#! /bin/sh
### BEGIN INIT INFO
# Provides:          usbg
# Required-Start:    $local_fs
# Should-Start:
# Required-Stop:     $local_fs
# Should-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Example initscript
# Description:       This file should be used to construct scripts to be
#                    placed in /etc/init.d
### END INIT INFO

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin

DESC="Load USB gadget schemas"
NAME="usbgx"
DAEMON=/usr/bin/gadget-start
DAEMON_ARGS=""
PIDFILE=/var/run/$NAME.pid

. /etc/init.d/functions || exit 1

# 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

#
# Function that starts the daemon/service
#
do_start() {
    local status pid

    status=0
    pid=`pidofproc $NAME` || status=$?
    case $status in
        0)
            echo "$DESC already running ($pid)."
            exit 1
            ;;
        *)
            echo "Starting $DESC ..."
            exec $DAEMON $DAEMON_ARGS >/dev/null 2>&1 || status=$?
            echo "ERROR: Failed to start $DESC."
            exit $status
            ;;
    esac
}

#
# Function that stops the daemon/service
#
do_stop() {
    local pid status

    status=0
    pid=`pidofproc $NAME` || status=$?
    case $status in
        0)
            # Exit when fail to stop, the kill would complain when fail
            kill -s 15 $pid >/dev/null && rm -f $PIDFILE && \
                echo "Stopped $DESC ($pid)." || exit $?
            ;;
        *)
            echo "$DESC is not running; none killed." >&2
            ;;
    esac

    return $status
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
    local pid status

    status=0
    # If the daemon can reload its configuration without
    # restarting (for example, when it is sent a SIGHUP),
    # then implement that here.
    pid=`pidofproc $NAME` || status=$?
    case $status in
        0)
            echo "Reloading $DESC ..."
            kill -s 1 $pid || exit $?
            ;;
        *)
            echo "$DESC is not running; none reloaded." >&2
            ;;
    esac
    exit $status
}


#
# Function that shows the daemon/service status
#
status_of_proc () {
    local pid status

    status=0
    # pidof output null when no program is running, so no "2>/dev/null".
    pid=`pidofproc $NAME` || status=$?
    case $status in
        0)
            echo "$DESC is running ($pid)."
            exit 0
            ;;
        *)
            echo "$DESC is not running." >&2
            exit $status
            ;;
    esac
}

case "$1" in
    start)
        do_start
        ;;
    stop)
        do_stop || exit $?
        ;;
    status)
        status_of_proc
        ;;
    restart)
        # Always start the service regardless the status of do_stop
        do_stop
        do_start
        ;;
    try-restart|force-reload)
        do_stop && do_start
        ;;
    *)
        echo "Usage: $0 {start|stop|status|restart|try-restart|force-reload}" >&2
        exit 3
        ;;
esac