New submission from Aaron Brady <castiro...@gmail.com>:
os.pipe should return inheritable descriptors on Windows.
Patch below, test attached. New pipe() returns descriptors, which
cannot be inherited. However, their permissions are set correctly, so
msvcrt.get_osfhandle and msvcrt.open_osfhandle can be used to obtain an
inheritable handle.
Docs should contain a note to the effect. 'On Windows, use
msvcrt.get_osfhandle to obtain a handle to the descriptor which can be
inherited. In a subprocess, use msvcrt.open_osfhandle to obtain a new
corresponding descriptor.'
--- posixmodule_orig.c 2008-12-20 20:01:38.296875000 -0600
+++ posixmodule_new.c 2008-12-20 20:01:54.359375000 -0600
@@ -6481,8 +6481,12 @@
HANDLE read, write;
int read_fd, write_fd;
BOOL ok;
+ SECURITY_ATTRIBUTES sAttribs;
Py_BEGIN_ALLOW_THREADS
- ok = CreatePipe(&read, &write, NULL, 0);
+ sAttribs.nLength = sizeof( sAttribs );
+ sAttribs.lpSecurityDescriptor = NULL;
+ sAttribs.bInheritHandle = TRUE;
+ ok = CreatePipe(&read, &write, &sAttribs, 0);
Py_END_ALLOW_THREADS
if (!ok)
return win32_error("CreatePipe", NULL);
----------
components: Library (Lib), Windows
files: os_pipe_test.py
messages: 78136
nosy: castironpi
severity: normal
status: open
title: os.pipe should return inheritable descriptors (Windows)
type: behavior
versions: Python 2.6, Python 2.7, Python 3.0, Python 3.1
Added file: http://bugs.python.org/file12408/os_pipe_test.py
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<http://bugs.python.org/issue4708>
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