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systemd/units/systemd-vconsole-setup.service.in

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license: LGPL-2.1+ -> LGPL-2.1-or-later
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# SPDX-License-Identifier: LGPL-2.1-or-later
Add SPDX license headers to unit files
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#
vconsole: add new utility to initialize the virtual console
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# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
relicense to LGPLv2.1 (with exceptions) We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
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# 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
vconsole: add new utility to initialize the virtual console
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# (at your option) any later version.
[Unit]
units/systemd-vconsole-setup.service: improve title "Setup" is a noun, and the expected order is "<adjective> <noun>". ("Set up" is the verb. But we want a noun here, so that we can say e.g. "Starting Virtual Console Setup".)
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Description=Virtual Console Setup
man: document systemd-vconsole-setup.service
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Documentation=man:systemd-vconsole-setup.service(8) man:vconsole.conf(5)
units: do more reordering of ordering config No functional change, just a cleanup to make the subsequent changes easier to see. This is a continuation of 9810e419425263bde86787bc21251f1ad3c35628 > The block is reordered and split to have: > 1. description + documentation > 2. (optionally) conditions > 3. all the dependencies The dependencies for shutdown.target are listed separately because they are the other deps are for startup, and shutdown.target only matter much later.
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ConditionPathExists=/dev/tty0
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DefaultDependencies=no
units: order sysinit.target, debug-shell.service after systemd-vconsole-setup Previous patch to add an implicit dependency effectively orders various getty services after systemd-vconsole-setup.service. But I think it's cleaner to also order the service before sysinit.target, like it was before 8125e8d38e3aa099c7dce8b0161997b8842aebdc. There might be units which don't do use TTYVHangup= but would like to have the console fully initialized. Also, add a manual ordering to debug-shell.service, because it has ImplicitDependencies=no. This might delay debug-shell.service a bit, but systemd-vconsole-setup.service has no dependencies and should be very quick, so this should not be noticable in practice. Without the ordering, the terminal might not have a key map loaded, making debug-shell.service hard to use.
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Before=sysinit.target
units: restore Before dependencies for systemd-vconsole-setup.service When the service is run in the initramfs, it is possible for it to get started and not be fast enough to exit before the root switch happens. It is started multiple times (depending on the consoles being detected), and runs asynchronously, so this is quite likely. It'll then get killed by killall(), and systemd will consider the service failed. To avoid all this, just wait for the service to terminate on it's own. Before=initrd-switch-root.target should be good for the initramfs, and Before=shutdown.tuarget should be good for the real system, although it's unlikely to make any difference there.
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Before=initrd-switch-root.target shutdown.target
vconsole: add new utility to initialize the virtual console
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units: disable start rate limit for systemd-vconsole-setup.service The unit will be started or restarted a few times during boot, but but it has StartLimitBurst = DefaultStartLimitBurst = 5, which means that the fifth restart will already fail. On my laptop, I have exactly 4 restarts, so I don't hit the limit, but on a slightly different system we will easily hit the limit. In https://bugzilla.redhat.com/show_bug.cgi?id=2251394, there are five reloads and we hit the limit. Since 6ef512c0bb7aeb2000588d7d05e23b4681da8657 we propagate the start counter over switch-root and daemon reloads, so it's easier to hit the limit during boot. In principle there might be systems with lots of vtcon devices, so let's just allow the unit to be restarted without a limit. Fixes https://bugzilla.redhat.com/show_bug.cgi?id=2251394.
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# This unit will be restarted by udev whenever a new vtcon device appears or is
# triggered. Usually that happens just a handful of times during boot, but some
# systems may have hundreds or thousands of serial consoles connected, so let's
# just disable the limit altogether.
StartLimitIntervalSec=0
vconsole: add new utility to initialize the virtual console
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[Service]
Type=oneshot
units/systemd-vconsole-setup: suppress error when service is restarted The service has Type=oneshot, which means that the default value of SuccessExitStatus=0. When multiple vtcon devices are detected, udev will restart the service after each one. If this happens quickly enough, the old instance will get SIGTERM while it is still running: [ 5.357341] (udev-worker)[593]: vtcon1: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357439] (udev-worker)[593]: vtcon1: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357485] (udev-worker)[593]: vtcon1: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' [ 5.357537] (udev-worker)[609]: vtcon0: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357587] (udev-worker)[609]: vtcon0: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357634] (udev-worker)[609]: vtcon0: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' ... [ 5.680529] systemd[1]: systemd-vconsole-setup.service: Trying to enqueue job systemd-vconsole-setup.service/restart/replace [ 5.680565] systemd[1]: systemd-vconsole-setup.service: Merged into running job, re-running: systemd-vconsole-setup.service/restart as 557 [ 5.680600] systemd[1]: systemd-vconsole-setup.service: Enqueued job systemd-vconsole-setup.service/restart as 557 ... [ 5.682334] systemd[1]: Received SIGCHLD from PID 744 ((le-setup)). [ 5.682377] systemd[1]: Child 744 ((le-setup)) died (code=killed, status=15/TERM) [ 5.682407] systemd[1]: systemd-vconsole-setup.service: Child 744 belongs to systemd-vconsole-setup.service. [ 5.682436] systemd[1]: systemd-vconsole-setup.service: Main process exited, code=killed, status=15/TERM [ 5.682471] systemd[1]: systemd-vconsole-setup.service: Failed with result 'signal'. [ 5.682518] systemd[1]: systemd-vconsole-setup.service: Service will not restart (manual stop) [ 5.682552] systemd[1]: systemd-vconsole-setup.service: Changed stop-sigterm -> failed This is expected and not a problem. Let's treat SIGTERM as success so we don't get this spurious "failure".
