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#!/bin/bash

# Copyright 2005-2020  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.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=shadow
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.xz | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-4}

# 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

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

TMP=${TMP:-/tmp}
PKG=$TMP/package-shadow

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf shadow-$VERSION
tar xvf $CWD/shadow-$VERSION.tar.xz || exit 1
cd shadow-$VERSION

# Choose correct options depending on whether PAM is installed:
if [ -L /lib${LIBDIRSUFFIX}/libpam.so.? ]; then
  PAM_OPTIONS="--with-libpam"
  unset SHADOW_OPTIONS
else
  unset PAM_OPTIONS
  SHADOW_OPTIONS="--enable-shadowgrp --without-libcrack"
fi

# Apply some patches taken from the svn trunk that
# fix some of the more serious bugs in 4.1.4.3:
for patch in $CWD/patches/*.diff.gz ; do
  zcat $patch | patch -p0 --verbose || exit 1
done

# 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:
zcat $CWD/shadow.CVE-2005-4890.relax.diff.gz | patch -p1 --verbose || exit 1

# Even if gethostname() returns the FQDN (long hostname), just display the
# short version up to the first '.' on the login prompt:
zcat $CWD/shadow.login.display.short.hostname.diff.gz | patch -p1 --verbose || exit 1

# Add missing file:
if [ ! -r man/login.defs.d/HOME_MODE.xml ]; then
  zcat $CWD/HOME_MODE.xml.gz > man/login.defs.d/HOME_MODE.xml
fi

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 {} \+

if [ ! -r ./configure ]; then
  ./autogen.sh
fi

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --sbindir=/usr/sbin \
  --bindir=/usr/bin \
  --sysconfdir=/etc \
  --mandir=/usr/man \
  --docdir=/usr/doc/shadow-$VERSION \
  --enable-man \
  --enable-subordinate-ids \
  --disable-shared \
  --with-group-name-max-length=32 \
  $SHADOW_OPTIONS \
  $PAM_OPTIONS \
  --build=$ARCH-slackware-linux

#  --enable-utmpx   # defaults to 'no'

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

# Fix user group = 100:
zcat $CWD/useradd.gz > $PKG/etc/default/useradd
mv $PKG/etc/default/useradd $PKG/etc/default/useradd.new

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

if [ ! -z "$PAM_OPTIONS" ]; then
  # Don't ship the login utilities. We'll be using the ones from util-linux:
  for file in /bin/login /bin/su /sbin/runuser /usr/bin/chfn /usr/bin/chsh \
    /usr/man/man1/chfn.1.gz /usr/man/man1/chsh.1.gz /usr/man/man1/login.1.gz \
    /usr/man/man1/runuser.1.gz /usr/man/man1/su.1.gz \
    /usr/share/bash-completion/completions/chfn \
    /usr/share/bash-completion/completions/chsh \
    /usr/share/bash-completion/completions/su ; do
    rm -f $PKG${file}
  done
  # Install config files in /etc/pam.d/. We'll use our own copies... I'm not
  # sure that I trust upstream enough to let them handle this stuff.
  rm -rf $PKG/etc/pam.d
  mkdir -p $PKG/etc/pam.d
  for file in $CWD/pam.d/* ; do
    cp -a ${file} $PKG/etc/pam.d/
  done
  # Ensure correct perms/ownership on files in /etc/pam.d/:
  chown root:root $PKG/etc/pam.d/*
  chmod 644 $PKG/etc/pam.d/*
  # Don't clobber existing config files:
  find $PKG/etc/pam.d -type f -exec mv {} {}.new \;
  # Install a login.defs with unsurprising defaults:
  rm -f $PKG/etc/login.defs
  zcat $CWD/login.defs.pam.gz > $PKG/etc/login.defs.new
else # not using PAM
  mv $PKG/etc/login.access $PKG/etc/login.access.new
  # Install a login.defs with unsurprising defaults:
  rm -f $PKG/etc/login.defs
  zcat $CWD/login.defs.shadow.gz > $PKG/etc/login.defs.new
fi

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

# I don't think this works well enough to recommend it.
#mv $PKG/etc/limits $PKG/etc/limits.new
rm -f $PKG/etc/limits

# 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

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

# 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
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

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