#!/bin/sh
# /etc/init.d/redash_supervisord
### BEGIN INIT INFO
# Provides:          supervisord
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: process supervisor
### END INIT INFO

# Author: Ron DuPlain <ron.duplain@gmail.com>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin
NAME=supervisord
DESC="process supervisor"
DAEMON=/usr/local/bin/$NAME
DAEMON_ARGS="--configuration /opt/redash/supervisord/supervisord.conf "
PIDFILE=/opt/redash/supervisord/supervisord.pid
SCRIPTNAME=/etc/init.d/redash_supervisord
USER=redash

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

. /etc/rc.d/init.d/functions

#
# Function that starts the daemon/service
#

do_start()
{
    # Return
    #   0 if daemon has been started
    #   1 if daemon was already running
    #   2 if daemon could not be started
    start-stop-daemon --start --quiet --pidfile $PIDFILE --user $USER --chuid $USER --exec $DAEMON --test > /dev/null \
        || return 1
    start-stop-daemon --start --quiet --pidfile $PIDFILE --user $USER --chuid $USER --exec $DAEMON -- \
        $DAEMON_ARGS \
        || return 2
    # Add code here, if necessary, that waits for the process to be ready
    # to handle requests from services started subsequently which depend
    # on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#

do_stop()
{
    # Return
    #   0 if daemon has been stopped
    #   1 if daemon was already stopped
    #   2 if daemon could not be stopped
    #   other if a failure occurred
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --user $USER --chuid $USER --name $NAME
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2
    # Wait for children to finish too if this is a daemon that forks
    # and if the daemon is only ever run from this initscript.
    # If the above conditions are not satisfied then add some other code
    # that waits for the process to drop all resources that could be
    # needed by services started subsequently.  A last resort is to
    # sleep for some time.
    start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --user $USER --chuid $USER --exec $DAEMON
    [ "$?" = 2 ] && return 2
    # Many daemons don't delete their pidfiles when they exit.
    rm -f $PIDFILE
    return "$RETVAL"
}

case "$1" in
  start)
    [ "$VERBOSE" != no ] && echo "Starting $DESC" "$NAME"
    do_start
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && echo 0 ;;
        2) [ "$VERBOSE" != no ] && echo 1 ;;
    esac
    ;;
  stop)
    [ "$VERBOSE" != no ] && echo "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && echo 0 ;;
        2) [ "$VERBOSE" != no ] && echo 1 ;;
    esac
    ;;
  status)
       status -p "$STASH_PID" stash
       # status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  restart)
    echo "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
      0|1)
        do_start
        case "$?" in
            0) echo 0 ;;
            1) echo 1 ;; # Old process is still running
            *) echo 1 ;; # Failed to start
        esac
        ;;
      *)
        # Failed to stop
        echo 1
        ;;
    esac
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|status|restart}" >&2
    exit 3
    ;;
esac