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Full Discussion: Need help implementing a timout in my Shell Script for RHEL6
Top Forums Shell Programming and Scripting Need help implementing a timout in my Shell Script for RHEL6 Post 302911156 by DGPickett on Wednesday 30th of July 2014 11:51:43 AM
Old 07-30-2014
You can have subshells that watch each other, so if the query loop has not written a new output to the output file for N seconds, another looping watcher can decide it is hung and kill and restart it. A third looping watcher-publisher can declare it down until there is a fresh 'up', and vice versa, and publish the status and status changes.
 

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LEARN ABOUT ULTRIX

systemd-tty-ask-password-agent

SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)			  systemd-tty-ask-password-agent			 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)

NAME

       systemd-tty-ask-password-agent - List or process pending systemd password requests

SYNOPSIS

       systemd-tty-ask-password-agent [OPTIONS...] [VARIABLE=VALUE...]

DESCRIPTION

       systemd-tty-ask-password-agent is a password agent that handles password requests of the system, for example for hard disk encryption
       passwords or SSL certificate passwords that need to be queried at boot-time or during runtime.

       systemd-tty-ask-password-agent implements the Password Agents Specification[1], and is one of many possible response agents which answer to
       queries formulated with systemd-ask-password(1).

OPTIONS

       The following options are understood:

       --list
	   Lists all currently pending system password requests.

       --query
	   Process all currently pending system password requests by querying the user on the calling TTY.

       --watch
	   Continuously process password requests.

       --wall
	   Forward password requests to wall(1) instead of querying the user on the calling TTY.

       --plymouth
	   Ask question with plymouth(8) instead of querying the user on the calling TTY.

       --console
	   Ask question on /dev/console instead of querying the user on the calling TTY.

       -h, --help
	   Print a short help text and exit.

       --version
	   Print a short version string and exit.

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO

       systemd(1), systemctl(1), systemd-ask-password-console.service(8), wall(1), plymouth(8)

NOTES

	1. Password Agents Specification
	   https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

systemd 237													 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)
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