Linux and Unix Shell Programming

22.4. Viewing records

The user can either view all records or just a particular record. If the user wants to see all records then a simple cat and awk statement does it. If the records contain many fields then a more user-friendly output would be required, but this will suffice for our needs.

						if [ "$STR" = "all" ]; then 
  echo "Surname Name Employee Code" 
  echo "_______________________________" 
  cat $DBFILE |awk -F: '{print $2"\t"$3"\t\t"$1}' | more 
  return 0 
fi
					

The code to display a single record has already been covered in deletion and amendments. One slight change is the ability to print a record when the user chooses this option. Here’s the piece of code that sends a record to the printer:

						pr <<- MAYDAY RECORD No : $REC EMPLOYEE NUMBER : $CODE ...