#!/bin/bash

# kmodtool - Helper script for building kernel module RPMs

#            An original version appeared in Fedora. This version is

#            generally called only by the %kernel_module_package RPM macro

#            during the process of building Driver Update Packages (which

#            are also known as "kmods" in the Fedora community).

#

# Copyright (c) 2003-2010 Ville Skyttä <ville.skytta@iki.fi>,

#                         Thorsten Leemhuis <fedora@leemhuis.info>

#                         Jon Masters <jcm@redhat.com>

#

# Permission is hereby granted, free of charge, to any person obtaining

# a copy of this software and associated documentation files (the

# "Software"), to deal in the Software without restriction, including

# without limitation the rights to use, copy, modify, merge, publish,

# distribute, sublicense, and/or sell copies of the Software, and to

# permit persons to whom the Software is furnished to do so, subject to

# the following conditions:

#

# The above copyright notice and this permission notice shall be

# included in all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# Changelog:

#

#            2010/07/28 - Add fixes for filelists in line with LF standard

#			- Remove now defunct "framepointer" kernel variant

#			- Change version to "rhel6-rh2" as a consequence.

#

#            2010/01/10 - Simplified for RHEL6. We are working on upstream

#                         moving to a newer format and in any case do not

#                         need to retain support for really old systems.

shopt -s extglob

myprog="kmodtool"

myver="0.10.10_rhel9"

knownvariants=@(debug|kdump|zfcpdump)

kmod_name=

kver=

verrel=

variant=

get_verrel ()

{

  verrel=${1:-$(uname -r)}

  verrel=${verrel/%[.+]$knownvariants/}

}

print_verrel ()

{

  get_verrel "$@"

  echo "${verrel}"

}

get_variant ()

{

  get_verrel "$@"

  variant=${1:-$(uname -r)}

  variant=${variant/#$verrel?(.+)/}

  variant=${variant:-'""'}

}

print_variant ()

{

  get_variant $@

  echo "${variant}"

}

# Detect flavor separator character. We have to do that due to

# a systemd-tailored patch for kernel spec[1][2] introduced in Fedora and then

# imported in RHEL 8 that broke all OOT kmod infrastructure for the flavored

# kernels.

#

# [1] https://lists.fedoraproject.org/pipermail/kernel/2013-June/004262.html

# [2] https://src.fedoraproject.org/rpms/kernel/c/faf25207dc86666a611c45ae3ffaf385c170bd2a

#

# $1 - kver

# $2 - variant

get_variant_char ()

{

  variant="$2"

  [ "$variant" != "default" ] || variant=""

  get_verrel "$1"

  variant_char=""

  [ -n "$variant" ] || return 0

  # We expect that the flavored kernel is already installed in the buildroot

  variant_char="+"

  [ -e "/usr/src/kernels/${verrel}+${variant}" ] && return 0

  variant_char="."

}

print_variant_char ()

{

  get_variant_char "$@"

  echo "${variant_char}"

}

print_kernel_source ()

{

  get_variant_char "$@"

  echo "/usr/src/kernels/${verrel}${variant_char}${variant}"

}

get_filelist() {

	local IFS=$'\n'

	filelist=($(cat))

	if [ ${#filelist[@]} -gt 0 ];

	then

		for ((n = 0; n < ${#filelist[@]}; n++));

		do

			line="${filelist[n]}"

			line=$(echo "$line" \

				| sed -e "s/%verrel/$verrel/g" \

				| sed -e "s/%variant/$variant/g" \

				| sed -e "s/%dashvariant/$dashvariant/g" \

				| sed -e "s/%dotvariant/$dotvariant/g" \

				| sed -e "s/\+%1/$dotvariant/g" \

				| sed -e "s/\.%1/$dotvariant/g" \

				| sed -e "s/\-%1/$dotvariant/g" \

				| sed -e "s/%2/$verrel/g")

			echo "$line"

		done

	else

		echo "%defattr(644,root,root,755)"

		echo "/lib/modules/${verrel}${dotvariant}"

	fi

}

get_rpmtemplate ()

{

    local variant="${1}"

    get_variant_char "${verrel}" "${variant}"

    local dashvariant="${variant:+-${variant}}"

    local dotvariant="${variant:+${variant_char}${variant}}"

    echo "%package       -n kmod-${kmod_name}${dashvariant}"

    if [ -z "$kmod_provides_summary" ]; then

        echo "Summary:          ${kmod_name} kernel module(s)"

    fi

    if [ -z "$kmod_provides_group" ]; then

        echo "Group:            System Environment/Kernel"

    fi

    if [ ! -z "$kmod_version" ]; then

        echo "Version: %{kmod_version}"

    fi

    if [ ! -z "$kmod_release" ]; then

        echo "Release: %{kmod_release}"

    fi

    cat <

Provides:         kernel-modules >= ${verrel}${dotvariant}

Provides:         kernel${dashvariant}-modules >= ${verrel}

Provides:         ${kmod_name}-kmod = %{?epoch:%{epoch}:}%{version}-%{release}

Requires(post):   /usr/sbin/depmod

Requires(postun): /usr/sbin/depmod

Requires(post):   /usr/sbin/weak-modules

Requires(postun): /usr/sbin/weak-modules

EOF

    if [ "yes" != "$nobuildreqs" ]

