How do I read only the bss from size

Question

I want to be able to add numbers under data and bss section out of the size information of a file in command line

./script.sh [file name]

So far I wrote my script as :

ExcPath=$1 #read file name from command line
Numberone= size $1 | $data #put data column into Numberone
Numbertwo= size $1 | $bss #put bss column into Numbertwo
sum=$(( $Numberone + $Numbertwo )) # calculate the sum of DATA and BSS
echo $sum 

$data and $bss are variables that I assumed that it is how shell reads from column "data" and "bss"

output from size test :

text   data    bss    dec    hexfile name
2231    600      8   2839      b17   test

Expected output after running my script:

608

How could I achieve this in Shell Script? What did I do wrong?

Answer 1

I suggest to use awk for this job:

#!/bin/bash

size "$1" | awk 'NR==2{print $2+$3}' # in row 2 sum column 2 and 3