#!/bin/sh

flag=''
if [ "x$1" = "x-a" ]
then
	flag=-a
	shift
fi

case $# in
0)
	user=$USER
	;;
1)
	user=$1
	;;
*)
	echo 'usage: psu [-a] [user]' 1>&2
	exit 1
esac

ps $flag | grep "^$user "