From b0b40248b4d229c78b760ac6affe304a8ed49bd9 Mon Sep 17 00:00:00 2001
From: Timothy Allen <tim@treehouse.org.za>
Date: Fri, 18 Jul 2025 11:12:43 +0200
Subject: [PATCH] Avoid bash expanding local files in grep arguments

---
 update_ip.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/update_ip.sh b/update_ip.sh
index 9a742e0..fe21634 100755
--- a/update_ip.sh
+++ b/update_ip.sh
@@ -12,7 +12,7 @@ zone=dyn.example.com
 host=desktop
 secret=""
 
-server_ip=$( dig +short ${server} | grep [0-9] | head -1 )
+server_ip=$( dig +short ${server} | grep "[0-9]" | head -1 )
 iface=$( ip route get ${server_ip} | grep -Po '(?<=(dev ))(\S+)' )
 
 # TODO trigger not via cron, but using ip monitor in a while/sleep loop: