639 lines
21 KiB
Nix
639 lines
21 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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with utils;
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with systemdUtils.unitOptions;
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with lib;
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let
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cfg = config.systemd;
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inherit (systemdUtils.lib)
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generateUnits
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targetToUnit
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serviceToUnit
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socketToUnit
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timerToUnit
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pathToUnit
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mountToUnit
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automountToUnit
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sliceToUnit;
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upstreamSystemUnits =
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[ # Targets.
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"basic.target"
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"sysinit.target"
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"sockets.target"
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"exit.target"
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"graphical.target"
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"multi-user.target"
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"network.target"
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"network-pre.target"
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"network-online.target"
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"nss-lookup.target"
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"nss-user-lookup.target"
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"time-sync.target"
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] ++ optionals cfg.package.withCryptsetup [
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"cryptsetup.target"
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"cryptsetup-pre.target"
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"remote-cryptsetup.target"
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] ++ [
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"sigpwr.target"
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"timers.target"
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"paths.target"
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"rpcbind.target"
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# Rescue mode.
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"rescue.target"
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"rescue.service"
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# Udev.
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"systemd-udevd-control.socket"
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"systemd-udevd-kernel.socket"
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"systemd-udevd.service"
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"systemd-udev-settle.service"
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] ++ (optional (!config.boot.isContainer) "systemd-udev-trigger.service") ++ [
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# hwdb.bin is managed by NixOS
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# "systemd-hwdb-update.service"
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# Consoles.
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"getty.target"
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"getty-pre.target"
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"getty@.service"
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"serial-getty@.service"
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"console-getty.service"
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"container-getty@.service"
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"systemd-vconsole-setup.service"
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# Hardware (started by udev when a relevant device is plugged in).
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"sound.target"
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"bluetooth.target"
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"printer.target"
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"smartcard.target"
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# Kernel module loading.
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"systemd-modules-load.service"
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"kmod-static-nodes.service"
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"modprobe@.service"
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# Filesystems.
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"systemd-fsck@.service"
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"systemd-fsck-root.service"
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"systemd-remount-fs.service"
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"systemd-pstore.service"
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"local-fs.target"
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"local-fs-pre.target"
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"remote-fs.target"
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"remote-fs-pre.target"
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"swap.target"
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"dev-hugepages.mount"
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"dev-mqueue.mount"
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"sys-fs-fuse-connections.mount"
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] ++ (optional (!config.boot.isContainer) "sys-kernel-config.mount") ++ [
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"sys-kernel-debug.mount"
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# Maintaining state across reboots.
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"systemd-random-seed.service"
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"systemd-backlight@.service"
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"systemd-rfkill.service"
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"systemd-rfkill.socket"
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# Hibernate / suspend.
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"hibernate.target"
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"suspend.target"
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"suspend-then-hibernate.target"
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"sleep.target"
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"hybrid-sleep.target"
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"systemd-hibernate.service"
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"systemd-hybrid-sleep.service"
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"systemd-suspend.service"
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"systemd-suspend-then-hibernate.service"
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# Reboot stuff.
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"reboot.target"
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"systemd-reboot.service"
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"poweroff.target"
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"systemd-poweroff.service"
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"halt.target"
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"systemd-halt.service"
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"shutdown.target"
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"umount.target"
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"final.target"
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"kexec.target"
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"systemd-kexec.service"
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] ++ lib.optional cfg.package.withUtmp "systemd-update-utmp.service" ++ [
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# Password entry.
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"systemd-ask-password-console.path"
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"systemd-ask-password-console.service"
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"systemd-ask-password-wall.path"
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"systemd-ask-password-wall.service"
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# Slices / containers.
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"slices.target"
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] ++ optionals cfg.package.withImportd [
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"systemd-importd.service"
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] ++ optionals cfg.package.withMachined [
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"machine.slice"
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"machines.target"
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"systemd-machined.service"
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] ++ [
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"systemd-nspawn@.service"
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# Misc.
