#! /bin/sh
#
# This is a script run from cron to rotate the list archive file monthly.
#
cd /export/ftp/pub/mouse/mouseware/list-archive
now=`date +%s`
# 80000 not 86400 in case of a DST changepoint
# We trust that we won't get delayed so long that now-80000 is still today.
prev=$(($now-80000))
umask 022
mkdir -p `date -r $prev +%Y` &&
  ln current `date -r $prev +%Y/%m` &&
  touch current+ &&
  mv current+ current