#!/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 $
# Modifications to support Alpine Linux pg-restore

opts="${opts} reload setup"

depend() {
	use net
	after firewall
}

checkconfig() {
	[ -d "$PGDATA/base" ] && return 0
	echo "checking config"

	if [ -z "$AUTO_SETUP" ] ; then
		eerror "Database not found at: $PGDATA"
		eerror "Please make sure that PGDATA points to the right path."
		eerror "You can run '/etc/init.d/postgresql setup' to setup a new database cluster."
		return 1
	fi
	setup
}

start() {
	checkconfig || return 1

	ebegin "Starting PostgreSQL"

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

	local retval

	su -l ${PGUSER} \
		-c "env PGDATA=\"${PGDATA}\" /usr/bin/pg_ctl start ${WAIT_FOR_START} -o '--silent-mode=true ${PGOPTS}'" >/dev/null
	retval=$?
	[ $retval -ne 0 ] && eend $retval && return $retval

	# 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
		return 1
	fi

	local pid=$(grep "^[0-9]\+" "$PGDATA/postmaster.pid")
	test -d /proc/"${pid}" 
	eend $?
}

stop() {
	ebegin "Stopping PostgreSQL (this can take up to $(( ${WAIT_FOR_DISCONNECT} + ${WAIT_FOR_CLEANUP} )) seconds)"

	local retval

	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 $?
}

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 PostgreSQL database cluster" 
	
	if [ -d "${PGDATA}/base" ] ; then 
		eend 1 "${PGDATA}/base already exists" 
		return 
	fi 

	mkdir -p "${PGDATA}"  2>/dev/null

	# If the pg_hba.conf and friends exist, move them
	local tmpdir="$( dirname "$PGDATA" )/tmp"
	mkdir -p "${tmpdir}" >/dev/null
	echo mv "${PGDATA}"/* "${tmpdir}" 
	mv "${PGDATA}"/* "${tmpdir}"  2>/dev/null

	rm -rf "${PGDATA}"/* 2>/dev/null
	chown -Rf postgres:postgres "${PGDATA}" 
	chmod 0700 "${PGDATA}" 
	cd "${PGDATA}" # to avoid the: could not change directory to "/root" 
	su -c "/usr/bin/initdb --pgdata ${PGDATA}" postgres
	einfo "You can use the '/etc/init.d/postgresql' script to run PostgreSQL instead"
	einfo "of 'pg_ctl'."
	local res=$?

	# move the pg_hba.conf and friends
	mv $tmpdir/* "$PGDATA" 2>/dev/null 
	rm -rf $tmpdir 2>/dev/null

	# Do not send a SIGHUP to postmaster;  its not necessary for a new database
	# and allows pg-restore to do a blind restore of an old database

	eend $res
}