Как изменить заголовок & ldquo; Login & rdquo; кнопка?

Я действительно не могу писать сценарий, но я модифицировал сценарий hakermania для создания другого.

Этот будет увеличивать или уменьшать объем конкретного приложения с шагом 5%:

edit: на самом деле, он работает в постоянно меняющемся последнем открывшемся приложении. Идеи?

#!/bin/bash
# Script to increase or decrease an individual application's volume using PulseAudio, depending solely on
# process name, based on another script by hakermania, constructed as answer on askubuntu.com: 
# http://askubuntu.com/questions/180612/script-to-mute-an-application

# It works as: change_app_volume.sh vlc increase OR change_app_volume.sh vlc decrease
# Set desired increments in lines #66 and #68

if [ -z "$1" ]; then
   echo "Please provide me with an application name"
   exit 1
fi

if [ -z "$2" ]; then
   echo "Please provide me with an action increase/decrease after the application name"
   exit 1
fi

if ! [[ "$2" == "increase" || "$2" == "decrease" ]]; then
   echo "The 2nd argument must be increase/decrease"
   exit 1
fi

process_id=$(pidof "$1")

if [ $? -ne 0 ]; then
   echo "There is no such process as "$1""
   exit 1
fi

temp=$(mktemp)

pacmd list-sink-inputs > $temp

inputs_found=0;
current_index=-1;

while read line; do
   if [ $inputs_found -eq 0 ]; then
      inputs=$(echo -ne "$line" | awk '{print $2}')
      if [[ "$inputs" == "to" ]]; then
         continue
      fi
      inputs_found=1
   else
      if [[ "${line:0:6}" == "index:" ]]; then
         current_index="${line:7}"
      elif [[ "${line:0:25}" == "application.process.id = " ]]; then
         if [[ "${line:25}" == "\"$process_id\"" ]]; then
            #index found...
            break;
         fi
      fi
   fi
done < $temp

rm -f $temp

if [ $current_index -eq -1 ]; then
   echo "Could not find "$1" in the processes that output sound."
   exit 1
fi

#increase/decrease...
if [[ "$2" == "increase" ]]; then
   pactl set-sink-input-volume "$current_index" +5% > /dev/null 2>&1
else
   pactl set-sink-input-volume "$current_index" -5% > /dev/null 2>&1
fi

exit 0