#!/bin/bash

case $1 in
    post)
        declare -a users=($(who | awk '{ print $1 }' | uniq))

        for user in "${users[@]}"
        do
           su $user -c 'pactl set-sink-volume @DEFAULT_SINK@ +1%; sleep 0.1; pactl set-sink-volume @DEFAULT_SINK@ -1%'
        done
    ;;
esac
