[Python-Dev] (New) PEP 446: Make newly created file descriptors non-inheritable

[Victor Stinner]

> On Windows, the ``subprocess`` closes all handles and file descriptors
> in the child process by default. If at least one standard stream (stdin,
> stdout or stderr) is replaced (ex: redirected into a pipe), all
> inheritable handles are inherited in the child process.
>
> Summary:
>
> ===========================  =============  ==================  =============
> Module                       FD on UNIX     Handles on Windows  FD on Windows
> ===========================  =============  ==================  =============
> subprocess, default          STD, pass_fds  none                STD

Oh, the summary table is wrong for the "subprocess, default" line: all
inheritable handles are inherited if at least one standard stream is
replaced.

Victor