#!/bin/sh

set -e

# don't let people kill us. We shouldn't be long, so this isn't a big deal.

trap "" TSTP
trap "" HUP
trap "" INT
trap "" QUIT
trap "" TERM

function restart_xinetd ()
{
	kill -HUP $(cat /var/run/xinetd.pid 2>/dev/null) 2>/dev/null || /usr/sbin/xinetd -pidfile /var/run/xinetd.pid
}

if [ $# -eq 0 ]
then
   echo "Usage: $(basename $0) --list | <service-name> <command>" >&2
   exit 1
fi

if [ "$1" == "--list" ]
then
	cd /etc/xinetd.d 2>/dev/null
	echo smtp
	echo fax-receive
	ls -1
	exit 0
elif [ "$1" == "--test-if-configured-on" ]
then
	if [ "$2" = "smtp" ]
	then
		egrep '^MAILSERVER.*-YES-' /etc/hostconfig >/dev/null 2>&1
		exit $? 
	fi
	if [ "$2" = "fax-receive" ]
	then
		egrep '^fax.*unknown.*on$' /etc/ttys >/dev/null 2>&1
		exit $? 
	fi
	[ ! -f "/etc/xinetd.d/$2" ] && exit 1
	egrep "disable.*=.*no" /etc/xinetd.d/$2 >/dev/null 2>&1
	exit $?
elif [ "$1" == "--test-if-available" ]
then
	[ "$2" = "smtp" ] && exit 0
	[ "$2" = "fax-receive" ] && exit 0
	[ ! -f "/etc/xinetd.d/$2" ] && exit 1
	SERVER_FILE=$(egrep 'server[ 	]' "/etc/xinetd.d/$2" | sed 's,.*server[ 	]*=[ 	]*\(.*\),\1,g')
	[ ! -f "$SERVER_FILE" ] && exit 1
	exit 0
elif [ -f "/etc/xinetd.d/$1" ]
then
	if [ $UID != 0 ]
	then
		echo "You must be root to run this option" >&2
		exit 1
	fi
	# yes, /var/run is gross, but it is tmp directory cleaned up a boot,
	# writable only by root (so i don't need to worry about the security
	# implications of mktemp)
	TMPFILE=$(mktemp /var/run/xinetd.tmp.$$.XXXXXX)
	cp -f "/etc/xinetd.d/$1" $TMPFILE
	if [ "$2" == start ]
	then
		sed 's/disable.*=.*/disable = no/g' < $TMPFILE > "/etc/xinetd.d/$1"
		restart_xinetd
	elif [ "$2" == stop ]
	then
		sed 's/disable.*=.*/disable = yes/g' < $TMPFILE > "/etc/xinetd.d/$1"
		restart_xinetd
	else
		echo "No such service command" >&2
	fi
	rm -f $TMPFILE
elif [ "$1" = "smtp" ]
then
	if [ $UID != 0 ]
	then
		echo "You must be root to run this option" >&2
		exit 1
	fi
	TMPFILE=$(mktemp /var/run/xinetd.tmp.$$.XXXXXX)
	cp -f /etc/hostconfig $TMPFILE
	if [ "$2" == start ]
	then
		if grep -q MAILSERVER=-NO- /etc/hostconfig ; then
			sed 's,^MAILSERVER=-NO-,MAILSERVER=-YES-,g' < $TMPFILE > /etc/hostconfig
		fi
		postfix start
		postfix flush
	elif [ "$2" == stop ]
	then
		if grep -q MAILSERVER=-YES- /etc/hostconfig ; then
			sed 's,^MAILSERVER=-YES-,MAILSERVER=-NO-,g' < $TMPFILE > /etc/hostconfig
		fi
		postfix stop
	else
		echo "No such service command" >&2
	fi
	rm -f $TMPFILE
elif [ "$1" = "fax-receive" ]
then
	if [ $UID != 0 ]
	then
		echo "You must be root to run this option" >&2
		exit 1
	fi
	TMPFILE=$(mktemp /var/run/xinetd.tmp.$$.XXXXXX)
	cp -f /etc/ttys $TMPFILE
	if [ "$2" == start ]
	then
		sed 's,^fax\(.*\)off$,fax\1on,g' < $TMPFILE > /etc/ttys
		kill -HUP 1
	elif [ "$2" == stop ]
	then
		sed 's,^fax\(.*\)on$,fax\1off,g' < $TMPFILE > /etc/ttys
		kill -HUP 1
	else
		echo "No such service command" >&2
	fi
	rm -f $TMPFILE
else
	echo "No such service $1" >&2
	exit 1
fi