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Full Discussion: Bash Script verify user input is not empty and is equal to a value
Top Forums Shell Programming and Scripting Bash Script verify user input is not empty and is equal to a value Post 302389995 by spartiati on Tuesday 26th of January 2010 02:49:59 PM
Old 01-26-2010
Bash Script verify user input is not empty and is equal to a value
I need to create a script that has a user enter a value. I want to verify that the value is either 1,2, or 3. If it is not then I want them to try entering it again. I am using a while loop to force them to retry.

I am able to test the input against 1,2, and 3, but when I test agains an empty variable, I get an error (expected unary). Below is what I have so far:

Code:
echo
echo "Which item?"
echo "1) choice 1"
echo "2) choice 2"
echo "3) choice 3"
echo
echo "Enter Choice:"
read -e INPUT
echo
while [ $INPUT != 1 ] && [ $INPUT != 2 ] && [ $INPUT != 3 ] && [ $COUNTER -lt 5 ] || [ -z $INPUT ]; do
        clear
        echo
        echo "You did not enter an appropriate choice.  Please enter 1, 2, or 3."
        echo "1) choice 1"
        echo "2) choice 2"
        echo "3) choice 3"
        echo
        echo "Enter Choice:"
        read -e INPUT
        echo
        let COUNTER++
        echo "Counter =$COUNTER"
done
# PROVIDER VARIABLES
case $INPUT in
1)
        PROV_POOL="choice1";;
2)
        PROV_POOL="choice 2";;
3)
        PROV_POOL="choice 3";;
*)
        STATUS=1
esac
if [ $STATUS == 0 ]
then
        echo "You entered a good value"
else
        echo "You have exceeded the error retry count."
fi

Last edited by pludi; 01-26-2010 at 03:55 PM.. Reason: code tags, please...
 

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LEARN ABOUT CENTOS

amanda-scripts

AMANDA-SCRIPTS(7)						    Miscellanea 						 AMANDA-SCRIPTS(7)

NAME

       amanda-scripts - Configuring and using the Script API

DESCRIPTION

       The Script API is a flexible system for invoking user-supplied scripts at various points in the execution of Amanda. This manual page
       describes the operation and configuration of the API. For help writing Script API scripts, see http://wiki.zmanda.com/index.php/Script_API.

SCRIPTS

       This section lists the scripts included with Amanda, see the individual man page for instructions on using them. For complete How-To
       information, consult the Amanda wiki at http://wiki.zmanda.com.

       o   amzfs-snapshot(8), - create/destroy zfs snapshot.

       o   script-email(8), - send email.

       Script properties work just like application properties: they are insensitive to case, and - (dash) and _ (underscore) may be used
       interchangeably.

SCRIPTS OUTPUT PROPERTY

       A pre-dle-amcheck, pre-dle-estimate or pre-dle-backup executed on the client can output property on stdout that are sent to the
       application. If the output line matches "PROPERTY str1 str2", Amanda sets a property called "str1" by the value of "str2", that property is
       sent to the application.

SEE ALSO

       amanda(8), amanda.conf(5)

       The Amanda Wiki: : http://wiki.zmanda.com/

AUTHORS

       Jean-Louis Martineau <martineau@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

       Dustin J. Mitchell <dustin@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

Amanda 3.3.3							    01/10/2013							 AMANDA-SCRIPTS(7)
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