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Full Discussion: command su : enter directly
Operating Systems HP-UX command su : enter directly Post 302277822 by pludi on Sunday 18th of January 2009 09:26:51 AM
Old 01-18-2009
Normally, password reading programs reset their STDIN filehandle in order to ensure input from a terminal. This has the advantage of preventing local brute force attacks at passwords.
An alternative is to install sudo (HP has precompiled binaries for 10.x and 11.x), and setup /etc/sudoers that the required program may be run by a certain user without a need for a password.
Another way might be to use expect to automatically input the password to su, but I advise against it, since saving passwords in clear text is always a bad idea.
 

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LEARN ABOUT POSIX

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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