OpenWrt – Rev 3

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#!/bin/sh /etc/rc.common
# Copyright (C) 2008 OpenWrt.org

START=96

load_led() {
        local name
        local sysfs
        local trigger
        local dev
        local ports
        local mode
        local default
        local delayon
        local delayoff
        local interval

        config_get sysfs $1 sysfs
        config_get name $1 name "$sysfs"
        config_get trigger $1 trigger "none"
        config_get dev $1 dev
        config_get ports $1 port
        config_get mode $1 mode "link"
        config_get_bool default $1 default "nil"
        config_get delayon $1 delayon
        config_get delayoff $1 delayoff
        config_get interval $1 interval "50"
        config_get port_state $1 port_state
        config_get delay $1 delay "150"
        config_get message $1 message ""
        config_get gpio $1 gpio "0"
        config_get inverted $1 inverted "0"

        if [ "$trigger" = "rssi" ]; then
                # handled by rssileds userspace process
                return
        fi

        [ "$trigger" = "usbdev" ] && {
                # Backward compatibility: translate to the new trigger
                trigger="usbport"
                # Translate port of root hub, e.g. 4-1 -> usb4-port1
                ports=$(echo "$dev" | sed -n 's/^\([0-9]*\)-\([0-9]*\)$/usb\1-port\2/p')
                # Translate port of extra hub, e.g. 2-2.4 -> 2-2-port4
                [ -z "$ports" ] && ports=$(echo "$dev" | sed -n 's/\./-port/p')
        }

        [ -e /sys/class/leds/${sysfs}/brightness ] && {
                echo "setting up led ${name}"

                printf "%s %s %d\n" \
                        "$sysfs" \
                        "$(sed -ne 's/^.*\[\(.*\)\].*$/\1/p' /sys/class/leds/${sysfs}/trigger)" \
                        "$(cat /sys/class/leds/${sysfs}/brightness)" \
                                >> /var/run/led.state

                [ "$default" = 0 ] &&
                        echo 0 >/sys/class/leds/${sysfs}/brightness

                echo $trigger > /sys/class/leds/${sysfs}/trigger 2> /dev/null
                ret="$?"

                [ $default = 1 ] &&
                        cat /sys/class/leds/${sysfs}/max_brightness > /sys/class/leds/${sysfs}/brightness

                [ $ret = 0 ] || {
                        echo >&2 "Skipping trigger '$trigger' for led '$name' due to missing kernel module"
                        return 1
                }
                case "$trigger" in
                "netdev")
                        [ -n "$dev" ] && {
                                echo $dev > /sys/class/leds/${sysfs}/device_name
                                echo $mode > /sys/class/leds/${sysfs}/mode
                                echo $interval > /sys/class/leds/${sysfs}/interval
                        }
                        ;;

                "timer"|"oneshot")
                        [ -n "$delayon" ] && \
                                echo $delayon > /sys/class/leds/${sysfs}/delay_on
                        [ -n "$delayoff" ] && \
                                echo $delayoff > /sys/class/leds/${sysfs}/delay_off
                        ;;

                "usbport")
                        local p

                        for p in $ports; do
                                echo 1 > /sys/class/leds/${sysfs}/ports/$p
                        done
                        ;;

                "port_state")
                        [ -n "$port_state" ] && \
                                echo $port_state > /sys/class/leds/${sysfs}/port_state
                        ;;

                "gpio")
                        echo $gpio > /sys/class/leds/${sysfs}/gpio
                        echo $inverted > /sys/class/leds/${sysfs}/inverted
                        ;;

                switch[0-9]*)
                        local port_mask speed_mask

                        config_get port_mask $1 port_mask
                        [ -n "$port_mask" ] && \
                                echo $port_mask > /sys/class/leds/${sysfs}/port_mask
                        config_get speed_mask $1 speed_mask
                        [ -n "$speed_mask" ] && \
                                echo $speed_mask > /sys/class/leds/${sysfs}/speed_mask
                        ;;
                esac
        }
}

start() {
        [ -e /sys/class/leds/ ] && {
                [ -s /var/run/led.state ] && {
                        local led trigger brightness
                        while read led trigger brightness; do
                                [ -e "/sys/class/leds/$led/trigger" ] && \
                                        echo "$trigger" > "/sys/class/leds/$led/trigger"

                                [ -e "/sys/class/leds/$led/brightness" ] && \
                                        echo "$brightness" > "/sys/class/leds/$led/brightness"
                        done < /var/run/led.state
                        rm /var/run/led.state
                }

                config_load system
                config_foreach load_led led
        }
}