Shell Programming and Scripting

#!/bin/ksh
##########################################
#Directories
eagle_dir=/test
#Imp Files
FILENAME=/test/files.txt
usage(){
        print process_test.sh - script to process test data
        print "Usage: process_test.sh"

print is non-standard and doesn't offer anything over standard commands.

If you use only standard commands, you can easily move your script to another shell if there's some feature you need that's not in ksh,

Code:

 printf "%s\n" "process_test.sh - script to process test data"
 printf "%s\n" "Usage: process_test.sh"

        }
cat $FILENAME | while read LINE

There's no need for cat:

Code:

while IFS= read -r LINE
do
  : ....
done < "$FILENAME"

do
  ls -r1 "$test"/"$LINE"_????????_??????_??????.txt|sort -t2 +1 -r|head -1|while read obj

Why all those quotation marks?

Code:

  ls -r1 "$test/$LINE"_????????_??????_??????.txt |

  do
    echo "Inside DO $LINE loop"
    echo  $obj
  done
done
# end script