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authorSteve Kemp <steve@steve.org.uk>2012-11-13 17:22:43 +0000
committerSteve Kemp <steve@steve.org.uk>2012-11-13 17:22:43 +0000
commita05a3cb59b26b0eff338b82a8cdf2627839e4cec (patch)
treeeacbf6a3573759ea0f1ee8348a09ca39d60028b7 /bin/multi-ping
parenta977d57759bbe20ae6a6eff6ef1af29a6b7ff936 (diff)
Renamed and moved files around.
Diffstat (limited to 'bin/multi-ping')
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diff --git a/bin/multi-ping b/bin/multi-ping
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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.
+#