Cron job shut down the system ignoring the specified time

heathcliffz · 12-08-2015, 01:10 PM

hi guys,

I made a script that asks the user if he wants to shut down the computer in 10 minutes or wait another hour and I scheduled in cron to run each hour from 18h to 7 am. However it happened two problems:
1 - The box that asks the question does not appear
2 - It does not turn off in 10 minutes but at the time that runs the script as if I had used the now option

ideas?

The Script:

Code:

#!/bin/bash
date=`date`
usuario=`who | sed q | awk -F" " '{print $1}'`
export XAUTHORITY=/home/$usuario/.Xauthority
if zenity --question --text="Seu micro ser desligado em 10 minutos. Tudo bem?" --title="Desligar?" --ok-label="Prorrogar" --cancel-label="Pode Desligar" --timeout=300; then
  echo "NAO DESLIGOU "$date >> /tmp/testes_desligar;
else
  echo "DESLIGOU "$date >> /tmp/testes_desligar;
  /sbin/shutdown -h +10; #already tried shutdown -h 10 but same thing happens...
fi

The CRON job (on /etc/crontab):

Code:

48 0-7,16-23 * * * root /home/myuser/shell/desliga.sh

rknichols · 12-08-2015, 01:28 PM

The cron job has no DISPLAY variable set in the environment, so the zenity process always fails. There should have been a "(zenity:nnnn): Gtk-WARNING **: cannot open display:" message written to stderr and sent to you in email.

heathcliffz · 12-08-2015, 02:32 PM

If zenity will not work in this case, how can I make a warning to the user?

michaelk · 12-08-2015, 02:42 PM

Try adding the following to the beginning of your script:
export DISPLAY=":0.0"