From 1d22c6dc076c8b8efd5a6fd4addc3cbc85182a37 Mon Sep 17 00:00:00 2001
From: Tim Eertmoed <tim@eertmoed.de>
Date: Mon, 28 Oct 2024 14:02:25 +0100
Subject: [PATCH] =?UTF-8?q?usr/bin/hostname=20hinzugef=C3=BCgt?=
MIME-Version: 1.0
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---
 usr/bin/hostname | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 usr/bin/hostname

diff --git a/usr/bin/hostname b/usr/bin/hostname
new file mode 100644
index 0000000..768edcd
--- /dev/null
+++ b/usr/bin/hostname
@@ -0,0 +1,32 @@
+#!/bin/bash 
+
+LOGFILE="/var/log/hostname.log"
+
+# Function to read the hostname from the DHCP lease file
+get_hostname() {
+    sudo cat /var/lib/dhcp/* | grep -a "option host-name" | tail -1 | \
+    awk -F '"' '{print $2}'
+}
+
+# Function to update /etc/hosts with the new hostname
+update_hosts() {
+    local hostname="$1"
+    # Replace the second line with the new hostname
+    sudo sed -i "2s/.*/127.0.1.1   ${hostname}/" /etc/hosts
+    echo "Updated /etc/hosts with hostname: $hostname" >> $LOGFILE
+}
+
+# Read the hostname from DHCP
+hostname=$(get_hostname)
+
+if [ -n "$hostname" ]; then
+    update_hosts "$hostname"
+else
+    echo "No hostname found." >> $LOGFILE
+fi
+
+# Log completion
+echo "Hostname update script completed." >> $LOGFILE
+
+#  Version 1.0:
+#  Created 2024 by Tim Eertmoed, Christian Hampp @ WiS IT-Solutions GmbH, Germany to work on Raspian as custom pxe init script.