Bash script to check the input string length

fjkum · 06-29-2007, 03:59 AM

Hi,

I would like to restrict user input to only 12 characters on the command line. How can I achive this using bash programming?

Many thanks.

fj

ghostdog74 · 06-29-2007, 04:10 AM

Quote:

Originally Posted by fjkum

Hi,

I would like to restrict user input to only 12 characters on the command line. How can I achive this using bash programming?

Many thanks.

fj

Code:

# string="testing"
# echo ${#string}
7

bigearsbilly · 06-29-2007, 04:26 AM

summink like...

Code:

string=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
while [ ${#string} -ge 12 ];do 
read string;
echo ${#string};done

cfaj · 06-30-2007, 08:43 PM

Quote:

Originally Posted by fjkum

I would like to restrict user input to only 12 characters on the command line. How can I achive this using bash programming?

Code:

read -n12 var