diff options
Diffstat (limited to 'nixpkgs/nixos/modules/system/boot/shutdown.nix')
-rw-r--r-- | nixpkgs/nixos/modules/system/boot/shutdown.nix | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/system/boot/shutdown.nix b/nixpkgs/nixos/modules/system/boot/shutdown.nix new file mode 100644 index 000000000000..11041066e07c --- /dev/null +++ b/nixpkgs/nixos/modules/system/boot/shutdown.nix @@ -0,0 +1,27 @@ +{ config, lib, pkgs, ... }: + +with lib; + +{ + + # This unit saves the value of the system clock to the hardware + # clock on shutdown. + systemd.services.save-hwclock = + { description = "Save Hardware Clock"; + + wantedBy = [ "shutdown.target" ]; + + unitConfig = { + DefaultDependencies = false; + ConditionPathExists = "/dev/rtc"; + }; + + serviceConfig = { + Type = "oneshot"; + ExecStart = "${pkgs.utillinux}/sbin/hwclock --systohc ${if config.time.hardwareClockInLocalTime then "--localtime" else "--utc"}"; + }; + }; + + boot.kernel.sysctl."kernel.poweroff_cmd" = "${config.systemd.package}/sbin/poweroff"; + +} |