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Zbigniew Jędrzejewski-Szmek 01d2041e41 meson: stop creating enablement symlinks in /etc during installation 
This patch was initially prompted by a report on a Fedora update [1], that the
upgrade causes systemd-resolved.service and systemd-networkd.service to be
re-enabled. We generally want to preserve the enablement of all services during
upgrades, so a reset like this is not expected.

Both services declare two symlinks in their [Install] sections, for their dbus
names and for multi-user.target.wants/.  It turns out that both services were
only partially enabled, because their dbus unit symlinks
/etc/systemd/system/dbus-org.freedesktop.{resolve1,network1}.service were
created, by the symlinks in /etc/systemd/system/multi-user.target.wants/ were
not. This means that the units could be activated by dbus, but not in usual
fashion using systemctl start. Our tools make it rather hard to figure out when
something like this happens, and it is definitely an area for improvement on its
own. The symlink in .wants/ was filtered out by during packaging, but the dbus
symlink was left in (I assume by mistake).

Let's simplify things by not creating the symlinks statically during 'ninja
install'. This means that the units shipped by systemd have to be enabled in
the usual fashion, which in turns means that [Install] section and presets
become the "single source of truth" and we don't have two sets of conflicting
configuration.

Let's consider a few cases:
- developer: a developer installs systemd from git on a running system, and they
  don't want the installation to reset enablement of anything. So this change is
  either positive for them, or has no effect (if they have everything at
  defaults).

- package creation: we want to create symlinks using 'preset-all' and 'preset'
  on upgraded packages, we don't want to have any static symlinks. This change
  will remove the need to filter out symlinks in packaging and of course fix
  the original report.

- installation of systemd from scratch: this change means that without
  'preset-all' the system will not be functional. This case could be affected
  negatively by this change, but I think it's enough of a corner case to accept
  this. In practice I expect people to build a package, not installl directly
  into the file system, so this might not even matter in practice.

Creating those symlinks was probably the right thing in the beginning, but
nowadays the preset system is very well established and people expect it to
be honoured. Ignoring the presets and doing static configuration is not welcome
anymore.

Note: during package installation, either 'preset-all' or 'preset getty@.service
machines.target remote-cryptsetup.target remote-fs.target
systemd-networkd.service systemd-resolved.service
systemd-networkd-wait-online.service systemd-timesyncd.service' should be called.

