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Saving args to a variable like that is going to break down if any of your filenames have spaces or the like.

Just do a little more checking in your input loop:

#!/bin/bash

die() {
...

Please issue an :
echo $LIB_HOME
as well as an :
env | grep LIB_HOME
before running the while statement (this to make sure that the $LIB_HOME variable have a relevant value and exists in your...

Depends on what you mean by similar ...
Consider the following:

zsh-4.3.14[t]% printf '\t 42\t \t \n'
42
zsh-4.3.14[t]% printf '\t 42\t \t \n' | awk '{ print length }'
8...

Useless Use of Cat (http://partmaps.org/era/unix/award.html), this is suffice:

while read first second third rest; do ## Reads each line into separate variables
if [ "$third" == "27" ]; then ...

You spend lots of time looping round and demanding in cut again & again. Each time, you start a new process so the system spends effort there. The awk answer is probably the way to go if you are...

Try this:
awk '$3==27{print $2}' file

Is "ls" and alias ?
Try the full path /usr/bin/ls .

Looks odd to me too - did you check it on another (similar) box?