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: / usr / share / sendmail /
Filename : update_tcpd
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#!/bin/sh -e
#-----------------------------------------------------------------------------
#
# Update TCPD environment (TCP Wrappers) for sendmail
#
# Copyright (c) 2001-2001 Richard Nelson.  All Rights Reserved.
# Time-stamp: <2001/01/17 10:00:00 cowboy>
#
# Notes (to all):
#
# Notes (to self):
#
#-----------------------------------------------------------------------------
set -e

#------------------------------------------------------------------------------
# Check to see if sendmail is mentioned in /etc/hosts.allow
#	Note:  This check is far from perfect - it requires sendmail and : be
#		   on the same line.  If you've got a better approach, I'd love to
#		   see it (Maybe awk/perl)!

# Path to other sendmail helpers
if [ -x ./update_sendmail ]; then
	sm_path='.';
elif [ -x $(dirname $0)/update_sendmail ]; then
	sm_path=$(dirname $0);
else
	sm_path=/usr/share/sendmail;
	fi;
# Bring in sendmail.conf for the network definitions
if [ ! -f /etc/mail/sendmail.conf ]; then
	if [ -x $sm_path/update_conf ]; then
		$sm_path/update_conf;
		fi;
	fi;
if [ -f /etc/mail/sendmail.conf ]; then
	. /etc/mail/sendmail.conf;
	fi;
if [ "$HANDS_OFF" != 'No' ]; then
	exit 0;
	fi;

if grep -qEe "^[^#:]*sendmail[^:]*[:]" /etc/hosts.allow 2>/dev/null; then
	need_tcpd=0
else
	need_tcpd=1
	fi

if [ ! -e /etc/hosts.allow ]; then
	need_tcpd=0
	fi

if [ $need_tcpd -eq 1 ]; then
	cat <<-EOT

	Updating /etc/hosts.allow, adding "sendmail: all".

	Please edit /etc/hosts.allow and check the rules location to
	make sure your security measures have not been overridden -
	it is common to move the sendmail:all line to the *end* of
	the file, so your more selective rules take precedence.
EOT

	echo "sendmail: all" | cat - /etc/hosts.allow >/etc/hosts.allow.new
	mv -f /etc/hosts.allow.new /etc/hosts.allow

	if [ -e /etc/init.d/netbase ]; then
		/etc/init.d/netbase reload >/dev/null
	elif [ -e /etc/init.d/inetd ]; then
		/etc/init.d/inetd reload >/dev/null
		fi
	fi

exit 0