SYSTEMD-LOGIND.SERVICE(8) systemd-logind.service SYSTEMD-LOGIND.SERVICE(8)
NAME
systemd-logind.service, systemd-logind - Login manager
SYNOPSIS
systemd-logind.service
/usr/lib/systemd/systemd-logind
DESCRIPTION
systemd-logind is a system service that manages user logins. It is
responsible for:
• 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.
• 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.
• Providing polkit[1]-based access for users for operations such as
system shutdown or sleep
• Implementing a shutdown/sleep inhibition logic for applications
• Handling of power/sleep hardware keys
• Multi-seat management
• Session switch management
• Device access management for users
• Automatic spawning of text logins (gettys) on virtual console
activation and user runtime directory management
• Scheduled shutdown
• Sending "wall" messages
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 org.freedesktop.login1(5) and org.freedesktop.LogControl1(5) for
information about the D-Bus APIs systemd-logind provides.
For more information see Inhibitor Locks[2].
If you are interested in writing a display manager that makes use of
logind, please have look at Writing Display Managers[3]. If you are
interested in writing a desktop environment that makes use of logind,
please have look at Writing Desktop Environments[4].
SEE ALSO
systemd(1), systemd-user-sessions.service(8), loginctl(1),
logind.conf(5), pam_systemd(8), sd-login(3), org.freedesktop.login1(5)
NOTES
1. polkit
https://www.freedesktop.org/wiki/Software/polkit
2. Inhibitor Locks
https://systemd.io/INHIBITOR_LOCKS
3. Writing Display Managers
https://systemd.io/WRITING_DISPLAY_MANAGERS
4. Writing Desktop Environments
https://systemd.io/WRITING_DESKTOP_ENVIRONMENTS
systemd 257.9 SYSTEMD-LOGIND.SERVICE(8)
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