LazyLibrarian/init/ubuntu.initd

#! /bin/sh

# Copyright (C) 2011- by Mar2zz <LaSi.Mar2zz@gmail.com>
# released under GPL, version 2 or later


################################################
#                                              #
#  TO CONFIGURE EDIT /etc/default/lazylibrarian
#                                              #
################################################

### BEGIN INIT INFO
# Provides:          LazyLibrarian application instance
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts instance of LazyLibrarian
# Description:       starts instance of LazyLibrarian using start-stop-daemon
### END INIT INFO


# main variables
DAEMON=/usr/bin/python
SETTINGS=/etc/default/lazylibrarian

SETTINGS_LOADED=FALSE

DESC=LazyLibrarian

# only accept values from /etc/default/lazylibrarian
unset RUN_AS CONFIG DATADIR PID_FILE

. /lib/lsb/init-functions

[ -x $DAEMON ] || {
    log_warning_msg "$DESC: Can't execute daemon, aborting. See $DAEMON";
    return 1; }

[ -r $SETTINGS ] || {
    log_warning_msg "$DESC: Can't read settings, aborting. See $SETTINGS";
    return 1; }

check_retval() {
    if [ $? -eq 0 ]; then
        log_end_msg 0
        return 0
    else
        log_end_msg 1
        exit 1
    fi
}

load_settings() {
    if [ $SETTINGS_LOADED != "TRUE" ]; then
        . $SETTINGS

        [ -n "$APP_PATH" ] || {
            log_warning_msg "$DESC: path to $DESC not set, aborting. See $SETTINGS";
            return 1; }

        [ $ENABLE_DAEMON != 1 ] && {
            log_warning_msg "$DESC: daemon not enabled, aborting. See $SETTINGS";
            return 1; }

        [ -z "$RUN_AS" ] && {
            log_warning_msg "$DESC: daemon username not set, aborting. See $SETTINGS";
            return 1; }
        [ -z "${RUN_AS%:*}" ] && exit 1

        DAEMON_OPTS="LazyLibrarian.py --quiet -d --nolaunch"
        [ -n "$CONFIG" ] && DAEMON_OPTS="$DAEMON_OPTS --config=$CONFIG"
        [ -z "$CONFIG" ] && DAEMON_OPTS="$DAEMON_OPTS --config=/home/$RUN_AS/.lazylibrarian/config.ini"
        [ -n "$DATADIR" ] && DAEMON_OPTS="$DAEMON_OPTS --datadir=$DATADIR"
        [ -z "$DATADIR" ] && DAEMON_OPTS="$DAEMON_OPTS --datadir=/home/$RUN_AS/.lazylibrarian"
        [ -n "$PORT" ] && DAEMON_OPTS="$DAEMON_OPTS --port=$PORT"
        if ! [ -n "$PID_FILE" ]; then
            PID_FILE=/var/run/lazylibrarian/lazylibrarian.pid
        fi
        DAEMON_OPTS="$DAEMON_OPTS --pidfile=$PID_FILE"
        SETTINGS_LOADED=TRUE
    fi
    return 0
}

load_settings || exit 0

is_running () {
    # returns 1 when running, else 0.
    PID=$(pgrep -f "$DAEMON_OPTS")
    RET=$?
    [ $RET -gt 1 ] && exit 1 || return $RET
}

handle_pid () {
    PID_PATH=`dirname $PID_FILE`
    [ -d $PID_PATH ] || mkdir -p $PID_PATH && chown -R $RUN_AS $PID_PATH > /dev/null || {
        log_warning_msg "$DESC: Could not create $PID_FILE, aborting.";
        return 1;}
}

enable_updates () {
    chown -R $RUN_AS $APP_PATH > /dev/null || {
        log_warning_msg "$DESC: $APP_PATH not writable for web-updates, See $SETTINGS";
        return 0; }
}

start_lazylibrarian () {
    if ! is_running; then
        log_daemon_msg "Starting $DESC"
        [ "$WEB_UPDATE" = 1 ] && enable_updates
        handle_pid
        start-stop-daemon -o -d $APP_PATH -c $RUN_AS --start --pidfile $PID_FILE --exec $DAEMON -- $DAEMON_OPTS
        check_retval
    else
        log_success_msg "$DESC: already running (pid $PID)"
    fi
}

stop_lazylibrarian () {
    if is_running; then
        log_daemon_msg "Stopping $DESC"
        start-stop-daemon -o --stop --pidfile $PID_FILE --retry 15
        check_retval
    else
        log_success_msg "$DESC: not running"
    fi
}


case "$1" in
    start)
        start_lazylibrarian
        ;;
    stop)
        stop_lazylibrarian
        ;;
    restart|force-reload)
        stop_lazylibrarian
        start_lazylibrarian
        ;;
    *)
        N=/etc/init.d/$NAME
        echo "Usage: $N {start|stop|restart|force-reload}" >&2
        exit 1
        ;;
esac

exit 0