#!/usr/bin/env sh

if [ $# != 3 ]; then
  echo "usage: $0 <cache-fs> <backing-pool> <days-old>"
  exit 1
fi

CACHE="${1}"
BACKING="${2}"
N=${3}

find "${CACHE}" -type f -atime +${N} -printf '%P\n' | \
  rsync --files-from=- -axqHAXWES --preallocate --remove-source-files "${CACHE}/" "${BACKING}/"