[tor-bugs] #10006 [Pluggable transport]: Build an obfs-flash PT bundle

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#10006: Build an obfs-flash PT bundle
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     Reporter:  dcf                  |      Owner:  dcf
         Type:  task                 |     Status:  new
     Priority:  normal               |  Milestone:
    Component:  Pluggable transport  |    Version:
   Resolution:                       |   Keywords:
Actual Points:                       |  Parent ID:  #7167
       Points:                       |
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Comment (by dcf):

 Here are some things I found while web searching around, that may have
 been also touched on in IRC.

   [http://stackoverflow.com/questions/53208/how-do-i-automatically-
 destroy-child-processes-in-windows/53214#53214 How do I automatically
 destroy child processes in Windows?][[BR]]
   The Windows API supports objects called "Job Objects". The following
 code will create a "job" that is configured to shut down all processes
 when the main application ends (when its handles are cleaned up).

 The code sample there uses Windows API functions:
  * [http://msdn.microsoft.com/en-us/library/ms682409%28v=vs.85%29.aspx
 CreateJobObject]
  * [http://msdn.microsoft.com/en-us/library/ms686216(v=vs.85).aspx
 SetInformationJobObject]
  * [http://msdn.microsoft.com/en-us/library/ms681949%28v=vs.85%29.aspx
 AssignProcessToJobObject]

 These API function are available in the
 [http://sourceforge.net/projects/pywin32/ pywin32] library, which we
 already include in the browser bundle because it is a dependency of
 Twisted.
  * [http://timgolden.me.uk/pywin32-docs/win32job.html win32job]

 infinity0, what do you think of trying the CreateJobObject technique in
 subproc as a workaround until #9330 is fixed? The problem is that I
 foresee a solution to #9330 being several weeks off. I'm not sure if it
 will work, but if it does, (1) even if not 100% correct, it's correct
 enough to solve the "run Vidalia twice" problem, and (2) we can implement
 it locally, without necessitating new Tor and vanilla bundle releases.

 The main difficulty I foresee is that the subprocess module may not give
 visibility to the handle under the Popen object (maybe
 [http://docs.python.org/2/library/msvcrt.html#msvcrt.get_osfhandle
 msvcrt.get_osfhandle] will work?). It'd be great to be able to test this
 idea, without completely rewriting subproc to use CreateProcess etc.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10006#comment:13>
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