metasploit-framework/tools/pattern_offset.rb

#!/usr/bin/env ruby

$:.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))

require 'rex'

if ARGV.length < 1 
	$stderr.puts("Usage: #{File.basename($0)} <search item> <length of buffer>")
	$stderr.puts("Default length of buffer if none is inserted: 8192")
	$stderr.puts("This buffer is generated by pattern_create() in the Rex library automatically")
	exit
end

value = ARGV.shift
len   = ARGV.shift || 8192

value  = value.hex if (value.length >= 8 and value.hex > 0)
buffer = Rex::Text.pattern_create(len.to_i)

puts Rex::Text.pattern_offset(buffer, value)