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Python subprocess with shell = True: redirect and platform-independent subprocess killing

It's hard for me to get what I want from the python subprocess module (which should be a unified / platform-independent abstraction, afaik, but don't make me start with this :)).

So, for me, what I need is the following. I want to

  • Launch an external (stdio) application (possibly with a subprocess) where I use shell-style redirects (e.g.. / Myapp> stdout_log> stderr_log)
    • Basically, I want to execute a shell command line, so I have to specify shell = True for subprocess.Popen () (otherwise redirects on the command line will not work)
  • I want to run this command line in async mode (so that it runs as an independent subprocess, but my python process will not wait for completion)
  • (My parent python process will check child process logs from time to time to extract information, but this is not relevant)
  • If my parent python process decides, it should be able to terminate this child process.

Now my main problems are that

  • Basically I have to use shell = True to get redirects to work
  • Handling the child stdout / stderr in the parent python process is not an option since I could not find the functionality for this in standby mode (and the parent python process must do other things while the child process is running)
  • shell = True, subprocess.kill() ,
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