#!/bin/sh -e
# Checks whether the current user has rights to the respective file(s),
# even if it does not exist.
# First parameter defines which rights are required and is passed to "test".
flag=$1
while test $# -gt 1; do
  shift
  dir="$1"
  while ! test -e "$dir"
  do dir="$(dirname "$dir")"
  done
  test $flag "$dir"
done