testing

.gitignore

@@ -1,8 +1 @@
-*.cmd
-*.ko
-*.mod*
-*.o
-.helloworld.o.d
 .vagrant
-Module.symvers
-modules.order

Vagrantfile

@@ -1,5 +1,14 @@
+VAGRANT_BOX=ENV["VAGRANT_BOX"]
+if !VAGRANT_BOX || VAGRANT_BOX == "debian"
+  VAGRANT_BOX = "debian/bullseye64"
+elsif VAGRANT_BOX == "rocky"
+  VAGRANT_BOX = "rockylinux/8"
+elsif VAGRANT_BOX == "centos"
+  VAGRANT_BOX = "centos/7"
+end
+
 Vagrant.configure("2") do |config|
-  config.vm.box = "debian/bullseye64"
+  config.vm.box = VAGRANT_BOX
   config.vm.synced_folder ".", "/vagrant"
   config.vm.network "private_network", type: "dhcp"
   config.vm.provision "shell", path: "build.sh"

build.sh

@@ -1,29 +1,117 @@
 #!/bin/bash
 
+# Initial variables
 PACKAGE="helloworld"
 VERSION="0.1"
 REVISION="1"
-BUILDDIR="$(mktemp -d)/${PACKAGE}_$VERSION-$REVISION"
+SRCDIR="/vagrant/src"
+SCRATCH="/vagrant/scratch"
+OUTDIR="$SCRATCH"
+TEMPDIR="$(mktemp -d)"
+INSTALL=0
+BUILDDIR="$TEMPDIR/${PACKAGE}_$VERSION-$REVISION"
 
-# Place sources and build package
+# Test for distribution of GNU/Linux
-mkdir -p "$BUILDDIR/usr/src/${PACKAGE}-$VERSION"
+# 0 = unknown
-mkdir -p "$BUILDDIR/etc"
+# 1 = debian
-mkdir -p "$BUILDDIR/DEBIAN"
+# 2 = rocky/centos/rhel
-cp -r /vagrant/src/usr/src/* "$BUILDDIR/usr/src/${PACKAGE}-$VERSION"
+function check_distro {
-cp -r /vagrant/src/etc/* "$BUILDDIR/etc"
+  if [ -f /etc/debian_version ]; then echo 1
-cp -r /vagrant/src/DEBIAN/* "$BUILDDIR/DEBIAN"
+  elif [ -f /etc/redhat-release ]; then echo 2
-cd "$BUILDDIR/.."
+  else echo 0
-dpkg-deb --build "${PACKAGE}_$VERSION-$REVISION"
+  fi
+}
 
-# Install package
+# Install Linux headers for current debian kernel
+function debian_headers {
   export DEBIAN_FRONTEND=noninteractive
   apt-get update
   apt-get install -y linux-headers-$(uname -r)
-apt-get install -y "./${PACKAGE}_$VERSION-$REVISION.deb"
+}
 
