
	20500
	6691
	16959
	14794
	18504
	20012
	#

But when I try to prenice(1) those processes, I get no results:

	# prenice -l 20 -g 20012
	#

Shouldn't I expect prenice(1) to show me which processes are being 
affected?  And shouldn't that list match the list from pgrep(1) (modulo 
any processes which may have been newly created or exited)?



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