Eudev
eudev
is a fork of udev started by the Gentoo project, with the goal of isolation from the init system. It is primarily designed and tested with OpenRC, but is agnostic to any other init systems.
Contents
Installation
Install the eudevAUR package. Alternatively, install eudev-gitAUR for the development version.
libsystemd
This package will also remove libsystemd as it replaces a part of it. The missing libraries are available from:
- libsystemd-standaloneAUR — a package group with libraries separated into a package each.
- eudev-systemdcompatAUR — a package that guts the official libsystemd package and installs the missing libraries.
You also probably want systemd-dummyAUR to satisfy the missing systemd dependency.
Alternatively, you may rebuild packages linked to libsystemd using ABS, or install nosystemd
variants from the AUR.
Replacing the systemd package
The systemd packages include several components besides the init system and systemd-udev:
- systemd libraries linked against software such as Xorg. See #libsystemd.
- systemd-tmpfiles to create temporary files on system startup. Some rc scripts reimplement this, for example tmpfiles.sh.
- systemd-sysusers to allocate system users and groups in pacman
.install
files
If you have removed systemd without booting to the new init, a reboot is not possible in regular ways. Enable SysRq keys:
# sysctl kernel.sysrq=1
and press Alt-SysRq-S
, Alt-SysRq-U
and Alt-SysRq-B
in succession. This syncs all mounted file systems, remounts all disk as read-only, and reboots the system, respectively. If latter is not possible, press Alt-SysRq-O
to poweroff). In case the system is a remote box, you must sync and remount read-only its filesystems before triggering an immediate reboot (edit your filesystems accordingly):
# sync; mount -f /home -o remount,ro ; sync; mount -f / -o remount,ro # echo b >| /proc/sysrq-trigger
Troubleshooting
Fails to start
Check the init script for eudev (aliased to udev, so /etc/openrc/init.d/udev on an OpenRC setup for example) and ensure the command points to /usr/bin/udevd.
netctl
netctl is not compatible due to dependency on systemd libs, instead, use netcfgAUR, avaliable in the AUR.
Device naming
Your net devices will follow the pre-systemd pattern: from example wlp1s0
should be renamed to wlan0
. You have to set your net configuration properly.
sysctl
Your files in /etc/sysctl.d/
might disappear after removing systemd. OpenRC reads /etc/sysctl.conf
.