#!/usr/bin/bash
#
# Copyright (C) 1997-2003 Sistina Software, Inc.  All rights reserved.
# Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#

export LC_ALL=C
export LANG=C
export PATH=/bin:/sbin:/usr/bin:/usr/sbin

. $(dirname $0)/ocf-shellfuncs
. $(dirname $0)/utils/config-utils.sh
. $(dirname $0)/utils/messages.sh
. $(dirname $0)/utils/ra-skelet.sh

declare NAMED_NAMED=/usr/sbin/named
declare NAMED_pid_file="`generate_name_for_pid_file`"
declare NAMED_conf_dir="`generate_name_for_conf_dir`"
declare NAMED_gen_config_file="$NAMED_conf_dir/named.conf"
declare NAMED_url_list
declare NAMED_parse_config=$(dirname $0)/utils/named-parse-config.pl
declare NAMED_update_src="false"

verify_all()
{
	clog_service_verify $CLOG_INIT

	if [ -z "$OCF_RESKEY_name" ]; then
		clog_service_verify $CLOG_FAILED "Invalid Name Of Service"
		return $OCF_ERR_ARGS
	fi

	if [ -z "$OCF_RESKEY_service_name" ]; then
		clog_service_verify $CLOG_FAILED_NOT_CHILD
		return $OCF_ERR_ARGS
	fi

	if [ -z "$OCF_RESKEY_config_file" ]; then
		clog_check_file_exist $CLOG_FAILED_INVALID "$OCF_RESKEY_config_file"
		clog_service_verify $CLOG_FAILED
		return $OCF_ERR_ARGS
	fi

	if [ ! -r "$OCF_RESKEY_config_file" ]; then
		clog_check_file_exist $CLOG_FAILED_NOT_READABLE $OCF_RESKEY_config_file
		clog_service_verify $CLOG_FAILED
		return $OCF_ERR_ARGS
	fi

	if [ -n "$OCF_RESKEY_update_source" ]; then
		NAMED_update_src=$OCF_RESKEY_update_source
	fi
	clog_service_verify $CLOG_SUCCEED
		
	return 0
}

generate_config_file()
{
	declare original_file="$1"
	declare generated_file="$2"
	declare ip_address="$3"

	if [ -f "$generated_file" ]; then
		sha1_verify "$generated_file"
		if [ $? -ne 0 ]; then
			clog_check_sha1 $CLOG_FAILED
			return 0
		fi
	fi	

	clog_generate_config $CLOG_INIT "$original_file" "$generated_file"

	generate_configTemplate "$generated_file" "$1"
	cat "$original_file" | grep -v "^[[:space:]]*listen-on" | \
		grep -v "^[[:space:]]*pid-file" | \
		grep -v "^[[:space:]]*directory" >> "$generated_file"

	declare tmp_file=`mktemp -t cluster.XXXXXXXXXX`
	mv "$generated_file" "$tmp_file"

	"$NAMED_parse_config" "$OCF_RESKEY_named_working_dir" "$NAMED_pid_file" "$ip_address" "$NAMED_update_src"\
		 < "$tmp_file" > "$generated_file"

	rm "$tmp_file"	
        sha1_addToFile "$generated_file"
	clog_generate_config $CLOG_SUCCEED "$original_file" "$generated_file"

	return 0;
}

start()
{
	declare ip_list;
	declare username=""
	
	clog_service_start $CLOG_INIT

	# Pull out the user name from the options argument if it is set.
	# We need this to properly set the pidfile permissions
	if [ -n "$OCF_RESKEY_named_options" ]; then
		username=$(echo "$OCF_RESKEY_named_options" | sed -n -e 's/^.*-u[[:space:]]*\(\S*\)[[:space:]]*.*$/\1/p')
	fi

	create_pid_directory "$username"
	create_conf_directory "$NAMED_conf_dir"
	check_pid_file "$NAMED_pid_file"

	if [ $? -ne 0 ]; then
		clog_check_pid $CLOG_FAILED "$NAMED_pid_file"
		clog_service_start $CLOG_FAILED
		return $OCF_ERR_GENERIC
	fi
	clog_looking_for $CLOG_INIT "IP Addresses"

        get_service_ip_keys "$OCF_RESKEY_service_name"
        ip_addresses=`build_ip_list`

	if [ -z "$ip_addresses" ]; then
		clog_looking_for $CLOG_FAILED_NOT_FOUND "IP Addresses"
		return $OCF_ERR_GENERIC
	fi
	
	clog_looking_for $CLOG_SUCCEED "IP Addresses"

	ip_list=`echo $ip_addresses | sed 's/ /;/;s/\([[:digit:]]\)$/\1;/' `

	if [ -z "$ip_list" ]; then
		clog_looking_for $CLOG_FAILED_NOT_FOUND "IP Addresses"
		return $OCF_ERR_GENERIC
	fi

	[ -x /sbin/portrelease ] && /sbin/portrelease named &>/dev/null

	generate_config_file "$OCF_RESKEY_config_file" "$NAMED_gen_config_file" "$ip_list"

	$NAMED_NAMED -c "$NAMED_gen_config_file" $OCF_RESKEY_named_options

	if [ $? -ne 0 ]; then
		clog_service_start $CLOG_FAILED
		return $OCF_ERR_GENERIC
	fi

	clog_service_start $CLOG_SUCCEED

	return 0;
}

stop()
{
	clog_service_stop $CLOG_INIT

	stop_generic "$NAMED_pid_file" "$OCF_RESKEY_shutdown_wait"
	
	if [ $? -ne 0 ]; then
		clog_service_stop $CLOG_FAILED
		return $OCF_ERR_GENERIC
	fi
	
	clog_service_stop $CLOG_SUCCEED
	return 0;
}

status()
{
	clog_service_status $CLOG_INIT

	status_check_pid "$NAMED_pid_file"
	if [ $? -ne 0 ]; then
		clog_service_status $CLOG_FAILED "$NAMED_pid_file"
		return $OCF_ERR_GENERIC
	fi

	clog_service_status $CLOG_SUCCEED
	return 0
}

case $1 in
	meta-data)
		cat `echo $0 | sed 's/^\(.*\)\.sh$/\1.metadata/'`
		exit 0
		;;
	validate-all)
		verify_all
		exit $?
		;;
	start)
		verify_all && start
		exit $?
		;;
	stop)
		verify_all && stop
		exit $?
		;;
	status|monitor)
		verify_all
		status
		exit $?
		;;
	restart)
		verify_all
		stop
		start
		exit $?
		;;
	*)
		echo "Usage: $0 {start|stop|status|monitor|restart|meta-data|validate-all}"
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac
