#!/bin/sh -e
#
# Script to swap from a FreeBSD system to a Debian GNU/kFreeBSD
#
# Originally written by Robert Millan <rmh@debian.org>
# Modified by Guillem Jover <guillem@debian.org>
#
# $Id: swap 14 2004-05-23 18:41:12Z rmh $
#

VERSION=0.1.1

OLDROOT=/old
NEWROOT=$1

if ! test "$#" = "1" ; then
  echo Swaps root filesystem contents with a given directory, use with care !!!
  echo !!! This script may trash your system and destroy your data !!!
  echo
  echo Usage: `basename $0` directory
  exit
fi

if ! test "`mount | grep -v ' on / ' | grep -v ' on /dev ' | wc -l | rev | cut -c 1`" = "0" ; then
  echo There are mounted filesystems other than / and /dev, exiting
  exit
fi

test -e /bin/mkdir || { echo Needed /bin/mkdir does not exist; exit 1; }
test -e /bin/mv || { echo Needed /bin/mv does not exist; exit 1; }

test -e $NEWROOT || { echo Directory $NEWROOT does not exist; exit 1; }
test ! -e $OLDROOT || { echo Directory $OLDROOT already exist; exit 1; }

move_list=""
for i in /* ; do
  case i in
    /dev|/boot|/lib/ld*) ;;
    *) move_list="$move_list $i" ;;
  esac
done

echo Going to move: $move_list
echo Verify it and press [Enter] to continue or [Ctrl-C] to cancel.
read KEY

rm -rf $NEWROOT/dev
rm -rf $NEWROOT/boot

# we want to know what happens here..
set -x

mkdir -p /lib
cp /$NEWROOT/lib/ld.so.1 /lib/

mkdir $OLDROOT
echo "$move_list" | xargs -J % mv % $OLDROOT/
LD_LIBRARY_PATH=$OLDROOT/$NEWROOT/lib \
  $OLDROOT/$NEWROOT/bin/mv $OLDROOT/$NEWROOT/lib/* /lib/
$OLDROOT/$NEWROOT/bin/mv $OLDROOT/$NEWROOT/* /

set +x

# using native commands now

#echo "Working around NFS support"
#mkdir /var/db
#cp -f $OLDROOT/etc/netconfig /etc/

#echo "Setting up root passwd"
#dpkg-reconfigure passwd

rmdir $OLDROOT/$NEWROOT

echo Seems it went ok

echo Now running native-install ... press [Enter]
read KEY

chroot / /native-install