#!/bin/sh

# Copyright 2005-2012  Patrick J. Volkerding, Sebeka, Minnesota, USA
# Copyright 2013  Bart van der Hall, Istanbul, TR
# 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.

PKGNAM=shadow
VERSION=${VERSION:-4.5}
BUILD=${BUILD:-1}
TAG=${TAG:-_dlack}

# Set to NO to disable pam support
SBO_PAM=${SBO_PAM:-YES}
# Set to YES to add /etc/limits file with max processes from SB_LIMITSMAX (shellbomb protection)
SBO_LIMITS=${SB_LIMITS:-YES}
SBO_LIMITSMAX=${SB_LIMITSMAX:-400}
# Set to YES to enable SHA512 encrypt method (more CPU intensive)
SBO_SHA512=${SB_SHA512:-YES}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

NUMJOBS=${NUMJOBS:--j6}

CWD=$(pwd)
TMP=${TMP:-/tmp/dlackware}
PKG=$TMP/package-$PKGNAM
OUTPUT=${OUTPUT:-/var/cache/dlackware}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf shadow-$VERSION
tar xvf $CWD/shadow-$VERSION.tar.?z* || exit 1
cd shadow-$VERSION

SBO_PAMD_DIR=${CWD}/pamd

# Relax the restrictions on "su -c" when it is used to become root.
# It's not likely that root is going to try to inject commands back into
# the user's shell to hack it, and the unnecessary restriction is causing
# breakage:
cat $CWD/shadow.CVE-2005-4890.relax.diff | patch -p1 --verbose || exit 1


chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;

# add the pam_ck_connector 
# and not requiring users to be in the 'wheel' group, in order to use `su`
cat $CWD/pamd_settings.patch | patch -p2

unset SBO_AUTOGEN
if [ -r ${CWD}/apply-patches.sh ]; then
  . ${CWD}/apply-patches.sh
fi

sed -i -e '/^GROUP=/s|=.*$|=100|g' etc/useradd || exit 1

sed -i -e '/<stdio.h>/a#include <stdarg.h>' libmisc/copydir.c || exit 1

if [ "${SBO_LIMITS}" = "YES" ] && [ "${SBO_PAM}" != "YES" ] ; then
  echo >> etc/limits || exit 1
  echo '# Limit user process number to prevent shellbomb' >> etc/limits || exit 1
  echo "* U ${SBO_LIMITSMAX}" >> etc/limits || exit 1
fi

rm -f etc/login.defs
cp -f ${CWD}/login.defs etc/login.defs || exit 1

if [ "${SBO_SHA512}" = "YES" ] || [ "${SBO_PAM}" = "YES" ] ;then
  sed -i -e '/^ENCRYPT_METHOD /s|^.*$|ENCRYPT_METHOD SHA512|g' etc/login.defs || exit 1
fi

unset SBO_PAMOPTS
if [ "${SBO_PAM}" = "YES" ] ;then
  SBO_PAMOPTS='--with-libpam --with-libcrack'
else
  SBO_PAMOPTS='--without-libpam --without-libcrack'
fi

#rm -f po/*.gmo
#rm -f po/stamp-po

if [ "${SBO_AUTOGEN}" = "YES" ] ;then
  autoreconf -ivf || exit $?
fi


CFLAGS="${SLKCFLAGS} -fpie" \
CXXFLAGS="${SLKCFLAGS}" \
LDFLAGS="-pie -Wl,-z,relro -Wl,-z,now ${LDFLAGS}" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --mandir=/usr/man \
  --docdir=/usr/doc/shadow-$VERSION \
  --disable-shared \
  ${SBO_PAMOPTS} \
  --without-selinux \
  --without-audit \
  --with-group-name-max-length=32 \
  --build=$ARCH-slackware-linux

make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# Fix user group = 100:
cat $CWD/useradd > $PKG/etc/default/useradd

# /bin/groups is provided by coreutils.
rm -f $PKG/bin/groups
find $PKG -name groups.1 -exec rm {} \;

chmod 0750 ${PKG}/usr/sbin/{user,group}*

( cd ${PKG}/etc || exit 1
  for file in login.defs default/useradd ; do
    mv ${file} ${file}.new || exit 1
  done
  if [ "${SBO_PAM}" != "YES" ] ;then
    for file in limits login.access ; do
      mv ${file} ${file}.new || exit 1
    done
  fi
) || exit 1

chmod 0600 ${PKG}/etc/default/useradd*

# Add the friendly 'adduser' script:
cat $CWD/adduser > $PKG/usr/sbin/adduser
chmod 0755 $PKG/usr/sbin/adduser

# Add sulogin to the package:
cp -a src/sulogin $PKG/sbin
( cd $PKG/bin ; ln -s ../sbin/sulogin )

# Add the empty faillog log file:
mkdir -p $PKG/var/log
touch $PKG/var/log/faillog.new

# Put some stuff back in "old" locations and make symlinks for compat
( cd $PKG/usr/bin
  mv faillog ../sbin
  mv lastlog ../sbin
  ln -s ../sbin/faillog
  ln -s ../sbin/lastlog
)

# Use 4711 rather than 4755 permissions where setuid root is required:
find $PKG -type f -perm 4755 -exec chmod 4711 "{}" \;

mkdir -p $PKG/etc/pam.d/

if [ "${SBO_PAM}" = "YES" ] ; then
  for pamd in login passwd remote su su-l system-auth other; do
     cp -f ${SBO_PAMD_DIR}/${pamd}.pamd \
      ${PKG}/etc/pam.d/${pamd} || exit 1
  done
  for pamd in chfn chsh ; do
    cp -f ${SBO_PAMD_DIR}/chsh-chfn.pamd \
      ${PKG}/etc/pam.d/${pamd} || exit 1
  done

  for opt in \
    CHFN_AUTH \
    CRACKLIB_DICTPATH \
    ENV_HZ \
    ENVIRON_FILE \
    FAILLOG_ENAB \
    FTMP_FILE \
    LASTLOG_ENAB \
    MAIL_CHECK_ENAB \
    MOTD_FILE \
    NOLOGINS_FILE \
    OBSCURE_CHECKS_ENAB \
    PASS_ALWAYS_WARN \
    PASS_CHANGE_TRIES \
    PASS_MIN_LEN \
    PORTTIME_CHECKS_ENAB \
    QUOTAS_ENAB \
    SU_WHEEL_ONLY
  do
    sed -i -r -e "/^#?${opt}/s|^|#|g" ${PKG}/etc/login.defs.new || exit 1
  done
fi

# Compress and if needed symlink the man pages:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

mkdir -p $PKG/usr/doc/shadow-$VERSION
cp -a \
  COPYING* NEWS README* TODO doc/{README*,HOWTO,WISHLIST,*.txt} \
  $PKG/usr/doc/shadow-$VERSION

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

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

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PKGNAM-$VERSION-$ARCH-$BUILD$TAG.txz