~upstart-devel/upstart/upstart-jobs

#!/bin/sh

#

# Copyright (c) 2007 Javier Fernandez-Sanguino <jfs@debian.org>

# Modified by Andrew Shadura <bugzilla@tut.by>

#

# This is free software; you may redistribute it and/or modify

# it under the terms of the GNU General Public License as

# published by the Free Software Foundation; either version 2,

# or (at your option) any later version.

#

# This is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License with

# the Debian operating system, in /usr/share/common-licenses/GPL;  if

# not, write to the Free Software Foundation, Inc., 59 Temple Place,

# Suite 330, Boston, MA 02111-1307 USA

#

### BEGIN INIT INFO

# Provides:          tayga

# Required-Start:    $network $local_fs $remote_fs

# Required-Stop:     $remote_fs

# Should-Start:      

# Should-Stop:

# Default-Start:     2 3 4 5

# Default-Stop:      0 1 6

# Short-Description: userspace NAT64

# Description: TAYGA is a stateless NAT64 userspace daemon.  Using the

#		in-kernel TUN network driver, TAYGA receives IPv4 and

#		IPv6 packets, translates them to the other protocol,

#		and sends the translated packets back using the same

#		TUN interface.

### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

DAEMON=/usr/sbin/tayga # Introduce the server's location here

NAME=tayga                    # Introduce the short server's name here

DESC="userspace NAT64"   # Introduce a short description here

PIDFILE=/var/run/$NAME.pid

test -x "$DAEMON" || exit 0

. /lib/lsb/init-functions

# Default options, these can be overriden by the information

# at /etc/default/$NAME

DAEMON_OPTS="--nodetach"          # Additional options given to the server

DIETIME=10              # Time to wait for the server to die, in seconds

                        # If this value is set too low you might not

                        # let some servers to die gracefully and

                        # 'restart' will not work

STARTTIME=2             # Time to wait for the server to start, in seconds

                        # If this value is set each time the server is

                        # started (on start or restart) the script will

                        # stall to try to determine if it is running

                        # If it is not set and the server takes time

                        # to setup a pid file the log message might

                        # be a false positive (says it did not start

                        # when it actually did)

TUN_DEVICE=$(sed -rn "/^[ \t]*tun-device/s/^[ \t]*tun-device[ \t]+//p" /etc/tayga.conf)

IPV6_PREFIX=$(sed -rn "/^[ \t]*prefix/s/^[ \t]*prefix[ \t]+//p" /etc/tayga.conf)

DYNAMIC_POOL=$(sed -rn "/^[ \t]*dynamic-pool/s/^[ \t]*dynamic-pool[ \t]+//p" /etc/tayga.conf)

CONFIGURE_IFACE="no"

CONFIGURE_NAT44="no"

# Include defaults if available

if [ -f "/etc/default/$NAME" ] ; then

    . "/etc/default/$NAME"

fi

if [ "$RUN" != "yes" ] ; then

    log_failure_msg "$NAME disabled, please adjust the configuration to your needs "

    log_failure_msg "and then set RUN to 'yes' in /etc/default/$NAME to enable it."

    exit 0

fi

set -e

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

    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

    pid=$(cat $PIDFILE)

    running_pid "$pid" "$DAEMON" || return 1

    return 0

}

start_server() {

    if [ "$CONFIGURE_IFACE" = "yes" ] ; then

		"$DAEMON" --mktun | logger -t "$NAME" -i

		ip link set "$TUN_DEVICE" up

		[ -n "$DYNAMIC_POOL" ] && ip route add "$DYNAMIC_POOL" dev "$TUN_DEVICE"

		[ -n "$IPV6_PREFIX" ] && ip route add "$IPV6_PREFIX" dev "$TUN_DEVICE"

		[ -n "$IPV4_TUN_ADDR" ] && ip addr add "$IPV4_TUN_ADDR" dev "$TUN_DEVICE"

