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#!/sbin/runscript
# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-db/postgresql-server/files/postgresql.init-8.3,v 1.4 2008/09/28 22:53:02 caleb Exp $

extra_started_commands="reload"
extra_stopped_commands="setup"

depend() {
	use net
	after firewall
	provide postgresql
}

checkconfig() {
	if [ ! -d "$PGDATA" ] ; then
		eerror "Directory not found: $PGDATA"
		eerror "Please make sure that PGDATA points to the right path."
		eerror "You can run '/etc/init.d/pgcluster setup' to setup a new database cluster."
		return 1
	fi
}

start() {
	checkconfig || return 1

	#ebegin "Starting PostgreSQL"

	if [ -f "$PGDATA/postmaster.pid" ] ; then
		rm -f "$PGDATA/postmaster.pid"
	fi

	local retval

	if [ ${PG_START_DB} == "yes" ]; then 
		ebegin "Starting PGCluster database instance"
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl start ${WAIT_FOR_START} -o '--silent-mode=true ${PGOPTS}'" >/dev/null
		retval=$?
		if [ $retval -ne 0 ]; then
			eend $retval 
		else

			# The following is to catch the case of an already running server
			# in which pg_ctl doesn't know to which server it connected to and false reports the server as 'up'
			sleep 2
			if [ ! -f "$PGDATA/postmaster.pid" ] ; then
				eerror "The pid-file doesn't exist but pg_ctl reported a running server."
				eerror "Please check whether there is another server running on the same port or read the log-file."
				eend 1 
			else
				local pid=$(grep "^[0-9]\+" "$PGDATA/postmaster.pid")
				test -d /proc/"${pid}" 
				eend $?
			fi
		fi
	fi

	if [ ${PG_START_REPLICATE} == "yes" ]; then
		ebegin "Starting PGCluster replicate instance"
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pgreplicate -D ${PGDATA} -l" >/dev/null
		retval=$?
		sleep 1
		if [ ! -f "$PGDATA/pgreplicate.pid" ] ; then
			eerror "Where's the pid file?"
			eend 1 
		else
			local pid=$(grep "^[0-9]\+" "$PGDATA/pgreplicate.pid")
			test -d /proc/"${pid}" 
			eend $?
		fi
	fi

	if [ ${PG_START_LB} == "yes" ]; then
		ebegin "Starting PGCluster load balancer instance"
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pglb -D ${PGDATA} -l" >/dev/null
		retval=$?
		sleep 1
		if [ ! -f "$PGDATA/pglb.pid" ] ; then
			eerror "Where's the pid file?"
			eend 1 
		else
			local pid=$(grep "^[0-9]\+" "$PGDATA/pglb.pid")
			test -d /proc/"${pid}" 
			eend $?
		fi
	fi
	return
}

stop() {
	local retval

	if [ ${PG_START_LB} == "yes" ]; then
		ebegin "Stopping PGCluster Load Balancer instance"
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pglb -D ${PGDATA} -l stop" >/dev/null
		eend $?
	fi
	if [ ${PG_START_REPLICATE} == "yes" ]; then
		ebegin "Stopping PGCluster Replicate instance"
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pgreplicate -D ${PGDATA} -l stop" >/dev/null
		eend $?
	fi


	if [ ${PG_START_DB} == "yes" ]; then 
		ebegin "Stopping PGCLuster database (this can take up to $(( ${WAIT_FOR_DISCONNECT} + ${WAIT_FOR_CLEANUP} )) seconds)"
		if [ ! -f "$PGDATA/postmaster.pid" ] ; then
			ewarn "$PGDATA/postmaster.pid not found. Was it running?"
			eend 1
			return 0
		fi
		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl stop -t ${WAIT_FOR_DISCONNECT} -m smart" >/dev/null

		retval=$?
		[ $retval -eq 0 ] && eend $retval && return $retval

		ewarn "Some clients did not disconnect within ${WAIT_FOR_DISCONNECT} seconds."
		ewarn "Going to shutdown the server anyway."

		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl stop -m fast" >/dev/null

		retval=$?
		[ $retval -eq 0 ] && eend $retval && return $retval

		if [ ${WAIT_FOR_QUIT} -eq 0 ] ; then
			eerror "Server did not shut down and sending the SIGQUIT has been disabled."
			eend $retval
			return $retval
		fi

		ewarn "Shutting down the server gracefully failed."
		ewarn "Forcing it to shutdown which leads to a recover-run on next startup."

		su -l ${PGUSER} \
			-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl stop -m immediate" >/dev/null

		retval=$?
		[ $retval -eq 0 ] && eend $retval && return $retval

		eerror "Forced shutdown failed!!! Something is wrong with your system, please take care of it manually."
		eend $?
	fi
}

reload() {
	ebegin "Reloading PostgreSQL configuration"
	su -l ${PGUSER} \
		-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl reload" >/dev/null
	eend $?
}

setup() { 
	ebegin "Creating a new PGCluster database cluster" 
	if [ -d "${PGDATA}" ] ; then 
		eend 1 "${PGDATA} already exist" 
		return 
	fi 
	mkdir -p "${PGDATA}" 
	chown -Rf postgres:postgres "${PGDATA}" 
	chmod 0700 "${PGDATA}" 
	cd "${PGDATA}" # to avoid the: could not change directory to "/root" 
	su -c "/usr/bin/initdb --pgdata ${PGDATA}" postgres
	einfo "You can use the '/etc/init.d/pgcluster' script to run PostgreSQL instead"
	einfo "of 'pg_ctl'."
	eend $? 
}