#!/bin/sh
### BEGIN INIT INFO
# Provides:          ovirt-guest-agent
# Required-Start:    $remote_fs
# Required-Stop:     $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: ovirt-guest-agent
# Description:       oVirt management agent running inside the guest
### END INIT INFO

# Author: Zheng Sheng, Zhou <zhshzhou@linux.vnet.ibm.com>

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/bin:/usr/bin
DESC="oVirt management agent"
NAME=ovirt-guest-agent
DAEMON=/usr/share/ovirt-guest-agent/ovirt-guest-agent.py
DAEMON_ARGS=""
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# 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

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
	touch "$PIDFILE"
	chown ovirtagent:ovirtagent "$PIDFILE"
	chown ovirtagent:ovirtagent /var/log/ovirt-guest-agent
	[ -f /var/log/ovirt-guest-agent/ovirt-guest-agent.log ] && \
		chown ovirtagent:ovirtagent /var/log/ovirt-guest-agent/ovirt-guest-agent.log
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --user ovirtagent --start --quiet --pidfile "$PIDFILE" \
		--startas "$DAEMON" --test > /dev/null || return 1
	start-stop-daemon --chuid ovirtagent:ovirtagent --background \
		--chdir /usr/share/ovirt-guest-agent --start --quiet \
		--pidfile "$PIDFILE" --startas "$DAEMON" -- \
		"$DAEMON_ARGS" || return 2
}

#
# 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 --user ovirtagent --stop --quiet --retry=TERM/30/KILL/5 \
		--pidfile "$PIDFILE" --startas "$DAEMON"
	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 --user ovirtagent --stop --quiet --oknodo \
		--retry=0/30/KILL/5 --startas "$DAEMON"
	[ "$?" = 2 ] && return 2
	[ "$RETVAL" -le 1 ] && rm -f "$PIDFILE"
	return "$RETVAL"
}

case "$1" in
  start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
    do_start
    case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
  ;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
		# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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