#!/bin/sh
# change display manager and window/desktop

DISP=(xdm kdm gdm slim)
MANAGER=(step gnome kde twm xfce)

if [ -z $2 ]; then
  echo "Usage: change.sh display_manager  window"
  echo ""
  exit 2
fi

# s/afterstep/step/
if [ $2 = "afterstep" ]; then
  echo 'You can set afterstep as "step".'
  exit 2
fi

# check $1 
for man in ${DISP[@]}
do
  if [ $1 = $man ]; then
    P1=$1
    break
  fi
done
if [ -z  $P1 ]; then
  echo "Wrong Display Manager."
  exit 3
fi

# check $2
for man in ${MANAGER[@]}
do
  if [ $2 = $man ]; then
    P2=$2
    break
  fi
done
if [ -z  $P2 ]; then
  echo "Wrong Window Manager."
  exit 4
fi
echo $P1 $P2

rm $HOME/.xinitrc
ln -s $HOME/.xinitrc_${P2} $HOME/.xinitrc

sudo rm /etc/rc.d/rc.4
sudo ln -s /etc/rc.d/rc.4.${P1} /etc/rc.d/rc.4