#! /bin/sh
### BEGIN INIT INFO
# Provides:          davmail
# 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: Launch Davmail Exchange gateway
# Description:       Prepare environement and launch the Davmail Exchange
#                    gateway daemon.
### END INIT INFO

# Author: Alexandre Rossi <alexandre.rossi@gmail.com>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Davmail Exchange gateway"
NAME=davmail
DAEMON=/usr/bin/$NAME
DAEMON_USER=_$NAME
HOME=/var/lib/$DAEMON_USER
PIDFILE=/var/run/$NAME.pid
LOGFILE=/var/log/$NAME/$NAME.log
SCRIPTNAME=/etc/init.d/$NAME


# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

DAEMON_ARGS="-server /etc/davmail/davmail.properties"

# Create logfiles if they do not exist
if [ ! -r "$LOGFILE" ]
then
    touch $LOGFILE
    chown $DAEMON_USER:adm $LOGFILE
fi

# 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

do_start()
{
    # Return
    #   0 if daemon has been started
    #   2 if daemon could not be started
    $ENABLE_DAEMON
    is_alive && return 0
    start-stop-daemon --start --pidfile $PIDFILE --chuid $DAEMON_USER\
        --background --make-pidfile\
        --exec $DAEMON -- $DAEMON_ARGS \
        || return 2
}

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 $DAEMON_USER --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2
    start-stop-daemon --user $DAEMON_USER --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
    [ "$?" = 2 ] && return 2
    rm -f $PIDFILE
    return "$RETVAL"
}

do_reload() {
    #
    # If the daemon can reload its configuration without
    # restarting (for example, when it is sent a SIGHUP),
    # then implement that here.
    #
    start-stop-daemon --user $DAEMON_USER --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
    return 0
}

is_alive () {
    ret=1
    if [ -r $PIDFILE ] ; then
        pid=`cat $PIDFILE`
        if [ -e /proc/$pid ] ; then
            procname=`/bin/ps h -p $pid -C $NAME`
            [ -n "$procname" ] && ret=0
        fi
    fi
    return $ret
}


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
        ;;
    reload|force-reload)
        log_daemon_msg "Reloading $DESC" "$NAME"
        do_reload
        log_end_msg $?
        ;;
    restart)
        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
        ;;
    status)
        echo -n "Status of $DESC: "
        if is_alive ; then
            echo "alive."
        else
            echo "dead."
            exit 1
        fi
        ;;
    *)
        echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload|status}" >&2
        exit 3
        ;;
esac

:
# vim: ts=4 sw=4 expandtab
