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+#!/usr/bin/ruby1.8 -w
+#
+# NAME
+#   multi-ping - IPv4 and IPv6 ping tool
+#
+# SYNOPSIS
+#  multi-ping  [ -h | --help ] [-m | --manual] hostname1
+#
+# OPTIONS
+#
+#  -h, --help              Show a help message, and exit.
+#
+#  -m, --manual            Show this manual, and exit.
+#
+#  -v, --verbose           Show verbose errors
+#
+# 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 which has been returned.
+#
+# AUTHOR
+#
+#  Steve Kemp  <steve@bytemark.co.uk>
+#
+
+
+require 'getoptlong'
+require 'socket'
+
+
+
+#
+#  Options set by the command-line.  These are all global.
+#
+$help   = false
+$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'
+      $help = true
+    when '--manual'
+      $manual = true
+    end
+  end
+rescue => err
+  # any errors, show the help
+  warn err.to_s
+  $help = true
+end
+
+
+#
+# CAUTION! Here be quality kode.
+#
+if $manual or $help
+
+  # Open the file, stripping the shebang line
+  lines = File.open(__FILE__){|fh| fh.readlines}[1..-1]
+
+  found_synopsis = false
+
+  lines.each do |line|
+
+    line.chomp!
+    break if line.empty?
+
+    if $help and !found_synopsis
+      found_synopsis = (line =~ /^#\s+SYNOPSIS\s*$/)
+      next
+    end
+
+    puts line[2..-1].to_s
+
+    break if $help and found_synopsis and line =~ /^#\s*$/
+
+  end
+
+  exit 0
+end
+
+
+
+
+#
+#  Get the address to ping.
+#
+hostname = ARGV.shift
+
+#
+#  If we have no host then abort
+#
+if ( hostname.nil? )
+  puts "Usage: #{$0} hostname"
+  exit 1
+end
+
+
+#
+#  The IP we'll deal with
+#
+ip = nil
+
+
+#
+#  Lookup the IP, catching any exception
+#
+begin
+  Socket.getaddrinfo(hostname, 'echo').each do |a|
+    ip = a[3]
+  end
+rescue SocketError
+  puts "Failed to resolve: #{hostname}"
+  exit 1
+end
+
+
+#
+#  Was the result an IPv4 address?
+#
+if ( ip =~ /^([0-9]+).([0-9]+).([0-9]+).([0-9]+)$/ )
+
+  #
+  #  If so invoke "ping"
+  #
+  if ( system( "ping -c 1 #{ip} 2>/dev/null >/dev/null" ) == true )
+    puts "#{hostname} alive."
+    exit 0
+  else
+    puts "ping4 failed - #{hostname} [#{ip}]"
+    exit 1
+  end
+elsif ( ip =~ /2001/ )
+
+  #
+  #  Was the result an IPv6 address?
+  #
+  if ( system( "ping6 -c 1 -w1 #{ip} 2>/dev/null >/dev/null" ) == true )
+    puts "#{hostname} alive."
+    exit 0
+  else
+    puts "ping6 failed - #{hostname} [#{ip}]"
+    exit 1
+  end
+end
+
+
+#
+#  All done.
+#