From 9c7491d3cfa6454aeaeb7600e22d22df2f01c7cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Schr=C3=B6ter?= <dev@felschr.com>
Date: Fri, 3 Dec 2021 12:22:47 +0100
Subject: [PATCH] nixos/ddclient: support all special characters in password

(cherry picked from commit f0bd0f3e4c2383c0ecb646835ef68f69675b4031)
---
 nixos/modules/services/networking/ddclient.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/networking/ddclient.nix b/nixos/modules/services/networking/ddclient.nix
index fd9c216b0602..8a2c0fc7080c 100644
--- a/nixos/modules/services/networking/ddclient.nix
+++ b/nixos/modules/services/networking/ddclient.nix
@@ -31,8 +31,8 @@ let
   preStart = ''
     install ${configFile} /run/${RuntimeDirectory}/ddclient.conf
     ${lib.optionalString (cfg.configFile == null) (if (cfg.passwordFile != null) then ''
-      password=$(head -n 1 ${cfg.passwordFile})
-      sed -i "s/^password=$/password=$password/" /run/${RuntimeDirectory}/ddclient.conf
+      password=$(printf "%q" "$(head -n 1 "${cfg.passwordFile}")")
+      sed -i "s|^password=$|password=$password|" /run/${RuntimeDirectory}/ddclient.conf
     '' else ''
       sed -i '/^password=$/d' /run/${RuntimeDirectory}/ddclient.conf
     '')}