#!/bin/bash 
#
# Modified from original source: Elastic Search
# https://github.com/elasticsearch/elasticsearch
# Thank you to the Elastic Search authors
#
# chkconfig: 2345 99 01
#
### BEGIN INIT INFO
# Provides:          TDEngine
# Required-Start:    $local_fs $network $syslog
# Required-Stop:     $local_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts TDEngine taosd
# Description:       Starts TDEngine taosd, a time-series database engine
### END INIT INFO

set -e

PATH="/bin:/usr/bin:/sbin:/usr/sbin"
NAME="TDEngine"
USER="root"
GROUP="root"
DAEMON="/usr/local/taos/bin/taosd"
DAEMON_OPTS=""
PID_FILE="/var/run/$NAME.pid"
APPARGS=""

# Maximum number of open files
MAX_OPEN_FILES=65535

. /lib/lsb/init-functions

case "$1" in
    start)

        log_action_begin_msg "Starting TDEngine..."
        if start-stop-daemon --test --start --chuid "$USER:$GROUP" --background --make-pidfile --pidfile "$PID_FILE" --exec "$DAEMON" -- $APPARGS &> /dev/null; then

            touch "$PID_FILE" && chown "$USER":"$GROUP" "$PID_FILE"

            if [ -n "$MAX_OPEN_FILES" ]; then
                ulimit -n $MAX_OPEN_FILES
            fi

            start-stop-daemon --start --chuid "$USER:$GROUP" --background --make-pidfile --pidfile "$PID_FILE" --exec "$DAEMON" -- $APPARGS

            log_end_msg $?
        fi
        ;;

    stop)
        log_action_begin_msg "Stopping TDEngine..."
        set +e
        if [ -f "$PID_FILE" ]; then
            start-stop-daemon --stop --pidfile "$PID_FILE" --user "$USER" --retry=TERM/120/KILL/5 > /dev/null
            if [ $? -eq 1 ]; then
                log_action_cont_msg "TSD is not running but pid file exists, cleaning up"
            elif [ $? -eq 3 ]; then
                PID="`cat $PID_FILE`"
                log_failure_msg "Failed to stop TDEngine (pid $PID)"
                exit 1
            fi
            rm -f "$PID_FILE"
        else
            log_action_cont_msg "TDEngine was not running"
        fi
        log_action_end_msg 0
        set -e
        ;;

    restart|force-reload)
        if [ -f "$PID_FILE" ]; then
            $0 stop
            sleep 1
        fi
        $0 start
        ;;
    status)
        status_of_proc -p "$PID_FILE" "$DAEMON" "$NAME"
        ;;
    *)
        exit 1
        ;;
esac

exit 0