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bashshellsh

Shell Bash: How to prompt a user to select from a dynamically populated list?

newbie here!

On a Shell Script (bash), after prompting user for name/password the script should read from a server.list and generate option for selection.

How do I provide the user the options from server.list like so:

#Please select from the server list:  

1) 10.1.1.xx

2) 10.1.1.xx

3) 10.1.1.xx

Select option [1]:

Any help would be appreciated!

Solution

  • Supposing this source file:

    $ cat server.list 
10.1.1.xx
10.1.2.xx
10.1.3.xx

    Short answer:

    select ip in $(cat server.list); do 
   echo $REPLY $ip
done

    Demo

    $ select ip in $(cat server.list); do echo $REPLY $ip; done
1) 10.1.1.xx
2) 10.1.2.xx
3) 10.1.3.xx
#? 1
1 10.1.1.xx
#? 2
2 10.1.2.xx

    You will have to implement a case loop to do something useful with the ip variable.

    Example

    select ip in $(cat server.list) exit; do 
   case $ip in
      exit) echo "exiting"
            break ;;
         *) echo ip $ip;
   esac
done