waitpid and grandchildren Post: 302643215

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Top Forums Programming waitpid and grandchildren Post 302643215 by kshots on Friday 18th of May 2012 04:25:48 PM

05-18-2012

Registered User

Hmm... actually, I just found that a solution should present itself in the 3.4 kernel, when it comes out. I can't post a URL with where I got this from (because apparently I need 5 posts for that), but here's a quote from the API changes page:

Quote:

The PR_SET_CHILD_SUBREAPER prctl() operation allows a "service manager" process to mark itself as a sort of 'sub-init', able to stay as the parent for all orphaned processes created by the started services. All SIGCHLD signals will be delivered to the service manager. There is a corresponding PR_GET_CHILD_SUBREAPER prctl() operation. Planned users of this feature include D-Bus and systemd.

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LEARN ABOUT ULTRIX

systemd-logind.service

SYSTEMD-LOGIND.SERVICE(8)				      systemd-logind.service					 SYSTEMD-LOGIND.SERVICE(8)

NAME

       systemd-logind.service, systemd-logind - Login manager

SYNOPSIS

       systemd-logind.service

       /lib/systemd/systemd-logind

DESCRIPTION

       systemd-logind is a system service that manages user logins. It is responsible for:

       o   Keeping track of users and sessions, their processes and their idle state. This is implemented by allocating a systemd slice unit for
	   each user below user.slice, and a scope unit below it for each concurrent session of a user. Also, a per-user service manager is
	   started as system service instance of user@.service for each logged in user.

       o   Generating and managing session IDs. If auditing is available and an audit session ID is already set for a session, then this ID is
	   reused as the session ID. Otherwise, an independent session counter is used.

       o   Providing PolicyKit-based access for users for operations such as system shutdown or sleep

       o   Implementing a shutdown/sleep inhibition logic for applications

       o   Handling of power/sleep hardware keys

       o   Multi-seat management

       o   Session switch management

       o   Device access management for users

       o   Automatic spawning of text logins (gettys) on virtual console activation and user runtime directory management

       User sessions are registered with logind via the pam_systemd(8) PAM module.

       See logind.conf(5) for information about the configuration of this service.

       See sd-login(3) for information about the basic concepts of logind such as users, sessions and seats.

       See the logind D-Bus API Documentation[1] for information about the APIs systemd-logind provides.

       For more information on the inhibition logic see the Inhibitor Lock Developer Documentation[2].

SEE ALSO

       systemd(1), systemd-user-sessions.service(8), loginctl(1), logind.conf(5), pam_systemd(8) sd-login(3)

NOTES

	1. logind D-Bus API Documentation
	   https://www.freedesktop.org/wiki/Software/systemd/logind

	2. Inhibitor Lock Developer Documentation
	   https://www.freedesktop.org/wiki/Software/systemd/inhibit

systemd 237														 SYSTEMD-LOGIND.SERVICE(8)