shell编程实例六

#!/bin/sh

 tput1()
{
 line=`tput lines`
 cols=`tput cols`

 tput clear

 tput cup 0 0
 echo "left-top\c"

 tput cup 0 `expr $cols - 9`
 echo "right-top\c"

 tput cup $line 0
 echo "left-bottom\c"

 tput cup $line `expr $cols - 12`
 echo "right-bottom\c"

 cline=`expr $line / 2`
 ccols=`expr $cols / 2`
 tput cup  $cline $ccols

}

while true
do
 tput1
 sleep 0.5
done