Progress indicator

Here is another cursor movement script that also calculates the low and high of the $RANDOM Bash variable. It might not look all that cool to everyone but it does show some more of the concepts we have covered in this book. I was also somewhat curious as to what the range of that random number generator was.

Chapter 10 - Script 1

#!/bin/sh
#
# 6/11/2017
# Chapter 10 - Script 1
#

# Subroutines
trap catchCtrlC INT          # Initialize the trap

# Subroutines
catchCtrlC()
{
 loop=0                      # end the loop
}

cls()
{
 tput clear
}

movestr()                    # move cursor to row, col, display string
{
 tput cup $1 $2
 echo -n "$3"
}

# Code
if [ "$1" = "--help" ] ; then
 echo "Usage: script1 or script1 --help "
 echo " Shows the low and high count of the Bash RANDOM variable."
 echo " Press Ctrl-C to end."
 exit 255
fi

sym[0]='|'
sym[1]='/'
sym[2]='-'
sym[3]='\'

low=99999999
high=-1

cls
echo "Chapter 10 - Script 1"
echo "Calculating RANDOM low and high .....