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"systemd-sysctl.service"
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] ++ optionals cfg.package.withTimedated [
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"dbus-org.freedesktop.timedate1.service"
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"systemd-timedated.service"
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] ++ optionals cfg.package.withLocaled [
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"dbus-org.freedesktop.locale1.service"
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"systemd-localed.service"
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] ++ optionals cfg.package.withHostnamed [
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"dbus-org.freedesktop.hostname1.service"
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"systemd-hostnamed.service"
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] ++ optionals cfg.package.withPortabled [
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"dbus-org.freedesktop.portable1.service"
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"systemd-portabled.service"
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] ++ [
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"systemd-exit.service"
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"systemd-update-done.service"
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] ++ cfg.additionalUpstreamSystemUnits;
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upstreamSystemWants =
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[ "sysinit.target.wants"
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"sockets.target.wants"
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"local-fs.target.wants"
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"multi-user.target.wants"
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"timers.target.wants"
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];
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proxy_env = config.networking.proxy.envVars;
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in
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{
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###### interface
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options = {
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systemd.package = mkOption {
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default = pkgs.systemd;
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defaultText = literalExpression "pkgs.systemd";
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type = types.package;
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description = lib.mdDoc "The systemd package.";
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};
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systemd.units = mkOption {
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description = lib.mdDoc "Definition of systemd units.";
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default = {};
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type = systemdUtils.types.units;
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};
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systemd.packages = mkOption {
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default = [];
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type = types.listOf types.package;
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example = literalExpression "[ pkgs.systemd-cryptsetup-generator ]";
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description = lib.mdDoc "Packages providing systemd units and hooks.";
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};
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systemd.targets = mkOption {
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default = {};
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type = systemdUtils.types.targets;
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description = lib.mdDoc "Definition of systemd target units.";
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};
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systemd.services = mkOption {
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default = {};
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type = systemdUtils.types.services;
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description = lib.mdDoc "Definition of systemd service units.";
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};
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systemd.sockets = mkOption {
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default = {};
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type = systemdUtils.types.sockets;
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description = lib.mdDoc "Definition of systemd socket units.";
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};
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systemd.timers = mkOption {
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default = {};
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type = systemdUtils.types.timers;
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description = lib.mdDoc "Definition of systemd timer units.";
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};
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systemd.paths = mkOption {
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default = {};
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type = systemdUtils.types.paths;
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description = lib.mdDoc "Definition of systemd path units.";
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};
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systemd.mounts = mkOption {
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default = [];
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type = systemdUtils.types.mounts;
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description = lib.mdDoc ''
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Definition of systemd mount units.
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This is a list instead of an attrSet, because systemd mandates the names to be derived from
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the 'where' attribute.
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'';
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};
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systemd.automounts = mkOption {
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default = [];
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type = systemdUtils.types.automounts;
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description = lib.mdDoc ''
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Definition of systemd automount units.
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This is a list instead of an attrSet, because systemd mandates the names to be derived from
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the 'where' attribute.
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'';
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};
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systemd.slices = mkOption {
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default = {};
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type = systemdUtils.types.slices;
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description = lib.mdDoc "Definition of slice configurations.";
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};
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systemd.generators = mkOption {
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type = types.attrsOf types.path;
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default = {};
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example = { systemd-gpt-auto-generator = "/dev/null"; };
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description = lib.mdDoc ''
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Definition of systemd generators.
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For each `NAME = VALUE` pair of the attrSet, a link is generated from
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`/etc/systemd/system-generators/NAME` to `VALUE`.
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'';
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};
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systemd.shutdown = mkOption {
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type = types.attrsOf types.path;
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default = {};
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description = lib.mdDoc ''
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Definition of systemd shutdown executables.
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For each `NAME = VALUE` pair of the attrSet, a link is generated from
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`/etc/systemd/system-shutdown/NAME` to `VALUE`.
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'';
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};
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systemd.defaultUnit = mkOption {
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default = "multi-user.target";
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type = types.str;
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description = lib.mdDoc "Default unit started when the system boots.";
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};
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systemd.ctrlAltDelUnit = mkOption {
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default = "reboot.target";
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type = types.str;
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example = "poweroff.target";
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description = lib.mdDoc ''
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Target that should be started when Ctrl-Alt-Delete is pressed.
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'';
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};
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systemd.globalEnvironment = mkOption {
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type = with types; attrsOf (nullOr (oneOf [ str path package ]));
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default = {};
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example = { TZ = "CET"; };
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description = lib.mdDoc ''
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Environment variables passed to *all* systemd units.
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'';
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};
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systemd.managerEnvironment = mkOption {
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type = with types; attrsOf (nullOr (oneOf [ str path package ]));
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default = {};
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example = { SYSTEMD_LOG_LEVEL = "debug"; };
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description = lib.mdDoc ''
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Environment variables of PID 1. These variables are
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*not* passed to started units.
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'';
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};
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systemd.enableCgroupAccounting = mkOption {
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default = true;
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type = types.bool;
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description = lib.mdDoc ''
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Whether to enable cgroup accounting.
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'';
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};
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systemd.enableUnifiedCgroupHierarchy = mkOption {
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default = true;
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type = types.bool;
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description = lib.mdDoc ''
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Whether to enable the unified cgroup hierarchy (cgroupsv2).
