Red Hat jboss停止脚本错误

系统环境 Red Hat Enterprise Linux Server release 5.3
jboss停止时候调用下面方法
stop_broker()
{
pid_list=`ps -o user=$USER_NAME -o pid -o ppid -o args -eaf | grep $USER_NAME | grep "$1" | grep -v grep | /usr/bin/awk '{print $2}'`

for i in $pid_list
do
/bin/echo "Parent process id: $i"
kill_child -9 $i "$1"
/bin/echo "done."
/bin/echo "jBoss Server stopped!" >> $LOG_FILE-`date '+%y-%m-%d'`.log
done

}
执行到第一行的时候提示Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