systemd/units/systemd-boot-random-seed.service

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# 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=Update Boot Loader Random Seed
Documentation=man:systemd-boot-random-seed.service(8) man:random(4)
DefaultDependencies=no
After=local-fs.target systemd-random-seed.service
Conflicts=shutdown.target
Before=sysinit.target shutdown.target
ConditionVirtualization=!container
ConditionPathExists=!/etc/initrd-release
# Only run this if the boot loader can support random seed initialization.
ConditionPathExists=|/sys/firmware/efi/efivars/LoaderFeatures-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
ConditionPathExists=|/sys/firmware/efi/efivars/StubFeatures-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=bootctl --graceful random-seed