#!/bin/sh

# Copyright 2008, 2009  Patrick J. Volkerding, Sebeka, MN, 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.


VERSION=${VERSION:-3.2.3}
ARCH=${ARCH:-i486}
BUILD=${BUILD:-1}

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

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

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf dhcpcd-$VERSION
tar xvf $CWD/dhcpcd-$VERSION.tar.bz2 || exit 1
cd dhcpcd-$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 {} \;

# This changes the default locations where *.pid and other files are
# written - instead of various locations, use /etc/dhcpc
# The latter directory was long traditional, and (more importantly) 
# you can't be sure that /var is mounted yet when dhcpcd is invoked.
zcat $CWD/patches/config.h.diff.gz | patch -p1 || exit 1

# Fixup the sample dhcpcd.sh script to reflect our changes
zcat $CWD/patches/dhcpcd.sh.diff.gz | patch -p1 || exit 1

# Fix a typo in the manpage
zcat $CWD/patches/dhcpcd.8.in.diff.gz | patch -p1 || exit 1

# Disable zeroconf support
# I'm not sure if this is necessary, to be honest.  If we do this though,
# I think we'll want to edit the man page to remove references to it.
#sed -i 's%#define ENABLE_IPV4LL%#undef ENABLE_IPV4LL%' config.h

# Fix segfaulting on x86_64. Apparently i?86 is more forgiving
#zcat $CWD/dhcpcd.vararg.diff.gz | patch -p1 --verbose || exit 1

CFLAGS="$SLKCFLAGS" \
  make INFODIR=/etc/dhcpc || exit 1

# We'll install this manually, as the only thing "make install" actually
# installs is the executable and the man page, and the man page goes to
# the wrong place :-)
mkdir -p $PKG/sbin
cp -a dhcpcd $PKG/sbin

mkdir -p $PKG/usr/man/man8
gzip -9c dhcpcd.8 > $PKG/usr/man/man8/dhcpcd.8.gz

# This script (or its equivalent) has been installed non-executable for 
# several dhcpcd releases leading me to believe this is intentional on the 
# part of the developers.  Indeed, the script is called a "sample" in the 
# included comments, and there's been at least one security issue related 
# to its use in the past, so it's probably a safer bet to not install it so 
# that it works "out of the box".  However, making it non-executable is not 
# the best solution for this as it leads to error messages in the system 
# logs which I hear about from time to time.  Instead, we'll make it 
# executable, but will give it a suffix of -sample so that dhcpcd won't 
# attempt to run it unless the admin specifically configure it to do so.
# As far as I can tell it does nothing more than add some extra verbosity 
# to the logs anyway, and rc.inet1 already does that.  There's really no
# need that I can see to enable the script.
mkdir -p $PKG/etc/dhcpc
cp -a dhcpcd.sh $PKG/etc/dhcpc/dhcpcd.sh-sample
chmod 755 $PKG/etc/dhcpc/dhcpcd.sh-sample

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

mkdir -p $PKG/usr/doc/dhcpcd-$VERSION
cp -a README $PKG/usr/doc/dhcpcd-$VERSION
zcat $CWD/COPYRIGHT.gz > $PKG/usr/doc/dhcpcd-$VERSION/COPYRIGHT

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

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