Datetime sanity check

#!/bin/bash

me="$(basename "$(test -L "$0" && readlink "$0" || echo "$0")")"
now=`date +%s`
filetime=`stat -f %m $me`


if [ "$now" -lt "$filetime" ]; then
  echo "System time is too old. Updating system time."
  date -f %s $filetime
else
  # Touch the file to update the mtime.
  touch $me
fi