Halt computer when a program stops running

[bel3atar]

Hi,
I use JDownloader to get huge files from the internet when I'm afk.
The problem is when I'm too afk the computer is still ON even if the downloads are finished.
Now JDownloader has a functionality that exits the program when all downloads are finished; so I need your help guys to find a way to shutdown the computer once JDownloader is not running anymore.
Thanks...

[Rubberman]

Write a script that monitors JDownloader and switches the system to runlevel 0 (halt) when it terminates.

[bel3atar]

That might be the way. Any idea how to do it?

[atreyu]

assuming the prog is called JDownloader...

#!/bin/bash
pid=$(pidof -x JDownloader)
if [ -n "$pid" ]; then
  echo "JDownloader (pid $pid) still running..."
else
  echo JDownloader is not running
  echo halting
#shutdown -h now
fi

[bel3atar]

assuming the prog is called JDownloader...

#!/bin/bash
pid=$(pidof -x JDownloader)
if [ -n "$pid" ]; then
  echo "JDownloader (pid $pid) still running..."
else
  echo JDownloader is not running
  echo halting
#shutdown -h now
fi

I was expecting a loop or something...
Or is it possible to use cron to run the script every X minutes?

[atreyu]

yeah, cron it or wrap it inside:

while :; do
...
  sleep 1
done