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tmpfiles: create static device nodes before udev is started

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Since v183, the contents of /usr/lib/udev/devices is no longer copied to /dev
on boot, rather systemd-tmpfiles should be used instead. However, as
systemd-tmpfiles --create is only ran long after udevd has been started, it is
no longer possible to use udev rules to assign permissions to the static nodes.

This calls systemd-tmpfiles --create early, before udev is started, and
restricts the call to /dev, which is known to be mounted already.

In the future, this could also take over the creation of static device nodes
from systemd-udevd.
This commit is contained in:
Tom Gundersen 2013-04-11 21:14:40 +02:00
parent 4e3431bc39
commit 8c11aac1d7
2 changed files with 21 additions and 0 deletions
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5
Makefile.am
View File

@ -427,6 +427,7 @@ nodist_systemunit_DATA = \
units/systemd-kexec.service \
units/systemd-fsck@.service \
units/systemd-fsck-root.service \
units/systemd-static-nodes.service \
units/systemd-udevd.service \
units/systemd-udev-trigger.service \
units/systemd-udev-settle.service \
@ -468,6 +469,7 @@ EXTRA_DIST += \
units/systemd-fsck@.service.in \
units/systemd-fsck-root.service.in \
units/user@.service.in \
units/systemd-static-nodes.service \
units/systemd-udevd.service \
units/systemd-udev-trigger.service \
units/systemd-udev-settle.service \
@ -1939,11 +1941,13 @@ CLEANFILES += \
src/udev/udev.pc
EXTRA_DIST += \
units/systemd-static-nodes.service.in \
units/systemd-udevd.service.in \
units/systemd-udev-trigger.service.in \
units/systemd-udev-settle.service.in
CLEANFILES += \
units/systemd-static-nodes.service \
units/systemd-udevd.service \
units/systemd-udev-trigger.service \
units/systemd-udev-settle.service
@ -1952,6 +1956,7 @@ SOCKETS_TARGET_WANTS += \
systemd-udevd-control.socket \
systemd-udevd-kernel.socket
SYSINIT_TARGET_WANTS += \
systemd-static-nodes.service \
systemd-udevd.service \
systemd-udev-trigger.service

16
units/systemd-static-nodes.service.in Normal file
View File

@ -0,0 +1,16 @@
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
[Unit]
Description=Create static device nodes in /dev
DefaultDependencies=no
Before=sysinit.target systemd-udevd.service
ConditionCapability=CAP_MKNOD
[Service]
Type=oneshot
ExecStart=@rootbindir@/systemd-tmpfiles --prefix=/dev --create