#!/bin/sh

# Slackware build script for opensmtpd

# Copyright 2013  Robby Workman, Northport, Alabama, 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=${VERSION:-5.3.3p1}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

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

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

bailout() {
  printf "\nYou must have smtpd, smtpf, smtpl, and smtpq users on the system \n"
  printf "for privilege separation - something like this should suffice: \n"
  printf "\tuseradd -u 270 -g 0 -r -s /bin/false -d /var/empty smtpd \n"
  printf "\tuseradd -u 271 -g 0 -r -s /bin/false -d /var/empty smtpf \n"
  printf "\tuseradd -u 272 -g 0 -r -s /bin/false -d /var/empty smtpl \n"
  printf "\tuseradd -u 273 -g 0 -r -s /bin/false -d /var/empty smtpq \n\n"
  exit 1
}

if ! getent passwd smtpd 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent passwd smtpf 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent passwd smtpl 1>/dev/null 2>/dev/null ; then
  bailout
elif ! getent passwd 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 . \
 \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \;

./bootstrap

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc/opensmtpd \
  --localstatedir=/var \
  --with-sock-dir=/var/run \
  --mandir=/usr/man \
  --with-mantype=doc \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --with-maildir=/var/spool/mail \
  --with-privsep-user=smtpd \
  --with-filter-user=smtpf \
  --with-queue-user=smtpq \
  --with-lookup-user=smtpl \
  --build=$ARCH-slackware-linux

# the "smtpl" user won't actually be used until 5.4, but it's harmless
# to go ahead and have it present - I'm less likely to forget later :)

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

# Create a nice compat symlink for sendmail
ln -s smtpctl $PKG/usr/sbin/sendmail

# Replace some hardlinks with symlinks
rm -f $PKG/usr/bin/{newaliases,mailq} $PKG/usr/libexec/opensmtpd/makemap
ln -s ../sbin/makemap $PKG/usr/bin/newaliases
ln -s ../sbin/smtpctl $PKG/usr/bin/mailq
ln -s ../../sbin/makemap $PKG/usr/libexec/opensmtpd/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

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

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 examples \
  $PKG/usr/doc/$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
cat $CWD/doinst.sh > $PKG/install/doinst.sh

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