Class: Facter::Core::Execution::Popen3

Inherits:
Object
  • Object
show all
Defined in:
lib/facter/custom_facts/core/execution/popen3.rb

Overview

Since:

  • 2.0.0

Class Method Summary collapse

Class Method Details

.popen3e(*cmd, &block) ⇒ Object

Since:

  • 2.0.0



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# File 'lib/facter/custom_facts/core/execution/popen3.rb', line 41

def self.popen3e(*cmd, &block)
  opts = if cmd.last.is_a? Hash
           cmd.pop.dup
         else
           {}
         end
  in_r, in_w = IO.pipe
  opts[:in] = in_r
  in_w.sync = true
  out_r, out_w = IO.pipe
  opts[:out] = out_w
  err_r, err_w = IO.pipe
  opts[:err] = err_w
  popen_rune(cmd, opts, [in_r, out_w, err_w], [in_w, out_r, err_r], &block)
end

.popen_rune(cmd, opts, child_io, parent_io) ⇒ Object

:nodoc:

Since:

  • 2.0.0



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# File 'lib/facter/custom_facts/core/execution/popen3.rb', line 16

def self.popen_rune(cmd, opts, child_io, parent_io) # :nodoc:
  pid = spawn(*cmd, opts)
  child_io.each(&:close)
  result = [*parent_io, pid]
  if defined? yield
    begin
      return yield(*result)
    ensure
      parent_io.each(&:close)
      begin
        Process.wait(pid)
      rescue Errno::ENOENT
        # For some reason, the first Process.wait executed in JRuby
        # always fails with ENOENT. However, the command output is
        # filled in so we just need to silently continue.
        # https://github.com/jruby/jruby/issues/5971
        raise unless RUBY_PLATFORM == 'java'

        @log.debug('Caught ENOENT during Process.wait on JRuby, continuing...')
      end
    end
  end
  result
end