#!/bin/bash
# Start/stop/restart reniced.

### BEGIN INIT INFO
# Provides:          reniced
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start the reniced service.
# Description:       Service that periodically checks and changes runtime niceness of given (by name) processes.
### END INIT INFO


# Start reniced:
_start() {
  echo -n "Starting Reniced daemon:  /usr/sbin/reniced"
  /usr/sbin/reniced
  echo
}

# Stop reniced:
_stop() {
  echo -n "Stopping Reniced daemon..."
  if [ -r /var/run/reniced.pid ]; then
    kill -HUP "$(cat /var/run/reniced.pid)"
    rm -f "/var/run/reniced.pid"
  else
    killall -HUP -q reniced
  fi
  echo
}

# Restart renicedd:
_restart() {
  _stop
  sleep 1
  _start
}

# Check if reniced is running
_status() {
  if [ -e /var/run/reniced.pid ]; then
    echo "reniced is running as pid $(cat /run/reniced.pid)."
  else 
    echo "reniced is stopped."
    exit 1
  fi
}

case "$1" in
'start')
  _start
  ;;
'stop')
  _stop
  ;;
'restart')
  _restart
  ;;
'status')
  _status
  ;;
*)
  echo "usage $0 start|stop|restart|status"
esac