#!/bin/bash
ulimit -s unlimited
shopt -s extglob

# libcgroup.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2011-2025  Patrick J. Volkerding, Sebeka, Minnesota, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Record toolchain & other info for the build log:
slackbuildinfo

# Paths to skeleton port's source & real Slackware source tree:
slackset_var_cwds

# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Extract source:
tar xf $CWD/$PKGNAM-$VERSION.tar.!(*sign|*asc|*sig)
cd $PKGNAM-$VERSION || failextract
slackhousekeeping

# Label cgred.conf properly in the first line:
cat $CWD/cgred.conf.no.sysconfig.patch | patch -p1 --verbose || exit 1

# Configure:
slack_autotoolsprep
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
   --sysconfdir=/etc \
   --localstatedir=/var \
   --docdir=/usr/doc/$PKGNAM-$VERSION \
   --mandir=/usr/man \
   --infodir=/usr/info \
   --bindir=/usr/bin \
   --sbindir=/usr/sbin \
   --disable-static \
   --enable-pam \
   --enable-pam-module-dir=/lib${LIBDIRSUFFIX}/security \
   --enable-systemd=no \
   --build=${SLK_ARCH_BUILD} || failconfig

# Build:
make $NUMJOBS || make || failmake

# Install into package:
make install DESTDIR=$PKG || failinstall

# Even though we do not use systemd, breakage results if this header file
# does not exist. And the PRs to remove it from libcgroup.h cause this package
# to not even build.
#
# As a first attempt, let's just make it an empty file to see if that fixes
# downstream issues:
if [ ! -e $PKG/usr/include/libcgroup/systemd.h ]; then
  touch $PKG/usr/include/libcgroup/systemd.h
fi

# This directory is needed by cgrulesengd:
mkdir -p $PKG/etc/cgconfig.d

# Install init scripts. These now test for things like LSB and sysconfig and
# don't try to use them if they don't exist. Therefore we don't need to patch
# these for the reasons we did before. However, we might need patches to
# properly support cgroups v2. But first things first...
mkdir -p $PKG/etc/rc.d
cp -a scripts/init.d/cgconfig $PKG/etc/rc.d/rc.cgconfig.new
cp -a scripts/init.d/cgred $PKG/etc/rc.d/rc.cgred.new
chmod 644 $PKG/etc/rc.d/*

# Install sample config files:
( cd samples/config
  for conffile in cgconfig.conf cgred.conf cgrules.conf cgsnapshot_allowlist.conf cgsnapshot_denylist.conf ; do
    cp -a $conffile $PKG/etc/${conffile}.new
  done
)

# Add a default file to signal to rc.S which cgroups hierarchy to mount:
mkdir -p $PKG/etc/default
install -vpm644 $CWD/cgroups.default $PKG/etc/default/cgroups.new

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION
cp -a \
  CONTRIBUTING* COPYING* INSTALL* README* SECURITY* \
  samples \
  $PKG/usr/doc/${PKGNAM}-$VERSION
changelogliposuction ChangeLog $PKGNAM $VERSION # Trim down a "ChangeLog" file
find $PKG/usr/doc/${PKGNAM}-$VERSION -name "Makefile*" | xargs rm
find $PKG/usr/doc/${PKGNAM}-$VERSION -name ".deps" | xargs rm -r

# Apply generic Slackware packaging policies:
cd $PKG
slackstripall   # strip all .a archives and all ELFs
slack_delete_lafiles # delete usr/lib{,64}/*.la
slackgzpages -i # compress man & info pages and delete usr/info/dir
slackslack      # chown -R root:root, chmod -R og-w, slackchown, slack644docs

# cgexec doesn't need to be setuid root -- setgid cgred is sufficient:
chown root:cgred $PKG/usr/bin/cgexec
chmod 2755 $PKG/usr/bin/cgexec

slackdesc       # install slack-desc and doinst.sh
slackmp         # run makepkg -l y -c n

# Perform any final checks on the package:
cd $PKG
slackhlinks     # search for any hard links