File postgresql-script of Package postgresql

#!/bin/sh

PG_SYSCONFIG=/etc/sysconfig/postgresql
test -f $PG_SYSCONFIG && . $PG_SYSCONFIG

eval DATADIR=${POSTGRES_DATADIR:-~postgres/data}
OPTIONS=${POSTGRES_OPTIONS}
PIDFILE=$DATADIR/postmaster.pid

# 
if test -r $DATADIR/PG_VERSION ; then
    DATA_VERSION=$(cat $DATADIR/PG_VERSION)
    POSTGRES=/usr/lib/postgresql${DATA_VERSION/./}/bin/postgres
fi
if test -x /usr/bin/postgres; then
    ACTIVE=$(readlink -q -f /usr/bin/postgres)
    test -z "$POSTGRES" && POSTGRES="$ACTIVE"
fi
if test -n "$DATA_VERSION"; then
    if test -z "$ACTIVE" -o "$ACTIVE" != "$POSTGRES"; then
	echo " Your database files were created by PostgreSQL version $DATA_VERSION."
	if test -x "$POSTGRES"; then
	    echo " Using the executables in $(dirname $POSTGRES)."
	else
	    echo " Could not find executables for this version."
	    echo " Please install the PostgreSQL server package for version $DATA_VERSION."
	fi
    fi
elif test -z "$ACTIVE"; then
    echo " Cannot find an active PostgreSQL server binary. Please install one of the PostgreSQL"
    echo " server packages or activate an already installed version using update-alternatives."
fi
if test ! -x "$POSTGRES"; then
    exit 1
fi
BINDIR=$(dirname $POSTGRES)
# Avoiding the use of awk to get the last word
# in the line, which is the version number
VERSION=$($POSTGRES --version)
VERSION=${VERSION##* }
pg_ctl () {
	$BINDIR/pg_ctl -s -D $DATADIR ${POSTGRES_TIMEOUT:+-t $POSTGRES_TIMEOUT} "$@"
}

cd ~
case "$1" in
    start)
	if [ ! -f $DATADIR/PG_VERSION ]; then
	    test -n "$POSTGRES_LANG" && export LC_ALL="$POSTGRES_LANG"
	    install -d -m 700 ${DATADIR} &&
	    echo "Initializing PostgreSQL $VERSION at location ${DATADIR}"
	    /usr/bin/initdb --auth=ident $DATADIR &> initlog || {
		echo "Initialisation failed. See $PWD/initlog ."
		exit 1
	    }
	fi
	pg_ctl start -w ${OPTIONS:+-o "$OPTIONS"}
	;;

    stop)
	pg_ctl stop -m fast
	;;
    
    reload)
	pg_ctl reload
	;;
    
    *)
        echo "Usage: $0 {start|stop|reload}"
	exit 1
	;;
esac