How can I make my Ubuntu 12.04 auto-shutdown when battery is fully charged?

Question

I would love if someone could give me a script or something like that to make it do what I describe in the title...

Answer 1

Here is a small python program which uses terminal to look into file for battery status and handles the operation with defined function. This will work for general case, but though, there might be a little problem. It uses the package "acpi" which monitors the battery status. The program is:

import commands
import pynotify
from threading import Timer


def battery_check():

    rem = float(commands.getoutput("grep \"^remaining capacity\" /proc/acpi/battery/BAT0/state | awk '{ print $3 }'"))
    full = float(commands.getoutput("grep \"^last full capacity\" /proc/acpi/battery/BAT0/info | awk '{ print $4 }'"))
    state = commands.getoutput("grep \"^charging state\" /proc/acpi/battery/BAT0/state | awk '{ print $3 }'")

    percentage = int((rem/full) * 100)

    if percentage == 100:
        pynotify.init("Battery Full! Now shutting down")
        os.system("sudo shutdown now -h -k") //shutdown command issued

    timer = Timer(300.0,battery_check)
    timer.start()

if __name__ == "__main__": battery_check()