#!/bin/sh -e
# 
# smartmontools init.d startup script
#
# (C) 2003,04,07 Guido Günther <agx@sigxcpu.org>
# 
# loosely based on the init script that comes with smartmontools which is
# copyrighted 2002 by Bruce Allen <smartmontools-support@lists.sourceforge.net>
#
### BEGIN INIT INFO
# Provides:          smartmontools
# Required-Start:    $syslog $remote_fs
# Required-Stop:     $syslog $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      1
# Short-Description: SMART monitoring daemon
### END INIT INFO

SMARTCTL=/usr/sbin/smartctl
DAEMON=/usr/sbin/smartd
PIDFILE=/var/run/smartd.pid
[ -x $SMARTCTL ] || exit 0
[ -x $DAEMON ] || exit 0
. /lib/lsb/init-functions

RET=0

[ -r /etc/default/rcS ] && . /etc/default/rcS
[ -r /etc/default/smartmontools ] && . /etc/default/smartmontools

smartd_opts="--pidfile $PIDFILE $smartd_opts"

enable_smart() {
  log_action_begin_msg "Enabling S.M.A.R.T."
  for device in $enable_smart; do
      log_action_cont_msg "$device"
      if ! $SMARTCTL --quietmode=errorsonly --smart=on $device; then
          log_action_cont_msg "(failed)"
          RET=2
      fi
  done
  log_action_end_msg 0
}

check_start_smartd_option() {
  if [ ! "$start_smartd" = "yes" ]; then
    [ "$VERBOSE" = "yes" ] && log_warning_msg "Not starting S.M.A.R.T. daemon smartd, disabled via /etc/default/smartmontools"
    return 1
  else
    return 0
  fi
}

running_pid()
{
    # Check if a given process pid's cmdline matches a given name
    pid=$1
    name=$2
    [ -z "$pid" ] && return 1 
    [ ! -d /proc/$pid ] &&  return 1
    cmd=`cat /proc/$pid/cmdline | tr "\000" "\n"|head -n 1 |cut -d : -f 1`
    # Is this the expected child?
    [ "$cmd" != "$name" ] &&  return 1
    return 0
}

running()
{
# Check if the process is running looking at /proc
# (works for all users)
    # No pidfile, probably no daemon present
    [ ! -f "$PIDFILE" ] && return 1
    # Obtain the pid and check it against the binary name
    pid=`cat $PIDFILE`
    running_pid $pid $DAEMON || return 1
    return 0
}

case "$1" in
  start)
        [ -n "$enable_smart" ] && enable_smart
	if check_start_smartd_option; then

	    log_daemon_msg "Starting S.M.A.R.T. daemon" "smartd"
	    if running; then
	        log_progress_msg "already running"
	        log_end_msg 0
	        exit 0
	    fi
	    rm -f $PIDFILE
	    if start-stop-daemon --start --quiet --pidfile $PIDFILE \
	                --exec $DAEMON -- $smartd_opts; then 
	        log_end_msg 0
	    else
	        log_end_msg 1
	        RET=1
	    fi
	fi
	;;
  stop)
	log_daemon_msg "Stopping S.M.A.R.T. daemon" "smartd"
	start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
	log_end_msg 0
	;;
  reload|force-reload)
	  log_daemon_msg "Reloading S.M.A.R.T. daemon" "smartd"
	if start-stop-daemon --stop --quiet --signal 1 \
	                --pidfile $PIDFILE; then
	    log_end_msg 0
	else
	    log_end_msg 1
	    RET=1
	fi
	  ;;
  restart)
	if check_start_smartd_option; then
	    log_daemon_msg "Restarting S.M.A.R.T. daemon" "smartd"
	    start-stop-daemon --stop --quiet --oknodo --retry 30 --pidfile $PIDFILE
	    rm -f $PIDFILE
	    if start-stop-daemon --start --quiet --pidfile $PIDFILE \
	                --exec $DAEMON -- $smartd_opts; then 
	        log_end_msg 0
	    else
	        log_end_msg 1
	        RET=1
	    fi
	fi
        ;;
  status)
	status_of_proc $DAEMON smartd && exit 0 || exit $?
	;;
  *)
	echo "Usage: /etc/init.d/smartmontools {start|stop|restart|reload|force-reload|status}"
	exit 1
esac

exit $RET