WhyCan Forum(哇酷开发者社区)

#!/bin/sh
trap 'echo "INTERRUPTED!";rgb_off; exit' INT
trap 'echo "TERMED!";rgb_off; exit' TERM
rgb()
{
        echo 1 > /sys/class/leds/licheepi:red:usr/brightness
        sleep $1
        echo 0 > /sys/class/leds/licheepi:red:usr/brightness
        echo 1 > /sys/class/leds/licheepi:green:usr/brightness
        sleep $1
        echo 0 > /sys/class/leds/licheepi:green:usr/brightness
        echo 1 > /sys/class/leds/licheepi:blue:usr/brightness
        sleep $1
        echo 0 > /sys/class/leds/licheepi:blue:usr/brightness
}

rgb_off()
{
        echo 0 > /sys/class/leds/licheepi:red:usr/brightness
        echo 0 > /sys/class/leds/licheepi:green:usr/brightness
        echo 0 > /sys/class/leds/licheepi:blue:usr/brightness
}

while true;
do
        rgb $1;
done