[Twisted-Python] spawnProcess under Win32
glyph at divmod.com
glyph at divmod.com
Mon Aug 14 08:14:51 MDT 2006
On Mon, 14 Aug 2006 15:15:55 +0200, Igor Kravtchenko <igor at mekensleep.com> wrote:
>Hi!
>I've looked at the way Twisted creates a process under Win32 and I've
>noticed
>that it uses the CreateProcess() function. The problem is it doesn't
>mention any
>creation flags (i.e.: it just passes 0) whereas here, we would need to pass
>DETACHED_PROCESS to avoid a new console to be created.
>I would be interested to know what do you think about this?
>Does it seem to you a good idea?
Well, we do have a UNIX-specific argument to spawnProcess (usePTY), so I don't see why we couldn't have a Win32-specific argument as well. However, "win32flags" seems like a pretty vague name, especially since it could be CreateProcess's dwCreationFlags argument or STARTUPINFO's dwFlags attribute.
Also, depending on context, you might want CREATE_NO_WINDOW or DETACHED_PROCESS or possibly both.
I believe the right thing to do is to come up with some typical features of the Windows process environment and support them explicitly. I don't believe all the flags you can pass to CreateProcess are compatible with the way Twisted expects subprocesses to behave, and I am definitely sure that not all the things you can put in STARTUPINFO are.
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