#!/usr/bin/ruby -Ilib/
#
# Usage information at the end of the script.
#

require 'getoptlong'
require 'custodian/util/ping'

#
#  Options set by the command-line.
#
help   = false
manual = false

opts = GetoptLong.new(
  ['--help',   '-h', GetoptLong::NO_ARGUMENT],
  ['--manual', '-m', GetoptLong::NO_ARGUMENT]
)

begin
  opts.each do |opt, _arg|
    case opt
    when '--help' then
      help = true
    when '--manual' then
      manual = true
    end
  end
rescue => err
  # any errors, show the help
  warn err.to_s
  help = true
end

#
# Show the help information.
#
if manual || help
  DATA.read.split("\n").each do |line|
    puts Regexp.last_match(1).dup if line =~ /^# ?(.*)/
  end
  exit 0
end

#
#  Get the address to ping.
#
hostname = ARGV.shift

#
#  Abort if we don't have a hostname
#
if hostname.nil?
  puts "Usage: #{$PROGRAM_NAME} hostname"
  exit 1
end

#
#  Create the object
#
helper = Custodian::Util::Ping.new(hostname)

#
#  Ping the host, via the helper
#
if helper.run_ping
  puts "#{hostname} - #{helper.address} - is alive."
  exit 0
else
  exit 1
end


__END__
#
# NAME
#   multi-ping - IPv4 and IPv6 ping tool
#
#
# SYNOPSIS
#  multi-ping  [ -h | --help ] [-m | --manual] hostname
#
#
# OPTIONS
#
#  -h, --help      Show a help message, and exit.
#
#  -m, --manual    Show this manual, and exit.
#
#
# ABOUT
#
#  The multi-ping tool is designed to be IPv4/IPv6-agnostic ping tool,
# which removes the need to know if you're pinging an IPv4 host or an
# IPv6 host.
#
#  The tool works by resolving the hostname specified upon the command line,
# and invoking "ping" or "ping6" upon the result - using the correct one for
# the address family which has been returned.
#
#
# AUTHOR
#
#  Steve Kemp  <steve@bytemark.co.uk>
#