#!/bin/bash

# Slackware build script for chkrootkit

# Copyright 2007-2009  Michiel van Wessem, Manchester, United Kingdom
# 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.

# Updated by Emmanuel N. Millan 2020-2021

PRGNAM=chkrootkit
VERSION=${VERSION:-0.54}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

if [ "$ARCH" = "i586" ]; then
    sed -i 's#-DHAVE_LASTLOG_H#-O2 -march=i586 -mtune=i686#' Makefile
    LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
    sed -i 's#-DHAVE_LASTLOG_H#-O2 -march=i686 -mtune=i686#' Makefile
    LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
    sed -i 's#-DHAVE_LASTLOG_H#-O2 -fPIC#' Makefile
    LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

SCFLAGS="$SLKCFLAGS" make
# Lets make our own fancy make install
DESTDIR=$PKG/usr/lib${LIBDIRSUFFIX}/chkrootkit/bin
mkdir -p $DESTDIR
for BINPRG in $(ls -l | grep "rwx\|\-x" | grep -v "\." | awk '{ print $9 }'); do
    install -m 0755 $BINPRG $DESTDIR
done

# Thanks to Erik Jan Tromp (alphageek) for the suggestion on this
# Install a wrapper script
###sbolint off
mkdir -p $PKG/usr/sbin
cat << EOF > $PKG/usr/sbin/chkrootkit
#!/bin/sh
PRGNAM=chkrootkit
PRGDIR=/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/bin
cd \$PRGDIR && exec ./$PRGNAM \$*
EOF
chmod 0755 $PKG/usr/sbin/$PRGNAM
###sbolint on

find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a ACKNOWLEDGMENTS COPYRIGHT README* chkrootkit.lsm \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}