#!/bin/sh
#
# postfix      Postfix Mail Transfer Agent
#
# chkconfig: 2345 80 30
# description: Postfix is a Mail Transport Agent, which is the program \
#              that moves mail from one machine to another.
# processname: master
# pidfile: /var/spool/postfix/pid/master.pid
# config: /etc/postfix/main.cf
# config: /etc/postfix/master.cf

### BEGIN INIT INFO
# Provides: postfix
# Required-Start: $network
# Required-Stop: $network
# Should-Start: $named mysqld postgresql ldap saslauthd
# Should-Stop: $named mysqld postgresql ldap saslauthd
# Default-Start: 2 3 4 5
# Short-Description: Starts the postfix daemons
# Description: Postfix is a Mail Transport Agent, which is the program \
#              that moves mail from one machine to another.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Source package configuration.
CHROOT=0
REBUILD_ALIASES=1
REBUILD_MAPS=1
. /etc/sysconfig/postfix


# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

[ -x /usr/sbin/postfix ] || exit 5 #program is not installed
[ -f /etc/postfix/main.cf ] || exit 6 #program is not configured
[ -d /var/spool/postfix ] || exit 06 #program is not configured

RETVAL=0

readconf() {
	# postconf will also print defaults
	/usr/sbin/postconf -c $1
	# postconf does not print unknown parameters
	awk '
		/^[[:space:]]*#/ {next}
		/^[[:space:]]*$/ {next}
		/^[[:space:]]/ {l = l $0; next}
		{print l; l = $0}
		END {print l}
	' $1/main.cf
	# some options could be overridden in master.cf
	awk '
		function opt(l) {
		  $0 = l
		  for (i=1;i<NF;i++) {
			if ($i == "-o") {i++;print $i}
			  }
		}
		/^[[:space:]]*#/ {next}
		/^[[:space:]]*$/ {next}
		/^[[:space:]]/ {l = l $0; next}
		{nl=$0; opt(l); l = nl}
		END {opt(l)}
	' $1/master.cf
}
		
refresh() {
	local d
	local i
	for d in "$@"; do
		# refresh aliases
		[ "${REBUILD_ALIASES}" = "1" ] && for i in `readconf $d | perl -ne '
				/^alias_(database|maps)[[:space:]]*=/ || next;
				while (/(hash|btree|cdb|sdbm|dbm):([^,\s]+)/g) {$a{"$1:$2"}=1;}
				END {print join(" ",keys %a),"\n";}'`; do
			case ${i%:*} in
				hash|btree) [ -e ${i#*:} -a ! -e ${i#*:}.db -o ${i#*:} -nt ${i#*:}.db ] && /usr/sbin/postalias -c $d $i ;;
				cdb) [ -e ${i#*:} -a ! -e ${i#*:}.cdb -o ${i#*:} -nt ${i#*:}.cdb ] && /usr/sbin/postalias -c $d $i ;;
				sdbm|dbm) [ -e ${i#*:} -a ! -e ${i#*:}.dir -o ${i#*:} -nt ${i#*:}.dir -o ! -e ${i#*:}.pag -o ${i#*:} -nt ${i#*:}.pag  ] && /usr/sbin/postalias -c $d $i ;;
			esac
		done
		# refresh other maps
		[ "${REBUILD_MAPS}" = "1" ] && for i in `readconf $d | perl -ne '
				/^alias_(database|maps)\s*=/ && next;
				while (/(hash|btreecdb|sdbm|dbm):([^,\s]+)/g) {$a{"$1:$2"}=1;}
				END {print join(" ",keys %a),"\n";}'`; do
			case ${i%:*} in
				hash|btree) [ -e ${i#*:} -a ! -e ${i#*:}.db -o ${i#*:} -nt ${i#*:}.db ] && /usr/sbin/postmap -c $d $i ;;
				cdb) [ -e ${i#*:} -a ! -e ${i#*:}.cdb -o ${i#*:} -nt ${i#*:}.cdb ] && /usr/sbin/postmap -c $d $i ;;
				sdbm|dbm) [ -e ${i#*:} -a ! -e ${i#*:}.dir -o ${i#*:} -nt ${i#*:}.dir -o ! -e ${i#*:}.pag -o ${i#*:} -nt ${i#*:}.pag  ] && /usr/sbin/postmap -c $d $i ;;
			esac
		done
	done
}

