#!/bin/sh

# Slackware build script for opensmtpd

# Copyright 2013-2014  Robby Workman, Northport, Alabama, USA
# Copyright 2015-2020  Richard Narron, California, 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.

PRGNAM=opensmtpd
VERSION=${VERSION:-6.0.3p1}
BUILD=${BUILD:-5}
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}

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

bailout() {
  printf "\nYou must have smtpd and smtpq users and groups on the system \n"
  printf "for privilege separation - something like this should suffice: \n"
  printf "\tgroupadd -g 270 smtpd \n"
  printf "\tuseradd -u 270 -g 270 -r -s /bin/false -d /var/empty smtpd \n"
  printf "\tgroupadd -g 271 smtpq \n"
  printf "\tuseradd -u 271 -g 271 -r -s /bin/false -d /var/empty smtpq \n\n"
  exit 1
}

if ! getent group smtpd 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent passwd smtpd 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent passwd smtpq 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent group smtpq 1>/dev/null 2>/dev/null ; then
  bailout
fi

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 {} \;

# fix reply buffer overflow
cat $CWD/openbsd64-020-smtpd.patch | patch -p1

# fix tls downgrade
cat $CWD/openbsd65-029-smptd-tls.patch | patch -p1

# fix exec
cat $CWD/openbsd66-019-smtpd-exec.patch | patch -p1

# check null from crypt function
cat $CWD/fix-crash-on-authentication.patch | patch -p1

CFLAGS="$SLKCFLAGS -D_DEFAULT_SOURCE" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc/opensmtpd \
  --localstatedir=/var \
  --with-path-socket=/var/run \
  --mandir=/usr/man \
  --with-mantype=doc \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --without-rpath \
  --with-path-mbox=/var/spool/mail \
  --with-user-smtpd=smtpd \
  --with-user-queue=smtpq \
  --with-group-queue=smtpq \
  --with-path-CAfile=/etc/ssl/certs/ca-certificates.crt \
  --with-table-db \
  --build=$ARCH-slackware-linux

make
make install DESTDIR=$PKG

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | \
  grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

# bug fix thanks to Ed Rozenberg: change group for smtpctl
chgrp smtpq $PKG/usr/sbin/smtpctl
chmod 2555  $PKG/usr/sbin/smtpctl

# Create nice compat symlinks for sendmail
rm -f $PKG/usr/bin/sendmail $PKG/usr/sbin/sendmail
ln -s smtpctl $PKG/usr/sbin/sendmail
ln -s ../sbin/sendmail $PKG/usr/bin/sendmail

rm -f $PKG/usr/sbin/mailq $PKG/usr/sbin/newaliases $PKG/usr/sbin/makemap
ln -s smtpctl $PKG/usr/sbin/mailq
ln -s smtpctl $PKG/usr/sbin/newaliases
ln -s smtpctl $PKG/usr/sbin/makemap

mkdir -p $PKG/etc/rc.d
cat $CWD/rc.opensmtpd > $PKG/etc/rc.d/rc.opensmtpd.new

# Don't clobber the config file
mv $PKG/etc/opensmtpd/smtpd.conf $PKG/etc/opensmtpd/smtpd.conf.new
# and reflect the correct path to aliases file
sed -i "s,/etc/mail/,/etc/opensmtpd/,g" $PKG/etc/opensmtpd/smtpd.conf.new

# Create (but don't clobber) the aliases file
cat $CWD/aliases > $PKG/etc/opensmtpd/aliases.new

# Create some other required directories with proper ownership and permissions
mkdir -p $PKG/var/spool/smtpd/corrupt $PKG/var/spool/smtpd/incoming \
         $PKG/var/spool/smtpd/offline $PKG/var/spool/smtpd/purge \
         $PKG/var/spool/smtpd/queue $PKG/var/spool/smtpd/temporary
chown root:smtpq $PKG/var/spool/smtpd/offline
chown smtpq:root $PKG/var/spool/smtpd/corrupt $PKG/var/spool/smtpd/incoming \
                 $PKG/var/spool/smtpd/purge $PKG/var/spool/smtpd/queue \
                 $PKG/var/spool/smtpd/temporary
chmod 0711 $PKG/var/spool/smtpd
chmod 0700 $PKG/var/spool/smtpd/corrupt $PKG/var/spool/smtpd/incoming \
           $PKG/var/spool/smtpd/queue $PKG/var/spool/smtpd/temporary
chmod 0770 $PKG/var/spool/smtpd/offline
chmod 0700 $PKG/var/spool/smtpd/purge

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a INSTALL LICENSE README.md THANKS $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/README             > $PKG/usr/doc/$PRGNAM-$VERSION/README.slackware
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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 -p -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}