From 50faa3de62d55ba93a0a8e423c919a9c090caaf9 Mon Sep 17 00:00:00 2001
From: Steve Kemp <steve@steve.org.uk>
Date: Tue, 13 Nov 2012 15:45:52 +0000
Subject:   Added --help + --manual flags.

---
 util/multi-ping | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 86 insertions(+), 7 deletions(-)

(limited to 'util/multi-ping')

diff --git a/util/multi-ping b/util/multi-ping
index 9f60762..0d2add5 100755
--- a/util/multi-ping
+++ b/util/multi-ping
@@ -1,19 +1,98 @@
-#!/usr/bin/ruby
+#!/usr/bin/ruby1.8 -w
 #
-#  Given a hostname, or IP address, run a ping test against it.
+# NAME
+#   multi-ping - IPv4 and IPv6 ping tool
 #
-#  This tool looks up the IP address to determine whether to run the
-# test with the system binaries "ping" or "ping6".
+# SYNOPSIS
+#  multi-ping  [ -h | --help ] [-m | --manual] hostname1
 #
-# Steve
-# --
+# 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.
 #
-- 
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