Module: Win32Open4

Defined in:
lib/procreate/win32/open4.rb

Overview

An implementation of Open4 for windows, based largely on a post by Simon Kröger to comp.lang.ruby - “Problem with popen on windows” (groups.google.com/group/comp.lang.ruby/browse_thread/thread/a40bac71df1f4a4c).

Provides an api that loosely matches Ara Howard’s Open4 (at least for Open4.background so far).

Defined Under Namespace

Modules: Kernel32 Classes: ProcessHandler

Class Method Summary collapse

Class Method Details

.background(cmdline, params = {}) ⇒ Object

Launches a process asynchronously, and returns a thread that can be used to retrieve exit status, or wait for completion. All calls used are non-blocking such that it works safely with ruby’s green threads.

Note that while broadly compatible there are a number of differences from original Open4.background - eg parameters like :status are ignored (in fact it works like :status => true in that it won’t throw exceptions).



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# File 'lib/procreate/win32/open4.rb', line 280

def self.background cmdline, params={}
  ph = ProcessHandler.new cmdline, params
  pid = ph.instance_variable_get :@processId
  thread = Thread.new { ph.run }
  sc = class << thread; self; end
  sc.module_eval do
    define_method(:pid) { pid }
    define_method(:exitstatus) { value }
  end
  thread
end