tree d95a4dd911ebc05549fe54dee0b76c67fe5c727a
parent 87010e85cb37192d63b1a30e5fabba307ad5a3f5
author Segev Finer <segev208@gmail.com> 1513589299 +0200
committer Victor Stinner <victor.stinner@gmail.com> 1513589299 +0100

bpo-19764: Implemented support for subprocess.Popen(close_fds=True) on Windows (#1218)

Even though Python marks any handles it opens as non-inheritable there
is still a race when using `subprocess.Popen` since creating a process
with redirected stdio requires temporarily creating inheritable handles.
By implementing support for `subprocess.Popen(close_fds=True)` we fix
this race.

In order to implement this we use PROC_THREAD_ATTRIBUTE_HANDLE_LIST
which is available since Windows Vista. Which allows to pass an explicit
list of handles to inherit when creating a process.

This commit also adds `STARTUPINFO.lpAttributeList["handle_list"]`
which can be used to control PROC_THREAD_ATTRIBUTE_HANDLE_LIST
directly.