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'';
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};
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systemd.extraConfig = mkOption {
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default = "";
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type = types.lines;
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example = "DefaultLimitCORE=infinity";
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description = lib.mdDoc ''
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Extra config options for systemd. See systemd-system.conf(5) man page
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for available options.
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'';
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};
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systemd.sleep.extraConfig = mkOption {
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default = "";
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type = types.lines;
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example = "HibernateDelaySec=1h";
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description = lib.mdDoc ''
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Extra config options for systemd sleep state logic.
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See sleep.conf.d(5) man page for available options.
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'';
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};
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systemd.additionalUpstreamSystemUnits = mkOption {
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default = [ ];
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type = types.listOf types.str;
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example = [ "debug-shell.service" "systemd-quotacheck.service" ];
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description = lib.mdDoc ''
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Additional units shipped with systemd that shall be enabled.
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'';
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};
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systemd.suppressedSystemUnits = mkOption {
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default = [ ];
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type = types.listOf types.str;
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example = [ "systemd-backlight@.service" ];
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description = lib.mdDoc ''
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A list of units to skip when generating system systemd configuration directory. This has
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priority over upstream units, {option}`systemd.units`, and
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{option}`systemd.additionalUpstreamSystemUnits`. The main purpose of this is to
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prevent a upstream systemd unit from being added to the initrd with any modifications made to it
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by other NixOS modules.
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'';
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};
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systemd.watchdog.device = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = "/dev/watchdog";
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description = lib.mdDoc ''
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The path to a hardware watchdog device which will be managed by systemd.
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If not specified, systemd will default to /dev/watchdog.
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'';
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};
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systemd.watchdog.runtimeTime = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "30s";
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description = lib.mdDoc ''
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The amount of time which can elapse before a watchdog hardware device
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will automatically reboot the system. Valid time units include "ms",
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"s", "min", "h", "d", and "w".
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'';
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};
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systemd.watchdog.rebootTime = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "10m";
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description = lib.mdDoc ''
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The amount of time which can elapse after a reboot has been triggered
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before a watchdog hardware device will automatically reboot the system.
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Valid time units include "ms", "s", "min", "h", "d", and "w".
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'';
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};
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systemd.watchdog.kexecTime = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "10m";
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description = lib.mdDoc ''
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The amount of time which can elapse when kexec is being executed before
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a watchdog hardware device will automatically reboot the system. This
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option should only be enabled if reloadTime is also enabled. Valid
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time units include "ms", "s", "min", "h", "d", and "w".
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'';
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};
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};
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###### implementation
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config = {
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warnings = concatLists (
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mapAttrsToList
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(name: service:
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let
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type = service.serviceConfig.Type or "";
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restart = service.serviceConfig.Restart or "no";
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hasDeprecated = builtins.hasAttr "StartLimitInterval" service.serviceConfig;
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in
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concatLists [
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(optional (type == "oneshot" && (restart == "always" || restart == "on-success"))
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"Service '${name}.service' with 'Type=oneshot' cannot have 'Restart=always' or 'Restart=on-success'"
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)
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(optional hasDeprecated
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"Service '${name}.service' uses the attribute 'StartLimitInterval' in the Service section, which is deprecated. See https://github.com/NixOS/nixpkgs/issues/45786."
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)
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(optional (service.reloadIfChanged && service.reloadTriggers != [])
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"Service '${name}.service' has both 'reloadIfChanged' and 'reloadTriggers' set. This is probably not what you want, because 'reloadTriggers' behave the same whay as 'restartTriggers' if 'reloadIfChanged' is set."
