#!/bin/sh
#
# Copyright (c) 2013 Nagios Plugins Development Team
#
# Originally written by Holger Weiss <holger@zedat.fu-berlin.de>.
#
# This file is free software; the Nagios Plugins Development Team gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY, to the extent permitted by law; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

mirrors='
    ftp://ftp.fu-berlin.de/unix/network/nagios-plugins/
    ftp://ftp.lysator.liu.se/pub/nagios-plugins/
    ftp://mirrors.ustc.edu.cn/nagios-plugins/
'
#
# Our mirrors:
#
# GERMANY
#
#   URLs:
#   - ftp://ftp.fu-berlin.de/unix/network/nagios-plugins/
#
#   Features:
#   - IPv4
#   - 10 GBit/s
#
#   Contacts:
#   - Mirror Admins <ftp AT fu-berlin.de>
#   - Holger Weiss <holger AT zedat.fu-berlin.de>
#
#   Home page:
#   - http://www.fu-berlin.de/en/
#
# SWEDEN
#
#   URLs:
#   - ftp://ftp.lysator.liu.se/pub/nagios-plugins/
#   - http://ftp.lysator.liu.se/pub/nagios-plugins/
#   - https://ftp.lysator.liu.se/pub/nagios-plugins/
#   - rsync://ftp.lysator.liu.se/pub/nagios-plugins/
#
#   Features:
#   - IPv4
#   - IPv6
#   - 1 GBit/s
#
#   Contacts:
#   - Mirror Admins <ftp-master AT lysator.liu.se>
#   - Niclas Zeising <zeising AT lysator.liu.se>
#
#   Home page:
#   - http://www.lysator.liu.se/english.html
#
# CHINA
#
#   URLs:
#   - ftp://mirrors.ustc.edu.cn/nagios-plugins/
#   - http://mirrors.ustc.edu.cn/nagios-plugins/
#   - rsync://mirrors.ustc.edu.cn/nagios-plugins/
#
#   Features:
#   - IPv4
#   - IPv6
#
#   Contacts:
#   - Mirror Admins <lug AT ustc.edu.cn>
#   - Roy Zhang <pudh4418 AT gmail.com>
#
#   Home page:
#   - http://lug.ustc.edu.cn/
#

set -e
set -u
umask 022

export PATH='/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin'

prefix='/home/plugins'
myself=${0##*/}
download_dir="$prefix/web/download"
temp_dir=$(mktemp -d "/tmp/$myself.XXXXXX")

trap 'rm -rf "$temp_dir"' EXIT

cd "$temp_dir"
date -d 'yesterday' '+%F' >'expected'
for mirror in $mirrors
do
	url="${mirror%/}/timestamp"

	if curl -s -S -O -m 600 --ftp-method 'nocwd' "$url" >'curl.log' 2>&1
	then
		cmp -s 'expected' 'timestamp' \
		    || echo >&2 "$mirror is outdated ($(cat 'timestamp'))."
	else
		echo >&2 "Cannot fetch $url: $(cat 'curl.log')"
	fi
done
cd "$OLDPWD"
date '+%F' >"$download_dir/timestamp"