Using TPUT command to change cursor position in a Shell Script,Linux Teacher Sourav,Kolkata 09748184075

#!/bin/sh
# 21/05/2018
# script4
# Subroutines Example
export LINES=$LINES
export COLUMNS=$COLUMNS
#echo $LINES
cls()
{
tput clear
return 0
}
home()
{
tput cup 0 0
return 0
}

bold()
{
tput smso
# no newline or else will scroll
}
unbold()
{
tput rmso
}
underline()
{
tput smul
}
normalline()
{
tput rmul
}
end()
{
#x="${COLUMNS}"-1
let x=$COLUMNS-1

let y=$LINES
#echo x is $x
#echo y is $y
tput cup $y $x
echo -n ""
}
# Code starts here
rc=0
# return code
if [ $# -ne 1 ] ; then
echo "Usage: script4 parameter"
echo "Where parameter can be: "
echo " home - put an X at the home position"
echo " cls - clear the terminal screen"
echo " end - put an X at the last screen position"
echo " bold - bold the following output"
echo " underline - underline the following output"
exit 255
fi
parm=$1
# main parameter 1
if [ "$parm" = "home" ] ; then
echo "Calling subroutine home."
home
echo -n "X"
elif [ "$parm" = "cls" ] ; then
cls
elif [ "$parm" = "end" ] ; then
echo "Calling subroutine end."
end
elif [ "$parm" = "bold" ] ; then
echo "Calling subroutine bold."
bold
echo "After calling subroutine bold."
unbold
echo "After calling subroutine unbold."
elif [ "$parm" = "underline" ] ; then
echo "Calling subroutine underline."
underline
echo "After subroutine underline."
normalline
echo "After subroutine normalline."
else
echo "Unknown parameter: $parm"
rc=1
fi
exit $rc