bash script, empty (enter button pushing only) value catching

junust · 12-25-2008, 03:48 AM

Hi All

Have to catch "enter button pushing only" value

i.e

#!/bin/bash
read something

So if to push enter button whithout any parrameter on this script, what is retun value of "$something" is?

seems to be not the same empty value like " " parameter i.e
$something == " " dos't work

I have to chech in this script, when user just push "enter button" whiout any parameter in READ command execution

Thx

jcookeman · 12-25-2008, 04:06 AM

Code:

#!/usr/bin/env bash

read -p "Enter something: " SOMETHING

if [ "$SOMETHING" == '' ]
then
    echo "\$SOMETHING is empty"
else
    echo $SOMETHING
fi

junust · 12-25-2008, 04:18 AM

work like a charm !!!

Did't know about ' ' empty expression

Thanks!