#!/bin/bash

[ $# -lt 1 ] && exit 6

PSQL=`which psql`

USE_SU=${1}
HOST=${2}
USER=${3}

PG_OPTS1=
PG_OPTS2=
[ -n "${USER}" ] && PG_OPTS1="-U ${USER}"
[ -n "${HOST}" ] && PG_OPTS2="-h ${HOST}"

if [ "${USE_SU}" == "no" ]; then
    $PSQL -l ${PG_OPTS1} ${PG_OPTS2} -t -x | grep Name | awk '{ print $3 }' | grep -v template
    ret=$?
    else
    su postgres -c "$PSQL -l ${PG_OPTS1} ${PG_OPTS2} -t -x | grep Name | awk '{ print \$3 }' | grep -v template"
    ret=$?
    fi

exit ${ret}