Simple script with progress bar

I have script for doing some thing which I put in dobackup() function:

Code:

#!/bin/bash

function progress(){
  echo -ne "Please wait\n"
  while true
  do
    echo -n "#"
    sleep 3
  done
}

function dobackup()
{
    tar -cvf dupatest.tar dupatest >/dev/null 2>&1
}

# Start it in the background
progress &

# Save progress() PID
# You need to use the PID to kill the function
MYSELF=$!

# Start backup
# Transfer control to dobackup()
dobackup

# Kill progress
kill $MYSELF > /dev/null 2>&1

echo -n "done"

Problem is that in line --> kill $MYSELF > /dev/null 2>&1. Not working part with redirection to /dev/null, because I got in console, for example:

Code:

/plik: line 32: 110509 Terminated              progress

There shouldn't be anything.

 

Code:

#!/bin/bash

#Script for removing trashes after deinstalled old kernels by apt-get autoremove

function progressBar()
{
    echo -ne "Please wait\n"
    while true
    do
        echo -n "#"
        sleep 2
    done
}


function clearOldKernel()
{
    x=$(dpkg --list | grep -i linux-image | grep ^rc | awk '{print $2}')

    #if [ ${#x[@]} -gt 0 ]
    if [ -z "$x" ]
    then
        echo "Your system has not any old kernels to deletion."
    else
        echo "Below is the list of old kernels:"
        echo " "
        echo "$x"
        echo " "
        for plik in $x
        do
            echo "Do you want remove $plik? (answer <yes> or hit enter if not sure)"
            read answer
            if [ "$answer" = "yes" ]
            then
                echo "Deleting file $plik":
                apt-get --purge remove $plik
                echo -e "$plik deleted \n"
            else
                echo "You wasn't sure you want remove old kernels."
                exit 1
            fi
        done
    fi
    echo
    echo "-------------------------------------------------------------- "
    echo "I have done my job, cya later."
}

#Start in background
progressBar &


#Save PID progressBar to variable
MYSELF=$!

#call clearing function
clearOldKernel

#kill progressBar function
kill $MYSELF > /dev/null 2>&1

It clears like it should but I have a problem with progress bar. I would like to show progress bar only when file is deleting. Currently when script asks about some action, user sees started showing signs '#'. Moreover I think that progressBar function is killed, because use "jobs" command does not show any background task.

 

function Progress_bar(container){
this.state = 0,
this.max = 100,
this.bar = $("#"+container+" .bar"),
this.container = $("#"+container),
this.start = function(max){
this.max = max*1.0;
this.container.slideDown();
this.bar.css("width","0%");
}
this.increase = function(tick){
this.state += tick*1.0;
curr = this.state / this.max;
this.bar.css("width",curr*100+"%");
}
this.finish = function(){
this.state=0;
this.max = 100;
this.container.slideUp();
}
}