how to query goal in OS shell ?

czsq888 <[email protected]> Sun, 23 Jun 2013 14:44:06 +0800 (CST)

Newsgroups	gmane.comp.gnu.prolog.general
Message-ID	<[email protected]>

Using swi-prolog, i can use `swipl -q -f foo.pl -g "bar(1,2)." -t halt` to
 query goal from OS shell. How to do the same thing using gnuprolog ?
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