#! /bin/sh
#
# Init script for virtlogd
#
# (c) 2015 Guido Guenther <agx@sigxcpu.org>
# based on the skeletons that comes with dh_make
#
### BEGIN INIT INFO
# Provides:          virtlogd
# Required-Start:    $local_fs $remote_fs $syslog
# Required-Stop:     $local_fs $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Libvirt logging daemon
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
export PATH
DAEMON=/usr/sbin/virtlogd
NAME=virtlogd
DESC="libvirt logging daemon"

test -x $DAEMON || exit 0
. /lib/lsb/init-functions

PIDFILE=/var/run/$NAME.pid
DODTIME=1                   # Time to wait for the server to die, in seconds

# Include libvirtd defaults if available
if [ -f /etc/default/virtlogd ] ; then
	. /etc/default/virtlogd
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
}

force_stop() {
# Forcefully kill the process
    [ ! -f "$PIDFILE" ] && return
    if running ; then
        kill -15 $pid
        # Is it really dead?
        [ -n "$DODTIME" ] && sleep "$DODTIME"s
        if running ; then
            kill -9 $pid
            [ -n "$DODTIME" ] && sleep "$DODTIME"s
            if running ; then
                echo "Cannot kill $LABEL (pid=$pid)!"
                exit 1
            fi
        fi
    fi
    rm -f $PIDFILE
    return 0
}

case "$1" in
  start)
      log_daemon_msg "Starting $DESC" "$NAME"
      if running ;  then
          log_progress_msg "already running"
          log_end_msg 0
          exit 0
      fi
      rm -f $PIDFILE
      start-stop-daemon --start --quiet --pidfile $PIDFILE \
			--exec $DAEMON -- -d $VIRTLOGD_ARGS
      if running; then
	  log_end_msg 0
      else
	  log_end_msg 1
      fi
      ;;
  stop)
      log_daemon_msg "Stopping $DESC" "$NAME"
      if ! running ;  then
          log_progress_msg "not running"
          log_end_msg 0
          exit 0
      fi
      start-stop-daemon --stop --quiet --pidfile $PIDFILE \
			--exec $DAEMON
      log_end_msg 0
      ;;
  force-stop)
      log_daemon_msg "Forcefully stopping $DESC" "$NAME"
      force_stop
      if ! running; then
	  log_end_msg 0
      else
	  log_end_msg 1
      fi
      ;;
  restart)
      log_daemon_msg "Restarting $DESC" "$DAEMON"
      start-stop-daemon --oknodo --stop --quiet --pidfile \
			/var/run/$NAME.pid --exec $DAEMON
      [ -n "$DODTIME" ] && sleep $DODTIME
      start-stop-daemon --start --quiet --pidfile \
			/var/run/$NAME.pid --exec $DAEMON -- -d $libvirtd_opts
      if running; then
	  log_end_msg 0
      else
	  log_end_msg 1
      fi
      ;;
  reload|force-reload)
      if running; then
          log_daemon_msg "Reloading configuration of $DESC" "$NAME"
	  start-stop-daemon --stop --signal 1 --quiet --pidfile \
			    /var/run/$NAME.pid --exec $DAEMON
	  log_end_msg 0
      else
          log_warning_msg "libvirtd not running, doing nothing."
      fi
      ;;
  status)
      log_daemon_msg "Checking status of $DESC" "$NAME"
      if running ;  then
          log_progress_msg "running"
          log_end_msg 0
      else
          log_progress_msg "not running"
          log_end_msg 1
          if [ -f "$PIDFILE" ] ; then
              exit 1
          else
              exit 3
          fi
      fi
      ;;
  *)
      N=/etc/init.d/libvirtd
      echo "Usage: $N {start|stop|restart|reload|force-reload|status|force-stop}" >&2
      exit 1
      ;;
esac

exit 0