Aurium :: Load Average Notifier

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#!/bin/bash

# Load Average Notifier - Version 0.9
# Copyright 2007 Aurelio A. Heckert <aurium#gmail-com>
#
# This software draw and updates a icon on the notification
# area, showing a lot of dots representing the machine load.
#
# This is a Free Software relized under the terms of
# the GNU-GPL: http://www.gnu.org/licenses/gpl-3.0.html

# create a temp dir:
dir=$( mktemp -d )
svg=$dir/icon.svg
style="style='fill:#B00; stroke:none'"
# load divisor = ( <load to full> * 1000 ) / <num of dots>
ldiv=$(( ( 5 * 1000 ) / 23 ))
# A 5.0 load average will full the notification dots area.

trap "rm -rf $dir; exit" EXIT INT QUIT TERM

while sleep 4; do
  load=$(
    uptime | grep 'load average:' |
    sed 's/.*load average: \(.*\)$/\1/'
  )
  echo "tooltip:Load Average: $load"
  l1Min=$((  $( echo -n $load | cut -d, -f1 | sed 's/^\s*[0\.]*//; s/\.//' )0 / ldiv ))
  l5Min=$((  $( echo -n $load | cut -d, -f2 | sed 's/^\s*[0\.]*//; s/\.//' )0 / ldiv ))
  l15Min=$(( $( echo -n $load | cut -d, -f3 | sed 's/^\s*[0\.]*//; s/\.//' )0 / ldiv ))
  o=0
  [ $l1Min -lt 4 -a $l5Min -lt 4 -a $l15Min -lt 4 ] && o=$(( 5 - $l1Min ))
  echo "<svg width='200' height='200'>
  <circle cx='100' cy='100' r='80' opacity='0.$o'
          style='fill:none; stroke:#E80; stroke-width:20px' />" > $svg
  for y in 2 3 1 4 0; do
   for x in 3 4 2 5 1; do
    if [ ! \( $x = 1 -a $((y%2)) = 1 \) -a $l15Min -gt 0 ]; then
     echo "<circle cx='$(((40*x)-20-((y%2)*20)))' cy='$(((40*y)+20))' r='17'
       opacity='0.25' $style />" >> $svg
     let l15Min--
    fi
    if [ ! \( $x = 1 -a $((y%2)) = 1 \) -a $l5Min -gt 0 ]; then
     echo "<circle cx='$(((40*x)-20-((y%2)*20)))' cy='$(((40*y)+20))' r='17'
       opacity='0.3' $style />" >> $svg
     let l5Min--
    fi
    if [ ! \( $x = 1 -a $((y%2)) = 1 \) -a $l1Min -gt 0 ]; then
     echo "<circle cx='$(((40*x)-20-((y%2)*20)))' cy='$(((40*y)+20))' r='17'
       opacity='1' $style />" >> $svg
     let l1Min--
    fi
   done
  done
  echo "</svg>" >> $svg
  # Send a icon update command to the zenity notification:
  echo icon:$svg
done| zenity --notification --text="Load Average" --listen