Listing 4: fsd

#!/bin/sh
#
# filesystem.hourly
#
# filesystem-related operations done once per hour
#
NOTIFY=ables@hal.com    # who to tell if we find something
MAILER=/usr/ucb/mail    # use this mailer to send

HOST=`hostname`
TMP=/tmp/fs.$$
rm -rf $TMP
touch $TMP

/usr/local/cron/duck    >> $TMP         # check user totals
/usr/local/cron/dfck    >> $TMP         # check fs capacity
/usr/local/cron/mboxck  >> $TMP         # check mail spool dir

if [ -s $TMP ]; then    # if output was produced
$MAILER -s "filesystem hourly check on $HOST" $NOTIFY <$TMP
fi

rm -f $TMP