fe934b42e4
If users do not enable a service like systemd-time-wait-sync.target (because they don't want to delay boot for external events, such as an NTP sync), then timers should still take the the weaker time-set.target feature into account, so that the clock is at least monotonic. Hence, order timer units after both of the targets: time-sync.target *and* time-set.target. That way, the right thing will happen regardless if people have no NTP server (and thus also no systemd-time-wait-sync.service or equivalent) or, only have an NTP server (and no systemd-time-wait-sync.service), or have both. Ordering after time-set.target is basically "free". The logic it is backed by should be instant, without communication with the outside going on. It's useful still so that time servers that implement the timestamp from /var/ logic can run in later boot.
116 lines
4.8 KiB
C
116 lines
4.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#define SPECIAL_DEFAULT_TARGET "default.target"
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#define SPECIAL_INITRD_TARGET "initrd.target"
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/* Shutdown targets */
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#define SPECIAL_UMOUNT_TARGET "umount.target"
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/* This is not really intended to be started by directly. This is
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* mostly so that other targets (reboot/halt/poweroff) can depend on
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* it to bring all services down that want to be brought down on
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* system shutdown. */
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#define SPECIAL_SHUTDOWN_TARGET "shutdown.target"
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#define SPECIAL_HALT_TARGET "halt.target"
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#define SPECIAL_POWEROFF_TARGET "poweroff.target"
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#define SPECIAL_REBOOT_TARGET "reboot.target"
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#define SPECIAL_KEXEC_TARGET "kexec.target"
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#define SPECIAL_EXIT_TARGET "exit.target"
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#define SPECIAL_SUSPEND_TARGET "suspend.target"
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#define SPECIAL_HIBERNATE_TARGET "hibernate.target"
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#define SPECIAL_HYBRID_SLEEP_TARGET "hybrid-sleep.target"
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#define SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET "suspend-then-hibernate.target"
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/* Special boot targets */
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#define SPECIAL_RESCUE_TARGET "rescue.target"
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#define SPECIAL_EMERGENCY_TARGET "emergency.target"
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#define SPECIAL_MULTI_USER_TARGET "multi-user.target"
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#define SPECIAL_GRAPHICAL_TARGET "graphical.target"
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/* Early boot targets */
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#define SPECIAL_SYSINIT_TARGET "sysinit.target"
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#define SPECIAL_SOCKETS_TARGET "sockets.target"
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#define SPECIAL_TIMERS_TARGET "timers.target"
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#define SPECIAL_PATHS_TARGET "paths.target"
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#define SPECIAL_LOCAL_FS_TARGET "local-fs.target"
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#define SPECIAL_LOCAL_FS_PRE_TARGET "local-fs-pre.target"
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#define SPECIAL_INITRD_FS_TARGET "initrd-fs.target"
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#define SPECIAL_INITRD_ROOT_DEVICE_TARGET "initrd-root-device.target"
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#define SPECIAL_INITRD_ROOT_FS_TARGET "initrd-root-fs.target"
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#define SPECIAL_REMOTE_FS_TARGET "remote-fs.target" /* LSB's $remote_fs */
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#define SPECIAL_REMOTE_FS_PRE_TARGET "remote-fs-pre.target"
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#define SPECIAL_SWAP_TARGET "swap.target"
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#define SPECIAL_NETWORK_ONLINE_TARGET "network-online.target"
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#define SPECIAL_TIME_SYNC_TARGET "time-sync.target" /* LSB's $time */
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#define SPECIAL_TIME_SET_TARGET "time-set.target"
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#define SPECIAL_BASIC_TARGET "basic.target"
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/* LSB compatibility */
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#define SPECIAL_NETWORK_TARGET "network.target" /* LSB's $network */
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#define SPECIAL_NSS_LOOKUP_TARGET "nss-lookup.target" /* LSB's $named */
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#define SPECIAL_RPCBIND_TARGET "rpcbind.target" /* LSB's $portmap */
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/*
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* Rules regarding adding further high level targets like the above:
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*
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* - Be conservative, only add more of these when we really need
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* them. We need strong usecases for further additions.
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*
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* - When there can be multiple implementations running side-by-side,
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* it needs to be a .target unit which can pull in all
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* implementations.
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*
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* - If something can be implemented with socket activation, and
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* without, it needs to be a .target unit, so that it can pull in
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* the appropriate unit.
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*
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* - Otherwise, it should be a .service unit.
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*
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* - In some cases it is OK to have both a .service and a .target
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* unit, i.e. if there can be multiple parallel implementations, but
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* only one is the "system" one. Example: syslog.
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*
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* Or to put this in other words: .service symlinks can be used to
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* arbitrate between multiple implementations if there can be only one
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* of a kind. .target units can be used to support multiple
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* implementations that can run side-by-side.
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*/
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/* Magic early boot services */
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#define SPECIAL_FSCK_SERVICE "systemd-fsck@.service"
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#define SPECIAL_FSCK_ROOT_SERVICE "systemd-fsck-root.service"
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#define SPECIAL_QUOTACHECK_SERVICE "systemd-quotacheck.service"
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#define SPECIAL_QUOTAON_SERVICE "quotaon.service"
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#define SPECIAL_REMOUNT_FS_SERVICE "systemd-remount-fs.service"
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#define SPECIAL_VOLATILE_ROOT_SERVICE "systemd-volatile-root.service"
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#define SPECIAL_UDEVD_SERVICE "systemd-udevd.service"
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/* Services systemd relies on */
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#define SPECIAL_DBUS_SERVICE "dbus.service"
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#define SPECIAL_DBUS_SOCKET "dbus.socket"
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#define SPECIAL_JOURNALD_SOCKET "systemd-journald.socket"
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#define SPECIAL_JOURNALD_SERVICE "systemd-journald.service"
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#define SPECIAL_TMPFILES_SETUP_SERVICE "systemd-tmpfiles-setup.service"
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/* Magic init signals */
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#define SPECIAL_KBREQUEST_TARGET "kbrequest.target"
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#define SPECIAL_SIGPWR_TARGET "sigpwr.target"
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#define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target"
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/* Where we add all our system units, users and machines by default */
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#define SPECIAL_SYSTEM_SLICE "system.slice"
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#define SPECIAL_USER_SLICE "user.slice"
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#define SPECIAL_MACHINE_SLICE "machine.slice"
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#define SPECIAL_ROOT_SLICE "-.slice"
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/* The scope unit systemd itself lives in. */
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#define SPECIAL_INIT_SCOPE "init.scope"
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/* The root directory. */
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#define SPECIAL_ROOT_MOUNT "-.mount"
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/* Special slices valid for the user instance */
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#define SPECIAL_SESSION_SLICE "session.slice"
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#define SPECIAL_APP_SLICE "app.slice"
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#define SPECIAL_BACKGROUND_SLICE "background.slice"
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