units/system-update-cleanup.service.in

   1 #  SPDX-License-Identifier: LGPL-2.1+
   2 #
   3 #  This file is part of systemd.
   4 #
   5 #  systemd is free software; you can redistribute it and/or modify it
   6 #  under the terms of the GNU Lesser General Public License as published by
   7 #  the Free Software Foundation; either version 2.1 of the License, or
   8 #  (at your option) any later version.
   9
  10 [Unit]
  11 Description=Remove the Offline System Updates symlink
  12 Documentation=man:systemd.special(5) man:systemd.offline-updates(7)
  13 After=system-update.target
  14 DefaultDependencies=no
  15 Conflicts=shutdown.target
  16 Before=shutdown.target
  17
  18 # system-update-generator uses laccess("/system-update"), while a plain
  19 # ConditionPathExists=/system-update uses access("/system-update"), so
  20 # we need an alternate condition to cover the case of a dangling symlink.
  21 #
  22 # This service is only invoked if /system-update exists, i.e. if the
  23 # condition tested by system-update-generator remains true and the system
  24 # would be diverted into system-update.target again after reboot. This way
  25 # we guard against being diverted into system-update.target again, which
  26 # works as a safety measure, but we will not step on the toes of the
  27 # update script if it successfully removed the symlink and scheduled a
  28 # reboot or some other action on its own.
  29 ConditionPathExists=|/system-update
  30 ConditionPathIsSymbolicLink=|/system-update
  31
  32 [Service]
  33 Type=oneshot
  34 ExecStart=/bin/rm -fv /system-update
  35 ExecStart=@SYSTEMCTL@ reboot