source: trunk/third/moira/debian/debathena-moira-update-server.init @ 25055

#! /bin/sh
### BEGIN INIT INFO
# Provides:          debathena-moira-update-server
# Required-Start:    $local_fs $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Moira update_server
# Description:       The moira update_server program for taking updates from
#                    moira
### END INIT INFO

# Author: Evan Broder <broder@mit.edu>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/sbin:/usr/bin:/sbin:/bin
DESC="Moira update_server"
NAME=debathena-moira-update-server
DAEMON=/usr/sbin/update_server
DAEMON_ARGS=""
SCRIPTNAME=/etc/init.d/$NAME
ENABLED=false
PIDFILE=/var/run/update_server.pid

# 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

# Exit if the daemon has not been enabled
[ "$ENABLED" = true ] || exit 0

# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS

# 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()
{
        # Return
        #   0 if daemon has been started
        #   1 if daemon was already running
        #   2 if daemon could not be started

        # Remove the following once #849 is fixed and update_server is 
        # capable of writing its own pidfile
        PID="$(pgrep -f $DAEMON)"
        if [ -n "$PID" ]; then
            if ! [ -f "$PIDFILE" ]; then
                echo "$PID" > $PIDFILE
            elif [ "$(cat $PIDFILE)" != "$PID" ]; then
                rm -f $PIDFILE
                echo "$PID" > $PIDFILE
            fi
        fi
        start-stop-daemon --start --quiet --pidfile $PIDFILE \
                --exec $DAEMON --test > /dev/null \
                || return 1
        start-stop-daemon --start --quiet --pidfile $PIDFILE \
                --exec $DAEMON -- \
                $DAEMON_ARGS \
                || return 2
        # Remove the following once #849 is fixed and update_server is 
        # capable of writing its own pidfile
        sleep 1
        # If we got here, we successfully started the daemon, 
        # so overwrite the PID file
        rm -f $PIDFILE
        PID="$(pgrep -f $DAEMON)"
        echo "$PID" > $PIDFILE
        # Add code here, if necessary, that waits for the process to be ready
        # to handle requests from services started subsequently which depend
        # on this one.  As a last resort, sleep for some time.
}

#
# 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 --pidfile $PIDFILE 
        RETVAL="$?"
        [ "$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=0/10/KILL/5 --exec $DAEMON
        [ "$?" = 2 ] && return 2
        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
        ;;
  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|restart|force-reload}" >&2
        exit 3
        ;;
esac

: