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csegau

06-24-2010 07:11 AM

take esc key as input

hi,

I have to take "esc" key as input without hitting enter key

I am doing like this
read -s -n1 variable

Now,i have to use this value $variable to jump to particular case
in "switch"(case) construct.

i am unable to do it

case $key in
pattern) echo "escape key is pressed";;
esac

what should be pattern? here.

thanks in advance

David the H.

06-24-2010 07:59 AM

You can enter a literal escape character with the sequence $'\e'.

Code:

#!/bin/bash

echo "Please hit escape:"

read -s -n1 variable



case $variable in



    $'\e') echo "escape key pressed" ;;



    *) echo "that's not it" ;;



esac

The bash man page section on quoting explains it in more detail.

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