#!/bin/sh
PATH=/usr/ucb:/bin:/usr/local/bin
MHU=/news/mit-hosts/update
HOSTS=/afs/net.mit.edu/admin/hosts/hstath.txt
SENDTO="usenet@mit.edu"
rm -f ${MHU}.mail ${MHU}.new
grep '^HOST :' ${HOSTS} | grep -v '^HOST : 18\.' | sort -u > ${MHU}.new
diff ${MHU}.old ${MHU}.new > ${MHU}.mail
if [ -s ${MHU}.mail ]; then
   mail -s "non-net-18 mit.edu hosts update" ${SENDTO} < ${MHU}.mail
fi
rm -f ${MHU}.mail ${MHU}.old
mv ${MHU}.new ${MHU}.old