#!/bin/bash

# Slackware build script for pgpool-II

# Copyright 2018, Dejan Strbac <me@dejanstrbac.com>
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

LOGFILE=/var/log/postgresql
PGPOOL=/usr/bin/pgpool
PIDPATH=/var/run/pgpool
PIDFILE=$PIDPATH/pgpool.pid

[ ! -d $PIDPATH ] && mkdir $PIDPATH

case "$1" in

    "start")
        echo "Starting pgpool-II"
        if [ $(pgrep -f $PGPOOL) ]; then
            echo "pgpool daemon already running"
	    if [ ! -f $PIDFILE ]; then
                 echo "Warning: Missing pid file $PIDFILE"
	    fi
            exit 1

        else 
            $PGPOOL 
            exit 0
        fi  
    ;;

    "stop")
        echo "Shutting down pgpool-II..."
        $PGPOOL stop
    ;;

    "force-stop")
        echo "Shutting down pgpool-II (fast)..."
        $PGPOOL -m fast stop
    ;;
    
    "restart")
        echo "Restarting pgpool-II..."
        if [ $(pgrep -f $PGPOOL) ]; then
            $PGPOOL stop; $PGPOOL
            exit 1
        else 
            $PGPOOL 
            exit 0
        fi  
    ;;

    "force-restart")
        echo "Restarting pgpool-II (fast)..."
        if [ $(pgrep -f $PGPOOL) ]; then
            $PGPOOL -m fast stop; $PGPOOL
            exit 1
        else 
            $PGPOOL 
            exit 0
        fi  
    ;;

    "reload")
        echo "Reloading configuration for pgpool-II..."
        $PGPOOL reload
    ;;

    "status")
        if [ $(pgrep -f $PGPOOL) ]; then
            echo "pgpool-II is running"
	    if [ ! -f $PIDFILE ]; then
                 echo "Warning: Missing pid file $PIDFILE"
	    fi
            exit 0
        else
            echo "pgpool-II is stopped"
	    if [ ! -f $PIDFILE ]; then
                 echo "Detected stale pid file $PIDFILE"
	    fi
            exit 0
        fi
    ;;

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