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)
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]
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)
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cfg.services
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);
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system.build.units = cfg.units;
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system.nssModules = [ cfg.package.out ];
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system.nssDatabases = {
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hosts = (mkMerge [
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(mkOrder 400 ["mymachines"]) # 400 to ensure it comes before resolve (which is mkBefore'd)
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(mkOrder 999 ["myhostname"]) # after files (which is 998), but before regular nss modules
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]);
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passwd = (mkMerge [
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(mkAfter [ "systemd" ])
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]);
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group = (mkMerge [
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(mkAfter [ "systemd" ])
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]);
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};
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environment.systemPackages = [ cfg.package ];
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environment.etc = let
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# generate contents for /etc/systemd/system-${type} from attrset of links and packages
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hooks = type: links: pkgs.runCommand "system-${type}" {
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preferLocalBuild = true;
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packages = cfg.packages;
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} ''
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set -e
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mkdir -p $out
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for package in $packages
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do
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for hook in $package/lib/systemd/system-${type}/*
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do
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ln -s $hook $out/
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done
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done
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${concatStrings (mapAttrsToList (exec: target: "ln -s ${target} $out/${exec};\n") links)}
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'';
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enabledUpstreamSystemUnits = filter (n: ! elem n cfg.suppressedSystemUnits) upstreamSystemUnits;
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enabledUnits = filterAttrs (n: v: ! elem n cfg.suppressedSystemUnits) cfg.units;
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in ({
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"systemd/system".source = generateUnits {
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type = "system";
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units = enabledUnits;
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upstreamUnits = enabledUpstreamSystemUnits;
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upstreamWants = upstreamSystemWants;
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};
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"systemd/system.conf".text = ''
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[Manager]
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ManagerEnvironment=${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "${n}=${lib.escapeShellArg v}") cfg.managerEnvironment)}
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${optionalString config.systemd.enableCgroupAccounting ''
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DefaultCPUAccounting=yes
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DefaultIOAccounting=yes
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DefaultBlockIOAccounting=yes
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DefaultIPAccounting=yes
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''}
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DefaultLimitCORE=infinity
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${optionalString (config.systemd.watchdog.device != null) ''
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WatchdogDevice=${config.systemd.watchdog.device}
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''}
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${optionalString (config.systemd.watchdog.runtimeTime != null) ''
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RuntimeWatchdogSec=${config.systemd.watchdog.runtimeTime}
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''}
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${optionalString (config.systemd.watchdog.rebootTime != null) ''
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RebootWatchdogSec=${config.systemd.watchdog.rebootTime}
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''}
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${optionalString (config.systemd.watchdog.kexecTime != null) ''
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KExecWatchdogSec=${config.systemd.watchdog.kexecTime}
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''}
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${config.systemd.extraConfig}
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'';
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"systemd/sleep.conf".text = ''
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[Sleep]
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${config.systemd.sleep.extraConfig}
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'';
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"systemd/system-generators" = { source = hooks "generators" cfg.generators; };
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"systemd/system-shutdown" = { source = hooks "shutdown" cfg.shutdown; };
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});
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services.dbus.enable = true;
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users.users.systemd-network = {
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uid = config.ids.uids.systemd-network;
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group = "systemd-network";
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};
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users.groups.systemd-network.gid = config.ids.gids.systemd-network;
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users.users.systemd-resolve = {
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uid = config.ids.uids.systemd-resolve;
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group = "systemd-resolve";
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};
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users.groups.systemd-resolve.gid = config.ids.gids.systemd-resolve;
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||
|
||
# Target for ‘charon send-keys’ to hook into.
|
||
users.groups.keys.gid = config.ids.gids.keys;
|
||
|
||
systemd.targets.keys =
|
||
{ description = "Security Keys";
|
||
unitConfig.X-StopOnReconfiguration = true;
|
||
};
|
||
|
||
systemd.units =
|
||
mapAttrs' (n: v: nameValuePair "${n}.path" (pathToUnit n v)) cfg.paths
|
||
// mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.services
|
||
// mapAttrs' (n: v: nameValuePair "${n}.slice" (sliceToUnit n v)) cfg.slices
|
||
// mapAttrs' (n: v: nameValuePair "${n}.socket" (socketToUnit n v)) cfg.sockets
|
||
// mapAttrs' (n: v: nameValuePair "${n}.target" (targetToUnit n v)) cfg.targets
|
||
// mapAttrs' (n: v: nameValuePair "${n}.timer" (timerToUnit n v)) cfg.timers
|
||
// listToAttrs (map
|
||
(v: let n = escapeSystemdPath v.where;
|
||
in nameValuePair "${n}.mount" (mountToUnit n v)) cfg.mounts)
|
||
// listToAttrs (map
|
||
(v: let n = escapeSystemdPath v.where;
|
||
in nameValuePair "${n}.automount" (automountToUnit n v)) cfg.automounts);
|
||
|
||
# Environment of PID 1
|
||
systemd.managerEnvironment = {
|
||
# Doesn't contain systemd itself - everything works so it seems to use the compiled-in value for its tools
|
||
# util-linux is needed for the main fsck utility wrapping the fs-specific ones
|
||
PATH = lib.makeBinPath (config.system.fsPackages ++ [cfg.package.util-linux]);
|
||
LOCALE_ARCHIVE = "/run/current-system/sw/lib/locale/locale-archive";
|
||
TZDIR = "/etc/zoneinfo";
|
||
# If SYSTEMD_UNIT_PATH ends with an empty component (":"), the usual unit load path will be appended to the contents of the variable
|
||
SYSTEMD_UNIT_PATH = lib.mkIf (config.boot.extraSystemdUnitPaths != []) "${builtins.concatStringsSep ":" config.boot.extraSystemdUnitPaths}:";
|
||
};
|
||
|
||
|
||
system.requiredKernelConfig = map config.lib.kernelConfig.isEnabled
|
||
[ "DEVTMPFS" "CGROUPS" "INOTIFY_USER" "SIGNALFD" "TIMERFD" "EPOLL" "NET"
|
||
"SYSFS" "PROC_FS" "FHANDLE" "CRYPTO_USER_API_HASH" "CRYPTO_HMAC"
|
||
"CRYPTO_SHA256" "DMIID" "AUTOFS4_FS" "TMPFS_POSIX_ACL"
|
||
"TMPFS_XATTR" "SECCOMP"
|
||
];
