#! /bin/sh

### BEGIN INIT INFO
# Provides:          softflowd
# Required-Start:    $network $remote_fs $syslog
# Required-Stop:     $network $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Flow-based network traffic analyser.
### END INIT INFO

# Author: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
# Based on /etc/init.d/skeleton, written by
# Miquel van Smoorenburg <miquels@cistron.nl>,
# modified for Debian by Ian Murdock <imurdock@gnu.ai.mit.edu>.

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DAEMON=/usr/sbin/softflowd
NAME=softflowd
DESC="Flow-based network traffic analyser"
DEFAULT=/etc/default/$NAME
PIDFILE=/var/run/$NAME.pid
PRIVDROP_CHROOT_DIR=/var/run/softflowd/chroot

test -x "$DAEMON" || exit 0

# Include softflowd defaults if available
INTERFACE=
OPTIONS=
[ -r "$DEFAULT" ] && . "$DEFAULT"

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

# Define LSB log_* functions.
. /lib/lsb/init-functions


case "$1" in
start|restart|force-reload)
    if [ -z "$INTERFACE" ] ; then
	log_daemon_msg "NOT starting $DESC" "$NAME"
	log_action_msg "\nEdit $DEFAULT and define the INTERFACE variable"
	log_end_msg 1
	exit 0
    fi
    ;;
esac

[ -d "$PRIVDROP_CHROOT_DIR" ] || mkdir -p "$PRIVDROP_CHROOT_DIR"

#
# 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 \
	--exec $DAEMON --test > /dev/null || \
	return 1
    start-stop-daemon --start --quiet --pidfile $PIDFILE \
	--exec $DAEMON -- -i "$INTERFACE" $OPTIONS || \
	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 --stop --quiet --retry=TERM/30/KILL/5 \
	--pidfile $PIDFILE --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 \
	--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 ] && 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)
    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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