if [ -f "$CDEH_HISTROOT`pwd`"/history ]; then
  echo "$CDEH_HISTROOT`pwd`/history already exists."
  exit 1
fi

mkdir -p "$CDEH_HISTROOT`pwd`"
history | sed -e 's/^[[:space:]]*[[:digit:]]*[[:space:]]*//' > "$CDEH_HISTROOT`pwd`"/history
echo -n > "$CDEH_TMP/prevwd"