From d00996062e973d60accf35604317501fe91c8569 Mon Sep 17 00:00:00 2001
From: Kris Lamoureux <kris@lamoureux.io>
Date: Fri, 14 Jan 2022 01:54:13 -0500
Subject: [PATCH] Build and install module with DKMS

---
 build.sh        | 23 +++++++++++++++++++----
 dkms.conf       |  5 +++++
 helloworld.conf |  3 +++
 3 files changed, 27 insertions(+), 4 deletions(-)
 create mode 100644 dkms.conf
 create mode 100644 helloworld.conf

diff --git a/build.sh b/build.sh
index 594558d..c2ebe8e 100644
--- a/build.sh
+++ b/build.sh
@@ -1,13 +1,28 @@
 #!/bin/bash
 
+VERSION="0.1"
+
+# Install build prerequisites
 export DEBIAN_FRONTEND=noninteractive
 apt-get update
-apt-get install build-essential linux-headers-$(uname -r) -y
+apt-get install -y dkms build-essential linux-headers-$(uname -r)
 
+# Place source and configuration files on the system
 cd /vagrant
-make
-modinfo helloworld.ko
-insmod helloworld.ko
+mkdir /usr/src/helloworld-$VERSION
+cp Makefile /usr/src/helloworld-$VERSION/Makefile
+cp helloworld.c /usr/src/helloworld-$VERSION/helloworld.c
+cp dkms.conf /usr/src/helloworld-$VERSION/dkms.conf
+cp helloworld.conf /etc/modules-load.d/helloworld.conf
+
+# Build and install kernel module with DKMS
+dkms add -m helloworld -v $VERSION
+dkms build -m helloworld -v $VERSION
+dkms install -m helloworld -v $VERSION
+
+# Load module and show details about it
+modprobe helloworld
+modinfo helloworld
 cat /proc/modules | grep helloworld
 rmmod helloworld
 cat /var/log/messages | grep helloworld
diff --git a/dkms.conf b/dkms.conf
new file mode 100644
index 0000000..6fa67ad
--- /dev/null
+++ b/dkms.conf
@@ -0,0 +1,5 @@
+PACKAGE_NAME="helloworld"
+PACKAGE_VERSION="0.1"
+BUILT_MODULE_NAME[0]="helloworld"
+DEST_MODULE_LOCATION[0]="/kernel/drivers/helloworld/"
+AUTOINSTALL="yes"
diff --git a/helloworld.conf b/helloworld.conf
new file mode 100644
index 0000000..1946156
--- /dev/null
+++ b/helloworld.conf
@@ -0,0 +1,3 @@
+# A kernel module that should be loaded at boot time
+# /etc/modules-load.d/helloworld.conf
+helloworld