#! /bin/sh
# Copyright (c) 1998 S.u.S.E. GmbH Fuerth, Germany.
#
# Author: 
#         Karl Eichwalder <ke@suse.de>, 1998
#         Reinhard Max <max@suse.de>, 2000
#
# /etc/init.d/postgres
#
#   and symbolic its link
#
# /usr/sbin/rcpostgres
#
### BEGIN INIT INFO
# Provides:       postgresql
# Required-Start: $network $remote_fs
# Required-Stop:
# Default-Start:  3 5
# Default-Stop:   
# Description:    Start the PostgreSQL master daemon
### END INIT INFO

# Source SuSE config
PG_SYSCONFIG=/etc/sysconfig/postgresql
test -f $PG_SYSCONFIG && . $PG_SYSCONFIG

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_failed        set local and overall rc status to failed
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
. /etc/rc.status

LOGFILE=/var/log/postgresql
eval DATADIR=${POSTGRES_DATADIR:-~postgres/data}
OPTIONS=${POSTGRES_OPTIONS}
H=/usr/bin/postmaster
test -x $H || exit 5

if [ -r $DATADIR/PG_VERSION ] ; then
    BIN_VERSION=$($H --version|sed 's/.* \([0-9]\+\.[0-9]\+\).*/\1/')
    DATA_VERSION=$(cat $DATADIR/PG_VERSION)
	if [ "$BIN_VERSION" != "$DATA_VERSION" ]; then
	for libdir in /usr/lib64 /usr/lib; do
	    H=$libdir/pgsql/backup/$DATA_VERSION/postmaster
	    test -x $H && break
	done
	test -x $H || exit 5
	echo " Your databases are still using the format of PostgreSQL $DATA_VERSION."
	echo " Therefore a backup of the old PostgreSQL server program will be used"
	echo " until you have saved and removed your old database files"
	echo " See also /usr/share/doc/packages/postgresql/README.SuSE ."
    fi
fi

# The echo return value for success (defined in /etc/rc.config).
rc_reset

# Return values acc. to LSB for all commands but status:
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signalling is not supported) are
# considered a success.

pg_ctl () {
	CMD="/usr/bin/pg_ctl $@ --lsb"
	su - postgres -c "$CMD"
}

case "$1" in
    start)
	touch $LOGFILE
	chown postgres:postgres $LOGFILE
	chmod 0600 $LOGFILE
	if [ ! -f $DATADIR/PG_VERSION ]; then
	    echo -n "Initializing the PostgreSQL database at location ${DATADIR}"
	    LANG_SYSCONFIG=/etc/sysconfig/language
	    test -f "$LANG_SYSCONFIG" && . $LANG_SYSCONFIG
	    LANG=${POSTGRES_LANG:-$RC_LANG}
	    install -d -o postgres -g daemon -m 700 ${DATADIR} &&
	    su - postgres -c "env -i LANG=$LANG initdb $DATADIR &> initlog" || rc_failed
	    rc_status -v
	    rc_status || {
		echo "You can find a log of the initialisation in ~postgres/initlog."
		rc_exit
	   } 
	fi
	echo -n "Starting PostgreSQL"
        ## remove old socket, if it exists and no daemon is running.
	checkproc $H || {
		rm -f /tmp/.s.PGSQL.5432
		rm -f /var/lib/pgsql/data/postmaster.pid
	}

	## Start daemon with startproc(8). If this fails
	## the echo return value is set appropriate.
	#/sbin/startproc -e -t 1 -u postgres -l $LOGFILE $H $OPTIONS -D$DATADIR
	pg_ctl start -s -w -p $H -l $LOGFILE -D $DATADIR -o "\"$OPTIONS\""
	rc_status -v
    ;;

    stop)
	echo -n "Shutting down PostgreSQL"
	## Stop daemon with killproc(8) and if this fails
	## set the echo return value.

	pg_ctl stop -s -D $DATADIR -m fast
	rc_status -v
    ;;

    try-restart)
        ## Stop the service and if this succeeds (i.e. the 
        ## service was running before), start it again.
        ## Note: try-restart is not (yet) part of LSB (as of 0.7.5)
	$0 status &&  $0 restart
    ;;

    restart)
        ## Stop the service and regardless of whether it was
        ## running or not, start it again.
        $0 stop
        $0 start
	rc_status
    ;;

    force-reload | reload)
	echo -n "Reloading configuration for PostgreSQL"
	killproc -HUP $H
        rc_status -v
    ;;

    status)
	echo -n "Checking for PostgreSQL: "
        ## Check status with checkproc(8), if process is running
        ## checkproc will return with exit status 0.

        # Status has a slightly different for the status command:
        # 0 - service running
        # 1 - service dead, but /var/run/  pid  file exists
        # 2 - service dead, but /var/lock/ lock file exists
        # 3 - service not running

        # NOTE: checkproc returns LSB compliant status values.
        checkproc $H
        rc_status -v
    ;;
    
    probe)
        rc_failed 3
        rc_status -v
    ;;

    *)
        echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
        exit 1
    ;;
esac

# Inform the caller not only verbosely and set an exit status.
rc_exit
