#!/bin/sh
 
# Copyright 2010  Vincent Batts, vbatts@hashbangbash.com
# Copyright 2010, 2011  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.

# Call the church police!  ;-)
SRCNAM=Linux-PAM
PKGNAM=pam
PAMRHVER=${PAMRHVER:-$(echo pam-redhat-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1,2 -d - | rev)}
VERSION=${VERSION:-$(echo $SRCNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

NUMJOBS=${NUMJOBS:--j7}

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.?z* || exit 1
cd $SRCNAM-$VERSION || exit 1

# Better take the Red Hat added modules and patches, because that's very
# likely to be the most standard as far as PAM goes:
tar xvf $CWD/pam-redhat-$PAMRHVER.tar.?z* || exit 1
mv pam-redhat-$PAMRHVER/{CHANGELOG*,COPYING*,README*} .
mv pam-redhat-$PAMRHVER/* modules
zcat $CWD/patches/pam-1.0.90-redhat-modules.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.0.91-std-noclose.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.0-notally.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.1-faillock.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.2-noflex.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-faillock-screensaver.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-limits-nosetreuid.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-limits-range.patch.gz | patch -p0 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-nouserenv.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-pwhistory-incomplete.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/patches/pam-1.1.3-securetty-console.patch.gz | patch -p0 --verbose || exit 1

# Churn some patches from .am -> .in:
autoreconf -f

# Make these 2 man pages or the build falls over later on:
( cd modules/pam_faillock
  xmlto man faillock.8.xml
  xmlto man pam_faillock.8.xml
)

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 {} \;

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/ \
  --libdir=/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --includedir=/usr/include/security \
  --datarootdir=/usr/share \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --enable-read-both-confs \
  --disable-prelude \
  --disable-selinux \
  --build=$ARCH-slackware-linux || exit 1

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

# this is a pam helper, that can only be called from pam
chown root:shadow $PKG/sbin/unix_chkpwd
chmod g+s $PKG/sbin/unix_chkpwd

# Strip binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

# 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 $PKG/usr/doc/$PKGNAM-$VERSION
cp -a \
  AUTHORS COPYING* Copyright NEWS README* \
  $PKG/usr/doc/$PKGNAM-$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 $DOCSDIR/ChangeLog
fi
if [ -r CHANGELOG ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat CHANGELOG | head -n 1000 > $DOCSDIR/CHANGELOG
  touch -r CHANGELOG $DOCSDIR/CHANGELOG
fi
rm -f $PKG/usr/doc/$PKGNAM-$VERSION/index.html

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

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