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I am detecting IP assigned by dhclient and trying to show it using notify-send. I have made a script and placed it in /etc/dhcp/dhclient-exit-hooks.d. Content of the script is as below

#!/bin/bash
whoami >>/tmp/vari.txt
echo "========================>" >> /tmp/vari.txt
printenv >> /tmp/vari.txt
echo "========================>" >> /tmp/vari.txt
set >> /tmp/vari.txt
notify-send "hey"
MAINUSER=`cat /etc/passwd|grep 1000|sed "s/:.*$//g"`
su $MAINUSER -c $"notify-send \"IP assigned\""

I have saved it with name test and have given executable permission and root as owner. All the parts of the scripts are working except for notify-send. One thing I checked is keeping filename as test.sh and notify-send works from command line but dispatcher service doesn't execute it.

Can someone suggest a solution?

Aman Turate
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    Try to put something like export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus before the su line. – FedKad Sep 21 '20 at 09:08
  • thanks @FedonKadifeli but no luck. from command line notify-send runs but not via dhclient dispatch service. – Aman Turate Sep 21 '20 at 12:30
  • Is the user with id 1000 logged in to a GUI session by the time the script runs? There was a similar (not identical to yours) discussion here: https://askubuntu.com/questions/298608/ – FedKad Sep 21 '20 at 12:44
  • @Fedonkadifeli MAINUSER variable in my script fetches the user with id 1000 and showing correct user not root. Will go through the link that you have provided – Aman Turate Sep 22 '20 at 05:39

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