#!/bin/bash
# Bash oneliner to make the standby LED of a thinkpad flash regulary (frequency depending on system load)

while [ 1 -eq 1 ]; do echo 7 on > /proc/acpi/ibm/led && sleep 0.025 && echo 7 off > /proc/acpi/ibm/led && sleep $(echo $(( 100 - $( uptime | sed -e 's|^.*average: ||' -e 's|,.*$||' -e 's/\.//' -e 's|^0*||' | sed 's|^$|0|') )) | sed -e 's|^\([1-9]\)\([0-9][0-9]\)$|\1.\2|' -e 's|^[1-9][0-9]$|0.&|' -e 's|^[1-9]$|0.0&|' -e 's|^0$|0.01|' -e 's|^-.*|0.01|'); done