postfix_cmd() {
	local _rc=0
	local i
	if [ "$MANAGE_MULTI_INSTANCES" = "1" ]; then
		if [ -n "${MANAGE_ONLY_INSTANCES}" -o -n "${MANAGE_ONLY_INSTANCE_GROUPS}" ]; then
			for i in ${MANAGE_ONLY_INSTANCES}; do
				/usr/sbin/postmulti -i $i -p "$@" 2>/dev/null 1>&2
				_rc=$(( $rc + $? ))
			done
			for i in ${MANAGE_ONLY_INSTANCE_GROUPS};do
				/usr/sbin/postmulti -g $i -p "$@" 2>/dev/null 1>&2
				_rc=$(( $rc + $? ))
			done
		else
			/usr/sbin/postfix "$@" 2>/dev/null 1>&2
			_rc=$?
		fi
	else
		/usr/sbin/postmulti -i - -p "$@" 2>/dev/null 1>&2
		_rc=$?
	fi
	return $_rc
}

start() {
	local i
	echo -n "Starting postfix: "
	# refresh chroot
	[ "${CHROOT}" = "1" ] && /usr/sbin/postfix-chroot.sh -q check_update

	if [ "$MANAGE_MULTI_INSTANCES" = "1" ]; then
		if [ -n "${MANAGE_ONLY_INSTANCES}" -o -n "${MANAGE_ONLY_INSTANCE_GROUPS}" ]; then
			for i in ${MANAGE_ONLY_INSTANCES}; do
				refresh `postmulti -i $i -l | awk '$3 == "y" {print $4}'`
			done
			for i in ${MANAGE_ONLY_INSTANCE_GROUPS};do
				refresh `postmulti -g $i -l | awk '$3 == "y" {print $4}'`
			done
		else
			refresh `postmulti -l | awk '$3 == "y" {print $4}'`
		fi
	else
		refresh /etc/postfix
	fi
	postfix_cmd start && success || failure
	RETVAL=$?

	[ $RETVAL -eq 0 ] && touch /var/lock/subsys/postfix
        echo
	return $RETVAL
}

stop() {
	echo -n "Shutting down postfix: "
	postfix_cmd stop && success || failure
	RETVAL=$?
	[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/postfix
	echo
	return $RETVAL
}

reload() {
	echo -n "Reloading postfix: "
	postfix_cmd reload && success || failure
	RETVAL=$?
	echo
	return $RETVAL
}

abort() {
	postfix_cmd abort && success || failure
	RETVAL=$?
	return $RETVAL
}

flush() {
	postfix_cmd flush && success || failure
	RETVAL=$?
	return $RETVAL
}

check() {
	postfix_cmd check && success || failure
	RETVAL=$?
	return $RETVAL
}

restart() {
	stop
	start
	return $?
}

# See how we were called.
case "$1" in
  start)
	start
	;;
  stop)
	stop
	;;
  restart)
	restart
	;;
  force-reload|reload)
	reload
	;;
  abort)
	abort
	;;
  flush)
	flush
	;;
  check)
	check
	;;
  status)
  	status master
	;;
  try-restart|condrestart)
	if [ -f /var/lock/subsys/postfix ]; then
	    restart
	else
	    RETVAL=7 # program is not running
	fi
	;;
  *)
	echo "Usage: postfix {start|stop|restart|force-reload|reload|abort|flush|check|status|try-restart|condrestart}"
	exit 2 # invalid or excess argument(s)
	;;
esac

exit $RETVAL