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Old 12-25-2008, 04:48 AM   #1
junust
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Registered: Jul 2008
Location: Israel Ramat Gan
Distribution: CentOs 5.3, SuSe 11.1, Solaris 9, Slackware 13
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bash script, empty (enter button pushing only) value catching


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

Last edited by junust; 12-25-2008 at 04:49 AM.
 
Old 12-25-2008, 05:06 AM   #2
jcookeman
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Registered: Jul 2003
Location: London, UK
Distribution: FreeBSD, OpenSuse, Ubuntu, RHEL
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Code:
#!/usr/bin/env bash

read -p "Enter something: " SOMETHING

if [ "$SOMETHING" == '' ]
then
    echo "\$SOMETHING is empty"
else
    echo $SOMETHING
fi
 
Old 12-25-2008, 05:18 AM   #3
junust
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Registered: Jul 2008
Location: Israel Ramat Gan
Distribution: CentOs 5.3, SuSe 11.1, Solaris 9, Slackware 13
Posts: 78

Original Poster
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work like a charm !!!

Did't know about ' ' empty expression


Thanks!
 
  


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