#!/bin/shFN=""if [ "-f" = "$1" ]; then  shift  FN=$1  shiftfiif [ -z "$1" ]; then echo "No date specified"; exit 1; fiif WHEN=`date -d "$1" +%s`; then  AT=/var/spool/at/$WHEN.$$  echo '#!/bin/sh' >$AT.new  # reproduce the 'at' execution environment here?  /bin/cat $FN >>$AT.new  echo 'rm -f $0' >>$AT.new  /bin/chmod 755 $AT.new  /bin/mv $AT.new $AT  echo >/var/spool/at/triggerelse  exit $?fi