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# This service will be restarted by udev whenever a new vtcon device appears.
# If the previous instance is still running, it shall be interrupted without
# error.
SuccessExitStatus=SIGTERM
units: restore RemainAfterExit=yes in systemd-vconsole-setup.service This reverts the second part of 8125e8d38e3aa099c7dce8b0161997b8842aebdc. The first part was reverted in 750e550eba362096d56a35104c6a32631aa67b8e. The problem starts when s-v-s.s is pulled in by something that is then pulled in by sysinit.target. Every time a unit is started, systemd recursively checks all dependencies, and since sysinit.target is pull in by almost anything, we'll start s-v-s.s over and over. In particular, plymouth-start.service currently has Wants=s-v-s.s and After=s-v-s.s.
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RemainAfterExit=yes
units/systemd-vconsole-setup: suppress error when service is restarted The service has Type=oneshot, which means that the default value of SuccessExitStatus=0. When multiple vtcon devices are detected, udev will restart the service after each one. If this happens quickly enough, the old instance will get SIGTERM while it is still running: [ 5.357341] (udev-worker)[593]: vtcon1: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357439] (udev-worker)[593]: vtcon1: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357485] (udev-worker)[593]: vtcon1: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' [ 5.357537] (udev-worker)[609]: vtcon0: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357587] (udev-worker)[609]: vtcon0: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357634] (udev-worker)[609]: vtcon0: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' ... [ 5.680529] systemd[1]: systemd-vconsole-setup.service: Trying to enqueue job systemd-vconsole-setup.service/restart/replace [ 5.680565] systemd[1]: systemd-vconsole-setup.service: Merged into running job, re-running: systemd-vconsole-setup.service/restart as 557 [ 5.680600] systemd[1]: systemd-vconsole-setup.service: Enqueued job systemd-vconsole-setup.service/restart as 557 ... [ 5.682334] systemd[1]: Received SIGCHLD from PID 744 ((le-setup)). [ 5.682377] systemd[1]: Child 744 ((le-setup)) died (code=killed, status=15/TERM) [ 5.682407] systemd[1]: systemd-vconsole-setup.service: Child 744 belongs to systemd-vconsole-setup.service. [ 5.682436] systemd[1]: systemd-vconsole-setup.service: Main process exited, code=killed, status=15/TERM [ 5.682471] systemd[1]: systemd-vconsole-setup.service: Failed with result 'signal'. [ 5.682518] systemd[1]: systemd-vconsole-setup.service: Service will not restart (manual stop) [ 5.682552] systemd[1]: systemd-vconsole-setup.service: Changed stop-sigterm -> failed This is expected and not a problem. Let's treat SIGTERM as success so we don't get this spurious "failure".
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Drop split-usr and unmerged-usr support As previously announced, execute order 66: https://lists.freedesktop.org/archives/systemd-devel/2022-September/048352.html The meson options split-usr, rootlibdir and rootprefix become no-ops that print a warning if they are set to anything other than the default values. We can remove them in a future release.
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ExecStart={{LIBEXECDIR}}/systemd-vconsole-setup
units/systemd-vconsole-setup: suppress error when service is restarted The service has Type=oneshot, which means that the default value of SuccessExitStatus=0. When multiple vtcon devices are detected, udev will restart the service after each one. If this happens quickly enough, the old instance will get SIGTERM while it is still running: [ 5.357341] (udev-worker)[593]: vtcon1: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357439] (udev-worker)[593]: vtcon1: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357485] (udev-worker)[593]: vtcon1: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' [ 5.357537] (udev-worker)[609]: vtcon0: /usr/lib/udev/rules.d/90-vconsole.rules:12 RUN '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service [ 5.357587] (udev-worker)[609]: vtcon0: Running command "/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service" [ 5.357634] (udev-worker)[609]: vtcon0: Starting '/usr/bin/systemctl --no-block restart systemd-vconsole-setup.service' ... [ 5.680529] systemd[1]: systemd-vconsole-setup.service: Trying to enqueue job systemd-vconsole-setup.service/restart/replace [ 5.680565] systemd[1]: systemd-vconsole-setup.service: Merged into running job, re-running: systemd-vconsole-setup.service/restart as 557 [ 5.680600] systemd[1]: systemd-vconsole-setup.service: Enqueued job systemd-vconsole-setup.service/restart as 557 ... [ 5.682334] systemd[1]: Received SIGCHLD from PID 744 ((le-setup)). [ 5.682377] systemd[1]: Child 744 ((le-setup)) died (code=killed, status=15/TERM) [ 5.682407] systemd[1]: systemd-vconsole-setup.service: Child 744 belongs to systemd-vconsole-setup.service. [ 5.682436] systemd[1]: systemd-vconsole-setup.service: Main process exited, code=killed, status=15/TERM [ 5.682471] systemd[1]: systemd-vconsole-setup.service: Failed with result 'signal'. [ 5.682518] systemd[1]: systemd-vconsole-setup.service: Service will not restart (manual stop) [ 5.682552] systemd[1]: systemd-vconsole-setup.service: Changed stop-sigterm -> failed This is expected and not a problem. Let's treat SIGTERM as success so we don't get this spurious "failure".
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units: Use ImportCredential= where applicable
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ImportCredential=vconsole.*
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