#  SPDX-License-Identifier: LGPL-2.1-or-later
#
#  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=Rule-based Manager for Device Events and Files
Documentation=man:systemd-udevd.service(8) man:udev(7)
DefaultDependencies=no
After=systemd-sysusers.service systemd-hwdb-update.service
Before=sysinit.target
Wants=systemd-udev-load-credentials.service
ConditionPathIsReadWrite=/sys

# To avoid systemd-udevd being SIGKILLed during a soft reboot,
# and causing queued uevents to be lost.
# Note, typically soft-reboot.target will be never reached,
# and systemd-soft-reboot.service will trigger soft-reboot.
# Hence, this must be stopped before systemd-soft-reboot.service.
Before=soft-reboot.target systemd-soft-reboot.service
Conflicts=soft-reboot.target

# To avoid this service being triggered by a relevant socket unit during
# switching root, which easily happens due to kernel events.
# Note, unlike soft-reboot (and any other shutting down processes),
# initrd-switching-root.service is started after initrd-switch-root.target.
# Hence, we need to also add the service to Conflicts=.
Before=initrd-switch-root.target initrd-switch-root.service
Conflicts=initrd-switch-root.target initrd-switch-root.service

[Service]
CapabilityBoundingSet=~CAP_SYS_TIME CAP_WAKE_ALARM
Delegate=
DelegateSubgroup=udev
Type=notify-reload
# Note that udev will reset the value internally for its workers
OOMScoreAdjust=-1000
Sockets=systemd-udevd-control.socket systemd-udevd-kernel.socket systemd-udevd-varlink.socket
Restart=always
RestartSec=0
ExecStart=/usr/lib/systemd/systemd-udevd
FileDescriptorStoreMax=512
FileDescriptorStorePreserve=yes
KillMode=mixed
TasksMax=infinity
PrivateMounts=yes
ProtectHostname=yes
MemoryDenyWriteExecute=yes
RestrictAddressFamilies=AF_UNIX AF_NETLINK AF_INET AF_INET6
RestrictRealtime=yes
RestrictSUIDSGID=yes
SystemCallFilter=@system-service @module @raw-io bpf
SystemCallFilter=~@clock
SystemCallErrorNumber=EPERM
SystemCallArchitectures=native
LockPersonality=yes
IPAddressDeny=any