elogind

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elogind — сервис logind проекта systemd, выделенный в отдельный пакет. Он предназначен для пользователей, которые предпочитают использовать систему инициализации, отличную от systemd, но при этом хотят использовать популярные приложения типа KDE или GNOME, которые в ином случае жёстко зависели бы от systemd.

Установка

Ядро

Рекомендуется установить следующие параметры ядра:

ЯДРО

General setup  --->
    [*] Control Group support  --->
File systems  --->
    [*] Inotify support for userspace

In the unlikely (and not recommended) event that standard kernel features are enabled for manual configuration, elogind also requires eventpoll, signalfd() and timerfd() support. Most users can ignore this.

USE-флаги

USE flags for sys-auth/elogind The systemd project's logind, extracted to a standalone package

+acl	Add support for Access Control Lists
+cgroup-hybrid	Use hybrid cgroup hierarchy instead of unified (OpenRC's default).
+pam	Add support for PAM (Pluggable Authentication Modules) - DANGEROUS to arbitrarily flip
+policykit	Enable PolicyKit (polkit) authentication support
audit	Enable support for Linux audit subsystem using sys-process/audit
debug	Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
doc	Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
selinux	!!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur
test	Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)

Data provided by the Gentoo Package Database · Last update: 2024-09-21 13:10 More information about USE flags

There is a global elogind USE flag for enabling elogind support in other packages. It's also recommended to disable support for other session trackers (systemd) to avoid conflicts:

ФАЙЛ /etc/portage/make.conf

USE="elogind -systemd"

Предупреждение
Одновременное использование elogind и systemd не протестировано и не рекомендуется!

Установка

После настройки USE-флагов обновите систему, чтобы изменения вступили в силу:

root #emerge --ask --changed-use --deep @world

Настройка

Сервис

elogind должен запускаться с уровня запуска boot:

root #rc-update add elogind boot

Если D-Bus был установлен с USE="elogind", запуск elogind при старте системы также автоматически вызовет загрузку системного демона dbus.

Alternatively, elogind can be launched on-demand by the first program that requests it (like a compatible display manager), through the system dbus service.

Предупреждение
If there are problems getting poweroff/reboot/suspend etc. working from desktop environment, putting elogind into boot runlevel will make sure the elogind-daemon is started properly before any user is logged in, and so should fix the problem.

Additionally, if built with the pam USE flag, elogind will be activated when the first user logs into the system.

Предупреждение
In order to trigger elogind to activate a session on first on a VT console terminal, sys-apps/shadow has to be built with the pam USE flag also, since it provides /bin/login. This concept also applies to any other graphical login managers or alternative terminal login programs used. In that case, they should be built with PAM too.

startx D-Bus integration

To have an elogind session created when using startx to start the X server (instead of a display manager), add the following to the user's ~/.xinitrc file:

ФАЙЛ ~/.xinitrc

exec dbus-launch --exit-with-session <WINDOW_MANAGER>

WINDOW_MANAGER in the above example needs to be replaced by a window manager or a single application.

Совет
This exec command launches dbus-daemon --system, which launches your WM. No further commands will be executed if placed after this "exec" line

Suspend/Hibernate Resume/Thaw hook scripts

With elogind the situation is much handier. Any suspend/resume and hibernate/thaw hook scripts need to be in the directory /lib64/elogind/system-sleep/ and use the variables $1 (pre or post) and $2 (suspend, hibernate, or hybrid-sleep). For example, in the case of elogind a hook script could have the following format:

ФАЙЛ /lib64/elogind/system-sleep/example.shПример сценария elogind

#!/bin/bash
case $1/$2 in
  pre/*)
    # Put here any commands expected to be run when suspending or hibernating.
    ;;
  post/*)
    # Put here any commands expected to be run when resuming from suspension or thawing from hibernation.
    ;;
esac

Do not forget to make the hook scripts executable:

root #chmod +x /lib64/elogind/system-sleep/example.sh

Использование

loginctl

The command loginctl may be used to control and introspect the login manager. For example, to shut down or reboot the system:

user $loginctl poweroff

user $loginctl reboot

For example, to suspend, hibernate or hybrid-suspend the system:

user $loginctl suspend

user $loginctl hibernate

user $loginctl hybrid-sleep

To suspend the system and then hibernate after a period of inactivity while the system is suspended:

user $loginctl suspend-then-hibernate

where hibernation delay can be specified in /etc/elogind/logind.conf.

Устранение проблем

Confirmation of full functionality

Running loginctl itself will indicate ALL sessions/seats/users/tty's for which elogind has been fully activated. For example:

user $loginctl

SESSION  UID USER      SEAT  TTY 
      1    0 root      seat0 tty1
      2 1000 larry     seat0 tty2
 
2 sessions listed.

Checking for the presence of XDG environment variables should produce similar results, even before a GUI is loaded. For example:

user $env | grep "XDG"

XDG_CONFIG_DIRS=/etc/xdg:/etc/xdg
XDG_SEAT=seat0
XDG_SESSION_TYPE=tty
XDG_SESSION_CLASS=user
XDG_VTNR=2
XDG_SESSION_ID=2
XDG_RUNTIME_DIR=/run/user/1000
XDG_DATA_DIRS=/usr/local/share:/usr/share:/usr/share

Conflict when using hidepid in proc

When procfs is mounted with hidepid=2 and gid=wheel, there will be conflicts with elogind. In order to change this, the gid needs to be changed to gid=polkitd.

See also this forum post https://forums.gentoo.org/viewtopic-t-1099870.html

PAM

If using pam, make sure there are no conflicting pending changes waiting to be written to /etc (run dispatch-conf to merge any /etc/pam.d conflicts.)

Confirm these changes took place in these two /etc/pam.d files:

user $grep -r "elogind" /etc/pam.d/

/etc/pam.d/elogind-user: session optional pam_elogind.so
/etc/pam.d/system-login: -session        optional        pam_elogind.so

Внешние ресурсы

• bug #599470 - sys-auth/elogind integration into Gentoo tracker bug.
• News item - Desktop profile switching USE default to elogind