#!/bin/sh
BOCHS=@prefix@/bin/bochs
DLXINST=@prefix@/share/bochs/dlxlinux
GZIP=@GZIP@
if [ ! -z $1 ]; then
  DLXPATH=$1
else
  DLXPATH=$HOME/.bochsdlx
fi
CONFFILE=$HOME/.bochsdlx/bochsconf

makedlxdir() {
  echo 
  echo ---------------------------------------------------------------
  echo To run the DLX Linux demo, I need to create a directory called 
  echo $DLXPATH, and copy some configuration files 
  echo and a 10 megabyte disk image into the directory.
  echo ---------------------------------------------------------------
  ok='unknown'
  while test $ok = 'unknown'; do
    echo Is that okay? [y/n]
    read j
    case $j in
	    y*) ok=1 ;;
	    n*) ok=0 ;;
    esac
  done
  if test $ok != 1; then
    echo Aborting
    exit 1
  fi
  #echo DEBUG: Creating $HOME/.bochsdlx/bochsrc
  echo DLXPATH=$DLXPATH > $CONFFILE
  . $CONFFILE
  for file in bochsrc.txt readme.txt testform.txt; do
    if [ ! -f $DLXPATH/$file ]; then
      echo Copying $DLXINST/$file '->' $DLXPATH/.
      cp $DLXINST/$file $DLXPATH/.
    else
      echo "ERROR: $file already exists in $DLXPATH. Remove it to replace."
    fi;
  done
  if [ ! -f $DLXPATH/hd10meg.img ]; then
    echo Uncompressing $DLXINST/hd10meg.img.gz '->' $DLXPATH/hd10meg.img
    $GZIP -dc $DLXINST/hd10meg.img.gz > $DLXPATH/hd10meg.img
  else
    echo "ERROR: hd10meg.img already exists in $DLXPATH. Remove it to replace."
  fi
}

echo ---------------------------------------------------------------
echo "            DLX Linux Demo, for Bochs x86 Emulator"
echo ---------------------------------------------------------------

echo -n "Checking for bochs binary..."
if test ! -x $BOCHS; then
  echo FAILED
  echo ERROR: I could not find bochs in $BOCHS
  exit 1
fi
echo ok
echo -n "Checking for DLX linux directory..."
if test ! -d $DLXINST; then
  echo FAILED
  echo ERROR: I could not find the DLX linux directory.
  exit 1
fi
echo ok
echo -n "Checking for $GZIP..."
$GZIP < /dev/null > /dev/null 
if test $? = 0; then
  echo ok
else
  echo not found
  echo ERROR: without $GZIP in your PATH, I cannot continue.
  exit 1
fi
echo -n "Checking for $HOME/.bochsdlx directory..."
if test -d "$HOME/.bochsdlx"; then
  echo "ok"
  if test -f "$CONFFILE"; then
    . $CONFFILE
  else
    makedlxdir
  fi
else
  #echo DEBUG: Creating $HOME/.bochsdlx
  mkdir -p $HOME/.bochsdlx
  mkdir -p $DLXPATH
  makedlxdir
fi
echo Entering $DLXPATH
cd $DLXPATH

# Now that we're in the DLXPATH, make sure that bochsrc.txt & hd10meg.img exist
if test ! -f bochsrc.txt; then
  echo ERROR: bochsrc.txt not found
  exit 1
fi
if test ! -f hd10meg.img; then
  echo ERROR: hd10meg.img not found
  exit 1
fi

echo Running bochs

# ok now try it
$BOCHS -q

echo
echo ---------------------------------------------------------------
echo The DLX Linux demo is over.  If you want to free up the disk 
echo space in your account, remove the .bochsdlx directory from
echo your home directory.  Example:
echo "   rm -rf ~/.bochsdlx"
echo Please be careful with rm -rf because it can make a mess.
echo ---------------------------------------------------------------
exit 0
