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Full Discussion: Reading password from /dev/tty
Top Forums UNIX for Dummies Questions & Answers Reading password from /dev/tty Post 302594128 by Corona688 on Monday 30th of January 2012 01:59:28 PM
Old 01-30-2012
Why do you want to?

How to do so can vary from system to system, and even the manner the password is stored in can vary. You need root access to do so anyway, which makes it fairly useless unless you've got control of the machine anyway. Extracting a password from memory is like trying to read a hard drive with an electron microscope; might be technically possible, but an exercise in frustration, and used only in desperate (or fraudulent) circumstances.
 

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LEARN ABOUT MOJAVE

systemd-ask-password-console.service

SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)                systemd-ask-password-console.service                SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)

NAME

       systemd-ask-password-console.service, systemd-ask-password-console.path, systemd-ask-password-wall.service, systemd-ask-password-wall.path
       - Query the user for system passwords on the console and via wall

SYNOPSIS

       systemd-ask-password-console.service

       systemd-ask-password-console.path

       systemd-ask-password-wall.service

       systemd-ask-password-wall.path

DESCRIPTION

       systemd-ask-password-console.service is a system service that queries the user for system passwords (such as hard disk encryption keys and
       SSL certificate passphrases) on the console. It is intended to be used during boot to ensure proper handling of passwords necessary for
       boot.  systemd-ask-password-wall.service is a system service that informs all logged in users for system passwords via wall(1). It is
       intended to be used after boot to ensure that users are properly notified.

       See the developer documentation[1] for more information about the system password logic.

       Note that these services invoke systemd-tty-ask-password-agent(1) with either the --watch --console or --watch --wall command line
       parameters.

SEE ALSO

       systemd(1), systemd-tty-ask-password-agent(1), wall(1)

NOTES

        1. developer documentation
           https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

systemd 237                                                                                                SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)
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