|
||
|
||
# Generate timer units for all services that have a ‘startAt’ value.
|
||
systemd.timers =
|
||
mapAttrs (name: service:
|
||
{ wantedBy = [ "timers.target" ];
|
||
timerConfig.OnCalendar = service.startAt;
|
||
})
|
||
(filterAttrs (name: service: service.enable && service.startAt != []) cfg.services);
|
||
|
||
# Some overrides to upstream units.
|
||
systemd.services."systemd-backlight@".restartIfChanged = false;
|
||
systemd.services."systemd-fsck@".restartIfChanged = false;
|
||
systemd.services."systemd-fsck@".path = [ config.system.path ];
|
||
systemd.services.systemd-random-seed.restartIfChanged = false;
|
||
systemd.services.systemd-remount-fs.restartIfChanged = false;
|
||
systemd.services.systemd-update-utmp.restartIfChanged = false;
|
||
systemd.services.systemd-udev-settle.restartIfChanged = false; # Causes long delays in nixos-rebuild
|
||
systemd.targets.local-fs.unitConfig.X-StopOnReconfiguration = true;
|
||
systemd.targets.remote-fs.unitConfig.X-StopOnReconfiguration = true;
|
||
systemd.targets.network-online.wantedBy = [ "multi-user.target" ];
|
||
systemd.services.systemd-importd.environment = proxy_env;
|
||
systemd.services.systemd-pstore.wantedBy = [ "sysinit.target" ]; # see #81138
|
||
|
||
# NixOS has kernel modules in a different location, so override that here.
|
||
systemd.services.kmod-static-nodes.unitConfig.ConditionFileNotEmpty = [
|
||
"" # required to unset the previous value!
|
||
"/run/booted-system/kernel-modules/lib/modules/%v/modules.devname"
|
||
];
|
||
|
||
# Don't bother with certain units in containers.
|
||
systemd.services.systemd-remount-fs.unitConfig.ConditionVirtualization = "!container";
|
||
systemd.services.systemd-random-seed.unitConfig.ConditionVirtualization = "!container";
|
||
|
||
# Increase numeric PID range (set directly instead of copying a one-line file from systemd)
|
||
# https://github.com/systemd/systemd/pull/12226
|
||
boot.kernel.sysctl."kernel.pid_max" = mkIf pkgs.stdenv.is64bit (lib.mkDefault 4194304);
|
||
|
||
boot.kernelParams = optional (!cfg.enableUnifiedCgroupHierarchy) "systemd.unified_cgroup_hierarchy=0";
|
||
|
||
services.logrotate.settings = {
|
||
"/var/log/btmp" = mapAttrs (_: mkDefault) {
|
||
frequency = "monthly";
|
||
rotate = 1;
|
||
create = "0660 root ${config.users.groups.utmp.name}";
|
||
minsize = "1M";
|
||
};
|
||
"/var/log/wtmp" = mapAttrs (_: mkDefault) {
|
||
frequency = "monthly";
|
||
rotate = 1;
|
||
create = "0664 root ${config.users.groups.utmp.name}";
|
||
minsize = "1M";
|
||
};
|
||
};
|
||
};
|
||
|
||
# FIXME: Remove these eventually.
|
||
imports =
|
||
[ (mkRenamedOptionModule [ "boot" "systemd" "sockets" ] [ "systemd" "sockets" ])
|
||
(mkRenamedOptionModule [ "boot" "systemd" "targets" ] [ "systemd" "targets" ])
|
||
(mkRenamedOptionModule [ "boot" "systemd" "services" ] [ "systemd" "services" ])
|
||
(mkRenamedOptionModule [ "jobs" ] [ "systemd" "services" ])
|
||
(mkRemovedOptionModule [ "systemd" "generator-packages" ] "Use systemd.packages instead.")
|
||
];
|
||
}
|