From 0d5ca5cca128b80321023ce663515ab5b4e063c4 Mon Sep 17 00:00:00 2001
From: Joe Mou <dev@mou.fo>
Date: Sat, 27 Apr 2024 20:56:49 -0400
Subject: E-mail on reboot

mailutils (but not sendmail) addresses from the unqualified hostname
---
 hostnix/elmo/system.nix | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/hostnix/elmo/system.nix b/hostnix/elmo/system.nix
index 407ca42..23a6aa6 100644
--- a/hostnix/elmo/system.nix
+++ b/hostnix/elmo/system.nix
@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
 {
   boot.loader.systemd-boot.enable = true;
@@ -42,6 +42,17 @@
     script = "${pkgs.pciutils}/bin/setpci -s 00:1f.0 0xa4.b=0";
   };
 
+  systemd.services.boot-email = {
+    description = "Boot email";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      Type = "oneshot";
+    };
+    script = ''
+      echo -e "Subject: ${config.networking.fqdn} restarted\n\n$(date)" | /run/wrappers/bin/sendmail root
+    '';
+  };
+
   # https://wiki.archlinux.org/index.php/Systemd/Timers#MAILTO
   systemd.services."status-email@" = {
     description = "Status email for %i";
@@ -50,7 +61,7 @@
     };
     scriptArgs = "%i";
     script = ''
-      ${pkgs.mailutils}/bin/mail -s "$1 status" root <<EOF
+      /run/wrappers/bin/sendmail root <<EOF
       From: systemd <root>
       Subject: $1 status
       Content-Transfer-Encoding: 8bit
-- 
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