From c039e286b9116bcc4c5f4ac9e3fd64a8f667bcc6 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 27 Mar 2013 17:20:41 +0100
Subject: [PATCH] Set the kernel.poweroff_cmd sysctl

This allows Xen (and EC2) to power off an instance properly.  We had
this before (see aeb89fc753c6f95c9d143e6f5346f92e4a02fa67), but it got
lost in the systemd migration.
---
 modules/system/boot/shutdown.nix | 2 ++
 tests/misc.nix                   | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/modules/system/boot/shutdown.nix b/modules/system/boot/shutdown.nix
index 23ddf6d0202..ad71a2e816e 100644
--- a/modules/system/boot/shutdown.nix
+++ b/modules/system/boot/shutdown.nix
@@ -22,4 +22,6 @@ with pkgs.lib;
         '';
     };
 
+  boot.kernel.sysctl."kernel.poweroff_cmd" = "${config.systemd.package}/sbin/poweroff";
+
 }
diff --git a/tests/misc.nix b/tests/misc.nix
index 9f85877e8bb..118ed8f45cb 100644
--- a/tests/misc.nix
+++ b/tests/misc.nix
@@ -33,6 +33,11 @@
           $machine->waitForUnit("root-swapfile.swap");
           $machine->succeed("ls -l /root/swapfile | grep 134217728");
       };
+
+      # Test whether kernel.poweroff_cmd is set.
+      subtest "poweroff_cmd", sub {
+          $machine->succeed("[ -x \"\$(cat /proc/sys/kernel/poweroff_cmd)\" ]")
+      };
     '';
 
 }