How do I find the width & height of a terminal window?

Question

As a simple example, I want to write a CLI script which can print = across the entire width of the terminal window.

#!/usr/bin/env php <?php echo str_repeat('=', ???); 

or

#!/usr/bin/env python print '=' * ??? 

or

#!/usr/bin/env bash x=0 while [ $x -lt ??? ]; do echo -n '='; let x=$x+1 done; echo 

Answer 1

• tput cols tells you the number of columns.
• tput lines tells you the number of rows.

Answer 2

In bash, the $LINES and $COLUMNS environmental variables should be able to do the trick. The will be set automatically upon any change in the terminal size. (i.e. the SIGWINCH signal)