#!/bin/sh
#------------------------------------------------------------------------------
# /usr/sbin/hwsupp_onlined                                         __FLI4LVER__
#
# This helper daemon drives the "online" LED whenever the router's online state
# changes. It registers an event handler for the state_changed_router_event
# and acts accordingly.
#
# Last Update:  $Id$
#------------------------------------------------------------------------------

# that's we
mom_process=$(basename $0)

# our MOM process ID
mom_id=$mom_process

# initialize MOM
. /usr/share/mom/core

# include API
. /etc/boot.d/exittrap.inc

# redirect output
exec >>/var/log/$mom_process.log 2>&1

# initialize logging
script="$(basename $0)[$$]"
facility=daemon
. /usr/share/logfunc.sh

############
# PROCESSES
############

# ignore all signals except
# - SIGTERM which calls hwsupp_onlined_exit
exit_trap_ignore_all_signals
exit_trap_install_for_signal TERM hwsupp_onlined_exit

# Sends a stop_service_message to hwsupp_onlined.
hwsupp_onlined_exit()
{
    log_warn "SIGTERM received"
    mom_unicast_message $mom_process stop_service_message >/dev/null
    # return non-zero to prevent hwsupp_onlined from being terminated via "exit"
    return 1
}

# Sets the state of all LEDs of type "online".
# Input:
#   $1 = router state (e.g. "online" or "offline")
#
hwsupp_onlined_set_leds()
{(
    local newstate
    case $1 in
    offline)
        newstate=off
        ;;
    online)
        newstate=on
        ;;
    *)
        log_warn "hwsupp_onlined_set_leds: unsupported state $1"
        return 1
        ;;
    esac

    # include hwsupp.conf on each event, so we are prepared to properly handle
    # dynamic reconfigurations of hwsupp's LED configuration
    . /var/run/hwsupp.conf

    local i
    for i in $(seq 1 ${hwsupp_led_n:-0})
    do
        eval local action=\$hwsupp_led_${i}
        [ "$action" = "online" ] && hwsupp_setled $i $newstate
    done
)}

###############################
# EVENT HANDLERS: STATE EVENTS
###############################

handle_state_changed_router_event()
{
    hwsupp_onlined_set_leds $state_changed_router_event_new_state
}

###################################
# EVENT HANDLERS: SERVICE MESSAGES
###################################

handle_stop_service_message()
{
    mom_quit_message_loop 0
    reply_message_for=$message_id \
        mom_unicast_message $message_sender stop_service_reply_message
}

handle_service_message()
{
    log_warn \
        "handle_service_message($message_id#$message_sender:$message_type): received but ignored"
}

###############
# MAIN PROGRAM
###############

log_info "starting"
mom_register_handler handle_state_changed_router_event state_changed_router_event
mom_register_handler handle_stop_service_message stop_service_message
mom_register_handler handle_service_message service_message

if fli4lctrl status >/dev/null
then
    hwsupp_onlined_set_leds online
else
    hwsupp_onlined_set_leds offline
fi

log_info "entering message loop"
mom_run_message_loop

log_info "exiting"