Question

I need advice – how to print the same last value in ksh scripts without to print param argument

so what we can do in ksh inorder to print the last value ?

example – I need to print the last value ( in this case -$ETH_PORT ) , without to define $ETH_PORT parameter after the second echo command

how to print the last value from the last echo/print command?

 function test


 {

  ETH_PORT=eth0
  echo $ETH_PORT

     # now I need to print the last value ( in this case value from $ETH_PORT param )


  echo < what need to write in order to print last value >

   }


 test

expected output after runing the test function

   eth0

   eth0 

Answer 1

You could subvert echo with a function that kept track of the last thing echo’ed, but that wouldn’t capture the last thing to go to stdout:

#!/bin/bash

function echo {
    /bin/echo $*
    last_echoed="$*"
}

function testit {
    ETH_PORT=eth0
    echo "this is not echo'ed twice"
    echo $ETH_PORT
    echo $last_echoed
}

testit

A second option is to use a wrapper script that keeps track of what the last line was and then print it at the end.