[1] https://bodhi.fedoraproject.org/updates/FEDORA-2019-616045ca76
2019-04-01 14:24:44 +02:00
..
user man,units: document what user "default.target" is a bit 2019-03-15 13:55:24 +01:00
user-.slice.d units: set StopWhenUnneeded= for the user slice units too 2018-10-13 12:59:29 +02:00
basic.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
bluetooth.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
boot-complete.target units: add generic boot-complete.target 2018-10-19 22:34:50 +02:00
console-getty.service.m4 unit,meson: drop .in suffix if no substitution is required (#8740) 2018-04-17 19:49:10 +02:00
container-getty@.service.m4 unit,meson: drop .in suffix if no substitution is required (#8740) 2018-04-17 19:49:10 +02:00
cryptsetup-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
debug-shell.service.in units: link up debug-generator documentation from debug-shell.service 2017-12-26 12:13:51 +01:00
dev-hugepages.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
dev-mqueue.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
emergency.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
emergency.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
exit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
final.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
graphical.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
halt-local.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
halt.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hibernate.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hybrid-sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-cleanup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-parse-etc.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-device.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.target units: make sure initrd-cleanup.service terminates before switching to rootfs 2019-01-28 13:41:28 +01:00
initrd-udevadm-cleanup-db.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kexec.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kmod-static-nodes.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
ldconfig.service Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machine.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machines.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
meson-add-wants.sh meson: fix dirname/basename confusion in meson-and-wants.sh install helper (#10126) 2018-09-20 16:01:58 +09:00
meson.build meson: stop creating enablement symlinks in /etc during installation 2019-04-01 14:24:44 +02:00
multi-user.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-online.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-user-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
paths.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
poweroff.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
printer.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.automount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
quotaon.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rc-local.service.in man: add a systemd-rc-local-generator(8) man page 2017-12-26 12:13:51 +01:00
reboot.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rpcbind.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
serial-getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
shutdown.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sigpwr.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
slices.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
smartcard.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sockets.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sound.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
suspend-then-hibernate.target Fix description on suspend-then-hibernate units. 2018-03-28 15:26:18 -05:00
suspend.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
swap.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sys-fs-fuse-connections.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sys-kernel-config.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sys-kernel-debug.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sysinit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
syslog.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
system-update-cleanup.service units: fix systemd.special man page reference in system-update-cleanup.service 2019-03-07 14:42:43 +01:00
system-update-pre.target units: make system-update-pre.target a passive unit (#9349) 2018-06-20 12:46:18 +02:00
system-update.target units: fix typo in After= 2018-06-20 18:14:43 +02:00
systemd-ask-password-console.path emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-console.service.in emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-wall.path emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-wall.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-backlight@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-binfmt.service.in fix url for binfmt documentation (#8720) 2018-04-14 15:15:19 +02:00
systemd-bless-boot.service.in add new systemd-bless-boot.service that marks boots as successful 2018-10-19 22:34:50 +02:00
systemd-boot-check-no-failures.service.in units: add simple boot check unit 2018-10-19 22:34:50 +02:00
systemd-coredump.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-coredump@.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-exit.service units: fix Description= of systemd-exit.service 2018-11-16 12:25:35 +01:00
systemd-firstboot.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-fsck-root.service.in units: make fsck/grows/makefs/makeswap units conflict against shutdown.target 2018-11-26 22:18:16 +01:00
systemd-fsck@.service.in units: make fsck/grows/makefs/makeswap units conflict against shutdown.target 2018-11-26 22:18:16 +01:00
systemd-halt.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate-resume@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hostnamed.service.in units: re-drop ProtectHostname from systemd-hostnamed.service (#11792) 2019-02-22 08:04:37 +01:00
systemd-hwdb-update.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hybrid-sleep.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-importd.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-initctl.service.in units: set NoNewPrivileges= for all long-running services 2018-11-12 19:02:55 +01:00
systemd-initctl.socket units: initctl: move the fifo to /run/initctl to match sysvinit 2018-03-30 16:52:14 -04:00
systemd-journal-catalog-update.service.in units: update catalog after systemd-tmpfiles runs 2019-03-14 11:28:19 +01:00
systemd-journal-flush.service.in units: drop systemd-user-sessions.service ordering dep on systemd-journal-flush.service (#10502) 2018-10-25 04:41:02 +09:00
systemd-journal-gatewayd.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-journal-gatewayd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-remote.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-journal-remote.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-upload.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-journald-audit.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald-dev-log.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald.service.in units: turn of ProtectHostname= again for services hat need to know about system hostname changes 2019-03-08 15:49:10 +01:00
systemd-journald.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-kexec.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-localed.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-logind.service.in Revert "Revert "units: lock down logind with fs namespacing options"" 2019-03-19 10:58:49 +01:00
systemd-machine-id-commit.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-machined.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-modules-load.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd-wait-online.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd.service.in units: turn of ProtectHostname= again for services hat need to know about system hostname changes 2019-03-08 15:49:10 +01:00
systemd-networkd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-nspawn@.service.in nspawn: turn on watchdog logic for nspawn too 2017-12-07 12:34:46 +01:00
systemd-portabled.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-poweroff.service units: use SuccessAction=poweroff-force in systemd-poweroff.service 2018-10-17 19:31:50 +02:00
systemd-quotacheck.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-random-seed.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-reboot.service units: use SuccessAction=reboot-force in systemd-reboot.service 2018-10-17 19:31:50 +02:00
systemd-remount-fs.service.in Pull in systemd-remount-fs.service only when required 2019-01-03 15:30:28 +01:00
systemd-resolved.service.in units: turn of ProtectHostname= again for services hat need to know about system hostname changes 2019-03-08 15:49:10 +01:00
systemd-rfkill.service.in units: set NoNewPrivileges= for all long-running services 2018-11-12 19:02:55 +01:00
systemd-rfkill.socket units: order systemd-rfkill.socket after /var/lib/systemd/rfkill (#10904) 2018-11-24 23:59:37 +09:00
systemd-suspend-then-hibernate.service.in Fix description on suspend-then-hibernate units. 2018-03-28 15:26:18 -05:00
systemd-suspend.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysctl.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysusers.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-time-wait-sync.service.in units: document why systemd-time-wait-sync.service conditions on CAP_SYS_TIME (#8555) 2018-03-22 23:41:54 +03:00
systemd-timedated.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-timesyncd.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-tmpfiles-clean.service.in units: use SuccessExitStatus to ignore syntax errors in tmpfiles 2017-12-01 18:58:54 +01:00
systemd-tmpfiles-clean.timer Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-tmpfiles-setup-dev.service.in units: drop conditionalization of systemd-tmpfiles-setup-dev.service 2019-01-26 13:55:18 +01:00
systemd-tmpfiles-setup.service.in tmpfiles: Order tmpfiles-setup after journald 2018-09-20 13:20:41 +02:00
systemd-udev-settle.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udev-trigger.service.in units: let's use two ExecStart= lines instead of ; 2018-06-20 23:59:29 +02:00
systemd-udevd-control.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd-kernel.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-update-done.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp-runlevel.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-user-sessions.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-vconsole-setup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-volatile-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
time-sync.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
timers.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
tmp.mount man,units: link up new documentation about temporary directories 2019-02-20 18:31:18 +01:00
umount.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
usb-gadget.target units: add usb-gadget target 2019-02-15 18:16:27 +01:00
user-runtime-dir@.service.in units: use =yes rather than =true everywhere 2018-10-13 12:59:29 +02:00
user.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
user@.service.in units: turn off keyring handling for user@.service 2019-03-19 10:58:20 +01:00
var-lib-machines.mount import: drop logic of setting up /var/lib/machines as btrfs loopback mount 2018-11-26 18:09:01 +01:00