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# -*- coding: binary -*-
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module Msf
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module Util
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class Helper
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  # Cross-platform way of finding an executable in the $PATH.
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  #
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  #   which('ruby') #=> /usr/bin/ruby
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  def self.which(cmd)
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    exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
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    ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
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      exts.each { |ext|
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        exe = File.join(path, "#{cmd}#{ext}")
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        return exe if File.executable?(exe) && !File.directory?(exe)
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      }
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    end
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    return nil
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  end
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end
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end
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end
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