		[ -n "$IPV6_TUN_ADDR" ] && ip addr add "$IPV6_TUN_ADDR" dev "$TUN_DEVICE"

    fi

    [ "$CONFIGURE_NAT44" = "yes" ] && [ -n "$DYNAMIC_POOL" ] && iptables -t nat -A POSTROUTING -s "$DYNAMIC_POOL" -j MASQUERADE || true

	start-stop-daemon --start --quiet \

		-b --exec "$DAEMON" --  --pidfile "$PIDFILE" $DAEMON_OPTS

}

stop_server() {

	start-stop-daemon --stop --quiet --pidfile "$PIDFILE"

	errcode=$?

	if [ "$CONFIGURE_IFACE" = "yes" ] ; then

		ip link set "$TUN_DEVICE" down

		"$DAEMON" --rmtun | logger -t "$NAME" -i

	fi

	[ "$CONFIGURE_NAT44" = "yes" ] && [ -n "$DYNAMIC_POOL" ] && iptables -t nat -D POSTROUTING -s "$DYNAMIC_POOL" -j MASQUERADE || true

	rm -f "$PIDFILE"

	return $errcode

}

force_stop() {

# Force the process to die killing it manually

    [ ! -e "$PIDFILE" ] && return

    if running ; then

        kill -15 $pid

        # Is it really dead?

        sleep "$DIETIME"s

        if running ; then

            kill -9 $pid

            sleep "$DIETIME"s

            if running ; then

                echo "Cannot kill $NAME (pid=$pid)!"

                exit 1

            fi

        fi

    fi

    rm -f "$PIDFILE"

}

case "$1" in

  start)

        log_daemon_msg "Starting $DESC" "$NAME"

        # Check if it's running first

        if running ;  then

            log_progress_msg "apparently already running"

            log_end_msg 0

            exit 0

        fi

        if start_server ; then

            # NOTE: Some servers might die some time after they start,

            # this code will detect this issue if STARTTIME is set

            # to a reasonable value

            [ -n "$STARTTIME" ] && sleep $STARTTIME # Wait some time 

            if  running ;  then

                # It's ok, the server started and is running

                log_end_msg 0

            else

                # It is not running after we did start

                log_end_msg 1

            fi

        else

            # Either we could not start it

            log_end_msg 1

        fi

        ;;

  stop)

        log_daemon_msg "Stopping $DESC" "$NAME"

        if running ; then

            # Only stop the server if we see it running

            errcode=0

            stop_server || errcode=$?

            log_end_msg $errcode

        else

            # If it's not running don't do anything

            log_progress_msg "apparently not running"

            log_end_msg 0

            exit 0

        fi

        ;;

  force-stop)

        # First try to stop gracefully the program

        $0 stop

        if running; then

            # If it's still running try to kill it more forcefully

            log_daemon_msg "Stopping (force) $DESC" "$NAME"

            errcode=0

            force_stop || errcode=$?

            log_end_msg $errcode

        fi

        ;;

  restart|force-reload)

        log_daemon_msg "Restarting $DESC" "$NAME"

        errcode=0

        stop_server || errcode=$?

        # Wait some sensible amount, some server need this

        [ -n "$DIETIME" ] && sleep $DIETIME

        start_server || errcode=$?

        [ -n "$STARTTIME" ] && sleep $STARTTIME

        running || errcode=$?

        log_end_msg $errcode

        ;;

  status)

        log_daemon_msg "Checking status of $DESC" "$NAME"

        if running ;  then

            log_progress_msg "running"

            log_end_msg 0

        else

            log_progress_msg "apparently not running"

            log_end_msg 1

            exit 1

        fi

        ;;

  # Use this if the daemon cannot reload

  reload)

        log_warning_msg "Reloading $NAME daemon: not implemented, as the daemon"

        log_warning_msg "cannot re-read the config file (use restart)."

        ;;

  *)

        N=/etc/init.d/$NAME

        echo "Usage: $N {start|stop|force-stop|restart|force-reload|status}" >&2

        exit 1

        ;;

esac

exit 0