-# Load module and show details about it
+# Build debian package
-modinfo helloworld
+function build_deb {
-cat /proc/modules | grep helloworld
+  [ $INSTALL -eq 1 ] && debian_headers
-rmmod helloworld
+  mkdir -p "$BUILDDIR/usr/src/${PACKAGE}-$VERSION"
-modprobe helloworld
+  mkdir -p "$BUILDDIR/etc"
-cat /var/log/messages | grep helloworld
+  mkdir -p "$BUILDDIR/DEBIAN"
+  cp -r $SRCDIR/usr/src/* "$BUILDDIR/usr/src/${PACKAGE}-$VERSION"
+  cp -r $SRCDIR/etc/* "$BUILDDIR/etc"
+  cp -r $SRCDIR/DEBIAN/* "$BUILDDIR/DEBIAN"
+  cd "$TEMPDIR"
+  dpkg-deb --build "${PACKAGE}_$VERSION-$REVISION"
+}
+
+# Install Linux headers for current rhel kernel
+function rhel_headers {
+  KERNEL_VERSION="$(uname -r | rev | cut -d '.' -f 2- | rev)"
+  yum install -y kernel-headers-"$KERNEL_VERSION" kernel-devel
+}
+
+# Build redhat package
+function build_rpm {
+  EL_VER="$(uname -r | awk 'match($0,/el[0-9]/) {print substr($0, RSTART, RLENGTH)}')"
+  [ $INSTALL -eq 1 ] && rhel_headers
+  yum install -y rpm-build rpmdevtools rpmlint
+  rpmdev-setuptree
+  mkdir -p "$BUILDDIR/${PACKAGE}-${VERSION}"
+  cp -r $SRCDIR/* "$BUILDDIR/${PACKAGE}-${VERSION}"
+  rm -rf ~/rpmbuild/SOURCES/$PACKAGE-$VERSION.tar.gz
+  (cd $BUILDDIR &&
+  tar -czvf ~/rpmbuild/SOURCES/$PACKAGE-$VERSION.tar.gz $PACKAGE-$VERSION)
+  cp $SRCDIR/$PACKAGE.spec ~/rpmbuild/SPECS/
+  rpmlint ~/rpmbuild/SPECS/$PACKAGE.spec &&
+  rpmbuild -bb ~/rpmbuild/SPECS/$PACKAGE.spec
+}
+
+# Display details on module
+function info_mod {
+  modinfo "$PACKAGE"
+  cat /proc/modules | grep "$PACKAGE"
+  rmmod "$PACKAGE"
+  modprobe "$PACKAGE"
+  cat /var/log/messages | grep "$PACKAGE"
+}
+
+# Build and install (optional)
+function build_install {
+  DISTRO="$(check_distro)"
+  if [ $DISTRO -eq 0 ]; then
+    echo "ERROR: GNU/Linux distribution not detected"
+    exit -1
+  elif [ $DISTRO -eq 1 ]; then
+    build_deb
+    [ $INSTALL -eq 1 ] && apt-get install -y "./${PACKAGE}_$VERSION-$REVISION.deb"
+  elif [ $DISTRO -eq 2 ]; then
+    build_rpm
+    if [ $INSTALL -eq 1 ]; then
+      yum install -y epel-release
+      yum install -y dkms
+      rpm -i "~/rpmbuild/RPMS/noarch/$PACKAGE-$VERSION-$REVISION.$EL_VER.noarch.rpm"
+    fi
+  fi
+  info_mod
+}
+
+# Build and install helloworld module or module(s) in $SCRATCH
+function main_routine {
+  if [ ! -z "$(ls -Al $SCRATCH | grep -e ^d)" ]; then
+    cd "$SCRATCH"
+    for d in */ ; do
+      if [ -f "$(basename $d)/override.sh" ]; then
+        SRCDIR="$(pwd)/$(basename $d)"
+        . "$(basename $d)/override.sh"
+        build_install
+      fi
+    done
+  else
+    INSTALL=1
+    build_install
+  fi
+}
+
+# Program starts here unless KERNMOD_MAIN is not 0
+if [ "${KERNMOD_MAIN:-0}" -eq 0 ]; then
+  set -x
+  main_routine
+fi

scratch/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

src/helloworld.spec

@@ -0,0 +1,37 @@
+Name: helloworld
+Version: 0.1
+Release: 1%{?dist}
+Summary: hello, world
+BuildArch: noarch
+
+License: 0BSD
+Source0: %{name}-%{version}.tar.gz
+Requires: dkms
+
+%description
+hello, world example
+
+%prep
+%setup -q
+%build
+%install
+rm -rf $RPM_BUILD_ROOT
+mkdir -p $RPM_BUILD_ROOT/%{_usrsrc}/%{name}-%{version}
+mkdir -p $RPM_BUILD_ROOT/etc
+cp -r usr/src/* $RPM_BUILD_ROOT/%{_usrsrc}/%{name}-%{version}
+cp -r etc/* $RPM_BUILD_ROOT/etc
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%{_usrsrc}/%{name}-%{version}/dkms.conf
+%{_usrsrc}/%{name}-%{version}/helloworld.c
+%{_usrsrc}/%{name}-%{version}/Makefile
+/etc/modules-load.d/%{name}.conf
+
+%post
+dkms add -m %{name} -v %{version}
+dkms build -m %{name} -v %{version}
+dkms install -m %{name} -v %{version}
+modprobe %{name}