Module: Reviser::Helpers::System

Included in:
Criteria::Compilation, Extensions::Valgrind
Defined in:
lib/reviser/helpers/system.rb

Instance Method Summary collapse

Instance Method Details

#exec_with_timeout(cmd, timeout = Cfg[:timeout]) ⇒ Object

Executes the given command and kills it if its execution time > timeout

Returns:

  • stdout, stderr & process_status



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# File 'lib/reviser/helpers/system.rb', line 47

def exec_with_timeout(cmd, timeout = Cfg[:timeout])
  stdin, stdout, stderr, wait_thr = Open3.popen3(cmd)
  process_status = -1

  stdin.close
  #
  # We try to wait for the thread to join
  # during the given timeout.
  # When the thread has joined, process_status
  # will be an object, so we can check and
  # return at the end if it failed to complete
  # before time runs out.
  #
  begin
    Timeout.timeout(timeout) do
      process_status = wait_thr.value
    end
  rescue Timeout::Error
    #
    # Then whether it suceeded or not,
    # we kill the process
    #
    begin
      Process.kill('KILL', wait_thr[:pid])
    rescue Object => e
      $stderr << "Unable to kill process : #{e.to_s}"
    end
  end

  result = {
    :stdout => process_status == -1 && 'Timeout' || stdout.read,
    :stderr => process_status == -1 && 'Timeout' || stderr.read,
    :process_status => process_status == -1 && 'Timeout' || process_status
  }
  
  result.delete :process_status unless process_status != -1

  stdout.close
  stderr.close

  result
end

#find_executable ⇒ Object

Returns the first executable found.

Returns:

  • the first executable found



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# File 'lib/reviser/helpers/system.rb', line 37

def find_executable
  Dir['*'].select { |f| File.executable?(f) && !File.directory?(f) }.first
end