echo I just need to know a few things...
read -p "This machine's name [$(hostname -s)]: " devsuffix
[ x${devsuffix}x = xx ] && devsuffix=$(hostname -s)
read -p "What email address should emails be redirected to? [devel]: " email
[ x${email}x = xx ] && email=devel
echo

echo "Set hostname."
echo "hostname=$devsuffix.internal" >> /etc/rc.conf
hostname $devsuffix.internal

echo "Reconfigure sendmail to deliver all mail to $email" # This is (very) evil.. but it works
cd /etc/mail
make >/dev/null
# Add in 'redirect everything to $username@localhost mail spool...
head -$(grep -n 'R\$@' $devsuffix.internal.cf | head -1 | cut -d\: -f1) $devsuffix.internal.cf > temp
cat <<EOF >>temp
DR$email
R$+                     $: \$R # Redirect all mail to $email
EOF
tail -$(($(wc -l $devsuffix.internal.cf | awk '{print $1}')-$(grep -n 'R\$@' $devsuffix.internal.cf | head -1 | cut -d\: -f1))) $devsuffix.internal.cf >>temp
mv temp $devsuffix.internal.cf
# and again for .submit.cf...
head -$(grep -n 'R\$@' $devsuffix.internal.submit.cf | head -1 | cut -d\: -f1) $devsuffix.internal.submit.cf > temp
cat <<EOF >>temp
DR$email
R$+                     $: \$R # Redirect all mail to $email
EOF
tail -$(($(wc -l $devsuffix.internal.submit.cf | awk '{print $1}')-$(grep -n 'R\$@' $devsuffix.internal.submit.cf | head -1 | cut -d\: -f1))) $devsuffix.internal.submit.cf >>temp
mv temp $devsuffix.internal.submit.cf
make install >/dev/null
make restart >/dev/null