update_gui.sh

#This program is free software; you can redistribute it and/or
#modify it under the terms of the GNU General Public License
#as published by the Free Software Foundation; either version 2
#of the License, or (at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

#!/bin/bash

# Start apt-get update and pipe output to /tmp.
apt-get update >> /tmp/aptgetupdate.log &
# Keep checking if the process is running. And keep a count.
{
        i="0"
        while (true)
        do
            proc=$(ps aux | grep -v grep | grep -e "apt-get update")
            if [[ "$proc" == "" ]]; then break; fi
            # Sleep for a longer period if the connection is slow
            sleep 1
            echo $i
            i=$(expr $i + 1)
        done
        # If it is done then display 100%
        echo 100
        # Give it some time to display the progress to the user.
        sleep 2
} | whiptail --title "Synchronising Package Databases" --gauge "Please wait..." 8 78 0

# Start apt-get upgrade and pipe output to /tmp.
apt-get upgrade -y >> /tmp/aptgetupgrade.log &
# Keep checking if the process is running. And keep a count.
{
        i="0"
        while (true)
        do
            proc=$(ps aux | grep -v grep | grep -e "apt-get upgrade")
            if [[ "$proc" == "" ]]; then break; fi
            # Sleep for a longer period if the connection is slow
            sleep 1
            echo $i
            i=$(expr $i + 1)
        done
        # If it is done then display 100%
        echo 100
        # Give it some time to display the progress to the user.
        sleep 2
} | whiptail --title "Updating system" --gauge "Please wait..." 8 78 0