Contents

require "clamav"

require_relative "scanner_adapter"
require_relative "scan_result"

module Ddr
  module Antivirus
    module Adapters
      #
      # Scanner adapter for the 'clamav' gem (Ruby libclamav bindings).
      #
      class ClamavScannerAdapter < ScannerAdapter
        
        def scan(path)
          reload!
          raw = engine.scanfile(path)
          ClamavScanResult.new(raw, path)
        end

        # Load or reload the database of virus signatures.
        def reload!
          #
          # ClamAV.instance.reload is supposed to reload the database if changed and return:
          #
          # 0 => unnecessary
          # 1 => successful
          # 2 => error (undocumented)
          #
          # However, reload raises a RuntimeError when the db needs to be reloaded, 
          # in which case, loaddb must be called.
          #
          engine.loaddb unless [0, 1].include?(engine.reload)
        rescue RuntimeError
          engine.loaddb
        end

        def engine
          ClamAV.instance
        end

      end

      #
      # Result of a scan with the ClamavScannerAdapter.
      #
      class ClamavScanResult < ScanResult

        def virus_found
          raw if has_virus?
        end

        def has_virus?
          ![0, 1].include?(raw)
        end

        def error?
          raw == 1
        end

        # A formatted status message (for consistency with clamdscan output).
        # @return [String] the result status.
        def status
          return "FOUND #{virus_found}" if has_virus?
          return "ERROR" if error?
          "OK"
        end

        def to_s
          "#{file_path}: #{status} (#{version})"
        end

        def default_version
          # Engine and database versions
          # E.g., ClamAV 0.98.3/19010/Tue May 20 21:46:01 2014
          `sigtool --version`.strip
        end

      end

    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
ddr-antivirus-1.3.3	lib/ddr/antivirus/adapters/clamav_scanner_adapter.rb
ddr-antivirus-1.3.2	lib/ddr/antivirus/adapters/clamav_scanner_adapter.rb
ddr-antivirus-1.3.1	lib/ddr/antivirus/adapters/clamav_scanner_adapter.rb