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I am writing a bash script that, amongst other things, installs some software. One of the installers I run requires answering some questions. For example:

Is the default install folder ok (yes/no)?
What is the email address you would like to use?

The installer does not provide an option to script responses. Is there a way to identify these prompts when running the installer from a bash script, and automatically providing a response? For example:

Is the default install folder ok (yes/no)? yes
What is the email address you would like to use? my@address.com
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migrated from stackoverflow.com Jun 11 '12 at 7:34

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3 Answers 3

up vote 3 down vote accepted

You want the tool called expect.

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In some cases, you can use yes.

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Did you try using a cast statement, like this?

#!/bin/bash

echo -n "Do you agree with this? [yes or no]: "
read yno
case $yno in

        [yY] | [yY][Ee][Ss] )
                echo "Agreed"
                ;;

        [nN] | [n|N][O|o] )
                echo "Not agreed, you can't proceed the installation";
                exit 1
                ;;
        *) echo "Invalid input"
            ;;
esac

$ ./yorno.sh
Do you agree with this? [yes or no]: YES
Agreed
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