    then

        cat <

BuildRequires:    kernel${dashvariant}-devel

BuildRequires:    kernel-abi-stablelists

BuildRequires:    redhat-rpm-config kernel-rpm-macros

BuildRequires:    elfutils-libelf-devel kmod

EOF

    fi

    if [ "" != "$override_preamble" ]

    then

        cat "$override_preamble"

    fi

cat <

%description   -n kmod-${kmod_name}${dashvariant}

This package provides the ${kmod_name} kernel modules built for

the Linux kernel ${verrel}${dotvariant} for the %{_target_cpu}

family of processors.

EOF

##############################################################################

## The following are not part of this script directly, they are scripts     ##

## that will be executed by RPM during various stages of package processing ##

##############################################################################

cat <

%post          -n kmod-${kmod_name}${dashvariant}

if [ -e "/boot/System.map-${verrel}${dotvariant}" ]; then

    /usr/sbin/depmod -aeF "/boot/System.map-${verrel}${dotvariant}" "${verrel}${dotvariant}" > /dev/null || :

fi

modules=( \$(find /lib/modules/${verrel}${dotvariant}/extra/${kmod_name} | grep -E '\.ko(\.gz|\.bz2|\.xz|\.zst)?$') )

if [ -x "/usr/sbin/weak-modules" ]; then

    printf '%s\n' "\${modules[@]}" \

    | /usr/sbin/weak-modules --add-modules

fi

EOF

cat <

%preun         -n kmod-${kmod_name}${dashvariant}

rpm -ql kmod-${kmod_name}${dashvariant}-%{kmod_version}-%{kmod_release}.$(arch) | grep -E '\.ko(\.gz|\.bz2|\.xz|\.zst)?$' > /var/run/rpm-kmod-${kmod_name}${dashvariant}-modules

EOF

cat <

%postun        -n kmod-${kmod_name}${dashvariant}

if [ -e "/boot/System.map-${verrel}${dotvariant}" ]; then

    /usr/sbin/depmod -aeF "/boot/System.map-${verrel}${dotvariant}" "${verrel}${dotvariant}" > /dev/null || :

fi

modules=( \$(cat /var/run/rpm-kmod-${kmod_name}${dashvariant}-modules) )

rm /var/run/rpm-kmod-${kmod_name}${dashvariant}-modules

if [ -x "/usr/sbin/weak-modules" ]; then

    printf '%s\n' "\${modules[@]}" \

    | /usr/sbin/weak-modules --remove-modules

fi

EOF

echo "%files         -n kmod-${kmod_name}${dashvariant}"

if [ "" == "$override_filelist" ];

then

    echo "%defattr(644,root,root,755)"

    echo "/lib/modules/${verrel}${dotvariant}"

else

    cat "$override_filelist" | get_filelist

fi

}

print_rpmtemplate ()

{

  kmod_name="${1}"

  shift

  kver="${1}"

  get_verrel "${1}"

  shift

  if [ -z "${kmod_name}" ] ; then

    echo "Please provide the kmodule-name as first parameter." >&2

    exit 2

  elif [ -z "${kver}" ] ; then

    echo "Please provide the kver as second parameter." >&2

    exit 2

  elif [ -z "${verrel}" ] ; then

    echo "Couldn't find out the verrel." >&2

    exit 2

  fi

  for variant in "$@" ; do

      if [ "default" == "$variant" ];

      then

            get_rpmtemplate ""

      else

            get_rpmtemplate "${variant}"

      fi

  done

}

usage ()

{

  cat <

You called: ${invocation}

Usage: ${myprog} <command> <option>+

 Commands:

  verrel <uname>

    - Get "base" version-release.

  variant <uname>

    - Get variant from uname.

  variant_char <uname> <variant>

    - Get kernel variant separator character.

  kernel_source <uname> <variant>

    - Get path to kernel source directory.

  rpmtemplate <mainpgkname> <uname> <variants>

    - Return a template for use in a source RPM

  version

    - Output version number and exit.

EOF

}

invocation="$(basename ${0}) $@"

while [ "${1}" ] ; do

  case "${1}" in

    verrel)

      shift

      print_verrel "$@"

      exit $?

      ;;

    variant)

      shift

      print_variant "$@"

      exit $?

      ;;

    variant_char)

      shift

      print_variant_char "$@"

      exit $?

      ;;

    kernel_source)

      shift

      print_kernel_source "$@"

      exit $?

      ;;

    rpmtemplate)

      shift

      print_rpmtemplate "$@"

      exit $?

      ;;

    version)

      echo "${myprog} ${myver}"

      exit 0

      ;;

    *)

      echo "Error: Unknown option '${1}'." >&2

      usage >&2

      exit 2

      ;;

  esac

done

# Local variables:

# mode: sh

# sh-indentation: 2

# indent-tabs-mode: nil

# End:

# ex: ts=2 sw=2 et