#!/bin/bash
#
# Blueprint to build sysvinit-2.85 with statically-linked init and
# sulogin utilities. 
#
# Static linking provides an extra degree of fault-tolerance by
# ensuring that init can still function even if libraries become
# corrupted or deleted.  The best fault-tolerance can be achieved
# when sysvinit-static is used with bash-static as a root shell.
#
# Source code is from ftp://ftp.cistron.nl/pub/people/miquels/sysvinit/
#
# This architect blueprint is copyright (c)2003 David Horton
# dhorton@nospam.speakeasy.net
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to: 
#
#   Free Software Foundation, Inc.
#   59 Temple Place - Suite 330
#   Boston, MA 02111-1307, USA
#
#
# Define the package name, source directory, build directory and
# staging directory paths.  Prefixes to directories may be overridden
# by setting shell variables SRC, BUILD and STAGING.  For example,
# doing "export SRC=/root/foo" before calling this script will override
# the default /usr/src and set SRC_DIR to /root/foo/$PKG_NAME instead.
# 
PKG_NAME=$(basename $0)
SRC_DIR=${SRC:-/usr/src}/$PKG_NAME
# Remove "-static" from the source path using sed.
SRC_DIR=$(echo "$SRC_DIR" | sed s/-static//)
BUILD_DIR=${BUILD:-/var/tmp/build}/$PKG_NAME
STAGING_DIR=${STAGING:-/var/tmp/staging}/$PKG_NAME
#
# Check that the source directory really exits and bail out if not.
if ! [ -d $SRC_DIR ]; then
  echo "Cannot find source code directory $SRC_DIR."
  exit 1
fi
#
# Do not overwrite existing build directory.
if [ -d $BUILD_DIR ]; then
  echo "Build directory $BUILD_DIR already exists."
  exit 2
else
  mkdir -p $BUILD_DIR
fi
#
# Do not overwrite existing staging directory.
if [ -d $STAGING_DIR ]; then
  echo "Staging directory $STAGING_DIR already exists."
  exit 4
else
  mkdir -p $STAGING_DIR
fi
#
# This is not one of the packages that can be configured and built
# completely outside of the source tree.  So in order to leave the
# original source untouched, the contents of $SRC_DIR are first copied
# to $BUILD_DIR.  The copy in $BUILD_DIR is then modified to suit the
# configuration.
cp -dpR $SRC_DIR/* $BUILD_DIR
#
# This is not really a configuration change, it is to make sure that
# /dev/initctl gets created properly in the staging area.
cd $BUILD_DIR/src
mv Makefile Makefile.orig
sed -e 's!/dev/initctl!$(ROOT)/dev/initctl!' Makefile.orig > Makefile
#
# Configuration is done by passing variables to make in order to over-
# ride the values defined in the Makefile.  The CC variable is used to
# configure the use of gcc and i386 compatible code.
make CC="gcc -mcpu=i386" STATIC="-static"
#
# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "Build failed with error code $?"
  exit 16
fi
#
# Set up a directory structure and install into staging area.
mkdir $STAGING_DIR/dev
mkdir $STAGING_DIR/sbin
mkdir $STAGING_DIR/usr
mkdir $STAGING_DIR/usr/bin
mkdir $STAGING_DIR/usr/include
mkdir $STAGING_DIR/usr/share
mkdir $STAGING_DIR/usr/share/man
mkdir $STAGING_DIR/usr/share/man/man1
mkdir $STAGING_DIR/usr/share/man/man5
mkdir $STAGING_DIR/usr/share/man/man8
make ROOT=$STAGING_DIR install
#
# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "Installation to staging area failed with error code $?"
  exit 32
fi
#
# end of sysvinit-static blueprint