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


        

Answer 1

There are some cases where your rows/LINES and columns do not match the actual size of the "terminal" being used. Perhaps you may not have a "tput" or "stty" available.

Here is a bash function you can use to visually check the size. This will work up to 140 columns x 80 rows. You can adjust the maximums as needed.

function term_size
{
    local i=0 digits='' tens_fmt='' tens_args=()
    for i in {80..8}
    do
        echo $i $(( i - 2 ))
    done
    echo "If columns below wrap, LINES is first number in highest line above,"
    echo "If truncated, LINES is second number."
    for i in {1..14}
    do
        digits="${digits}1234567890"
        tens_fmt="${tens_fmt}%10d"
        tens_args=("${tens_args[@]}" $i)
    done
    printf "$tens_fmt\n" "${tens_args[@]}"
    echo "$digits"
}