#!/usr/bin/python

import sys,portage

if (len(sys.argv) < 2):
	print "version: one argument required"
	sys.exit(1)

mytree = portage.db[portage.root]["vartree"]
mymatch = mytree.dep_match(sys.argv[1])
if (mymatch and len(mymatch)>0):
	sys.exit(0)
else:
	sys.exit(1)